JP6374747B2 - Power management system and power management method - Google Patents

Description

  The present invention relates to a residential power management system and a power management method.

In recent years, a power management system that stores a power generation device and a storage battery using renewable energy (natural energy) such as solar power generation is known (see, for example, Patent Document 1).
In addition, the power management system controls the charging and discharging of the storage battery based on the predicted generated power and the predicted power consumption while taking into account the amount of power stored in the storage battery, and the energy is effectively used. (For example, refer to Patent Document 2).

JP 2012-044733 A JP 2013-215092 A

However, in each power management system of patent document 1 and patent document 2, a storage battery deteriorates gradually by repeating charge and discharge. This deterioration is a decrease in the battery capacity or output voltage of the storage battery.
And when the degree of deterioration exceeds a predetermined level, it is necessary to replace the storage battery, and when the storage battery is frequently replaced, the running cost of the power management system that manages the power of the customer facility using the storage battery increases. There's a problem.
Therefore, in order to reduce the running cost of a power management system using a storage battery, it is necessary to reduce the deterioration of the storage battery, extend the life of the storage battery, and reduce the frequency of replacement of the storage battery.

  The present invention has been made in view of such circumstances, and provides a power management system and a power management method for reducing running costs by reducing the degree of deterioration of a storage battery compared to the prior art and extending the life of the storage battery. provide.

Power management system of the present invention is a power management system for extracting operation plan of electrical equipment containing put that solar cells and accumulators facility power from the grid is supplied, meet the demand forecast of the electrical equipment, certain An operation plan creation unit for creating an operation plan indicating an operation plan for each time unit of the storage battery, and a storage battery deterioration model indicating a correspondence between a parameter that causes deterioration of the storage battery and a degree of deterioration of the storage battery are written in advance. An operation for determining the degree of deterioration of the storage battery of the operation pattern in the operation plan in accordance with the stored battery deterioration model and extracting the operation plan having the lowest degree of deterioration of the storage battery from the operation plan. A pattern evaluation unit, wherein the operation pattern evaluation unit evaluates the deterioration of the storage battery in the operation pattern, and a time range. In the time range, and temperature conditions, whether power from the grid is used state, the operating state before Symbol solar cell, the ratio of the maximum capacity of the remaining capacity of the storage battery, the storage battery is charged, discharged, or whether it is a state of waiting, and correspond to and, by the battery deterioration model, and evaluating the degree of deterioration of the battery in the operation pattern.

  In the power management system of the present invention, the operation pattern evaluation unit extracts an operation pattern from the operation plan, determines the degree of deterioration of the storage battery for each time unit based on the storage battery deterioration model, Obtaining a comprehensive evaluation indicating the degree of deterioration of the storage battery in the time unit, and extracting the operation plan corresponding to the operation pattern of the comprehensive evaluation indicating that the comprehensive evaluation indicates the lowest degree of deterioration of the storage battery. It is characterized by.

Power management system of the present invention, that the battery degradation model, to a combination of a plurality of parameters definitive storage degradation model that causes deterioration of the battery, the degree of deterioration of the storage battery is associated Features.
The power management system of the present invention is characterized in that the storage battery deterioration model includes a degree of deterioration due to a parameter in a cycle deterioration model that causes deterioration of the storage battery.

Power management method of the present invention is a power management method for extracting operation plan of electrical equipment containing put that solar cells and accumulators facility power from the grid is supplied, the operation planning unit, of the electrical equipment An operation plan creation process for creating an operation plan showing an operation plan for each predetermined time unit that satisfies the demand prediction, and the operation pattern evaluation unit indicates the degree of deterioration of the storage battery in the operation pattern in the operation plan. Is determined based on a storage battery deterioration model indicating a correspondence between a parameter that causes deterioration of the storage battery and a degree of deterioration of the storage battery, and the degree of deterioration of the storage battery is the lowest from the operation plan. An operation pattern evaluation process for extracting the operation plan, and the operation pattern evaluation unit evaluates deterioration of the storage battery in the operation pattern. And between ranges, in this time range, and the temperature condition, the whether power from the grid is used state, the operating state before Symbol solar cell, the ratio of the maximum capacity of the remaining capacity of the storage battery, storage battery charging, discharging, or whether it is a state of waiting, and correspond to and, by the battery deterioration model, and evaluating the degree of deterioration of the battery in the operation pattern.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the power management system and power management method which reduce a running cost by reducing the grade of deterioration of a storage battery compared with the past, and extending the lifetime of a storage battery.

It is a figure which shows the structural example of the power management system by one Embodiment of this invention. It is a figure which shows the structural example of the power management system 2 in FIG. It is a conceptual diagram which shows the one-dimensional charge / discharge model 500 corresponding to a basic model. It is a figure which shows an example of the storage battery deterioration model written and memorize | stored in the storage battery deterioration model database. It is a figure which shows an example of the driving | running pattern of the storage battery 103 which the driving | running pattern evaluation part 23 extracts from the driving | operation plan written and memorize | stored in the driving | operation pattern memory | storage part. It is a figure which shows the other example of the driving | operation pattern of the storage battery 103 which the driving | running pattern evaluation part 23 extracts from the driving | operation plan written and memorize | stored in the driving | operation pattern memory | storage part. It is a flowchart which shows the flow of the process which extracts the operation plan which reduces the deterioration of the storage battery 103 most from each of the produced | generated operation plans. It is a figure which shows the other structural example of the power management system by one Embodiment of this invention. It is a figure which shows the structural example of the power management system 2 'in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a power management system according to an embodiment of the present invention.
The power management system 1 shown in FIG. 1 manages power used in one facility 100, and corresponds to, for example, what is called a HEMS (Home Energy Management System). The facility 100 is, for example, one of a house, a commercial facility, an industrial facility, a public facility, and the like.

  A facility 100 shown in FIG. 1 includes a solar battery 101, a power conditioner (PCS) 102, a storage battery 103, an inverter 104, a power path switching unit 105, a load 106, and a power management system 2.

The solar cell 101 is a power generation device (solar power generation device) that converts light energy into electric power by the photovoltaic effect. The solar battery 101 converts sunlight into electric power by being installed in a place where sunlight can be efficiently received, such as the roof of the facility 100, for example.
The power conditioner 102 converts the DC power output from the solar battery 101 into AC corresponding to the voltage and frequency used in the facility 100.

  The storage battery 103 is a stationary storage battery provided in the facility 100, stores electric power input during charge control, and discharges and outputs the stored electric power. As the storage battery 103, for example, a lithium ion battery can be employed.

The inverter 104 is provided corresponding to each of the plurality of storage batteries 103, and performs AC / DC conversion of power for charging the storage battery 103 or DC / AC conversion of power output from the storage battery 103 by discharging. That is, bidirectional conversion of power input / output by the storage battery 103 is performed.
Specifically, when charging the storage battery 103, AC power for charging is supplied to the inverter 104 from the commercial power supply AC or the power conditioner 102 via the power path switching unit 105. The inverter 104 converts the alternating-current power supplied in this way into direct current and supplies the storage battery 103 as power for charging.
Further, when the storage battery 103 is discharged, DC power is output from the storage battery 103. The inverter 104 converts the DC power output from the storage battery 103 to AC and supplies the AC power to the power path switching unit 105.

The power path switching unit 105 switches the power path according to the control of the power management system 2.
In accordance with the above control, the power path switching unit 105 can form a power path in the facility 100 so as to supply the commercial power source AC to the load 106.

In addition, the power path switching unit 105 can form a power path in the facility 100 so as to supply the power generated by the solar battery 101 from the power conditioner 102 to the load 106.
Further, the power path switching unit 105 can form a power path in the facility 100 so that the power supplied from one or both of the commercial power supply AC and the solar battery 101 is charged to the storage battery 103 via the inverter 104.
In addition, the power path switching unit 105 can form a power path in the facility 100 so that the power output from the storage battery 103 by discharging is supplied to the load 106 via the inverter 104.

The load 106 collectively indicates devices and facilities that consume power in order to operate themselves in the facility 100.
The power management system 2 manages the power in the facility 100. For this purpose, the power management system 2 controls the electrical equipment in the facility 100 (all or part of the solar cell 101, the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106).

  In addition, the power management system 2 of the present embodiment has a function of EMS (Energy Management System), and particularly as a storage battery control device that controls charging and discharging of the storage battery 103 operated in the facility 100. Includes functionality. In addition, as will be described later, the power management system 2 generates an operation plan indicating input of purchased power from the commercial power supply AC according to the load state of the load 106, control of charging and discharging of the storage battery 103, and the like. An operation pattern indicating an input of commercial power from the power source AC corresponding to the operation plan and a control pattern of the storage battery is generated.

  FIG. 2 is a diagram illustrating a configuration example of the power management system 2 in FIG. The power management system 2 includes a data input / output unit 21, an operation plan creation unit 22, an operation pattern evaluation unit 23, an operation control unit 24, a past data storage unit 25, an operation pattern storage unit 26, and a storage battery deterioration database 27.

  The data input / output unit 21 transmits / receives data indicating each control or state between the solar cell 101, the PCS 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106.

  The operation plan creation unit 22 is a combination of a weather forecast on a target day for creating an operation plan (hereinafter, including the next day of the plan, which is the target day), the season of the target day, the day of the week, the weather of the weather forecast, and the like. Demand for power consumption, purchased power, generated power, discharged power, and charged power for every predetermined time (every time unit) measured in the past in the past corresponding to the power demand indicating the operating state of the load 106 on the target day Based on the prediction, an operation plan that satisfies the power demand prediction of the target day is generated by linear programming or the like. That is, the operation plan creation unit 22 generates an operation plan for controlling each of the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106.

Since the operation plan creation unit 22 creates an operation plan by the linear programming method, since there are a plurality of solutions of the operation plan that satisfy the power consumption demand of the load 106 on the target day, the operation plan creation unit 22 creates a plurality of operation plans. The operation plan identification information for identifying each operation plan is added to the pattern storage unit 26, and the operation plan is written and stored.
Here, the power consumption is the power consumption of the load 106. The purchased power is power purchased from the commercial power supply AC. The generated power is power generated by a power generation device such as the solar battery 101. The discharged power is power that is discharged and supplied from the power stored in the storage battery 103. The charging power is power for charging the storage battery 103 from purchased power or generated power.

The operation pattern evaluation unit 23 sequentially reads out the operation plan from the operation pattern storage unit 26, and from the operation plan that controls each of the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106, only the storage battery 103 is obtained. An operation pattern indicating the control of the system is extracted. In addition, the driving pattern evaluation unit 23 writes and stores the extracted driving pattern in the driving pattern storage unit 26 in correspondence with the driving plan identification information of each driving plan.
The operation pattern evaluation unit 23 reads a storage battery deterioration model (battery deterioration model) from the storage battery deterioration model database 27. And the driving pattern evaluation part 23 evaluates a driving pattern using a storage battery deterioration model, and writes and memorize | stores it in the driving pattern memory | storage part 26 as a driving pattern table.

Here, the storage battery deterioration model used when the operation pattern is evaluated will be described. The storage battery deterioration model includes a storage deterioration model and a cycle deterioration model.
The storage deterioration model is data that gives the basic model a deterioration function as storage deterioration. The storage deterioration is, for example, deterioration that occurs in the storage battery in correspondence with the temperature, and mainly depends on the storage time from the completion of charging of the storage battery 103 to the start of discharge and the ambient temperature. However, since storage deterioration proceeds during charging and discharging, the storage deterioration model data 312 may be constructed in consideration of the time during charging and discharging corresponding to the temperature. Here, the basic model is a model for estimating the internal state of the storage battery 103. In the present embodiment, description will be made by using the degree of deterioration by the storage deterioration model as an example.

FIG. 3 is a conceptual diagram showing a one-dimensional charge / discharge model 500 corresponding to the basic model. FIG. 3A is an image diagram showing a basic configuration example of a storage battery (lithium ion battery), and FIG. 3B is an image diagram modeling it in one dimension.
The one-dimensional charge / discharge model 500 treats the storage battery 103 as a one-dimensional model in which the negative electrode 501, the positive electrode 502, and the separator 503 are homogenized in the plane direction. A negative electrode active material 511 exists in the negative electrode mixture layer as the negative electrode 501, and a positive electrode active material 512 exists in the positive electrode mixture layer as the positive electrode 502.
The one-dimensional charge / discharge model 500 including the negative electrode 501, the positive electrode 502, and the separator 503 is divided into a solid phase and a liquid phase.

The transport process image at the time of discharge of Li (lithium) and Li ions at the time of discharge in each region of the negative electrode 501, the positive electrode 502, and the separator 503 of the one-dimensional charge / discharge model 500 is as follows.
That is, in the solid phase (active material) of the negative electrode 501, Li generates a diffusion flux from the center to the surface. In the solid phase of the positive electrode 502, Li diffuses from the surface to the center.
In the liquid phase (void) of the negative electrode 501, Li ions released from the solid phase by the interface reaction are transported in the direction of the separator 503. Here, since the separator 503 has no reaction, Li ions diffuse while migrating in the direction of the positive electrode 502. In the liquid phase of the positive electrode 502, Li ions are absorbed into the solid phase by the interfacial reaction.

For the negative electrode mixture layer as the negative electrode 501 and the positive electrode mixture layer as the positive electrode 502, the Li concentration and potential in the solid phase and the salt concentration and potential in the liquid phase are calculated, respectively. For the separator, the salt concentration and the potential are calculated.
Such a basic model is described in the following documents, for example.
“Journal of The Electrochemical Society, 141 (1), 1-10 (1994)”

  Further, the cycle deterioration model among the deterioration models is deterioration of the storage battery 103 due to repeated charge / discharge cycles, as described above. In the cycle deterioration model, a passive SEI (Solid Electrolyte Interface) film is formed on the surface of the negative electrode active material 511 in response to charge / discharge, and the battery capacity decreases as the passive SEI film grows. And deterioration such as increase in impedance (internal resistance). The cycle deterioration model models a state change due to the growth of a passive SEI film.

Further, among the deterioration models, the storage deterioration model is deterioration that occurs in the storage battery in the storage state as described above. The storage deterioration model also models changes in the state of the storage battery due to such changes in deterioration factors, for example, as changes in the characteristics of specific active materials and changes in specific structures with the passage of storage time cause deterioration. It is a thing.
Note that the cycle deterioration model described in the present embodiment is described in, for example, the following documents.
“Journal of The Electrochemical Society, 151 (2), A196-A203 (2004)”

Returning to FIG. 2, in the storage battery deterioration model database 27, for example, a storage deterioration model is written and stored in advance as a storage battery deterioration model. The storage battery deterioration model of the present embodiment is an example, and a combination of a plurality of parameters in the storage deterioration model or the cycle deterioration model may be associated with the degree of deterioration of the storage battery.
The past data storage unit 25 stores power consumption, purchased power, generated power, and discharged power for each predetermined time in the past obtained by actual measurement corresponding to combinations of seasons, days of the week, weather, and the like. In addition, data such as charging power is written and stored.
In the operation pattern storage unit 26, an operation plan and an operation pattern table (described later) are written and stored.

FIG. 4 is a diagram illustrating an example of a storage battery deterioration model written and stored in the storage battery deterioration model database 27.
The storage battery deterioration model shown in FIG. 4 is a storage deterioration model with respect to the ambient environmental temperature as an example. The storage battery deterioration model table showing the storage deterioration model is for storage batteries having “SOC: 0%”, “SOC: 50%”, and “SOC: 100%” corresponding to “temperature state” and “temperature value”. SOC (State Of Charge) which is the ratio of the remaining capacity to the maximum capacity is shown. In the columns under “SOC: 0%”, “SOC: 50%”, and “SOC: 100%”, the degree of deterioration of the storage battery 103 is “low deterioration”, “under deterioration”, and “high deterioration”. It is shown. “Temperature state” indicates that the temperature state is one of low temperature, medium temperature and high temperature. In this storage battery deterioration model table, for example, in the temperature state, the low temperature is around 15 ° C, the medium temperature is around 25 ° C, and the high temperature is around 35 ° C.

In this storage battery deterioration model table, when the temperature state is low, when the SOC is “0%”, the deterioration degree of the storage battery is “low deterioration”, and when the SOC is “100%”, the storage battery When the degree of deterioration is “deteriorating” and the SOC is “50%”, the degree of deterioration of the storage battery is “highly deteriorated”.
Further, when the temperature state is medium temperature, when the SOC is “0%”, the degree of deterioration of the storage battery is “low deterioration”, and when the SOC is “100%”, the degree of deterioration of the storage battery is “deteriorating”. When the SOC is “50%”, the degree of deterioration of the storage battery is “highly deteriorated”.
When the temperature state is high, when the SOC is “0%”, the deterioration degree of the storage battery is “low deterioration”, and when the SOC is “50%”, the deterioration degree of the storage battery is “deteriorating”. Yes, when the SOC is “100%”, the degree of deterioration of the storage battery is “highly deteriorated”.

The storage battery deterioration model may be anything as long as the parameter affecting the deterioration and the degree of deterioration are related. For example, the physical model considering the electrochemical reaction phenomenon of the storage battery, the behavior of the storage battery as resistance or capacitance An equivalent circuit model that is replaced with a circuit made up of and the like is well known.
Of course, as the storage battery deterioration model of the storage battery 103, the same model number (product) as that of the storage battery 103 may be actually created by reproducing the state of each temperature and each SOC and measuring the degree of “deterioration”. The following description is performed using a storage battery deterioration model created by measuring the degree of “deterioration” of the storage battery 103 as an example.
The accuracy of the degree of “deterioration” of the storage battery 103 can be improved by making each of the temperature range in the “temperature state” and the range of% of SOC finer.
In addition, the storage battery deterioration model in the present embodiment is an example, and in creating the storage battery deterioration model, not only the “temperature state” and the SOC in the storage deterioration model but also parameters that cause other deterioration including cycle deterioration are used. Thus, the degree of “deterioration” can be evaluated with high accuracy.

FIG. 5 is a diagram illustrating an example of an operation pattern of the storage battery 103 that is written and stored in the operation pattern storage unit 26 and extracted from the operation plan by the operation pattern evaluation unit 23. In FIG. 5, the operation pattern evaluation unit 23 evaluates the item of “deterioration” based on the storage battery deterioration model, and writes and stores it in the operation pattern table. The operation pattern of FIG. 5 shows the operation state of the storage battery 103 from 7:00 on the current day to be controlled to 7:00 on the next day.
As for the operation pattern, “temperature state”, “from system”, “from PV”, “from battery”, “SOC”, “state”, and “deterioration” are written and stored corresponding to “time”. Has been.
“Time” indicates a time range in which the deterioration of the storage battery 103 in the operating state is evaluated. As the time range is reduced, the accuracy of degradation evaluation can be improved. “Temperature state” indicates that the temperature of the target day in the area where the facility 100 is built (precisely, the temperature in the vicinity of the storage battery 103) is in a state of one of low temperature, medium temperature, and high temperature. Yes.

  “From system” in the time in the above time range indicates a state in which electric power is supplied from the commercial power source AC (system power source) to the load 106. There are three types of “from system”: non-use, standby, and use. When “from system” is used, the commercial power source AC is connected to one terminal of its own internal switch (not shown) as the power path of the power path switching unit 105 in FIG. 1, and this internal switch is turned on. It shows the state. The other terminal of the internal switch is connected to the load 106. When “from the system” is in a standby state, the commercial power supply AC is connected to one terminal of its own internal switch as the power path of the power path switching unit 105 in FIG. 1, and the internal switch is in an off state. . When “from system” is not used, the commercial power source AC is not connected to one terminal of its own internal switch as the power path of the power path switching unit 105 in FIG. 1, and the internal switch is in the off state. Indicates the state. In standby and non-use, power is not supplied from the commercial power supply AC to the load 106. Only in use, power is supplied from the commercial power supply AC to the load 106.

  “From the battery” in the time that is the time range indicates a state in which power is supplied from the storage battery 103 to the load 106. There are three types of “from battery”: non-use, standby, and use. When “from battery” is used, the power path of the power path switching unit 105 in FIG. 1 connects the inverter 104 and the load 106 and the inverter 104 is operating. When “from battery” is in a standby state, the power path of the power path switching unit 105 in FIG. 1 does not connect the inverter 104 and the load 106 and the inverter 104 is operating. When “from battery” is not used, the power path of the power path switching unit 105 in FIG. 1 does not connect the inverter 104 and the load 106 and the inverter 104 is not operating. Similarly to “from the system”, in the case of standby and non-use, power is not supplied from the storage battery 103 to the load 106. Only in use, power is supplied from the storage battery 103 to the load 106.

“From PV” in the time that is the time range indicates a state in which power is supplied from the solar cell 101 to the load 106. There are two types of “from PV”: unsupplied (non-power generation) and supplied (power generation). When “from PV” is supply (power generation), the power path of the power path switching unit 105 in FIG. 1 connects the PCS 102 and the load 106 and the solar cell 101 is generating power. When “from battery” is not supplied (not generated), the power path of the power path switching unit 105 in FIG. 1 does not connect the PCS 102 and the load 106 and the solar cell 101 does not generate power. ing.
Similarly to “from system”, in the case of non-supply (non-power generation), power is not supplied from the solar cell 101 to the load 106 via the PCS 102. Only in the case of supply (power generation), power is supplied from the solar cell 101 to the load 106.
In the operation mode of the power management system 1 shown here, when the amount of power generated by the solar cell 101 exceeds the amount of power used by the load 106, that is, when surplus power is generated, a reverse power flow is performed with respect to the commercial power supply AC. Ask the power company to buy it through the grid.

“SOC” indicates SOC which is a ratio of the remaining capacity of the storage battery 103 to the maximum capacity.
“State” indicates whether the storage battery 103 is in a charge, charge (late-night power), discharge, or standby state. Charging (midnight power) indicates a state in which charging is performed by cheap night power purchased from commercial power AC, not generated power of the solar battery 101.
“Deterioration” indicates the degree of deterioration state of the storage battery 103 corresponding to the combination of the temperature state and the parameter causing the deterioration of the SOC in the storage battery deterioration model table shown in FIG.

As will be described later, in the present embodiment, at the time of 23:00 at the end of the day, the storage battery 103 is fully discharged and the SOC is 0%. Thereafter, the storage battery 103 is fully charged by the late-night power from the commercial power AC, and the SOC becomes 100%. Thereafter, the storage battery 103 is in a standby state until 7:00 the next morning.
Therefore, in FIG. 5, the storage battery 103 is fully charged at the time “7:00” in the time range “7: 00-9: 00”.
In the time range of “7:00 to 9:00”, the “temperature state” is a state in which the medium temperature changes to the high temperature, “from the system” is not used, and “from PV” is not supplied. "No power generation", "From battery" is in use, and "SOC" is described as "↓" indicating that it falls from the SOC (100%) in the time zone of "1: 00-7: 00" Has been. Further, since the “state” of the control of the storage battery 103 is discharge, the “temperature state” changes from medium temperature to high temperature, and the degree of “deterioration” changes from medium to medium, the degree of “deterioration” in FIG. Is shown as medium → medium.
That is, since the grid power from the commercial power AC is not purchased at the time “7:00 to 9:00” and the power is supplied by discharging from the storage battery 103, the SOC of the storage battery 103 is 100% to 50%. It is a state that has changed to. Since the temperature state at this time “7:00 to 9:00” changes from medium temperature to high temperature and the SOC changes from 100% to 50%, “deterioration” is based on the storage battery deterioration model table shown in FIG. Is determined to change from medium to medium (no change in the medium).

In the time range of time “9: 00-12: 00”, “temperature state” is a high temperature state, “from system” is standby, “from battery” is standby, and “SOC” is 50 %. Further, since “from PV” is supply (power generation), the “state” of the control of the storage battery 103 is standby, the “temperature state” is high temperature, and the degree of “deterioration” is in the middle state. 5, the degree of “deterioration” is indicated as medium.
That is, at time “9: 00-12: 00”, the grid battery from the commercial power AC is not purchased, and the battery 103 is not discharged, and only the power generated by the solar battery 101 is supplied. The SOC of 103 remains unchanged from 50%. Since the temperature state at this time “9: 00-12: 00” is high temperature and the SOC is maintained at 50%, the degree of “deterioration” is moderate based on the storage battery deterioration model table shown in FIG. It has been judged.

In the time range of “12: 00-14: 00”, “temperature state” is a high temperature state, “from system” is not used, “from battery” is used, and “SOC” is It changes from 50% to 0%. “From PV” is supply (power generation), “state” of control of the storage battery 103 is discharge, “temperature state” is high temperature, and the degree of “deterioration” changes from medium to small. Therefore, in FIG. 5, the degree of “deterioration” is shown as medium → small.
That is, at time “12: 00-14: 00”, the grid power from the commercial power AC is not purchased, the power generated by the solar battery 101 is supplied, and the storage battery 103 is discharged. ing. For this reason, the SOC of the storage battery 103 is changing from 50% to 0%. Since the temperature state at this time “12: 00-14: 00” is high and the SOC changes from 50% to 0%, the degree of “deterioration” is medium based on the storage battery deterioration model table shown in FIG. Determined to be small.

In the time range of “14: 00-18: 00”, “temperature state” is a high temperature state, “from system” is standby, “from PV” is supply (power generation), “battery” “From” is standby, and “SOC” is 0%. Further, since the “state” of the control of the storage battery 103 is standby, the “temperature state” is high temperature, and the degree of “deterioration” is small, FIG. 5 shows that the degree of “deterioration” is small. Has been.
That is, at time “14: 00-18: 00”, the grid power from the commercial power AC is not purchased and the storage battery 103 is not discharged, while the power generated by the solar battery 101 is supplied. Since the temperature state at this time “14: 00-18: 00” is high temperature and the SOC is 0%, the degree of “deterioration” is small based on the storage battery deterioration model table shown in FIG. It has been determined.

In the time range of “18: 00-20: 00”, the “temperature state” is a state where the temperature changes from high temperature to medium temperature, “from system” is used, and “from PV” is not supplied (unpowered) “From battery” is not used, and “SOC” is 0%. Further, since the “state” of the control of the storage battery 103 is standby, the “temperature state” changes from a high temperature to a medium temperature, and the degree of “deterioration” is small, the degree of “deterioration” is small in FIG. It is shown.
That is, at time “18: 00-20: 00”, the grid power from the commercial power AC is purchased and supplied, while the solar battery 101 is not generating power and the storage battery 103 is discharged. not going. Since the temperature state at this time “18: 00-20: 00” changes from a high temperature to a medium temperature and the SOC is 0%, the degree of “deterioration” is small based on the storage battery deterioration model table shown in FIG. It has been determined.

In the time range of “20: 00-23: 00”, the “temperature state” is an intermediate temperature state, “from the system” is used, “from PV” is not supplied (unpowered), “From battery” is not used, and “SOC” is 0%. Further, since the “state” of the control of the storage battery 103 is standby and the “temperature state” is medium temperature, the degree of “deterioration” is small, and therefore, the degree of “deterioration” is shown as small in FIG. ing.
That is, at time “20: 00-23: 00”, the grid power from the commercial power AC is purchased, while the solar battery 101 is not generating power, and the storage battery 103 is discharged and charged. Therefore, the SOC of the storage battery 103 is 0%. Since the temperature state at this time “20: 00-23: 00” is medium temperature and the SOC is 0%, it is determined that the degree of “deterioration” is small based on the storage battery deterioration model table shown in FIG. ing.

In the time range of time “23:00 to 10:00 on the next day”, “temperature state” is medium temperature, “from system” is used, “from PV” is not supplied (unpowered), “ “From battery” is not used (charging), “SOC” is changed from 0% to 100%, “State” is charging (midnight power), and the degree of “deterioration” is small to large It has changed and has changed from large to medium.
That is, at time “23: 00-10: 00”, the storage battery 103 is supplied with power from the commercial power supply AC by nighttime power, and has not lost power due to the discharge from the storage battery 103, and the storage battery 103 is charged. Is fully charged, and the SOC is 100% at 1:00. Since the temperature state at this time “23: 00-1: 00” is medium temperature and the SOC has changed from 0% to 50% and from 50% to 100%, based on the storage battery deterioration model table shown in FIG. Since the degree of “deterioration” changes from small to large and further changes from large to medium, it is determined as small → large → medium.

In the time range of “next day 1:00 to next day 7:00”, “temperature state” is medium temperature, “from system” is standby or used, and “from PV” is not supplied (not generated) Yes, “From battery” is not used, “SOC” is 100%, “State” is fully charged and standby, and “Deterioration” is moderate.
That is, at the time “next day 1: 00-next day 7:00”, the storage battery 103 has an SOC of 100% due to charging by night power, and is in a standby state at full charge. Not receive the supply. In addition, when the load 106 is not operating, the storage battery 103 is not discharged, so the storage battery 103 does not lose power and the storage battery 103 is fully charged. At this time, when the load 106 is operated, power is not supplied to the load 106 due to discharge from the storage battery 103, but the load 106 is supplied with power from the commercial power source AC. Since the temperature state at this time “next day 1:00 to next day 7:00” is medium temperature and the SOC is 100%, the degree of “deterioration” is determined to be medium based on the storage battery deterioration model table shown in FIG. ing.

FIG. 6 is a diagram illustrating another example of the operation pattern of the storage battery 103 that is written and stored in the operation pattern storage unit 26 and extracted from the operation plan by the operation pattern evaluation unit 23. The operation pattern in FIG. 6 shows the operation state of the storage battery 103 from 23:00 on the previous day to 23:00 on the current day to be controlled, as in FIG.
As for the operation pattern, “temperature”, “from system”, “from PV”, “from battery”, “SOC”, “state”, and “deterioration” are written and stored in correspondence with “time”. ing. Each item in this operation pattern is the same as in FIG.

In FIG. 6, the storage battery 103 is fully charged at the time “7:00” in the time range “7:00 to 9:00”.
Further, in the time range of “7:00 to 9:00”, “temperature state” is a state in which the temperature changes from medium temperature to high temperature, “from system” is used, and “from PV” is not supplied ( "No power generation" and "from battery" is not used, and "SOC" is maintained at 100% without decreasing from the SOC (100%) in the time zone of "1: 00-7: 00" It is described that. Further, since the “state” of the control of the storage battery 103 is standby, the “temperature state” changes from medium temperature to high temperature, and the degree of “deterioration” changes from medium to large, the “degree” of deterioration in FIG. Is shown as medium to large.
That is, at time “7:00 to 9:00”, the power generated from the commercial power AC is purchased and supplied without using the generated power from the solar battery 101 and discharging from the storage battery 103. Therefore, the SOC of the storage battery 103 is held at 100%. Since the temperature state at this time “7: 00-9: 00” changes from medium temperature to high temperature and the SOC is maintained at 100%, the degree of “deterioration” is based on the storage battery deterioration model table shown in FIG. It is determined to change from medium to large.

In the time range of “9: 00-12: 00”, “temperature state” is a high temperature state, “from system” is standby, “from PV” is supply (power generation), “battery” "From" is standby, and "SOC" is 100%. Further, since the “state” of the control of the storage battery 103 is standby, the “temperature state” is high temperature, and the degree of “deterioration” is large, FIG. 6 shows that the degree of deterioration is large. Yes.
That is, at time “9: 00-12: 00”, the grid battery from the commercial power AC is not purchased, and the battery 103 is not discharged, and only the power generated by the solar battery 101 is supplied. The SOC of 103 remains unchanged from 100%. Since the temperature state at this time “9: 00-12: 00” is high temperature and the SOC is held at 100%, the degree of “deterioration” is large based on the storage battery deterioration model table shown in FIG. It has been judged.

In the time range of “12: 00-14: 00”, “temperature state” is a high temperature state, “from system” is not used, “from PV” is supply (power generation), “ “From battery” is used, and “SOC” decreases from 100% to 50%, so “↓” is described. Further, since the “state” of the control of the storage battery 103 is discharge, the “temperature state” is high temperature, and the degree of “deterioration” changes from large to medium, the degree of “deterioration” in FIG. Is shown as large → medium.
That is, at time “12: 00-14: 00”, the grid power from the commercial power AC is not purchased, while the power generated by the solar battery 101 is supplied and the storage battery 103 is discharged. Therefore, the SOC of the storage battery 103 is changed from 100% to 50%. Since the temperature state at this time “12: 00-14: 00” is high and the SOC changes from 100% to 50%, the degree of “deterioration” is large based on the storage battery deterioration model table shown in FIG. It is determined to change in.

In the time range of “14: 00-18: 00”, “temperature state” is a high temperature state, “from system” is standby, “from PV” is supply (power generation), “battery” "From" is standby, and "SOC" is 50%. Further, since the “state” of the control of the storage battery 103 is standby, the “temperature state” is high temperature, and the degree of “deterioration” is in the middle state, FIG. 6 shows that the degree of “deterioration” is medium. Has been.
That is, at time “14: 00-18: 00”, the grid power from the commercial power AC is not purchased and the storage battery 103 is not discharged, so only the power generated by the solar battery 101 is supplied. Therefore, the SOC of the storage battery 103 is not changed from 50%. Since the temperature state at this time “14: 00-18: 00” is high and the SOC is held at 50%, the degree of “deterioration” is moderate based on the storage battery deterioration model table shown in FIG. It has been judged.

In the time range of “18: 00-20: 00”, the “temperature state” changes from a high temperature to an intermediate temperature, “from the system” is not used, and “from PV” is not supplied (not supplied) Power generation), “from battery” is in use, and “SOC” is changing from 50% to 0%. Further, since the “state” of the control of the storage battery 103 is discharge, the “temperature state” changes from high temperature to medium temperature, and the degree of “deterioration” changes from medium to small, the degree of “deterioration” in FIG. Is shown as medium to small.
That is, at time “18: 00-20: 00”, the grid power from the commercial power AC is not purchased, and the solar battery 101 is not generating power, while the power is supplied by the discharge from the storage battery 103. Therefore, the SOC of the storage battery 103 is changing from 50% to 0%. Since the temperature state at this time “18: 00-20: 00” changes from high temperature to medium temperature and the SOC changes from 50% to 0%, the degree of “deterioration” based on the storage battery deterioration model table shown in FIG. Is determined to change from medium to small.

In the time range of “20: 00-23: 00”, the “temperature state” is an intermediate temperature state, “from the system” is used, “from PV” is not supplied (unpowered), “From battery” is not used, and “SOC” is 0%. Further, since the “state” of the control of the storage battery 103 is standby and the “temperature state” is medium temperature, the degree of “deterioration” is small, and therefore, the degree of “deterioration” is shown as small in FIG. ing.
That is, at time “20: 00-23: 00”, the grid power from the commercial power AC is purchased, while the solar cell 101 is not generating power, and the storage battery 103 is discharged and charged. Therefore, the SOC of the storage battery 103 is 0%. Since the temperature state at this time “20: 00-23: 00” is medium temperature and the SOC is 0%, it is determined that the degree of “deterioration” is small based on the storage battery deterioration model table shown in FIG. ing.

In the time range of time “23:00 to 10:00 on the next day”, “temperature state” is medium temperature, “from system” is used, “from PV” is not supplied (unpowered), “ “From battery” is not used (charging), “SOC” is changed from 0% to 100%, “State” is charging (midnight power), and the degree of “deterioration” is small to large It has changed and has changed from large to medium.
That is, at time “23: 00-10: 00”, the storage battery 103 is supplied with power from the commercial power supply AC by nighttime power, and has not lost power due to the discharge from the storage battery 103, and the storage battery 103 is charged. Is fully charged, and the SOC is 100% at 1:00. Since the temperature state at this time “23: 00-1: 00” is medium temperature and the SOC has changed from 0% to 50% and from 50% to 100%, based on the storage battery deterioration model table shown in FIG. Since the degree of “deterioration” changes from small to large and further changes from large to medium, it is determined as small → large → medium.

In the time range of “next day 1:00 to next day 7:00”, “temperature state” is medium temperature, “from system” is standby or used, and “from PV” is not supplied (not generated) Yes, “From battery” is not used, “SOC” is 100%, “State” is fully charged and standby, and “Deterioration” is moderate.
That is, at the time “next day 1: 00-next day 7:00”, the storage battery 103 has an SOC of 100% due to charging by night power, and is in a standby state at full charge. Not receive the supply. In addition, when the load 106 is not operating, the storage battery 103 is not discharged, so the storage battery 103 does not lose power and the storage battery 103 is fully charged. At this time, when the load 106 is operated, power is not supplied to the load 106 due to discharge from the storage battery 103, but the load 106 is supplied with power from the commercial power source AC. Since the temperature state at this time “next day 1:00 to next day 7:00” is medium temperature and the SOC is 100%, the degree of “deterioration” is determined to be medium based on the storage battery deterioration model table shown in FIG. ing.
Since the operation pattern shown in FIG. 6 has a higher degree of deterioration than the operation pattern shown in FIG. 5, in the present embodiment, the pattern shown in FIG. 5 is selected as the operation plan.

Returning to FIG. 2, the driving pattern evaluation unit 23 writes and stores each driving pattern extracted from the driving plan in the driving pattern storage unit 26.
The operation pattern evaluation unit 23 sequentially reads out the operation pattern tables and evaluates the degree of “deterioration” of the storage battery 103 for each “time” in each operation pattern table based on the storage battery deterioration model. In addition, the operation pattern evaluation unit 23 writes the evaluated degree of “deterioration” in the “deterioration” item of the storage battery 103 corresponding to each “time” in the operation pattern table in the operation pattern storage unit 26.

  The operation pattern evaluation unit 23 refers to the operation pattern table corresponding to each operation plan in the operation pattern storage unit 26 and extracts the operation pattern table having the smallest comprehensive evaluation indicating the degree of “deterioration” in the entire day. That is, the operation pattern evaluation unit 23 extracts an operation pattern table having a comprehensive evaluation indicating that the deterioration of the storage battery 103 is the smallest from a plurality of operation patterns. Then, the operation pattern evaluation unit 23 outputs an operation plan corresponding to the extracted operation pattern to the operation control unit 24. Here, in the degree of “deterioration”, large is “1”, medium is “0.5”, small is 0, “large → middle” or “middle → large” is 0.75, “middle → When “small” or “small → medium” is set to 0.25, the driving pattern evaluation unit 23 integrates the degree of numerical “deterioration” corresponding to each “time” of the day, and the smallest integrated result is obtained. You may comprise so that the operation pattern of a value (total evaluation) may be extracted as an operation pattern with the least deterioration of the storage battery 103 in an operation. By setting the temperature, SOC, and degree of deterioration in more detail, the operation plan can be evaluated in more detail.

  Based on the operation plan input from the operation pattern evaluation unit 23, the operation control unit 24 controls the operation of the load 106, such as purchasing power from the commercial power source AC, discharging the storage battery 103, and the like.

FIG. 7 is a flowchart showing a flow of processing for extracting an operation plan that most reduces the deterioration of the storage battery 103 from each of the generated operation plans.
Step S1:
In order to create an operation plan for a target day (for example, tomorrow) for which an operation plan is to be created, the operation plan creation unit 22 notifies the weather forecast data of the target day via a network such as the Internet, for example. Read from the weather site.

Step S2:
Next, the operation plan creation unit 22 reads from the past data storage unit 25 data such as power consumption, purchased power, generated power, discharged power, and charged power in the past weather similar to the weather on the target day.

Step S3:
And the operation plan preparation part 22 is based on the demand prediction of the power consumption of the load 106 on a target day, and data, such as power consumption in the past weather similar to a target day, purchased power, generated power, discharge power, and charging power. Then, an operation plan for the target day of each facility in the facility 100 is created.
The operation plan creation unit 22 writes and stores each of the created operation plans for the target date in the operation pattern storage unit 26.

Step S4:
The operation pattern evaluation unit 23 reads the storage battery deterioration model table of the storage battery 103 from the storage battery deterioration model database 27.

Step S5:
The operation pattern evaluation unit 23 sequentially reads out the operation plan from the operation pattern storage unit 25, extracts the operation pattern from the operation plan, and creates an operation pattern table.
And the driving pattern evaluation part 23 writes and memorize | stores the created driving pattern table in the driving pattern memory | storage part 26 corresponding to the driving plan which is an extraction origin.

Step S6:
The operation pattern evaluation unit 23 refers to the storage battery deterioration model table and determines the degree of “deterioration” of the storage battery 103 at each “time” in the operation pattern table. Here, in the determination of the degree of “deterioration” of each “time”, the operation pattern evaluation unit 23 detects the combination of the temperature state and the SOC at this “time” from the storage battery deterioration model table, and “deterioration” in this combination. Is performed by extracting the degree of “deterioration” at each time of the operation pattern table as a determination result.

For example, when “time” in FIG. 5 is “9: 00-12: 00”, the operation pattern evaluation unit 23 indicates that the “temperature state” is high temperature, the battery 103 is not discharged, and the SOC Is 50%, medium is extracted as the degree of “deterioration” in the electricity storage degradation model table of FIG.
Then, the operation pattern evaluation unit 23 writes and stores the determination result of the degree of “deterioration” of the storage battery 103 for each “time” in the operation pattern table to be processed in the operation pattern storage unit 26.

Step S7:
Next, the operation pattern evaluation unit 23 detects the presence or absence of an operation plan from which no operation pattern has been extracted in the operation plan stored in the operation pattern storage unit 25. That is, the operation pattern evaluation unit 23 detects the presence or absence of an operation plan that does not determine the degree of “deterioration” of the storage battery 103.
At this time, if there is no operation plan in which the degree of “deterioration” of the storage battery 103 has not been determined, the operation pattern evaluation unit 23 advances the process to step S8. On the other hand, if there is an operation plan that does not determine the degree of “deterioration” of the storage battery 103, that is, if there is an operation plan that determines the degree of “deterioration” of the storage battery 103, the operation pattern evaluation unit 23 performs the process in step S5. Proceed to the process.

Step S8:
The operation pattern evaluation unit 23 sequentially refers to the operation pattern table corresponding to each operation plan in the operation pattern storage unit 25, reads the degree of “deterioration” of each time in each operation pattern table, and “deteriorates” the storage battery 103. The overall evaluation of the degree of "
Then, the operation pattern evaluation unit 23 extracts the operation pattern table having the best overall evaluation among the operation pattern tables in the operation pattern storage unit 25, that is, the operation pattern table having the smallest degree of “deterioration” of the storage battery 103. As described above, the operation pattern evaluation unit 23 extracts an operation pattern table having a comprehensive evaluation indicating that the deterioration of the storage battery 103 is the smallest from a plurality of operation patterns.

  Here, when extracting the operation pattern table in which the degree of “deterioration” of the storage battery 103 is the smallest, the operation pattern evaluation unit 23 quantifies the degree of “deterioration” as described above as a comprehensive evaluation. An integration result obtained by integrating the degree of deterioration of "" may be used as a comprehensive evaluation. At this time, when the operation pattern evaluation unit 23 increases the numerical value of the degree of “deterioration” as the deterioration of the storage battery 103 is smaller, the operation pattern evaluation unit 23 selects the operation pattern table having the largest comprehensive evaluation value, while the degree of “deterioration”. Is made smaller as the deterioration of the storage battery 103 is smaller, the operation pattern table having the smallest comprehensive evaluation value is selected.

  As described above, according to the present embodiment, it is possible to easily extract the operation plan with the least deterioration of the storage battery 103 from the plurality of operation plans for the future evaluation target date created by the operation plan creation unit 22. Therefore, the electrical equipment of the facility 100 can be controlled by an operation plan in which the deterioration of the storage battery 103 is small, and the degree of “deterioration” of the storage battery 103 can be suppressed. Thereby, according to this embodiment, deterioration of the storage battery 103 can be suppressed, the lifetime of the storage battery 103 can be extended compared with the past, and the frequency of replacement | exchange of the storage battery 103 can be lowered | hung compared with the past, and a power management system The running cost can be reduced as compared with the conventional one.

  FIG. 8 is a diagram illustrating another configuration example of the power management system according to the embodiment of the present invention. In FIG. 8, a plurality of facilities 200 having the same configuration as the facility 100 shown in FIG. 1 are provided. The configuration in which the facility 200 is different from the facility 100 is that a power management device 3 is provided instead of the power management system 2. In FIG. 8, the same components as those in FIG. The power management apparatus 3 controls the electrical facilities in the facility 200 (solar cell 101, power conditioner 102, storage battery 103, inverter 104, power path switching unit 105, and load 106 all or a part) supplied operation. Only the function of the operation control unit 24 in the power management system 2 is performed according to the plan. The power management system 2 ′ has the same configuration as that of the power management system 2 of FIG. 1, but does not have the function of the operation control unit 24 in the power management system 2. The power management system 2 'and each facility 200 transmit and receive data via the network 300 including the Internet.

FIG. 9 is a diagram illustrating a configuration example of the power management system 2 ′ in FIG. The power management system 2 includes a data input / output unit 21 ′, an operation plan creation unit 22 ′, an operation pattern evaluation unit 23 ′, a past data storage unit 25 ′, an operation pattern storage unit 26 ′, and a storage battery deterioration database 27 ′. .
The data input / output unit 21 ′ transmits / receives data indicating the control or state of each facility 200 between the facilities 200 via the network 300.

  The operation plan creation unit 22 'corresponds to combinations of seasons, days of the week, weather, and the like, and includes power consumption, purchased power, generated power, and discharged power for each predetermined time in the past obtained by actual measurement. The operation plan for the target day is based on the charge forecast, the weather forecast for the target day (the target day including tomorrow) for which the operation plan is to be created, and the demand forecast indicating the operating state of tomorrow's load 106. Generate every 200. That is, the operation plan creation unit 22 generates an operation plan for controlling each of the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106 that are electrical facilities for each facility 200.

  Here, the operation plan creation unit 22 ′ performs power demand prediction on the evaluation target date in each facility 200, and creates an operation plan for each facility 200 based on the demand prediction. At this time, the operation plan creation unit 22 ′ uses surplus power or insufficient power corresponding to the power consumption in each facility 200 by power generation prediction or power consumption prediction of the solar cell 101 in all the facilities 200 that manage power. Ask for. And operation plan preparation part 22 'is the operation | movement including charging / discharging of the storage battery 103 of each facility 200 including the interchange of the electric power between each facility 200 based on the surplus electric power or shortage electric power in each facility 200, etc. Create a plan.

Since the operation plan creation unit 22 ′ creates an operation plan for each facility 200 by the linear programming method, a plurality of operation plan solutions that satisfy the power consumption demand of the load 106 on the evaluation target day exist for each facility 200. Create an operation plan for Then, the operation plan creation unit 22 ′ adds facility operation plan identification information for identifying each of the facility 200 and the operation plan to the operation pattern storage unit 26 ′ for each of the created operation plans. Write and memorize the operation plan.
Here, the power consumption is the power consumption of the load 106. The purchased power is power purchased from the commercial power supply AC. The generated power is power generated by a power generation device such as the solar battery 101. The discharged power is power that is discharged and supplied from the power stored in the storage battery 103. The charging power is power for charging the storage battery 103 from purchased power or generated power.

  The operation pattern evaluation unit 23 ′ sequentially reads out the operation plan of each facility from the operation pattern storage unit 26 ′, and controls each of the power conditioner 102, the storage battery 103, the inverter 104, the power path switching unit 105, and the load 106. An operation pattern indicating control of only the storage battery 103 is extracted from the plan. In addition, the operation pattern evaluation unit 23 ′ writes and stores the extracted operation pattern in the operation pattern storage unit 26 ′ corresponding to each operation plan of each facility 200.

  The operation pattern evaluation unit 23 ′ reads out the storage battery deterioration model of each facility 200 from the storage battery deterioration model database 27. Then, the operation pattern evaluation unit 23 ′ evaluates the operation pattern for each facility 200 using the storage battery deterioration model, and writes and stores it as an operation pattern table in the operation pattern storage unit 26 ′. Similarly to the operation pattern evaluation unit 23, the operation pattern evaluation unit 23 ′ performs a comprehensive evaluation of the degree of “deterioration” of the storage battery 103 on the operation pattern table of each facility 200, and the most storage battery in all the facilities 200. An operation plan with a small degree of “deterioration” 103 is extracted for each facility 200. Then, the operation pattern evaluation unit 23 ′ supplies each extracted operation plan to the corresponding facility 200 via the network 300.

In the past data storage unit 25 ′, the power consumption, purchase power, generated power, and discharge for each predetermined time of the day in the past obtained by actual measurement corresponding to combinations of seasons, days of the week, weather, and the like. Data such as power and charging power is written and stored for each facility 200.
In the operation pattern storage unit 26 ′, an operation plan and an operation pattern table are written and stored corresponding to the facility operation plan identification information.
In the storage deterioration database 27 ′, a storage battery deterioration model table (similar to the configuration of FIG. 4) of the storage battery 103 in each facility 200 is written and stored in advance for each facility 200.

  As described above, according to the present embodiment, the deterioration of the storage battery 103 is most degraded in each facility 200 from a plurality of operation plans for the future evaluation target day for each facility 200 created by the operation plan creation unit 22 ′. Since it is possible to easily extract a small operation plan, it is possible to control the electrical equipment of the facility 200 with an operation plan in which the deterioration of the storage battery 103 of each facility 200 is small, and to suppress the degree of “deterioration” of the storage battery 103. Thereby, according to this embodiment, deterioration of the storage battery 103 of each plant | facility 200 can be suppressed, the lifetime of the storage battery 103 can be extended compared with the past, and the running cost of an electric power management system can be reduced.

  Further, the computer-readable recording of a program for realizing a function of creating an operation plan for reducing the degree of “deterioration” of the storage battery 103 in each of the power management system 2 in FIG. 2 and the power management system 2 ′ in FIG. The operation plan may be created by recording on a medium, reading the program recorded on the recording medium into a computer system, and executing the program. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within a scope not departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 2, 2 '... Power management system 3 ... Power management apparatus 21, 21' ... Data input / output part 22, 22 '... Operation plan preparation part 23, 23' ... Operation pattern evaluation part 24 ... Operation control part 25, 25 '... Past data storage unit 26, 26 '... Operation pattern storage unit 27, 27' ... Storage degradation database 100, 200 ... Facility 101 ... Solar cell 102 ... PCS
DESCRIPTION OF SYMBOLS 103 ... Storage battery 104 ... Inverter 105 ... Power path switching part 106 ... Load 300 ... Network AC ... Commercial power supply

Claims (5)

A power management system for extracting operation plan of electrical equipment containing put that solar cells and accumulators facility power from the grid is supplied,
An operation plan creation unit that creates an operation plan indicating an operation plan for each predetermined time unit that satisfies the demand forecast of the electrical equipment;
A deterioration database in which a storage battery deterioration model indicating a correspondence between a parameter that causes deterioration of the storage battery and a degree of deterioration of the storage battery is written and stored in advance,
An operation pattern evaluation unit for determining the degree of deterioration of the storage battery of the operation pattern in the operation plan by the storage battery deterioration model, and extracting the operation plan having the lowest degree of deterioration of the storage battery from the operation plan; and
The operation pattern evaluation unit, wherein the time range for evaluating the deterioration of the storage battery in the operation pattern, in this time range, and temperature conditions, whether power from the grid is used state, before Symbol solar cell Corresponding to the operating state of the battery, the ratio of the remaining capacity of the storage battery to the maximum capacity , and whether the storage battery is in a charge, discharge, or standby state, the storage battery in the operation pattern according to the storage battery deterioration model A power management system characterized by evaluating the degree of deterioration. The driving pattern evaluation unit
Comprehensive evaluation that extracts an operation pattern from the operation plan, determines the degree of deterioration of the storage battery for each time unit by the storage battery deterioration model, and indicates the degree of deterioration of the storage battery in all the time units in the operation plan The power management system according to claim 1, wherein the operation plan corresponding to the operation pattern of the comprehensive evaluation indicating that the comprehensive evaluation indicates that the degree of deterioration of the storage battery is the lowest is extracted. The degree of deterioration of the storage battery is associated with a combination of a plurality of parameters in the storage deterioration model that causes deterioration of the storage battery in the storage battery deterioration model. The power management system described in 1. The power management system according to claim 3, wherein the storage battery deterioration model includes a degree of deterioration due to a parameter in a cycle deterioration model that causes deterioration of the storage battery. A power management method for extracting operation plan of electrical equipment containing put that solar cells and accumulators facility power from the grid is supplied,
An operation plan creation process for creating an operation plan indicating an operation plan for each predetermined time unit, wherein the operation plan creation unit satisfies the demand forecast of the electrical equipment,
The operation pattern evaluation unit determines the degree of deterioration of the storage battery of the operation pattern in the operation plan, the parameter that causes the deterioration of the storage battery that is written and stored in advance in the deterioration database, and the degree of deterioration of the storage battery. An operation pattern evaluation process for determining by a storage battery deterioration model indicating correspondence, and extracting the operation plan having the lowest degree of deterioration of the storage battery from the operation plan,
The operation pattern evaluation unit, wherein the time range for evaluating the deterioration of the storage battery in the operation pattern, in this time range, and temperature conditions, whether power from the grid is used state, before Symbol solar cell Corresponding to the operating state of the battery, the ratio of the remaining capacity of the storage battery to the maximum capacity , and whether the storage battery is in a charge, discharge, or standby state, the storage battery in the operation pattern according to the storage battery deterioration model A power management method characterized by evaluating the degree of deterioration of a battery.

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