WO2015008467A1

WO2015008467A1 - System controlling base station device connected to power grid, base station device, base station device control device, and charging control method therefor

Info

Publication number: WO2015008467A1
Application number: PCT/JP2014/003689
Authority: WO
Inventors: 中林　隆; 大炭　勇二; 湯田　直毅; 広明森; 末岡　一彦; 伊三男島田
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-07-19
Filing date: 2014-07-11
Publication date: 2015-01-22
Also published as: CN105393429B; CN105393429A; JPWO2015008467A1

Abstract

A base station device that: is connected to a power grid base station device having power supplied thereto from a power plant; has a storage battery also installed; and, once a determination is made that the power supply status of the power grid is unstable, stops charging the storage cell, reduces the charging speed, or reduces the load on a load device, and avoids power grid power outages. In addition, an inter-base station device control device is capable of avoiding power grid power outages and avoiding operation stoppages, by charging a storage cell connected to a base station device requiring more operation, by controlling a plurality of base station devices connected to the power grid.

Description

SYSTEM FOR CONTROLLING BASE STATION DEVICE CONNECTED TO POWER SYSTEM, BASE STATION DEVICE, BASE STATION DEVICE CONTROLLER, AND CHARGE CONTROL METHOD THEREOF

The present invention relates to a storage system connected to a power system and a control method thereof.

In order to perform stable communication at any time using a wireless communication terminal, it is necessary to always supply power to a base station apparatus that communicates with this wireless communication terminal. However, when a power failure occurs, the power supply to the base station device is cut off, communication is cut off, and it may take a considerable amount of time to restore power transmission. In particular, in countries and regions where power supply is not stable, power is not always supplied from the power system, such as blackouts in daily areas and power supplied only for a limited time. Therefore, power supplies other than the power system are required.

Although diesel power supplies are common, there is a risk of running out of fuel, the need for refueling, and adverse effects on the environment. In addition, since the driving cost is higher than the power system, it is conceivable to use a storage battery to be charged from the power system.

However, if the storage batteries of many base station apparatuses are charged at one time, the power supply of the power system becomes unstable, which may lead to a power failure of the power system.

JP, 2010-178479, A JP, 2008-141815, A JP, 2013-005638, A

The present invention is a charge control method of a storage battery provided in parallel to a base station device in a system for controlling a plurality of base station devices connected to a power system, which includes power supply information of a power system and power demand information of a load facility. It is characterized in that charge control of the storage battery is performed based on storage information (storage amount, battery temperature) of the storage battery.

The figure which showed the base station apparatus and storage battery which were connected to the electric power grid | system of this invention. Block diagram of base station apparatus of the present invention Block diagram of another base station apparatus of the present invention The figure which showed the base station apparatus electrical storage system of this invention Block diagram of inter-base station controller of the present invention Block diagram of base station apparatus communicating with inter-base station apparatus control apparatus of the present invention

First Embodiment
FIG. 1 is a diagram showing a base station apparatus and a storage battery connected to the power system of the present invention. Electric power is supplied from the power plant 100 to the base station apparatus 102 from the power grids 103 to 108 via the substation 110.

FIG. 2 is a diagram showing a base station apparatus 102 of the present invention. The base station apparatus 102 includes a base station apparatus control device 101, a load facility 205, and a power generation facility 208. The base station control device 101 includes a power state detection unit 202, a control unit 203, and a storage battery 204 (for example, a lithium ion battery). The power generation facility 208 may not necessarily be provided.

The power systems 103 to 108 branch toward the end, but the power supply becomes unstable at the end, and the power supply becomes unstable as the power consumption of the facility connected to each of the power systems 103 to 108 increases. Become. If power consumption exceeds the supply for each of the power systems 103 to 108 separated at the substation, there is a high possibility that a power failure will occur, but an excessive load may cause a power failure to the power system 103 of the root.

When the power generation facility 208 is provided side by side and the power generation facility 208 is a solar power generation facility, power is supplied from the power generation facility 208 to the load facility 205, and the storage battery 204 is charged if there is enough power generation.

If there is no solar power generation facility, or even if there is a solar power generation facility, electricity can not be generated due to the weather, power is supplied from any of the power grids 103 to 108 to the load facility 205 which can not supply power Furthermore, if it is determined from the storage information of the storage amount of the storage battery 204 and the like that the storage battery 204 needs to be charged, the storage battery 204 is charged.

If a power failure occurs, the control unit 203 supplies power from the storage battery 204 to the load facility 205 to continue the operation of the load facility 205. However, when there is a possibility that the storage amount of the storage battery 204 may be lost during a power failure, the control unit 203 shifts the load facility 205 from the normal operation mode to the low power operation mode to prevent the load facility 205 from stopping.

Even if there is a power failure and there is no amount of stored electricity, if the power generation facility 208 is diesel power generation or the like which does not depend on those conditions, the power generation facility 208 is operated by power generation control to continue the operation of the load facility 205. It becomes possible. If there is a margin in the amount of power generation, charging of the storage battery 204 from the power generation facility may be started.

The power generation facility 208 may use both solar power generation and diesel power generation.

When charging the storage battery 204 from any of the power grids 103 to 108 of the power grids 103 to 108 connected to the storage battery 204, the control unit 203 normally supplies power to the load equipment 205 of the base station apparatus from the power grids 103 to 108. Control to supply Further, control unit 203 controls storage battery 204 to be charged from power grids 103 to 108 when the storage amount of the storage battery is reduced. Here, the storage battery 204 has a plurality of charging rates. In the present embodiment, storage battery 204 has two charge modes (rapid charge, normal charge) having different charge rates. Although fast charging can be performed in a faster time than normal charging, it consumes more electricity. Although each base station device performs quick charging as much as possible in preparation for a power failure, if the rapid charging is simultaneously performed by a plurality of base station devices, the total amount of electricity used becomes enormous, so the power supply of the power grids 103 to 108 is supplied. That thing becomes unstable and may cause a power failure in the power systems 103-108.

The base station control device 101 detects power state information (frequency, voltage, current) of the power grids 103 to 108 by the power state detection unit 202 in order to avoid a power failure of the power grids 103 to 108. If it is determined from the power supply state that the power stability is unstable, charge control is performed to change the charge of the storage battery 204 to normal charge or to stop the charge itself and to be in charge standby. Here, the power stability is an index indicating the degree of stability of the grid power, and fluctuates depending on the amount of power supplied from the substation 110 and the amount of power consumed by facilities connected to the power grids 103 to. When the power stability deteriorates, there is a high possibility that a power failure from the end power systems 106 to 108 will occur. If the power stability further deteriorates, there is a high possibility that the

power grids

104 and 105 heading to the root will also lose power. If it gets worse further, there is a high possibility that the entire power grids 103 to 108 will fail. Excessive loading may cause a power outage to the underlying power system.

Specifically, by monitoring the frequency, voltage and current of the grid power (power supplied from the power grids 103 to 108), the power stability is judged from the power status information such as the power grid frequency, voltage and current. Do. As for the frequency, when the total load of the grid power increases, the frequency of the AC signal supplied from the grid power decreases. When the frequency is detected by a zero cross counter or the like and the frequency becomes lower than a predetermined frequency, it can be determined that the power stability is low. Voltage monitoring detects a drop in voltage supplied from the grid power. Current monitoring detects a drop in current supplied from the grid power. Voltage monitoring and current monitoring can detect the power stability of the grid power with a simple configuration as compared to frequency monitoring. In addition, the power supply state becomes unstable by capturing not only the grid power frequency, voltage, and current values, but also abrupt changes in grid power frequency, voltage, and current values (that is, power stability Can also be detected.

Then, if it is determined that the power supply state has become stable (that is, the power stability has increased) in the normal charging or charging standby state, in the case of the normal charging, the battery 204 is returned to the rapid charging. When charging standby, perform charging control to resume quick charging or normal charging.

In the present embodiment, as an example, the charging speed of normal charging is set to about one third of the charging speed of rapid charging, but any speed may be used regardless of that. It may be variable according to the power supply state.

As described above, by performing charge control (control of the charge rate) to the storage battery while monitoring the power supply state before a power outage of the power system occurs, the power supply state becomes unstable as shown in FIG. If it judges, a base station apparatus will be in charge standby, and the fall of the power stability of electric power system is prevented. Thereby, the base station control device 101 of each base station can charge the storage battery while avoiding a power failure of the power system.

FIG. 3 is a diagram showing another base station apparatus 132 of the present invention. The base station control device 101 of FIG. 2 is replaced with a base station control device 301 to control the load equipment 305 further. Power demand information such as power consumption, communication volume, and importance is sent from the load facility 305 to the control unit 303. When the stability of the power system is insufficient only with the charge control to the storage battery 204, the control unit 303 of the base station device control device 301 transfers the load equipment 305 from the normal operation mode to the low power operation mode, Prevent power outages. In the case of the base station apparatus, for example, by limiting the communication speed and communication area of the load equipment 305, the mode shifts to the low power operation mode to reduce power consumption. The power state detection unit 202 and the storage battery 204 may be the same as or different from FIG.

As a result, in an environment of power infrastructure with unstable system power, stability to the load facility 305 can be reduced while avoiding power failure by using power status information, power demand information, and storage information to avoid power failure. Power can be supplied.

Second Embodiment
FIG. 4 is a diagram showing a base station storage system of the present invention. Compared with the first embodiment, inter-base station control apparatus 401 controls inter-base station apparatuses.

FIG. 5 is a diagram showing an inter-base station controller 401 according to the present invention. The inter-base station apparatus control apparatus 401 includes a system monitoring unit 502 that uses power supply information such as power load information from a power supply company or planned power transmission information (or power failure information), and a plurality of base station apparatus control apparatuses described later. And a transmission unit 506 for transmitting control information to the base station control device. Transmission and reception may be wireless, wired, dedicated, or shared. The control unit 503 generates control information for performing charge control of the storage battery of each base station apparatus from the power load information from the power supply company, the power supply information, and the information from the plurality of base station apparatus control devices.

FIG. 6 is a diagram showing a base station apparatus 162 in communication with the inter-base station apparatus control apparatus 401 of the present invention. The base station apparatus 162 includes a transmitting unit 606 and a receiving unit 607 as compared to the base station apparatus control device 301 in FIG. 3. The power state detection unit 202, the storage battery 204, and the load facility 305 may be the same as or different from FIG. The power generation facility 208 does not necessarily have to be provided side by side, and illustration of transmission and reception signals with the power generation facility 208 is omitted.

A power condition detection unit 202 (for example, a smart meter) for monitoring the power usage condition (frequency, voltage, current) is provided in each load facility 305 connected to the power system, and the inter-base station control device 401 The power state information may be received from the transmission unit 606 of 162, and the load state of the entire system power may be determined based on the information.

The control unit 603 is power state information such as the frequency, voltage, and current of the power system of the power state detection unit 202, storage information such as the storage amount of the storage battery 204, power consumption of the load facility 305, communication amount, importance, etc. The power demand information is transmitted to the inter-base station control device 401 by the transmission unit 606. The control unit 603 performs charge control of the storage battery 204 based on the control information from the inter-base station control device 401 received by the receiving unit 607.

When it is determined by the power state detection unit 202 that the power supply has become unstable and the power stability has deteriorated, priority is given to control information from the inter-base station control device 401 to charge the storage battery 204 from quick charging. The normal charging may be performed or the charging may be stopped.

Alternatively, by shifting the load equipment 305 from the normal operation mode to the low power operation mode, power failure of the power system is prevented. In the case of the base station apparatus, for example, power consumption is reduced by shifting the load equipment 305 to a low power operation mode that limits the communication speed and communication area. As a result, the load on the power system can be reduced promptly, so that a power failure of the power system can be avoided. The control of the storage battery 204 and the load facility 305 may be used in combination.

The control unit 503 of the inter-base station control device 401 can charge the plurality of base station devices that need to be charged in order to perform charge control of the storage battery of each base station device so that the power system does not lose power. If it can not be expected, it is necessary to decide which base station apparatus's storage battery should be charged. That is, in consideration of the power supply stability of the entire power network configured of a base station unit or a plurality of power grids, the charging priority is determined on a power grid basis.

The information to determine the priority is as follows.

1) Storage capacity of storage battery · · · · · Priority is given to storage batteries with a small remaining amount.

2) Power consumption of load facility ··· For example, in the case of a base station apparatus, priority is given to a load facility with large power consumption such as communication volume.

3) Remaining operating capacity ... (1) Determine the priority from the remaining capacity of the storage battery and (2) the remaining operating time calculated from the power consumption of the load facility.

4) Temperature · · · Li-ion battery has poor charge efficiency at low temperature and high temperature, lower the priority of the battery of Li-ion batteries unsuitable temperature conditions.

5) State of power generation facility · · · · · · · If the storage battery is a hybrid system that can switch between grid power and power generation facility, determine the priority from the power generation information of the power generation facility. For example, in the case of diesel power generation, priority is given to a storage battery with a small amount of remaining diesel fuel. In the case of solar power generation, the priority is determined based on the amount of power generation and the weather.

6) System type (Good-Grid, Average-Grid, Poor-Grid, Off-Grid etc.) ・・・ Priority from information on stability of power supply per power system (eg average power supply time per day) Decide. For example, priority is given to areas where power supply is unstable (Poor-Grid).

7) Installation location of storage battery · · · · · Adjacent base station devices on the power system should not be powered at the same time.

These pieces of information may be combined to determine the priority.

As described above, the inter-base station apparatus control apparatus controls the power network or the base station apparatus connected to the power system to connect to a base station apparatus that requires more operation while avoiding a power outage of the power system. By charging the storage battery, operation stop can be avoided.

The control roles of the inter-base station apparatus control apparatus and the base station apparatus control apparatus are an example and not limited to this. For example, each base station apparatus may control only the signal received from the inter-base-station control apparatus without determining the control content at all.

Although it can be used for charge control to a base station apparatus connected to the power system, it can be applied to equipment connected to the power system that wants to avoid an operation stop.

100 power station 101 base station control device 102

base station devices

103, 104, 105, 106, 107, 108 power system 110 substation 202 power state detection unit 203 control unit 204 storage battery 205 load facility 208 power generation facility 301 base station control Device 303 Control unit 305 Load equipment 401 Inter-base station control device 502 System monitoring unit 503 Control unit 506 Transmission unit 507 Reception unit 603 Control unit 606 Transmission unit 607 Reception unit

Claims

A charge control method of a storage battery provided in parallel to a base station device in a system for controlling a plurality of base station devices connected to a power system, the method comprising:
The base station apparatus comprises load equipment and a base station apparatus control apparatus.
A charge control method, comprising: performing charge control of the storage battery based on power state information of the power system, power demand information of the load facility, and storage information of the storage battery.
The charge control method according to claim 1, wherein when the power stability of the power system is deteriorated, the charge speed is lowered or the charge is temporarily stopped.
The charge control method according to claim 1, wherein a charge priority is determined for each of the power systems based on power supply information of the power system, power demand information of the load equipment, and storage information of the storage battery.
The charge control method according to claim 1, wherein a charge priority is determined for each of the base station devices based on power supply information of the power system, power demand information of the base station devices, and storage information of the storage battery. .
The charge control method according to claim 1, wherein the control of the load facility is performed based on the power state information, the power demand information, and the storage information.
The charge control method according to claim 1, further comprising a power generation facility to perform power generation control.
7. The charge control method according to claim 6, wherein power generation is controlled based on power generation information.
The charge control method according to claim 1, wherein the load equipment is operated by the storage battery at the time of a power failure.
The charge control method according to claim 1, further comprising performing charge control of the storage battery based on power supply information of the power system.
The charge control method according to claim 3, wherein the power supply information is planned power failure information.
The charge control method according to claim 1, wherein the power demand information of the load facility includes one of power consumption, communication amount, and importance.
The charge control method according to claim 1, wherein the storage information of the storage battery is a storage amount and a battery temperature.
4. The charge control method according to claim 3, wherein the power supply information is at least one of a frequency of the power system, a voltage, and a power supply information current.
2. The charge control method according to claim 1, wherein the control of the load equipment is at least one of communication speed limitation and communication area limitation.
The charge control method according to claim 7, wherein the power generation information is at least one of a power generation amount, fuel, and weather.
A system for controlling a plurality of base station devices connected to a power system, the system comprising:
The base station apparatus includes a load facility and a base station apparatus control apparatus, and a storage battery is provided side by side.
A system for controlling a base station apparatus characterized in that charge control of the storage battery is performed based on power state information of the power system, power demand information of the load equipment, and storage information of the storage battery.
The system for controlling a base station apparatus according to claim 16, wherein when the power stability of the power system is deteriorated, the charging speed is lowered or the charging is temporarily stopped.
The system according to claim 16, further comprising: charge control of the storage battery based on power supply information of a power system.
The system according to claim 18, wherein the power supply information is planned power failure information.
The system for controlling a base station apparatus according to claim 16, wherein the power demand information of the load equipment includes any of power consumption, communication amount, and importance.
The system according to claim 16, wherein the storage information of the storage battery is a storage amount and a battery temperature.
The system according to claim 18, wherein the power supply information is at least one of a frequency, a voltage, and a current of the power system.
The system according to claim 16, wherein the control of the load equipment is at least one of communication speed limitation and communication area limitation.
The system for controlling a base station apparatus according to claim 16, comprising a power generation facility and performing power generation control.
The system for controlling a base station apparatus according to claim 24, wherein power generation control is performed based on power generation information.
The system according to claim 25, wherein the power generation information is at least one of power generation amount, fuel, and weather.
The base station apparatus connected to the system which controls the base station apparatus of Claim 16.
A base station controller connected via a communication line to an inter-base station controller that controls a plurality of base stations connected to a power system, the controller comprising:
The base station apparatus includes a load facility and a base station apparatus control apparatus, and a storage battery is provided side by side.
A receiving unit that receives control information generated in the inter-base station control device based on the power state information of the power system, the power demand information of the load facility, and the storage information of the storage battery; A base station control device performs charge control of the storage battery based on the control information.
The base station control device according to claim 28, wherein when the power stability of the power system is deteriorated, the charging speed is lowered or the charging is temporarily stopped.
The base station control device according to claim 28, wherein charge control of the storage battery is further performed based on power supply information of the power system.
29. A base station control apparatus for controlling a base station apparatus according to claim 28, further comprising a power generation facility to perform power generation control.
The base station control apparatus for controlling a base station apparatus according to claim 31, wherein power generation control is performed based on the power generation information.
The base station control device according to claim 28, wherein the power supply information is planned power failure information.
The base station control device according to claim 28, wherein the power demand information of the load equipment includes any of power consumption, communication amount, and importance.
The base station control device according to claim 28, wherein the storage information of the storage battery is a storage amount and a battery temperature.
The base station control device according to claim 32, wherein the power supply information is at least one of a power system frequency, a voltage, and a current.
The base station control device according to claim 28, wherein the control of the load equipment is at least one of communication speed limitation and communication area limitation.
The base station control device according to claim 30, wherein the power generation information is at least one of a power generation amount, a fuel, and a weather.
A charging control method of a storage battery provided in parallel to a base station apparatus connected to a power system, the method comprising:
The base station apparatus includes a load facility and a base station apparatus control apparatus, and a storage battery is provided side by side.
A charge control method, comprising: performing charge control of the storage battery based on power state information of the power system, power demand information of the load facility, and storage information of the storage battery.
40. The charge control method according to claim 39, wherein, when the power stability of the power system is deteriorated, the charge speed is lowered or the charge is temporarily stopped.
40. The charge control method according to claim 39, wherein the control of the load facility is performed based on the power state information, the power demand information, and the storage information.
40. A charge control method according to claim 39, comprising power generation equipment to perform power generation control.
43. A charge control method according to claim 42, wherein power generation is controlled based on power generation information.
40. The charge control method according to claim 39, wherein the load equipment is operated by the storage battery at the time of a power failure.
40. The charge control method according to claim 39, wherein the power demand information of the load facility includes any one of power consumption, communication amount and importance.
The charge control method according to claim 39, wherein the storage information of the storage battery is a storage amount, a battery temperature.
40. The charge control method according to claim 39, wherein the control of the load equipment is at least one of communication speed limitation and communication area limitation.
The charge control method according to claim 43, wherein the power generation information is at least one of a power generation amount, a fuel, and a weather.
A base station apparatus additionally provided with a storage battery connected to a power system,
The base station apparatus includes a load facility and a base station apparatus control apparatus, and a storage battery is provided side by side.
A base station apparatus performing charge control of the storage battery based on power state information of the power system, power demand information of the load facility, and storage information of the storage battery.
The base station apparatus according to claim 49, wherein if the power stability of the power system is degraded, the charging speed is lowered or the charging is temporarily stopped.
The base station apparatus according to claim 49, wherein the control of the load equipment is performed based on the power state information, the power demand information, and the storage information.
The base station apparatus according to claim 49, comprising a power generation facility and performing power generation control.
The base station apparatus according to claim 52, wherein power generation control is performed based on power generation information.
The base station apparatus according to claim 49, wherein the load equipment is operated by the storage battery at the time of a power failure.
The base station apparatus according to claim 49, wherein the power demand information of the load equipment includes one of power consumption, communication amount, and importance.
The base station apparatus according to claim 49, wherein the storage information of the storage battery is a storage amount, a battery temperature.
The base station apparatus according to claim 49, wherein the control of the load equipment is at least one of communication speed limitation and communication area limitation.
The base station apparatus according to claim 53, wherein the power generation information is at least one of a power generation amount, a fuel, and a weather.