基于<em>H</em><sub>∞</sub>混合灵敏度的并网逆变器谐振控制策略

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Abstract With the successive integration of renewable energy and distributed generation into the power grid, the power quality of grid-connected power has attracted much attention. As the connection hub between distributed generation and AC grid, the grid-connected inverter is the key to solving the problem of power quality. In order to reduce the resonance of inverter output voltage and current, a H_∞ robust control strategy based on virtual synchronous machine algorithm is proposed. Firstly, on the basis of system performance requirements, the sensitivity weighting function is selected to solve the problem of grid parameter fluctuation, and the mathematical model and state space equation of the grid-connected inverter system are established. Finally, the H_∞ controller is obtained by solving the algebraic Riccati equation. Compared with the traditional PI control method and the droop control method on the Matlab/Simulink simulation platform, it is verified that the method proposed in this paper has strong anti-interference and stability in response to changes in grid parameters and filter parameter fluctuations.

Key words： grid-connected inverter virtual synchronous machine H_∞ control resonance suppression

Received: 06 July 2022

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	ZHANG Ping
	SHEN Xinhe

Cite this article:

ZHANG Ping,SHEN Xinhe. Resonance control strategy of grid connected inverter based on hybrid sensitivity[J]. Electrical Engineering, 2022, 23(11): 6-12.

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http://dqjs.cesmedia.cn/EN/Y2022/V23/I11/6

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