基于虚拟同步机的新能源并网智能控制研究

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Abstract With the large-scale grid connection of new energy, the stability and inertia of the power grid have decreased. The virtual synchronous control of the grid connection converter can respond to the changes of the power grid and provide inertia support for the power grid. However, the output command of the existing conventional virtual synchronous machine control method is constant, which can not be dynamically adjusted according to the unit operating conditions, and the ability to participate in the regulation of the power grid is limited. According to the frequency change of power grid and the generation power of each unit, the fuzzy controller provides the reference power of virtual synchronous machine through fuzzy decision and control, and decides the working mode of virtual synchronous machine (power setting mode or droop control mode), so as to realize the intelligent control of grid connected new energy. The simulation results show that the proposed method can automatically adjust the output of virtual synchronous machine based on the actual operating conditions and frequency changes of power grid. The new energy can automatic participate in the frequency and voltage regulation of power grid by the intelligent controller, which maintains the stability of power grid.

Key words： virtual synchronous machine fuzzy control grid connected new energy intelligent control synchronous inverter

Received: 20 May 2022

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	HU Shiyang
	LIU Guorong

Cite this article:

HU Shiyang,LIU Guorong. Research on intelligent control of grid connected new energy based on virtual synchronous machine[J]. Electrical Engineering, 2022, 23(10): 10-17.

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http://dqjs.cesmedia.cn/EN/Y2022/V23/I10/10

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