JP2012115003A - Control device and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device and a control method which allow effective utilization of power by using a storage battery and a heat accumulator.SOLUTION: The control device, which is provided to a consumer having a storage battery and a heat accumulator and controls the storage battery and the heat accumulator, comprises a schedule determination unit which determines an operation schedule for operating the storage battery and the heat accumulator, on the basis of reference information which can be acquired by the consumer.

Description

  The present invention relates to a control device and a control method that are provided in a consumer having a storage battery and a heat storage device and control the storage battery and the heat storage device.

  Conventionally, in order to reduce the power consumption of electrical appliances in consumers such as ordinary households, there is a technology for determining a schedule for operating electrical appliances according to the lifestyle of consumers and operating electrical appliances according to the determined schedule. It has been proposed (see, for example, Patent Document 1). If such a technique is applied, the consumer can operate the home appliance in accordance with the lifestyle, so that energy saving can be achieved.

  By the way, in recent years, interest in effective use of electric power, such as smart grid technology, is increasing. In addition, storage batteries capable of storing electric power have begun to become popular among consumers, and their capacities are increasing year by year. If such a storage battery is used, the power stored when the power demand is low can be used (discharged) when the power demand is high, so that the power can be used effectively.

  On the other hand, not only the storage battery mentioned above but the use of the regenerator which converts electric power into heat and stores this heat as warm water is also spreading. Similarly to the above-described storage battery, such a heat accumulator can effectively use electric power by storing heat when electric power demand is low.

JP 2008-252441 A

  However, since the power consumption when storing electricity in the storage battery and the power consumption when storing heat in the heat accumulator are high, general consumers who have limited allowable power consumption cannot perform both storage and heat storage simultaneously. In addition, since the period of low power demand during the day is limited, the power storage in the battery and the heat storage in the heat storage must be performed when the power demand is high unless planned. In some cases, power storage or heat storage could not be performed. In other words, for customers with limited power consumption and low power demand periods, in order to use the power as effectively as possible, it is necessary to use the power effectively unless the storage battery or the heat accumulator is operated systematically. There was a problem that could not be done.

  Then, this invention is made | formed in view of the above-mentioned point, and it aims at providing the control apparatus and control method which can use electric power effectively using a storage battery or a heat storage device.

  In order to solve the above-described problems, the present invention has the following features.

  A first feature of the present invention is provided in a consumer (smart house 10) having a storage battery (first storage battery 108, second storage battery 109) and a heat storage (heat storage device 114), and the storage battery and the heat storage A control device (smart controller 102) for controlling the storage device, and a schedule determination unit (schedule determination unit) for determining an operation schedule for operating the storage battery and the heat storage device based on reference information obtainable by the consumer 164).

  Another feature of the control device according to the present invention is that, in the above feature, the reference information includes power rate information indicating a power rate, and an amount of power consumed by a load device (such as the air conditioner 112) provided in the consumer. The summary includes at least one of power consumption information indicating a predicted value or predicted power generation information indicating a predicted value of the amount of power generated by a DC power source (solar cell 106) provided in the consumer.

  According to such a control device, the operation schedule can be determined in consideration of the power rate, the predicted value of the amount of power consumed by the load device, the predicted value of the amount of power generated by the DC power supply, and the like. Rather, the operation schedule of the storage battery and the regenerator can be determined more systematically. Therefore, according to this control apparatus, electric power can be used effectively using a storage battery or a heat accumulator.

  Another feature of the control device according to the present invention is that, in the above feature, the schedule determining unit sets a period during which the predicted value indicated by the predicted power generation information is a predetermined value or more (power generation threshold value or more) in the storage battery. The gist is to determine the operation schedule as a period for storing electricity or a period for storing heat in the regenerator.

  According to such a control device, for example, a period in which the amount of power generated by the DC power source is a large amount of power (excessive power generation) greater than or equal to a predetermined value, a period in which power is stored in the storage battery, or a period in which heat is stored in the regenerator Since an operation schedule can be determined, electric power can be used more effectively.

  The 2nd characteristic of this invention is provided in the consumer (smart house 10) provided with a storage battery (the 1st storage battery 108, the 2nd storage battery 109) and a thermal storage (heat storage apparatus 114), The said storage battery and the said thermal storage Control device (smart controller 102) for controlling the storage battery, the storage battery based on at least one of storage information indicating a storage amount of the storage battery or storage information indicating a heat storage amount (hot water amount) of the regenerator And a schedule determination unit (schedule determination unit 164) for determining an operation schedule for operating the regenerator.

  According to such a control apparatus, an operation schedule is determined based on the storage amount of a storage battery. In other words, according to such a control device, the operation schedule of the storage battery and the heat accumulator is determined while grasping the storage amount of the storage battery to be an appropriate value, so that the stored power can be left or short as much as possible. Can be avoided. Furthermore, according to this control device, it is also possible to determine the operation schedule by grasping the amount of heat stored in the heat accumulator. Therefore, according to this control apparatus, it becomes possible to use electric power effectively using a storage battery or a heat accumulator.

  Another feature of the control device according to the present invention is that in the above feature, the schedule determination unit preferentially stores the storage battery when the storage amount indicated by the storage information is equal to or less than a predetermined amount. The gist is to determine the operation schedule.

  According to such a control device, when the storage amount is equal to or less than the predetermined amount, the operation schedule is determined so as to give priority to the storage battery storage, so that an appropriate operation schedule can be determined so that the storage battery does not run out of power.

  Another feature of the control device according to the present invention is that, in the above feature, the schedule determination unit includes power charge information indicating a power charge, and a consumption value indicating a predicted value of power consumed by a load device provided in the consumer. The gist is to determine the operation schedule based on at least one of power information or predicted power generation information indicating a predicted value of the amount of power generated by the DC power source.

  According to such a control device, it is possible to determine an appropriate operation schedule in consideration of not only the storage amount of the storage battery but also power rate information, power consumption information, and predicted power generation information.

  A third feature of the present invention is a control method in a control device that is provided in a consumer having a storage battery and a heat accumulator and controls the storage battery and the heat accumulator, and can be obtained by the consumer. And a step of determining an operation schedule for operating the storage battery and the regenerator (step S104).

  A fourth feature of the present invention is a control method in a control device that is provided in a consumer having a storage battery and a heat storage device and controls the storage battery and the heat storage device. Alternatively, the present invention includes a step (step S115) of determining an operation schedule for operating the storage battery and the heat storage device based on at least one of heat storage information indicating the heat storage amount of the heat storage device.

  ADVANTAGE OF THE INVENTION According to this invention, the control apparatus and control method which can use electric power effectively can be provided using a storage battery or a heat storage device.

It is a block diagram of the electric power system which concerns on 1st and 2nd embodiment of this invention. It is a block diagram of the smart controller which concerns on 1st and 2nd embodiment of this invention. It is a figure which shows the time transition of the electric power charge which concerns on 1st Embodiment of this invention. It is a figure which shows the time transition of the predicted value of the electric power generation amount in the solar cell which concerns on 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the smart controller which concerns on 1st Embodiment of this invention. It is a figure which shows the table memorize | stored in the memory | storage part which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the smart controller which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Next, an embodiment of the present invention will be described with reference to the drawings. Specifically, (1) the configuration of the power system, (2) the configuration of the smart controller, (3) the operation of the smart controller, and (4) the action / effect will be described. In the description of the drawings in the following embodiments, the same or similar parts are denoted by the same or similar reference numerals.

(1) Configuration of Power System FIG. 1 is a configuration diagram of a power system 1 according to an embodiment of the present invention. The power system 1 shown in FIG. 1 is a system that employs a so-called smart grid.

  As shown in FIG. 1, the power system 1 includes a smart house 10 that is a consumer of power, a power system 60 that is a power supplier, and an energy management system (EMS) that performs overall power control of the power system 1. 70 and the Internet 80 which is a communication path between the smart house 10 and the EMS 70. A plurality of smart houses 10 exist under the power system 60, and the plurality of smart houses 10 form a power consumer group.

  In the power system 1, power is transmitted from the power system 60 to the smart house 10, and power is used in the smart house 10. Moreover, the reverse power flow from the smart house 10 to the electric power system 60 may be performed as appropriate.

  In the power system 1, the amount of power used is measured in the smart house 10 and sent as measurement data to the EMS 70 via the Internet 80.

  The EMS 70 determines a power charge based on the power supply of the power system 60 and the power demand of the consumer group based on the measurement data. Here, the EMS 70 decreases the power rate as the value (supply / demand difference) obtained by subtracting the amount of power used in the customer group from the suppliable amount of power from the power system 60 to the customer group decreases, and as the supply / demand difference decreases. , Raise the electricity bill. That is, when the supply / demand difference is large, it is determined that the power demand is low and the power charge is lowered. When the supply / demand difference is small, the power charge is determined to be high and the power charge is increased. Specifically, the EMS 70 can determine a power charge of TOU (Time of Use), which is a power charge determined in advance for each time zone based on a past supply-demand difference.

  Furthermore, the EMS 70 transmits the determined power price of the TOU to the smart house 10 via the Internet 80 as power price information. Specifically, the EMS 70 transmits the power rate information before, for example, one day before the time zone in which the power rate information is applied, for example, in a 24-hour cycle.

  The smart house 10 includes a smart controller 102 as a control device, a smart meter 103, a hybrid power conditioner (hybrid PCS) 104, a solar battery 106 as a DC power source, a first storage battery 108 and a first storage battery 108 for storing electric power. 2 storage battery 109, lighting 110 and air conditioner 112 as load devices, and heat storage device 114 as a heat accumulator. Here, the 1st storage battery 108 is a permanent storage battery installed inside and outside of a consumer. The second storage battery 109 is a storage battery mounted on an electric vehicle (EV), a plug-in hybrid vehicle (PHV), or the like. In the present embodiment, the case where the first storage battery 108 (hereinafter simply referred to as the storage battery 108) is provided in the smart house 10 will be mainly described. However, this may be used as the second storage battery 109. It should be noted. The heat storage device 114 is, for example, a water heater that boils water with heat and stores the heat as hot water. Further, the load device may include home appliances such as a television (not shown).

  The smart controller 102 is connected to the Internet 80 via a wide area communication line 90 that is a wired line or a wireless line. The smart controller 102 is connected to the smart meter 103, the hybrid PCS 104, the illumination 110, the air conditioner 112, and the heat storage device 114 via a home communication line 160 that is a wired line or a wireless line. The smart controller 102 can control these devices. For example, the smart controller 102 can control the storage battery 108 that stores electric power by controlling the hybrid PCS 104. The smart controller 102 can also appropriately monitor the amount of hot water stored in the heat storage device 114 and control the heat storage device 114 according to the amount of hot water. That is, the smart controller 102 is provided in a consumer and constitutes a control device that controls the storage battery 108 and the heat storage device 114. The configuration and operation of the smart controller 102 will be described later.

  The smart meter 103 is connected to the power grid 60 and to the home distribution line 150. The smart meter 103 detects the amount of electric power supplied from the power system 60 and used for the lighting 110, the air conditioner 112, the heat storage device 114, and the like, and transmits it as measurement data to the EMS 70 via the Internet 80.

  The hybrid PCS 104 is connected to the domestic distribution line 150 and to the solar battery 106 and the storage battery 108. The hybrid PCS 104 operates the solar battery 106 and the storage battery 108 according to the control of the smart controller 102. Moreover, the hybrid PCS 104 can cause the storage battery 108 to store DC power that is equal to or greater than the power generation threshold when the DC power generated by the solar cell 106 is equal to or greater than a predetermined power generation threshold.

  Further, the hybrid PCS 104 can convert DC power generated by the discharge of the storage battery 108 or DC power generated by the solar battery 106 into AC power and send it to the home distribution line 150 in accordance with the control of the smart controller 102. . The AC power sent to the home distribution line 150 is appropriately used in the lighting 110, the air conditioner 112, and the heat storage device 114, or becomes reverse power flow to the power system 60.

  In addition, the hybrid PCS 104 can convert AC power from the power system 60 into DC power and store the DC power in the storage battery 108. Further, the hybrid PCS 104 can appropriately monitor the amount of electricity stored in the storage battery 108 and transmit it to the smart meter 103 and the smart controller 102.

  The lighting 110, the air conditioner 112, and the heat storage device 114 are connected to the home distribution line 150 and to the home communication line 160. The illumination 110 and the air conditioner 112 operate with AC power from the domestic distribution line 150 in accordance with the control of the smart controller 102. Under the control of the smart controller 102, the heat storage device 114 converts AC power from the domestic distribution line 150 into heat, and stores this heat in hot water.

(2) Configuration of Smart Controller Next, the configuration of the smart controller 102 will be described. FIG. 2 is a configuration diagram of the smart controller 102. As illustrated in FIG. 2, the smart controller 102 includes a control unit 152, a storage unit 153, and a communication unit 154.

  The communication unit 154 receives power rate information and various control information from the EMS 70 via the wide area communication line 90 and the Internet 80. The communication unit 154 communicates with devices such as the smart meter 103, the hybrid PCS 104, and the heat storage device 114 via the home communication line 160.

  The storage unit 153 is configured by a memory, for example, and stores various information used for controlling each unit in the smart house 10. Specifically, the storage unit 153 stores predicted power generation information.

  Here, the predicted power generation information is information indicating a predicted value of the future (for example, the next day) of the amount of power generated by the solar cell 106, and the predicted value is associated with a time zone (time). . In addition, since the amount of power generated by the solar cell 106 is affected by sunlight conditions, the storage unit 153 stores information such as season (for example, autumn, October, etc.) and weather (for example, clear, cloudy, rain, etc.). A plurality of types of predicted power generation information is stored according to the conditions. The predicted power generation information may be information indicating the actual value of the amount of power generated by the solar cell 106 in the past.

  The control unit 152 is a CPU, for example, and controls each unit in the smart house 10. Control unit 152 includes an acquisition unit 162 and a schedule determination unit 164.

  The acquisition unit 162 acquires the power rate information (TOU) received by the communication unit 154. In addition, the acquisition unit 162 acquires, from the storage unit 153, predicted power generation information whose conditions such as season and weather are closest to the situation of the day. The acquisition unit 162 transmits the acquired power rate information and predicted power generation information to the schedule determination unit 164.

  The schedule determination unit 164 determines an operation schedule for operating the storage battery 108 and the heat storage device 114 in a predetermined period based on reference information that can be acquired by a consumer. Here, in the present embodiment, the case where the above-described reference information includes power rate information and predicted power generation information will be described as an example. The reference information only needs to include at least one of the power rate information and the predicted power generation information. Moreover, in this embodiment, the predetermined period mentioned above is demonstrated as 1 day. The predetermined period may be two days or more. The operation schedule includes a schedule for storing heat in the storage battery 108 and a schedule for storing heat in the heat storage device 114.

  Specifically, the schedule determination unit 164 acquires power rate information from the acquisition unit 162. The schedule determination unit 164 compares the power rate indicated by the acquired power rate information with a predetermined rate threshold of the power rate, and stores the candidate period or the heat storage device 114 that can be stored in the storage battery 108. Identify candidate periods during which heat can be stored.

  Here, FIG. 3 shows a relationship between a power charge as a TOU indicated in the power charge information and a charge threshold. As illustrated in FIG. 3, the schedule determination unit 164 specifies a period from time t11 to time t12 when the power charge is equal to or lower than a predetermined charge threshold as the candidate period described above.

  Further, the schedule determination unit 164 divides the identified candidate period into a plurality of candidate periods A1 to A2. The schedule determination unit 164 determines the operation schedule by assigning the divided candidate periods A1 to A2 as periods for storing the candidate periods A1 to A2 in the storage battery 108 and the heat storage device 114, respectively. In the above example, the case where the schedule determination unit 164 determines the operation schedule by dividing the candidate period into two periods A1 to A2 is described as an example. The operation schedule may be determined in the above manner.

  In addition, the schedule determination unit 164 acquires predicted power generation information from the acquisition unit 162. The schedule determination unit 164 determines the operation schedule as a period in which the predicted value of the electric energy indicated by the predicted power generation information is equal to or greater than the power generation threshold (predetermined value) as a period in which the storage battery 108 is stored or a heat storage device 114 is stored. .

  Specifically, the schedule determination unit 164 compares the predicted value of the electric energy indicated by the predicted power generation information with a predetermined power generation threshold value. The schedule determination unit 164 identifies a period in which the predicted value is equal to or greater than the power generation threshold as a candidate period that can be stored in the storage battery 108 or a candidate period that can be stored in the heat storage device 114.

  Here, FIG. 4 shows the relationship between the predicted value of the amount of power generated by the solar cell 106 and the power generation threshold. As illustrated in FIG. 4, the schedule determination unit 164 includes a period from time t21 to time t22, a period from time t23 to time t24, and a time as a period in which the predicted value indicated in the predicted power generation information is equal to or greater than the power generation threshold. The period from t25 to time t26 is specified. The schedule determination unit 164 identifies these periods as candidate periods.

  The schedule determination unit 164 divides the identified candidate period into a plurality of candidate periods B1 to B4. The schedule determination unit 164 determines the operation schedule by allocating the divided candidate periods B1 to B4 as a period for storing power in the storage battery 108 and a period for storing power in the heat storage device 114, respectively. Note that the schedule determination unit 164 may determine the driving schedule by further dividing the identified candidate period into a plurality of candidates, without being limited to the example of FIG.

  In this way, the schedule determination unit 164 adds the candidate period specified based on the predicted power generation information to the candidate period specified based on the power rate information, and determines the operation schedule.

  Further, the schedule determination unit 164 instructs the hybrid PCS 104 and the heat storage device 114 to operate the storage battery 108 and the heat storage device 114 according to the determined operation schedule.

(3) Operation of Smart Controller Next, the operation of the smart controller 102 in the power system 1 will be described. FIG. 5 is a sequence diagram showing the operation of the smart controller 102.

  In step S <b> 101, in the smart controller 102, the acquisition unit 162 receives power rate information from the EMS 70 via the communication unit 154. In addition, the acquisition unit 162 acquires, from the storage unit 153, predicted power generation information whose conditions such as season and weather are closest to the situation of the day. The acquisition unit 162 transmits the acquired power rate information and predicted power generation information to the schedule determination unit 164.

  In step S102, the schedule determination unit 164 determines whether or not the power rate indicated in the power rate information has a period equal to or less than the rate threshold. Moreover, the schedule determination part 164 determines whether there exists a period beyond a power generation threshold value in the predicted value shown by prediction power generation information. In addition, the schedule determination part 164 complete | finishes operation | movement, when it determines with there being no any period.

  In step S103, when the schedule determination unit 164 determines that there are periods that are less than or equal to the charge threshold, or periods that are greater than or equal to the power generation threshold, these schedule periods are stored in the candidate period or the heat storage device 114 that can store these periods in the storage battery 108. It is specified as a candidate period during which heat can be stored.

  In step S104, the schedule determination unit 164 divides the identified candidate period into a plurality of times, assigns the divided candidate periods as a period for storing power in the storage battery 108 and a period for storing heat in the heat storage device 114, and determines an operation schedule.

  In this way, the schedule determination unit 164 determines the operation schedule of the storage battery 108 and the heat storage device 114. Note that the schedule determination unit 164 may execute the operations of steps S101 to S104 each time it receives power rate information, or may execute it at a predetermined time every day (for example, 22:00).

(4) Operation and Effect In the electric power system 1 according to the embodiment of the present invention, the storage battery 108 and the heat storage device 114 are provided in the smart house 10 that is a consumer of electric power, and the smart controller 102 in the smart house 10 is provided. Controls the storage and discharge of the storage battery 108 and the heat storage of the heat storage device 114. Specifically, the smart controller 102 acquires power charge information indicating the power charge of the TOU, and identifies a candidate period in which the power charge indicated by the power charge information is equal to or less than a charge threshold. In addition, the smart controller 102 identifies a period in which the predicted value of the predicted power generation information is equal to or greater than the power generation threshold as a candidate period. The smart controller 102 divides the identified candidate period into a plurality of times, assigns each of the divided candidate periods as a period for storing heat in the storage battery 108 or a period for storing heat in the heat storage device 114, and determines an operation schedule.

  In this way, the smart controller 102 predicts the power charge of the power supplied from the system power supply 300 and the amount of power generated by the solar battery 106, while taking into consideration the power demand between the system side and the demand side. Since the operation schedule including the schedule for storing power in the storage battery 108 and the schedule for storing heat in the heat storage device 114 is systematically determined, the AC power supplied from the power system 60 and the DC power supplied from the solar battery 106 are Both can be used effectively. Therefore, according to this electric power system 1, electric power can be used effectively using the storage battery 108 or the heat storage device 114.

[First Modification of First Embodiment]
Next, a first modification of the present embodiment will be described. In the embodiment described above, the schedule determination unit 164 uses the power rate information and the predicted power generation information as reference information, and determines the operation schedule based on the reference information. However, the schedule determination unit 164 determines the operation schedule using the power consumption information as reference information. May be.

  Specifically, in the present modification example, the storage unit 153 stores power consumption information. The power consumption information is information indicating a predicted value of the future (for example, the next day) of the amount of power consumed by load devices such as the lighting 110 and the air conditioner 112, and the predicted value corresponds to a time zone (time). It is attached.

  The power consumption information may be information determined based on the actual value of the amount of power consumed by the load device in the past. Further, the power consumption information may be information related to an operation condition (operation mode) set in the load device. The operating condition indicates a temperature setting when operating the air conditioner 112, a time setting when turning on / off the illumination 110, and the like according to the lifestyle of the user. A plurality of types of power consumption information are stored in the storage unit 153 according to conditions such as season (for example, autumn, October, etc.) and day of the week (for example, Monday).

  The schedule determination unit 164 acquires power consumption information from the storage unit 153 via the acquisition unit 162. The schedule determination unit 164 compares the predicted amount of power indicated by the power consumption information with a predetermined threshold value. The schedule determination unit 164 identifies a period in which the predicted value is equal to or less than the threshold as a candidate period that can be stored in the storage battery 108 or a candidate period that can be stored in the heat storage device 114. Moreover, the schedule determination part 164 divides | segments the identified candidate period into several, allocates the divided | segmented period as a period which accumulate | stores in the storage battery 108, or a period which heat-stores in the thermal storage apparatus 114, and determines an operation schedule.

  According to the smart controller 102 according to the present modified example, the storage battery 108 stores the heat and the heat storage device 114 during the period when the predicted value of the power amount indicated by the power consumption information is equal to or less than the threshold, that is, the period when the power demand is low. Thus, the operation schedule is determined as described above, so that an appropriate operation schedule can be determined in consideration of the power demand at the consumer.

[Modification 2 of the first embodiment]
Next, a second modification of the present embodiment will be described. In the above-described embodiment, the smart controller 102 is configured to determine the operation schedule based on the predicted value of the electric energy indicated in the predicted power generation information. The amount of power generated may be generated more or less than the predicted value of the amount of power indicated in the predicted power generation information.

  Therefore, the schedule determination unit 164 according to this modification example is configured to appropriately change the operation schedule according to the amount of power actually generated by the solar cell 106.

  Specifically, the schedule determination unit 164 periodically monitors the amount of power actually generated by the solar cell 106 even after determining the operation schedule. Then, when the amount of power in the period (the time t22 to the time t23 shown in FIG. 4) in which the predicted value is predicted to be less than the power generation threshold is actually greater than or equal to the power generation threshold, the schedule determination unit 164 also stores or Change the operation schedule to store electricity.

  On the other hand, the amount of power generated by the solar cell 106 is less than the predicted value, and the amount of power during the period predicted as being equal to or greater than the power generation threshold (from time t21 to time t22 shown in FIG. 4) is actually less than the power generation threshold. The schedule determination unit 164 changes the operation schedule so as to shorten the period of time for performing the previously determined power storage and heat storage.

  According to the smart controller 102 according to the present modification example, the operation schedule can be appropriately changed even when the amount of power generated by the solar cell 106 is larger or smaller than the predicted value.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

(1) Configuration of Power System The power system 1 according to this embodiment has the same configuration as that of the first embodiment except for the configuration of the smart controller 102. In the above-described embodiment, the smart controller 102 is configured to determine the daily operation schedule of the storage battery 108 and the heat storage device 114. However, in this embodiment, only the period in which the power rate is equal to or less than the charge threshold value. The driving schedule is determined for the target.

  Specifically, in the smart controller 102 according to the present embodiment, the acquisition unit 162 acquires power rate information (TOU). In addition, the acquisition unit 162 acquires storage information indicating the storage amount of the storage battery 108 from the hybrid PCS 104.

  In addition, as shown in FIG. 6, the storage unit 153 according to this embodiment stores “priority” of power storage or heat storage, “device name” for identifying a device, and conditions for determining the priority “ A priority table associated with “priority condition” is stored. The priority table is referred to by the schedule determination unit 164.

  The schedule determination unit 164 acquires power rate information and power storage information from the acquisition unit 162. The schedule determination unit 164 determines an operation schedule for operating the storage battery 108 and the heat storage device 114 based on the acquired power rate information and power storage information.

  Specifically, the schedule determination unit 164 according to the present embodiment sets a period during which the power rate indicated by the power rate information is equal to or less than the rate threshold, that is, a period from time t11 to time t12 in FIG. ). Further, the schedule determination unit 164 divides the identified candidate period into a plurality of periods A1 to A2.

  Further, the schedule determination unit 164 according to the present embodiment determines whether or not the storage amount indicated by the storage information is less than or equal to a threshold value (predetermined amount). If the storage amount is less than or equal to the threshold value, the storage battery 108 is prioritized. The operation schedule is determined so that power is stored.

  Specifically, the schedule determination unit 164 refers to the storage amount indicated in the storage information and the “priority condition” in the priority table of the storage unit 153. The schedule determination unit 164 determines whether or not the storage amount indicated in the storage information is equal to or less than the threshold based on the condition “priority condition 1 when the storage amount is equal to or less than the threshold” in the “priority condition”. When the schedule determination unit 164 determines that the amount of stored electricity is equal to or less than the threshold, the schedule determination unit 164 associates the “device name” and “storage battery” corresponding to the referred “priority condition” with the record of “priority” and “1”. Store in the priority table. Note that since the amount of power stored in the storage battery 108 decreases due to the consumption of equipment by the consumer, the schedule determination unit 164 periodically acquires power storage information and updates the priority table.

  Further, as shown in FIG. 3, the schedule determination unit 164 stores the storage battery 108 that is associated with “priority” “1” in the period from time t11 to time t12 when the power charge is equal to or less than the charge threshold. The operation schedule is determined with the period A1 shown in FIG. At this time, the schedule determination unit 164 may determine the operation schedule by adjusting the length of the period A1 so that the storage capacity of the storage battery 108 is sufficiently satisfied. That is, to preferentially determine the operation schedule is to determine the operation schedule including executing power storage or heat storage first and extending the period of power storage or heat storage.

  On the other hand, the schedule determination unit 164 stores the period A2 shown in FIG. 3 in the heat storage device 114 so that the heat storage of the heat storage device 114 associated with “priority” “2” is performed after the storage battery 108. The operation schedule is determined as the period to be performed.

  In addition, when the schedule determination unit 164 determines that the amount of power storage is not less than or equal to the threshold, the period for storing power in the storage battery 108 and the period for storing heat in the heat storage device 114 are appropriately equalized in the candidate period where the power rate is equal to or less than the charge threshold. To determine the driving schedule.

  Further, the schedule determination unit 164 instructs the hybrid PCS 104 and the heat storage device 114 to operate the storage battery 108 and the heat storage device 114 according to the determined operation schedule.

(2) Operation of Smart Controller Next, the operation of the smart controller 102 in the power system 1 according to the present embodiment will be described. FIG. 7 is a sequence diagram showing the operation of the smart controller 102.

  In step S <b> 111, the smart controller 102 receives power rate information from the EMS 70 and acquires power storage information indicating the amount of power stored in the storage battery 108 from the hybrid PCS 104.

  In step S112, the smart controller 102 compares the power charge indicated in the power charge information with a preset charge threshold. In addition, the smart controller 102 specifies a period in which the power rate is equal to or less than the charge threshold as a candidate period that can be stored in the storage battery 108 and a candidate period that can be stored in the heat storage device 114. Further, the schedule determination unit 164 divides the identified candidate period into a plurality of candidate periods A1 to A2.

  In step S113, the smart controller 102 refers to the “priority condition” in the priority table stored in the storage unit 153, and determines whether or not the power storage amount indicated by the power storage information is equal to or less than a threshold value (predetermined amount).

  In step S114, when the smart controller 102 determines that the amount of stored electricity is equal to or less than the threshold value, “priority” “1” in the priority table in the period from time t11 to time t12 when the power rate is equal to or less than the charge threshold value. The operation schedule is determined so that the storage battery 108 associated with is stored first. Specifically, the smart controller 102 determines the operation schedule as a period in which the period A1 is stored in the storage battery 108. On the other hand, the schedule determination unit 164 sets the period A2 as the period for storing heat in the heat storage device 114 so that the heat storage of the heat storage device 114 associated with “priority” “2” is performed next to the storage battery 108. Determine the driving schedule.

  On the other hand, in step S115, when the smart controller 102 determines that the amount of stored electricity is not less than or equal to the threshold value, the smart controller 102 may determine the operation schedule so that the storage battery 108 is stored first, or the heat storage device 114 is first stored. The operation schedule may be determined so as to be executed. Note that the operation schedule is determined so that the length of the period for storing electricity in the storage battery 108 and the length of the period for storing energy in the heat storage device 114 are equal.

  The smart controller 102 may execute the operations in steps S111 to S115 described above when receiving the power charge information. In addition, since the amount of power stored in the storage battery 108 decreases due to the consumption of equipment by the consumer, the operations in steps S111 to S115 described above are performed not only when the power rate information is received, but also the power rate indicated by the power rate information. It is preferable to perform the operation immediately before the charge threshold value is reached, that is, immediately before time t11 in FIG.

(3) Operation and Effect In the electric power system 1 according to the embodiment of the present invention, the storage battery 108 and the heat storage device 114 are provided in the smart house 10 that is a consumer of electric power, and the smart controller 102 in the smart house 10 is provided. Controls the storage and discharge of the storage battery 108 and the heat storage of the heat storage device 114. Specifically, the smart controller 102 acquires power rate information indicating the power rate, and acquires power storage information indicating the amount of power stored in the storage battery 108 from the hybrid PCS 104. The smart controller 102 identifies a candidate period in which the power rate is equal to or less than the rate threshold. In addition, when the storage amount of the storage battery 108 is equal to or less than the storage threshold, the smart controller 102 determines an operation schedule so that the storage of the storage battery 108 is prioritized during the identified candidate period. That is, the smart controller 102 determines an operation schedule for operating the storage battery 108 and the heat storage device 114 during a period in which the power rate is equal to or less than the charge threshold while grasping the storage amount of the storage battery 108 to an appropriate value. It is possible to avoid as much as possible or shortage of stored power. Therefore, according to the power system 1, the supplied power can be effectively used using the storage battery 108 and the heat storage device 114.

[Modification 1 of the second embodiment]
Next, a first modification of the present embodiment will be described. In the embodiment described above, the schedule determination unit 164 is configured to determine the operation schedule based on the power rate information, but based on the power consumption information indicating the predicted value of the amount of power consumed by the load device. The driving schedule may be determined.

  Specifically, in the present modification example, the storage unit 153 stores power consumption information. The power consumption information is information indicating a future predicted value of the amount of power consumed by load devices such as the lighting 110 and the air conditioner 112, and the predicted value is associated with a time zone (time).

  The schedule determination unit 164 acquires power consumption information from the storage unit 153 via the acquisition unit 162. The schedule determination unit 164 compares the predicted amount of power indicated by the power consumption information with a predetermined threshold value. The schedule determination unit 164 identifies a period in which the predicted value is equal to or less than the threshold as a candidate period that can be stored in the storage battery 108 or a candidate period that can be stored in the heat storage device 114. Moreover, the schedule determination part 164 divides | segments the identified candidate period into several, allocates the divided | segmented period as a period which accumulate | stores in the storage battery 108, or a period which accumulates heat in the thermal storage apparatus 114, and determines an operation schedule.

  In addition, the operation | movement which the schedule determination part 164 allocates the period which accumulates in the storage battery 108, and the period accumulating in the thermal storage apparatus 114 with respect to the divided candidate period is the same as that of step S113 thru | or S115 in FIG.

  According to the smart controller 102 according to the present modification example, whether or not to prioritize the storage of the storage battery 108 is determined even for a period in which the predicted value of the power consumption information is equal to or less than the threshold, and the operation schedule is determined. Can do.

[Second Modification of Second Embodiment]
Next, a second modification of the present embodiment will be described. In the embodiment described above, the schedule determination unit 164 is configured to determine the operation schedule based on the power rate information, but based on the predicted power generation information indicating the predicted value of the amount of power generated by the solar cell 106. The operation schedule may be determined.

  Specifically, the schedule determination unit 164 acquires the predicted power generation information from the storage unit 153 via the acquisition unit 162. The schedule determination unit 164 compares the predicted value of the electric energy indicated by the predicted power generation information with a predetermined power generation threshold value. The schedule determination unit 164 identifies a period in which the predicted value is equal to or greater than the power generation threshold as a candidate period that can be stored in the storage battery 108 or a candidate period that can be stored in the heat storage device 114.

  For example, as illustrated in FIG. 4, the schedule determination unit 164 includes a period from time t21 to time t22, a period from time t23 to time t24, as a period in which the predicted value indicated in the predicted power generation information is equal to or greater than the power generation threshold. The period from time t25 to time t26 is specified. The schedule determination unit 164 identifies these periods as candidate periods.

  Further, the schedule determination unit 164 divides the identified candidate period into a plurality of candidate periods B1 to B4. The schedule determination unit 164 determines the operation schedule by allocating the divided candidate periods B1 to B4 as a period for storing power in the storage battery 108 and a period for storing power in the heat storage device 114, respectively.

  The operation of assigning the storage period and the storage period to the candidate periods B1 to B4 divided by the schedule determination unit 164 is the same as steps S113 to S115 in FIG.

  According to the smart controller 102 according to this modified example, even in a period in which the predicted value of the amount of power generated by the solar battery 106 is equal to or greater than the threshold value, it is determined whether or not to prioritize the storage of the storage battery 108 and the operation schedule is set. Can be determined.

[Modification 3 according to the second embodiment]
Next, a third modification of the present embodiment will be described. In the embodiment described above, the schedule determination unit 164 has been described by taking as an example the case where the operation schedule is determined based on the storage information indicating the storage amount of the storage battery 108, but the heat storage information indicating the heat storage amount of the heat storage device 114. Based on the above, an operation schedule for operating the storage battery 108 and the heat storage device 114 may be determined.

  Specifically, the schedule determination unit 164 according to this modification example acquires heat storage information indicating the heat storage amount (hot water amount) of the heat storage device 114 from the heat storage device 114 via the acquisition unit 162. Moreover, the schedule determination part 164 determines whether the amount of hot water stored in the heat storage apparatus 114 is below a threshold value. When it is determined that the amount of hot water is equal to or less than the threshold, the schedule determination unit 164 determines the operation schedule so that the heat storage device 114 is preferentially stored. Note that the schedule determination unit 164 may execute such an operation in step S115 in FIG. 7, or may execute such an operation in place of the storage battery 108 in steps S113 to S115.

  Thereafter, the schedule determination unit 164 may determine the operation schedule so that the storage battery 108 is charged when the amount of hot water stored in the heat storage device 114 exceeds a threshold value (for example, 50%).

  As described above, the schedule determination unit 164 operates the storage battery 108 and the heat storage device 114 based on at least one of the storage information indicating the storage amount of the storage battery 108 and / or the heat storage information indicating the heat storage amount of the heat storage device 114. An operation schedule may be determined.

  According to the smart controller 102 according to the present modified example, an appropriate operation schedule can be determined while grasping not only the amount of electricity stored in the storage battery 108 but also the amount of heat stored in the heat storage device 114. Can be used effectively.

[Modification 4 according to the second embodiment]
Next, Modification Example 4 of the present embodiment will be described. In this modification, the smart house 10 is provided with two storage batteries, a first storage battery 108 and a second storage battery 109 for an electric vehicle.

  Here, generally, in the smart house 10, the allowable amount of power consumption is limited. In such a smart house 10, if the first storage battery 108 and the second storage battery 109, which have high power consumption, are stored at the same time, there is a high possibility that the power consumption will exceed the allowable amount. That is not preferable.

  Moreover, it is preferable that the second storage battery 109 for an electric vehicle always stores electric power sufficient for the electric vehicle to travel a predetermined distance or more so that the user can use the electric vehicle at any time.

  In view of such points, in the schedule determination unit 164 according to the present modification, the first storage battery 108 and the second storage battery are based on the respective storage amounts of the first storage battery 108 and the second storage battery 109. 109 is configured to determine an operation schedule.

  Specifically, the storage unit 153 according to the present modification example includes “second storage battery 109” as “device name” in the priority table and “second battery storage amount equal to or lower than a threshold” as “priority condition”. In this case, “highest priority (priority order 1)” is stored in association (not shown).

  Note that when the second storage battery 109 is connected to the hybrid PCS 104, the storage unit 153 notifies that the hybrid PCS 104 is connected to the smart controller 102, and the schedule determination unit 164 of the smart controller 102 notifies the notification. Based on the priority table.

  Moreover, it is preferable that the threshold value of the charge amount of the second storage battery is set to a charge amount that allows the electric vehicle to travel a distance of a predetermined distance or more. Such a threshold value may be calculated from an average value per day or the like based on the actual travel distance when a user uses an electric vehicle in a past predetermined period (for example, one week).

  Further, the schedule determination unit 164 acquires the storage information indicating the storage amount of the first storage battery 108 and the storage information indicating the storage amount of the second storage battery 109 from the hybrid PCS 104 via the acquisition unit 162.

  The schedule determination unit 164 first refers to the “priority condition” in the priority table and determines whether or not the amount of power stored in the second storage battery 109 is equal to or less than a threshold value. When it is determined that the amount of power stored in the second storage battery 109 is equal to or less than the threshold, the schedule determination unit 164 determines the operation schedule so that the power stored in the second storage battery 109 is prioritized. Note that the schedule determination unit 164 may determine the operation schedule so that the first storage battery 108 is charged when the storage amount of the second storage battery 109 exceeds a threshold value.

  On the other hand, when the schedule determination unit 164 determines that the amount of electricity stored in the second storage battery 109 is not less than or equal to the threshold (second threshold), the amount of electricity stored in the first storage battery 108 is less than or equal to the threshold (first threshold). It is determined whether or not. Subsequent operations are the same as steps S113 to S115 in FIG. In addition, although the case where the two storage batteries of the 1st storage battery 108 and the 2nd storage battery 109 were provided in the smart house 10 was mentioned as an example in this modified example, you may provide three or more.

  According to the smart controller 102 according to this modified example, when the smart house 10 includes the first storage battery 108 and the second storage battery 109 for the electric vehicle, the amount of power stored in the second storage battery 109 is less than or equal to the threshold value. It is determined first whether or not there is. In addition, when the smart controller 102 determines that the storage amount is equal to or less than the threshold value, the smart controller 102 can preferentially store the second storage battery 109.

  Thus, in the smart house 10, when the 1st storage battery 108 and the 2nd storage battery 109 are provided, considering the convenience so that a user can use an electric vehicle at any time, it is for electric vehicles. The second storage battery 109 can be stored with priority. In the present modification example, the method for determining the operation schedule based on the priority of the first storage battery 108 and the second storage battery 109 has been described. However, the operation schedule based on the priority including the heat storage device 114 as described above. It should be noted that it is of course preferable to formulate, and the explanation is omitted in this modified example.

[Other Embodiments]
As mentioned above, although this invention was described by embodiment, it should not be understood that the description and drawing which form a part of this indication limit this invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the case where the power rate information is TOU has been described as an example. However, the power rate information may be RTP (Real Time Pricing) determined based on a real-time supply-demand difference. . In this case, the smart controller 102 only needs to execute the operations of steps S101 to S104 in FIG. 5 each time it receives RTP transmitted at a cycle shorter than TOU (for example, at intervals of 10 minutes).

  In the above-described embodiment, the schedule determination unit 164 is configured to determine the schedule for storing power in the storage battery 108 and the schedule for storing heat in the heat storage device 114 as the operation schedule, but the schedule for discharging the storage battery 108 is also possible. It may be determined by being included in the operation schedule. In this case, the schedule determination unit 164 is effective if the operation schedule is determined by allocating a period during which the predicted value of power consumption indicated in the power consumption information is larger than a predetermined value as a period during which the storage battery 108 is discharged.

  In the above-described embodiment, the solar battery 106 is described as an example of the DC power source. However, the present invention can be similarly applied to a case where another DC power source such as a wind power generator is used. .

  In addition, the function of the smart controller 102 according to the above-described embodiment can be incorporated in another device such as the smart meter 103. The function of the smart controller 102 is applicable to various EMS (Energy Management System) in smart grid technology such as HEMS (Home Energy Management System) and BEMS (Building and Energy Management System).

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters in the scope of claims reasonable from this disclosure.

  Note that the configurations of the respective embodiments can also be combined. In addition, the operation and effect of each embodiment and each modification are merely a list of the most preferable operations and effects resulting from the present invention, and the operation and effect according to the present invention are described in each embodiment and each modification. It is not limited to the ones.

  DESCRIPTION OF SYMBOLS 1 ... Electric power system, 10 ... Smart house, 60 ... Electric power system, 70 ... EMS, 80 ... Internet, 90 ... Wide area communication line, 102 ... Smart controller, 103 ... Smart meter, 104 ... Hybrid PCS, 106 ... Solar cell, 108 ... Storage battery 110 ... Lighting 112 ... Air conditioner 114 ... Heat storage device 150 ... Home distribution line 152 ... Control unit 153 ... Storage unit 154 ... Communication unit 160 ... Home communication line 162 ... Acquisition unit 164 ... Schedule determination unit

Claims (8)

A control device is provided in a consumer having a storage battery and a heat storage device, and controls the storage battery and the heat storage device,
A control apparatus comprising: a schedule determination unit that determines an operation schedule for operating the storage battery and the heat accumulator based on reference information that can be acquired by the consumer. The reference information includes power rate information indicating a power rate, power consumption information indicating a predicted value of the amount of power consumed by a load device provided in the consumer, or the amount of power generated by a DC power source provided in the consumer. The control apparatus according to claim 1, comprising at least one of predicted power generation information indicating a predicted value of the power generation. The schedule determination unit determines the operation schedule by setting a period during which the predicted value indicated by the predicted power generation information is equal to or greater than a predetermined value as a period for storing power in the storage battery or for storing heat in the heat accumulator. The control device according to claim 2. A control device that is provided in a consumer having a storage battery and a heat storage device and controls the storage battery and the heat storage device,
A schedule determination unit that determines an operation schedule for operating the storage battery and the heat accumulator based on at least one of the storage information indicating the amount of power stored in the storage battery or the heat storage information indicating the heat storage amount of the heat accumulator; Control device characterized. The said schedule determination part determines the said operation schedule to preferentially store the said storage battery, when the said storage amount shown by the said electrical storage information is below predetermined amount, The said operation schedule is determined. Control device. The schedule determination unit indicates power rate information indicating a power rate, power consumption information indicating a predicted value of power consumed by a load device provided in the consumer, or a predicted value of power generated by a DC power source. The control device according to claim 4, wherein the operation schedule is determined based on at least one of the predicted power generation information. A control method in a control device for controlling a storage battery and the heat accumulator provided to a consumer having a storage battery and a heat accumulator,
A control method comprising a step of determining an operation schedule for operating the storage battery and the heat accumulator based on reference information that can be acquired by the consumer. A control method in a control device for controlling a storage battery and the heat accumulator, which is provided in a consumer having a storage battery and a heat accumulator,
Control including a step of determining an operation schedule for operating the storage battery and the heat storage device based on at least one of storage information indicating the storage amount of the storage battery or heat storage information indicating a heat storage amount of the heat storage device. Method.

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