JP2018121486A - Energy management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve calculation of an optimum output value with a conversion efficiency of each power converter in developing a control plan of a dispersed power supply provided at a facility of a power consumer.SOLUTION: In developing a control plan of a dispersed power supply provided at a power consumer facility, an energy management system acquires a conversion efficiency of a power converter in addition to facility information and status information of the dispersed power supply and calculates a control plan of the optimum dispersed power supply using the facility information and the status information of the dispersed power supply and the conversion efficiency of each power converter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an energy management system that performs coordinated control of distributed power sources such as storage batteries, generators, solar power generation, and wind power generation in response to power demand.

In recent years, the introduction of renewable power sources such as solar power generation and wind power generation and distributed power sources such as storage batteries has been advanced in power consumer facilities, and energy management systems for controlling them in cooperation have been developed. Also, power converters (power conditioners) such as DC / DC conversion and DC / AC conversion are used to supply power from a distributed power source to a load facility or the like.
For example, in Patent Document 1, in a case where power output from a distributed power source is converted by a power converter, when the output power is equal to or less than a fixed loss, a power control device that performs control so as not to perform power conversion is provided. Proposed.

JP 2014-217185 A

  In the power control apparatus described in Patent Document 1 described above, the distributed power source is controlled in consideration of the power converted by the power converter, but the optimum distributed type in consideration of the efficiency of the power converter. The power supply output value is not calculated.

  The present invention has been made to solve the above-described problems. In calculating the control value of each distributed power source, the optimum control value is calculated in consideration of the conversion efficiency of each power converter. It provides an energy management system that realizes highly efficient power control.

  The energy management system according to the present invention is provided in a power consumer facility to which power is supplied from an electric power company, and includes a plurality of load facilities, a distributed power source that supplies power to these load facilities, A plurality of power converters provided between each of the load facilities and the distributed power source, and a power management device for managing operations of the load facilities, the distributed power source and the plurality of power converters. In the energy management system, the power management device includes a facility information acquisition unit that acquires facility information and status information of the distributed power source, a conversion efficiency acquisition unit that acquires information of conversion efficiency of the power converter, A control plan creation unit for creating a control plan for the distributed power source based on the facility information and status information of the distributed power source and the conversion efficiency of the power converter; It is characterized in that a control command unit for calculating a control command value based on the control plan value created by our planning unit.

  According to the energy management system of the present invention, when calculating the power output from each distributed power source, a highly efficient power control is performed in order to calculate a control value that takes into account the conversion efficiency of the power converter. Is possible.

It is the schematic which shows the structure of the whole electric power supply-and-demand system including the energy management system which concerns on Embodiment 1 of this invention. It is a block diagram which shows roughly the system configuration | structure of the energy management system in Embodiment 1 of this invention. It is a figure which shows the example of the conversion efficiency of the power converter in the energy management system which concerns on Embodiment 1 of this invention. It is the schematic which shows the structure of the whole electric power supply-and-demand system containing the energy management system which concerns on Embodiment 2 of this invention. It is a block diagram which shows roughly the system configuration | structure of the energy management system in Embodiment 2 of this invention. It is the schematic which shows the structure of the whole electric power supply-and-demand system containing the energy management system which concerns on Embodiment 3 of this invention.

Embodiment 1
Hereinafter, the present invention will be described with reference to the drawings which are embodiments.
In addition, in each figure, the same code | symbol shall show the same or an equivalent part.
FIG. 1 is a schematic diagram showing the configuration of the entire power supply and demand system including the energy management system according to Embodiment 1 of the present invention.
In the figure, an electric power supply and demand system 100 includes an electric power company 1 that supplies commercial electric power such as 200 volts, and electric power consumer facilities 10 such as houses, factories, and buildings that receive electric power from the electric power company 1 and consume electric power. An energy management system is set in the electric power consumer facility 10.

Various types of load equipment 11 such as lighting, a refrigerator, and an air conditioner are provided in the electric power consumer facility 10, and electric power from the electric power company 1 is supplied to the various types of load equipment 11 through a transformer 12. . In recent years, renewable energy facilities such as a solar power generation device 13 (hereinafter referred to as PV) and a wind power generation device 14 (hereinafter referred to as WT) are provided in the power consumer facility 10. Electric power from the renewable energy facility is supplied to the various load facilities 11 through the DC / DC converters 13a and 14a and supplied to the storage battery 15 (hereinafter referred to as BAT) through the DC / DC converters 13b and 14b. Will be charged. Further, the output power of the BAT 15 is supplied to the various load facilities 11 through the DC / AC converter 15b and is charged from the power company 1 through the transformer 12 and the AC / DC converter 15a. The various devices in such a power consumer facility 10 are managed and controlled by the power management device 20, thereby forming an energy management system.
In addition, among the facilities provided in the power customer facility 10, the distributed power source including the power generation devices 13 and 14 and the BAT 15 which are renewable energy facilities handles direct current (DC) power, and the various load facilities 11 It is assumed that alternating current (AC) power is handled.

FIG. 2 shows a specific system configuration of the power management apparatus 20.
In the figure, the power management apparatus 20 includes a database 21 for storing various data and the facility information and current state of each distributed power source (PV 13, WT 14, BAT 15) recorded in the database 21 and the current state of various load facilities 11. A facility information acquisition unit 22 that acquires data indicating a state; a conversion efficiency acquisition unit 23 that acquires conversion efficiency in each power converter (13a, 14a, 13b, 14b, 15a, 15b) recorded in the database 21; Each distributed power source based on the facility information, status information, and conversion efficiency of each power converter (13a, 14a, 13b, 14b, 15a, 15b) of each distributed power source (PV13, WT14, BAT15) acquired from the database 21 A control plan creation unit 24 for creating a control plan of (PV13, WT14, BAT15); Control command values based on the control plan of the distributed power source (PV13, WT14, BAT15) created by the creation unit 24 and the current state of the various load equipment 11 and the distributed power source (PV13, WT14, BAT15) of the power consumer facility 10 It is comprised from the control command part 25 which calculates and outputs.
Each unit of the power management device 20 controls each device and processes data, a central processing unit (ROM) that stores data, a read only memory (ROM) that stores a program, and a program. It is formed by a microcomputer having a RAM (Random Access Memory) used as a work area for temporarily storing data and executing a program.

Next, operation | movement of the energy management system in such a structure is demonstrated.
First, the conversion efficiency acquisition unit 23 acquires the conversion efficiency of each power converter (13a, 14a, 13b, 14b, 15a, 15b) set in the database 21. This conversion efficiency is defined by the following function form (formula 1), and an example of the conversion efficiency function is shown in FIG.

ここで、fは、変換効率の関数、xは、分散型電源から出力される電力値、ａ，ｂ，ｃは、電力変換器の固有の係数をそれぞれ表す。

Here, f is a function of conversion efficiency, x is a power value output from the distributed power source, and a, b, and c are specific coefficients of the power converter, respectively.

Next, the facility information acquisition unit 22 includes facility information and information indicating the current state of each distributed power source (PV13, WT14, BAT15) set in the database 21, and information indicating facility information and the current state of various load facilities 11. The contract information with the electric power company 1 is acquired.
Specifically, predicted power demand values of various load facilities 11, predicted power generation values of PV13, predicted power generation values of WT14, current power storage amount of BAT15, minimum / maximum values of usable power storage amount, charge / discharge power amount The maximum value / minimum value, the charging / discharging efficiency of the BAT 15, the maximum purchaseable power purchase amount, which is contract information with the power company 1, and the power purchase unit price at each time are acquired.
The predicted power demand value is calculated in advance, and may be created according to the season, day of the week, etc., and the amount of power used by various past load facilities 11 For example, a method using an average value of past power consumption for each time zone can be considered.
Further, the predicted power generation values of PV 13 and WT 14 are also calculated in advance, and a method for creating a prediction model from past power generation amount and weather information and calculating from the model and weather forecast information There is.

Next, the control plan creation unit 24 performs each conversion based on the conversion efficiency of the power converters (13a, 14a, 13b, 14b, 15a, 15b) and the facility information and the current information of the distributed power sources (PV13, WT14, BAT15). The control plan value of the distributed power source (PV13, WT14, BAT15) is calculated. At this time, a constraint condition and an objective function are created based on the acquired information, and a control plan value is created by solving an optimization problem.
As an example of the constraint condition and the objective function, in the case of the configuration of the distributed power source (PV13, WT14, BAT15) and the power converter (13a, 14a, 13b, 14b, 15a, 15b) in FIG. The constraint condition can be defined as follows.

  First, the constraint condition of the supply and demand balance constraint is shown in Equation (2).

    Here, ED is a predicted power demand value at time t, E_BUY is a power purchase amount at time t, and E_PVcom is a power generation predicted value generated by the PV 13 at time t, DC of power supplied to the load facility 11 The amount of power after passing through the AC converter 13a, E_WTcom, is the power generation predicted value generated by the WT 14 at time t, and the power supplied to the various load facilities 11 after passing through the DC / AC converter 14a. The amount of power, E_BAT_INPUTcharge, is the amount of power purchased before passing through the AC / DC converter 15a for charging the BAT 15 out of the amount of power purchased at time t, and E_BATdischarge is supplied from the BAT 15 at time t to the various load facilities 11 The amount of electric power discharged after passing through the DC / AC converter 15a. As for the charge / discharge power amount of the BAT 15, a positive value is a discharge power amount and a negative value is a charge power amount.

  Next, the constraint condition of the power purchase amount is shown in Expression (3).

  Here, E_BUY_MIN represents the minimum purchaseable value of the power purchase amount, and E_BUY_MAX represents the maximum purchaseable value of the power purchase amount. The minimum value and the maximum value are predetermined values and are acquired by the facility information acquisition unit 22. The minimum purchaseable value is mainly “0”, and the maximum purchaseable value is contract power determined by a contract with the electric power company 1.

  Next, the constraint condition of BAT15 is shown in Expression (4).

Here, SOC is the amount of power stored in BAT 15 at time t, EFF is the charge / discharge efficiency of BAT 15, SOC_MIN is the minimum value of power stored in BAT 15, and SOC_MAX is the maximum value of power stored in BAT 15 , E_BAT_MIN represents the minimum value of the charge / discharge power amount of BAT 15, and E_BAT_MAT represents the maximum value of the charge / discharge power amount of BAT 15. E_BATcharge is the amount of electric power charged after passing through the AC / DC converter 15a that charges the BAT 15 out of the amount of electric power purchased from the electric power company 1 at time t, and E_BAT_INPUTdischarge is calculated from the BAT 15 at time t to various load facilities 11 E_BATcharge_PV of the power supplied to the battery before passing through the DC / AC converter 15a passes through the DC / DC converter 13b that charges the BAT 15 among the power generation predicted values generated by the PV ₁₃ at time t. charging power amount after, E_BATcharge _{_WT,} of generating predicted values WT14 to generate electricity, indicative of a charged electric energy after passing through the DC / DC converter 14b for charging the BAT15. Note that the charge / discharge efficiency, the minimum / maximum value of the amount of electricity stored, and the minimum / maximum value of the charge / discharge power amount are preset values, and are acquired by the facility information acquisition unit 22. The charge amount is expressed as a negative value, and the discharge amount is expressed as a positive value.

Next, the constraint condition of the power generation amount of PV13 is shown in Expression (5).

  Here, E_PV is a predicted value of the power generation amount generated by the PV 13 at time t, and E_PV_INPUTcom is a DC / AC converter 13a of the power supplied to the various load facilities 11 among the predicted power generation values of the PV 13 at time t. The amount of power before passing, E_PV_INPUTcharge, represents the amount of power before passing through the DC / DC converter 13b that charges the BAT 15 in the predicted power generation value of the PV 13 at time t.

  Next, the constraint condition of the power generation amount of the WT 14 is shown in Expression (6).

  Here, E_WT is a predicted value of the amount of power generated by the WT 14 at time t, and E_WT_INPUTcom is a DC / AC converter 14a of power supplied to the various load facilities 11 among the predicted power generation values of the WT 14 at time t. The electric energy before passing, E_WT_INPUTcharge, represents the electric energy before passing through the DC / DC converter 14b of the electric power charged in the BAT 15 in the power generation predicted value of the WT 14 at time t.

  Next, the constraint condition of the conversion efficiency in the power converters (13a, 14a, 13b, 14b, 15a, 15b) is shown in Expression (7).

  Here, EFF_PVDC / AC is the conversion efficiency of the DC / AC converter 13a through which the power of PV13 passes, EFF_WTDC / AC is the conversion efficiency of the DC / AC converter 14a through which the power of WT14 passes, and EFF_BATAC / DC is the BAT15 The conversion efficiency of the AC / DC converter 15b through which the charging power passes, EFF_BATDC / AC is the conversion efficiency of the DC / AC converter 15a through which the discharge power of the BAT 15 passes, and EFF_PVDC / DC is the DC / DC converter through which the power of the PV 13 passes. The conversion efficiency 13b, EFF_WTDC / DC, represents the conversion efficiency of the DC / DC converter 14b through which the power of the WT 14 passes. Note that these conversion efficiencies are values set in advance, and are acquired by the conversion efficiency acquisition unit 23.

  Furthermore, as the objective function, for example, when creating a control plan value that minimizes the power purchase cost, Equation (8) is used as the objective function.

Here, C_BUY represents the power purchase cost at time t, and E_BUY_COST represents the power purchase unit price at time t.
The power purchase unit price is a preset value, is acquired by the facility information acquisition unit 22, and is determined by a contract with the power company 1. In addition, the calculation period (T) for calculating the total value when minimizing the power purchase cost is determined by the power consumer. For example, the plan for 24 hours a day is made every 30 minutes. A setting value such as

  Next, in the control command unit 25, the control plan value of the distributed power source (PV13, WT14, BAT15) calculated by the control plan creation unit 24 and the current information (output) of each distributed power source (PV13, WT14, BAT15). The control plan value is corrected from the value, the stop state, the amount of power stored in the BAY 15, the purchased power from the power company 1, etc., and the control command value of the distributed power source (PV13, WT14, BAT15) is calculated and output.

  As a method for calculating the control command value, the control command value is calculated by feedback control such as PID control. And the command value of each distributed power source (PV13, WT14, BAT15) is calculated based on the calculated correction value. At this time, each power converter (13a, 13b, 14a, 14b, 15a, 15b) The command value is calculated by apportioning the correction in consideration of the conversion efficiency.

  As described above, according to the power management apparatus 20 according to the first embodiment, the output value considering the conversion efficiency of the power converters (13a, 13b, 14a, 14b, 15a, 15b) is calculated, and each distributed power source is calculated. When calculating the power output from (PV13, WT14, BAT15), high-efficiency power control can be performed by adding correction.

Embodiment 2
In the first embodiment described above, the control of each distributed power source (PV13, WT14, BAT15) is performed based on the preset conversion efficiency of each power converter (13a, 13b, 14a, 14b, 15a, 15b). The plan value is corrected and the distributed power source (PV13, WT14, BAT15) is controlled. The conversion efficiency of the power converters (13a, 13b, 14a, 14b, 15a, 15b) Since it constantly changes depending on deterioration, ambient temperature, and humidity, if the set conversion efficiency is continuously used, an error occurs between the actual conversion efficiency and efficient power supply cannot be performed.
For this reason, the energy management system according to the second embodiment is configured to always calculate and correct the conversion efficiency of the power converters (13a, 13b, 14a, 14b, 15a, 15b). Electric power can be supplied.

FIG. 4 is a schematic diagram showing a configuration of the entire energy management system including the power management apparatus 20 according to Embodiment 2 of the present invention.
4, the same reference numerals are given to the same or corresponding components as in FIG. 1, and the description thereof is omitted.
In the second embodiment, each load facility 11 is provided with a measuring device 16 for measuring the power usage status, and each power between each distributed power source (PV13, WT14, BAT15) and each load facility 11 is provided. Measuring instruments 17 and 18 are provided before and after the converters (13a, 14a, 15a, and 15b), respectively, and measuring instruments 19 are provided before and after the power converters (13b and 14b) between the PV 13 and the WT 14 and the BAT 15, respectively. And the power amount before and after the conversion of the power passing through each power converter (13a, 13b, 14a, 14b, 15a, 15b) is measured and supplied to the power management apparatus 20.

FIG. 5 shows a specific system configuration of the power management apparatus 20 according to the second embodiment.
In the figure, the power management apparatus 20 acquires data from measuring instruments 16, 17, and 18 that measure the operating state of each power converter (13 a, 13 b, 14 a, 14 b, 15 a, 15 b), and records the data in the database 21. The actual value acquisition unit 26 and the conversion efficiency calculation unit that extracts the data acquired by the actual value acquisition unit 26 from the database 21 and calculates the conversion efficiency of each power converter (13a, 13b, 14a, 14b, 15a, 15b) 23. The other configuration is the same as the configuration of FIG.

Next, the operation of the energy management system in such a configuration will be described.
First, in the actual value acquisition unit 26, measuring instruments 17, 18, 19 provided before and after each power converter (13a, 13b, 14a, 14b, 15a, 15b) and measuring instruments provided in various load facilities 11 are used. 16 is acquired as an actual value, and the acquired time is added and stored in the database 21.

  Next, the conversion efficiency calculation unit 23 measures the power before and after the conversion of the power converted by each power converter (13a, 13b, 14a, 14b, 15a, 15b) by the measuring devices 17, 18, and 19. Then, the conversion efficiency is calculated based on the past measurement values. This conversion efficiency is a function represented by the equation (1) as in the first embodiment. The coefficients a, b, and c are calculated based on the measurement values previously measured by the measuring instruments 17, 18, and 19, and can be calculated by the least-squares method or the like.

  At that time, the measurement values to be used may be calculated using all the past measurement values accumulated in the database 21, or may be calculated using only the measurement values of the previous day, It may be calculated using the measurement value of the same time zone, may be calculated using the measurement value of a period narrowed down in the acquisition period such as the past 15 days, or a combination thereof.

Next, the control plan creation unit 24 uses the conversion efficiencies of the power converters (13a, 13b, 14a, 14b, 15a, 15b) calculated by the conversion efficiency calculation unit 23 to use the distributed power sources 13, 14, 15 control plan values are calculated and output from the control command unit 25.
With such an energy management system, each of the distributed power sources 13, 14 reflecting the conversion efficiency of each power converter (13a, 13b, 14a, 14b, 15a, 15b) constantly changing according to aging, ambient temperature and humidity. , 15 control plan values can be created.

Embodiment 3 FIG.
In the first embodiment and the second embodiment described above, it is basically calculated how to control the distributed power source in order to move various load facilities, but the generated power is sold. It is not possible to calculate the control plan value of the distributed power source in consideration of the above. On the other hand, a power supply and demand system has been constructed so that the power generated at the power consumer facility 10 can be sold, such as a recent renewable energy feed-in tariff system, and in Embodiment 3, By calculating a control plan value that also takes into account such power sales, it is possible to more efficiently supply and demand power.

FIG. 6 is a schematic diagram showing the overall configuration of the energy management system including the power management apparatus 20 according to Embodiment 3 of the present invention. Here, the same or corresponding components as those in FIG. 1 or FIG.
In the figure, power is sold to a power company 1 from distributed power sources such as PV13 and WT14 via power converters 13c and 4c.
The configuration of the power management apparatus 20 according to the third embodiment is equivalent to that shown in FIG. 2, but the conversion of the power converters (13a, 13b, 13c, 14a, 14b, 14c, 15a, 15) is performed. Unlike the first and second embodiments, the control plan creation unit 24 that creates control plans for the distributed power sources 13, 14, and 15 based on efficiency differs from the first and second embodiments in that the objective function and constraint conditions of the optimization problem to be solved are expressed by equations. From (9) to Expression (16).

  First, the objective function of the optimization problem in the third embodiment is shown in Expression (9).

Here, C_BUY is the power purchase cost at time t, C_SELL is the power purchase cost at time t, E_BUY is the power purchase amount at time t, E_SELL is the power purchase amount at time t, and E_BUY_COST is the power purchase cost at time t. The power purchase unit price, E_SELL_COST, represents the power sales unit price at time t.
The power purchase unit price and the power sale unit price are preset values determined by a contract with the power company 1 and are acquired by the facility information acquisition unit 22. In addition, the total value calculation period (T) when minimizing the power purchase cost is determined by the power consumer. For example, the plan for 24 hours a day is set in increments of 30 minutes. Is considered.

  Next, the constraint condition of the supply and demand balance constraint in Embodiment 3 is shown in Expression (10).

  Here, ED is the predicted power demand value at time t, E_BUY is the amount of purchased power at time t, and E_PVcom is the power converter 13a of the power consumed by the load facility 11 among the predicted power generation value of PV 13 at time t. E_WTcom is the amount of power after passing through the converter 14a of power consumed by the load facility 11 among the predicted power generation value of the WT 14 at time t, E_WTcom is the storage battery 15 at time t. E_BAT_INPUTcharge is a power converter for charging the storage battery 15 out of the amount of power purchased from the power company 1 at time t. It represents the amount of charge power before passing through 15b.

  Next, the constraint condition of the power sale balance constraint in the third embodiment is shown in Expression (11).

  Here, E_PVcell is the amount of electric power after passing through the converter 13c of the electric power sold to the electric power company 1 among the electric power generation amount of the PV 13 at time t, and E_WTcell is the electric power amount of the electric power generation amount of the WT 14 at time t. It represents the amount of power after passing through the power converter 14c for selling power to the company 1.

  Next, the constraint conditions for buying and selling power in the third embodiment are shown in Expression (12).

Here, E_BUY_MIN is the minimum purchaseable value of the power purchase amount, E_BUY_MAX is the maximum purchaseable value of the power purchase amount, E_SELL_MIN is the minimum sellable value of the power sale amount, and E_SELL_MAX is the saleable amount of the power sale amount Represents the maximum value. The minimum value and the maximum value are predetermined values.
Next, the constraint condition of the storage battery 15 in the third embodiment is shown in Expression (13).

Here, SOC is the storage amount of the storage battery 15 at time t, EFF is the charge / discharge efficiency of the storage battery 15, SOC_MIN is the minimum value of the storage amount that can be used by the storage battery 15, and SOC_MAX is the storage amount that can be used by the storage battery 15. E_BAT_MIN represents the minimum value of the charge / discharge power amount of the storage battery 15, and E_BAT_MAT represents the maximum value of the charge / discharge power amount of the storage battery 15. E_BATcharge is the amount of power purchased after passing through the power converter 15b for charging the storage battery 15 among the amount of power purchased from the power company 1 at time t, and E_BAT_INPUTdischarge is the load from the storage battery 15 at time t. The amount of discharge power E_BATcharge_pv after passing through the power converter 15a supplied to the facility 11 is the power generation predicted value generated by the PV 13 at time t after passing through the power converter 13b charging the storage battery 15. E_BATcharge_WT represents the amount of charging power after passing through the power converter 14b for charging the storage battery 15 among the predicted power generation values generated by the _WT 14. Note that the charging / discharging efficiency, the minimum / maximum value of the charged amount, and the minimum / maximum value of the charging / discharging power amount are preset values, and are acquired by the facility information acquisition unit 22.

  Next, the constraint condition of the PV power generation amount according to the third embodiment is shown in Expression (14).

Here, E_PV is a predicted value of the power generation amount generated by the PV 13 at time t, and E_PV_INPUTcom is a predicted power generation value generated by the PV 13 at time t before passing through the converter 13a of the power supplied to the load facility 11. E_PV_INPUTcharge is the predicted power generation value generated by the PV 13 at time t, the power amount before passing through the converter 13b of the power supplied for charging the storage battery 11, and E_PV_INPUT cell is generated by the PV 13 at time t. Of the predicted power generation value, the amount of power before passing through the converter 13c for power sold to the power company 1 is represented.
Next, the constraint condition of the power generation amount of the WT 14 in the third embodiment is shown in Expression (15).

  Here, E_WT is a predicted value of the amount of power generated by 14 at time t, and E_WT_INPUTcom is a predicted value of power generated by WT 14 at time t before passing through the converter 14a of power supplied to the load facility 11. E_WT_INPUTcharge is the power generation predicted value generated by the WT 14 at time t, and the amount of power before passing through the converter 14b for power supplied to the storage battery 11, and E_WT_INPUT cell is generated by the WT 14 at time t. This represents the amount of power before passing through the converter 14c for the power to be sold, among the predicted power generation values to be sold.

  Next, the constraint condition of the converter in Embodiment 3 is shown in Expression (16).

Here, EFF_PV _{DC / AC_com} is the conversion efficiency of the DC / AC converter 13a through which the power of PV13 passes, EFF_WT _{DC / AC_com} is the conversion efficiency of the DC / AC converter 14a through which the power of WT14 passes, and EFF_BAT _{AC / DC} is The conversion efficiency of the AC / DC converter 15b through which the charging power of the storage battery 15 passes, EFF_BAT _{DC / AC} is the conversion efficiency of the DC / AC converter 15a through which the discharging power of the storage battery 15 passes, and the time t when the storage battery 15 is charged The power amount of PV13, EFF_PV _{DC / DC} is the conversion efficiency of DC / DC converter 13c through which the power of PV13 passes, EFF_WT _{DC / DC} is the conversion efficiency of DC / DC converter 14b through which the power of WT14 passes, EFF_PV _{DC / DC AC_cell} is the conversion efficiency of the DC / AC converter 13c through which the selling power of the PV 13 passes, EFF_WT _{DC / AC_cell} represents the conversion efficiency of the DC / AC converter 14c through which the electric power sold by the WT 14 passes. Note that these conversion efficiencies are values set in advance, and are acquired by the conversion efficiency acquisition unit 23.
As described above, according to the third embodiment, it is possible to calculate a control plan value that also considers the power sale, and to perform the control considering the conversion efficiency of the power converter in the power sale power as well. Can obtain a more effective energy management system.

In the above-described embodiment, a solar power generation device, a wind power generation device, and a system using a storage battery as a distributed power source have been described. However, the system may be configured by a solar power generation device or a wind power generation device and a storage battery. Other power generation devices such as a geothermal power generation device may be used in combination.
Moreover, this invention is not limited to the above-mentioned embodiment, It can change and abbreviate | omit suitably in the range which does not deviate from the summary.

1: Electric power company, 10: Electric power customer facility, 11: Load facility, 13: Solar power generation device,
14: Wind power generator, 15: Storage battery,
13a, 13b, 14a, 14b, 15a, 15b: power converter,
16, 17, 18, 19: measuring instrument, 20: power management device, 21: database,
22: Facility information acquisition unit, 23: Conversion efficiency acquisition unit, 24: Control plan creation unit,
25: Control command part, 26: Actual value acquisition part

Claims (4)

Provided in a power customer facility to which power is supplied from an electric power company, a plurality of load facilities, a distributed power source that supplies power to these load facilities, each of the load facilities, and the distributed power source In an energy management system comprising a plurality of power converters respectively provided between and a power management device that manages the operation of each load facility, the distributed power source and the plurality of power converters,
The power management device includes a facility information acquisition unit that acquires facility information and status information of the distributed power source, a conversion efficiency acquisition unit that acquires information of conversion efficiency of the power converter, and facility information of the distributed power source And a control plan creation unit for creating a control plan for the distributed power source based on the status information and the conversion efficiency of the power converter, and a control command value is calculated based on the control plan value created by the control plan creation unit An energy management system comprising a control command unit.   The energy management system according to claim 1, wherein the distributed power source is a solar power generation facility, a wind power generation facility, and a storage battery.   3. The energy management system according to claim 2, wherein the power generated by the distributed power source is configured to be sold to an electric power company, and at that time, a control plan is created in consideration of conversion efficiency of the power converter. A featured energy management system. Provided in a power customer facility to which power is supplied from an electric power company, a plurality of load facilities, a distributed power source that supplies power to these load facilities, each of the load facilities, and the distributed power source In an energy management system comprising a plurality of power converters provided between and a power management device that manages the operation of each load facility, the distributed power source, and the plurality of power converters,
Furthermore, before the conversion of the power passing through each power converter, comprising a plurality of measuring instruments for measuring the amount of power after the conversion,
The power management apparatus includes an actual value acquisition unit that acquires an actual value of each facility measured by each measuring instrument, an equipment information acquisition unit that acquires facility information and status information of the distributed power source, and the actual value acquisition A conversion efficiency calculation unit that calculates the conversion efficiency of the power converter based on the measured value of each facility acquired by the unit, the facility information and status information of the distributed power source, and the dispersion based on the conversion efficiency of the power converter An energy management system comprising: a control plan creation unit that creates a control plan for a type power supply; and a control command unit that calculates a control command value based on the created control plan value.

Images