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Cooperative control method and system for virtual synchronous microgrid

A virtual synchronization and collaborative control technology, applied in photovoltaic power generation, electrical components, circuit devices, etc.

Pending Publication Date: 2021-03-30
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the introduction of virtual synchronous machine technology, there are currently blind spots in how to efficiently coordinate and operate among the units in this new type of microgrid, and the efficient coordination between virtual synchronous units in the virtual synchronized microgrid is to ensure this. The normal operation of the new microgrid is an important prerequisite for stable grid connection, so the present invention provides a collaborative control method between units in the virtual synchronized microgrid

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  • Cooperative control method and system for virtual synchronous microgrid
  • Cooperative control method and system for virtual synchronous microgrid
  • Cooperative control method and system for virtual synchronous microgrid

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Embodiment Construction

[0041] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0042] Such as figure 1 As shown, the present invention provides a collaborative control method for a virtual synchronized microgrid, including:

[0043] S1 When the frequency of the pre-built virtual synchronous microgrid fluctuates, use the dual-quadrant frequency characteristic analysis method to analyze the power before and after the frequency fluctuation, and respectively determine the virtual synchronous motor, virtual synchronous generator, grid and energy storage to participate in a frequency modulation time output;

[0044] S2 uses the output of the virtual synchronous motor, virtual synchronous generator, power grid and energy storage to participate in primary frequency regulation to perform coordinated control, so as to maintain the frequency balance of the virtual synchronous ...

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Abstract

The invention provides a cooperative control method and system for a virtual synchronization microgrid, and the method comprises the steps: carrying out the analysis of the power before and after frequency fluctuation through a double-quadrant frequency characteristic analysis method when the frequency of the pre-built virtual synchronization microgrid fluctuates, respectively determining outputsof the virtual synchronous motor, the virtual synchronous generator, the power grid and the stored energy participating in primary frequency modulation; performing cooperative control by utilizing theoutput of the virtual synchronous motor, the virtual synchronous generator, the power grid and the stored energy participating in primary frequency modulation, so that the frequency of the virtual synchronous microgrid is kept balanced; the virtual synchronous microgrid comprises a virtual synchronous generator constructed based on an optical storage system, a virtual synchronous motor constructed based on an electric vehicle, and a power grid and an energy storage which are connected with the virtual synchronous motor and the virtual synchronous generator. According to the invention, the stable operation of the virtual synchronization microgrid is controlled.

Description

technical field [0001] The invention relates to the field of operation control of a microgrid system, in particular to a collaborative control method and system for a virtual synchronized microgrid. Background technique [0002] As one of the interfaces between distributed power generation and large power grid, microgrid is a key research field today. The existence of a large number of power electronic interfaces in the microgrid makes the system lack sufficient inertia support, especially in the island mode and mode switching process. To solve this problem, virtual synchronous machine technology has attracted extensive attention. Introducing it into each typical link in the microgrid to form a virtual synchronized microgrid can effectively improve system stability and dynamic performance. [0003] At present, there have been many researches on virtual synchronous machine stand-alone technology. The swing equation of synchronous motor is added to the traditional control to...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/38H02J3/46H02J3/28
CPCH02J3/28H02J3/381H02J3/46H02J3/241H02J2300/24Y02E10/56
Inventor 熊雄吴鸣徐旖旎张海邵瑶张颖
Owner CHINA ELECTRIC POWER RES INST