JP7229901B2 - Self-consignment system and self-consignment method - Google Patents

Description

The present invention relates to a self-consignment system and a self-consignment method.

Conventionally, there is known a mechanism (hereinafter referred to as a self-consignment system) for transmitting power output from a power generation facility to a demand facility via a power system managed by a third party entity.

For example, in a self-consignment system, technology to increase the output power output from the power generation facility to the power system so that the demand power per unit time (for example, 30 minutes) does not exceed the threshold at the demand facility (hereafter, peak cut control) has been proposed (for example, Patent Document 1). Alternatively, in a self-consignment system, a technique has been proposed for interchanging power between two or more facilities so as to minimize costs such as power purchase costs, consignment costs, and self-generation costs (for example, Patent Document 2). .

JP 2017-163780 A JP 2017-211836 A

As described above, the peak cut control is a control that increases the actual value of the output power of the power generation facility so that the actual value of the power demand per unit time does not exceed the threshold. However, since the actual value of the output power and the actual value of the demand power are values that change from moment to moment, precise control is required in order to perform appropriate peak cut control. On the other hand, since the power generation facility and the demand facility are geographically separated from each other, it is assumed that the power generation facility will be required to perform control to bring the planned output power and the actual output power closer to each other.

As a result of intensive investigation of the above-mentioned situation, the inventors have found new knowledge that it is unlikely that a substantial problem will occur even if the actual value of output power is replaced with the planned value of output power in peak cut control. rice field.

Therefore, the present invention has been made to solve the above-described problems, and easily realizes appropriate peak cut control in a mechanism for transmitting power from a power generation facility to a demand facility through a power system. It is an object of the present invention to provide a self-consignment system and a self-consignment method.

In the self-consignment system according to the first feature, output from the power generation facility belonging to a predetermined entity to a demand facility belonging to the predetermined entity is output from the power generation facility via a power system managed by a third party entity. This is a self-consignment system that transmits electric power. The self-consignment system includes a power generation side device that manages the power generation facility and a demand side device that manages the demand facility. The demand-side device monitors the calculated value of the procured power so that the calculated value of the procured power assumed as the value of the power to be procured from the power system as the predetermined entity does not exceed a threshold during the target time. have a department. The calculated value of the procured power is the difference between the actual value of demand power supplied from the power system to the demand facility and the planned value of the output power output from the power generation facility to the power system.

In the self-consignment method according to the second feature, output from the power generation facility belonging to a predetermined entity to a demand facility belonging to the predetermined entity is output from the power generation facility via a power system managed by a third party entity. This is a method of self-consignment for transmitting electric power. The self-consignment method is such that a calculated value of procured electric power assumed as a value of electric power procured from the electric power system as the predetermined entity by the demand-side device that manages the demand facility does not exceed a threshold during the target time. and monitoring a calculated value of procured power, wherein the calculated value of procured power is an actual value of demand power supplied from the power system to the demand facility and output from the power generation facility to the power system. This is the difference from the planned output power.

According to the present invention, there is provided a self-consignment system and a self-consignment method that can easily realize appropriate peak cut control in a mechanism for transmitting electric power from a power generation facility to a demand facility via a power system. can do.

FIG. 1 is a diagram showing a self-consignment system 100 according to an embodiment. FIG. 2 is a diagram showing the power generation side device 500 according to the embodiment. FIG. 3 is a diagram showing a demand side device 600 according to the embodiment. FIG. 4 is a diagram for explaining allocation control according to the embodiment. FIG. 5 is a diagram for explaining allocation control according to the embodiment. FIG. 6 is a diagram showing the first message according to the embodiment. FIG. 7 is a diagram illustrating a second message according to the embodiment; FIG. 8 is a diagram showing a self-consignment method according to the embodiment. FIG. 9 is a diagram showing a self-consignment method according to the embodiment. FIG. 10 is a diagram showing a self-consignment system 100 according to Modification 1. As shown in FIG.

Embodiments will be described below with reference to the drawings. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, the drawings are schematic.

[Embodiment]
(self-consignment system)
The self-consignment system according to the embodiment will be described below. As shown in FIG. 1 , self-consignment system 100 includes power generation facility 200 , demand facility 300 , facility 400 , power generation side device 500 , demand side device 600 , and third party server 700 .

Here, the power generation facility 200 and the demand facility 300 belong to a given entity. Although not particularly limited, the predetermined entity is an entity that has two or more facilities in geographically separated locations. For example, the predetermined entity is a company having a large-scale production base, a company operating large-scale commercial facilities (for example, a railway company, etc.). A power generation facility 200 and a demand facility 300 are connected by a power system 20 managed by a third party entity different from the predetermined entity. For example, the third party entity is an entity such as a power company that manages the main power system (the power system 20 in FIG. 1), and may be a power generation business operator or a power transmission and distribution business operator. A third party entity may be an electricity retailer. Further, power generation facility 200 , demand facility 300 , facility 400 , power generation side device 500 , demand side device 600 and third party server 700 are connected by network 30 . Although not particularly limited, the network 30 may include an Internet network or a mobile communication network. The network 30 may include a VPN (Virtual Private Network).

A power generation facility 200 is a facility belonging to a predetermined entity. Power generation facility 200 is connected to power system 20 via power line 21 . Power line 21 may be a power line managed by a predetermined entity or may be part of power system 20 .

In FIG. 1 , as the power generation facility 200, a power generation facility 200A and a power generation facility 200B are illustrated. The power generation facility 200A and the power generation facility 200B may be provided at geographically separated positions. The power generation facility 200A has a distributed power source 210A, a PCS 220A, and an EMS 230A. The power generation facility 200B has a distributed power source 210B, a PCS 220B, and an EMS 230B. Since the power generation facility 200A and the power generation facility 200B have the same configuration, the power generation facility 200 will be described below without distinguishing between the power generation facility 200A and the power generation facility 200B.

The power generation facility 200 has a distributed power source 210 , a PCS (Power Conditioning System) 220 and an EMS (Energy Management System) 230 . The distributed power source 210 is a device that outputs electric power. Distributed power source 210 may be a device that outputs power using renewable energy. For example, distributed power source 210 may be a solar cell device. The PCS 220 is a power adjustment device that converts DC power output from the distributed power supply 210 into AC power. The EMS 230 manages power of the power generation facility 200 . EMS 230 may be provided by a cloud service. The EMS 230 has at least a function of communicating with the power generation device 500 .

Here, the power generation facility 200 may have a smart meter that measures the power output from the power generation facility 200 . The smart meter may have a function of communicating with the power generation device 500 .

The demand facility 300 is a facility belonging to a predetermined entity like the power generation facility 200 . In embodiments, more than one demand facility 300 may be provided. Demand facility 300 is connected to power system 20 via power line 22 . Power line 22 may be a power line managed by a predetermined entity and may be part of power system 20 .

Demand facility 300 has load 310 and EMS 320 . Load 310 consumes power supplied from power system 20 . For example, if demand facility 300 is a production site, load 310 may include production equipment. If demand facility 300 is a commercial facility, loads 310 may include air conditioners, lighting equipment, and the like. EMS 320 manages the power of demand facility 300 . EMS 320 may be provided by a cloud service. EMS320 has a function which communicates with the demand side apparatus 600 at least.

Here, the demand facility 300 may have a smart meter that measures the power supplied from the power system 20 to the demand facility 300 . The smart meter may have the function of communicating with the demand side device 600 .

Facility 400 is a facility managed by demand side device 600 . Facility 400 belongs to an entity different from the predetermined entity described above. Facility 400 has a load that consumes power supplied from power system 20 . For example, loads may include air conditioners, lighting equipment, and the like.

Here, facility 400 may have a smart meter that measures the power supplied to facility 400 from power system 20 . The smart meter may have the function of communicating with the demand side device 600 .

The power generation side device 500 is a device that manages the power generation facility 200 . The power generation side device 500 may manage the distributed power source 210 provided in the power generation facility 200 and may manage the PCS 220 provided in the power generation facility 200 . The entity managing the power generation device 500 may be different from the predetermined entity and the third party entity. For example, the power generation side device 500 may be a maintenance server that monitors the operating state of the distributed power sources 210 . Details of the power generation side device 500 will be described later (see FIG. 2).

The demand side device 600 is a device that manages the demand facility 300 and the facility 400 (hereinafter also referred to as facility group). The entity managing the demand side device 600 may be different from the predetermined entity and the third party entity. Such entities may be retailers or businesses such as resource aggregators. Such an entity may be a power producer or a power transmission and distribution operator. Details of the demand side device 600 will be described later (see FIG. 3).

The third party server 700 is a server that verifies various matters related to self-consignment. Self-consignment is a mechanism in which power output from the power generation facility 200 is transmitted from the power generation facility 200 to the demand facility 300 via the power system 20 . The entity managing the third party server 700 may be different from the predetermined entity and the third party entity. For example, such an entity may be the Cross-regional Electric Power Coordinator. The third party server 700 may be an electricity transmission and distribution company or an electricity retailer. For example, the third party server 700 confirms the following points.

First, the third party server 700 stores the planned output value of power output from the power generation facility 200 (synonymous with power transmitted by self-consignment) and the actual output value of power output from the power generation facility 200. You can check the difference between The planned output value and the actual output value are totaled for each unit time (for example, 30 minutes). A given entity may be penalized if the difference between the planned power output and the actual power output exceeds an acceptable threshold. An incentive may be given to a given entity if the difference between the planned output value and the actual output value does not exceed an acceptable threshold. Penalties and incentives may be monetary.

Secondly, the third party server 700 provides the total demand plan value of the power supplied from the power system 20 to the facilities managed by the demand side device 600 and the power supplied from the power system 20 to the facilities. You may check the difference with the total demand actual value of electric power. The total demand plan value and the total demand actual value are totaled for each unit time (for example, 30 minutes). An entity managing a given demand side device 600 may be penalized if the difference between the aggregate demand plan value and the aggregate demand actual value exceeds an acceptable threshold. Incentives may be provided to the entity managing the demand side device 600 if the difference between the aggregate demand plan value and the aggregate demand actual value does not exceed the allowable threshold. Penalties and incentives may be monetary.

Third, the third party server 700 stores the total procurement plan value procured from the power grid 20 for the facility group managed by the demand side device 600 and the total procurement plan value of the power procured from the power grid 20 for the facility group. Differences from actual values may be checked. The total planned procurement value and the total actual procurement value are aggregated for each unit time (for example, 30 minutes). A penalty may be imposed on the entity managing the demand-side device 600 if the difference between the total planned procurement value and the total actual procurement value exceeds an acceptable threshold. Incentives may be given to the entity managing the demand-side device 600 when the difference between the total planned procurement value and the total actual procurement value does not exceed the allowable threshold. Penalties and incentives may be monetary.

Here, the total procurement plan value is a value obtained by subtracting the output plan value from the total demand plan value. The total procurement performance value is a value obtained by subtracting the output performance value from the total demand performance value. Alternatively, the total actual procurement value may be a value obtained by subtracting the planned output value from the total actual demand value. Note that the total procurement plan value may be a value corrected in consideration of power transmission loss from the power generation facility 200 to the demand facility 300 . Alternatively, the planned output value may be a value corrected in consideration of power transmission loss from the power generation facility 200 to the demand facility 300 . Similarly, the total actual procurement value may be a value corrected in consideration of power transmission loss from the power generation facility 200 to the demand facility 300 . Alternatively, the actual output value may be a value corrected in consideration of power transmission loss from the power generation facility 200 to the demand facility 300 . Consideration of power transmission loss means subtracting a value corresponding to power transmission loss from the planned value or the actual value.

Fourthly, the third party server 700 may check the difference between the planned procurement value and the actual procurement value for the demand facility 300 . The planned procurement value and the actual procurement value are aggregated for each unit time (for example, 30 minutes). A penalty may be imposed on a given entity if the difference between the planned procurement value and the actual procurement value exceeds an acceptable threshold. An incentive may be given to a given entity if the difference between the planned procurement value and the actual procurement value does not exceed an acceptable threshold. Penalties and incentives may be monetary.

Here, the procurement plan value is a value obtained by subtracting the output plan value from the demand plan value of the electric power supplied from the power system 20 to the demand facility 300 . The actual procurement value is a value obtained by subtracting the actual output value from the actual demand value of the electric power supplied from the power system 20 to the demand facility 300 .

Although not particularly limited, communication within the power generation facility 200 may be performed according to the first protocol. As the first protocol, a protocol conforming to ECHONET Lite, SEP (Smart Energy Profile) 2.0, KNX, or an original dedicated protocol can be used. Communication between the power generation facility 200 and the power generation device 500 may be performed according to a second protocol different from the first protocol. As the second protocol, a protocol conforming to Open ADR (Automated Demand Response) or a unique dedicated protocol can be used.

Communications within demand facility 300 may be conducted according to a first protocol. As the first protocol, a protocol conforming to ECHONET Lite, SEP2.0, KNX, or a unique dedicated protocol can be used. Communication between demand facility 300 and demand-side device 600 may be performed according to a second protocol different from the first protocol. As the second protocol, a protocol conforming to Open ADR or a unique dedicated protocol can be used.

Communication between the power generation side device 500 and the demand side device 600, communication between the power generation side device 500 and the third party server 700, and communication between the demand side device 600 and the third party server 700 are performed using the second It may be done according to protocol.

Under such a background, the embodiment provides a mechanism for performing peak cut control of the demand facility 300 on the premise of self-consignment from the power generation facility 200 to the demand facility 300 . Peak cut control is control for suppressing the power demand supplied from the power system 20 to the demand facility 300 to a threshold value or less during a target time. The target time is a unit time (for example, 30 minutes) included in a predetermined period for which the output plan value and the demand plan value are determined. The predetermined period may be one day, one week, one month, or one year. The procured power is the power obtained by subtracting the output power from the demand power. It should be noted that the threshold used in peak cut control is a concept different from the allowable threshold described above.

Here, as a result of intensive studies, the inventors have focused on the point that the power generation facility 200 is required to perform control to bring the planned output value and the actual output value closer to each other. We found new knowledge that there is a low possibility that a substantial problem will occur even if it is replaced with the planned value of . In the embodiment, based on such new knowledge, the calculated value of the procured power is substituted for the demand power to be monitored in the peak cut control. The calculated value of the procured electric power is the difference between the actual value of power demand (actual demand value described above) and the planned value of output power (planned output value described above).

In such a case, the demand-side device 600 monitors the calculated value of procured power so that the calculated value of procured power does not exceed the threshold during the target time. Since the planned output value is determined in advance, the calculated value of the procured power is affected by the actual demand value (or expected demand value) that changes every moment. Therefore, the monitoring of the calculated value of the procured power may be considered as the monitoring of the actual demand value (or expected demand value).

For example, when there is one demand facility 300 , part or all of the planned output values of one or more power generation facilities 200 are allocated to the one demand facility 300 . When there are two or more demand facilities 300 , part or all of the planned output values of one or more power generation facilities 200 are allocated to each of the two or more demand facilities 300 .

(Power generation side device)
The power generation side device according to the embodiment will be described below. As shown in FIG. 2 , the power generation device 500 has a communication section 510 , a management section 520 and a control section 530 .

Communication unit 510 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a/b/g/n, ZigBee, Wi-SUN, LTE, 5G, etc., or a wired communication module conforming to standards such as IEEE802.3. may be

The communication unit 510 receives from the power generation facility 200 the planned output value aggregated for each unit time. The planned output value may be a planned output value for a predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, if the predetermined period is one day, the communication unit 510 receives the planned output value for the n-th day at any timing before the (n−1)-th day.

The communication unit 510 may receive from the power generation facility 200 the actual output value that is aggregated for each unit time. The output performance value may be an output performance value for a predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, if the predetermined period is one day, the communication unit 510 receives the actual output value on the nth day at any timing after the n+1th day.

The communication unit 510 may receive from the power generation facility 200 an output measurement value of power output from the power generation facility 200 . In such a case, the actual output value is obtained by summing up the measured output values for each unit time. The communication unit 510 may receive the output measurement value at time intervals shorter than the unit time (for example, 1 minute).

The communication unit 510 transmits to the third party server 700 the planned output values that are totaled for each unit time. The communication unit 510 transmits to the demand-side device 600 the planned output value aggregated for each unit time. For example, if the predetermined period is one day, the communication unit 510 transmits the planned output value for the n-th day at any timing before the (n−1)-th day.

The communication unit 510 transmits to the third party server 700 the actual output values that are totaled for each unit time. The communication unit 510 may transmit the actual output value aggregated for each unit time to the demand side device 600 . For example, if the predetermined period is one day, the communication unit 510 transmits the actual output value on the nth day at any timing after the n+1th day.

Hereinafter, a message including a first power information element related to power output from the power generation facility 200 to the power grid 20 for the purpose of self-consignment will be referred to as a first message. The first message is a message sent from the power generation side device 500 to the demand side device 600 . The first message includes at least the output plan value described above. The first message may include an information element indicating at least one of the measured output value and the actual output value. Details of the first message will be described later (FIG. 6).

The communication unit 510 may receive the operating state of the distributed power supply 210 from the power generation facility 200 . The operating state may include at least one of the output power of distributed power supply 210 and the output power of PCS 220 . The operating state may include information indicating whether the distributed power sources 210 are operating normally, and may include information indicating whether the PCS 220 is operating normally.

The management unit 520 includes a memory such as a nonvolatile memory and/or a storage medium such as a HDD (Hard disc drive), and stores various information.

The management unit 520 manages planned output values and actual output values. The management unit 520 may manage the measured output value and the expected output value. The expected output value is an actual output value (expected value) expected at the time when the unit time expires. The management unit 520 may manage the operating state of the distributed power sources 210 .

Control unit 530 may include at least one processor. The at least one processor may be comprised of a single integrated circuit (IC) or may be comprised of multiple circuits (such as integrated circuits and/or discrete circuits) communicatively coupled.

The control unit 530 controls the elements that make up the power generation side device 500 . For example, the control unit 530 instructs the communication unit 510 to transmit the planned output value and the actual output value. If the actual output value is expected to deviate from the planned output value at the end of the unit time, control unit 530 may perform output power control to bring the actual output value closer to the planned output value. Such output power control may include control to increase or decrease the output power of PCS 220 .

Here, control unit 530 may determine whether or not the actual output value diverges from the planned output value at the time when the unit time expires, based on the expected output value. The control unit 530 may estimate the expected output value based on the transition of the measured output value per unit time. The controller 530 may estimate the expected output value by linear prediction of the measured output value. The control unit 530 may estimate the expected output value by machine learning of the correlation between the measured output value and the attribute. Attributes may include time of day, day of the week, season, weather (insolation, temperature, humidity, etc.).

In the embodiment, in the case where two or more demand facilities 300 are provided, the control unit 530 sets the planned output value so that the calculated value of the procured power does not exceed the threshold value in each of the two or more demand facilities 300 during the target time. Allocation control may be performed to assign to each of two or more demand facilities 300 . In a case where two or more power generation facilities 200 are provided, the control unit 530 may allocate the planned output value of each of the two or more power generation facilities 200 to each of the two or more demand facilities 300 in allocation control. In such allocation control, the control unit 530 may execute allocation control based on the demand planning values of the two or more demand facilities 300 before the target time. In other words, the execution timing of the allocation control is after the timing of formulating the output plan value and the demand plan value and before the start of the predetermined period for which the output plan value and the demand plan value are to be produced.

(demand side equipment)
The demand side device according to the embodiment will be described below. As shown in FIG. 3 , the demand side device 600 has a communication section 610 , a management section 620 and a control section 630 .

Communication unit 610 is configured by a communication module. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a/b/g/n, ZigBee, Wi-SUN, LTE, 5G, etc., or a wired communication module conforming to standards such as IEEE802.3. may be

The communication unit 610 may receive, from each of the facilities included in the facility group, a demand plan value for power supplied from the power system to each of the facilities (the demand facility 300 and the facility 400) included in the facility group. The demand plan value may be aggregated for each unit time. The demand plan value may be a demand plan value for a predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, if the predetermined period is one day, the communication unit 610 receives the demand plan value for the n-th day at any timing before the (n−1)-th day.

The communication unit 610 receives, from each of the facility group, the actual demand value of power supplied from the power system to each of the facilities included in the facility group. The actual demand value may be aggregated for each unit time. The actual demand value may be a actual demand value for a predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, if the predetermined period is one day, the communication unit 610 receives the actual demand value on the nth day at any timing after the n+1th day.

The communication unit 610 may receive aggregate demand measurements from the facilities for the facilities. In such a case, the aggregate demand actual value is obtained by summing up the aggregate demand measurement values for each unit time. The communication unit 510 may receive demand measurement values at time intervals shorter than the unit time (for example, 1 minute).

The communication unit 610 may receive demand measurements from the demand facility 300 for the demand facility 300 . In such a case, the actual demand value is obtained by aggregating the demand measurement values for each unit time. The communication unit 510 may receive demand measurement values at time intervals shorter than the unit time (for example, 1 minute).

Hereinafter, a message including a second power information element related to power output from demand facility 300 to power system 20 for the purpose of self-consignment will be referred to as a second message. The second message is a message sent from the demand side device 600 to the power generation side device 500 . The second message includes at least the demand plan value described above. The second message may include an information element indicating at least one of the measured demand value and the actual demand value. Details of the second message will be described later (FIG. 7).

The communication unit 610 transmits to the third party server 700 the total procurement plan value of the facility group, which is aggregated for each unit time. The total procurement plan value may be a total procurement plan value covering a predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, if the predetermined period is one day, the communication unit 610 transmits the total procurement plan value for the nth day at any timing before the n−1th day.

The communication unit 610 transmits to the third party server 700 the total procurement performance value of the facility group, which is aggregated for each unit time. For example, if the predetermined period is one day, the total procurement plan value may be the total procurement plan value covering the predetermined period. The predetermined period may be one day, one week, one month, or one year. For example, when the predetermined period is one day, the communication unit 610 transmits the total procurement performance value on the nth day at any timing after the n+1th day.

The communication unit 610 transmits to the third party server 700 the procurement plan value of the demand facility 300 that is aggregated for each unit time. For example, if the predetermined period is one day, the communication unit 610 transmits the n-th procurement plan value at any timing before the (n-1)-th day.

The communication unit 610 transmits to the third party server 700 the actual procurement value of the demand facility 300 that is aggregated for each unit time. For example, if the predetermined period is one day, the communication unit 610 transmits the actual procurement value on the nth day at any timing after the n+1th day.

The communication unit 610 may transmit to the third-party server 700 the total demand plan value of the facility group that is aggregated for each unit time. For example, if the predetermined period is one day, the communication unit 610 transmits the total demand plan value for the n-th day at some timing before the n-1th day.

The communication unit 610 may transmit to the third party server 700 the total actual demand value of the facility group, which is aggregated for each unit time. For example, when the predetermined period is one day, the communication unit 610 transmits the actual total demand value on the nth day at any timing after the n+1th day.

The communication unit 610 may receive the operating state of the load 310 from the demand facility 300 . The communication unit 610 may receive the operating state of the load 310 provided in the facility 400 from the facility 400 . The operating state may include the power consumption of load 310 . The operating state may include information indicating whether the load 310 is operating normally.

The management unit 620 includes a memory such as a nonvolatile memory and/or a storage medium such as a HDD (Hard disc drive), and stores various information.

The management unit 620 manages the total planned procurement value and the total actual procurement value for the facility group. The management unit 620 may manage the planned procurement value and actual procurement value for the demand facility 300 . The management unit 620 may manage the planned total demand value and actual total demand value for the facility group. The management unit 620 may manage the planned demand value and the actual demand value for the demand facility 300 . The management unit 620 may manage aggregate demand measurements, aggregate demand forecasts, demand measurements and demand forecasts. The expected total demand value is an actual expected total demand value (expected value) at the end of the unit time. The expected demand value is an actual demand value (expected value) assumed at the time when the unit time expires. Management unit 620 may manage the operating state of load 310 .

Control unit 630 may include at least one processor. The at least one processor may be comprised of a single integrated circuit (IC) or may be comprised of multiple circuits (such as integrated circuits and/or discrete circuits) communicatively coupled.

Control unit 630 controls the elements that make up demand-side device 600 . For example, the control unit 630 instructs the communication unit 610 to transmit the total planned procurement value and the total actual procurement value for the facility group. The control unit 630 may instruct the communication unit 610 to transmit the planned procurement value and actual procurement value for the demand facility 300 .

The control unit 630 may instruct the communication unit 510 to transmit the planned total demand value and actual total demand value. If the actual total demand value is expected to deviate from the planned total demand value at the end of the unit time, the control unit 630 may perform control to bring the actual total demand value closer to the planned total demand value. Such controls may include controls that increase or decrease the power consumption of loads provided at facility 400 .

Here, the control unit 630 may determine whether or not the total demand actual value deviates from the total demand plan value at the time when the unit time expires, based on the total demand forecast value. The control unit 630 may estimate the expected total demand value based on the transition of the measured total demand value per unit time. The controller 630 may estimate the expected aggregate demand by linear prediction of aggregate demand measurements. The control unit 630 may estimate the expected total demand value by machine learning of the correlation between the measured total demand value and the attributes. Attributes may include time of day, day of week, and season.

Similarly, the control unit 630 may instruct the communication unit 510 to transmit the planned demand value and the actual demand value. If the actual demand value is expected to deviate from the planned demand value at the end of the unit time, the control unit 630 may perform control to bring the actual demand value closer to the planned demand value. Such control may include control to increase or decrease the power consumption of load 310 .

Here, the control unit 630 may determine whether or not the actual demand value diverges from the planned demand value at the time when the unit time expires, based on the expected demand value. The control unit 630 may estimate the expected demand value based on the transition of the measured demand value per unit time. The control unit 630 may estimate the expected demand value by linear prediction of the measured demand value. The control unit 630 may estimate the expected demand value by machine learning of the correlation between the measured demand value and the attribute. Attributes may include time of day, day of week, and season.

In the embodiment, the control unit 630 monitors the calculated value of the procured power assumed as the value of the power to be procured from the power system 20 as the predetermined entity so that the calculated value of the procured power does not exceed the threshold during the target time. As described above, the calculated value of the procured power is the difference between the actual demand value and the planned output value. When two or more demand facilities 300 are provided, the control unit 630 performs the monitoring described above for each demand facility 300 .

Furthermore, the control unit 630 may perform power demand control to control the power demand during the target time so that the calculated value of the procured power does not exceed the threshold during the target time. As described above, the calculated value of the procured power is the difference between the actual demand value and the planned output value. Therefore, if it is assumed that the calculated value of procured power obtained by subtracting the planned output value from the actual demand value will exceed the threshold at the end of the target time, it is necessary to decrease the calculated value of procured power. Such power demand control includes control of the power consumption of loads provided in the demand facility 300 . When two or more demand facilities 300 are provided, the control unit 630 executes demand power control for each demand facility 300 .

Here, assuming a case where the planned output value is allocated so that the calculated value of the procured power does not exceed the threshold during the target time, if the actual demand value matches the planned demand value, the calculated value of the procured power will exceed the threshold value. never exceed. Therefore, the control to bring the actual demand value closer to the planned demand value may be considered as an example of power demand control.

The monitoring of the calculated value of the procured power and the demand power control described above are examples of the peak cut control described above.

(allocation control)
Allocation control according to the embodiment will be described below. Here, a power generation facility A and a power generation facility B are provided as the power generation facility 200, and a demand facility A and a demand facility B are provided as the demand facility 300, as an example.

In such a case, consider a situation where the demand planning values for demand facility A and demand facility B are the values shown in FIG.

As shown in FIG. 4, for demand facility A, the demand planning value significantly exceeds the threshold at unit time N and unit time N+1, and the demand planning value slightly exceeds the threshold at unit time N+2. Therefore, for demand facility A, in order to realize a situation in which the calculated value of procured power does not exceed the threshold, it is necessary to allocate a large value as the planned output value for unit time N and unit time N+1. A small value should be assigned as the value.

On the other hand, for demand facility B, the planned demand value is below the threshold at unit time N, the planned demand value slightly exceeds the threshold at unit time N+1, and the planned demand value significantly exceeds the threshold at unit time N+2. Over. Therefore, for demand facility B, in order to realize a situation in which the calculated value of procured power does not exceed the threshold, there is no need to allocate a planned output value in unit time N, and a small value can be assigned as a planned output value in unit time N+1. It is necessary to assign a large value as the planned output value in unit time N+2.

Here, the power generation side device 500 executes allocation control based on the demand plan values shown in FIG. As described above, allocation control is control for allocating the planned output value to each of the two or more demand facilities 300 so that the calculated value of the procured power does not exceed the threshold for the target time in each of the two or more demand facilities 300. .

For example, as shown in FIG. 5, the power generation side device 500 allocates all of the planned output value of the power generation facility A and part of the planned output value of the power generation facility B to the demand facility A in the unit time N and the unit time N+1. , the remainder of the planned output value of power generation facility B is allocated to demand facility B. On the other hand, the power generation side device 500 allocates part of the planned output value of the power generation facility A and all of the planned output value of the power generation facility B to the demand facility B at the unit time +2, and assigns the remaining planned output value of the power generation facility A to the demand facility B. to demand facility A.

FIG. 5 merely illustrates an example of allocation control. Allocation control should be executed so that the calculated value of the procured electric power does not exceed the threshold at each of the two or more demand facilities 300 during the target time. For example, in unit time N, the calculated value of the procured electric power of demand facility B does not exceed the threshold, so it is not necessary to allocate a planned output value to demand facility B.

Furthermore, if not all of the power generation facility's planned output value needs to be allocated to any demand facility, and if the calculated value of the procured power does not exceed the threshold, part of the power generation facility's planned output value may be allocated to a third party. may be sold to private entities.

(first message and second message)
The first message and the second message according to the embodiment will be described below.

First, the first message will be described with reference to FIG. As described above, the first message is a message sent from the power generation device 500 to the demand side device 600 .

As shown in FIG. 6, the first message includes power generation facility identification information, demand facility identification information, and first power information.

The power generation facility identification information is an information element that identifies the power generation facility 200 related to self-consignment with respect to the first power information included in the first message.

The demand facility identification information is an information element that identifies the demand facility 300 related to self-consignment with respect to the first power information included in the first message.

The first power information includes at least a planned output value. Here, the planned output value is the planned output value allocated to each demand facility 300 after the allocation control described with reference to FIGS. 4 and 5 is executed. That is, the planned output value is a value assigned to each demand facility 300 so as to be distinguishable. The first power information may include an information element indicating at least one of the measured output value and the actual output value. The measured output value and the actual output value may be values to be grasped by the demand side device 600 instead of values assigned to each demand facility 300 .

For example, in a case where two or more demand facilities 300 are provided, as shown in FIG. It may contain more than a set of information elements. Similarly, in cases where two or more power generation facilities 200 are provided, the first message may contain two or more sets of information elements. Furthermore, the power generation facility identification information may be configured to include information elements that identify each of the two or more power generation facilities 200 . The first message only needs to have a mode in which the planned output values assigned to the demand facilities 300 can be grasped for each demand facility 300 . The first message may not include the power generation facility identification information.

However, if the first power information includes a measured output value or actual output value, the first message may include a set of information elements.

Second, the second message will be described with reference to FIG. As described above, the second message is a message sent from demand side device 600 to power generation side device 500 .

As shown in FIG. 7, the second message includes demand facility identification information, power generation facility identification information, route information, and second power information.

Since the demand facility identification information and the power generation facility identification information are the same as the information elements included in the above-described first message, detailed description thereof will be omitted.

The second power information includes at least a demand plan value. The demand plan value is a value formulated so that each demand facility 300 can be distinguished. The second power information may include an information element indicating at least one of the measured demand value and the actual demand value. The measured demand value and the actual demand value may be values that should be grasped by the demand-side device 600 instead of the values formulated so as to be able to distinguish between the demand facilities 300 .

For example, in a case where two or more demand facilities 300 are provided, as shown in FIG. It may contain more than a set of information elements. Similarly, in cases where two or more power generation facilities 200 are provided, the second message may contain two or more sets of information elements. Furthermore, the power generation facility identification information may be configured to include information elements that identify each of the two or more power generation facilities 200 . The second message may have a form in which the demand planning value assigned to each demand facility 300 can be grasped. The second message may not include the power generation facility identification information.

However, if the second power information includes a demand measurement value or a demand actual value, the second message may include one set of information elements.

Here, the power generation facility identification information and the demand facility identification information are examples of information elements for identifying loss in the power system 20 with respect to power transmitted from the power generation facility 200 to the demand facility 300 by self-consignment. A loss in power system 20 may be identified by the demand facility identification information, or may be identified by both the power generation facility identification information and the demand facility identification information. The loss in the power system 20 may be represented by the amount of loss (loss amount) or may be represented by the rate of loss (loss rate). Here, the loss in power system 20 may be fixedly determined by the voltage level of the power line to which demand facility 300 is connected. For example, the low voltage loss rate may be 7.1%, the high voltage loss rate may be 4.2%, and the extra high voltage loss rate may be 2.9%.

In this way, at least one of the first message and the second message may contain an information element for identifying loss in the power system 20 with respect to power transmitted by self-consignment. Therefore, if the loss can be identified by the demand facility identification information, at least one of the first message and the second message may not include the power generation facility identification information.

(Self-consignment method)
First, regarding the self-consignment method according to the embodiment, the flow of notifying the third party server 700 of the planned values will be described.

As shown in FIG. 8, the power generation facility 200 transmits the planned output value to the power generation side device 500 in step S11.

In step S<b>12 , the power generation side device 500 transmits the planned output value received from the power generation facility 200 to the third party server 700 .

In step S<b>13 , the third party server 700 manages the planned output value received from the power generation side device 500 .

In step S<b>14 , the demand facility 300 transmits the total demand plan value to the demand side device 600 .

In step S<b>15 , the facility 400 transmits the total demand planning value to the demand side device 600 . According to such processing, the demand side device 600 can acquire the total demand plan value.

In step S<b>16 , the power generation device 500 receives the second message from the demand side device 600 . Here, the second message includes demand plan values in a manner that allows each demand facility 300 to be distinguished. The power generation device 500 may grasp the procurement plan value of the demand facility 300 based on the second message.

In step S17, the power generation side device 500 allocates the planned output value to each of the two or more demand facilities 300 so that the calculated value of the procured power does not exceed the threshold value in each of the two or more demand facilities 300 during the target time. Execute control. The power generation side device 500 executes allocation control based on the demand plan value included in the second message.

In step S<b>18 , the demand side device 600 receives the first message from the power generation side device 500 . Here, the first message includes the planned output value in a manner that allows each demand facility 300 to be distinguished.

In step S<b>19 , the demand side device 600 transmits display data for displaying the planned output value to the demand facility 300 . Here, the display data may be data for displaying the planned output value reflecting the loss occurring in the power system 20 . The display data may be data for displaying a planned output value that can identify the loss that occurs in the power system 20 .

In step S20, the demand facility 300 displays the planned output value based on the display data. The planned output value (GUI; Graphical User Interface) may be in a form in which the loss occurring in the power system 20 is reflected, or may be in a form in which the loss occurring in the power system 20 can be specified.

In step S21, the demand side device 600 manages the total procurement plan value.

In step S<b>22 , the demand side device 600 transmits the total procurement plan value to the third party server 700 . Demand side device 600 may transmit procurement plan values for demand facility 300 to third party server 700 .

In step S<b>23 , third party server 700 manages the total procurement plan value received from demand side device 600 . Third party server 700 may manage procurement plan values for demand facility 300 .

Secondly, regarding the self-consignment method according to the embodiment, the flow of notifying the third party server 700 of the actual value will be described.

As shown in FIG. 7, the power generation side device 500 and the demand side device 600 may execute steps S30A and 30B as a pre-stage of the flow of notifying the actual value.

In step S30A, the power generation side device 500 performs output power control to bring the actual output value closer to the planned output value for each power generation facility 200 when it is assumed that the actual output value deviates from the planned output value at the time when the unit time expires. may be executed.

In step S30B, the demand side device 600 executes peak cut control for each demand facility 300. FIG. Specifically, for each demand facility 300, the demand-side device 600 calculates the calculated value of the procured power (which may be considered as the expected demand value) so that the calculated value of the procured power does not exceed the threshold at the time when the unit time expires. to monitor. The demand-side device 600 executes demand power control for each demand facility 300 so that the calculated value of the procured power does not exceed the threshold during the target time at the expiration of the unit time. The power demand control may include control to bring the actual demand value closer to the planned demand value.

In step S<b>31 , the power generation facility 200 transmits the actual output value to the power generation side device 500 .

In step S<b>32 , the power generation device 500 transmits the actual output value received from the power generation facility 200 to the third party server 700 .

In step S<b>33 , demand-side device 600 receives the first message from demand-side device 600 . Here, the first message includes an information element indicating the actual output value as the first power information.

In step S<b>34 , the demand side device 600 transmits display data for displaying the actual output value to the demand facility 300 . Here, the display data may be data for displaying the actual output value reflecting the loss occurring in the power system 20 . The display data may be data for displaying output performance values that can identify losses occurring in the power system 20 .

In step S35, the demand facility 300 displays the actual output value based on the display data. The actual output value (GUI; Graphical User Interface) may be in a mode that reflects the loss that occurs in the power system 20, or may be in a mode that allows the loss that occurs in the power system 20 to be specified.

In step S<b>36 , the demand facility 300 transmits the total actual demand value to the demand side device 600 .

In step S<b>37 , the facility 400 transmits the actual total demand value to the demand side device 600 .

In step S<b>38 , the power generation device 500 receives the second message from the demand side device 600 . Here, the second message includes an information element indicating the actual demand value of the demand facility 300 as the second power information. The power generation device 500 may grasp the actual procurement value of the demand facility 300 based on the second message.

In step S<b>39 , the demand side device 600 transmits the total actual demand value to the third party server 700 . The demand side device 600 may transmit the actual demand value for the demand facility 300 to the third party server 700 .

In step S40, the third party server 700 may check the difference between the planned output value and the actual output value. The third party server 700 may check the difference between the total demand plan value and the total demand actual value. The third party server 700 may check the difference between the total planned procurement value and the total actual procurement value for the facility group. The third party server 700 may check the difference between the planned procurement value and the actual procurement value for the demand facility 300 .

Here, the total procurement plan value is specified by the information received from the demand side device 600 in step S21. The total procurement performance value is specified by the output performance value received from the power generation side device 500 in step S32 and the total demand performance value received from the demand side device 600 in step S39. The procurement performance value is identified by the output performance value received from the power generation side device 500 in step S32 and the demand performance value received from the demand side device 600 in step S39.

(Action and effect)
In the embodiment, the demand power to be monitored by peak cut control is determined based on the new knowledge that even if the actual output value is replaced with the planned output value in peak cut control, it is unlikely that a substantial problem will occur. is substituted by the calculated value of The calculated value of procured power is the difference between the actual demand value and the planned output value. According to such a configuration, as a parameter to be controlled by peak cut control, it is sufficient to monitor the calculated value of procured power (that is, the actual demand value) without being conscious of the actual output value that changes from moment to moment. Therefore, the control load associated with peak cut control is reduced, and an improvement in the accuracy of peak cut control can be expected.

In the embodiment, the power generation side device 500 allocates the planned output value to each of the two or more demand facilities 300 so that the calculated value of the procured power in each of the two or more demand facilities 300 does not exceed the threshold during the target time. Execute control. According to such a configuration, it is possible to reduce the possibility that the calculated value of the procured power exceeds the threshold.

In the embodiment, the demand-side device 600 performs power demand control to control the power demand so that the calculated value of the procured power does not exceed the threshold during the target time at the expiration of the unit time. According to such a configuration, it is possible to reduce the possibility that the calculated value of the procured power exceeds the threshold.

In the embodiment, the demand power to be monitored in the peak cut control is replaced with the calculated value of the procured power. According to such a configuration, the control for bringing the actual demand value closer to the planned demand value is considered an example of power demand control. In other words, peak cut control is implemented as part of the purpose of preventing the difference between the actual demand value and the planned demand value from exceeding the allowable threshold.

[Modification 1]
Modification 1 of the embodiment will be described below. In the following, mainly the differences with respect to the embodiments will be described.

Modification 1 illustrates a case where an auxiliary power source provided in self-consignment system 100 is provided. The auxiliary power supply may be a power supply controllable by the power generation side device 500 or a power supply controllable by the demand side device 600 .

As shown in FIG. 10, the power generation facility 200 has a power storage device 240 and a PCS 250 in addition to the configuration shown in FIG. Demand facility 300 has power storage device 340 and PCS 350 in addition to the configuration shown in FIG. Since other configurations are the same as those in FIG. 1, description thereof will be omitted.

The power storage device 240 is a device that stores electric power, and is an example of an auxiliary power source that can be controlled by the power generation device 500 . The PCS 250 converts the DC power output from the power storage device 240 into AC power, or converts the AC power supplied from the power system 20 into DC power.

Power storage device 340 is a device that stores electric power, and is an example of an auxiliary power supply controllable by demand-side device 600 . The PCS 350 converts the DC power output from the power storage device 340 into AC power, or converts the AC power supplied from the power system 20 into DC power.

In such a case, when the actual output value deviates from the planned output value, the power generation side device 500 controls the power storage device 240 (or the PCS 250) so that the actual output value approaches the planned output value. Similarly, when the actual demand value deviates from the planned demand value, the demand-side device 600 controls the power storage device 340 (or the PCS 350) so that the actual demand value approaches the planned demand value.

In such a case, the demand side device 600 may control the power storage device 340 in demand power control of each demand facility 300 . The power storage device 340 is an example of a distributed power supply used in power demand control. Such a distributed power supply is not limited to the power storage device 340, and may include a solar cell device or a fuel cell device.

[Modification 2]
Modification 2 of the embodiment will be described below. In the following, mainly the differences with respect to the embodiments will be described.

In Modification 2, the power generation device 500 performs allocation control based on the loss that occurs in the power system 20 for power transmitted by self-consignment. On the premise that a loss occurs in the power system 20, the power generation side device 500 subtracts a value corresponding to the loss from the planned output value, and then adjusts the planned output value so that the calculated value of the procured power does not exceed the threshold during the target time. assign. Here, since the loss is determined by the combination of the power generation facility 200 and the demand facility 300, the loss used in the allocation control may differ for each demand facility 300 to which the planned output value is allocated.

[Other embodiments]
Although the present invention has been described by the above-described embodiments, the statements and drawings forming part of this disclosure should not be construed as limiting the present invention. Various alternative embodiments, implementations and operational techniques will become apparent to those skilled in the art from this disclosure.

In the embodiments, the case where distributed power sources 210 are solar cell devices has been mainly described. However, embodiments are not so limited. The distributed power source 210 may be a distributed power source whose output power may vary depending on the external environment (eg, weather, temperature, humidity, etc.). Distributed power source 210 may be a distributed power source that outputs power using renewable energy. Distributed power sources 210 may include wind power plants, hydro power plants, biomass power plants, and geothermal power plants.

In the embodiment, the power generation side device 500 is exemplified as the device that manages the power generation facility 200 . However, embodiments are not so limited. The device managing the power generation facility 200 may be the EMS 230 .

In the embodiment, the power generation device 500 performs output power control. However, embodiments are not so limited. EMS230 provided in each power generation facility 200 may be sufficient as the execution subject of output power control.

In the embodiment, the demand side device 600 is exemplified as the device that manages the demand facility 300 . However, embodiments are not so limited. The device managing demand facility 300 may be EMS 320 .

In the embodiment, the demand side device 600 performs demand power control. However, embodiments are not so limited. The EMS 320 provided in each demand facility 300 may be the executing entity of power demand control.

In the embodiment, the case where the demand facility 300 belongs to the same predetermined entity as the power generation facility 200 has been exemplified. However, embodiments are not so limited. Demand facility 300 may belong to an entity different from the predetermined entity.

In the embodiment, the power generation device 500 receives the planned output value from the power generation facility 200 . However, embodiments are not so limited. The power generation side device 500 may formulate the planned output value by itself. For example, the power generation side device 500 may formulate a planned output value based on actual output values for the last few days. The power generation side device 500 may formulate the planned output value by machine learning of the correlation between the output power of the power generation facility 200 and the attribute. Although not particularly limited, the attributes may be parameters that affect the output power of distributed power sources 210 (eg, time of day, day of the week, season, weather, temperature, humidity, etc.).

In an embodiment, demand side device 600 receives demand plan values from demand facility 300 . However, embodiments are not so limited. The demand side device 600 may formulate its own demand plan value (total demand plan value). For example, the demand-side device 600 may formulate a demand plan value (total demand plan value) based on the actual demand value (total demand actual value) for the last several days. The demand side device 600 may formulate a demand plan value by machine learning of the correlation between the power demand and the attributes of the demand facility 300 . Although not particularly limited, the attribute may be a parameter (time of day, day of the week, season, etc.) that affects the power demand of the demand facility 300 .

Although not specifically mentioned in the embodiment, the power generation side device 500 may acquire the actual output value by integrating the measured output values. The demand-side device 600 may acquire the actual demand value (projected total demand actual value) by accumulating the demand measurement values.

Although not particularly mentioned in the embodiments, the machine learning described above may include so-called deep learning. Furthermore, machine learning may be performed using AI (Artificial intelligence).

Although not specifically mentioned in the embodiment, the power generation facility 200 may have a load. In such a case, the planned output value may be the difference between the planned output power value of the PCS 220 and the planned demand power value of the load. Similarly, the actual output value may be the difference between the actual output power value of the PCS 220 and the actual demand power value of the load.

Although not specifically mentioned in the embodiment, the demand facility 300 may have distributed power sources. In such a case, the planned demand value may be the difference between the planned output power of the distributed power sources and the planned power demand of the load 310 . Similarly, the actual demand value may be the difference between the actual output power value of the distributed power supply and the actual power demand value of the load 310 .

In the embodiment, the power storage device 240 and the power storage device 340 are illustrated as auxiliary power sources provided in the self-consignment system 100 . However, embodiments are not so limited. Auxiliary power sources may not be provided at power generation facility 200 and demand facility 300 . The auxiliary power source may be a fuel cell device, a biomass power generation device, a geothermal power generation device, a solar cell device, a wind power generation device, or the like.

In embodiments, PCS 220 and PCS 250 are provided separately. However, embodiments are not so limited. PCS 220 and PCS 250 may be configured by one multi-DC link PCS.

Although not specifically mentioned in the embodiment, the power may be instantaneous power (kW) or cumulative power consumption (kWh) for a certain period of time (for example, 30 minutes). For example, the planned value and the actual value may be represented by the integrated power consumption (kWh). Measured and predicted values may be expressed in instantaneous power (kW). However, the measured value and the predicted value may also be represented by an integrated amount of electric power (kWh) by integrating time.

20... Power system 21... Power line 22... Power line 30... Network 100... Self-consignment system 200... Power generation facility 210... Distributed power supply 220... PCS 230... EMS 240... Power storage device 250... PCS, 300 demand facility, 310 load, 320 EMS, 340 power storage device, 350 PCS, 400 facility, 500 power generation side device, 510 communication unit, 520 management unit, 530 control unit, 600 demand Side device 610 Communication unit 620 Management unit 630 Control unit 700 Third party server

Claims (10)

A self-consignment system that performs self-consignment for transmitting electric power output from a power generation facility belonging to a predetermined entity to a demand facility belonging to the predetermined entity via a power system managed by a third party entity. and
a power generation side device that manages the power generation facility;
a demand side device that manages the demand facility;
The demand-side device monitors the calculated value of the procured power so that the calculated value of the procured power assumed as the value of the power to be procured from the power system as the predetermined entity does not exceed a threshold during the target time. having a department,
A self-consignment system, wherein the calculated value of the procured power is a difference between an actual value of demand power supplied from the power system to the demand facility and a planned value of output power output from the power generation facility to the power system. . 2. The self-consignment system according to claim 1, wherein said power generation side device includes a power generation side control unit that executes output power control to bring said actual value of said output power closer to said planned value of said output power. Two or more demand facilities are provided as the demand facilities,
Allocation control is performed to allocate the planned value of the output power to each of the two or more demand facilities so that the calculated value of the procured power does not exceed the threshold value in the target time in each of the two or more demand facilities. Self-consignment system according to claim 1 or claim 2, comprising a controller. Two or more power generation facilities are provided as the power generation facilities,
4. The self-consignment system according to claim 3, wherein in the allocation control, the control unit allocates the planned value of the output power of each of the two or more power generation facilities to each of the two or more demand facilities. 5. The self-consignment according to claim 3, wherein the control unit executes the allocation control based on the planned value of the power demand of each of the two or more demand facilities before the target time. system. 6. The self-consignment system according to any one of claims 3 to 5, wherein said control unit executes said allocation control based on loss occurring in said power system with respect to power transmitted by said self-consignment. 7. The demand-side control unit executes demand power control for controlling the demand power during the target time so that the calculated value of the procured power does not exceed the threshold during the target time. Self-consignment system according to any one of the above. 8. The self-consignment system according to claim 7, wherein, in said demand power control, said demand side control unit controls power consumption of a load provided in said demand facility. 9. The self-consignment system according to claim 7, wherein, in said demand power control, said demand side control unit controls output power of distributed power sources provided in said demand facility. A self-consignment method for performing self-consignment for transmitting electric power output from a power generation facility belonging to a predetermined entity to a demand facility belonging to the predetermined entity via a power system managed by a third party entity. and
The demand-side device that manages the demand facility adjusts the calculated value of the procured power so that the calculated value of the procured power assumed as the value of the power to be procured from the power system as the predetermined entity does not exceed a threshold during the target time. monitoring;
The self-consignment method, wherein the calculated value of the procured power is a difference between an actual value of demand power supplied from the power system to the demand facility and a planned value of output power output from the power generation facility to the power system. .

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