KR101976093B1 - Flexible test platform for control and operation research of microgrid - Google Patents

Flexible test platform for control and operation research of microgrid Download PDF

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KR101976093B1
KR101976093B1 KR1020170091872A KR20170091872A KR101976093B1 KR 101976093 B1 KR101976093 B1 KR 101976093B1 KR 1020170091872 A KR1020170091872 A KR 1020170091872A KR 20170091872 A KR20170091872 A KR 20170091872A KR 101976093 B1 KR101976093 B1 KR 101976093B1
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distributed power
signal
converter
microgrid
based virtual
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KR1020170091872A
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KR20190009914A (en
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김학만
유형준
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인천대학교 산학협력단
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Priority to PCT/KR2018/004920 priority patent/WO2019017574A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

A flexible test platform for studying the control and operation of a microgrid according to an embodiment of the present invention includes an AC microgrid; DC microgrid; And an AC / DC coupled converter for coupling the AC microgrid and the DC microgrid, wherein the AC microgrid includes a plurality of inverter-based virtual AC distributed power sources, an AC line simulator connected to each of the virtual AC distributed power sources, An AC load simulation device coupled to the AC line simulator device and a first digital control platform for controlling operation of the respective virtual AC distributed power source, wherein the DC micro-grid includes a plurality of converter-based virtual DC dispersions A power supply, a DC line simulator connected to each of the virtual DC distributed power supplies, a DC load simulator connected to the DC line simulator, and a second digital control platform for controlling operation of each virtual DC distributed power source .

Figure R1020170091872

Description

[0001] FLEXIBLE TEST PLATFORM FOR CONTROL AND OPERATION [0002] RESEARCH OF MICROGRID [

The present invention relates to a flexible test platform for control and operational study of a microgrid capable of developing and testing microgrid control and operating systems.

The Micro Grid is a small-scale power system that is composed of various distributed power sources and loads such as solar power generation, wind power generation, cogeneration, and fuel cell, and can be operated in conjunction with or independent of the grid. Such a micro grid includes a power conversion device capable of power control, and studies on power control based on a power conversion device such as parallel operation of a plurality of distributed power sources, power control, improvement of power quality, and improvement of system stability are actively performed .

Hardware-in-the-loop simulation (HILS) was performed to verify the performance of the algorithm of the power converter developed through various studies in the same conditions and environments as the actual microgrid. Technique is being used.

KR 10-1023703 B1 KR 10-0934607 B1

[1] S. Parhizi, H. Lotfi, A. Khodaei, and S. Bahramirad, "State of the Art in Research on Microgrids: A Review," IEEE Access., Vol.3, pp. 890-925, [2] Y. Han, H. Li, P. Shen, E. A. A Coelho and J. M. Guerrero, "Review of Active and Reactive Power Sharing Strategies in Hierarchical Controlled Microgrids," IEEE Trans. on Power Electronics, Vol.32, No.3, pp.2427-2451, 2017. [3] A. S. Vijay, S. Doolla, and M. C. Chandorkar, "Real-Time Testing Approaches for Microgrids, IEEE Trans. On Power Electronics, [4] Y. Wang, X. Wang, Z. Chen, and F. Blaabjerg, "Distributed Optimal Control of Reactive Power and Voltage in Islanded Microgrids," IEEE Trans. on Industry Applications, Vol. 53, No. 1, pp. 340-349, 2017.

The present invention is directed to a micro grid control and operation algorithm using a plurality of inverter-based distributed power sources capable of output control by a digital control platform. It provides a flexible test platform for microgrid control and operational research that can be designed, developed and tested flexibly, quickly and reliably.

According to an aspect of the present invention, there is provided a flexible test platform for controlling and operating microgrid,

AC microgrid;

DC microgrid; And

And an AC / DC coupling converter for coupling the AC microgrid and the DC microgrid,

The AC microgrid includes a plurality of inverter-based virtual AC distributed power sources, an AC line simulator coupled to each of the virtual AC distributed power sources, an AC load simulator coupled to the AC line simulator, And a first digital control platform for controlling operation,

The DC microgrid includes a plurality of converter-based virtual DC distributed power sources, a DC line simulator coupled to each of the virtual DC dispersed sources, a DC load simulator coupled to the DC line simulator, And a second digital control platform for controlling operation.

A flexible test platform for studying control and operation of a microgrid according to an embodiment of the present invention is characterized in that the AC microgrid comprises a first AC power source for connecting the first digital control platform and each inverter- The DC microgrid may further include a first interface device, and the DC microgrid may further include a second interface device for coupling the second digital control platform and the respective converter-based virtual DC distributed power source.

In addition, according to an embodiment of the present invention, there is provided a flexible test platform for studying control and operation of a microgrid,

And converting the magnitude of the signal output from each of the inverter-based virtual AC distributed power sources into the magnitude of a signal that can be processed by the first digital control platform and providing the signal to the first digital control platform, A first signal magnitude converter for converting a magnitude of a signal to a magnitude of a signal that can be processed by the respective inverter based virtual AC distributed power sources and providing the magnitude of the signal to each inverter based virtual AC distributed power source; And

Converting the type of signal output from each inverter-based virtual AC distributed power source to a type of signal that can be processed in a first digital control platform and providing the converted signal to the first digital control platform; And a first signal type converter for converting a type of signal into a type of signal that can be processed in each inverter based virtual AC distributed power source and providing the type of signal to each inverter based virtual AC distributed power source,

Wherein the second interface device comprises:

And converting the magnitude of the signal output from each of the converter-based virtual DC dispersed power supplies into the magnitude of a signal that can be processed by the second digital control platform to provide the signal to the second digital control platform, A second signal size converter for converting a magnitude of a signal to be processed into a magnitude of a signal that can be processed in each converter-based virtual DC dispersed power source and providing the magnitude of the signal to each converter based virtual DC dispersion power source; And

Converting the type of signal output from each converter based virtual DC distributed power source to a type of signal that can be processed by the second digital control platform and providing the converted signal to the second digital control platform, Based virtual DC dispersed power source to convert the type of signal to be processed into a type of signal that can be processed in each converter-based virtual DC dispersed power source and provide the type of signal to each converter-based virtual DC dispersed power source.

In addition, the present invention provides a flexible test platform for microgrid control and operation research according to an embodiment of the present invention, wherein the first digital control platform includes: an AC voltage, an AC current, And based on the DC link voltage, controlling the operation of each inverter-based virtual AC distributed power supply,

The second digital control platform is capable of controlling the operation of each converter-based virtual DC distributed power supply based on the DC voltage, DC current, and DC link voltage of the respective converter-based virtual DC distributed power source .

In addition, in a flexible test platform for control and operation study of a micro grid according to an embodiment of the present invention, each inverter-based AC distributed power source includes an AC-AC back to back (BTB) inverter and,

Each of the converter-based DC-distributed power supplies may include an AC-DC back-to-back (BTB) converter.

In addition, in a flexible test platform for studying control and operation of a micro grid according to an embodiment of the present invention, the AC microgrid may include an output of each inverter-based virtual AC distributed power source to the AC line simulator Further comprising a plurality of first switches for connecting or disconnecting,

The DC micro-grid may further include a plurality of second switches for connecting or disconnecting each of the converter-based virtual DC distributed power supplies to the DC line simulation apparatus.

In addition, a flexible test platform for studying control and operation of a micro grid according to an embodiment of the present invention includes a third digital control platform for controlling the operation of the AC / DC coupling converter; And a third interface device for coupling the third digital control platform and the AC / DC coupling converter.

According to a flexible test platform for controlling and operating a micro grid according to an embodiment of the present invention, a micro grid control and operation algorithm can be applied using a plurality of virtual distributed power sources that can be controlled by a digital control platform Which allows the design, development and testing of microgrid system control and operation algorithms to be done flexibly, quickly and reliably.

In addition, the flexible test platform for controlling and operating the micro grid according to an embodiment of the present invention is capable of controlling actual converters using a digital control platform, and can be used in various converter applications and in the AC / DC micro- Control algorithms can be designed and verified.

Further, according to the flexible test platform for studying the control and operation of the micro grid according to the embodiment of the present invention, it is possible to flexibly change the structure of the system and to develop and test control algorithms of various converter systems.

In addition, according to the flexible test platform for studying the control and operation of the micro grid according to the embodiment of the present invention, since a single or a plurality of actual converters can be connected flexibly and various real converters can be directly controlled, It is possible to rapidly develop and test a control algorithm applicable to the application field of the conversion apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a flexible test platform for studying control and operation of a microgrid according to an embodiment of the present invention.
FIGS. 2A and 2B are diagrams for explaining the first and second interface devices shown in FIG. 1;
3 is a diagram for explaining the operation of a digital control platform and an inverter or a converter;
4 is a circuit diagram of an AC line simulator.
5 is a circuit diagram of an AC load simulation apparatus.
6 illustrates a flexible test platform for studying control and operation of a microgrid in accordance with an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention Should be construed in accordance with the principles and the meanings and concepts consistent with the technical idea of the present invention.

It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings.

Also, the terms "first", "second", "one side", "other side", etc. are used to distinguish one element from another, It is not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of known arts which may unnecessarily obscure the gist of the present invention will be omitted.

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

MATLAB / SIMULINK is widely used in the development of controllers for various power conversion devices and is being used for faster and more accurate controller development.

In a flexible test platform for controlling and operating microgrid according to an embodiment of the present invention, a small microgrid using virtual distributed power supply, load simulator, and line simulator based on actual converter is constructed, In order to construct the environment and maximize the speed and accuracy of the control design, the controller of each converter was OP4510 of OPAL-RT, a digital control platform based on MATLAB / SIMULINK.

A flexible test platform for studying the control and operation of a microgrid according to an embodiment of the present invention shown in FIG. 1 includes an AC microgrid 100, a DC microgrid 102, and the AC microgrid 100 And an AC / DC coupling converter 104 for coupling the DC micro-grid 102.

The AC microgrid 100 includes a virtual AC distributed power source 108 that includes three inverter based virtual AC distributed power sources VDER1, VDER2, and VDER3, a respective one of the virtual AC distributed power sources VDER1, VDER2, and VDER3, , An AC load simulator (106) connected to the AC line simulator (106), an AC load simulator (112) connected to the AC line simulator (106), and a controller for controlling the operation of each of the virtual AC distributed power sources (VDER1, VDER2, VDER3) 1 digital control platform 110. In one embodiment of the present invention, the virtual AC distributed power supply 108 includes three inverter-based virtual AC distributed power sources (VDER1, VDER2, VDER3), but the present invention is not so limited and may include fewer or more Based virtual AC distributed power supply of the inverter.

The DC microgrid 102 includes a virtual DC distributed power supply 116 that includes three converter based virtual DC distributed power sources VDER4, VDER5, and VDER6, a respective one of the virtual DC distributed power sources VDER4, VDER5, A DC load simulator 120 connected to the DC line simulator 114 and a control unit 120 for controlling the operation of each of the virtual DC distributed power sources VDER4, VDER5, and VDER6, 2 digital control platform 118. In one embodiment of the present invention, the virtual DC distributed power supply 116 includes three converter-based virtual DC distributed power sources (VDER4, VDER5, VDER6), although the present invention is not so limited and may include fewer or more Lt; / RTI > converter based virtual DC distributed power supply.

The AC microgrid 100 further includes a first interface unit 109 for connecting the first digital control platform 110 to the respective inverter-based virtual AC distributed power sources VDER1, VDER2, and VDER3 And the DC microgrid 102 includes a second interface device 117 for coupling the second digital control platform 118 and the respective converter based virtual DC distributed power sources VDER4, VDER5, and VDER6, ).

The AC microgrid 100 also provides the output of each of the inverter based virtual AC distributed power sources VDERl to VDER3, 308 and 310, 312 and 314, 316 and 318 to the AC line simulator 106, 302 Further comprising three first switches (320, 322, 324) for connecting or disconnecting the DC micro-grid (102) to the DC micro grid (102) And a plurality of second switches (not shown) for connecting to or disconnecting from the DC line simulator 114.

A third switch 326 is provided between the AC load simulator 306 and the AC line simulator 302 for connecting or disconnecting the AC load simulator 306 and the AC line simulator 302 .

A fourth switch (not shown) is provided between the DC load simulator 120 and the DC line simulator 114 for connecting or disconnecting the DC load simulator 120 and the DC line simulator 114 Respectively.

In addition, a flexible test platform for studying control and operation of a micro grid according to an embodiment of the present invention includes a third digital control platform 124 for controlling the operation of the AC / DC coupling converter 104, 3 digital control platform 124 and a third interface device 122 for coupling the AC / DC linkage converter 104. [

1 and 2A, the first interface unit 109 divides the magnitude of the signal output from the inverter-based virtual AC distributed power sources VDER1, VDER2, and VDER3 by the first digital control Converts the magnitude of the signal output from the first digital control platform 109 into a signal magnitude that can be processed by the platform 109 and provides the signal magnitude to the first digital control platform 109, A first signal magnitude converter 200 for converting the signal magnitude into signal magnitudes that can be processed by the power sources VDER1, VDER2, and VDER3 and providing them to the respective inverter-based virtual AC distributed power sources VDER1, VDER2, VDER3, and 204, Converts the types of signals output from the inverter-based virtual AC distributed power sources (VDER1, VDER2, and VDER3) into types of signals that can be processed by the first digital control platform 109 and outputs the signals to the first digital control platform 109 Provide, And converts the type of the signal output from the first digital control platform 109 into a type of signal that can be processed in the respective inverter-based virtual AC distributed power sources (VDER1, VDER2, VDER3) To a distributed power source (VDER1, VDER2, VDER3).

Referring to FIG. 1 and FIG. 2B, the second interface device 117 converts the size of a signal output from each of the converter-based virtual DC distributed power supplies (VDER4, VDER5, and VDER6) 118 to the second digital control platform 118 and provides a signal size output from the second digital control platform 118 to each of the converter based virtual DC dispersion power supplies (VDER4, VDER5, and VDER6) of the respective converters based on the signal size of each of the converter-based VDD4, VDER4, VDER5, and VDER6, Converts the type of the signal output from the virtual DC distributed power source (VDER4, VDER5, VDER6) of the second digital control platform 118 into a signal type that can be processed by the second digital control platform 118 and provides the converted signal type to the second digital control platform 118 Second Based virtual DC distributed power sources (VDER4, VDER5, and VDER6) to convert the types of signals output from the digital control platform 118 into signal types that can be processed by the respective converter-based virtual DC distributed power sources , VDER5, VDER6).

As shown in FIGS. 1 to 3, the first digital control platform 110 and 300 includes an AC voltage of the inverter-based virtual AC distributed power sources VDER1, VDER2, and VDER3, an AC current, And controls the operation of each of the inverter-based virtual AC distributed power sources (VDER1, VDER2, VDER3) based on the voltage.

Based on the DC voltage, DC current, and DC link voltage of each of the converter-based virtual DC distributed power sources (VDER4, VDER5, VDER6), the second digital control platform (118) DC distributed power supplies (VDER4, VDER5, VDER6).

Wherein each inverter based virtual AC distributed power source (VDER1, VDER2, VDER3) comprises AC-AC back to back (BTB) inverters (308 and 310, 312 and 314, 316 and 318) The converter-based virtual DC distributed power supplies (VDER4, VDER5, VDER6) include an AC-DC back to back (BTB) converter (not shown).

The first digital control platform 110 controls the operation of each of the inverter-based virtual AC distributed power sources VDER1, VDER2, and VDER3 so that each of the inverter-based virtual AC distributed power sources VDER1, VDER2, And operates with a virtual AC distributed power source.

The second digital control platform 118 also controls the operation of each of the converter-based virtual DC distributed power sources VDER4, VDER5, and VDER6 to control the respective converter-based virtual DC distributed power sources VDER4, VDER5, VDER6 ) Operate as a virtual DC distributed power supply.

In Fig. 1, T1 to T14 denote transformers, and numeral 130 denotes a static transfer switch (STS).

The AC / DC coupling converter 104 includes a grid connection switch 126 and an AC / DC converter 128.

In FIG. 3, reference numeral 300 denotes a digital control platform, reference numeral 302 denotes a line simulator, reference numeral 304 denotes an inverter-based virtual AC distributed power source, and reference numeral 306 denotes an AC load simulator.

Reference numerals 308 and 312, 312 and 314, and reference numerals 316 and 318 denote a back-to-back inverter.

Reference numerals 308, 312, and 316 denote inverters for converting AC to DC, and reference numerals 310, 314, and 318 denote converters for converting DC to AC.

The first digital control platform 110 senses the AC voltage, the AC current, and the DC link voltage from the respective inverter-based virtual AC distributed power sources VDER1, VDER2, and VDER3, and outputs the pulse width modulation signals PWM1, PWM2, and PWM3.

The second digital control platform 118 senses the DC voltage, the DC current, and the DC link voltage from the respective converter-based virtual DC distributed power sources (VDER4, VDER5, VDER6), and outputs the pulse width modulated signals PWM4, PWM5, and PWM6.

The AC line simulator 106 and the DC line simulator 114 are composed of resistors and inductors and are configured to act as a line between the actual AC micro-grid and the DC micro-grid. 4 shows a circuit diagram of an exemplary AC line simulator.

The AC load simulator 112 is constituted by a resistor, an inductor and a capacitor, and is configured to serve as an AC load of the actual microgrid, and the DC load simulator 120 is constituted by a resistor to serve as a DC load of the actual microgrid . Figure 5 illustrates an exemplary AC load simulator.

Meanwhile, FIG. 6 is a diagram illustrating a flexible test platform for studying control and operation of microgrid according to an embodiment of the present invention.

In a flexible test platform for microgrid control and operation study according to an embodiment of the present invention, the virtual distributed power sources (VDER1 to VDER6) based on inverters or converters, the load simulators 112 and 120, the line simulator 106 114 and the digital control platforms 110, 118 that control the operation of the virtual distributed power sources VDER1 to VDER6.

Thus, in a flexible test platform for studying the control and operation of the microgrid according to an embodiment of the present invention, the first digital platform 110 and the second digital platform 118 generate distributed power sources VDER1 - The operation and performance of the control and operating algorithm of the micro grid according to the output fluctuation of the distributed power source and the fluctuation of the load can be flexibly controlled by changing the load of the load simulators 112 and 120 according to the time It can be tested quickly and reliably.

For example, using a digital control platform, a first converter may perform a droop control of a voltage control mode (VCM), and the remaining two converters may be controlled by a current control (CCM) mode reverse droop control, and it is possible to test the reverse droop controller of the microgrid by changing the load of the load simulator according to time.

According to a flexible test platform for controlling and operating the micro grid according to an embodiment of the present invention, an AC / DC hybrid micro grid including an AC / DC coupled converter as well as an AC micro grid or a DC micro grid Can be used to test the operation and performance of control and operating algorithms, or to more quickly and reliably test the operation and performance of controllers or control algorithms of power converters such as inverters or converters.

A flexible test platform for microgrid control and operation study according to an embodiment of the present invention is designed and tested for microgrid control system, design and testing of inverter control algorithm, design and testing of converter control algorithm, And can be applied to the design and testing of the control algorithm of the conversion apparatus.

In addition, according to the flexible test platform for studying the control and operation of the micro grid according to the embodiment of the present invention, it is possible to flexibly change the structure of the system and to develop and test control algorithms of various converters.

In addition, according to the flexible test platform for studying the control and operation of the micro grid according to the embodiment of the present invention, since a single or a plurality of actual converters can be flexibly connected to directly control various real converters, Can be developed and tested quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be modified or improved.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: AC microgrid 102: DC microgrid
104: AC / DC coupling converter 106, 302: AC line simulator
108, 304: virtual AC distributed power supply unit 109: first interface unit
110, 300: first digital control platform 112, 306: AC load simulator
114: DC line simulator 116: Virtual DC distributed power supply
117: second interface device 118: second digital control platform
120: DC load simulator 122: Third interface device
124: third digital control platform 126: grid connection switch
128: AC / DC converter 130: stationary switch
VDER1 to VDER3: virtual AC distributed power source
VDER4 to VDER6: virtual DC distributed power source
308, 312, 316: inverters 310, 314, 318: converters
320, 322, 324, 326: switches T1 to T14: transformer

Claims (7)

AC microgrid;
DC microgrid; And
And an AC / DC coupling converter for coupling the AC microgrid and the DC microgrid,
The AC microgrid includes a plurality of inverter-based virtual AC distributed power sources, an AC line simulator coupled to each of the virtual AC distributed power sources, an AC load simulator coupled to the AC line simulator, And a first digital control platform for controlling operation,
The DC microgrid includes a plurality of converter-based virtual DC distributed power sources, a DC line simulator coupled to each of the virtual DC dispersed sources, a DC load simulator coupled to the DC line simulator, And a second digital control platform for controlling operation,
The AC microgrid further comprises a first interface device for coupling the first digital control platform and each inverter based virtual AC distributed power source,
Wherein the DC microgrid further comprises a second interface device for coupling the second digital control platform and each converter based virtual DC distributed power source,
Wherein the first interface device comprises:
And converting the magnitude of the signal output from each of the inverter-based virtual AC distributed power sources into the magnitude of a signal that can be processed by the first digital control platform and providing the signal to the first digital control platform, A first signal magnitude converter for converting a magnitude of a signal to a magnitude of a signal that can be processed by the respective inverter based virtual AC distributed power sources and providing the magnitude of the signal to each inverter based virtual AC distributed power source; And
Converting the type of signal output from each inverter-based virtual AC distributed power source to a type of signal that can be processed in a first digital control platform and providing the converted signal to the first digital control platform; And a first signal type converter for converting a type of signal into a type of signal that can be processed in each inverter based virtual AC distributed power source and providing the type of signal to each inverter based virtual AC distributed power source,
Wherein the second interface device comprises:
And converting the magnitude of the signal output from each of the converter-based virtual DC dispersed power supplies into the magnitude of a signal that can be processed by the second digital control platform to provide the signal to the second digital control platform, A second signal size converter for converting a magnitude of a signal to be processed into a magnitude of a signal that can be processed in each converter-based virtual DC dispersed power source and providing the magnitude of the signal to each converter based virtual DC dispersion power source; And
Converting the type of signal output from each converter based virtual DC distributed power source to a type of signal that can be processed by the second digital control platform and providing the converted signal to the second digital control platform, And a second signal type converter for converting the type of signal being processed into a type of signal that can be processed in the respective converter-based virtual DC distributed power source and providing the signal to a converter-based virtual DC distributed power source. Flexible test platform for control and operational research. delete delete The method according to claim 1,
The first digital control platform comprising:
Based on the AC voltage, the AC current, and the DC link voltage of each of the inverter-based virtual AC distributed power supplies to control the operation of each inverter-based virtual AC distributed power source,
The second digital control platform comprising:
Based on the DC voltage, the DC current, and the DC link voltage of each converter-based virtual DC distributed power source, and for controlling the operation of each of the converter-based virtual DC power sources. Flexible test platform. The method according to claim 1,
Wherein each inverter-based AC distributed power source comprises:
AC-AC back-to-back (BTB) inverters,
Each of the converter-based DC-
A flexible test platform for control and operational study of the microgrid, including AC-DC back-to-back (BTB) converters. The method according to claim 1,
Wherein the AC microgrid further comprises a plurality of first switches for connecting or disconnecting the output of each inverter based virtual AC distributed power supply to the AC line simulator,
Wherein the DC microgrid further comprises a plurality of second switches for connecting or disconnecting each of the converter based virtual DC distributed power supplies to the DC line simulator, platform. The method according to claim 1,
A third digital control platform for controlling operation of said AC / DC coupling converter; And
Further comprising a third interface device for coupling the third digital control platform and the AC / DC coupling converter.
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