JP2012005210A - Distribution system power flow simulation device, distribution system power flow simulation method, and program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform distribution system power flow simulation which considers a consumed electric power by a customer and a reversal power flow respectively.SOLUTION: A distribution system power flow simulation device 100 includes: a distribution system power flow calculation part 10 which calculates a power flow in a distribution system from a substation 1 to a pole transformer 5 using a load power at the pole transformer 5; a customer load simulation part 80 which simulates a time fluctuation of the load power which the customer uses; a distributed power source simulation part 90 which simulates time fluctuation of generated power that is generated by the distributed power sources; and a system state managing part 30 which acquires a load power or a generated power at a specified time point from a plurality of customer load simulation parts 80 and distributed power source simulation parts 90, calculates a load power at respective pole transformers 5 arranged in the distribution system by using the acquired load power and generated power, and inputs the calculated load power at the pole transformer 5 to the distribution system power flow calculation part 10, to make the distribution system power flow calculation part 10 execute power flow calculation.

Description

  The present invention relates to a distribution system power flow simulation apparatus suitable for a power distribution system in a smart grid environment, a power distribution system power flow simulation method, and a program thereof.

  In recent years, the introduction of power generation facilities using natural energy that does not emit carbon dioxide such as sunlight and wind power is expanding to consumers such as general households. The surplus power obtained by such solar power generation is sent to the power distribution system of the power company as reverse power flow. The reverse power flow is a major disturbance factor for the distribution lines of the power company in managing the voltage. Moreover, since the power of the reverse power flow is derived from natural energy, it is likely to be affected by the weather, which may make it difficult to manage the voltage on the distribution lines of the power company.

  In consideration of the above situation, and in order to facilitate the management or control of consumer power use by DSM (Demand Side Management), etc., power distribution facilities including power meters in consumers are highly functional. , Information equipment, that is, smart grid is about to be achieved. For example, a server of an electric power company can collect power usage and reverse power flow from a wattmeter in each home in real time. In that case, it is also possible to perform voltage management in the distribution line using the collected power consumption, reverse power flow, and the like.

  At present, what happens when reverse power flow from ordinary households increases, or how to manage voltage fluctuations in the distribution system due to reverse power flow? However, sufficient knowledge has not been obtained yet. As a means for obtaining the knowledge in advance, there is a computer simulation.

  Patent Document 1 discloses a technique relating to distribution system simulation for calculating a voltage distribution in a distribution line from a substation at the end of a high-voltage transmission line to a customer such as a factory having a private power generation (cogeneration power generation) device. . The distribution system simulation technology is notable because it takes into account the reverse power flow from customers and includes the handling of small-scale customers such as ordinary households.

JP 2004-56996 A

  However, the distribution system power flow simulation technique disclosed in Patent Document 1 is intended only for the distribution system part from the substation to the transformers and pole transformers of the factory. However, it is not intended to individually simulate the power consumption and reverse power flow of a large number of consumers such as ordinary households. Therefore, the simulation technique disclosed in Patent Document 1 appropriately simulates an environment in which various power generators such as sunlight and wind power are introduced into a large number of ordinary homes, and a wattmeter for a smart grid is widely used. It is difficult to do.

  Accordingly, an object of the present invention is to provide a power distribution system power flow simulation apparatus, a power distribution system power flow simulation method, and a program thereof capable of individually considering the power used and the reverse power flow of many consumers.

The distribution system power flow simulation device according to the present invention simulates a power flow in a power distribution system from a substation to a consumer load via a pole transformer,
(1) A distribution system power flow calculation unit that calculates the power flow in the distribution system from the substation to the pole transformer using the load power in the pole transformer,
(2) a plurality of customer load simulation units for individually simulating time fluctuations of load power respectively used by a plurality of consumers;
(3) A plurality of distributed power source simulation units that individually simulate temporal variations of the generated power generated by each of the plurality of distributed power sources,
(4) Obtain load power or generated power at a specified time from each of the plurality of customer load simulation units and the plurality of distributed power supply simulation units, and deploy to the distribution system using the obtained power Calculate the load power in each of the multiple pole transformers that are used, input the calculated load power in the pole transformer to the distribution system power flow calculation unit, and execute the power flow calculation in the power distribution power flow calculation unit A system state management unit
It is characterized by having.

  In the power distribution system power flow simulation device according to the present invention, a plurality of consumer load simulation units and distributed power supply simulation units can be provided. It is possible to individually simulate fluctuations in the generated power of a distributed power source such as solar power generation that has been introduced in the past. The fluctuations in load power and the fluctuations in the power generated by the distributed power sources at the plurality of consumers are added together and input to the distribution system power flow calculation unit as the load on the pole transformer.

  Therefore, the distribution system power flow calculation unit calculates the power flow in the distribution system that is closer to reality, taking into account the results of individual simulations of the fluctuations in the load power and the distributed power generated by multiple small customers. Is possible.

  ADVANTAGE OF THE INVENTION According to this invention, the power distribution system power flow simulation apparatus, power distribution system power flow simulation method, and program which can consider the electric power used and the reverse power flow of many consumers individually can be provided.

The figure which showed the example of the structure of the power distribution system with which the power distribution system power flow simulation apparatus which concerns on embodiment of this invention is applied. The figure which showed the example of the structure of the functional block of the power distribution system power flow simulation apparatus which concerns on embodiment of this invention. The figure which showed the example of the structure of the module for modularizing the functional block which comprises the power distribution system power flow simulation apparatus which concerns on embodiment of this invention. It is the figure which showed the example of the structure of the profile table in FIG. 3, (a) is an example of the profile table of a consumer load simulation part, (b) is an example of the profile table of a system state management part. The figure which showed the example of the execution procedure of the power distribution system power flow simulation in the power distribution system power flow simulation apparatus which concerns on embodiment of this invention. The figure which showed the example of the execution procedure of the determination process of the module structure in FIG. The figure which showed the example of the screen which receives the data input of the profile item which is not set in FIG. The figure which showed another example of the execution procedure of the determination process of the module structure in FIG. The figure which showed another example of the execution procedure of the power distribution system simulation in the power distribution system power flow simulation apparatus which concerns on embodiment of this invention. The figure which showed the example of the functional block structure of the power distribution system power flow simulation apparatus which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a configuration of a power distribution system to which a power distribution system power flow simulation device according to an embodiment of the present invention is applied. In the present embodiment, the power distribution system refers to a power transmission system portion from the substation 1 to the consumers 7 and 7a in the power transmission system that connects power consumers to power consumers. In electric power companies and the like, the transmission line from the terminal substation 1 to the pole transformer 5 is called the distribution line 2, and from the pole transformer 5 to the consumers 7 and 7a such as ordinary households. The power transmission line is called a lead-in line 6. In general, the voltage of the distribution line 2 is 6.6 kV, and the voltage of the lead-in line 6 is 100 V or 200 V.

  As shown in FIG. 1, on the distribution line 2, a switch 3 is provided as appropriate for safety and accident countermeasures, and a step voltage regulator (SVR) 4 is provided as appropriate for voltage adjustment. The SVR 4 is a kind of transformer, and is usually provided at a position remote from the substation 1 on the distribution line 2 and is usually used for boosting the dropped voltage. In addition, pole transformers 5 are provided at a plurality of positions branching from the distribution line 2, and a plurality of customers are provided on a lead-in line 6 (also referred to as a branch branch line) drawn from the pole transformer 5. 7, 7a are connected. Here, the customer 7 includes a power meter 71, a load device 72, and a distributed power source 73. Further, the customer 7 a is configured to include a power meter 71 and a load device 72, but does not include a distributed power source 73.

  The load devices 72 included in the consumers 7 and 7a include, for example, lighting equipment, air conditioning equipment (air conditioner, kotatsu, etc.), audio / video equipment (TV, radio, etc.), information / communication equipment (computer, telephone, etc.) ), Various household appliances such as housework / cooking equipment (washing machines, vacuum cleaners, microwave ovens, etc.). The distributed power source 73 represents a solar power generation device, a wind power generation device, a power storage device, or the like.

  The power meter 71 is, for example, an AMI (Advanced Metering Infrastructure), and communicates with a management server (not shown) that manages the state of the distribution line 2 as well as the function of measuring the power of the forward flow and the reverse flow. It has functions. Furthermore, the wattmeter 71 may have a so-called DSM (Demand Side Management) function, and may appropriately control the load device 72 of the consumer 7 to control its power usage.

  FIG. 2 is a diagram showing an example of a functional block configuration of the distribution system power flow simulation device according to the embodiment of the present invention. As shown in FIG. 2, the distribution system power flow simulation device 100 according to the embodiment of the present invention includes a power distribution system power flow calculation unit 10, a power flow calculation cooperation unit 20, a system state management unit 30, a network communication unit 40, and a customer load simulation. The unit 80 and the distributed power supply simulation unit 90 are configured to include functional blocks. In FIG. 2, a part of the configuration of the distribution system shown in FIG. 1 is also shown in order to clearly indicate which part of the distribution system to be applied is simulated by each functional block. Yes.

  Hereinafter, functions of functional blocks included in the distribution system power flow simulation device 100 will be described with reference to FIG.

  The distribution system power flow calculation unit 10 is a functional block that simulates the power flow in the distribution system part from the substation 1 to the pole transformer 5, that is, the so-called distribution line 2 part. That is, when the load power for the pole transformer 5 is input, the distribution system power flow calculation unit 10 determines the voltage at each point on the distribution line 2 (including the position on the secondary side of the pole transformer 5). Calculate the value. Here, in the calculation of the voltage value, the electrical operation of the pole transformer 5, the SVR 4, and the switch 3 is considered.

  In addition, the power flow simulation of the portion related to the distribution line 2 performed by the distribution system power flow calculation unit 10 as described above is a known technique as disclosed in Patent Document 1, for example. Therefore, a detailed description of the voltage value calculation method and the like is omitted here.

  The customer load simulation unit 80 simulates time fluctuations in units of one day of power used by the customers 7 and 7a (see FIG. 1). When a certain time is input, the meter value (power amount) of the wattmeter 71 at that time is output based on the simulation result.

  Here, in the customer load simulation unit 80, any specific method for realizing the simulation may be used. For example, the customer load simulation unit 80 prepares a use schedule of lighting devices and home appliances according to the family structure of the customers 7 and 7a and the rhythm of life in a table, and uses based on the use schedule It is also possible to simulate power fluctuation over time. Further, more simply, the time variation itself of the used power is prepared as a table, and the used power is acquired from the table, or even the actual measured value of the wattmeter 71 may be used. Good.

  The distributed power supply simulation unit 90 simulates time fluctuations of power generated by the distributed power supply 73 such as a solar power generation device or a wind power generation device owned by the customer 7 on a daily basis. When a certain time is input, the value of 71 meters at that time is output based on the simulation result. At this time, the value of the meter of the wattmeter 71 represents the amount of power of reverse flow. In the present embodiment, it is assumed that the wattmeter 71 can separately measure the load power amount (forward power flow) and the generated power amount (reverse power flow) at the same time.

  Here, the specific method for realizing the simulation in the distributed power supply simulation unit 90 may be any as in the case of the customer load simulation unit 80. For example, the distributed power supply simulation unit 90 may be one that defines the amount of solar radiation and wind power fluctuations in a table or function and acquires the generated power according to the amount of solar radiation or wind power. Furthermore, more simply, even if the generated power generation time variation itself is prepared as a table and the amount of generated power is acquired from the table, the actual measured value of the wattmeter 71 is also used. Also good.

  By the way, in this embodiment, the consumer load simulation unit 80 and the distributed power supply simulation unit 90 are provided in a form corresponding to the load devices 72 and the distributed power supply 73 of the consumers 7 and 7a to be simulated, respectively. In addition, the load power and generated power in the consumers 7 and 7a may be different from each other. In addition, if the consumer load simulation part 80 simulates the time fluctuation of electric power used, for example using the table of the usage schedule of lighting equipment and household appliances as described above, the contents of the table are changed. Thus, it is possible to easily change the usage status of power for each of the consumers 7 and 7a.

  In the present embodiment, the load device 72 and the distributed power source 73 of each customer 7, 7 a are connected to any of the service lines 6 among the service lines 6 branched from the distribution line 2 via the pole transformer 5. Or configured to be identifiable. The configuration information is managed by the system state management unit 30 as will be described later.

  The system state management unit 30 mainly has a function of managing the execution of simulations in the distribution system power flow calculation unit 10, the customer load simulation unit 80, the distributed power supply simulation unit 90, and the like.

  That is, the system state management unit 30 transmits the time information via the network communication unit 40 to each of the customer load simulation unit 80 and the distributed power supply simulation unit 90, thereby executing the simulation. The meter value of the wattmeter 71 can be read from each customer load simulation unit 80 and the distributed power supply simulation unit 90.

  Moreover, the system state management part 30 totals the meter value of the wattmeter 71 read from each of the consumer load simulation part 80 and the distributed power supply simulation part 90 for each lead-in line 6 to which they are connected. The load power (total load power 201) for the pole transformer 5 to which the lead-in wire 6 is connected is calculated. Then, the total load power 201 is input to the power distribution system power flow calculation unit 10 via the power flow calculation cooperation unit 20 and the power distribution flow calculation unit 10 is requested to execute a power flow simulation.

  Furthermore, the system state management unit 30 acquires the voltage value at the position of the pole transformer 5 obtained as a result of the simulation in the distribution system power flow calculation unit 10, that is, the voltage value of the service line 6, and the acquired service line 6 The voltage value is transmitted to each of the customer load simulation unit 80 and the distributed power supply simulation unit 90 via the network communication unit 40.

  The tidal current calculation cooperation unit 20 has a function of matching an interface of information transmitted and received between the power distribution system tidal current calculation unit 10, the customer load simulation unit 80, and the distributed power source simulation unit 90. Therefore, it may be considered as a lower functional block included in the system state management unit 30.

  The network communication unit 40 simulates information communication between the system state management unit 30, the customer load simulation unit 80, and the distributed power supply simulation unit 90. However, the communication protocol does not have to be the same as that used in actual communication, for example, communication between the management server (not shown) and the wattmeter 71 included in the customer 7 or 7a. The protocol may be a simplified version of a protocol actually used.

  As described above, in the distribution system power flow simulation device 100 of the present embodiment, the customer load simulation unit 80 and the distributed power supply simulation unit 90 that can simulate the load power and the generated power that fluctuate in various forms, The power flow of the distribution system can be simulated according to the arrangement of the actual distribution line 2, pole transformer 5, and lead-in line 6. Therefore, simulation of the power flow of the distribution system can be performed more faithfully.

  In the embodiment described above, the power distribution system power flow simulation device 100 does not perform a detailed power flow simulation for the lead-in wire 6, and the voltage on the secondary side of the pole transformer 5 is changed to each customer 7, 7a is applied to the load device 72 and the distributed power source 73. The same simulation as that of the power distribution system power flow calculation unit 10 is applied to the lead-in line 6, and the lead-in line 6 is also applied. The voltage value at each point on the lead-in line 6 may be calculated.

  Next, a specific method for realizing the distribution system power flow simulation device 100 using a computer will be described.

  2 is realized by a computer including a CPU (Central Processing Unit) and a storage device including a RAM (Random Access Memory), a hard disk device, and the like. be able to. In that case, the CPU stores the functional blocks such as the distribution system power flow calculation unit 10, the power flow calculation cooperation unit 20, the system state management unit 30, the network communication unit 40, the customer load simulation unit 80, and the distributed power supply simulation unit 90. This is realized by executing a program corresponding to each functional block stored in the apparatus.

  Further, in the present embodiment, considering the original purpose of the simulation, the distribution system power flow simulation device 100 needs to be equipped with a large number of various customer load simulation units 80 and distributed power supply simulation units 90. . In that case, if the distribution system power flow simulation device 100 is to be realized by a single computer, the processing load on the computer may be excessive.

  Therefore, in that case, the power distribution system power flow simulation device 100 may be realized by using a plurality of computers connected to each other via a communication network. For example, the power distribution system power flow calculation unit 10 is realized by a first computer, the power flow calculation cooperation unit 20 and the system state management unit 30 are realized by a second computer, and a large number of customer load simulation units 80 and distributed power supplies The simulation unit 90 may be realized by a plurality of computers after the fourth. By using a plurality of computers, the processing load on each computer can be reduced and the simulation time can be shortened.

  Furthermore, in this embodiment, a large number of various customer load simulation units 80 and distributed power source simulation units 90 are arranged in the distribution system to be simulated according to the actual configuration of the distribution system and the customers 7 and 7a. In addition, there is a need to change the arrangement or to add a new customer load simulation unit 80 or a distributed power supply simulation unit 90. Therefore, in this embodiment, in order to facilitate the response to the necessity, modularization of the functional blocks constituting the power distribution system power flow simulation device 100 is attempted. Here, the modularization of the functional blocks means to unify the structure of the program that realizes the functional blocks, particularly to unify the interface structure between modules.

  FIG. 3 is a diagram illustrating an example of the configuration of a module for modularizing the functional blocks constituting the power distribution system power flow simulation device 100. In the present embodiment, the module 110 includes a module application 111, an input / output middle 112, and a profile middle 115 as shown in FIG. Then, all or some of the functional block programs constituting the power distribution system power flow simulation device 100 are configured in a structure according to the structure of the module 110.

  In FIG. 3, the module application 111 is a program for realizing the function of the functional block to be modularized. In this embodiment, functional blocks such as the system state management unit 30, the customer load simulation unit 80, and the distributed power supply simulation unit 90 are realized by the module 110. In this case, the functions of these functional blocks are the functions of the module application 111. Described in the program. Therefore, the module application 111 is different for each functional block.

  On the other hand, the input / output middle 112 is configured to include an input data processing unit 113 and an output data processing unit 114, and is middleware for facilitating the description of data input / output processing in the module application 111. The profile middle 115 includes a profile table 116, and is middleware for facilitating access (reading and writing of data) to the profile table 116 from the module application 111 or another external module 110. is there. That is, the input / output middle 112 and the profile middle 115 do not depend on functional block differences, that is, they are programs common to all modules 110.

  Incidentally, the input / output middle 112 has a function of transmitting / receiving messages and data to / from other modules 110 via the network communication unit 40 in accordance with instructions from the module application 111. The profile middle 115 has a function of accessing the profile table 116 in accordance with an instruction from the module application 111 or the input / output middle 112.

  4A and 4B are diagrams illustrating an example of the configuration of the profile table 116. FIG. 4A is an example of the profile table 116a of the customer load simulation unit 80, and FIG. 4B is a profile table 116b of the system state management unit 30. It is an example.

  As shown in FIG. 4A, the profile table 116a of the customer load simulation unit 80 includes own module attribute information 1161a and simulation information 1162a. Further, the own module attribute information 1161a is configured by information identifying the own module 110 such as a module ID, a module type ID, a module application ID, a time stamp ID, an IP address, a branch branch ID, and a module geographic coordinate.

  Here, the module ID is identification information for individually identifying the consumer load simulation unit 80, the module type ID is information indicating that the own module 110 is the consumer load simulation unit 80, and the module application ID is the own module. Information identifying the module application 111 of 110, the time stamp ID is identification information of the time stamp of the own module 110, and the IP address is an Internet protocol address assigned to the own module 110. Further, the branch branch line ID is identification information of the service line 6 to which the customers 7 and 7a simulated by the own module 110 are connected, and the module geographical coordinates are latitudes indicating the positions of the customers 7 and 7a simulated by the own module 110. -Longitude information or equivalent information.

  Thus, the own module attribute information 1161a is attribute information for specifying the own module 110 in the simulation. In the present embodiment, such own module attribute information 1161a may be hereinafter referred to as an ini file.

  Next, simulation information 1162a includes simulation ID, current time, grid voltage, grid voltage time, wattmeter / forward current measurement value, wattmeter / forward current measurement time, wattmeter / reverse current measurement value, wattmeter / reverse power flow. It consists of information indicating the simulation status, such as the measurement time.

  Here, the simulation ID is information for identifying the execution of the simulation, the current time is the time during the simulation execution, the system voltage is the value of the voltage applied to the customers 7 and 7a simulated by the own module 110 The system voltage time is the time when the system voltage is acquired. Also, the wattmeter / forward current measurement value and the wattmeter / reverse current measurement value are respectively the measured forward wattage amount and reverse tide power obtained from the wattmeter 71 of the customer 7, 7 a simulated by the own module 110. A measure of quantity.

  As described above, the simulation information 1162a is information for the module application 111 of the own module 110 to provide information indicating a simulation state to the outside in the simulation.

  4A is an example of the profile table 116a of the customer load simulation unit 80, the profile table 116 of the distributed power supply simulation unit 90 can be applied with almost no change in its configuration. .

  Next, as shown in FIG. 4B, the profile table 116b of the system state management unit 30 includes own module attribute information 1161b and module management information 1162b. Here, the own module attribute information 1161b includes information for identifying the own module 110 such as a module ID, a module type ID, a module application ID, a time stamp ID, and an IP address. Further, the module management information 1162b is information obtained by connecting the own module attribute information 1161 (ini file) of the profile table 116 of the customer load simulation unit 80 to be managed by the system state management unit 30 and the distributed power supply simulation unit 90.

  The profile table 116b of the system state management unit 30 corresponds to information stored in the module management information storage unit 31 of the system state management unit 30 in FIG.

  FIG. 5 is a diagram illustrating an example of an execution procedure of the power distribution system power flow simulation in the power distribution system power flow simulation device 100. As shown in FIG. 5, in the distribution system power flow simulation in the power distribution system power flow simulation device 100, each of the customer load simulation unit 80 and the distributed power supply simulation unit 90 transmits a module activation message to the system state management unit 30 (step S01). ). Here, the module activation message is a message indicating that each of the consumer load simulation unit 80 and the distributed power supply simulation unit 90 has started execution of the program of the own module 110.

  Next, when the system state management unit 30 receives a module activation message from each of the customer load simulation unit 80 and the distributed power supply simulation unit 90, the system state management unit 30 determines a module configuration to be simulated based on the received module activation message. (Step S02). Here, the confirmation of the module configuration means that the module 110 of the managed customer load simulation unit 80 and the distributed power supply simulation unit 90 to be managed by the system state management unit 30 is determined. This means that the content of the profile table 116b of the state management unit 30 is confirmed. The module configuration determination process will be described in detail separately with reference to FIG.

  Next, the system state management unit 30 transmits time information for executing the simulation to the customer load simulation unit 80 and the distributed power supply simulation unit 90 to be simulated (step S03). And each customer load simulation part 80 and distributed power supply simulation part 90 which received the time information calculate load electric power or generated electric power (Step S04), and load electric power or electric power generation obtained by the calculation, It transmits to the system state management part 30 (step S05).

  Next, when the system state management unit 30 receives the load power or the generated power transmitted from each of the customer load simulation unit 80 and the distributed power supply simulation unit 90, the received load power and the generated power are received for each lead-in line 6. The total load power 201 (see FIG. 2) for the pole transformer 5 connected to the service line 6 is calculated (step S06), and the calculated total load power 201 is transmitted to the tidal current calculation cooperation unit 20 ( Step S07).

  Next, when the tidal current calculation cooperation unit 20 receives the total load power 201, the tidal power calculation cooperation unit 20 attaches the total load power 201 to the distribution system power flow calculation unit 10 to instruct the power flow calculation in the distribution line 2. (Step S08). The distribution system power flow calculation unit 10 executes the power flow calculation of the instructed power (step S09), and as a result, the system state management unit 30 receives voltage values (hereinafter referred to as system voltage) at each point on the distribution line 2. Is output (step S10).

  When the system state management unit 30 receives the system voltage from the distribution system power flow calculation unit 10, the system voltage (in this case, the output voltage on the secondary side of the pole transformer 5) is simulated for each customer load. Is transmitted to the unit 80 and the distributed power supply simulation unit 90 (step S11), and it is determined whether or not to end the simulation (step S12). If the simulation is not terminated (No in step S12), the process returns to step S03, and the processes after step S03 are repeated. When the simulation is to be ended (Yes in step S12), the processing of the system state management unit 30 is ended.

  FIG. 6 is a diagram illustrating an example of a procedure for executing a module configuration determination process. Here, the module configuration confirmation processing means that the profile table 116 in the master module 110 has its own module attribute information 1161a (ini file: see FIG. 4) in the profile table 116 in the slave module 110 managed by the master. Is a process of registering all or a part of.

  In the example of FIG. 6, the master is the system state management unit 30, and the slave is the customer load simulation unit 80 or the distributed power supply simulation unit 90. At this time, the own module attribute information 1161a (ini file) of the slave (the customer load simulation unit 80 or the distributed power supply simulation unit 90) is the module management information 1162b part (module) of the profile table 116b of the master (system state management unit 30). Management information storage unit 31: registered in FIGS. 4 and 2).

  In FIG. 6, the profile middle 115b is the profile middle 115 (see FIG. 3) of the master (system state management unit 30), and the profile middle 115a is the slave (customer load simulation unit 80 or distributed power supply simulation unit 90). ) Profile middle 115. The module application 111a is a module application 111 (see FIG. 3) of a slave (the customer load simulation unit 80 or the distributed power supply simulation unit 90).

  As shown in FIG. 6, in the module configuration determination process, first, the profile middle 115a of each of the customer load simulation unit 80 and the distributed power supply simulation unit 90 (hereinafter simply referred to as a slave) is an ini file of its own module 110. The module ID is acquired from the own module attribute information 1161a, and the module activation message with the acquired module ID attached is transmitted to the profile middle 115b of the system state management unit 30 (hereinafter simply referred to as the master) (step S21). ).

  Next, when the master profile middle 115b receives the module ID, the received module ID is stored in the module management information 1162b of the master profile table 116 (see the module management information storage unit 31, see FIGS. 2 and 4). It is determined whether it is registered (step S22). As a result of the determination, if the received module ID is registered in the module management information 1162b (Yes in step S22), the master profile middle 115b transmits an activation response message to the slave profile middle 115a. (Step S30), and the module configuration determination process is terminated.

  On the other hand, if the received module ID is not registered in the module management information 1162b as a result of the determination in step S22 (No in step S22), the master profile middle 115b provisionally stores the data of the essential profile item. The ad hoc response message created and attached with the data of the essential profile item is transmitted to the profile middle 115a of the slave (step S23). The essential profile item means an essential item among items to be registered in the module management information 1162b.

  When the slave profile middle 115a receives the ad hoc response message, the profile intermediate data 1151a among the provisional essential profile item data included in the received ad hoc response message is provisional. The essential essential profile item data is updated with the set data (step S24).

  Next, the slave profile middle 115a determines whether or not there is profile item data not set in the own module attribute information 1161a (step S25). If there is unset profile item data as a result of the determination in step S25 (Yes in step S25), the slave profile middle 115a performs the processing of the on-demand profile input sequence in the portion surrounded by the broken line. Execute (Step S26 and Step S27).

  In the on-demand profile input sequence process, the slave profile middle 115a issues a dialog event to the module application 111a (step S26). When the module application 111a accepts the issuance of the dialog event, the module application 111a accepts data input of an unset profile item performed by an operator or the like (step S27), and issues an ini file update function to the slave profile middle 115a. The profile middle 115a processes the ini file update function to update the ini file (own module attribute information 1161a).

  FIG. 7 is a diagram showing an example of a profile item data input acceptance screen. The operator can input necessary profile item data via an input reception screen as shown in FIG.

  On the other hand, if there is no unset profile item data in the determination in step S25 in FIG. 6 (No in step S25), the slave profile middle 115a omits the execution of the on-demand profile input sequence process. Then, a profile update message with the updated ini file (own module attribute information 1161a) attached is transmitted to the master profile middle 115b (step S28).

  When receiving the profile update message with the ini file attached, the master profile middle 115b confirms that the attached ini file (own module attribute information 1161a) has no shortage of required profile items, and stores the ini file. Registration in the module management information storage unit 31 (step S29). Then, the master profile middle 115b transmits an activation response message to the slave profile middle 115a (step S30), and ends the module configuration determination process.

  As described above, the module configuration confirmation process shown in FIG. 6 is performed with all the slaves that transmitted the module activation message. When the master is the system state management unit 30, the slaves are the customer load simulation unit 80 and the distributed power supply simulation unit 90. Therefore, the system state management unit 30 does this module before performing the power flow simulation of the distribution system. By executing the configuration determination process, it becomes easy to determine the customer load simulation unit 80 and the distributed power supply simulation unit 90 to be simulated.

  Furthermore, the slave ini file (own module attribute information 1161a) newly added in the module configuration determination process shown in FIG. 6, that is, the ad middle start message transmission by the profile middle 115b (step S23) and subsequent steps S29 Thus, the slave ini file (own module attribute information 1161a) registered in the module management information storage unit 31 is preferably deleted each time a series of power flow simulations of the distribution system is completed.

  When there is an unregistered slave (the customer load simulation unit 80 or the distributed power supply simulation unit 90) in the module management information storage unit 31 during the module configuration determination process, the system state management unit 30 determines the ini of the slave. Since the file (own module attribute information 1161a) is registered in the module management information storage unit 31, the customer load simulation unit 80 or the distributed power supply simulation unit 90 corresponding to the new or temporary customer 7 or 7a, It becomes easy to make it a simulation object ad hoc.

  As described above, according to the embodiment of the present invention, it is possible to easily perform the power flow simulation of the distribution system in which the load devices 72 and the distributed power sources 73 of the consumers 7 and 7a to be simulated are individually considered. Become.

<Modification 1 of Embodiment>
FIG. 8 is a diagram showing another example of the procedure for executing the module configuration determination process in FIG. As shown in FIG. 8, the module configuration determination process is different from FIG. 5 in step S27 ′ in the ad hoc profile input sequence. Hereinafter, the different parts will be described.

  In FIG. 8, in the processing of the ad hoc profile input sequence, the slave profile middle 115a issues a dialog event to the module application 111a 'as in FIG. 5 (step S26). When the module application 111a ′ accepts the issuance of the dialog event, the module application 111a ′ reads the ad hoc ini file 1111 in which the ad hoc profile items are recorded, acquires unset profile items (step S27 ′), and the slave profile middle An ini file update function is issued to 115a. Subsequently, the profile middle 115a processes the ini file update function to update the ini file (own module attribute information 1161a).

  In the case of the first modification, the operator does not need to perform an input operation, thereby reducing the operator's work load.

<Modification 2 of Embodiment>
FIG. 9 is a diagram showing another example of the execution procedure of the power distribution system simulation in the power distribution system power flow simulation device according to the embodiment of the present invention. The difference between the execution procedure of FIG. 9 and FIG. 5 is that the system state management unit 30 returns to step S02 ′ when the simulation is not terminated (No in step S12 ′) in the determination of step S12 ′ (note that FIG. 5, the process returns to step S03), and the process after step S02 ′ is repeatedly executed.

  In this case, when the system state management unit 30 receives a new module activation message from each of the customer load simulation unit 80 and the distributed power supply simulation unit 90 after executing the previous step S02 ′, the system state management unit 30 receives the module activation message. Based on the module activation message, the module configuration to be simulated can be added and confirmed (step S02 ′).

  Therefore, in the second modification, the module configuration can be appropriately updated even during the simulation.

<Other variations>
In addition, some or all of the customer load simulation unit 80 and the distributed power supply simulation unit 90 in the distribution system power flow simulation device 100 according to the embodiment of the present invention are installed in the actual customers 7 and 7a shown in FIG. The wattmeter 71 may be replaced. In this case, it is assumed that the wattmeter 71 has a predetermined communication function and can communicate with the system state management unit.

  In this case, since the actual load of the customers 7 and 7a and the amount of power generated can be used, a more realistic distribution system power flow simulation can be performed.

<Second Embodiment>
FIG. 10 is a diagram illustrating an example of a functional block configuration of a distribution system power flow simulation device according to the second embodiment of the present invention. As shown in FIG. 10, a distribution system power flow simulation device 100A according to the second embodiment of the present invention includes a power distribution system power flow calculation unit 10, a power flow calculation interconnection unit 20, a system state management unit 30 ′, and a network communication unit 40. Is connected to a consumer power simulation unit 1002 having at least one customer load simulation unit 80 and a distributed power supply simulation unit 90 via a communication network 1003 such as the Internet. Composed.

  The execution procedure of the distribution system power flow simulation and the execution procedure of the module configuration confirmation process described with reference to FIGS. 3 to 9 are similarly applied to the distribution system power flow simulation device 100A in the present embodiment.

  In the second embodiment, the power distribution system power flow simulation device 100A is considered in terms of hardware as being divided into a simulation server device 1001 and a customer power simulation unit 1002. The consumer power simulation unit 1002 can be configured on a computer at hand of the user. In this case, the user can easily set the configuration of the consumer power simulation unit 1002 freely according to his / her needs on the computer at hand.

  Here, at least one of the customer load simulation unit 80 and the distributed power supply simulation unit 90 included in the customer power simulation unit 1002 is a load power and a distributed power source used by the load device 72 included in the consumers 7 and 7a. The measured value of the wattmeter 71 that measures at least one of the generated power generated by the 73 may be read, and the read measured value (power) may be supplied to the system state management unit 30.

  In the second embodiment, the system state management unit 30 ′ includes a fee calculation unit 32. The charge calculation unit 32 aggregates the processing time in the power flow calculation interconnection unit 20 and the system state management unit 30 ′ required for the distribution system power flow simulation obtained by the user, the processing time, the number of simulations, and the user Calculates the usage charge for the distribution system power flow simulation based on the number of the customer load simulation unit 80 and the distributed power supply simulation unit 90 used by the customer power simulation unit 1002.

  Therefore, in the distribution system power flow simulation device 100A according to the second embodiment, it is possible to charge the usage fee to the user of the power distribution system power flow simulation. In addition, in 1st Embodiment, although it does not explain providing the charge calculation part 32 in the system state management part 30, the system state management part 30 also has the charge calculation part 32 also in 1st Embodiment. It doesn't matter.

<Other supplements>
As described above, the system state management unit 30 according to the embodiment of the present invention has a function suitable for operating in cooperation with the distribution system power flow calculation unit, but besides the power distribution system power flow calculation, It can also be applied to a distribution system state estimation system that estimates the overall state of a system from incomplete measurement data and a measurement data monitoring system.

1 Substation 2 Distribution Line 3 Switch 4 SVR
5 pole transformer 6 service line (branch branch line)
7, 7a Customer 10 Distribution system power flow calculation unit 20 Power flow calculation cooperation unit 30, 30 'System state management unit 31 Module management information storage unit 32 Charge calculation unit 40, 40' Network communication unit 71 Power meter 72 Load device 73 Distributed power supply 80 Customer load simulation unit 90 Distributed power supply simulation unit 100, 100A Distribution system power flow simulation device 110 Module 111, 111a Module application 112 Input / output middle 113 Input data processing unit 114 Output data processing unit 115, 115a, 115b Profile middle 116, 116a , 116b Profile table 201 Total load power 1001 Simulation server device 1002 Customer power simulation device 1003 Communication network 1161, 1161a, 1161b Own module attribute information 1162a Simulation information 1162b Module management information

Claims (15)

A distribution system power flow simulation device for simulating the power flow in a power distribution system from a substation to a customer load via a pole transformer,
Using load power in the pole transformer, a distribution system power flow calculation unit that calculates a power flow in a distribution system portion from the substation to the pole transformer,
A plurality of customer load simulation units for individually simulating time fluctuations of load power respectively used by a plurality of consumers;
A plurality of distributed power supply simulation units for individually simulating time fluctuations of the generated power generated by each of the plurality of distributed power supplies;
From each of the plurality of customer load simulation units and the plurality of distributed power source simulation units, load power or generated power at a specified time is acquired, and the acquired power is used to be deployed in the distribution system. The load power in each of the plurality of pole transformers is calculated, and the calculated load power in the pole transformer is input to the power distribution system power flow calculation unit to cause the power distribution system power flow calculation unit to execute power flow calculation A system state management unit;
A distribution system power flow simulation device characterized by comprising: The system state management unit
A module management information storage unit for storing module management information for managing the customer load simulation unit and the distributed power supply simulation unit to be a target of power flow simulation in the distribution system as a module of the power flow simulation target; In addition,
The system state management unit
Before starting the power distribution flow simulation, a module ID for individually identifying the module and a module type ID for identifying the type of the module from each of the consumer load simulation unit and the distributed power supply simulation unit, A branch branch ID for identifying a branch branch branched from the pole transformer in the distribution system to which a customer load or a distributed power source simulated by the module is connected, and
The information including at least the acquired module ID, module type ID, and branch branch line ID is registered in the module management information storage unit as module management information about the module. The distribution system power flow simulation device described. The system state management unit further includes:
When starting a power flow simulation in the distribution system, the module ID is acquired from each of the modules targeted for power flow simulation, and whether or not the acquired module ID is registered in the module management information storage unit. Judgment,
As a result of the determination, if the module ID is not registered in the module management information storage unit, a module ID, a module type ID, and a branch branch ID for the module are obtained from the module having the module ID. Get the
The information including at least the acquired module ID, module type ID, and branch branch line ID is registered in the module management information storage unit as module management information about the module. The distribution system power flow simulation device described. At least one of the plurality of customer load simulation units and the plurality of distributed power supply simulation units is:
Read a measured value of a wattmeter that measures at least one of the load power used by the consumer and the generated power generated by the distributed power source of the consumer, and the measured value of the read wattmeter is read into the system state management unit The distribution system power flow simulation device according to claim 1, wherein the power distribution flow simulation device is supplied. The system state management unit further includes:
Processing time of the power flow simulation in at least one of the distribution system power flow calculation unit and the system state management unit, and the number of the customer load simulation unit and the distributed power supply simulation unit used for the power flow simulation, The distribution system power flow simulation device according to claim 1, further comprising a fee calculation unit that calculates a simulation fee based on the included information. A power distribution system flow simulation method for simulating by computer a power flow in a power distribution system from a substation to a customer load via a pole transformer,
The computer
Using load power in the pole transformer, a distribution system power flow calculation unit that calculates a power flow in a distribution system portion from the substation to the pole transformer,
A plurality of customer load simulation units for individually simulating time fluctuations of load power respectively used by a plurality of consumers;
A plurality of distributed power supply simulation units for individually simulating time fluctuations of the generated power generated by each of the plurality of distributed power supplies;
A system state management unit for managing power flow calculation by the power distribution system power flow calculation unit;
With
The computer
As processing in the system state management unit,
A process of supplying time information to each of the plurality of customer load simulation units and the plurality of distributed power supply simulation units, and outputting load power or generated power at that time,
A process of acquiring the load power or the generated power output from each of the plurality of consumer load simulation units and the plurality of distributed power supply simulation units;
Using the acquired load power and the generated power, a process of calculating load power in each of the plurality of pole transformers arranged in the distribution system;
The load power in each of the calculated pole transformers is input to the distribution system power flow calculation unit, and the power distribution system power flow calculation unit performs a power flow calculation;
A distribution system power flow simulation method characterized in that The computer
A module management information storage unit for storing module management information for managing the customer load simulation unit and the distributed power supply simulation unit to be a target of power flow simulation in the distribution system as a module of the power flow simulation target; In addition,
The computer
As processing in the system state management unit,
Before starting the power distribution flow simulation, a module ID for individually identifying the module and a module type ID for identifying the type of the module from each of the consumer load simulation unit and the distributed power supply simulation unit, A branch branch ID for identifying a branch branch branched from the pole transformer in the distribution system to which a customer load or a distributed power source simulated by the module is connected; and
Processing for registering information including at least the acquired module ID, module type ID, and branch branch line ID in the module management information storage unit as module management information for the module;
The distribution system power flow simulation method according to claim 6, further comprising: The computer
As processing in the system state management unit,
When starting a power flow simulation in the distribution system, the module ID is acquired from each of the modules targeted for power flow simulation, and whether or not the acquired module ID is registered in the module management information storage unit. A process of determining,
As a result of the determination, if the module ID is not registered in the module management information storage unit, a module ID, a module type ID, and a branch branch ID for the module are obtained from the module having the module ID. Process to get the
Processing for registering information including at least the acquired module ID, module type ID, and branch branch line ID in the module management information storage unit as module management information for the module;
The distribution system power flow simulation method according to claim 7, further comprising: A program for simulating the power flow in a distribution system from a substation to a consumer load via a pole transformer,
In the computer,
Distribution power flow calculation processing for calculating power flow in a distribution system portion from the substation to the pole transformer using load power in the pole transformer,
A plurality of customer load simulation processes for individually simulating time fluctuations of load power used by a plurality of consumers,
A plurality of distributed power source simulation processes for individually simulating time fluctuations of the generated power generated by each of the plurality of distributed power sources;
System state management processing for managing power flow calculation in the power distribution system power flow calculation processing,
In addition,
In the system state management process,
A process of supplying time information to each of the plurality of consumer load simulation processes and the plurality of distributed power supply simulation processes, and outputting load power or generated power at that time;
A process of acquiring the load power or the generated power output from each of the plurality of consumer load simulation units and the plurality of distributed power supply simulation units;
Using the acquired load power and the generated power, a process of calculating load power in each of the plurality of pole transformers arranged in the distribution system;
A process of inputting load power in each of the calculated pole transformers to the distribution system power flow calculation unit;
A program for running The computer
A module management information storage unit for storing module management information for managing the customer load simulation process and the distributed power supply simulation process, which are targets of power flow simulation in the power distribution system, as modules of the power flow simulation target; In addition,
In the computer,
As a process in the system state management process,
Before starting the distribution power flow simulation, a module ID for individually identifying the module and a module type ID for identifying the type of the module from each of the consumer load simulation process and the distributed power supply simulation process, A branch branch ID for identifying a branch branch branched from the pole transformer in the distribution system to which a customer load or a distributed power source simulated by the module is connected; and
Processing for registering information including at least the acquired module ID, module type ID, and branch branch line ID in the module management information storage unit as module management information for the module;
10. The program according to claim 9, wherein the program is further executed. As a process in the system state management process to the computer,
When starting a power flow simulation in the distribution system, the module ID is acquired from each of the modules targeted for power flow simulation, and whether or not the acquired module ID is registered in the module management information storage unit. A process of determining,
As a result of the determination, if the module ID is not registered in the module management information storage unit, a module ID, a module type ID, and a branch branch ID for the module are obtained from the module having the module ID. Process to get the
Processing for registering information including at least the acquired module ID, module type ID, and branch branch line ID in the module management information storage unit as module management information for the module;
The program according to claim 10, further causing the program to be executed. A simulation server device that simulates power flow in a distribution system from a substation through a pole transformer to a customer load, and a customer power simulator device that provides customer information including customer load power to the server device; A customer power simulation device in a distribution system power flow simulation device comprising:
A distribution system power flow calculation unit that calculates a power flow in a distribution system part from the substation to the pole transformer using load power in the pole transformer, and a plurality of power distribution systems provided in the distribution system Calculating the load power in each of the pole transformers, inputting the calculated load power in the pole transformer to the distribution system power flow calculation unit, and causing the distribution system power flow calculation unit to execute power flow calculation For the simulation server device configured to include a management unit,
Provides information on at least one of load power and generated power at a specified time by simulating at least one of time fluctuation of load power used by consumers and time fluctuation of generated power generated by distributed power supplies A consumer power simulator. The consumer power simulator is
When providing at least one of the load power and generated power information to the simulation server device, a module ID for individually identifying the consumer power simulation device and a module type ID for identifying the type of the consumer power simulation device And a branch branch ID for identifying a branch branch branched from the pole transformer in the distribution system to which a customer load or a distributed power source simulated by the consumer power simulator is connected. The customer power simulation device according to claim 12, further provided. The consumer power simulation device further includes:
Before starting simulation, the module ID is provided to the simulation server device, and when a notification that the module ID is unregistered is received as a response, the simulation server device A module ID for individually identifying the consumer power simulation device, a module type ID for identifying the type of the consumer power simulation device, and a customer load or distributed power source simulated by the power simulation device. 14. The consumer power simulation device according to claim 13, wherein information including at least a branch branch ID for identifying a branch branch branched from the pole transformer in the distribution system is provided. At least one of the customer power simulation devices is
Read a measured value of a power meter that measures at least one of the load power used by the consumer and the generated power generated by the distributed power source used by the consumer, and the measured value of the read power meter is read into the simulation server device The consumer power simulation device according to claim 12, wherein the customer power simulation device is provided.

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