WO2014033892A1

WO2014033892A1 - Power interchange route creation method and power interchange route creation device

Info

Publication number: WO2014033892A1
Application number: PCT/JP2012/072095
Authority: WO
Inventors: 石田　隆張; 弘起佐藤; 民則冨田; 道樹中野; 靖子志賀
Original assignee: 株式会社日立製作所
Priority date: 2012-08-31
Filing date: 2012-08-31
Publication date: 2014-03-06
Also published as: JPWO2014033892A1

Abstract

When interchanging or transmitting and distributing power by a technology using each multi-terminal non-synchronous interconnection device described in a patent document (1), it is necessary to determine an interchanging route and the amount of power to be interchanged through a self-exciting power converter. In the above prior art, however, a rule in which the power transmission loss for the interchanging route is minimized is only described. In the future, since methods for interchanging and transmitting and distributing various forms of power or power using various power transmission and distribution devices and power distribution devices are expected, a method for determining a power interchange route using an index representing the effect of specific power interchange and transmission and distribution other than the power transmission loss and a device implementing the method are required. As indicated in the above part of the problem to be solved by the invention, first the present invention uses, as input data, connection information and facility database in a network used when interchanging power and characteristics not described in the patent document and representing the conversion efficiency of the self-exciting power converter in the multi-terminal non-synchronous interconnection device to calculate an interchange route through which a large number of self-exciting power converters in the multi-terminal non-synchronous interconnection devices installed in the entire target network are operated at the maximum efficiency (minimum self-exciting power converter loss) as a whole. Further, the expense for a power trade occurring during the interchange is also simultaneously calculated. Further, in addition to the minimization of the self-exciting power converter loss, power flow is optimally distributed so that a green-power index is maximized that becomes an index representing the use amount of power derived from renewable energy, and an interchange plan for maximizing the use of power derived from renewable energy and a control method are designed.

Description

Power accommodation route creation method and power accommodation route creation device

In order to enable large-scale introduction of renewable energy, the present invention divides the current power system into a plurality of independent power systems, and interconnects with each other via a self-excited converter to operate stably. It relates to the operation means.

There is JP 2011-061970 (Patent Document 1) as background art in this technical field. In Patent Document 1, in order to enable a large amount of renewable energy to be introduced, renewable energy and other power sources such as a power source / load and a power storage device are balanced in each power system so as to be independent. An efficient interconnection device is disclosed in which excess or deficiency is generated by connecting asynchronously with other power systems, including the main power system, to allow power to be interchanged. Further, a technology for constructing a power system including control of these power devices, an efficient and flexible control system for controlling the whole, a communication system as a communication base, and an optimal power interchange algorithm is disclosed.

JP 2011-061970

When attempting to allow power interchange or power distribution with the technology of Patent Document 1, it is necessary to determine the amount of power to be accommodated through the self-excited power converter and the route to be accommodated. However, Patent Document 1 only describes a criterion for minimizing power transmission loss with respect to a flexible route. In the future, since various forms, or various power distribution devices and power interchange methods and distribution methods using power distribution devices are conceivable, indicators that express the effects of specific power interchange and distribution other than transmission loss were used. There is a need for a method for determining a power interchange route and a device for realizing the method.

In the present invention, as described in the problem to be solved by the above-described invention, first, connection information in a network when accommodating power, a database of facilities, and a multi-terminal asynchronous connection not described in the patent literature. Using the characteristics indicating the conversion efficiency of the self-excited power converter in the system equipment as input data, the maximum efficiency of all the self-excited power converters in the multi-terminal asynchronous interconnected equipment installed in the entire target network ( Calculate the flexible route to operate with self-excited power converter loss minimum).

According to the present invention, it is possible to obtain a flexible route for efficiently operating a large number of self-excited power converters in a multi-terminal asynchronous interconnection device installed in the entire target network.

The block diagram which shows the 1st Example of this invention. An example of target system connection data and equipment database. An example of self-excited power converter conversion efficiency data. An example of the processing sequence of an accommodation route calculation apparatus. An example of the detail of a process in an accommodation route calculation apparatus. The flowchart which calculates | requires the combination case and the amount of accommodation in an accommodation route calculation apparatus. The accounting flowchart in an accommodation route calculation apparatus. The block diagram which shows the 2nd Example of this invention. An example of data derived from passing power of a self-excited power converter. An example of a method for obtaining power generation origin. An example of the result which calculated | required the influence range of the generator. The flowchart which calculates | requires the combination case and the amount of accommodation in an accommodation route calculation apparatus. Example of monitoring screen at center equipment

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

Fig. 1 shows a system configuration example of this embodiment. Center system (power interchange route creation device) 110, multi-terminal asynchronous interconnection device 120, 500-1, 500-2, 500-3, power transmission / distribution network 131, communication line 132,

loads

611, 613, 615,

distributed power supply

612 , 614, 616. The distributed power source here includes a storage battery. Moreover, since an electric vehicle can also be discharged in the form of V2G (Vehicle To Grid), it may be considered as a storage battery.

The center system 110 is a self-excited power converter that shows characteristics between the output and efficiency of different self-excited power converters used in the equipment database 111 related to systems in the target range and multi-terminal asynchronous interconnection equipment. Conversion efficiency data 112, target system connection data 113 indicating the connection state of the target power system, external communication I / F 114, interchange route calculation function 115, interchange route calculation that accumulates the results calculated by the interchange route calculation function 115 The system includes a database 116 and a billing system 117 that settles power transmission / reception costs when power is exchanged and distributed. Although the center system includes a CPU, a memory device, a storage device, and the like for performing computer processing, the present invention is not directly related to the present invention and is therefore omitted from the drawing.

The center system 110 is connected to each multi-terminal asynchronous interconnection device 500-1 to 500-3, 120 via the communication I / F 508-1 to 3 in each multi-terminal asynchronous interconnection device via the communication line 132. ing. Here, the multi-terminal asynchronous interconnection device controls the transmission and reception of power between each self-excited power converter by connecting multiple self-excited power converters via a DC bus in a method called Back To Back. This is a device having a power circuit that operates and an arithmetic module that controls the power circuit.

In addition, there are 131 power lines for supplying power from the external power source 100 and power lines for connecting each multi-terminal asynchronous interconnection device. These power lines are self-excited power converters 121-1 in each multi-terminal asynchronous interconnection device. .., 501-1 to 3, 502-1 to 3, and 503-1 to 3 are connected to each multi-terminal asynchronous interconnection device or an external power source. Based on a signal from the center system 110 via the communication I / F, a control program stored in a storage device not described in the figure is loaded into a memory (not shown) and the CPU By performing arithmetic processing, power is exchanged and distributed between multi-terminal asynchronous interconnection devices based on control commands from the center system. In the figure, 999 indicates a DC bus.

The contents of data used in this embodiment will be described with reference to FIG. Reference numeral 301 denotes data indicating facilities of power transmission lines and distribution lines stored in the facility database 111. An example of data consisting of at least the tap ratio when the transmission line, distribution line resistance, induction, capacity, transmission line, distribution line type is a transformer, or SVR (Step Voltage Regulator). It is. As additional information, an On / Off flag describing whether or not each facility is used may be provided.

302 is an example of data relating to the power generation equipment stored in the equipment database. The presence / absence of connection of the power generator, the specified voltage value, the initial voltage value, the active power output PG when the power generator is connected, and the power generator connected. The reactive power output QG in the case of being connected, the active power value PL of the load, the reactive power value QL of the load, and the SCShR that is a value when the capacitor and the reactor are connected are configured at least. Note that the initial voltage value here is an item used in the tidal current calculation that is executed when obtaining the power generation origin described later using this database, so this item may be deleted as necessary. Is possible.

303 is data indicating the upper and lower operational limits of each facility stored in the facility database. This example is an example showing an upper limit value and a lower limit value of active power for operation determined for each facility. Data corresponding to the target system connection data 113 is obtained by adding an On / Off flag indicating a connection state to the data of the above-described format 301.

The self-excited power converter conversion efficiency data 112 will be described with reference to FIG.

The multi-terminal asynchronous interconnection device 500 includes a communication I / F 508 and self-excited power converters 501 to 503. The equipment connected to each self-excited power converter is a self-excited type because it is a device with various ratings including, for example, photovoltaic power generation, storage batteries, gas turbines, general loads, and power loads often found in factories. The power converter is usually not a self-excited power converter having the same capacity but a self-excited power converter having a different capacity. Furthermore, the characteristic curves indicating the effective power output and efficiency of each self-excited power converter are generally greatly different as shown by 511 to 513. The self-excited power converter conversion efficiency database 112 stores data corresponding to the efficiency curves 511 to 513 shown here.

The processing of the flexible route calculation unit 115 will be described with reference to the sequence diagram of FIG. This sequence is executed based on the signal from the multi-terminal asynchronous interconnected device (power receiving side) to obtain the power interchange of the power transmitted to the accommodation route calculation unit at a fixed period (power receiving side) It is executed by any one of the methods in which execution is started by an event raised from the multi-terminal asynchronous interconnection device. In this embodiment, it is assumed that the sequence of FIG. 4 is periodically executed by the accommodation route calculation unit 115.

In the next control cycle in which the interchange route calculation unit receives the data including the desired power reception time, the desired power reception amount, and the desired power reception continuation time from the multi-terminal asynchronous interconnection device that calculates the power interchange described above (power reception side). First, in processing 402, a signal for obtaining necessary data is distributed from the flexible route calculation unit 115 to each multi-terminal asynchronous interconnection device 500 via a communication line. The requested data includes at least the On / Off information 301 shown in FIG. 2, the data shown in 302, and at least whether or not there is excess or deficiency of power (power supply / demand status) below each multi-terminal asynchronous interconnection device. To do. A data response from each multi-terminal asynchronous interconnection device 500 is sent to the accommodation route calculation unit 115 in processing 403. The interchange route calculation unit 115 determines whether or not it is necessary to interchange power between the multi-terminal asynchronous interconnection devices 500 in processing 405. In this determination, the value of the presence or absence of excess or deficiency of power returned from each of the multi-terminal asynchronous interconnection devices 500 exceeds a predetermined threshold value (for example, 2% of the required power amount), and the multi-terminal When the storage battery storing the necessary power is not connected to the asynchronous interconnection device, the accommodation route calculation unit 115 determines that the electricity accommodation is necessary. If no power interchange is required in the process 405, the process ends as it is, and this process enters a sleep state until the next activation time or an event that triggers activation occurs. When it is determined in process 405 that power accommodation is necessary, the accommodation route calculation unit 115 relates to the storage capacity or power generation capacity of each multi-terminal asynchronous interconnection device 500 in process 406. Request data. After the interchange route calculation unit 115 acquires data relating to the power generation surplus required from each multi-terminal asynchronous interconnection device 500 in the process 407, the interchange pattern calculation unit in the process 408 uses the power interchange source and its amount, and the power Determine the route to accommodate. This specific process will be described later with reference to FIG. Based on this determination, the control signal necessary for accommodation is reserved in processing 409 by the next control cycle. The reservation of control progress here refers to self-excited power converters 501 to 503 or 121-1 to 121, which are constituent devices, with respect to the multi-terminal asynchronous interconnection device 500 in order to transmit and receive desired accommodation power. -4 is distributed. The specific control signal here relates to, for example, the phase of the current flowing through each self-excited power converter or the voltage of the common bus of each self-excited power converter. Information related to execution time is given to this control signal (for example, control execution immediately, control execution at a specific time, and effective duration, etc.) are distributed to each multi-terminal asynchronous interconnection device 500, and the signal After the flexible route calculation unit 115 confirms that each multi-terminal asynchronous interconnection device 500 has received the processing time in step 410, each multi-terminal asynchronous interconnection device 500 becomes flexible in step 411 when the above-described execution time is reached. Execute control. In process 412, a signal is transmitted from each multi-terminal asynchronous interconnection device 500 to the accommodation route calculation unit that the control can be normally executed during control execution, and in process 413, the signal transmitted in process 412 is sent to the accommodation route. The information received by the calculation unit is returned to each multi-terminal asynchronous interconnection device. In the process 414, if it is within the effective continuation time described above and it is time to continue the accommodation, the process returns to the process 411 to continue the accommodation. If it is time for the accommodation to end, the process ends. In the above description, the case where it is executed based on the signal from the multi-terminal asynchronous interconnection device for obtaining the accommodation of the power transmitted to the accommodation route calculation unit (power receiving side), the opposite case, that is, Even in the case of requesting power interchange when the power is in a surplus state (on the power transmission side), it can be executed by reversing the power transmission and power reception in the above description.

Referring to FIG. 5, a method for determining a power interchange source and its amount, and a route for accommodating power in the accommodation pattern calculation unit will be described. FIG. 5 assumes a power system in which five multi-terminal asynchronous interconnection devices 601 to 605 are interconnected, and each multi-terminal asynchronous interconnection device has a

load

611, 613, 615, 617, 619 and a distributed power source. (Including storage battery) 612, 614, 616, 618, 620 is assumed to be connected. In this case, it is assumed that the load power for charging the EV is procured from the distributed power source under the other multi-terminal asynchronous interconnection device 604 among the loads connected to the multi-terminal asynchronous interconnection device 604. In this case, an example in which power is accommodated from the multi-terminal

asynchronous interconnection devices

601 and 602, 603, and 605 connected to the backbone system will be described. First, a candidate for an interchange route for transmitting power to the multi-terminal asynchronous interconnection device 604 from 601, 602, 603, 605 is obtained. The method for obtaining the accommodation route here will be described with reference to FIG. 5. The candidates for the accommodation route in this example are the multi-terminal

asynchronous interconnection devices

601, 602, 603, and 605 and the direct multi-terminal asynchronous interconnection device 604. Convergence route to be connected, power from multi-terminal asynchronous interconnection device 601 once aggregated to any of multi-terminal

asynchronous interconnection device

602, 603, 605 and then exchange to multi-terminal asynchronous interconnection device 604, multi-terminal asynchronous The power from the interconnecting device 602 is once integrated into one of the multi-terminal

asynchronous interconnecting devices

601, 603, 605 and then routed to the multi-terminal asynchronous interconnecting device 604, and the power from the multi-terminal asynchronous interconnecting device 603 is used. From the multi-terminal asynchronous interconnection device 605, a route that is once integrated into the multi-terminal

asynchronous interconnection device

601, 602, 605 and then accommodated to the multi-terminal asynchronous interconnection device 604. Once the power is aggregated to one of the multi-terminal

asynchronous interconnection devices

601, 602, 603, the route for accommodating the multi-terminal asynchronous interconnection device 604, the power from the multi-terminal

asynchronous interconnection devices

601 and 602 is once multi-terminal asynchronous. From the plurality of distributed power sources that can be accommodated such as a route to be accommodated in the multi-terminal asynchronous interconnection device 604 after being aggregated to any of the

interconnection devices

603 and 605, candidates for an accommodation route are obtained. The data is stored in the temporary storage device of the accommodation route calculation device or stored in the calculation database 116 for the accommodation route.

Next, an optimal accommodation route is obtained from these accommodation route candidates. In the system in which the multi-terminal asynchronous interconnection device is introduced in this way, the merit of accommodating power from a plurality of distributed power sources is that when passing through the self-excited power converter in the multi-terminal asynchronous interconnection device in FIG. It is to reduce the power loss as a whole. For example, when interchanged power is transmitted from one distributed power source in the state of full output of the self-excited power converter, the efficiency of the self-excited power converter decreases in the high power region as shown in FIG. Therefore, it is based on the idea that it is more advantageous to reduce power loss in a self-excited power converter by performing power interchange through a plurality of self-excited power converters using a self-excited power converter region that is as efficient as possible. The self-excited power converter that passes when the power is interchanged from the multi-terminal

asynchronous interconnection devices

602, 603, and 605 that answered that the power can be interchanged is blackened in the figure. Optimal combination so that the passing power of the self-excited power converters blacked to satisfy the required amount in 611 is operated in the region where the efficiency curve of each self-excited power converter shown in FIG. 3 is high. The problem is solved using an optimization method represented by quadratic programming. An example of the formulation is the following formula.

Or, when finding the optimal combination, identify all possible combinations and select the combination that maximizes the objective function of each combination, in this case, the overall efficiency of the self-excited power converter in the target flexible system. It is also possible to do it.

FIG. 6 is a flowchart showing the contents of the accommodation route calculation process 115 described with reference to FIG. First, in process 701, detection of a multi-terminal asynchronous interconnection device to which a load of a desired power source (power receiving side) is connected and the desired flexible power consumption are input.

Next, in processing 702, conversion efficiency data regarding the self-excited converter in the multi-terminal asynchronous interconnection device that passes through each interchange route candidate is read for each interchange route.

In process 703, a distributed power source that can be accommodated is detected based on the data from the multi-terminal asynchronous interconnection device acquired in process 407. Thereafter, the optimization calculation is performed in the processing 704 using the above-described formulation example, and the interchange route in which the loss in the self-excited power converter is minimized among the above-mentioned interchange route candidates, and each self-excited power conversion at that time Calculate the power value flowing through the container. Instead of the power value, the current value in each self-excited converter may be calculated. After obtaining the accommodation route and the power value to be supplied to each self-excited power converter, the power value is converted into a control command for accommodation at that power value. The conversion of the control command here may be a reference method based on a table showing a correlation between a control amount and a flexible power amount created in advance, or may be a method of solving a complicated control model each time. After the conversion is completed, the data is stored in the database 116, and the control value is transmitted to each multi-terminal asynchronous interconnection device before the control execution cycle. After the accommodation is completed, the accounting process is performed and the entire process is completed.

Referring to FIG. 7, an outline of the billing processing unit in the center system will be described based on a flowchart. In step 721, the location and the supply amount of the flexible supply source power transmitted to the multi-terminal asynchronous interconnection device of the flexible request source are acquired. This can be acquired from the data periodically transmitted from the multi-terminal asynchronous interconnection device to the center system in the process 412 of FIG. Next, after acquiring the breakdown information of the supply amount, in processing 722, the charging fee of the multi-terminal asynchronous interconnection device of the accommodation destination is calculated from the basic unit of each supply source, each supply amount, and the fee on the center system side To do. Next, in order to evaluate how much the loss in the self-excited power converter has an effect on the flexible electricity bill in process 723, the interchange between the distributed power source of the supplier and the load of the multi-terminal asynchronous interconnection device The power loss at the time of accommodation is calculated from the efficiency of the self-excited power converter in the route and the transmission line parameters between the multi-terminal asynchronous interconnection devices (FIG. 2, 301). Finally, in the process 724, the charging fee obtained above and the power loss generated at the time of accommodation are written in the database, and the process is terminated.

In addition, although the function of the accommodation route calculation part 115 was described in the above Example, this accommodation route calculation part 115 can also be used as one function of a feeding system, and is one of the computer applications of a feeding system. It can also be positioned.

As described above, according to the first embodiment of the power accommodation route creation method and the power accommodation route creation unit of the present invention, at least the conversion efficiency data of the self-excited power converter constituting the method and apparatus is input. In the interchange route calculation section for data, the load connected to one multi-terminal asynchronous interconnection device in the power system connected by multiple multi-terminal asynchronous interconnection devices to other multi-terminal asynchronous interconnection devices When accumulating power from the connected distributed power supply, it is possible to determine the amount of power to be accommodated with the power interchange route so that the efficiency of the self-excited power converter existing in the interchange route is maximized overall. It becomes.

Next, a second embodiment of the present invention will be described.

FIG. 8 shows a system configuration in the second embodiment. As shown in FIG. 8, a passing power derived database 118 of the self-excited power converter is added. This makes it possible to clarify the origin of renewable energy and fossil fuel derived from the power passing through the self-excited power converter, thereby reducing CO2 emissions in addition to the interchange loss in the self-excited power converter. There is an effect that becomes possible.

FIG. 9 shows an example of a self-excited power converter-derived power database. Reference numeral 304 in FIG. 9 shows an example in which power derived from fossil fuel, renewable energy, and other power sources is stored for each self-excited power converter. A method for calculating the derived power here will be described with reference to FIGS. 10 and 11.

Figure 10 shows the calculation flow. First, data is acquired from the database 751 as input data, and the data acquired in the process 752 is preprocessed. The contents of the database 751 here are the same data format as 301 and 302 shown in FIG. 2 and the contents of the equivalent data. Preprocessing for inputting this data into the computer program is performed in processing 752, and then power flow calculation generally performed in power analysis calculation is executed. After executing the tidal current calculation, the influence area of the generator is calculated in processing 754. In this method, the power flow is calculated based on the power flow from an arbitrary generator and the flow direction of the power flow from the result of the power flow calculation. Thereafter, in step 755, the contribution of each generator to the influence area (area shown in FIG. 11 as an example) of each generator divided in step 754 is obtained, the power generation origin for an arbitrary load is obtained, and the result Is stored in the database derived from the passing power of the self-excited power converter.

Alternatively, without using such an analytical method, power generation origin can be obtained by adding a signal as additional information to the power flowing through the system using a technology such as PLC (Power Line Communication), The result may be stored in the database derived from the passing power of the self-excited power converter. Alternatively, a method of calculating the passing current of the self-excited power converter by flowing a packet for recognizing the amount, direction, and quality of power flowing on a separately prepared communication line in synchronization with the power flowing in the system.

FIG. 12 is a flowchart showing the contents of the accommodation route calculation process 115 in the second embodiment. First, in process 701, the detection of the multi-terminal asynchronous interconnection device to which the load of the accommodation request source is connected and the desired accommodation power amount are input. Next, in process 702, conversion efficiency data regarding the self-excited power converter connected on the accommodation route candidate is read. In step 703, a distributed power source that can be accommodated is detected based on the data from the multi-terminal asynchronous interconnection device acquired in step 407. Thereafter, an optimization calculation is performed based on the formulation described later in processing 708, and the loss in the self-excited power converter and the power derived from renewable energy passing through the self-excited power converter at the time of interchange are minimized. The interchange route and the power value to be supplied to each self-excited power converter at that time are calculated.

An example of formulation in this case is as follows.

As described above, after obtaining the accommodation route and the power value to be sent to each self-excited power converter, the power value is converted into a control command for accommodation. The conversion of the control command here may be a reference method based on a table showing a correlation between a control amount and a flexible power amount created in advance, or may be a method of solving a complicated control model each time. After the conversion is completed, the data is stored in the database 116, and the control value is transmitted to each multi-terminal asynchronous interconnection device before the control execution cycle. After the accommodation is completed, the accounting process is performed and the entire process is completed. The accounting process is the same as in the first embodiment.

FIG. 13 shows an example of the power interchange in the center facility 110 and a monitoring screen at the time of power interchange. This screen is an example of displaying the power source, the amount and price of the interchanged power for each multi-terminal asynchronous interconnection device, and the self-excited power converter efficiency when the interchange is executed. In FIG. 13, regarding power origin, as in the case of the multi-terminal asynchronous interconnection device 601, the display shows three types of fossil fuel origin, renewable energy origin, and others, or 602 As in the multi-terminal asynchronous interconnection device, it is also possible to display the power origin for each multi-terminal asynchronous interconnection device of the interchange. With regard to the display of the accommodation power, FIG. 13 shows the amount of electricity and the price of the accommodation or accommodation. It is also possible to display details such as how much power is received from which multi-terminal asynchronous interconnection device by operating the screen. It is also possible to make a third party understand clearly the different unit power prices from the distributed power sources connected to each multi-terminal asynchronous interconnection device.

As described above, according to the second embodiment of the power accommodation route creation method and the power accommodation route creation unit of the present invention, at least the input data of the self-excited power converter conversion efficiency data constituting the method and apparatus is input data. Connect to other multi-terminal asynchronous interconnection devices in the load connected to one multi-terminal asynchronous interconnection device in the power system connected by multiple multi-terminal asynchronous interconnection devices When power is distributed from distributed power sources, the efficiency of the self-excited power converter existing in the interchange route is maximized as a whole, and the utilization ratio of power derived from renewable energy is maximized, for example. Thus, it is possible to determine the amount of power to be accommodated with the power interchange route.

100: Core power supply equipment, 110: Center equipment, 111: Equipment database, 112: Self-excited power converter conversion efficiency database, 113: Target system connection data, 114: External communication I / F, 115: Flexible route calculation unit, 116 : Interchange route calculation database, 117: billing processing unit, 120: multi-terminal asynchronous interconnection device, 121: self-excited power converter, 131: power line, 132: communication line, 125: communication line, 500: multi-terminal asynchronous interconnection Equipment, 501 to 503: self-excited power converter, 612, 614, 616: distributed power source, 611, 613, 615: load, 511-513: efficiency curve of self-excited power converter, 118: self-excited power converter Passing power derived data, 999: DC bus

Claims

A method for creating a power accommodation route in a system including an energy supply device, an energy consumption device, and a plurality of self-excited converters,
A step in which a connected device connected to a device that requires power transmits a power reception request amount to the route determination device;
The route determination device inquires all interconnected devices for information on accommodation;
A step in which the interconnection device returns information on accommodation to the route determination device;
Creating an accommodation route candidate;
A step of confirming the efficiency of the interconnection equipment related to the accommodation route candidate;
A method for creating a power accommodation route, comprising: a step of determining a route based on information on accommodation and information on efficiency of interconnected devices.
A method for creating a power accommodation route in a system including an energy supply device, an energy consumption device, and a plurality of self-excited converters,
Self-excited converters are connected in a radial manner via a DC bus, and have a plurality of multi-terminal type asynchronous interconnection devices that control power passing through the self-excited converter by controlling the self-excited converter. In a network system for accommodating power between asynchronous interconnection devices, a network using at least a DB consisting of conversion efficiency data of the self-excited converter constituting the multi-terminal asynchronous interconnection device, connection data of the target system, and equipment data A method for creating a power accommodation route, comprising: an arithmetic unit that calculates an accommodation route for operating the self-excited converter constituting the multi-terminal asynchronous interconnection device in the system with maximum efficiency.
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. In a network system having a plurality of terminals and accommodating power between multi-terminal type asynchronous interconnection devices, at least a DB comprising conversion efficiency data of a self-excited converter constituting the multi-terminal type asynchronous interconnection device, connection of the target system Characterized in that it has an arithmetic unit for calculating a flexible route for operating the self-excited converter constituting the multi-terminal asynchronous interconnection device in the network system with maximum efficiency by using data and facility data. Route creation device.
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. A center system controller for controlling a network system for accommodating power among multi-terminal type asynchronous interconnection devices, comprising the power interchange route creation device according to claim 3. .
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. In a network system having a plurality of terminals and accommodating power between multi-terminal type asynchronous interconnection devices, at least a DB comprising conversion efficiency data of a self-excited converter constituting the multi-terminal type asynchronous interconnection device, connection of the target system Data, equipment data, power generation from the self-excited converter, or the passing power derived database of the self-excited power converter that defines the multi-terminal asynchronous interconnection device of the interchange source. Arithmetic unit that calculates the flexible route for operating the self-excited converter that constitutes the terminal type asynchronous interconnection device in the form of maximum efficiency and maximum utilization of renewable energy And having a power interchange route preparation method.
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. In a network system having a plurality of terminals and accommodating power between multi-terminal type asynchronous interconnection devices, at least a DB comprising conversion efficiency data of a self-excited converter constituting the multi-terminal type asynchronous interconnection device, connection of the target system Data, equipment data, power generation from the self-excited converter, or the passing power derived database of the self-excited power converter that defines the multi-terminal asynchronous interconnection device of the interchange source. Arithmetic unit that calculates the flexible route for operating the self-excited converter that constitutes the terminal type asynchronous interconnection device in the form of maximum efficiency and maximum utilization of renewable energy And having a power interchange route creation device.
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. A center system controller for controlling a network system for accommodating power among multi-terminal type asynchronous interconnection devices, comprising the power accommodation route creation device according to claim 6. .
A multi-terminal type asynchronous interconnection device in which a plurality of self-excited converters for bi-directional power conversion are connected radially via a DC bus, and the power passing through the self-excited converter is controlled by controlling the self-excited converter. In a center system that controls a network system that accommodates power between multiple terminal type asynchronous interconnection devices, data relating to power origination and accommodation for the multiterminal type asynchronous interconnection device that passes when power is accommodated A monitoring and control device for a multi-terminal asynchronous interconnection device, characterized by displaying data relating to power prices and data relating to efficiency of a self-excited power converter in the multi-terminal asynchronous interconnection device.