JP2023103489A - Self-consignment system and self-consignment method - Google Patents

Abstract

To provide a self-consignment system and a self-consignment method that enable proper grasping of self-consignment power.SOLUTION: A self-consignment system provides self-consignment for transmitting power output from a power generation facility to a demand facility via a power system managed by a third party entity. 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 power generation side device includes a first transmission unit that transmits a first message including a first power information element related to power output from the power generation facility to the power system for the purpose of self-consignment to the demand-side device.SELECTED DRAWING: Figure 2

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, a technique has been proposed to increase the power output from a power generation facility so that the amount of power per unit time (e.g., 30 minutes) at a demand facility does not exceed a threshold (e.g., Patent Document 1). Alternatively, in a self-consignment system, a technology 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

By the way, in the self-consignment system described above, not all the power demanded by the demand facility is covered by the power output from the power generation facility, and it is assumed that the demand facility receives power from a business operator such as a retail electricity business operator or a power transmission and distribution business operator. In such a case, it is not possible to grasp the amount of electric power (hereinafter referred to as self-consignment electric power) covered by the electric power output from the power generation facility among the electric power demanded by the demand facility.

Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a self-consignment system and a self-consignment method that enable the self-consignment power to be properly grasped.

A self-consignment system according to the first feature performs self-consignment for transmitting electric power output from a power generation facility to a demand facility via a power system managed by a third party entity. 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 power generation device includes a first transmission unit configured to transmit a first message including a first power information element related to power output from the power generation facility to the power system for the purpose of self-consignment to the demand side device.

A self-consignment method according to a second feature is a method of performing self-consignment in which power output from a power generation facility is transmitted to a demand facility from a power generation facility via a power system managed by a third party entity. The self-consignment method comprises a step of transmitting a first message including a first power information element relating to power output from the power generation facility to the power system for the purpose of self-consignment from a power generation device managing the power generation facility to a demand side device managing the demand facility.

ADVANTAGE OF THE INVENTION According to this invention, the self-consignment system and the self-consignment method which can grasp|ascertain self-consignment electric power appropriately can be provided.

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 showing the first message according to the embodiment. FIG. 5 is a diagram illustrating a second message according to the embodiment; FIG. 6 is a diagram showing a self-consignment method according to the embodiment. FIG. 7 is a diagram showing a self-consignment method 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 the first entity. Although not particularly limited, the first entity is an entity that has two or more facilities in geographically separated locations. For example, the first entity is a company having a large-scale production base or a company operating large-scale commercial facilities (for example, a railroad 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 first 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 first 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 the first entity and 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 the 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 the first 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 the first 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 first 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 first 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 first 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 first 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 may check the difference between the planned output value of the power output from the power generation facility 200 (here, synonymous with power transmitted by self-consignment) and the actual output value of the power output from the power generation facility 200. The planned output value and the actual output value are totaled for each unit time (for example, 30 minutes). A penalty may be imposed on the first entity if the difference between the planned power output and the actual power output exceeds an acceptable threshold. An incentive may be provided to the first 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.

Second, the third party server 700 may check the difference between the planned total demand value of power supplied from the power system 20 to the facility group managed by the demand side device 600 and the actual total demand value of power supplied from the power system 20 to the facility group. The total demand plan value and the total demand actual value are totaled 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 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 may check the difference between the total procurement plan value procured from the power system 20 for the facility group managed by the demand side device 600 and the total power procurement actual value procured from the power system 20 for the facility group. 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 dividing 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 the 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 the first entity if the difference between the planned procurement value and the actual procurement value exceeds an acceptable threshold. An incentive may be provided to the first 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 (registered trademark) , 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 OpenADR (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 ECHONETLite, 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 OpenADR or a unique dedicated protocol can be used.

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

(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, or a wired communication module conforming to standards such as IEEE802.3.

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 some timing before the n-1th 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 system 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 . In an embodiment, the communication unit 510 constitutes a first transmission unit that transmits the first message. The first message includes an information element indicating at least one of the planned output value, the measured output value, and the actual output value described above. Details of the first message will be described later (FIG. 4).

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 non-volatile 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 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 a plurality of communicatively coupled circuits (such as integrated circuits and/or discrete circuits).

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. When the expected output value of the electric power output from the power generation facility 200 deviates from the planned output value, the control unit 530 may perform control to bring the expected output value closer to the planned output value. Such controls may include controls that increase or decrease the output power of PCS 220 . 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.).

(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, or a wired communication module conforming to standards such as IEEE802.3.

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.

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 . In embodiments, the communication unit 610 constitutes a second transmission unit that transmits the second message. The second message includes an information element indicating at least one of the above-described demand plan value, demand measurement value and actual demand value. Details of the second message will be described later (FIG. 5).

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, if 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 510 may receive from the facility 400 the operating state of the load provided in the facility 400 . The operating conditions may include the load 310 and the power consumption of the load. The operating state may include information indicating whether the load 310 is operating normally.

The management unit 620 includes a memory such as a non-volatile 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 the operating state of the load 310 or the operating state of the load provided in the facility 400 .

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 a plurality of communicatively coupled circuits (such as integrated circuits and/or discrete circuits).

Control unit 630 controls the elements that make up demand-side device 600 . For example, the control unit 630 instructs the communication unit 510 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 510 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.

The control unit 630 may perform control to bring the total expected demand value closer to the planned total demand value when the estimated total demand value of the power supplied from the power system 20 to the facility group deviates from the planned total demand value. Such controls may include controls that increase or decrease the power consumption of loads provided at facility 400 . 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 expected demand value of the power supplied from the power system 20 to the demand facility 300 deviates from the planned demand value, the control unit 630 may perform control to bring the expected demand value closer to the planned demand value. Such control may include control to increase or decrease the power consumption of load 310 . 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.

(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. 4, the first message includes power generation facility identification information, demand facility identification information, route 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 route information is an information element indicating a power transmission route including the power system between the power generation facility 200 and the demand facility 300 . For example, the route information may include information elements that can identify the distance of the power transmission route including the power system 20 between the power generation facility 200 and the demand facility 300 . The route information may be a flag that identifies a predetermined distance division of the power transmission route. For example, distance divisions may be divisions such as XX km to YY km (flag=“1”) and YY km to ZZ km (flag=“2”). The route information may include an information element capable of identifying a substation included in a power transmission route including power system 20 between power generation facility 200 and demand facility 300 . The route information may be a flag that identifies a predetermined substation type. The type of substation may be classified into a low-voltage substation (flag=“1”), a high-voltage substation (flag=“2”), and a special high-voltage substation (flag=“3”). The route information may be a flag specifying a division of a predetermined number of substations. The division of the number of substations may be division such as PP to QQ (flag=“1”) and QQ to RR (flag=“2”). The route information may include an information element capable of specifying the voltage level of the power line to which the power generation facility 200 is connected. The path information may be a flag that specifies a predetermined voltage height division. For example, voltage levels may be classified into low voltage (flag=“1”), high voltage (flag=“2”), and extra high voltage (flag=“3”).

As described above, the first power information includes information elements that indicate at least one of the planned output value, the measured output value, and the actual output value of the power output from the power generation facility 200 to the power system 20 for the purpose of self-consignment.

Here, the power generation facility identification information, the demand facility identification information, and the route information are information elements for specifying losses in the power system 20 for electric power transmitted from the power generation facility 200 to the demand facility 300 by self-consignment. 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, the first message may contain an information element for identifying loss in power system 20 for power transmitted by self-consignment. Therefore, if the loss can be identified by the demand facility identification information, the first message does not need to include the power generation facility identification information and route information. If the loss can be identified by the power generation facility identification information and the demand facility identification information, the first message does not need to include route information. If the loss can be identified by the route information, the first message may not include the power generation facility identification information and the demand facility identification information.

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. 5, the second message includes demand facility identification information, power generation facility identification information, route information, and second power information.

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

As described above, the second power information includes an information element that indicates at least one of the planned demand value, the measured demand value, and the actual demand value of the power output from the power generation facility 200 to the power system 20 for the purpose of self-consignment.

The second message, like the first message, may include an information element for identifying losses in power system 20 for self-consigned power. However, if the power generation side device 500 does not need it, the transmission of the second message from the demand side device 600 to the power generation side device 500 may be omitted, and the transmission of any information element included in the second message may be omitted.

(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. 6, 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 planned demand value to the demand side device 600 .

In step S<b>15 , the facility 400 transmits the total planned demand value to the demand side device 600 . According to such processing, the demand side device 600 can acquire the total planned total demand value. In step S<b>16 , the demand side device 600 receives the first message from the power generation side device 500 . Here, the first message includes an information element indicating the planned output value as the first power information.

In step S<b>17 , 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 S18, the demand facility 300 displays the planned output value based on the display data. The planned output value (GUI; GraphicalUserInterface) may be in a form that reflects the loss that occurs in the power system 20, or may be in a form that allows the loss that occurs in the power system 20 to be specified.

In step S<b>19 , 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 demand plan value of the demand facility 300 as the second power information. The power generation device 500 may grasp the procurement plan value of the demand facility 300 based on the second message.

In step S20, the demand side device 600 manages the total procurement plan value.

In step S<b>21 , 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>22 , the third party server 700 manages the total procurement plan value received from the 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 facility 200 transmits the actual output value to the power generation side device 500 in step S31.

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 form that reflects the loss that occurs in the power system 20, or may be in a form 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 , facility 400 transmits the total actual demand value to 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.

Thirdly, regarding the self-consignment method according to the embodiment, the flow of notifying the demand side device 600 of the output measurement value will be described.

As shown in FIG. 8, in step S51, the power generation device 500 receives output measurement values from the power generation facility 200 at time intervals shorter than the unit time. The power generation device 500 continues to receive output measurements.

In step S<b>52 , the power generation device 500 transmits the first message to the demand side device 600 . The power generation device 500 may transmit the first message each time it receives an output measurement value from the power generation facility 200 . Alternatively, the power generation device 500 may collect the output measurement values from the power generation facility 200 and then transmit the first message. Here, the first message includes an information element indicating the output measurement value as the first power information.

In step S<b>53 , the demand side device 600 transmits display data for displaying the output measurement value to the demand facility 300 . Here, the display data may be data for displaying the output measurement value reflecting the loss occurring in the power system 20 . The display data may be data for displaying output measurements capable of identifying losses occurring in power system 20 .

In step S54, the demand facility 300 displays the output measurement value based on the display data. The output measurement value (GUI; Graphical User Interface) may be in a form that reflects the loss that occurs in the power system 20, or may be in a form that allows the loss that occurs in the power system 20 to be specified.

Fourthly, with regard to the self-consignment method according to the embodiment, the flow of notifying the power generation side device 500 of the demand measurement value will be described.

As shown in FIG. 9, in step S61, the demand side device 600 receives demand measurement values from the demand facility 300 at time intervals shorter than the unit time. Demand side device 600 continues to receive demand measurements.

In step S<b>62 , the demand side device 600 transmits the second message to the power generation side device 500 . Demand side device 600 may transmit the second message each time it receives a demand measurement from demand facility 300 . Alternatively, the demand-side device 600 may collect output measurement values from the demand facility 300 and then transmit the second message. Here, the second message includes an information element indicating the demand measurement value as the second power information.

In step S<b>63 , the power generation device 500 transmits display data for displaying the demand measurement value to the demand facility 300 . Here, the display data may be data for displaying the demand measurement value reflecting the loss occurring in the power system 20 . The display data may be data for displaying demand measurements capable of identifying losses occurring in power system 20 .

In step S64, the power generation facility 200 displays demand measurements based on the display data. The demand measurement value (GUI; Graphical User Interface) may be in a form that reflects the loss that occurs in the power system 20, or may be in a form that allows the loss that occurs in the power system 20 to be specified.

(Action and effect)
In the embodiment, the demand side device 600 receives from the power generation side device 500 a first message including an information element capable of identifying losses in the power grid 20 for power transmitted from the power generation facility 200 to the demand facility 300 by self-consignment. According to such a configuration, the demand-side device 600 can appropriately grasp the power (self-consignment power) covered by the power output from the power generation facility 200 out of the power demand of the demand facility 300, based on at least one of the planned value, the measured value, and the actual value.

Similarly, the power generation device 500 receives from the demand side device 600 a second message including an information element capable of identifying a 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. According to such a configuration, the power generation side device 500 can appropriately grasp the self-consignment power based on at least one of the planned value, the measured value, and the actual value.

[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 expected 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 expected output value approaches the planned output value. Similarly, when the expected demand value deviates from the planned demand value, the power generation device 500 controls the power storage device 340 (or the PCS 350) so that the expected demand value approaches the planned demand value.

[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 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 case where the demand facility 300 belongs to the same first entity as the power generation facility 200 is exemplified. However, embodiments are not so limited. Demand facility 300 may belong to a second entity that is different from the first 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 demand plan value may be the difference between the plan value of the output power of the distributed power sources and the plan value of the demand power 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 source 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 (4)

A self-consignment system for self-consignment that transmits power output from a power generation facility to a demand facility via a power system managed by a third party entity, comprising:
A power generation side device that manages the power generation facility,
The self-consignment system , wherein the power generation side device includes a transmission unit that transmits an actual output value of power output from the power generation facility to the power system to a third party server managed by a power retailer. A self-consignment system for self-consignment that transmits power output from a power generation facility to a demand facility via a power system managed by a third party entity, comprising:
A power generation side device that manages the power generation facility,
The self-consignment system , wherein the power generation-side device includes a transmission unit that transmits an actual output value of power transmitted by the self-consignment to a third party server managed by a power retailer. A self-consignment method for self-consignment of transmitting power output from a power generation facility to a demand facility via a power system managed by a third party entity, comprising:
A self-consignment method, comprising the step of transmitting , from a power generation-side device that manages the power generation facility, an actual output value of power output from the power generation facility to the power system to a third-party server managed by a power retailer. A self-consignment method for self-consignment of transmitting power output from a power generation facility to a demand facility via a power system managed by a third party entity, comprising:
A self-consignment method, comprising a step of transmitting an actual output value of electric power transmitted by the self-consignment from a power generation side device managing the power generation facility to a third party server managed by an electric power retailer.