Power flow prediction system, power flow prediction program, and power flow prediction method

Abstract

To predict a power flow of a power system without inputting setting information of a system included in the power system.SOLUTION: A power flow prediction system includes: an acquisition unit configured to acquire system facility information indicating a verification target system included in a power system; an extraction unit configured to compare the system facility information acquired by the acquisition unit with actual data of the power system stored in a storage device, and extract the actual data of the power system from the storage device based on a comparison result; and a prediction unit configured to predict a power flow in the power system based on the actual data of the power system extracted by the extraction unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a power flow prediction system, a power flow prediction program, and a power flow prediction method. [Background technology]

[0002] Conventionally, techniques for controlling various devices included in a power system have been known. For example, Patent Document 1 describes an energy management device that appropriately and easily sets control data for various situations. This energy management device includes a remote management device that provides control data for controlling multiple load facilities, and the remote control device extracts setting information similar to load facility information from setting information records stored in an information storage unit, and generates control data. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-82810 Summary of the Invention [Problem to be solved by the invention]

[0004] The energy management device described in Patent Document 1 has a problem in that it is necessary to input setting information for equipment in advance in order to generate control data. Also, there is a conventional technology for calculating the power flow in a power system. When the technology described in Patent Document 1 is used in this power system power flow calculation, there is a problem in that it is not possible to calculate the power flow in the power system unless setting information for various pieces of equipment included in the power system is input.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a power flow prediction system, a power flow prediction program, and a power flow prediction method that can predict the power flow in a power system without inputting setting information for equipment included in the power system. [Means for solving the problem]

[0006] The present disclosure has been made to solve the above-mentioned problems, and one aspect of the present disclosure is a power flow prediction system including an acquisition unit that acquires system equipment information indicating equipment to be verified that is included in a power system, an extraction unit that compares the system equipment information acquired by the acquisition unit with performance data of the power system stored in a storage device and extracts the performance data of the power system from the storage device based on the comparison result, and a prediction unit that predicts the power flow in the power system based on the performance data of the power system extracted by the extraction unit.

[0007] Another aspect of the present disclosure is a power flow prediction method including the steps of: a power flow prediction system acquiring system equipment information indicating equipment to be verified that is included in a power system; the power flow prediction system comparing the acquired system equipment information with performance data of the power system stored in a storage device and extracting the performance data of the power system from the storage device based on the comparison result; and the power flow prediction system predicting a power flow in the power system based on the extracted performance data of the power system.

[0008] Another aspect of the present disclosure is a power flow prediction program that causes a computer to execute the steps of acquiring system equipment information indicating equipment to be verified that is included in a power system, comparing the acquired system equipment information with performance data of the power system stored in a storage device and extracting the performance data of the power system from the storage device based on the comparison result, and predicting the power flow in the power system based on the extracted performance data of the power system. [Effects of the Invention]

[0009] According to one aspect of the present invention, it is possible to predict the power flow in a power system without inputting setting information of facilities included in the power system. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a block diagram showing an example of a power flow prediction system 1 according to a first embodiment. [Figure 2] 1 is a diagram illustrating an example of a power system 300 according to an embodiment. [Figure 3] FIG. 2 is a block diagram showing an example of a storage device 200 according to the embodiment. [Figure 4] FIG. 2 is a diagram illustrating an example of processing performed by the power flow prediction apparatus 100 according to the embodiment. [Figure 5] 3 is a flowchart showing an example of processing by the power flow prediction system 1 in the embodiment. [Figure 6] 10 is a flowchart showing an example of processing by a power flow prediction system 1A in the second embodiment. [Figure 7] 3 is an example of a system diagram for explaining calculations by a calculation unit 120 according to the embodiment. [Figure 8] 10 is a flowchart showing an example of processing by a power flow prediction system 1A in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] A power flow prediction system, a power flow prediction program, and a power flow prediction method to which the present invention is applied will be described below with reference to the drawings.

[0012] FIG. 1 is a block diagram showing an example of a power flow prediction system 1 according to the first embodiment. The power flow prediction system 1 includes, for example, a power flow prediction device 100, a storage device 200, a power system 300, an environmental information providing device 400, and a user terminal device 500. The power flow prediction device 100, the storage device 200, the power system 300, the environmental information providing device 400, and the user terminal device 500 are connected to each other so that they can communicate with each other via, for example, a communication network. The communication network NW may include, for example, a general-purpose network such as the Internet, and a private network such as local 5G or WiFi (registered trademark). The power flow prediction device 100, the storage device 200, the power system 300, the environmental information providing device 400, and the user terminal device 500 each include a communication interface (not shown) such as a network interface card (NIC) or a wireless communication module for connecting to the communication network NW such as the Internet.

[0013] The power flow prediction device 100 is an information processing device that transmits and receives information to and from other devices and executes various processes. The storage device 200 includes an information storage medium that stores various data and an information processing device that creates a database. The power system 300 includes various facilities such as power generation facilities, power transmission and distribution facilities, and consumer facilities. The environmental information providing device 400 is a server device that transmits environmental information about the power system 300 in response to a request. The user terminal device 500 is an information processing device operated by a user who views information related to the power flow in the power system 300.

[0014] The power flow prediction device 100 includes, for example, a reception unit 102, an acquisition unit 104, an extraction unit 106, a prediction unit 108, and an output unit 110. The reception unit 102, the acquisition unit 104, the extraction unit 106, the prediction unit 108, and the output unit 110 are realized by a processor (computer) such as a CPU (Central Processing Unit) executing a power flow prediction program stored in a program memory.

[0015] The receiving unit 102 receives requests and the like from the user terminal device 500. The request is, for example, a request to predict the power flow in the power system 300, including information indicating extraction conditions for performance data of the power system 300. The acquiring unit 104 acquires power system equipment information. The power system equipment information is information indicating the equipment to be verified. The performance data to be verified is, for example, equipment in the power system 300 that the user wishes to change, replace, add, etc. The extracting unit 106 compares the power system equipment information acquired by the acquiring unit 104 with performance data of the power system 300 stored in the storage device 200, and extracts the performance data of the power system 300 from the storage device 200 based on the comparison result. The predicting unit 108 predicts the power flow in the power system 300 based on the performance data of the power system 300 extracted by the extracting unit 106. The output unit 110 outputs information indicating the power flow prediction result by the predicting unit 108 to the user terminal device 500. The acquisition unit 104 acquires information indicating a portion of the equipment in the power system 300 as the equipment to be verified, and the prediction unit 108 predicts the overall power flow of the power system 300 including the equipment to be verified.

[0016] The performance data of the power system 300 is information that records the performance of the power flow in the power system 300 in the past. The performance data of the power system 300 includes information previously acquired from each piece of equipment in the power system 300, such as time, the equipment included in the power system 300, the connection relationships between the equipment, the state of each piece of equipment, the active power (P), reactive power (Q), and direction of power flow of each part in the power system 300. The state of each piece of equipment is, for example, information indicating the conduction or release of a switch, and information on malfunctions such as failures. The connection state between pieces of equipment is information indicating the conduction or release between pieces of equipment.

[0017] The acquiring unit 104 may acquire environmental information. The environmental information is information indicating the environment in which the verification target facility is installed. The environmental information is, for example, information that affects the power flow in the power system 300, such as weather and temperature. The amount of power generated, the amount of demand, and the amount of power generated from renewable energy change depending on the weather and temperature, and the power flow in the power system 300 changes. The environmental information may also be information that is a factor that changes the power flow, such as the season or the day of the week. The extracting unit 106 compares the system equipment information and the environmental information with the environmental information included in the performance data of the power system 300 stored in the storage device 200, and extracts the configuration data of the power system from the storage device 200 based on the comparison result.

[0018] FIG. 2 is a diagram illustrating an example of a power system 300 according to the embodiment. The power system 300 includes, for example, a power plant facility 310, a power transmission and distribution network 320, a consumer facility 330, and a renewable energy facility 340. The verification target facility 322 includes, for example, a switch connected between the mother vessels in the power transmission and distribution network 320. Conditions other than the configuration of the verification target facility 322, such as the open / closed state of the switch and environmental information, may be set for the verification target facility 322 based on, for example, a user's operation of the user terminal device 500. Note that the verification target facility 322 may be any facility included in the power system 300, such as a distribution tower and a distribution pole (utility pole), an IED (Intelligent Electronic Device), a transformer, a switch, or a distribution line.

[0019] The receiving unit 102 may receive change information indicating equipment to be changed in the power grid 300 based on a user operation from the user terminal device 500. The acquiring unit 104 acquires information indicating the power grid equipment information 322 based on the change information.

[0020] FIG. 3 is a block diagram showing an example of the storage device 200 according to the embodiment. The storage device 200 includes, for example, a data acquisition unit 202 and a data storage unit 204. The data acquisition unit 202 acquires equipment configuration information, equipment status information, and power information from various types of equipment in the power system 300 via a communication network. The equipment configuration information is, for example, information indicating the location of the equipment, the type of equipment, and the connection relationships between the equipment. The equipment status information is, for example, information indicating the operating status of the equipment, such as the open / close state of a switch. The power information is, for example, information indicating the active power (P), reactive power (Q), power flow direction, current, and voltage transmitted by a switch or a transmission line. The data acquisition unit 202 also acquires environmental information, such as weather information and temperature information, from the environmental information providing device 400. The data acquisition unit 202 may acquire environmental information from sensors around the equipment in the power system 300. The data storage unit 204 stores, for example, for each time period, performance data of the power system 300, including the equipment configuration information, equipment status information, and power information, in association with the environmental information.

[0021] The storage device 200 may store performance data of the power system 300 based on planned change information indicating planned changes to the power system 300. The data acquisition unit 202, for example, references invoice information including construction plans for the power system 300, and acquires performance data and environmental information of the power system 300 during the time period when the construction is scheduled. This allows the storage device 200 to accumulate performance data and environmental information of the power system 300 when construction work on the power system 300 is being carried out.

[0022] The storage device 200 may store performance data and environmental information of the power system 300 when a power outage occurs due to, for example, a lightning strike. As a result, when the storage device 200 detects an event that may affect the power flow of the power system 300, it can output a request to the power system 300 and the environmental information providing device 400 and collect performance data and environmental information of the power system 300. An example of an event that may affect the power flow of the power system 300 is a gathering that temporarily increases power consumption. Furthermore, the storage device 200 may store performance data and environmental information of the power system 300 at a timing determined appropriate by the user or at any timing.

[0023] FIG. 4 is a diagram illustrating an example of the processing of the power flow prediction apparatus 100 according to the embodiment. The data storage unit 204 stores, as performance data for the power system 300, equipment configuration information, equipment status information, and power information for the verification target equipment 322, in association with environmental information. The receiving unit 102 receives equipment configuration information and environmental information from the user terminal device 500 as extraction conditions for performance data of the power system 300. As a result, the acquiring unit 104 acquires the equipment configuration information and environmental information indicating the verification target equipment 322. The extracting unit 106 compares the equipment configuration information and environmental information indicating the verification target equipment 322 with the equipment configuration information and environmental information in the performance data. If there is performance data that matches the equipment configuration information and environmental information indicating the verification target equipment 322, the extracting unit 106 extracts the performance data from the data storage unit 204. The predicting unit 108 acquires the overall performance data of the power system 300, including the performance data that matches the equipment configuration information and environmental information indicating the verification target equipment 322 extracted by the extracting unit 106. The prediction unit 108 creates information indicating the active power (P), reactive power (Q), power flow direction, current, and voltage contained in the acquired overall performance data of the power system 300 including the verification target facility 322 as a prediction result of the overall power flow of the power system 300 including the verification target facility 322. The output unit 110 outputs the power flow prediction result created by the prediction unit 108 to the user terminal device 500.

[0024] FIG. 5 is a flowchart showing an example of the processing of the power flow prediction system 1 in the embodiment. The storage device 200 acquires information from the power system 300 and the environmental information providing device 400, and accumulates performance data of the power system 300 (step S100). The user terminal device 500 transmits extraction conditions for the verification target facility 322 to the power flow prediction device 100 based on a user operation, and the receiving unit 102 acquires the extraction conditions for the verification target facility 322 (step S102). The acquiring unit 104 acquires system facility information and environmental information indicating the verification target facility 322 of the power system 300 from the storage device 200 based on the extraction conditions for the verification target facility 322 acquired by the receiving unit 102 (step S104).

[0025] The extraction unit 106 compares the system equipment information and environmental information indicating the verification target facility 322 acquired by the acquisition unit 104 with the performance data of the power system 300 stored in the storage device 200 (step S108). The extraction unit 106 determines whether there is performance data of the power system 300 that matches the system equipment information and environmental information indicating the verification target facility 322 (step S110).

[0026] If there is performance data for the power system 300 that matches the system facility information and environmental information indicating the verification target facility 322 (step S110: YES), the extraction unit 106 extracts the performance data for the matching power system 300 from the storage device 200 (step S112). The prediction unit 108 creates a prediction result indicating the overall power flow of the power system 300 including the verification target facility 322 based on the performance data for the matching power system 300, and the output unit 110 outputs the power flow prediction result to the user terminal device 500 (step S114).

[0027] If there is no performance data of the power system 300 that matches the system equipment information and environmental information indicating the verification target facility 322 (step S110: NO), the extraction unit 106 extracts performance data of the power system 300 that is closest to the system equipment information and environmental information indicating the verification target facility 322 (step S116). The prediction unit 108 creates a prediction result that indicates the overall power flow of the power system 300 including the verification target facility 322 based on the extracted performance data of the power system 300, and the output unit 110 outputs the power flow prediction result to the user terminal device 500 (step S114).

[0028] As described above, the power flow prediction system 1 of the first embodiment can obtain system facility information indicating the verification target facility 322, extract the performance data of the power system 300 from the storage device 200 based on the comparison result between the system facility information and the performance data of the power system 300 stored in the storage device 200, and predict the power flow of the power system 300 including the verification target facility 322. As a result, the power flow prediction system 1 can predict the power flow of the power system 300 without having to input setting information for the facilities included in the power system 300, as is the case with existing power flow calculations.

[0029] The receiving unit 102 may receive allowable error information indicating the allowable error between the system equipment information and the performance data of the power system stored in the storage device 200 (for example, step S102). The allowable error is, for example, the error between the temperature in the environmental information received from the user terminal device 500 and the temperature in the performance data. The allowable error may be information indicating the configuration of the power system 300 that allows for an error among the configurations of the verification target facility 322. The extracting unit 106 extracts the performance data of the power system 300 within the allowable error range indicated by the allowable error information. This allows the power flow prediction device 100 to output a power flow prediction result even if there is no performance data of the power system 300 that matches the verification target facility 322.

[0030] Furthermore, the power flow prediction device 100 may include an output unit 110 that outputs difference information indicating the difference between the configuration of the power system 300 corresponding to the performance data of the power system 300 extracted by the extraction unit 106 and the current configuration of the power system 300 (for example, steps S114 and S116). This allows the power flow prediction device 100 to make the user aware of the difference between the configuration of the power system 300 used in the power flow prediction results and the current configuration of the power system 300.

[0031] The second embodiment will be described below, in which the same parts as those in the first embodiment are denoted by the same reference numerals. FIG. 6 is a block diagram showing an example of a power flow prediction system 1A according to the second embodiment. The power flow prediction device 100A in the second embodiment includes a calculation unit 120. The calculation unit 120 performs power flow calculations for the power system 300 based on the system facility information acquired by the acquisition unit 104. The calculation unit 120 receives information such as the active power, reactive power, voltage, and current of the verification target facility 322 from, for example, the user terminal device 500. The calculation unit 120 calculates information such as the active power, reactive power, voltage, and current of the facilities in the power system 300 connected to the verification target facility 322 based on the received information. The output unit 110 outputs the prediction result of the power flow in the power system 300 predicted by the prediction unit 108 and the power flow calculation result of the power flow in the power system 300 calculated by the calculation unit 120.

[0032] FIG. 7 is an example of a system diagram for explaining the calculation of the calculation unit 120 in the embodiment. For example, the calculation unit 120 adds a switch (1) to the power system 300 as the verification target facility 322, and receives the active power P1 and reactive power Q1 when the switch (1) is added. The calculation unit 120 calculates the state of each part in the power system 300, such as the active power P2 and reactive power Q3 in the switch (2) connected to the switch (1), and the active power P3 and reactive power Q3 in the distribution transformer. As a result, the calculation unit 120 creates a power flow calculation result for the power flow.

[0033] FIG. 8 is a flowchart showing an example of the processing of the power flow prediction system 1A in the second embodiment. The storage device 200 acquires information from the power system 300 and the environmental information providing device 400, and accumulates performance data of the power system 300 (step S100). The user terminal device 500 transmits extraction conditions for the verification target facility 322 to the power flow prediction device 100 based on a user operation, and the receiving unit 102 acquires the extraction conditions for the verification target facility 322 (step S102). The acquiring unit 104 acquires system facility information and environmental information indicating the verification target facility 322 of the power system 300 from the storage device 200 based on the extraction conditions for the verification target facility 322 acquired by the receiving unit 102 (step S104).

[0034] The extraction unit 106 compares the system equipment information and environmental information indicating the verification target facility 322 acquired by the acquisition unit 104 with the performance data of the power system 300 stored in the storage device 200 (step S108). The extraction unit 106 determines whether there is performance data of the power system 300 that matches the system equipment information and environmental information indicating the verification target facility 322 (step S110).

[0035] If there is performance data for the power system 300 that matches the system facility information and environmental information indicating the facility to be verified (step S110: YES), the extraction unit 106 extracts the performance data for the matching power system 300 from the storage device 200 (step S112). The prediction unit 108 creates a prediction result indicating the overall power flow in the power system 300 including the facility to be verified based on the performance data for the matching power system 300, and the output unit 110 outputs the power flow prediction result to the user terminal device 500 (step S114).

[0036] If there is no performance data of the power system 300 that matches the system equipment information and environmental information indicating the verification target facility 322 (step S110: NO), the extraction unit 106 extracts performance data of the power system 300 that most closely matches the system equipment information and environmental information indicating the verification target facility 322 (step S116). The calculation unit 120 calculates the overall power flow of the power system 300 including the verification target facility 322 (step S200). The calculation unit 120, for example, obtains the latest performance data of the power system 300 from the storage device 200 and calculates the overall power flow of the power system 300 when the verification target facility 322 is introduced into the latest power system 300. The prediction unit 108 creates a prediction result indicating the overall power flow of the power system 300 including the verification target facility 322 based on the extracted performance data of the power system 300, and the output unit 110 outputs the power flow calculation result and the power flow prediction result to the user terminal device 500 (step S202).

[0037] If there is no performance data for the power system 300 that matches the system equipment information and environmental information indicating the equipment 322 to be verified (step S110: NO), information indicating that "there is no performance data for the power system 300 that matches the system equipment information and environmental information indicating the equipment 322 to be verified" may be output to the user terminal device 500 and displayed on the screen.

[0038] As described above, according to the second embodiment of the power flow prediction system 1A, if there is no actual data for the power system 300 that matches the system equipment information and environmental information indicating the verification target equipment 322, the power flow calculation results can be output to the user terminal device 500 in addition to the power flow prediction results.

[0039] Although each embodiment and variant has been described, these are merely examples and are not intended to be limiting. For example, one aspect of the present invention may be realized by combining any of the embodiments or variants, or a part of each embodiment or a part of each variant, with one or more other embodiments or one or more other variants. [Explanation of symbols]

[0040] 1, 1A... power flow prediction system, 100, 100A... power flow prediction device, 102... reception unit, 104... acquisition unit, 106... extraction unit, 108... prediction unit, 110... output unit, 120... calculation unit, 200... storage device, 202... data acquisition unit, 204... data storage unit, 300... power system, 320... transmission and distribution network, 322... system equipment information, 400... environmental information providing device, 500... user terminal device

Claims

1. an acquisition unit that acquires system equipment information indicating verification target equipment included in the power system; an extracting unit that compares the power system equipment information acquired by the acquiring unit with performance data of the power system stored in a storage device, and extracts the performance data of the power system from the storage device based on a comparison result; a prediction unit that predicts a power flow in the power system based on the performance data of the power system extracted by the extraction unit; A power flow prediction system comprising:

2. The acquisition unit acquires environmental information indicating an environment in which the verification target equipment is installed, the extraction unit compares the power system equipment information and the environmental information with environmental information included in performance data of the power system stored in the storage device, and extracts configuration data of the power system from the storage device based on a comparison result; The power flow forecasting system according to claim 1 .

3. a reception unit that receives change information indicating a facility to be changed in the power system based on a user operation, The acquisition unit acquires the system equipment information based on the change information. The power flow forecasting system according to claim 1 .

4. the receiving unit receives allowable error information indicating an allowable error between the grid equipment information and actual data of the power grid stored in a storage device; The extraction unit extracts actual data of the power system for the power system equipment information within a range of allowable error indicated by the allowable error information. The power flow forecasting system according to claim 3 .

5. 2. The power flow prediction system according to claim 1, further comprising an output unit that outputs difference information indicating a difference between a configuration of the power system corresponding to the actual data of the power system extracted by the extraction unit and a current configuration of the power system.

6. a calculation unit that performs a power flow calculation of the power system based on the system equipment information acquired by the acquisition unit; an output unit that outputs a prediction result of the power flow in the power system predicted by the prediction unit and a power flow calculation result of the power flow in the power system calculated by the calculation unit; The power flow forecasting system of claim 1 , comprising:

7. 2. The power flow prediction system according to claim 1, wherein the storage device stores the performance data of the power system based on change schedule information indicating a schedule of changes to the power system.

8. a step in which the power flow prediction system acquires system equipment information indicating a verification target equipment included in the power system; the power flow prediction system comparing the acquired power system equipment information with actual data of the power system stored in a storage device, and extracting the actual data of the power system from the storage device based on a comparison result; a step of predicting a power flow in the power system based on the extracted performance data of the power system by the power flow prediction system; A power flow forecasting method.

9. On the computer, acquiring system equipment information indicating a verification target facility included in the power system; a step of comparing the acquired power system equipment information with performance data of the power system stored in a storage device, and extracting the performance data of the power system from the storage device based on a comparison result; predicting a power flow in the power system based on the extracted performance data of the power system; Run the power flow prediction program.

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