JP2016061516A - Air conditioning management device, charging/discharging control system, air conditioning control plan generation method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a temperature of a secondary battery in a proper temperature while suppressing power consumption of air conditioning equipment.SOLUTION: A control device 400 acquires a charging/discharging plane indicating a charging/discharging amount for each time of a battery pack 310 stored in a storage part from EMS (Energy Management System) 200. The control device 400 estimates a temperature for time of the battery pack 310 in a case of performing charging/discharging of the battery pack 310 on the basis of the charging/discharging plan. The control device 400 generates an air conditioning control plan indicating air conditioning control amount for each time of air conditioning equipment 330 for controlling air conditioning in the storage part, on the basis of an estimation result of temperature change.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning management device, a charge / discharge control system, an air conditioning control plan generation method, and a program for managing a secondary battery stored in a housing unit having an air conditioning facility.

  The use of secondary batteries such as lithium-ion batteries is being studied for smoothing the power output of power plants that use renewable energy and for peak cuts in demand power in communities such as buildings and towns. When a secondary battery is installed in a large-scale facility such as a power plant or a community, it is necessary to absorb a large power fluctuation. Therefore, a power storage system in which a plurality of secondary batteries are mounted in a container has been developed. It is known that a secondary battery deteriorates due to a temperature rise. In order to prevent the secondary battery from deteriorating, the power storage system is provided with an air conditioning facility for performing air conditioning control inside the container. Patent Document 1 discloses a technique for controlling the air conditioning of a container including a device that generates heat.

JP, 2014-072411, A

  In order to prevent the deterioration of the secondary battery, the air conditioning equipment may cool the inside of the container so that the temperature of the secondary battery is equal to or lower than the temperature at which the deterioration is promoted. On the other hand, if the air conditioning control amount by the air conditioning equipment is larger than necessary, the air conditioning power consumption increases and the introduction merit of the power storage system decreases. In order to keep the secondary battery at an appropriate temperature, it is necessary to set the set temperature of the air conditioning equipment to a temperature lower than the appropriate temperature, but specify how much the set temperature should be lower than the appropriate temperature. It was difficult to do.

  An object of the present invention is to provide an air conditioning management apparatus, a charge / discharge control system, and an air conditioning control plan generation method capable of generating an air conditioning control plan capable of keeping the temperature of the secondary battery at an appropriate temperature while suppressing power consumption of the air conditioning equipment. And to provide a program.

  A 1st aspect is a charging / discharging plan acquisition part which acquires the charging / discharging plan which shows the charging / discharging amount for every time of the secondary battery stored in the accommodating part, and charge of the said secondary battery based on the said charging / discharging plan. A temperature estimation unit that estimates the temperature of the secondary battery at each time when discharged, and an air conditioning control at each time of an air conditioning facility that controls the air conditioning in the housing unit based on the estimation result of the temperature change It is an air-conditioning management apparatus provided with the air-conditioning control plan production | generation part which produces | generates the air-conditioning control plan which shows quantity.

  Moreover, a 2nd aspect is further equipped with the weather information acquisition part which acquires the weather information of the area | region in which the said accommodating part was provided in a 1st aspect, The said temperature estimation part is charging / discharging based on the said charging / discharging plan. Is an air conditioning management device that estimates the temperature of each time of the secondary battery based on the amount of heat generated by the secondary battery and the amount of heat input to the housing estimated based on the weather information.

  Moreover, a 3rd aspect is a 1st or 2nd aspect. WHEREIN: The said temperature estimation part charges / discharges the said secondary battery based on the said charging / discharging plan, and the said air-conditioning control plan production | generation part produced | generated When the air conditioning control in the housing unit is performed based on the air conditioning control plan, the temperature of the secondary battery is estimated for each time, and the air conditioning control plan generation unit is configured to detect the temperature estimated by the temperature estimation unit at all times. In the air conditioning management device, the air conditioning control plan is continuously generated until the temperature becomes lower than the appropriate temperature of the secondary battery.

  Further, a fourth aspect is any one of the first to third aspects, wherein the storage unit stores therein a processing device that performs processing related to charging and discharging of the secondary battery, and the temperature estimation unit includes It is an air-conditioning management apparatus which estimates the temperature for every time of the said secondary battery and the said processing apparatus.

  Moreover, a 5th aspect WHEREIN: The air-conditioning instruction | command transmission part which transmits an air-conditioning instruction | command to the said air-conditioning equipment based on the air-conditioning control plan which the said air-conditioning control plan production | generation part produced | generated in any one of the 1st to 3rd aspects further It is an air conditioning management device provided.

  Moreover, a 6th aspect is further equipped with the temperature acquisition part which acquires the temperature in the said accommodating part in a 5th aspect, The said air conditioning command transmission part is the temperature which the said temperature acquisition part acquired, and the said temperature estimation part The air conditioning management for transmitting an air conditioning command for reducing the difference to the air conditioning equipment regardless of the air conditioning control plan when the difference from the temperature at which the estimated temperature is acquired is equal to or greater than a predetermined threshold value Device.

  Moreover, a 7th aspect is further equipped with the power consumption specific | specification part which specifies the power consumption of the said air conditioning equipment based on the said air conditioning control plan in any one of the 1st to 6th aspects, The said air conditioning control plan production | generation part Is an air conditioning management device that generates the air conditioning control plan so that the temperature of the secondary battery becomes lower than the appropriate temperature at all times and the power consumption specified by the power consumption specifying unit is reduced.

  According to an eighth aspect, in the seventh aspect, the storage unit includes a plurality of the secondary batteries, and the power consumption specifying unit is based on the charge / discharge plan acquired by the charge / discharge plan acquisition unit. It is an air-conditioning management apparatus further provided with the separate charging / discharging plan production | generation part which produces | generates the charging / discharging plan for every said secondary battery so that the power consumption which specifies may become small.

  In addition, a ninth aspect further includes a reduction instruction acquisition unit that acquires a reduction instruction indicating a time at which the power consumption of the air conditioning equipment should be reduced in any one of the first to eighth aspects, and the air conditioning control plan The generation unit is an air conditioning management device that decreases an air conditioning control amount at a time indicated by the reduction instruction and increases an air conditioning control amount at a time before the time.

  Moreover, a 10th aspect is equipped with the air-conditioning management apparatus and the charging / discharging plan production | generation apparatus which produces | generates the said charging / discharging plan in a 9th aspect, The said charging / discharging plan production | generation apparatus is the upper limit of supply electric power, and a demand. A charge / discharge plan generation unit that generates the charge / discharge plan so as to cause the secondary battery to discharge the power of the difference from the power; the power consumption of the air conditioning facility based on the air conditioning control plan generated by the air conditioning management device; and When there is a time when the sum of power demands exceeds the upper limit value, the charge / discharge control system includes a reduction instruction generation unit that generates a reduction instruction to reduce power consumption of the air conditioning equipment at the time.

  Moreover, an eleventh aspect is a step of acquiring a charge / discharge plan indicating a charge / discharge amount for each time of the secondary battery stored in the accommodating portion, and charging / discharging the secondary battery based on the charge / discharge plan. An air conditioner that indicates an air conditioning control amount for each time of the air conditioning equipment that controls the air conditioning in the housing unit based on the estimation result of the temperature change and the step of estimating the temperature of the secondary battery for each time when performed And an air conditioning control plan generation method including a step of generating a control plan.

  In a twelfth aspect, the computer is configured to acquire a charge / discharge plan indicating a charge / discharge amount for each time of the secondary battery stored in the storage unit, the charge / discharge plan acquisition unit based on the charge / discharge plan. A temperature estimation unit that estimates the temperature of the secondary battery at each time when the secondary battery is charged and discharged, and a time of air conditioning equipment that controls the air conditioning in the housing unit based on the estimation result of the change in temperature It is a program for functioning as an air-conditioning control plan production | generation part which produces | generates the air-conditioning control plan which shows the amount of air-conditioning control.

  The air conditioning management apparatus according to at least one of the above aspects generates an air conditioning control plan based on a change in temperature of the secondary battery over time based on the charge / discharge plan. Thereby, the air conditioning equipment can maintain the temperature of the secondary battery at an appropriate temperature while suppressing power consumption by controlling the air conditioning in the housing based on the air conditioning control plan.

It is a schematic block diagram which shows the structure of the output smoothing system which concerns on 1st Embodiment. It is a schematic block diagram which shows the structure of the control apparatus which concerns on 1st Embodiment. It is a flowchart which shows the production | generation method of the air-conditioning control plan which concerns on 1st Embodiment. It is a flowchart which shows the control method of the output smoothing system by the control apparatus which concerns on 1st Embodiment. It is a schematic block diagram which shows the structure of the control apparatus which concerns on 2nd Embodiment. It is a flowchart which shows the production | generation method of the air-conditioning control plan which concerns on 2nd Embodiment. It is a flowchart which shows the control method of the output smoothing system by the control apparatus which concerns on 2nd Embodiment. It is a schematic block diagram which shows the structure of the peak cut system which concerns on 3rd Embodiment. It is a schematic block diagram which shows the structure of the control apparatus which concerns on 3rd Embodiment. It is a flowchart which shows the production | generation method of the air-conditioning control plan which concerns on 3rd Embodiment. It is a schematic block diagram which shows the structure of the computer which concerns on at least 1 embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings.
<< First Embodiment >>
FIG. 1 is a schematic block diagram showing a configuration of an output smoothing system 1 according to the first embodiment.
The output smoothing system 1 according to the present embodiment is a device that smoothes the power generated by the power generation facility 100 that generates power using renewable energy and supplies the power to the power system. The output smoothing system 1 includes a power generation facility 100, an EMS 200 (Energy Management System), and a power storage system 300.

The power generation facility 100 generates power using renewable energy and supplies the generated power to the power system.
The EMS 200 predicts the power generation amount for each time of the power generation facility 100 based on weather information and the like, and generates a charge / discharge plan indicating the charge / discharge amount for each time of the power storage system 300 based on the power generation amount. Specifically, the EMS 200 predicts the power generation output of the power generation facility 100 based on weather information, power generation information of the power generation facility 100, past performance information of the power generation facility 100, and the like. And EMS200 produces | generates a charging / discharging plan based on the prediction result of generated electric power, the grid connection requirement, and the information of the charging rate of the assembled battery 310 with which the electrical storage system 300 is provided. The grid interconnection requirement is a rule that defines how smooth the generated power of the power generation facility 100 should be.

The power storage system 300 includes a plurality of assembled batteries 310, a power converter 320 corresponding to each assembled battery 310, an air conditioning facility 330, and a control device 400 inside the container. A container is an example of a storage unit.
The assembled battery 310 is obtained by connecting a plurality of cell batteries 311 that are secondary batteries such as lithium ion batteries in series. The assembled battery 310 includes a BMS 312 (Battery Management System) that manages its own state. The BMS 312 measures the temperature and voltage of each cell battery 311 and estimates the charging rate.
The power converter 320 is connected to the assembled battery 310, converts the power output from the assembled battery 310 into AC power, and outputs the AC power to the power system. The power converter 320 is an example of a processing device that performs processing related to charging / discharging of the assembled battery 310.
The air conditioning equipment 330 controls the air conditioning in the container based on the set temperature, the air volume, and the wind direction set by the control device 400. The air conditioning equipment 330 measures the temperature in the container and controls the air conditioning so that the temperature becomes a set temperature.

The control device 400 determines the charge / discharge amount of each assembled battery 310 based on the power generated by the power generation facility 100 and controls the power converter 320. Moreover, the control apparatus 400 produces | generates the air-conditioning control plan of the air-conditioning equipment 330 based on the charging / discharging plan which EMS200 produced | generated. The control device 400 controls the air conditioning equipment 330 based on the generated air conditioning control plan and the temperature of the assembled battery 310. The control device 400 is an example of an air conditioning management device.
FIG. 2 is a schematic block diagram illustrating the configuration of the control device 400 according to the first embodiment. The control device 400 includes a charge / discharge plan acquisition unit 401, an individual charge / discharge plan generation unit 402, a weather information acquisition unit 403, a temperature estimation unit 404, an air conditioning control plan generation unit 405, a power consumption specifying unit 406, and a smoothed power calculation unit 407. A charge / discharge power determination unit 408, a charge / discharge command transmission unit 409, a temperature acquisition unit 410, and an air conditioning command transmission unit 411.

The charge / discharge plan acquisition unit 401 acquires, from the EMS 200, a charge / discharge plan indicating the total charge / discharge amount for each time of the plurality of assembled batteries 310.
The individual charge / discharge plan generation unit 402 generates a charge / discharge plan indicating the charge / discharge amount for each time of each assembled battery 310 based on the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401. For example, the individual charge / discharge plan generation unit 402 divides the total charge / discharge amount indicated by the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401 by the number of the assembled batteries 310, thereby charging / discharging each assembled battery 310 for each time. A charge / discharge plan indicating the quantity is generated.
The weather information acquisition unit 403 acquires the weather information of the area where the container is installed from the EMS 200. The meteorological information is used for estimating the generated power of the power generation facility 100 by the EMS 200. The weather information includes the outside temperature and the amount of solar radiation for each time.

  Based on the charging / discharging plan acquired by the charging / discharging plan acquisition unit 401 and the weather information acquired by the weather information acquisition unit 403, the temperature estimation unit 404 determines the temperature in the container and the temperature of each assembled battery 310 and each power converter 320. Is estimated. Specifically, the temperature estimation unit 404 estimates the heat generation amount of each assembled battery 310 and each power converter 320 for each time based on the charge / discharge plan. Moreover, the temperature estimation part 404 estimates the heat input of a container based on weather information. Then, the temperature estimation unit 404 simulates the transition of the temperature in the container and the temperature of each assembled battery 310 and each power converter 320 based on the heat input amount of the container and the heat generation amount of the assembled battery 310 and the power converter 320. . Moreover, when the air-conditioning control plan production | generation part 405 produces | generates the air-conditioning control plan, the temperature estimation part 404 is based on charging / discharging plan, meteorological information, and charging / discharging plan, the temperature in a container, each assembled battery 310, and each power conversion Estimate the temperature of the vessel 320. In this case, the temperature estimation unit 404 simulates the airflow in the container based on the temperature, the wind direction, and the air volume of the cold air supplied from the air conditioning equipment 330. The temperature estimation unit 404 simulates the transition of the temperature in the container and the temperature of each assembled battery 310 and each power converter 320 in consideration of heat exchange by the airflow.

The air conditioning control plan generation unit 405 generates an air conditioning control plan indicating the air conditioning control amount for each time of the air conditioning equipment 330 based on the estimation result of the temperature change by the temperature estimation unit 404. Specifically, the air conditioning control plan generation unit 405 increases the air conditioning control amount at the time when the estimated temperature of the assembled battery 310 or the power converter 320 becomes higher than the appropriate temperature, and the estimated assembled battery 310 or power conversion. The air conditioning control plan is generated by reducing the air conditioning control amount at the time when the temperature of the vessel 320 is lower than the appropriate temperature. Here, the appropriate temperature includes, for example, a temperature at which deterioration of the assembled battery 310 is not promoted, and a temperature at which the inverter performs an operation according to performance.
The power consumption specifying unit 406 specifies the power consumption of the air conditioning equipment 330 for the air conditioning control plan generated by the air conditioning control plan generating unit 405.

  The smoothed power calculation unit 407 calculates the smoothed power to be charged / discharged in the assembled battery 310 for smoothing the generated power based on the current and past generated power of the power generation facility 100. As a method of calculating the smoothed power, for example, a method of calculating the smoothed power by subtracting the current generated power from the average value of the generated power during a predetermined period in the past.

The charge / discharge power determination unit 408 determines the power to charge / discharge each assembled battery 310 by dividing the generated power calculated by the smoothed power calculation unit 407 by the number of the assembled batteries 310.
The charge / discharge command transmission unit 409 transmits a charge / discharge command to charge / discharge the assembled battery 310 with the power determined by the charge / discharge power determination unit 408 to the power converter 320.

The temperature acquisition unit 410 acquires the temperature of each assembled battery 310 from the BMS 312 of each assembled battery 310. The temperature acquisition unit 410 acquires the temperature in the container from the air conditioning equipment 330.
The air conditioning command transmission unit 411 transmits an air conditioning command (set temperature, air volume, and wind direction) to the air conditioning equipment 330 based on the air conditioning control plan generated by the air conditioning control plan generation unit 405 and the temperature acquired by the temperature acquisition unit 410. Specifically, the air conditioning command transmission unit 411 generates an air conditioning command according to the air conditioning control plan, and the difference between the temperature acquired by the temperature acquisition unit 410 and the temperature estimated by the temperature estimation unit 404 is greater than or equal to a predetermined threshold value. In this case, an air conditioning command for reducing the difference is transmitted.

Next, the operation of the control device 400 according to the present embodiment will be described. First, a method for generating an air conditioning control plan by the control device 400 will be described.
FIG. 3 is a flowchart illustrating a method for generating an air conditioning control plan according to the first embodiment.
If EMS200 produces | generates a charging / discharging plan, the charging / discharging plan acquisition part 401 of the control apparatus 400 will acquire a charging / discharging plan from EMS200 (step S1). Next, the individual charge / discharge plan generation unit 402 divides the charge / discharge amount at each time indicated by the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401 by the number of the assembled batteries 310, thereby An individual charge / discharge plan is generated (step S2). Next, the temperature estimation unit 404 heats each assembled battery 310 and each power converter 320 when charging / discharging each assembled battery 310 based on the charge / discharge plan generated by the individual charge / discharge plan generating unit 402. Is estimated (step S3).

  The weather information acquisition unit 403 acquires weather information from the EMS 200 (step S4). Next, the temperature estimation unit 404 estimates the heat input amount of the container for each time based on the weather information acquired by the weather information acquisition unit 403 (step S5). Next, the temperature estimation unit 404 estimates the temperature in the container and each time of the assembled battery 310 and each power converter 320 based on the estimated heat generation amount and heat input amount (step S6). Specifically, the temperature estimation unit 404 performs temperature estimation by performing a heat balance simulation using a model of a container in which the assembled battery 310 and the power converter 320 are arranged.

  Next, the air conditioning control plan generation unit 405 indicates the air conditioning control amount for each time of the air conditioning equipment 330 based on the temperature of each battery pack 310 and each power converter 320 for each time estimated by the temperature estimation unit 404. A control plan is generated (step S7). Specifically, the air-conditioning control plan generation unit 405 turns on the power supply of the air-conditioning equipment 330 at the time when the assembled battery 310 or the power converter 320 higher than the appropriate temperature exists at each time, and reduces the set temperature. Then, at least one of the increase of the air volume or the control of the wind direction in the direction of the assembled battery 310 or the power converter 320 is performed. At this time, the set temperature is set to a value lower than the appropriate temperature of the assembled battery 310. Moreover, the air-conditioning control plan production | generation part 405 turns off the power supply of the air-conditioning equipment 330, when the assembled battery 310 or the power converter 320 higher than appropriate temperature does not exist. Note that the air conditioning control plan generation unit 405 generates a plurality of air conditioning control plans with different air conditioning control amounts at each time. The power consumption specifying unit 406 calculates the power consumption of the air conditioning equipment 330 for each air conditioning control plan generated by the air conditioning control plan generating unit 405 (step S8).

  Next, based on the air conditioning control plan generated by the air conditioning control plan generation unit 405, the temperature estimation unit 404 again estimates the temperature in the container and each time of the assembled battery 310 and each power converter 320 (step S9). ). Specifically, the temperature estimation unit 404 estimates the temperature by performing a heat balance simulation in consideration of the flow of cold air from the air conditioning equipment 330 in the model of the container in which the assembled battery 310 and the power converter 320 are arranged. I do.

As a result of the simulation by the temperature estimation unit 404 based on the air conditioning control plan among the plurality of air conditioning control plans, the air conditioning control plan generation unit 405 determines that the temperatures of all the assembled batteries 310 and the power converters 320 are appropriate temperatures at all times. It is determined whether there is an air conditioning control plan that will be described below (step S10). If the air conditioning control plan generation unit 405 determines that there is no air conditioning control plan in which the temperature of all the assembled batteries 310 and the power converter 320 is lower than the appropriate temperature at all times (step S10: NO), the process is stepped. Returning to S7, a plurality of air conditioning control plans are generated again. That is, the air conditioning control plan generation unit 405 continues to generate the air conditioning control plan until the temperature estimated by the temperature estimation unit 404 becomes equal to or lower than the appropriate temperature of the assembled battery 310 at all times.
Note that the air conditioning control plan generation unit 405 can generate a new air conditioning control plan from a plurality of previously generated air conditioning control plans, for example, based on a genetic algorithm. Specifically, for each previously generated air conditioning control plan, the sum of the difference between the estimated temperature and the appropriate temperature is calculated as the fitness, and selection, crossover or mutation is calculated based on the fitness. Thus, a new air conditioning control plan can be generated.

  The air conditioning control plan generation unit 405 determines that there is an air conditioning control plan in which the temperatures of all the assembled batteries 310 and the power converter 320 are equal to or lower than the appropriate temperatures at all times (step S10: YES), all the assembled batteries. Among the air-conditioning control plans in which the temperatures of 310 and the power converter 320 are equal to or lower than the appropriate temperatures at all times, the one that minimizes the power consumption specified by the power consumption specifying unit 406 is specified (step S11).

And the control apparatus 400 controls the air-conditioning equipment 330 based on the air-conditioning control plan specified by step S11. FIG. 4 is a flowchart illustrating a control method of the output smoothing system 1 by the control device 400 according to the first embodiment.
When the current time comes to the start time indicated by the charge / discharge plan by EMS 200, the smoothed power calculation unit 407 of the control device 400 acquires the generated power from the power generation facility 100 (step S51). The smoothed power calculation unit 407 calculates the smoothed power to be charged / discharged by the assembled battery 310 for smoothing the generated power based on the acquired generated power (step S52). Next, the charge / discharge power determination unit 408 determines the power to charge / discharge each assembled battery 310 by dividing the generated power calculated by the smoothed power calculation unit 407 by the number of assembled batteries 310 (step S53). . Next, the charge / discharge command transmission unit 409 transmits to the power converter 320 a charge / discharge command for charging / discharging the assembled battery 310 with the power determined by the charge / discharge power determination unit 408 (step S54). As a result, the output smoothing system 1 can smooth the power generated by the power generation facility 100 and supply it to the power system.

  On the other hand, the temperature acquisition unit 410 acquires the temperature of the assembled battery 310 and the temperature in the container from the BMS 312 and the air conditioning equipment 330 of the assembled battery 310 (step S55). Next, the air conditioning command transmission unit 411 determines whether the difference between the temperature of the assembled battery 310 or the temperature in the container and the temperature at the current time estimated by the temperature estimation unit 404 is within a predetermined threshold. (Step S56).

  When the difference between the actual temperature and the estimated temperature is within a predetermined threshold (step S56: YES), the air conditioning command transmission unit 411 sets the air conditioning control plan generation unit 405 to the air conditioning control plan specified in step S11. The following air conditioning command is transmitted to the air conditioning equipment 330 (step S57). That is, when the temperature in the assembled battery 310 or the container is close to the estimated temperature, the control device 400 controls the air conditioning according to the air conditioning control plan generated based on the estimation.

  On the other hand, if the difference between the actual temperature and the estimated temperature is larger than the predetermined threshold (step S56: NO), the air conditioning command transmission unit 411 determines the air conditioning control plan specified in step S11 by the air conditioning control plan generation unit 405. Regardless, the air conditioning command for reducing the difference is transmitted to the air conditioning equipment 330 (step S58). Specifically, when the temperature of the assembled battery 310 is higher than the estimated temperature by a predetermined threshold or more, the air conditioning command transmission unit 411 sends an air conditioning command of an air conditioning control amount larger than the air conditioning control amount indicated by the air conditioning control plan to the air conditioning equipment 330. Send to. In addition, even when the power is turned off in the air conditioning control plan, if the temperature of the assembled battery 310 is higher than the estimated temperature by a predetermined threshold or more, the air conditioning command transmission unit 411 transmits an air conditioning command to turn off the power. do not do. Thereby, even when the charge / discharge amount of the assembled battery 310 is different from the charge / discharge plan, the temperature of the assembled battery 310 and the power converter 320 can be kept below the appropriate temperature. Further, when the temperature of the assembled battery 310 is lower than the estimated temperature by a predetermined threshold or more, the air conditioning command transmission unit 411 turns off the air conditioning command of the air conditioning control amount that is smaller than the air conditioning control amount indicated by the air conditioning control plan or turns off the power. The command is transmitted to the air conditioning equipment 330. Thereby, the control apparatus 400 can reduce the power consumption of the air conditioning equipment 330.

  Next, the control device 400 determines whether or not the current time has reached the end time indicated by the charge / discharge plan by the EMS 200 (step S59). If the current time is before the end time (step S59: NO), control device 400 returns the process to step S51, and continues the smoothing control and air conditioning control of the generated power. On the other hand, when the current time reaches the end time (step S59: YES), the control device 400 ends the process.

  Thus, according to this embodiment, the control apparatus 400 estimates the temperature for every time of the assembled battery 310 based on a charging / discharging plan, and produces | generates an air-conditioning control plan based on the said estimation result. Thereby, the air conditioning equipment 330 can maintain the temperature of the secondary battery at an appropriate temperature while suppressing power consumption by controlling the air conditioning according to the air conditioning control plan.

<< Second Embodiment >>
Next, a second embodiment will be described.
The control device 400 of the output smoothing system 1 according to the first embodiment divides the charging / discharging amount for each time indicated by the charging / discharging plan generated by the EMS 200 by the number of the assembled batteries 310, and thereby each assembled battery 310. Generate a charge / discharge plan. That is, in the output smoothing system 1 according to the first embodiment, all the assembled batteries 310 operate with the same charge / discharge amount.

  It is known that the power converter 320 has different power conversion efficiency depending on the amount of power to be converted. In general, the conversion efficiency of the power converter 320 is worse as the power to be converted is lower. Therefore, when the total charge / discharge amount at a certain time indicated by the charge / discharge plan is small, if the charge / discharge of all the assembled batteries 310 is used to cover the total charge / discharge amount, the efficiency of the power converter 320 is poor, and the power storage system 300 Power consumption may be high. Therefore, the control device 400 of the output smoothing system 1 according to the present embodiment changes the number of assembled batteries 310 to be charged / discharged based on the charge / discharge plan generated by the EMS 200 in view of the conversion efficiency of the power converter 320. Let

FIG. 5 is a schematic block diagram showing the configuration of the control device 400 according to the second embodiment.
The control device 400 according to the present embodiment is different from the first embodiment in the operations of the individual charge / discharge plan generation unit 402 and the charge / discharge power determination unit 408.
Based on the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401, the individual charge / discharge plan generation unit 402 generates a charge / discharge plan for each secondary battery so that the efficiency of the power converter 320 is maximized.
The charge / discharge power determination unit 408 identifies the charge / discharge power based on the charge / discharge plan generated by the individual charge / discharge plan generation unit 402 and the smoothed power calculated by the smoothed power calculation unit 407.

Next, the operation of the control device 400 according to the present embodiment will be described. First, a method for generating an air conditioning control plan by the control device 400 will be described. Note that steps for performing the same processing as in the first embodiment will be described using the same reference numerals.
FIG. 6 is a flowchart illustrating a method for generating an air conditioning control plan according to the second embodiment.
If EMS200 produces | generates a charging / discharging plan, the charging / discharging plan acquisition part 401 of the control apparatus 400 will acquire a charging / discharging plan from EMS200 (step S1). Next, the individual charge / discharge plan generation unit 402 divides the charge / discharge amount at each time indicated by the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401 by the charge / discharge amount at which the power converter 320 is most efficient. Thus, the number of the assembled batteries 310 to be charged / discharged is specified, and an individual charging / discharging plan is generated for the assembled battery 310 (step S102). At this time, the individual charge / discharge plan generating unit 402 generates a plurality of patterns of individual charge / discharge plans with different combinations of the assembled batteries 310 to be charged / discharged. Examples of the pattern include a pattern in which the assembled battery 310 closest to the air conditioning equipment 330 is continuously operated, and a pattern in which the assembled battery 310 to be operated is changed so that the SOC (State Of Charge) is uniform.

  Next, for each pattern of the charge / discharge plan generated by the individual charge / discharge plan generation unit 402, the temperature estimation unit 404 charges each of the battery packs 310 and each of the battery packs 310 when the battery pack 310 is charged / discharged based on the pattern. The amount of heat generated by the power converter 320 is estimated (step S103).

  The weather information acquisition unit 403 acquires weather information from the EMS 200 (step S4). Next, the temperature estimation unit 404 estimates the heat input amount of the container for each time based on the weather information acquired by the weather information acquisition unit 403 (step S5). Next, the temperature estimation unit 404 estimates the temperature in the container and each time of the assembled battery 310 and each power converter 320 for each individual charge / discharge plan pattern based on the estimated heat generation amount and heat input amount. (Step S106).

  Next, the air conditioning control plan generation unit 405 generates an air conditioning control plan for each charging / discharging plan pattern based on the temperature estimation result for each charging / discharging plan pattern by the temperature estimation unit 404 (step S107). The power consumption specifying unit 406 calculates the power consumption of the air conditioning equipment 330 for each air conditioning control plan generated by the air conditioning control plan generating unit 405 (step S8). Next, based on the air conditioning control plan generated by the air conditioning control plan generation unit 405, the temperature estimation unit 404 again estimates the temperature in the container and each time of the assembled battery 310 and each power converter 320 (step S9). ).

  As a result of the simulation by the temperature estimation unit 404 based on the air conditioning control plan among the plurality of air conditioning control plans, the air conditioning control plan generation unit 405 determines that the temperatures of all the assembled batteries 310 and the power converters 320 are appropriate temperatures at all times. It is determined whether or not there is an air conditioning control plan that will be described below (step S110). If the air conditioning control plan generation unit 405 determines that there is no air conditioning control plan in which the temperatures of all the assembled batteries 310 and the power converters 320 are lower than the appropriate temperatures at all times (step S110: NO), the process is stepped. Returning to S102, a plurality of individual charge / discharge plan patterns are generated again, and an air conditioning control plan is generated based on the patterns. That is, the air conditioning control plan generation unit 405 continues to generate the air conditioning control plan until the temperature estimated by the temperature estimation unit 404 becomes equal to or lower than the appropriate temperature of the assembled battery 310 at all times. The individual charge / discharge plan generation unit 402 can generate a new air conditioning control plan from a plurality of previously generated air conditioning control plans, for example, based on a genetic algorithm.

  The air conditioning control plan generation unit 405 determines that there is an air conditioning control plan in which the temperatures of all the assembled batteries 310 and the power converters 320 are equal to or lower than the appropriate temperatures at all times (step S110: YES), all the assembled batteries. Among the air conditioning control plans in which the temperatures of 310 and the power converter 320 are equal to or lower than the appropriate temperatures at all times, the one with the minimum power consumption specified by the power consumption specifying unit 406 is specified. Further, the individual charge / discharge plan generation unit 402 identifies the pattern of the charge / discharge plan that is the basis of the air conditioning control plan (step S111).

  And the control apparatus 400 controls the air conditioner 330 based on the charging / discharging plan and air conditioning control plan which were identified by step S111. FIG. 7 is a flowchart illustrating a control method of the output smoothing system 1 by the control device 400 according to the second embodiment. Note that steps for performing the same processing as in the first embodiment will be described using the same reference numerals.

  When the current time comes to the start time indicated by the charge / discharge plan by EMS 200, the smoothed power calculation unit 407 of the control device 400 acquires the generated power from the power generation facility 100 (step S51). The smoothed power calculation unit 407 calculates the smoothed power to be charged / discharged by the assembled battery 310 for smoothing the generated power based on the acquired generated power (step S52). Next, the charge / discharge power determination unit 408 identifies the assembled battery 310 to be charged / discharged based on the individual charge / discharge plan identified by the individual charge / discharge plan generation unit 402 in step S111 (step S152). Next, the charge / discharge power determination unit 408 determines the power to charge / discharge each assembled battery 310 by dividing the generated power calculated by the smoothed power calculation unit 407 by the number of assembled batteries 310 to be charged / discharged. (Step S153). Next, the charge / discharge command transmission unit 409 transmits a charge / discharge command for charging / discharging the assembled battery 310 with the power determined by the charge / discharge power determining unit 408 to the power converter 320 corresponding to the identified assembled battery 310 ( Step S154). As a result, the output smoothing system 1 can smooth the generated power of the power generation facility 100 and supply it to the power system so that the conversion efficiency of the power converter 320 does not decrease.

  On the other hand, the temperature acquisition unit 410 acquires the temperature of the assembled battery 310 and the temperature in the container from the BMS 312 and the air conditioning equipment 330 of the assembled battery 310 (step S55). Next, the air conditioning command transmission unit 411 determines whether the difference between the temperature of the assembled battery 310 or the temperature in the container and the temperature at the current time estimated by the temperature estimation unit 404 is within a predetermined threshold. (Step S56).

  When the difference between the actual temperature and the estimated temperature is within a predetermined threshold (step S56: YES), the air conditioning command transmission unit 411 sets the air conditioning control plan generation unit 405 to the air conditioning control plan specified in step S11. The following air conditioning command is transmitted to the air conditioning equipment 330 (step S57).

  On the other hand, if the difference between the actual temperature and the estimated temperature is larger than the predetermined threshold (step S56: NO), the air conditioning command transmission unit 411 determines the air conditioning control plan specified in step S111 by the air conditioning control plan generation unit 405. Regardless, the air conditioning command for reducing the difference is transmitted to the air conditioning equipment 330 (step S58). Next, the control device 400 determines whether or not the current time has reached the end time indicated by the charge / discharge plan by the EMS 200 (step S59). If the current time is before the end time (step S59: NO), control device 400 returns the process to step S51, and continues the smoothing control and air conditioning control of the generated power. On the other hand, when the current time reaches the end time (step S59: YES), the control device 400 ends the process.

  Thus, according to this embodiment, the control apparatus 400 produces | generates an air-conditioning control plan based on the charging / discharging plan planned so that the conversion efficiency of the power converter 320 may become high. Thereby, power storage system 300 can maintain the temperature of the secondary battery at an appropriate temperature while suppressing power consumption of air conditioning equipment 330 and power converter 320.

<< Third Embodiment >>
FIG. 8 is a schematic block diagram showing the configuration of the peak cut system 2 according to the third embodiment.
The peak cut system 2 according to the present embodiment is a device that controls so that the power supplied from the power system does not exceed a predetermined upper limit value in a community such as a building or a town. The peak cut system 2 includes a community management device 500, an EMS 200, and a power storage system 300. The peak cut system 2 is an example of a charge / discharge control system.
The community management device 500 notifies the power storage system 300 of community demand power.

  The EMS 200 predicts the demand power for each time of the community based on weather information and the like, and generates a charge / discharge plan indicating the charge / discharge amount for each time of the power storage system 300 based on the demand power. Specifically, the EMS 200 predicts community power demand based on weather information, community demand power history, and the like. And EMS200 produces | generates a charging / discharging plan based on the prediction result of demand power, and the information of the charging rate of the assembled battery 310 with which the electrical storage system 300 is provided. The EMS 200 receives input of power consumption for each time of the air conditioning equipment 330 from the control device 400 of the power storage system 300, and performs control when the power supplied from the power system by the power consumption of the air conditioning equipment 330 exceeds the upper limit value. A reduction instruction indicating the time at which the power consumption of the air conditioning equipment 330 should be reduced is output to the apparatus 400.

  That is, the EMS 200 includes a charge / discharge plan generation unit that generates a charge / discharge plan so as to cause the secondary battery to discharge the power difference between the upper limit value of the supplied power and the demand power, and the air conditioning control plan generated by the control device 400. A reduction instruction generating unit that generates a reduction instruction to reduce the power consumption of the air conditioning equipment 330 at the time when there is a time when the sum of the power consumption and the demand power of the air conditioning equipment 330 based exceeds the upper limit value. .

The configuration of the power storage system 300 is the same as that of the power storage system 300 included in the output smoothing system 1 according to the first embodiment.
FIG. 9 is a schematic block diagram illustrating the configuration of the control device 400 according to the third embodiment. The control device 400 according to the third embodiment further includes a power consumption notification unit 412 and a reduction instruction acquisition unit 413 in addition to the configuration of the first embodiment.
The power consumption notification unit 412 notifies the EMS 200 of power consumption for each time when air conditioning is controlled based on the air conditioning control plan specified by the air conditioning control plan generation unit 405.
The reduction instruction acquisition unit 413 acquires a reduction instruction indicating the time at which the power consumption of the air conditioning equipment 330 should be reduced from the EMS 200.

Next, a method for generating an air conditioning control plan by the control device 400 according to the present embodiment will be described. Note that steps for performing the same processing as in the first embodiment will be described using the same reference numerals.
FIG. 10 is a flowchart illustrating a method for generating an air conditioning control plan according to the third embodiment.
If EMS200 produces | generates a charging / discharging plan, the control apparatus 400 will perform the process of step S1-step S11 demonstrated in 1st Embodiment, and the temperature of all the assembled batteries 310 and the power converters 320 will be all. Among the air-conditioning control plans that are below the appropriate temperature at the time, the one that consumes the minimum power is specified.

  Next, the power consumption notification unit 412 notifies the EMS 200 of power consumption for each time when air conditioning is controlled based on the air conditioning control plan specified by the air conditioning control plan generation unit 405 (step S212). Thus, the EMS 200 determines whether or not there is a time when the sum of the demand power of the community and the power consumption of the air conditioning equipment 330 exceeds a predetermined upper limit value at each time. When the EMS 200 determines that there is a time when the sum of the demand power and the power consumption of the air conditioning equipment 330 exceeds a predetermined upper limit value, the EMS 200 generates a reduction instruction that the power consumption of the air conditioning equipment 330 at that time should be reduced. To the control device 400.

  When the power consumption notification unit 412 notifies the EMS 200 of the power consumption of the air conditioning equipment 330 in step S212, the reduction instruction acquisition unit 413 determines whether a reduction instruction has been acquired from the EMS 200 (step S213). If the reduction instruction is not transmitted from the EMS 200 (step S213: NO), the power supplied from the power system does not exceed the upper limit value even if the power consumption of the air conditioner is added. The process ends without reexamining the control plan.

  On the other hand, when the reduction instruction acquisition unit 413 acquires a reduction instruction from the EMS 200 (step S213: YES), the air conditioning control plan generation unit 405 performs the reduction instruction based on the charge / discharge plan acquired by the charge / discharge plan acquisition unit 401. It is determined whether or not the assembled battery 310 is charged at the time indicated by (step S214). In the air conditioning control plan, when the assembled battery 310 is charged at the time indicated by the reduction instruction (step S214: YES), the individual charge / discharge plan generating unit 402 changes the charge / discharge plan so as not to charge the assembled battery 310 at the time. (Step S215). Thereby, the purchased power from the power system and the power consumption of the air conditioning equipment 330 can be reduced. The power consumption notification unit 412 notifies the EMS 200 of the change of the charge / discharge plan (step S216). Then, the EMS 200 performs power consumption determination again based on the changed charge / discharge plan. The control device 400 returns the process to step S213, and determines whether the EMS 200 has transmitted a reduction instruction.

  On the other hand, in the air conditioning control plan, when the assembled battery 310 is discharged or not charged / discharged at the time indicated by the reduction instruction (step S214: NO), the air conditioning control plan generation unit 405 indicates that the time indicated by the reduction instruction is It is determined whether or not it is the start time indicated by the charge / discharge plan generated by the EMS 200 (step S217). When the time indicated by the reduction instruction is not the start time (step S217: NO), the air conditioning control plan generation unit 405 decreases the air conditioning control amount at the time indicated by the reduction instruction in the air conditioning control plan identified at step S11, and The air conditioning control amount at the time before the time is increased (step S218). Thereby, the power consumption at the time when the power consumption exceeds the upper limit due to the power consumption of the air conditioning equipment 330 can be reduced, and the inside of the container can be cooled from the time before the time.

When the air conditioning control plan generating unit 405 changes the air conditioning control plan, the power consumption specifying unit 406 calculates the power consumption of the air conditioning equipment 330 based on the air conditioning control plan (step S219). And it returns to step S212 and makes EMS 200 perform determination of power consumption again.
On the other hand, when the time indicated by the reduction instruction is the start time (step S217: YES), it is determined that the air conditioning cannot be controlled so as not to exceed the upper limit value, and the air conditioning control plan specified in step S11 or step S218 is performed. Among the changed air conditioning control plans, the air conditioning control plan with the smallest power consumption is specified (step S220).

  Thus, according to the present embodiment, when the control device 400 acquires a reduction instruction from the EMS 200, the control apparatus 400 decreases the air conditioning control amount at the time indicated by the reduction instruction, and the air conditioning control amount at a time before the time. Increase. Thereby, the peak cut system 2 can maintain the temperature of the secondary battery at an appropriate temperature while preventing the electric power supplied from the power system from the power consumption of the air conditioning equipment 330 from exceeding the upper limit value.

  In addition, the control apparatus 400 which concerns on this embodiment divides the charging / discharging amount for every time which the charging / discharging plan which EMS200 produced | generated by the number of the assembled batteries 310 similarly to 1st Embodiment, Although the charging / discharging plan of the assembled battery 310 is produced | generated, it is not restricted to this. For example, similarly to the second embodiment, the control device 400 according to another embodiment may change the number of assembled batteries 310 to be charged / discharged in view of the conversion efficiency of the power converter 320.

As described above, the embodiment has been described in detail with reference to the drawings. However, the specific configuration is not limited to that described above, and various design changes and the like can be made.
For example, although the control apparatus 400 which concerns on embodiment mentioned above acquires weather information from EMS200, it is not restricted to this. For example, the control device 400 according to another embodiment may acquire weather information from another server device. Further, if the container can sufficiently insulate heat from the outside, the control device 400 may estimate the temperature without considering the amount of heat input from the outside of the container.

FIG. 11 is a schematic block diagram illustrating a configuration of a computer 900 according to at least one embodiment.
The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, and an interface 904.
The control device 400 and the EMS 200 described above are mounted on the computer 900. The operation of each processing unit described above is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads a program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program.

  In at least one embodiment, the auxiliary storage device 903 is an example of a tangible medium that is not temporary. Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected via the interface 904. When this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may develop the program in the main storage device 902 and execute the above processing.

  The program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 903.

  DESCRIPTION OF SYMBOLS 1 ... Output smoothing system 2 ... Peak cut system 100 ... Power generation equipment 200 ... EMS 300 ... Power storage system 310 ... Battery assembly 311 ... Cell battery 312 ... BMS 320 ... Power converter 330 ... Air-conditioning equipment 400 ... Controller 401 ... Charge / discharge Plan acquisition unit 402 ... Individual charge / discharge plan generation unit 403 ... Weather information acquisition unit 404 ... Temperature estimation unit 405 ... Air conditioning control plan generation unit 406 ... Power consumption specifying unit 407 ... Smoothing power calculation unit 408 ... Charge / discharge power determination unit 409 ... Charging / discharging command transmission unit 410 ... Temperature acquisition unit 411 ... Air conditioning command transmission unit 412 ... Power consumption notification unit 413 ... Reduction instruction acquisition unit 500 ... Community management device 900 ... Computer 901 ... CPU 902 ... Main storage device 903 ... Auxiliary storage device 904 ... Interface

Claims (12)

A charge / discharge plan acquisition unit for acquiring a charge / discharge plan indicating a charge / discharge amount for each time of the secondary battery stored in the housing unit;
A temperature estimation unit that estimates a temperature for each time of the secondary battery when the secondary battery is charged and discharged based on the charge / discharge plan;
An air-conditioning management apparatus comprising: an air-conditioning control plan generating unit that generates an air-conditioning control plan that indicates an air-conditioning control amount for each time of the air-conditioning equipment that controls air-conditioning in the housing unit based on the estimation result of the temperature change. A weather information acquisition unit for acquiring weather information of the area where the housing unit is provided;
The temperature estimation unit is configured to determine a time of the secondary battery based on a heat generation amount of the secondary battery due to charge / discharge based on the charge / discharge plan and a heat input amount of the housing unit estimated based on the weather information. The air conditioning management device according to claim 1, wherein the temperature for each is estimated. In the case where the temperature estimation unit performs charge / discharge of the secondary battery based on the charge / discharge plan and performs air-conditioning control in the housing unit based on the air-conditioning control plan generated by the air-conditioning control plan generation unit. Estimating the temperature of each time of the secondary battery,
The said air-conditioning control plan production | generation part continues the production | generation of an air-conditioning control plan until the temperature estimated by the said temperature estimation part becomes less than the appropriate temperature of the said secondary battery in all the time. Air conditioning management device. The storage unit stores therein a processing device that performs processing related to charging and discharging of the secondary battery,
The air conditioning management device according to any one of claims 1 to 3, wherein the temperature estimation unit estimates temperatures of the secondary battery and the processing device for each time. The air conditioning management device according to any one of claims 1 to 3, further comprising an air conditioning command transmission unit that transmits an air conditioning command to the air conditioning facility based on an air conditioning control plan generated by the air conditioning control plan generation unit. A temperature acquisition unit for acquiring the temperature in the housing unit;
The air conditioning command transmission unit determines whether the difference between the temperature acquired by the temperature acquisition unit and the temperature at the time of acquiring the temperature estimated by the temperature estimation unit is equal to or greater than a predetermined threshold. Regardless of this, an air conditioning command for reducing the difference is transmitted to the air conditioning equipment. A power consumption specifying unit for specifying the power consumption of the air conditioning equipment based on the air conditioning control plan;
The air conditioning control plan generation unit generates the air conditioning control plan so that the temperature of the secondary battery becomes lower than an appropriate temperature at all times and the power consumption specified by the power consumption specifying unit is reduced. The air-conditioning management apparatus according to any one of claims 6 to 7. The container includes a plurality of the secondary batteries,
Based on the charge / discharge plan acquired by the charge / discharge plan acquisition unit, an individual charge / discharge plan generation unit that generates a charge / discharge plan for each secondary battery so that the power consumption specified by the power consumption specification unit is reduced. The air conditioning management device according to claim 7. A reduction instruction acquiring unit that acquires a reduction instruction indicating a time at which the power consumption of the air conditioning facility should be reduced;
The said air-conditioning control plan production | generation part reduces the air-conditioning control amount of the time which the said reduction instruction | indication shows, and increases the air-conditioning control amount of the time before the said time. Air conditioning management device. An air conditioning management device according to claim 9,
A charge / discharge plan generating device for generating the charge / discharge plan,
The charge / discharge plan generating device is:
A charging / discharging plan generating unit that generates the charging / discharging plan so that the secondary battery discharges the power of the difference between the upper limit value of the supplied power and the demand power;
When there is a time when the sum of the power consumption of the air conditioning equipment and the demand power based on the air conditioning control plan generated by the air conditioning management device exceeds the upper limit value, the power consumption of the air conditioning equipment at that time should be reduced. A charge / discharge control system comprising: a reduction instruction generation unit that generates a reduction instruction to be performed. A step of acquiring a charge / discharge plan indicating a charge / discharge amount for each time of the secondary battery stored in the housing unit;
Estimating a temperature for each time of the secondary battery when the secondary battery is charged and discharged based on the charge / discharge plan;
Generating an air-conditioning control plan indicating an air-conditioning control amount for each time of the air-conditioning equipment that controls the air-conditioning in the housing based on the estimation result of the temperature change. Computer
A charge / discharge plan acquisition unit for acquiring a charge / discharge plan indicating a charge / discharge amount for each time of the secondary battery stored in the housing unit;
A temperature estimation unit that estimates the temperature of each time of the secondary battery when the secondary battery is charged and discharged based on the charge / discharge plan;
The program for functioning as an air-conditioning control plan production | generation part which produces | generates the air-conditioning control plan which shows the air-conditioning control amount for every time of the air-conditioning equipment which controls the air-conditioning in the said accommodating part based on the estimation result of the said temperature change.

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