Equipment installation support device and equipment installation support method

Abstract

To provide an equipment installation support device that can more appropriately arrange distributed power sources in order to stabilize a power system.SOLUTION: An equipment planning unit 13 proposes an installation location for installing a distributed power source by using risk evaluation information that evaluates the deviation point and the degree of deviation from a system constraint in a power system, a consumer constraint condition 24 indicating the installation constraint regarding the installation of the distributed power source in an area where power is supplied from the power system, and distributed power source information 25 that indicates the specification of the distributed power source.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an equipment introduction support device and an equipment introduction support method. [Background technology]

[0002] In recent years, power generation devices that utilize natural energy, such as solar power generation devices and wind power generation devices, have been attracting attention. Since it is not easy to maintain a constant power output with these types of power generation devices, supplying power from the power generation devices to a power grid can cause the grid to become unstable. For example, in a power distribution system close to a power consumer, a sudden change in weather can cause a change in the output of a solar power generation device or reverse power flow, which can destabilize the power distribution system. Furthermore, as solar power generation devices become more widespread, it is considered important to take measures to prevent power flow from exceeding the operating capacity of the power lines.

[0003] However, in order to stabilize the power distribution system, installing devices such as step voltage regulators (SVRs) and static var compensators (SVCs), introducing control devices to control the output of solar power generation equipment, and strengthening the power distribution system poses the problem of increasing the capital investment burden on power transmission and distribution companies.

[0004] One effective way to stabilize the power distribution system while reducing the burden of capital investment is to appropriately deploy distributed power sources such as storage batteries near consumers.

[0005] In response to this, Patent Document 1 discloses a technology for determining the effective location of storage batteries to stabilize the power grid. In this technology, the location of storage batteries is determined based on information related to power demand, such as power demand by consumers or its fluctuations. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-63720 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the technology described in Patent Document 1 simply determines the location of the storage battery based on information regarding power demand, and does not take into account constraints on the location of the storage battery, so there is a risk that the storage battery may not be placed in an appropriate location.

[0008] An object of the present invention is to provide an equipment introduction support device and an equipment introduction support method that enable more appropriate placement of distributed power sources in order to stabilize the power system. [Means for solving the problem]

[0009] An equipment introduction support device according to one aspect of the present disclosure is an equipment introduction support device that supports the introduction of distributed power sources to be connected to a power grid, and has an equipment planning unit that proposes installation locations for the distributed power sources using risk assessment information that evaluates the locations and degrees of deviations from system constraints for the power grid, constraint condition information that indicates installation constraints for installing the distributed power sources in areas where power is supplied from the power grid, and distributed power source information that indicates the specifications of the distributed power sources. [Effects of the Invention]

[0010] According to the present invention, it is possible to more appropriately allocate distributed power sources in order to stabilize the power system. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a configuration example of an equipment introduction support device according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a diagram illustrating an example of customer vicinity information according to the first embodiment of the present disclosure. [Figure 3]FIG. 2 is a diagram illustrating a configuration example of a systematic risk estimation unit according to the first embodiment of the present disclosure. [Figure 4] FIG. 10 is a diagram illustrating an example of an evaluation result of a deviation evaluation unit. [Figure 5] FIG. 10 is a diagram showing another example of the evaluation result of the deviation evaluation unit. [Figure 6] 10 is a flowchart illustrating an example of an operation of a facility planning unit according to the first embodiment of the present disclosure. [Figure 7] FIG. 10 is a diagram illustrating an example of a process related to the establishment of a facility plan. [Figure 8] FIG. 10 is a diagram illustrating an example of a process related to the establishment of a facility plan. [Figure 9] FIG. 2 is a sequence diagram illustrating an example of an operation of the equipment introduction support system. [Figure 10] FIG. 10 is a diagram illustrating a configuration example of an equipment introduction support device according to a second embodiment of the present disclosure. [Figure 11] FIG. 10 is a diagram illustrating an example of customer vicinity information according to a second embodiment of the present disclosure. [Figure 12] 10 is a flowchart illustrating an example of an operation of an equipment planning unit according to a second embodiment of the present disclosure. [Figure 13] FIG. 10 is a diagram illustrating a configuration example of an equipment introduction support device according to a third embodiment of the present disclosure. [Figure 14] FIG. 10 is a diagram illustrating a configuration example of a systematic risk estimation unit according to a third embodiment of the present disclosure. [Figure 15] 11 is a flowchart illustrating an example of an operation of a facility plan formulation unit according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the following embodiments are merely examples and are not intended to limit the invention itself. [Example]

[0013] FIG. 1 is a diagram illustrating a configuration example of an equipment introduction support device according to a first embodiment of the present disclosure. The equipment introduction support device 1 illustrated in FIG. 1 is connected to an electricity transmission and distribution company device 101 managed by an electricity transmission and distribution company, a consumer device 102 managed by a consumer, and a distributed power source provider device 103 managed by a distributed power source provider. The equipment introduction support device 1 also includes an information storage unit 11, a system risk estimation unit 12, and an equipment plan formulation unit 13. The distributed power source may be, for example, a power generation device using renewable energy such as a solar power generation device, or a storage battery.

[0014] The equipment introduction support device 1 can be realized by an information processing device capable of various information processing, such as a computer device. The information processing device has, for example, a processor, a storage medium, and a communication interface, and further has an input unit such as a mouse and keyboard, and a display unit such as a monitor, as necessary.

[0015] The processor may be, for example, a CPU (Central Processing Unit) or an FPGA (Field-Programmable Gate Array). The storage medium may be, for example, a magnetic storage medium such as an HDD (Hard Disk Drive), or a semiconductor storage medium such as a RAM (Random Access Memory), a ROM (Read Only Memory), or an SSD (Solid State Drive). Alternatively, a combination of an optical disk such as a DVD (Digital Versatile Disk) and an optical disk drive may be used as the storage medium. Furthermore, other high-value storage media such as magnetic tape media may also be used as the storage medium.

[0016] The storage medium stores a computer program. A processor reads the computer program from the storage medium and executes it to realize each function of the equipment introduction support device 1. In addition to the program, the storage medium also stores various information necessary for the processing of the equipment introduction support device 1.

[0017] The information storage unit 11 stores various types of information. For example, the information storage unit 11 stores grid information 21, grid reinforcement request information 22, consumer surroundings information 23, consumer constraint conditions 24, and distributed power source information 25.

[0018] The system information 21 and the system reinforcement request information 22 are transmitted from the power transmission and distribution company device 101. The system information 21 is information about the power system, and indicates the configuration of the power system (existing system equipment, distributed power sources, loads, constraints, etc.). The system reinforcement request information 22 indicates, as reinforcement request points, points in the power system (specifically, the power system indicated in the system information 21) that may deviate from system constraints. The system constraints are restrictions on the power system, and indicate, for example, the allowable ranges of voltage and current at each point in the power system. The system reinforcement request information 22 is calculated from the system information 21 by the power transmission and distribution company device 101, for example.

[0019] The consumer surroundings information 23 and the consumer constraint conditions 24 are transmitted from the consumer device 102. The consumer surroundings information 23 is information about a supply area, which is an area to which power is supplied from the power system, and more specifically, information about the surroundings of a consumer to which power is supplied from the power system (see FIG. 2). Note that the surroundings of a consumer are considered to be included in the supply area.

[0020] The consumer constraints 24 are constraint information indicating installation constraints on the installation of distributed power sources in the supply area. In this embodiment, the installation constraints indicate consumer constraints on the installation of distributed power sources at each consumer. Consumer constraints are constraints imposed on the installation of distributed power sources, such as the space required to place the distributed power sources and the contracted power (voltage, current, etc.).

[0021] The distributed power source information 25 is transmitted from the distributed power source provider device 103. The distributed power source information 25 is information about the distributed power sources that can be provided by the distributed power source provider, and more specifically, indicates the specifications of each type of distributed power source that can be provided by the distributed power source provider.

[0022] The system risk estimation unit 12 generates risk assessment information, which is an evaluation result obtained by evaluating (estimating) the locations and degrees of deviations from system constraints in the power system, based on various information stored in the information storage unit 11 (more specifically, system information 21, system reinforcement request information 22, and consumer surroundings information 23), and outputs the risk assessment information to the equipment plan formulation unit 13. The degree of deviation is, for example, at least 1 of the frequency, time, and amount at which a target value corresponding to the power flow in the power system deviates from a predetermined allowable range. The target value is, for example, power, voltage, and current, or the ratio of these to a reference value.

[0023] The equipment plan formulation unit 13 formulates an equipment plan for the installation of distributed power sources to be introduced into the power system, using the various information stored in the information storage unit 11 and the risk assessment information from the system risk estimation unit 12, and proposes the plan to the power transmission and distribution company, consumers, and distributed power source providers. The equipment plan includes, for example, the installation locations where the distributed power sources will be installed, the types of distributed power sources to be installed, and the connection positions where the distributed power sources will be connected in the power system.

[0024] 2 is a diagram showing an example of the consumer surroundings information 23. The consumer surroundings information 23 shown in FIG.

[0025] Vacant land information 231 is information about vacant land (vacant lots) around the consumer, and indicates, for example, the location and area of ​​the vacant land. Building information 232 is information about buildings (structures) around the consumer, and indicates, for example, the value of the building itself, the value of the land on which the building is built, the spatial value of the building (the value above the building), and the existence of rights such as solar radiation rights. Site area information 233 indicates the area of ​​the sites of other consumers around the consumer. Weather information is information about weather, and indicates the amount of solar radiation (for example, the average amount of solar radiation over a year). Note that the weather information may be actual values ​​measured in the past, or may be future predicted values ​​predicted from actual values, etc. Consumer surroundings information 23 may also include disaster risk assessment information that evaluates the risk of disasters around the consumer.

[0026] 3 is a diagram showing an example of the configuration of the power system risk estimation unit 12. The power system risk estimation unit 12 includes a distributed power source introduction amount estimation unit 121 and a power system deviation evaluation unit 122.

[0027] The distributed power source introduction amount estimation unit 121 estimates the amount of power generated by a renewable energy power generation device, which is a type of distributed power source, as a newly installed power generation amount when the renewable energy power generation device is installed as a new facility near the consumer, based on the consumer surroundings information 23.

[0028] The grid deviation evaluation unit 122 generates risk assessment information that evaluates the deviation points and degrees of deviation from grid constraints in the power grid based on the newly introduced power generation amount estimated by the distributed power source introduction amount estimation unit 121, grid information 21, and grid reinforcement request information 22.

[0029] Specifically, the system deviation evaluation unit 122 includes a system analysis unit 123 and a deviation evaluation unit 124 .

[0030] The system analysis unit 123 performs system analysis such as power flow calculation for the power system based on the newly introduced power generation amount, system information 21, and system reinforcement request information 22, thereby analyzing the state of the power system when the newly introduced power generation amount is supplied to the system reinforcement location indicated in the system reinforcement request information 22.

[0031] The deviation evaluation unit 124 generates risk evaluation information that evaluates the deviation points and degrees of deviation from the system constraints of the power system based on the analysis results of the system analysis unit 123 and the system information 21.

[0032] Fig. 4 is a diagram showing an example of risk assessment information that is the assessment result of the deviation assessment unit 124. In Fig. 4, graphs 41 to 44 are shown as the assessment results.

[0033] Graph 41 shows the line current distribution, which indicates the ratio of the maximum current to the reference current at the deviation point for each time period. If the ratio exceeds 1, it indicates that a deviation from the grid constraint has occurred. In addition, power deviation amount 411, which is the total value of the deviation amounts for each time period obtained by converting the current values ​​for which the ratio is 1 or more into power, serves as a guide to the charge capacity of the storage battery required to suppress deviation from the grid constraint. In addition, the deviation amount for each time period serves as a guide to the rated output required for the storage battery. Note that although the reference current is the rated current in the figure, it may vary for each time period. In addition, power deviation amount 411 may be calculated from the measurement value of the consumer's smart meter, etc.

[0034] Graph 42 shows the distribution of surplus line power, which evaluates the relationship between the amount of power deviation and the congestion frequency, which is the number of times that power deviation occurred, in the state (current state) before the addition of new equipment (renewable energy power generation equipment) and the state (after installation) after the addition of the new equipment. Graph 42 summarizes the line current distribution shown in Graph 41. Graph 42 can be used to identify the amount of power deviation that can be reduced by introducing distributed power sources, and to narrow down the candidates for distributed power sources necessary to reduce the amount of power deviation.

[0035] Graph 43 shows the voltage value at each time of a specific bus included in the electrode system. Dashed line 431 of graph 43 shows the upper voltage limit value based on the system constraints, and dashed line 432 shows the lower voltage limit value based on the system constraints.

[0036] Graph 44 shows the line surplus voltage distribution, which shows the relationship between the deviation voltage value at present and after installation and the voltage deviation frequency, which is the number of times that deviation from that deviation voltage value has occurred. The deviation voltage value is the difference between the upper voltage limit when the voltage value exceeds the upper voltage limit, and is the difference between the voltage value and the lower voltage limit when the voltage value falls below the lower voltage limit. Graph 44 can be used to identify deviation voltage values ​​that can be reduced by installing distributed power sources, and to narrow down the candidate distributed power sources needed to reduce power voltage values.

[0037] FIG. 5 is a diagram showing another example of the evaluation result of the deviation evaluation unit 124 of the systematic risk estimation unit 12. In FIG.

[0038] FIG. 5 shows a system model 51 as a power system. The system model 51 is a power system from a transformer 515 to the terminal bus with bus number "11", and is connected to PV 511, LNG 512, DG 513, and Load 514. PV 511 is a distributed power source (photovoltaic power generation device) to be introduced as a new facility. LNG 512 is an existing gas generator. DG 513 is an existing diesel generator. Load 514 is an existing load.

[0039] The installation location and installation capacity (maximum power generation amount) of the PV 511 are estimated by the system risk estimation unit 12 based on the consumer surrounding information 23 corresponding to the bus with bus number "10". The impact of the introduction of the PV 511 is used to evaluate the location and degree of deviation from the system constraints in the power system.

[0040] Graph 52 is a graph evaluating the current congestion frequency at each bus evaluated by system risk estimation unit 12 and the congestion frequency when PV 511 is introduced. Graph 53 is a graph evaluating the current voltage deviation frequency at each bus evaluated by system risk estimation unit 12 and the voltage deviation frequency when PV 511 is introduced. Note that the bus numbers in graphs 52 and 53 correspond to the bus numbers in system model 51.

[0041] In the example of Figure 5, it is expected that the introduction of PV511 will increase reverse power flow, increase the frequency of system congestion at busbars with bus numbers 7 to 10, and increase the frequency of system voltage deviations from system constraints at busbars with bus numbers 7 to 11.

[0042] Furthermore, if the line capacity of buses numbered 6 to 10 is lower than the total rated output of LNG512 and PV511 and is also lower than the power consumption of Load514 during peak power hours, during peak power hours, the power generation output of LNG512 or PV511 will be reduced, and DG513, which has a higher generation cost, will be used to reduce the power generation output of LNG512 or PV511 to make up for the difference, and depending on the situation, power will be supplied from the even more expensive contracted power.

[0043] FIG. 6 is a flowchart illustrating an example of the operation of the facility planning unit 13.

[0044] First, the equipment planning unit 13 acquires risk assessment information from the power system risk estimation unit 12 (step S101). If necessary, the power system risk estimation unit 12 outputs, together with the risk assessment information, power system information 21, power system reinforcement request information 22, and consumer surroundings information 23 used to generate the risk assessment information, and the equipment planning unit 13 also acquires these pieces of information 21 to 23. Here, the power system risk estimation unit 12 acquires the information 21 to 23.

[0045] The facility planning unit 13 acquires the consumer constraint conditions 24 and the distributed power source information 25 from the information storage unit 11 (step S102).

[0046] The facility plan formulation unit 13 sets an introduction purpose for newly introducing a distributed power source (step S103). The introduction purpose may be, for example, maximizing the environmental value of a consumer by introducing a distributed power source, minimizing the system reinforcement costs involved in the reinforcement of the power system by the power transmission and distribution company, and maximizing the profit of a consumer by introducing a distributed power source. There may be multiple introduction purposes. The facility plan formulation unit 13 sets the introduction purpose, for example, according to instructions from a user who uses the facility introduction support device 1.

[0047] The facility plan formulation unit 13 formulates a facility plan based on the introduction purpose, the information 21 to 25, and the risk assessment information (step S104).

[0048] The equipment plan formulation unit 13 performs a system analysis of the power system that reflects the equipment plan (the power system including the distributed power sources installed in accordance with the equipment plan) to evaluate the introduction effect, which is the effect on the introduction purpose based on the equipment plan (step S105).

[0049] The facility planning unit 13 determines whether the introduction effect is appropriate for the introduction purpose and constraints (step S106).

[0050] If the introduction effect is not appropriate (step S106: NO), the equipment plan formulation unit 13 reflects the result and returns to the processing of step S104. At this time, the equipment plan formulation unit 13 changes, for example, the initial values ​​and parameters of the multi-objective optimization method described later.

[0051] On the other hand, if the introduction effect is appropriate (step S106: YES), the equipment plan formulation unit 13 transmits equipment plan information indicating the equipment plan to the power transmission and distribution company device 101, the consumer device 102, and the distributed power source provider device 103 (step S107), and terminates the processing.

[0052] In steps S104 to S106, the process of formulating the facility plan uses, for example, a multi-objective optimization method that simultaneously calculates solutions to multiple objective functions according to the implementation objectives. The objective functions, for example, indicate minimizing the total sum of the implementation costs and operation costs of consumers' distributed power sources and minimizing the grid expansion costs of the power transmission and distribution company. The allowable voltage and line flow at each bus are set as constraints for the multi-objective optimization method, but the bus voltage may be treated as an objective function that minimizes the difference from a voltage reference value. Furthermore, minimizing the increase or decrease in the power generation costs of the power generation company from the planned value may be calculated as an objective function or constraint. Furthermore, the objective function may be a function that minimizes the value (cost) of the building, the value (cost) of the land, the shortest distance to surrounding transportation infrastructure such as roads and railways, the inverse of the sum of direct and diffuse solar radiation, the results of disaster risk assessments using hazard maps, etc.

[0053] Although several methods are known for multi-objective optimization, such as a weighted sum method using weighting coefficients, the present disclosure is not limited to a specific method. Furthermore, when an initial value is required in the multi-objective optimization method, the current deviation amount and the current deviation amount shown in FIG. 4 can be used as the initial value.

[0054] Fig. 7 is a diagram showing an example of a Pareto solution when minimizing the grid countermeasure costs of the power transmission and distribution business operator and minimizing the storage battery installation costs of the consumer are set as objective functions. The vertical axis of Fig. 7 represents the equipment installation costs of the power transmission and distribution business operator, and the horizontal axis represents the storage battery installation costs of the consumer. Note that the vertical and horizontal axes, i.e., the objective functions, are not limited to the example of Fig. 7.

[0055] The Pareto curve 71 shown in FIG. 7 represents Pareto solutions (solutions that are as close as possible to the ideal solution and have different balances between objective functions), which are solutions obtained by a multi-objective optimization method. As shown by the Pareto curve 71, the higher the cost of installing storage batteries as a result of consumers' investment in installing storage batteries, the lower the cost of grid improvement by the power transmission and distribution utility to install the equipment. In other words, there is a trade-off between the cost of grid improvement by the power transmission and distribution utility and the cost of installing storage batteries by consumers. From the Pareto solutions 72, which are values ​​on the Pareto curve 71, an appropriate solution for both the power transmission and distribution utility and the consumers is selected. The reduction in grid improvement costs due to the consumers' installation of storage batteries becomes the power transmission and distribution utility's profit 73. The method of selecting a Pareto solution may be, for example, automatically selecting a Pareto solution suitable for predetermined conditions by the equipment planning unit 13, or the equipment planning unit 13 may select a Pareto solution according to instructions from an administrator of the equipment introduction support device 1, for example.

[0056] FIG. 8 is a diagram showing the cost burden of grid facilities depending on whether or not a consumer invests in a storage battery.

[0057] By introducing storage batteries and operating them appropriately, it is possible to reduce electricity bills, reduce the costs of operating grid equipment, and reduce the costs for grid stabilization for power transmission and distribution companies.

[0058] However, the benefit A to the consumer must be evaluated by comparing the consumer's equipment operating costs if a storage battery is not installed with the sum of the consumer's equipment operating costs if a storage battery is installed and the storage battery cost B. Taking into account the storage battery cost B, the consumer's benefit A may decrease, and in some cases a loss may occur.

[0059] Therefore, by subsidizing consumers with a portion of the transmission and distribution company's profit 73, which is the reduction in grid countermeasure costs, as a refund C, and reducing the consumers' actual costs D, it is possible to ensure the benefits to consumers and promote the active introduction of storage batteries by consumers.

[0060] In addition, the selection of the Pareto solution 72 on the Pareto curve 71 in FIG. 7 may take into consideration the above-mentioned operating costs of the consumer, the cost of introducing the storage battery, and the amount of rebates.

[0061] FIG. 9 is a sequence diagram illustrating an example of the operation of the equipment introduction support system.

[0062] First, the power transmission and distribution company device 101 performs a system risk assessment process to generate system reinforcement request information 22 by evaluating the power system based on the system information 21 (step S201). The power transmission and distribution company device 101 transmits the system information 21 and the system reinforcement request information 22 to the equipment introduction support device 1 (step S202). In addition, the distributed power source provider device 103 transmits the distributed power source information 25 to the equipment introduction support device 1 (step S203), and the consumer device 102 transmits the consumer constraint conditions 24 and the consumer surroundings information 23 to the equipment introduction support device 1 (step S204).

[0063] Thereafter, as described with reference to FIG. 6, the equipment introduction support device 1 formulates an equipment plan for the distributed power source based on the information 21 to 25 (step S205), and transmits equipment plan information indicating the equipment plan to the power transmission and distribution company device 101 (step S206).

[0064] The power transmission and distribution company device 101 executes a rebate amount formulation process for determining the amount of rebate to the consumer based on the equipment plan information (step S207), and transmits rebate amount information indicating the amount of rebate to the equipment introduction support device 1 (step S208). Note that the equipment plan information includes, as specifications of the type of storage battery to be installed, the charge / discharge output and capacity of the storage battery required for system stability.

[0065] The equipment introduction support device 1 organizes the rebate amount information and the equipment plan information to generate notification information for the consumer (step S209), and transmits the notification information to the consumer device 102 (step S210). The notification information indicates, for example, the location where the storage battery is installed, the installed capacity of the storage battery, the rebate amount, etc.

[0066] The customer device 102 displays the notification information, prompts the customer to select the installation location and installation capacity of the storage battery that the customer desires to install, and transmits the selection result selected by the customer to the equipment introduction support device 1 (step S211).

[0067] The equipment introduction support device 1 determines the installation location of the storage battery based on the selection result from the consumer, and updates the grid information 21 based on the installation location (step S212). The equipment introduction support device 1 transmits the updated grid information 21 to the electricity transmission and distribution company device 101 (step S213), and the electricity transmission and distribution company device 101 registers the updated grid information 21 (step S214). Furthermore, the equipment introduction support device 1 transmits information on the storage battery that the consumer wishes to install to the distributed power source provider device 103 based on the selection result (step S215).

[0068] Thereafter, the power transmission and distribution company device 101 can generate the grid reinforcement request information 22 again based on the updated grid information 21.

[0069] As described above, according to this embodiment, the facilities plan formulation unit 13 proposes installation locations for installing distributed power sources using risk assessment information that evaluates the locations and degrees of deviation from system constraints in the power system, consumer constraint conditions 24 that indicate installation constraints related to the installation of distributed power sources in the supply area to which power is supplied from the power system, and distributed power source information 25 that indicates the specifications of the distributed power sources. Therefore, it becomes possible to propose installation locations for storage batteries taking into account constraints related to the installation of distributed power sources, and it becomes possible to more appropriately locate distributed power sources in order to stabilize the power system.

[0070] In this embodiment, the system risk estimation unit 12 generates risk assessment information using system information indicating the configuration of the power system, which allows the facility plan formulation unit 13 to appropriately acquire risk assessment information used to propose installation locations.

[0071] In this embodiment, the system risk estimation unit 12 generates risk assessment information for when new equipment is introduced into the reinforcement-required location by further using system reinforcement request information indicating locations in the power system that may deviate from system constraints and peripheral information about the consumer's surroundings. In particular, the system risk estimation unit 12 predicts the power generation amount of a renewable energy power generation device, which is the new equipment, and generates risk assessment information based on that power generation amount. This makes it possible to appropriately introduce distributed power sources according to future conditions, etc.

[0072] The system risk estimation unit 12 also evaluates at least one of the frequency, time, and amount of deviation of a target value corresponding to the power flow in the power system from a predetermined allowable range as the deviation degree. These deviation degrees may also be evaluated for each time period. In this case, it becomes possible to appropriately select the installation locations of distributed power sources necessary for strengthening the power system.

[0073] The facility planning unit 13 proposes the type of distributed power source to be installed at the installation location, making it possible to select a distributed power source appropriate for strengthening the grid.

[0074] Furthermore, the facility planning unit 13 proposes installation locations through multi-objective optimization based on multiple deployment objectives, making it possible to appropriately deploy distributed power sources and reinforce the grid in accordance with the circumstances of both consumers and power transmission and distribution companies. [Example]

[0075] 10 is a diagram illustrating a configuration example of an equipment introduction support device 1 according to a second embodiment of the present disclosure. The following mainly describes the parts that are different from the first embodiment.

[0076] The equipment introduction support device 1 shown in FIG. 10 further includes a consumer power demand estimation unit 14 in addition to the configuration of the equipment introduction support device 1 of the first embodiment shown in FIG.

[0077] The consumer power demand estimation unit 14 is a demand estimation unit that generates power demand estimation information that estimates the power demand of consumer facilities that are facilities of consumers to which power is supplied from the power grid, based on the consumer surroundings information 23. In this embodiment, the equipment plan formulation unit 13 further uses the estimated power demand that is the estimation result by the consumer power demand estimation unit 14 to formulate an equipment plan.

[0078] 11 is a diagram showing an example of consumer facility surrounding information 23 in this embodiment. Consumer facility surrounding information 23 shown in FIG. 11 further includes consumer facility operation information 235 and consumer facility importance information 236 in addition to information 231 to 234 shown in FIG.

[0079] The consumer facility operation information 235 is information indicating the operation status of each consumer facility, such as the operation and stop times of the consumer facility in each time slot of a day over a certain period of time, and the amount of power consumed by the consumer facility. The certain period of time may be, for example, one year, one season, or one month. The consumer power demand estimator 14 uses the consumer facility operation information 235 to estimate the power demand of the consumer facility.

[0080] The customer facility importance information 236 indicates the importance of each facility of a customer. For example, the importance increases as the priority of continuing operation in the event of a failure in the power grid increases.

[0081] 12 is a flowchart for explaining an example of the operation of the equipment plan formulation unit 13 in the present embodiment. Note that the same processes as those in FIG. 6 are denoted by the same reference numerals.

[0082] First, the facility plan formulation unit 13 acquires risk assessment information from the system risk estimation unit 12, and further acquires power demand estimation information from the consumer power demand estimation unit 14 (step S101A). If necessary, the system risk estimation unit 12 outputs system information 21, system reinforcement request information 22, and consumer surroundings information 23 used to generate the risk assessment information, along with the risk assessment information, and the facility plan formulation unit 13 also acquires these pieces of information 21 to 23. Here, the system risk estimation unit 12 will be described as acquiring the information 21 to 23.

[0083] The facility planning unit 13 acquires the consumer constraint conditions 24 and the distributed power source information 25 from the information storage unit 11 (step S102).

[0084] The facility plan formulation unit 13 sets an introduction purpose for newly introducing a distributed power source (step S103A). In this embodiment, the facility plan formulation unit 13 sets the introduction purpose taking into consideration the customer facility importance information 236 of the customer surrounding information 23.

[0085] The facility plan formulation unit 13 formulates a facility plan based on the introduction purpose, the information 21 to 25, the risk assessment information, and the power demand estimation information (step S104A).

[0086] Thereafter, the facility planning unit 13 executes the processes of steps S105 to S107 described with reference to FIG.

[0087] As described above, in this embodiment, the consumer power demand estimation unit 14 estimates the power demand of consumer facilities to which power is supplied from the power grid, based on the consumer surroundings information 23. The equipment plan formulation unit 13 formulates an equipment plan further using the estimated power demand that is the result of estimation by the consumer power demand estimation unit 14. This makes it possible to more appropriately select the type and installation location of the distributed power source.

[0088] In this embodiment, the customer surroundings information 23 indicates the importance of the customer facilities to which power is supplied from the power grid. Therefore, in the event of a power grid failure, it is possible to appropriately select a distributed power source that can supply power to facilities that are important to the customer. [Example]

[0089] 13 is a diagram illustrating a configuration example of an equipment introduction support device 1 according to a third embodiment of the present disclosure. The following mainly describes the parts that are different from the first embodiment.

[0090] The equipment introduction support device 1 shown in FIG. 13 differs from the equipment introduction support device 1 of the second embodiment shown in FIG. 10 in that the information storage unit 11 further stores system switching information 26.

[0091] The system switching information 26 is information relating to switches that switch the configuration of the electrode system.

[0092] Fig. 14 is a diagram showing an example of the configuration of the power system risk estimation unit 12 of this embodiment. The power system risk estimation unit 12 shown in Fig. 14 differs from the power system risk estimation unit 12 of the first embodiment shown in Fig. 3 in that a power system analysis unit 123 analyzes the state of the power system based on power system switching information 26. In addition, power system information 21 indicates the configuration of the entire power system including multiple power systems whose configurations can be switched.

[0093] The system analysis unit 123 of this embodiment analyzes the state of each of the multiple switchable power systems using the system information 21 and the system switching information 26. Furthermore, the deviation evaluation unit 124 generates risk assessment information for each of the multiple switchable power systems.

[0094] Fig. 15 is a flowchart for explaining an example of the operation of the facility plan formulation unit 13 in the embodiment 3. Note that the same processes as those in Figs. 6 and 12 are denoted by the same reference numerals.

[0095] First, the equipment plan formulation unit 13 acquires risk assessment information for each power system from the system risk estimation unit 12, and further acquires power demand estimation information from the consumer power demand estimation unit 14 (step S101B). If necessary, the system risk estimation unit 12 outputs, along with the risk assessment information, system information 21, system reinforcement request information 22, consumer surroundings information 23, and system switching information 26 used to generate the risk assessment information, and the equipment plan formulation unit 13 also acquires these pieces of information 21 to 23, 26. Here, the explanation will be given assuming that the system risk estimation unit 12 acquires the information 21 to 23, 26.

[0096] The facility planning unit 13 acquires the consumer constraint conditions 24 and the distributed power source information 25 from the information storage unit 11 (step S102).

[0097] The facility planning unit 13 sets the purpose of introducing the new distributed power source (step S103A).

[0098] The equipment plan formulation unit 13 selects one of the multiple power systems that can be switched as a target power system based on the system switching information 26, and formulates an equipment plan based on the risk assessment information of the target power system, the purpose of implementation, each of the information 21 to 26, and the power demand estimation information (step S104B).

[0099] Thereafter, the equipment plan formulation unit 13 executes the processes of steps S105 to S106 described using Fig. 6. Then, if it is determined in step S106 that the introduction effect is appropriate, the equipment plan formulation unit 13 temporarily stores individual equipment plan information indicating the formulated equipment plan as an individual equipment plan (step S301).

[0100] The facility plan formulation unit 13 checks whether facility plans have been formulated for all of the configurations of the power systems that can be switched based on the system switching information 26 (step S302).

[0101] If not all facility plans have been formulated (step S302: NO), the process returns to step S104A, and another power system is selected as the target power system.

[0102] On the other hand, if all the equipment plans have been formulated (step S302: YES), the equipment plan formulation unit 13 compares the stored individual equipment plan information and selects one of the individual equipment plan information as the equipment plan information (step S303). For example, the equipment plan formulation unit 13 selects, from the individual equipment plans, the individual equipment plan that has the most appropriate introduction effect (for example, the smallest grid countermeasure cost for the power transmission and distribution company).

[0103] Then, the facility plan formulation unit 13 transmits the selected facility plan information to the power transmission and distribution company device 101, the customer device 102, and the distributed power source provider device 103 (step S107), and ends the process.

[0104] As described above, in this embodiment, it is possible to determine the installation location and type of distributed power sources by comparing the facility plans of the respective switchable power systems.

[0105] The above-described embodiments of the present disclosure are merely illustrative examples of the present disclosure, and are not intended to limit the scope of the present disclosure to these embodiments alone. Those skilled in the art may implement the present disclosure in various other forms without departing from the scope of the present disclosure. [Explanation of symbols]

[0106] 1: Equipment introduction support device 11: Information storage unit 12: System risk estimation unit 13: Equipment planning unit 14: Consumer power demand estimation unit 14 101: Power transmission and distribution company device 102: Consumer device 103: Distributed power source provider device 121: Distributed power source introduction amount estimation unit 122: System deviation evaluation unit 123: System analysis unit 124: Deviation evaluation unit

Claims

1. An equipment introduction support device that supports the introduction of distributed power sources to be connected to a power grid, an equipment planning unit that proposes installation locations for the distributed power sources using risk assessment information that evaluates deviation locations and degrees of deviation from system constraints for the power system, constraint condition information that indicates installation constraints related to the installation of the distributed power sources in areas to which power is supplied from the power system, and distributed power source information that indicates specifications of the distributed power sources; a system risk estimation unit that generates the risk assessment information using system information that indicates a configuration of the power system, The equipment introduction support device wherein the system risk estimation unit further uses system reinforcement request information indicating reinforcement request locations in the power system that may deviate from the system constraints, and generates the risk assessment information in a case where new equipment is introduced into the reinforcement request locations.

2. The equipment introduction assistance device according to claim 1 , wherein the system risk estimation unit generates the risk assessment information by further using peripheral information about the area.

3. The surrounding area information includes weather information for the area, The new facility is a renewable energy power generation device, 3. The equipment introduction support device according to claim 2, wherein the system risk estimation unit predicts a power generation amount of the renewable energy power generation device using the peripheral information, and generates the risk assessment information based on the power generation amount.

4. The equipment introduction assistance device according to claim 1 , wherein the equipment plan formulation unit proposes a connection position for connecting the distributed power source to the power grid together with the installation location.

5. 2. The equipment introduction support device according to claim 1, wherein the system risk estimation unit evaluates, as the degree of deviation, at least one of a frequency, a time, and an amount that a target value according to a power flow in the power system deviates from a predetermined allowable range.

6. The equipment introduction support device according to claim 5 , wherein the system risk estimation unit evaluates at least one of the frequency, the time, and the amount for each predetermined time period.

7. the peripheral information indicates an operation status of a customer facility to which power is supplied from the power grid, the equipment introduction support device further includes a demand estimation unit that estimates an electric power demand of the customer equipment based on the peripheral information, The equipment introduction assistance device according to claim 2 , wherein the equipment plan formulation unit further uses the power demand to propose the installation location.

8. The equipment introduction support device according to claim 2 , wherein the peripheral information indicates the importance of customer equipment to which power is supplied from the power grid.

9. the distributed power source information indicates specifications of the distributed power sources for each type of the distributed power sources; The facility introduction assistance device according to claim 1 , wherein the facility plan formulation unit proposes a type of distributed power source to be installed at the installation location.

10. The equipment introduction support device according to claim 1 , wherein the equipment plan formulation unit proposes the installation location so as to achieve a predetermined introduction purpose.

11. There are several purposes for introducing the above. The equipment introduction assistance device according to claim 10 , wherein the equipment plan formulation unit proposes the installation location by multi-objective optimization based on a plurality of the introduction purposes.

12. The configuration of the power system is switchable; the facility planning formulation unit further uses switching information related to switches that switch the configuration of the power system to determine the installation location for each of the switchable power configurations; The equipment introduction assistance device according to claim 1 , wherein the equipment introduction assistance device proposes any one of the installation locations.

13. An equipment introduction support method using an equipment introduction support device that supports the introduction of distributed power sources to be connected to a power grid, comprising: proposing an installation location for installing the distributed power source using risk assessment information that evaluates deviation locations and degrees of deviation from system constraints for the power system, constraint condition information that indicates installation constraints related to the installation of the distributed power source in an area to which power is supplied from the power system, and distributed power source information that indicates specifications of the distributed power source; generating the risk assessment information using system information indicating a configuration of the power system; In generating the risk assessment information, system reinforcement request information indicating reinforcement request locations in the power system that may deviate from the system constraints is further used to generate the risk assessment information in the case where new equipment is introduced into the reinforcement request locations.

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