JP7139687B2 - Monitoring system - Google Patents

Description

The present invention relates to surveillance systems.

In order to be able to check (grasp) the operating state of the power storage system using a smartphone or the like, information on the operating state of the power storage system (remaining power storage amount, etc.) is collected by a management server on the Internet.

JP-A-2000-076033 JP 2007-221565 A

When the power storage system is used alone, the operating state of the power storage system can be grasped only from the information from the power storage system. It is preferable to be able to grasp the operating state of the system (mainly whether there is an abnormality). When information about the operating state can be obtained from the power generation system, it is possible to diagnose whether there is an abnormality in the power generation system based on the information. Therefore, it is possible to accurately grasp the operating state of the power storage system, but if the power generation system is made by another company, or if the power generation system does not have a function to output information on the operating state to an external device. In general, it is not possible to obtain information about operating conditions from the power generation system.

SUMMARY OF THE INVENTION The present invention has been devised in view of the above circumstances, and provides a monitoring system capable of diagnosing whether or not there is an abnormality in a power generation system connected to the same power receiving point as a power storage system without obtaining any information from the power generation system. for the purpose.

A monitoring system according to an aspect of the present invention includes a management server, and an index value of reverse power flow power amount in a predetermined time period from a power receiving point of an electricity storage system. a transmitting device that transmits data to a server, wherein the management server diagnoses whether there is an abnormality in the power generation system connected to the power receiving point based on the plurality of latest index values received from the transmitting device. Equipped with diagnostic means.

In other words, a decrease in the reverse flow power amount occurs even when the power generation amount decreases, but the reverse power flow power amount has been continuously decreasing for a predetermined period (a period in which multiple index values are obtained). In this case, it can be diagnosed (determined) that a problem has occurred in the power generation system. Therefore, according to the monitoring system configured as described above, it is possible to diagnose the presence or absence of an abnormality in the power generation system connected to the same power receiving point as the power storage system without obtaining any information from the power generation system.

The diagnostic means of the management server may diagnose that there is an abnormality in the power generation system when the reverse flow power amounts indicated by the latest first predetermined number of index values are all "0". It may be diagnosed that there is an abnormality in the power generation system when the reverse flow power amount indicated by the second predetermined number of index values is equal to or less than a predetermined amount. Further, when the power generation system includes a DC power generator and a power conditioner that converts the DC power from the DC power generator into AC power, the diagnosis means of the management server may detect the latest first predetermined number of the indicators If the reverse flow power amount indicated by the value is
If it is 0", it is diagnosed that there is an abnormality in the power conditioner of the power generation system including the DC power generator and a power conditioner that converts the DC power from the DC power generator to AC power. When the reverse power flow power amount indicated by the second predetermined number of index values is equal to or less than a predetermined amount, it may be diagnosed that there is an abnormality in the DC generator of the power generation system.

The diagnostic means of the management server may, when diagnosing that there is an abnormality in the power generation system, perform notification processing for notifying a user of the power storage system of the fact.

ADVANTAGE OF THE INVENTION According to this invention, the presence or absence of abnormality of the electric power generation system connected to the same power receiving point as an electrical storage system can be diagnosed, without obtaining any information from the said electric power generation system.

FIG. 1 is an explanatory diagram of the schematic configuration and usage of a monitoring system according to one embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a monitoring device that is a component of the monitoring system. FIG. 3 is a flowchart of reverse tide value information transmission processing performed by the control unit of the monitoring device. FIG. 4 : is a flowchart of the reverse tide value information analysis process which a management apparatus performs.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, an outline of a monitoring system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is an explanatory diagram of a schematic configuration and usage pattern of a monitoring system according to an embodiment, and FIG. 2 is a schematic configuration diagram of a monitoring device 20 that is a component of the monitoring system.

As shown in FIG. 1, the monitoring system according to the present embodiment includes a management server 10, a power storage system 30 combined with a power generation system 40 that sells power, and a monitoring device 20. FIG. Note that "combined with the power generation system 40" means "connected to the power receiving point 55 to which the power generation system 40 is connected". In addition, one power storage system 30 and one monitoring device 20 are shown in FIG. It is built as a system that includes

The power storage system 30 is a system in which a storage battery 31 is connected to a storage battery power conditioner (hereinafter referred to as a storage battery PCS) 32 that controls charging and discharging of the storage battery 31 . The storage battery PCS 32 that constitutes the storage battery system 30 controls the storage battery 31 so that the power stored in the storage battery 31 does not reverse flow (is not sold) based on the output of the current sensor 35 for detecting the reverse flow current. have a function. The storage battery PCS 32 also has the following functions.

A state value detection function that detects various state values representing the operating state of the self-storage system 30 (residual storage amount of the storage battery 31 and reverse power flow power amount). An error detection function that detects an error that has occurred. An information output function that returns information requested by the monitoring device 20 connected by the communication cable 26 to the monitoring device 20. Note that the information output function of the storage battery PCS 32 allows The information that can be provided includes the state value detected by the state value detection function, status information indicating the current state (normal, error occurring) of the power storage system 30, the device ID assigned to the self-storage battery PCS 32, and the like. be.

The power generation system 40 combined with the power storage system 30 may be any system that sells power. However, in the following description, the power generation system 40 is a solar power generation system that combines a solar cell array 41 (hereinafter referred to as PV 41) and a PV power conditioner (hereinafter referred to as PV PCS) 42. Suppose there is

The management server 10 is a W system having a large-capacity nonvolatile storage device (hard disk, etc.), a control unit centered on a processor, and a NIC (Network Interface Card) as main components.
eb server. The management server 10 includes a power storage system management database 12 for storing various information transmitted from the monitoring device 20 for each power storage system 30 for each power storage system 30 . This power storage system management database 12 (hereinafter also referred to as management DB 12) also stores information (e-mail address, login information) on users (owners, etc.) of each power storage system 30, and the management server 10 , based on the information in the management DB 12, performs a process of providing each user with a web page on which the operation status of the power storage system 30 can be checked, and a process of notifying each user of the occurrence of an error by e-mail.

The monitoring device 20 is a device for notifying the user and the management server 10 of the operating state of the power storage system 30 . As shown in FIG. 2, the monitoring device 20 includes a LCD (Liquid Crystal
Display) 21 , control unit 22 , NIC 23 , and operation unit 24 .

The NIC 23 is an interface circuit for communicating with the management server 10 . Monitoring device 20 is typically connected to the Internet via router 15 .

The operating section 24 is a unit having a plurality of push button switches. The control unit 22 is a unit that combines a processor (CPU, microcontroller, etc.) and its peripheral circuits. The control unit 22 operates as follows based on the set program and information (such as the address of the management server 10).

When the power is turned on, the control unit 22 grasps the device ID of the storage battery PCS 32 (hereinafter, referred to as own device ID) by communicating with the connected storage battery PCS 32 . The control unit 22 then transitions to the normal state.

The control unit 22, which has shifted to the normal state, receives a display instruction of various information (remaining charge amount, charge/discharge amount, occurring error, etc.) from the user through the operation of the operation unit 24. FIG. When receiving an instruction to display certain information, the control unit 22 acquires the information from the storage battery PCS 32 and displays it on the LCD 21 .

In addition, the control unit 22 that has shifted to the normal state periodically acquires the status information, the remaining power amount, and the charge/discharge amount from the storage battery PCS 32 and enters a state of transmitting the acquired information to the management server 10 .

Hereinafter, the configuration and operation of the monitoring system according to this embodiment will be described more specifically.

As described above, the monitoring device 20 (control unit 22) can acquire information about the operating state of the power storage system 30 by communicating with the storage battery PCS 32. FIG. However, the monitoring device 20 is not configured to be communicable with the PV PCS 42 (see FIG. 1). Therefore, the monitoring device 20 cannot acquire information about the operating state from the PV PCS 42, but in order to accurately grasp the operating state of the power storage system 30, the power generation system 40
It is better to know the operating state of

In order to be able to grasp the operation state of the power generation system 40, the control unit 22 of the monitoring system according to the present embodiment has the reverse current value of the procedure shown in FIG. A function to perform information transmission processing is provided. Further, the management server 10 is provided with a function of performing reverse tide value information analysis processing in the procedure shown in FIG. 4 when reverse tide value information (details will be described later) is received.

That is, as shown in FIG. 3, the control unit 22 acquires the reverse current value from the storage battery PCS 32 at a predetermined time every day (step S101). Here, the reverse power value is an index value of the amount of power that reversely flows into the system within a predetermined period of time. The reverse flow value may be the reverse flow power amount itself or the reverse flow current value as long as the reverse flow power amount within a predetermined time is known. Further, the process of step S101 may be a process of acquiring an already measured value from the storage battery PCS or a process of causing the storage battery PCS to newly measure the reverse flow value.

The control unit 22 that has finished the process of step S101 transmits reverse current value information in a predetermined format in which the acquired reverse current value and its own device ID are set to the management server 10 using the NIC 23 (step S102).

The management server 10 that has received the reverse current value information starts the reverse current value information analysis process (FIG. 4), and first grasps the reverse current value and the device ID set in the received reverse current value information (step S201). Next, the management server 10 reads the first count value and the second count value associated with the grasped device ID (hereinafter referred to as the target device ID) from the management DB 12 onto the memory (step S202). The initial values of the first count value and the second count value in the management DB 12 (the values at the start of operation of the monitoring device 20) are both "0".

After that, the management server 10 determines whether or not the reverse current value is equal to or less than the prescribed value (step S203). Here, the specified value is a value set in advance as a threshold for determining that the PV 41 in the power generation system 40 may have a problem. This specified value may be a value stored in the management DB 12 for each power generation system 40 or a value set in the management server 10 and used in common for all power generation systems 40 .

If the reverse flow value is not equal to or less than the specified value (step S203; NO), the management server 10 changes the first count value and the second count value associated with the device-of-interest ID in the management DB 12 to " 0" is cleared (step S221). The management server 10 also diagnoses that there is no abnormality in the "power generation system 40 combined with the power storage system 30 having the device of interest ID" (hereinafter referred to as the power generation system of interest 40) (step S222). Then, the management server 10 returns the diagnosis result information in which the diagnosis result is set to the source monitoring device 20 of the reverse tide value information received this time (step S209), and then ends this reverse tide value information analysis processing. .

On the other hand, if the reverse current value is equal to or less than the specified value (step S203; YES), the management server 10 determines whether the reverse current value is "0" (step S204). Then, if the reverse flow value is not "0" (step S204; NO), the management server 10 adds "1" to the first count value (step S205). The process of step S205 is a process of adding "1" to each of the first count value on the memory and the first count value associated with the device-of-interest ID in the management DB 12 .

The management server 10 that has completed the process of step S205 determines whether or not the first count value is equal to or greater than a preset first threshold value (for example, "3") (step S206). Then, if the first count value is less than the first threshold value, the management server 10 (step S206; N
In O), after performing the same processing (processing of steps S222 and S209) as when the reverse tide value is not equal to or less than the specified value, this reverse tide value information analysis processing is terminated.

On the other hand, if the first count value is greater than or equal to the first threshold value (step S206; YES), the management server 10 diagnoses that the PV 41 of the power generation system of interest 40 has an abnormality (step S207). Next, the management server 10 associates the diagnosis result and the diagnosis date with the device-of-interest ID and stores them in the management DB 12 (step S208). If the management DB 12 stores a diagnostic result indicating that the PV 41 or PV PCS 42 of the power generation system 40 has an abnormality in association with a certain device ID, the management server 10 stores the device ID. A message to the effect that there is an abnormality in the PV 41 or PV PCS 42 of the power generation system 40 is displayed on the web page for checking the operation status of the power storage system 30 .

The management server 10 that has finished the process of step S208 returns the diagnosis result information in which the diagnosis result is set to the reverse tide value information transmission source monitoring device 20 that has received this time (step S209), and then this reverse tide value information End analysis processing.

When the reverse current value is "0" (step S204; YES), the management server 10 adds "1" to each of the first count value and the second count value (step S231). . In the process of step S231, "1" is also added to each count value associated with the device-of-interest ID in the management DB 12, similarly to the process of step S205.

The management server 10 that has completed the process of step S231 determines whether or not the second count value is equal to or greater than a preset second threshold value (for example, "3") (step S232). Then, when the second count value is less than the second threshold value (step S232; NO), the management server 10 performs the already-described processing from step S206 onward.

If the second count value is equal to or greater than the second threshold value (step S232; YES), the management server 10 diagnoses that the PV PCS 42 of the power generation system of interest 40 has an abnormality (step S233). After performing the processes of steps S208 and S209, the management server 10 ends the reverse tide value information analysis process for the reverse tide value information received this time.

It returns to FIG. 3 and continues description of reverse tide value information transmission processing.
As is clear from the content of the above-described reverse tide value information analysis processing (FIG. 4), diagnosis result information is transmitted from the management server 10 when the processing of step S102 is performed. After receiving this diagnostic result information (step S104), the control unit 22 determines whether or not the received diagnostic result information is information indicating that there is an abnormality in the power generation system 40 (PV 41 or PV PCS 42). (step S105).

Then, if the diagnostic result information does not indicate that the power generation system 40 has an abnormality (step S105; NO), the control unit 22 performs this reverse tide value information transmission process without performing any particular process. finish. Further, when the diagnosis result information indicates that there is an abnormality in the power generation system 40 (step S105; YES), the control unit 22 sends the PV 41 or the PV PCS 42 according to the received diagnosis result information. After displaying a message to the effect that there is an abnormality on the LCD 21, this reverse tide value information transmission process is terminated.

As described above, the monitoring device 20 of the monitoring system according to the present embodiment acquires, from the power storage system 30, the index value of the reverse power flow amount in a predetermined time period from the power receiving point 55 of the power storage system 30 every day. to the management server 10 via the Internet. In addition, the management server 10 of the monitoring system checks whether there is an abnormality in the power generation system 40 connected to the power receiving point 55 based on the latest multiple index values (first or second threshold values) received from the monitoring device 20. It has the function of diagnosing. A decrease in the reverse flow power amount occurs even if the power generation amount decreases, but the reverse power flow power amount has been continuously decreasing for a predetermined period (a period in which a plurality of index values are obtained). In this case, it can be diagnosed (determined) that a problem has occurred in the power generation system 40 . Therefore, according to the monitoring system according to the present embodiment, it is possible to diagnose whether or not there is an abnormality in the power generation system 40 connected to the same power receiving point as the power storage system 30 without obtaining any information from the power generation system 40 . As a result, according to the monitoring system according to the present embodiment, it is possible to determine the operating state of the power storage system 30 more accurately.

<<Modification>>
The monitoring system according to the embodiment described above can be modified in various ways. For example, the management server 10 may be modified into a device that determines that an abnormality has occurred in the power generation system 40 only when the reverse current value=0 or when the reverse current value≦the specified value continues. Further, when the intensity of sunlight near the PV 41 is known, the management server 10 or the monitoring device 20 may determine the prescribed value from the intensity of sunlight and the power normally generated by the PV 41 .

<<Note>>
a management server (10);
A transmission device (20) that acquires from the power storage system (30) an index value of reverse flow power amount in a predetermined time period from a power receiving point of the power storage system (30) every day and transmits it to the management server (10) via the Internet. When,
including
The management server (10)
Diagnosis means for diagnosing whether there is an abnormality in the power generation system connected to the power receiving point based on the latest plurality of the index values received from the transmitting device;
comprising
A surveillance system characterized by:

10 Management Device 12 Power Storage System Management Database 15 Router 20 Monitoring Device 21 LCD
22 control unit 23 NIC
24 operation unit 26 communication cable 30 power storage system 31 storage battery 32 storage battery power conditioner 35 current sensor 40 power generation system 41 solar cell array 42 PV power conditioner 55 power receiving point

Claims (4)

a management server;
a transmitting device that acquires from the power storage system, every day, an index value of the amount of reverse power flow in a predetermined time period from a power receiving point of the power storage system and transmits the index value to the management server via the Internet;
including
The management server is
Diagnosis means for diagnosing whether there is an abnormality in the power generation system connected to the power receiving point based on the latest plurality of the index values received from the transmitting device;
with
The diagnosis means of the management server diagnoses that there is an abnormality in the power generation system when the reverse flow power amounts indicated by the latest first predetermined number of the index values are all "0".
A surveillance system characterized by: a management server;
a transmitting device that acquires from the power storage system, every day, an index value of the amount of reverse power flow in a predetermined time period from a power receiving point of the power storage system and transmits the index value to the management server via the Internet;
including
The management server is
Diagnosis means for diagnosing whether there is an abnormality in the power generation system connected to the power receiving point based on the latest plurality of the index values received from the transmitting device;
with
The diagnostic means of the management server diagnoses that there is an abnormality in the power generation system when the reverse power flow power amount indicated by the latest second predetermined number of the index values is equal to or less than a predetermined amount.
A surveillance system characterized by: a management server;
a transmitting device that acquires from the power storage system, every day, an index value of the amount of reverse power flow in a predetermined time period from a power receiving point of the power storage system and transmits the index value to the management server via the Internet;
including
The management server is
Diagnosis means for diagnosing whether there is an abnormality in the power generation system connected to the power receiving point based on the plurality of latest index values received from the transmitting device;
with
The power generation system includes a DC power generator and a power conditioner that converts DC power from the DC power generator to AC power,
The diagnostic means of the management server determines that there is an abnormality in the power conditioner of the power generation system when the reverse flow power amounts indicated by the latest first predetermined number of index values are all "0". Diagnose, and diagnose that there is an abnormality in the DC power generator of the power generation system when the reverse power flow power amount indicated by the latest second predetermined number of the index values is equal to or less than a predetermined amount.
A surveillance system characterized by: When the diagnosis means of the management server diagnoses that there is an abnormality in the power generation system, the diagnosis means performs notification processing for notifying a user of the power storage system of the fact.
The monitoring system according to any one of claims 1 to 3 , characterized in that:

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