Individual operation system configuration device, individual operation system configuration system, and individual operation system configuration method

Abstract

To create a system configuration plan for stably supplying power in a single operation of a power distribution system to maximize load capacity to recover from power interruption.SOLUTION: A single operation system configuration device 1000 comprises: a system configuration plan creation unit 200 which creates a system configuration plan; and a single operation propriety determination unit 700 which determines propriety of a single operation for every system configuration plan created by the system configuration plan creation unit 200. Thus, a system configuration plan with the maximum load capacity among the system configuration plans for allowing the single operation can be selected.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a single operation system configuration device, a single operation system configuration system, and a single operation system configuration method that assist in configuring a single operation system while determining whether single operation is possible, for single operation used by a distribution utility or the like.

Background Art

[0002] In recent years, the introduction of distributed power sources such as renewable energy power sources into the power system has been promoted. On the other hand, large-scale disasters such as typhoons and floods are on the increase, and cases of large-scale power outages and prolonged restoration due to backbone system accidents and multiple accidents in the distribution system have become apparent. The power infrastructure is required to respond to these power supply disruptions. In the future, new power system operation is necessary to maximize the utilization of distributed power sources connected to the power system and to achieve wide-area and early power outage restoration and subsequent stable power supply.

[0003] In particular, among the power infrastructures, in the distribution system, the introduction of distributed power sources such as solar power generation has been remarkably promoted, and consideration of single operation in the event of an emergency has been carried out. On the other hand, in single operation, it is expected that it will be a problem that power cannot be supplied stably due to the demand and output of distributed power sources in the single operation system and the transient phenomena during single operation. For this reason, in the event of an emergency, there is a need to stably continue single operation in the distribution system and to maximize the number of customers restored from a power outage.

[0004] As background art in this technical field, there is an invention described in Patent Document 1. In the abstract of this document, it is described that "The power conditioner 100 includes a first independent operation output terminal 107 and a second independent operation output terminal 108, an inverter 102, a first current sensor 105 that detects a first current output by the inverter 102, a second current sensor 106 that detects a second current supplied to either the first independent operation output terminal 107 or the second independent operation output terminal 108, and a control unit 111 that issues a warning or stops the operation of the inverter 102 when the first current becomes equal to or greater than a predetermined first threshold value or the second current becomes equal to or greater than a predetermined second threshold value, and a storage unit 109. The control unit 111 controls the inverter 102 according to the current flowing through the independent operation output terminal with the lower priority and the current of the load connected to the independent operation output terminal with the higher priority."

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The invention described in Patent Document 1 can supply power to a specific load disconnected from the power distribution system while allowing inrush current by using a distributed power source. However, in the invention described in Patent Document 1, it is impossible to determine whether stable power supply to a general load is possible in single operation in the power distribution system, and it is also impossible to maximize the load that is restored from a power outage by single operation. Therefore, an object of the present invention is to create a system configuration plan that stably supplies power during single operation of the power distribution system and maximizes the load capacity restored from a power outage.

Means for Solving the Problems

[0007] To solve the above problems, the single - operation system configuration device of the present invention includes a system configuration plan creation unit that creates a system configuration plan, and a single - operation feasibility determination unit that determines the feasibility of single - operation for each of the system configuration plans created by the system configuration plan creation unit, and thereby can select the system configuration plan with the maximum load capacity among the system configuration plans that can be operated independently. A power usage decomposition unit that decomposes power usage, and a load type demand prediction unit that predicts the power demand of each load type using the power data by usage decomposed by the power usage decomposition unit. It is characterized by comprising the above.

[0008] The single - operation system configuration system of the present invention includes a system configuration plan creation unit that creates a system configuration plan, and a single - operation feasibility determination unit that determines the feasibility of single - operation for each of the system configuration plans created by the system configuration plan creation unit, and thereby can select the system configuration plan with the maximum load capacity among the system configuration plans that can be operated independently. A power usage decomposition unit that decomposes power usage, and a load type demand prediction unit that predicts the power demand of each load type using the power data by usage decomposed by the power usage decomposition unit. It is characterized by comprising the above.

[0009] The single - operation system configuration method of the present invention includes a step in which a system configuration plan creation unit creates a system configuration plan, and a step in which for each of the system configuration plans created by the system configuration plan creation unit, a single - operation feasibility determination unit repeatedly determines the feasibility of single - operation to select the system configuration plan with the maximum load capacity among the system configuration plans that can be operated independently. A step in which the power usage decomposition unit decomposes power usage, and a step in which the load type demand prediction unit predicts the power demand of each load type using the power data by usage decomposed by the power usage decomposition unit. It is characterized by executing the above. Other means will be described in the embodiments for carrying out the invention.

Effects of the Invention

[0010] According to the present invention, it is possible to create a system configuration plan that stably supplies power during the single - operation of the power distribution system and maximizes the load capacity for recovery from power outages.

Brief Description of the Drawings

[0011]

Figure 1

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Figure 11

Mode for Carrying Out the Invention

[0012] Hereinafter, the mode for carrying out the present invention will be described in detail with reference to each figure. FIG. 1 is a block diagram showing the stand-alone operation system configuration device 1000 of the present embodiment. The stand-alone operation system configuration device 1000 includes a system configuration plan creation unit 200, a system analysis setting value setting unit 500, a stand-alone operation determination unit 700, a screen output unit 800, and a display device 900. The stand-alone operation system configuration device 1000 further stores system information 100, past demand data 300, past distributed power source output data 400, system analysis setting values 600, and a stand-alone operation system configuration program in a storage unit (not shown). The stand-alone operation system configuration device 1000 is a computer having a CPU (Central Processing Unit), a RAM (Random Access Memory), and a non-volatile large-capacity storage unit. Note that the present invention is not limited to a single device and may be implemented as a stand-alone operation system configuration system in which a plurality of servers or the like cooperate.

[0013] The system information 100 is information indicating the load capacity for each switch section in the power distribution system 101 (see FIG. 3) managed by this stand-alone operation system configuration device 1000. The system configuration plan creation unit 200 is a functional unit that creates a configuration plan for the stand-alone operation system based on the system information 100, and its processing will be described with reference to FIG. 4 described later.

[0014] The past demand data 300 is data related to the past power consumption, and will be described in detail with reference to FIG. 5 described later. The past demand data 300 is input to the stand-alone operation feasibility determination unit 700. The past distributed power output data 400 is data related to the past distributed power output, and will be described in detail with reference to FIG. 6 described later. The past distributed power output data 400 is input to the stand-alone operation feasibility determination unit 700.

[0015] The system analysis setting value setting unit 500 is a functional unit that sets setting values and the like used for system analysis to the system analysis setting value 600, and its processing will be described with reference to FIG. 7 described later. The system analysis setting value 600 is data related to the setting values used for system analysis, and will be described in detail with reference to FIG. 8 described later. The system analysis setting value 600 is input to the stand-alone operation feasibility determination unit 700.

[0016] The stand-alone operation feasibility determination unit 700 evaluates the system configuration plan created by the system configuration plan creation unit 200 in descending order of load capacity while referring to the past demand data 300, the past distributed power output data 400, and the system analysis setting value setting unit 500, and determines whether the system configuration plan can perform stable stand-alone operation without blackout. The stand-alone operation feasibility determination unit 700 can select the system configuration plan with the largest load capacity among the system configuration plans that can perform stand-alone operation by determining the feasibility of stand-alone operation for each of the system configuration plans created by the system configuration plan creation unit. The configuration and operation of the stand-alone operation feasibility determination unit 700 will be described with reference to FIG. 9 described later.

[0017] The screen output unit 800 is a functional unit that selects and displays the content to be displayed on the display device 900, and its processing will be described with reference to FIG. 10 described later.

[0018] The display device 900 is configured to include, for example, a liquid crystal panel, an organic EL (Electro Luminescence) panel, etc., and displays the display content selected by the operator, etc. The screen displayed on this display device 900 will be described with reference to FIG. 11 described later.

[0019] FIG. 2 is a diagram showing an example of the system information 100. The system information 100 is configured to include a switch number column 110, an adjacent switch number column 111, a load capacity column 112, a customer number column 113, a distributed power source number column 114, and an accident section information column 115. In the switch number column 110, information on the serial number for identifying the switch installed in the power distribution system 101 shown in FIG. 3 is stored. Here, 1 of the serial number corresponds to the switch SW1 shown in FIG. 3. Hereinafter, serial numbers 2 to 4 correspond to switches SW2 to SW4. In the adjacent switch number column 111, information on the serial numbers for identifying all the switches adjacent to the switch corresponding to the switch number is stored.

[0020] Here, in the first row, 1 is stored in the switch number column 110, and 2 and 4 are stored in the adjacent switch number column 111. The first row indicates a single system to which the 4th to 7th customers and the 1st distributed power source shown in FIG. 3 are connected. In the second row, 1 is stored in the switch number column 110, and 3 is stored in the adjacent switch number column 111. The second row indicates a single system to which the 1st to 3rd customers and the substation shown in FIG. 3 are connected.

[0021] In the load capacity column 112, information on the load capacity of the section delimited by the adjacent switches is stored. In the first row, the total load capacity of the 4th to 7th customers is stored. In the second row, the total load capacity of the 1st to 3rd customers is stored. In the customer number column 113, the serial number for identifying the customers of the power distribution system 101 is stored, and information indicating the customers existing in the switch section is stored. Each customer shown in FIG. 3 is indicated by a black circle and a number such as "#1" adjacent thereto.

[0022] In the distributed power source number column 114, there is a serial number for identifying the distributed power sources installed in the power distribution system 101, and information indicating the distributed power sources existing in the switch section is stored. The distributed power source shown in FIG. 3 is a concept including a substation and distributed power sources. In the accident section information column 115, information indicating whether or not the switch section has been opened due to an accident is stored.

[0023] FIG. 3 is a diagram showing an example of the power distribution system 101 managed by the single-operation system configuration device 1000. The power distribution system 101 is configured to include the first to fourteenth consumers, the first and second distributed power sources, a substation, and switches SW1 to SW4. Each consumer is indicated by a black circle node and numbers such as "#1" and "#2" adjacent thereto. The first to third consumers and the substation are arranged between switch SW3 and switch SW1. The first distributed power source and the fourth to seventh consumers are arranged between switch SW1, switch SW2, and switch SW4. The second distributed power source and the ninth to fourteenth consumers are connected by switch SW2. The eighth consumer is connected by switch SW4.

[0024] The system information 100 shown in FIG. 1 is linked to the power distribution system 101 managed by the single-operation system configuration device 1000. The system information 100 indicates positions of, for example, switches, distributed power sources, and distribution substations, and is configured to include, for example, information such as switch numbers, distributed power source numbers, numbers for identifying distribution substations, and consumer numbers corresponding to nodes. The power distribution system 101 managed by the single-operation system configuration device 1000 may have any configuration as long as it is linked to the system information 100, and is not limited to the configuration shown in FIG. 3. Further, each element of the power distribution system 101 managed by the single-operation system configuration device 1000 is linked to position information on a map such as a road or a house.

[0025] FIG. 4 is a flowchart showing the processing of the system configuration plan creation unit 200. When the process starts, the system configuration plan creation unit 200 extracts all the switch numbers of the switches in the power distribution system 101 that it manages from the system information 100, and makes them the first column of the load capacity matrix (step S10).

[0026] After that, the system configuration plan creation unit 200 extracts from the system information 100 the switch numbers of all the switches adjacent to the switch corresponding to the switch number in the first column, makes them the second column of the load capacity matrix, and identifies all the switch sections (step S11). After that, the system configuration plan creation unit 200 extracts the load capacity of each switch section from the system information 100, and makes it the third column of the load capacity matrix (step S12).

[0027] After that, the system configuration plan creation unit 200 assigns area numbers such as area 1 and area 2 to each switch section, and makes them the fourth column of the load capacity matrix (step S13). By these processes, the load capacity of each switch section, the switch numbers of the switches necessary for the configuration of each section, and the adjacent switch sections, that is, the switch sections separated by the same switch, can be uniquely identified by the area number.

[0028] After that, the system configuration plan creation unit 200 creates a load capacity matrix with each area number in the first column and the load capacity of the corresponding switch section in the second column (step S14).

[0029] After that, the system configuration plan creation unit 200 sets a variable that can take natural numbers from 2 to the maximum value of the area number as, for example, n, and moves n in order from 2 to the maximum value of the area number to comprehensively create a system configuration plan composed of one or more switch sections and n switch sections adjacent to each other (step S15). That is, the system configuration plan creation unit 200 creates a system configuration plan based on the combination of switch states.

[0030] Then, the system configuration plan creation unit 200 adds all the area numbers included in each system configuration to the first column of the load capacity matrix in order (step S16). As a result, all system configuration plans consisting of only one switch section and those consisting of one or more switch sections that are necessarily adjacent to, i.e., connectable to, a switch section are created and can be identified by the combination of area numbers.

[0031] After that, the system configuration plan creation unit 200 calculates the load capacity of each system configuration plan from the sum of the load capacities corresponding to each area number (step S17), stores them in the second column of the load capacity matrix respectively (step S18), and then ends the process of FIG. 4. As a result, the load capacity of each system configuration can be referred to from other parts. And the system configuration plan creation unit 200 operates as a functional unit that creates a plurality of system configuration plans with different load or / and power supply configurations respectively.

[0032] FIG. 5 is a diagram showing an example of past demand data 300. The past demand data 300 is composed of a customer number column 301 and a power consumption column 302.

[0033] In the customer number column 301, a serial number for identifying the customers of the distribution system 101 managed by itself is stored, and the same information as the customer number in the system information 100 is stored. In the power consumption column 302, past time-series data on the power consumption of customers measured by, for example, a smart meter owned by the power company is stored. The power consumption column 302 may include the output of distributed power sources such as low-voltage solar power generation.

[0034] FIG. 6 is a diagram showing an example of past distributed power source output data 400. The past distributed power source output data 400 is composed of a distributed power source number column 401 and a distributed power source output column 402.

[0035] In the distributed power source number column 401, a serial number for identifying the distributed power sources of the power distribution system 101 to be managed is stored, and information identical to the distributed power source numbers in the system information 100 is stored. The distributed power source output column 402 contains, for example, past time-series data regarding the output of distributed power sources owned by an electric power company, such as time-series data of the output of high-voltage solar power generation or a system battery system for the grid.

[0036] Figure 7 is a flowchart showing the processing of the system analysis setting value setting unit 500. When the processing starts, the system analysis setting value setting unit 500 receives the input of the setting information that constitutes the system analysis setting value 600 (step S30). The setting information includes, for example, the start time of independent operation, the end time of independent operation, the time interval for frequency analysis, the time interval for current analysis, system constants, inertia constants, load frequency characteristic constants, distributed power source trip determination criteria, independent operation feasibility determination criteria, and the like.

[0037] After that, when the system analysis setting value setting unit 500 stores the input setting information as the system analysis setting value 600 (step S31), the processing in Figure 7 ends. The system analysis setting value setting unit 500 functions as a setting unit for setting the trip criteria for distributed power sources or the independent operation feasibility determination criteria.

[0038] Figure 8 is a diagram showing an example of the system analysis setting value 600. The system analysis setting value 600 is composed of a column 601 for the start time of independent operation, a column 602 for the end time of independent operation, a column 603 for the time interval for frequency analysis, a column 604 for the time interval for current analysis, a column 605 for system constants, a column 606 for inertia constants, a column 607 for load frequency characteristic constants, a column 608 for distributed power source trip determination criteria, and a column 609 for independent operation feasibility determination criteria.

[0039] In the column 601 for the start time of independent operation, the scheduled time to start independent operation is stored. In the column 602 for the end time of independent operation, the scheduled time to end independent operation is stored. In the column 603 for the time interval for frequency analysis, the time interval in the simulation for analyzing the system frequency of the independent operation system is stored.

[0040] In the current analysis time step column 604, the time step in the simulation for analyzing the current flowing through the single operation system is stored. In the system constant column 605, the system constants of the single operation system are stored. In the inertia constant column 606, the inertia constant of the single operation system is stored.

[0041] In the load frequency characteristic constant column 607, the load frequency characteristic constants of the single operation system are stored. In the distributed power source trip determination criterion column 608, the criteria for the distributed power source to trip in the single operation permission determination unit 700 described later are stored. The criteria for the distributed power source to trip are, for example, that the time period during which the frequency deviation in the single operation system during the single operation period is 3.0 Hz or more continues for 1 second or more, or the time period during which the output current of the distributed power source exceeds the rated current of the distributed power source continues for 1 second or more.

[0042] In the single operation permission determination criterion column 609, the criteria for determining whether single operation is possible or impossible in the single operation permission determination unit 700 are stored. The criteria for determining that single operation is possible are, for example, when the root mean square (RMS) value of the frequency deviation in the single operation system during the single operation period is within ±0.2 Hz.

[0043] Figure 9 is a block diagram showing the configuration and operation of the single operation permission determination unit 700. The single operation permission determination unit 700 includes a single system configuration plan extraction unit 701, a power usage decomposition unit 702, a post-restoration demand prediction unit 703, a post-restoration distributed power source output prediction unit 704, an inrush current estimation unit 705, and a system stability analysis unit 706. The single operation permission determination unit 700 determines whether single operation is possible or not for each of a plurality of system configuration plans, and enables selection of the system configuration plan having the maximum load capacity among the system configuration plans that can stably perform single operation.

[0044] First, the single-system configuration plan extraction unit 701 refers to the matrix of load capacities for each system configuration plan from the system configuration plan creation unit 200 and extracts the system configuration plan with the largest load capacity. After that, the single-system configuration plan extraction unit 701 extracts the past demand data in the extracted system configuration plan.

[0045] The power usage decomposition unit 702 decomposes the past demand data in the system configuration plan extracted by the single-system configuration plan extraction unit 701 into the past demand data (power data by usage type) for each load type such as lighting and air conditioning, and the past output data (power data by usage type) of distributed power sources such as low-voltage solar power generation.

[0046] The post-restoration demand prediction unit 703 uses the past demand data (power data by usage type) for each load type decomposed by the power usage decomposition unit 702, or uses both the past demand data (power data by usage type) for each load type and regression analysis to predict the power demand for each load type after restoration. The post-restoration distributed power source output prediction unit 704 predicts the output of the distributed power source after restoration based on the past output data of the distributed power source decomposed by the power usage decomposition unit 702, for example, by regression analysis.

[0047] The inrush current estimation unit 705 sets the parameters of the transformer model, load model, reduced load model, etc. in the system model in time series based on the predicted post-restoration demand for each load type, and at the current analysis time step set in the system analysis setting value 600, simulates the inrush current flowing through the single-operation system after restoration and characteristic of each load type.

[0048] Thereby, the inrush current estimation unit 705 can estimate the current flowing through the single-operation system after restoration while considering the system configuration plan and the inrush currents of the transformer and load that change over time.

[0049] In addition, when the inrush current estimation unit 705 determines that the system analysis setting value 600 has a distributed power source trip determination criterion for current, the distributed power source is tripped at the time when the criterion is satisfied in the simulation. Thereby, the time when the distributed power source trips due to the inrush current of the transformer and the load can be estimated. The inrush current estimation unit 705 models and simulates, for example, the transformer and each load such as lighting and air conditioning with equivalent circuits respectively.

[0050] In addition, the inrush current estimation unit 705 assumes, for example, that all general consumers have the same number of the same type of loads, and models, for example, all transformers and loads in the system. Then, the inrush current estimation unit 705 tunes the parameters of the transformer and load models so that the simulation results before and after reduction are similar. Thereby, the inrush current estimation unit 705 can reduce the transformer and load models to shorten the calculation time.

[0051] Based on the load type demand prediction after power restoration, the distributed power source output prediction, and the inrush current estimation result, the system stability analysis unit 706 simulates, for example, the supply-demand frequency stability at the frequency analysis time intervals set in the system analysis setting value 600. When the system analysis setting value 600 includes, for example, a distributed power source trip determination criterion for frequency, the system stability analysis unit 706 trips the distributed power source at the time when the criterion is satisfied in the simulation. Thereby, the system stability analysis unit 706 can simulate the time change of the frequency deviation and the trip of the distributed power source due to frequency deviation.

[0052] After that, based on the single operation feasibility determination criterion set in the system analysis setting value 600, the system stability analysis unit 706 determines whether single operation is possible with the single operation system configuration plan extracted by the single operation system configuration plan extraction unit 701, and stores information on the combination of the system configuration plan, the load capacity, and the single operation feasibility.

[0053] After that, the single-system configuration plan extraction unit 701 extracts the system configuration plan with the largest load capacity from the load capacity matrix after the system configuration plan determined immediately before. Thereafter, the single-operation feasibility determination unit 700 repeats a series of processes and ends the series of processes when the single-operation feasibility of the system configuration plan with the smallest load capacity is determined. Based on the information of the combination of the system configuration plan, the load capacity, and the single-operation feasibility, the user can select the system configuration plan with the largest load capacity among those that can be stably operated independently. Also, the user can know whether single operation is possible for each system configuration plan.

[0054] FIG. 10 is a flowchart showing the processing of the screen output unit 800. The screen output unit 800 displays, for example, buttons and pull-downs on the display content selection pane 911 (see FIG. 11) on the display device 900 described later. When the operator presses or selects one or more of the buttons and pull-downs displayed on the display device 900, the screen output unit 800 outputs the display content selected by the operator to another pane displayed on the display device 900.

[0055] At this time, the display content that can be selected includes, for example, the single-operation system configuration plan created by the system configuration plan creation unit 200, the switch state for each system configuration plan, the power supply area for each system configuration plan, accident point information, maps of roads, houses, etc., each setting such as the distributed power source trip determination criterion and the single-operation feasibility determination criterion arbitrarily set by the operator in the system analysis setting value setting unit 500, graphs related to the predicted load type demand, graphs related to the predicted distributed power source output, current flowing through the system including the inrush current and system frequency deviation, graphs related to any of the system frequency, the load capacity for each system configuration plan, the single-operation feasibility determination result for each system configuration plan, the root mean square value of the square of the frequency for each system configuration plan, the optimal system configuration plan, etc.

[0056] In addition, the screen output unit 800 may output to the screen each setting of the distributed power trip determination criteria and the single operation allowability determination criteria set by the setting unit in the system analysis. Here, the optimal system configuration plan refers to the one with the largest load capacity among the system configuration plans determined to be capable of single operation. The screen output unit 800 displays the display content selected by the operator through the display content selection pane 911 of the screen 910 shown in FIG. 11 on another pane of the screen 910.

[0057] FIG. 11 is a screen 910 output by the screen output unit 800. The screen 910 is a screen displayed on the display device 900, and the display content selected by the screen output unit 800 is displayed as shown in FIG. 11, for example.

[0058] The display content selection pane 911 is a display for the operator to operate and select the display content to be selected by the screen output unit 800. As a result, the display content selected in the display content selection pane 911 is displayed on other panes.

[0059] Each setting arbitrarily set by the operator is displayed in the analysis condition pane 912. Information constituting, for example, the system analysis setting value 600 is displayed in the analysis condition pane 912. In FIG. 11, the single operation start time, single operation end time, system constants, inertia constants, load frequency characteristic constants, distributed power trip determination criteria, single operation allowability determination criteria, etc. are displayed.

[0060] In the map pane 914, the system configuration plan and a map of roads, houses, etc. whose positional relationship corresponds to this are superimposed and displayed. The system configuration plan is a system diagram colored so that each system can be identified. On the system diagram, for example, the open and closed switches are color-coded to indicate the switch states in the system, and the position of the accident point 9141 is displayed with a symbol such as a cross mark. On the map, for example, the area 9142 supplied with power by single operation is color-coded and displayed.

[0061] The analysis result pane 915 displays the simulation results regarding the standalone operation according to the system configuration plan stored in the standalone operation feasibility determination unit 700. In FIG. 11, as the simulation results, graphs regarding the predicted load type demand, graphs regarding the frequency or frequency deviation of the standalone operation system, graphs regarding the current flowing through the standalone operation system including the inrush current, the root mean square value of the square of the frequency deviation for each standalone operation system, the load capacity for each system configuration plan, and the standalone operation feasibility determination results for each system configuration plan are displayed. However, the simulation results in the analysis result pane 915 are not limited to this, and may be graphs regarding the predicted distributed power output, etc. The simulation results are displayed according to the system configuration plan. However, when it is selected to display the optimal system configuration plan on the screen output unit 800, for example, on the screen 910, the display content corresponding to the system configuration plan with the largest load capacity among the standalone operation system configuration plans determined to be capable of standalone operation is displayed.

[0062] (Modification example) The present invention is not limited to the above-described embodiments, and includes various modification examples. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is also possible to add, delete, or replace other configurations for a part of the configuration of each embodiment.

[0063] Each of the above configurations, functions, processing units, processing means, etc. may be realized by hardware such as an integrated circuit for a part or all of them. Each of the above configurations, functions, etc. may also be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, files for realizing each function can be placed in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as a flash memory card, a DVD (Digital Versatile Disk).

[0064] In each embodiment, the control lines and information lines show those considered necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In reality, it may be considered that almost all components are interconnected.

Explanation of Signs

[0065] 1000 Stand-alone operation system configuration device 100 System information 101 Power distribution system 110 Switch number column 111 Adjacent switch number column 112 Load capacity column 113 Customer number column 114 Distributed power source number column 115 Fault section information column 200 System configuration plan creation section 300 Past demand data 301 Customer number column 302 Power consumption column 400 Past distributed power source output data 401 Distributed power source number column 402 Distributed power source output column 500 System analysis setting value setting section (setting section) 600 System analysis setting values 601 Stand-alone operation start time column 602 Stand-alone operation end time column 603 Frequency analysis time interval column 604 Current analysis time interval column 605 System constant column 606 Inertia constant column 607 Load frequency characteristic constant column 608 Distributed power source trip determination criterion column 609 Stand-alone operation feasibility determination criterion column 700 Stand-alone operation feasibility determination section 701 Stand-alone system configuration plan extraction section 702 Power use decomposition section 703 Post-restoration demand prediction section (load type demand prediction section) 704 Post-recovery Distributed Power Output Prediction Unit 705 Inrush Current Estimation Unit 706 Power System Stability Analysis Unit 800 Screen Output Unit 900 Display Device 910 Screen 911 Display Content Selection Pane 912 Analysis Condition Pane 914 Map Pane 915 Analysis Result Pane

Claims

1. A system configuration plan creation unit that creates a system configuration plan, A single operation feasibility determination unit that can select the system configuration plan with the maximum load capacity among the system configuration plans that can be operated independently by determining the feasibility of single operation for each of the system configuration plans created by the system configuration plan creation unit, A power use decomposition unit that decomposes power uses, A load type demand prediction unit that predicts the power demand by load type using the power data by use decomposed by the power use decomposition unit, A single operation system configuration device, characterized by comprising these components.

2. The load type demand prediction unit predicts the power demand by load type using the power data by use decomposed by the power use decomposition unit, or using both the power data by use and regression analysis. The single operation system configuration device according to Claim 1, characterized by this.

3. A system configuration plan creation unit that creates a system configuration plan, A single operation feasibility determination unit that can select the system configuration plan with the maximum load capacity among the system configuration plans that can be operated independently by determining the feasibility of single operation for each of the system configuration plans created by the system configuration plan creation unit, An inrush current estimation unit that estimates the inrush current characteristic of each load type using a load model or a reduced load model, A single operation system configuration device, characterized by comprising these components.

4. Based on the predicted load type demand after power restoration, the inrush current estimation unit sets the parameters of the transformer model and / or the load model in the system model in time series. The single operation system configuration device according to Claim 3, characterized by this.

5. The system configuration plan creation unit creates a plurality of system configuration plans with different configurations of loads and / or power sources respectively. The single operation feasibility determination unit determines the feasibility of single operation for each of the plurality of system configuration plans. The single operation system configuration device according to Claim 1, characterized by this.

6. The single operation feasibility determination unit can determine the system configuration plan with the maximum load capacity among the system configuration plans that can be stably operated independently. The single operation system configuration device according to Claim 1, characterized by this.

7. The system configuration plan creation unit creates a system configuration plan by a combination of switch states. The single operation system configuration device according to Claim 1, characterized by this.

8. The system configuration plan creation unit calculates a matrix of load capacities for each single operation system configuration plan. The single operation system configuration device according to Claim 1, characterized by this.

9. A setting unit that sets a trip criterion for a distributed power source or a criterion for determining whether independent operation is possible. The independent operation system configuration device according to claim 1, characterized by having the above.

10. The independent operation determination unit determines whether independent operation is possible based on the trip criterion of the distributed power source set by the setting unit. The independent operation system configuration device according to claim 9, characterized by the above.

11. It has a screen output unit that selects the system configuration plan created by the system configuration plan creation unit and outputs it to the screen. The independent operation system configuration device according to claim 1, characterized by having the above.

12. The screen output unit outputs the switch state for each system configuration plan and / or the power supply area for each system configuration plan to the screen. The independent operation system configuration device according to claim 11, characterized by the above.

13. The screen output unit outputs the map of the power distribution system to be managed and the accident point information to the screen. The independent operation system configuration device according to claim 11, characterized by the above.

14. The screen output unit outputs each setting of the distributed power source trip determination criterion and / or the independent operation determination criterion set by the setting unit in the system analysis to the screen. The independent operation system configuration device according to claim 11, characterized by the above.

15. For each system configuration plan, the screen output unit outputs to the screen any one of a graph related to the predicted load type demand, a graph related to the predicted distributed power source output, and a graph related to any one of the current flowing through the system including the inrush current, the system frequency deviation, and the system frequency. The independent operation system configuration device according to claim 11, characterized by the above.

16. For each system configuration plan, the screen output unit outputs to the screen any one of the load capacity, the independent operation determination result, and the root mean square value of the frequency deviation. The independent operation system configuration device according to claim 11, characterized by the above.

17. The screen output unit outputs to the screen the system configuration plan with the largest load capacity among the system configuration plans determined to be capable of independent operation. The independent operation system configuration device according to claim 11, characterized by the above.

18. A system configuration plan creation unit that creates a system configuration plan. For each of the system configuration plans created by the system configuration plan creation unit, an independent operation determination unit that can select the system configuration plan with the largest load capacity among the system configuration plans capable of independent operation by determining whether independent operation is possible. A power use decomposition unit that decomposes the power use. A load type demand prediction unit that predicts the power demand by load type using the power data by use decomposed by the power use decomposition unit; A single operation system configuration system characterized by comprising the above.

19. A system configuration plan creation unit that creates a system configuration plan; For each of the system configuration plans created by the system configuration plan creation unit, a single operation feasibility determination unit that can select the system configuration plan with the largest load capacity among the system configuration plans that can be operated alone by determining the feasibility of single operation; An inrush current estimation unit that estimates an inrush current characteristic of each load type using a load model or a reduced load model; A single operation system configuration system characterized by comprising the above.

20. A step in which the system configuration plan creation unit creates a system configuration plan; A step in which, for each of the system configuration plans created by the system configuration plan creation unit, the single operation feasibility determination unit repeatedly determines the feasibility of single operation to select the system configuration plan with the largest load capacity among the system configuration plans that can be operated alone; A step in which the power use decomposition unit decomposes the power use; A step in which the load type demand prediction unit predicts the power demand by load type using the power data by use decomposed by the power use decomposition unit; A single operation system configuration method characterized by executing the above.

21. A step in which the system configuration plan creation unit creates a system configuration plan; A step in which, for each of the system configuration plans created by the system configuration plan creation unit, the single operation feasibility determination unit repeatedly determines the feasibility of single operation to select the system configuration plan with the largest load capacity among the system configuration plans that can be operated alone; A step in which the inrush current estimation unit estimates an inrush current characteristic of each load type using a load model or a reduced load model; A single operation system configuration method characterized by executing the above.

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