JP2014236602A - Multiple purpose controller, multiple purpose control system and program of multiple storage batteries - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple purpose controller, multiple purpose control system and program which allow for utilization of multiple storage batteries for system for multiple purposes of use.SOLUTION: A multiple purpose controller includes a storage battery performance acquisition unit 101 for acquiring data on the performance of multiple storage batteries 3a, 3b, 3c, a required performance acquisition unit 103 for acquiring data on the performance required for achieving multiple purposes, a required performance assignment unit 105 for assigning the performance required for multiple purposes to the multiple storage batteries 3a, 3b, 3c, based on the data on the performance thereof and the data on the required performance, a control command value generation unit 106 for generating a control command value required for each of the multiple purposes, and a control command value output unit 107 for outputting a control command value to each storage battery depending on the required performance thus assigned.

Description

  Embodiments described herein relate generally to a multi-purpose control device, a multi-purpose control system, and a program that make it possible to utilize a plurality of storage batteries for a system for a multi-purpose application.

  In recent years, the introduction of renewable energy such as solar power generation (hereinafter referred to as “PV”) and wind power generation has been actively promoted in each country. Since PV power generation output fluctuates according to time, season, and weather, supply and demand adjustment is required to introduce a large amount of solar power generation equipment. Utilization of storage batteries is expected as a means for realizing this supply and demand adjustment. The storage battery can be used for various purposes such as load leveling, system stabilization control, and emergency power supply in the event of a disaster, but the problem is high cost.

  As a method for effectively using the storage battery, a peak shift control method considering the life of the storage battery and a fluctuation suppression control method with a small required battery capacity have been proposed. In addition, proposals have been made regarding a control method for determining the storage amount of the previous day based on PV power generation amount prediction and a method for controlling a plurality of storage batteries as if they were one storage battery.

  These methods are methods aimed at reducing the specifications of a storage battery necessary for obtaining a specific effect. On the other hand, as an approach for effectively using the storage battery, it is conceivable to maximize the effect obtained from the storage battery of a certain specification. For example, a method of maximizing the effect obtained by using one battery for a plurality of purposes.

JP 2003-244840 A JP 2008-295208 A JP 2004-32989 A JP 2012-205490 A

  In the future, when the spread of storage batteries further progresses, it is expected that a plurality of storage batteries will be required for a plurality of purposes as a further effective utilization method of storage batteries.

  An object of the present invention is to provide a multi-purpose control device, a multi-purpose control system, and a program that can utilize a plurality of storage batteries for a system for a multi-purpose application.

  In order to achieve the above-described object, a multi-purpose battery multi-purpose control device according to an embodiment of the present invention is necessary for achieving a plurality of storage battery performance acquisition units that acquire data related to the performance of a plurality of storage batteries. A required performance acquisition unit that acquires data related to required performance; a required performance allocation unit that allocates required performance required for the plurality of purposes to a plurality of storage batteries based on data related to the performance of the storage battery and data related to the required performance; A control command value generation unit that generates a control command value required for each of the plurality of purposes; and a control command value output unit that outputs the control command value to each storage battery in accordance with the allocated required performance. It is characterized by.

  The system and program implemented in the above-described form are also one embodiment of the present invention.

1 is a block diagram showing an overall configuration of a system using a multipurpose control device according to an embodiment of the present invention. It is a flowchart explaining the processing operation of the multipurpose control apparatus of this embodiment. It is a table | surface which shows an example of the data preserve | saved at the storage battery performance data holding | maintenance part of the multipurpose control apparatus of this embodiment. It is a table | surface which shows an example of the data preserve | saved at the required performance data holding | maintenance part of the multipurpose control apparatus of this embodiment. In this embodiment, it is a table | surface which shows an example which allocated the some performance requested | required to the some storage battery according to time. In this embodiment, it is a table | surface which shows an example of the allocation result which satisfied the required performance required for all the objectives.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

(System configuration)
FIG. 1 is a block diagram showing the overall configuration of a system using a multipurpose control apparatus according to an embodiment of the present invention.

  This system includes a multipurpose control device 1, an input device 2 for inputting storage battery performance and required performance, a plurality of storage batteries 3a, 3b, 3c to be controlled, a solar power generation device 4, and a plurality of power loads 5a. , 5b and a measuring device 6 for measuring the system state of the connection destination.

  The multipurpose control device 1 includes a storage battery performance data acquisition unit 101 that acquires storage battery performance data from an external input device 2, a storage battery performance data holding unit 102 that stores the acquired data, and a plurality of purposes from the external input device 2. Required performance acquisition unit 103 for acquiring required performance data required for the request, a required performance data holding unit 104 for storing the acquired data, and a request for assigning the performance of storage batteries necessary to achieve a plurality of purposes to individual storage batteries The performance allocation unit 105, the control command value generation unit 106 that generates control command values necessary for each of a plurality of purposes, and the control command value generated by the control command value generation unit 106 to the storage battery allocated by the required performance allocation unit 105 And a control command value output unit 107 for outputting.

  The input device 2 may be a computer assuming that an operator or the like sets information, or may be an upper energy management device.

  The measuring device 6 is a device that measures information (for example, power, voltage, current, frequency, and the like) of a connection destination system state for charging and discharging power.

(Processing operation of multi-purpose control device 1)
FIG. 2 is a flowchart for explaining the processing operation of the multipurpose control apparatus 1 of FIG. The processing operation will be described below with reference to FIG.

(Input and storage of performance of each storage battery)
First, when data related to the performance of each storage battery (hereinafter referred to as “storage battery performance data”) is input from the input device 2, the storage battery performance acquisition unit 101 of the multipurpose control device 1 acquires the storage battery performance data, This data is stored in the storage battery performance data holding unit 102 (step S1). Examples of the storage battery performance data include rated output [kW], rated capacity [kWh], initial charged amount [kWh], and the like. For example, as shown in FIG. 3, the storage battery performance data is divided into a rated output [kW], a rated capacity [kWh], and an initial charged amount [kWh] for each of the storage batteries 3a, 3b, and 3c. Saved. In addition to the storage battery performance data, the storage battery performance data holding unit 102 may store an index for determining the priority order of a plurality of storage batteries, for example, the cost and the degree of deterioration.

(Input and storage of performance required for each purpose achieved by storage battery)
Next, when data related to performance required for each purpose achieved by each storage battery is input from the input device 2 (hereinafter referred to as “required performance data”), the required performance acquisition unit 103 inputs the required performance data. Acquired from the device 2 and stores the data in the required performance data holding unit 104 (step S2).

  The objectives achieved by each storage battery are: (1) the objective that depends on the output (W), (2) the objective that requires systematic charge / discharge depending on the capacity (Wh), and (3) the objective that depends on the capacity (Wh). However, it can be roughly divided into three purposes for securing the capacity for a certain period.

  Examples of the purpose depending on the output (W) of (1) include operation reserve securing, fluctuation suppression control, supply and demand balance (frequency) control, and the like. Examples of the purpose of (2) depending on the capacity (Wh) that requires planned charge / discharge include peak cut (shift) control, voltage rise suppression control, and the like. The purpose of securing the capacity for a certain period of time depending on the capacity (Wh) of (3) is, for example, power failure countermeasures.

  FIG. 4 shows an example of required performance data stored in the required performance data holding unit 104. In this example, five purposes of (i) power outage countermeasures, (ii) peak shift, (iii) voltage rise suppression, (iv) operating reserve, and (v) fluctuation suppression are cited as the purposes of utilizing the storage battery. . The required performance data is stored in the required performance data holding unit 104 in a format divided by time for each purpose. In addition, the SOC adjustment amount corresponding to the SOC collateral amount, which is the amount that guarantees SOC (state of charge: charge rate) for a certain period, as the required performance, and the amount to adjust the SOC by charging / discharging during a certain period of time. The output adjustment amount which is the maximum charge / discharge output required for a certain time is set. Further, the SOC adjustment amount and the output adjustment amount are set separately for charging and discharging.

  As for the power failure countermeasure, which is the first purpose, the necessary power storage capacity is always secured. In the example of FIG. 4, the SOC collateral amount is uniformly 50 kWh from 0:00 to 23:00.

  For the peak shift that is the second purpose, for example, a command for charging / discharging a specified amount may be generated according to a plan specified in advance. In the example of FIG. 4, in the SOC adjustment amount and the output adjustment amount, discharging is instructed from 0:00 to 7:00, and charging is instructed from 13:00 to 14:00, and from 18:00 to 20:00.

  As for the third purpose of voltage rise suppression, for example, a command is generated according to a plan in which charging is performed during a time period when the amount of power generated by solar power generation increases and discharging is performed at other times. In the example of FIG. 4, in the SOC adjustment amount and the output adjustment amount, discharging is instructed from 0 o'clock to 6 o'clock, from 19 o'clock to 23 o'clock, and charging is instructed from 11 o'clock to 13 o'clock.

  As for the fourth purpose of securing the operating reserve, it is only necessary to provide a margin for the output so as to always secure a proportion corresponding to the amount of power generation. In the example of FIG. 4, from 0 to 23:00, the SOC adjustment amount is instructed to discharge from 3 to 5 kWh, and the output adjustment amount is instructed to discharge from 5 to 10 kWh.

  As for the fifth object of the fluctuation suppression control, for example, there is a method of giving a moving average value of PV power generation output for a certain period of time as a command value in order to suppress fluctuation of solar power generation. In the example of FIG. 4, from 6 o'clock to 18 o'clock, the SOC adjustment amount is 5 kWh for both discharge charging and the output adjustment amount is 50 kWh for both discharge charging.

  In the example of FIG. 4, the required performance data is shown as time-series data for every hour, but a shorter time interval may be used, and a uniform request for each purpose without setting the required performance for each time. Performance may be set.

(Assignment of required performance for each purpose to each storage battery)
Furthermore, the required performance allocation unit 105 allocates the required performance for each purpose stored in the required performance data holding unit 104 to each of the plurality of storage batteries stored in the storage battery performance data holding unit 102 (step S3).

  The allocation is performed in order from the storage battery having the highest rated output within a range not exceeding the performance of each storage battery stored in the storage battery performance data holding unit 102.

  Allocation can also be performed according to priority. For example, the lower the degree of deterioration of the storage battery, the higher the priority may be, or the priority may be determined based on the rated output or the rated capacity. Or you may set a priority so that the number of the storage batteries to charge / discharge may be reduced as much as possible. Furthermore, an optimization method may be applied using these priority indices as objective functions.

  As described above, the required performance is allocated to the storage batteries 3a, 3b, and 3c so that the required performance required for all purposes is finally satisfied. If it is not possible to allocate all the requested performance within the range of the performance of the storage battery in the middle of the process (N in step S4), the process returns to step S2 to input and save the revised requested performance. The required performance reviewed in S3 is assigned to each storage battery.

  FIG. 5 shows an example in which a plurality of requested performances are assigned to a plurality of storage batteries according to time. FIG. 5 shows an example in which the batteries 3a, 3b, 3c are assigned based on the five purposes shown in FIG.

Furthermore, FIG. 6 shows an example of an allocation result that satisfies the required performance required for all purposes.
In FIG. 6, the SOC collateral amount, the SOC adjustment amount, and the output adjustment amount indicate the total values of the storage batteries 3a, 3b, and 3c, respectively.

(Generation of control command values for each purpose)
If the requested performance can be assigned within the range of the performance of the storage battery (Y in step S4), each control purpose value generation unit 106 next selects each purpose based on the measurement data obtained from the measurement device 6. A control command value necessary for achieving the above is generated (step S5).

(Output of control command value according to assigned performance requirement)
Finally, the control command value generation unit 107 outputs the control command value generated by the control command value generation unit 106 to each storage battery as an actual control command value according to the required performance allocated by the required performance allocation unit 105. (Step S6).

  Thereafter, it is determined whether the output to all the storage batteries has been completed (step S7). If the output has not been completed (N in step S7), a plurality of purposes by a plurality of storage batteries can be achieved by repeating step S5 and step S6. Realize the control method to achieve. On the other hand, when the output to all the storage batteries is completed (Y in step S7), the process is terminated.

(effect)
According to the present embodiment, by achieving a plurality of objects by a combination of a plurality of storage batteries, it is possible to operate the storage battery aiming at overall optimization, and to reduce the equipment cost.

[Other embodiments]
(1) In the above embodiment, three storage batteries 3a, 3b, and 3c have been described as examples. However, the number of storage batteries is not limited.

  (2) In the above embodiment, the five purposes are listed as the usage purposes of the storage batteries 3a, 3b, 3c. However, the number of purposes can be further increased. Other purposes include supply / demand balance control and storage battery refresh.

  (3) The various functions and processing procedures described in the above embodiments are, for example, magnetic disks (flexible disks, hard disks, etc.), optical disks (CD-ROMs, DVDs, etc.), semiconductors, etc. as programs that can be executed by a computer. It can also be stored in a recording medium such as a memory and read and executed by a processor as necessary. It is also possible to distribute the program by transmitting it from an arbitrary computer to another computer via a communication medium.

  (4) Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Multi-purpose control apparatus 2 ... Input device 3a, 3b, 3c ... Storage battery 4 ... Solar power generation device 5a, 5b ... Electric power load 6 ... Measuring device 101 ... Storage battery performance acquisition part 102 ... Storage battery performance data holding part 103 ... Required performance Acquisition unit 104 ... required performance data holding unit 105 ... required performance allocation unit 106 ... control command value generation unit 107 ... control command value output unit

Claims (5)

A storage battery performance acquisition unit for acquiring data on the performance of the plurality of storage batteries;
A required performance acquisition unit that acquires data related to required performance required to achieve multiple objectives;
Based on the data on the performance of the storage battery and the data on the required performance, a required performance allocation unit that allocates the required performance required for the plurality of purposes to the plurality of storage batteries;
A control command value generator for generating a control command value required for each of the plurality of purposes;
A control command value output unit that outputs the control command value to each storage battery according to the allocated required performance;
A multi-purpose control device for a multi-storage battery, comprising:   2. The plurality of purposes of the multiple storage battery according to claim 1, wherein the plurality of purposes include two or more of countermeasures against power failure, peak shift of power load, suppression of voltage rise, securing of operating reserve, and suppression of fluctuations in generated power. Control device.   A storage battery performance data holding unit that stores a rated output, a rated capacity, and an initial charged amount for each of the plurality of storage batteries, and a required performance data holding unit that stores data related to the charging rate of the storage battery by dividing the plurality of purposes according to time. The multipurpose control device for a multi-storage battery according to claim 1, further comprising: An input device that inputs data related to the performance of the storage battery and data related to the required performance, a plurality of storage batteries to be controlled, a photovoltaic power generation device, a plurality of power loads, and a measuring device that measures the system state of the connection destination, A multi-purpose control system for a multi-battery battery comprising a multi-purpose control device, wherein the multi-purpose control device comprises:
A storage battery performance acquisition unit for acquiring data on the performance of the plurality of storage batteries;
A required performance acquisition unit that acquires data related to required performance required to achieve multiple objectives;
Based on the data on the performance of the storage battery and the data on the required performance, a required performance allocation unit that allocates the required performance required for the plurality of purposes to the plurality of storage batteries;
A control command value generator for generating a control command value required for each of the plurality of purposes;
A control command value output unit that outputs the control command value to each storage battery according to the allocated required performance;
A multi-purpose control system for a multi-battery battery. On the computer,
A storage battery performance acquisition function for acquiring data on the performance of a plurality of storage batteries;
A required performance acquisition function that acquires data related to the required performance necessary to achieve multiple objectives;
Based on the data on the performance of the storage battery and the data on the required performance, a required performance allocation function for allocating the required performance required for the plurality of purposes to the plurality of storage batteries;
A control command value generation function for generating a control command value required for each of the plurality of purposes;
A control command value output function for outputting the control command value to each storage battery according to the allocated required performance;
A program to realize

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