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Parallel virtual synchronous generator distributed coordinated operation control method and system

A virtual synchronization and operation control technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of a large number of communications, system frequency restoration to the rated value, and high cost

Active Publication Date: 2016-07-13
TSINGHUA UNIV
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Problems solved by technology

Among them, although the distributed control method can realize the parallel virtual synchronous generators to distribute the load power according to the rated capacity, but when the load changes, it cannot restore the system frequency to the rated value; although the centralized control method can realize the frequency recovery after the system load changes To the rated value, but it requires a lot of communication, the cost is extremely high, and there is a problem of single point failure causing the entire system to fail, and the reliability is poor

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  • Parallel virtual synchronous generator distributed coordinated operation control method and system
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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] The current control of parallel virtual synchronous generators is mainly based on decentralized control and centralized control. Among them, decentralized control makes use of the droop characteristics of virtual synchronous generators to realize load power distribution, but lacks frequency recovery mechanism or other types of power distribution methods; centralized control requires many communication connections, and if one communication line fails, it ...

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Abstract

The invention discloses a parallel virtual synchronous generator (VSG) distributed coordinated operation control method and system. The system comprises a sagging control unit, a frequency recovery unit, an active distribution unit and a consistency control unit. VSGs employ distributed communication. The method and system can realize system power distribution, frequency recovery and stable and reliable operation only through a small amount of information interaction between adjacent VSGs, meanwhile reduce communication base construction and cost, and overcome the deficiencies of distributed and centralized models, and are of great importance in operation controlling of parallel VSGs.

Description

technical field [0001] The present invention relates to the technical field of power generation control, in particular to a method and system for controlling distributed cooperative operation of parallel virtual synchronous generators. Background technique [0002] Energy plays an important role in promoting social development. As a clean and efficient energy form, electricity is related to the national economy and people's livelihood. In response to the energy crisis and environmental pressure, distributed energy such as wind energy and solar energy has received more and more attention. [0003] Vigorously developing distributed power generation is of great significance in improving the economics of power grid operation, optimizing the operation mode of the power system, and building an environment-friendly power system. In July 2015, the "Guiding Opinions on Promoting the Development of Smart Grid" promulgated by the National Development and Reform Commission and the Ene...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 郑天文陈来军王余阳梅生伟
Owner TSINGHUA UNIV
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