光伏并网发电与无功补偿的鲁棒预测控制

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Abstract For the single-phase photovoltaic grid-connected generation system installed at the end of the grid, a robust predictive control strategy with the function of active power generation and reactive power compensation is proposed. By this way, the system can provide not only active power to the grid and the local loads, but also the required reactive power to the loads. Based on the analysis of the system structure, two-phase orthogonal currents is constructed, and the dc component of the reactive current of the loads is acquired by the #em/em#_p-#em/em#_q algorithm based on the instantaneous reactive power theory, and the DC component of the active current is derived from the output of the PI controller of the outer voltage loop, and thus the grid-connected command current is obtained. Considering the delay and the filtering inductance variation in the conventional deadbeat controller, the robust predictive current deadbeat control is proposed to enhance the system robustness and reduce the current distortion due to the control delay and inductance deviation. In z-domain, the system transfer function is derived, and the system stability is analyzed, and the control parameters are selected. Simulation and experimental results verify the validity of the proposed control strategy.

Key words： Photovoltaic grid connected generation reactive power compensation single-phase reactive current detection robust predictive current deadbeat control

Received: 20 February 2012 Published: 26 March 2014

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TM615

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	Chen Yandong
	Luo An
	Peng Ziqiang
	Zhou Jie
	Zhou Leming

Cite this article:

Chen Yandong,Luo An,Peng Ziqiang等. Robust Predictive Control Strategy for Photovoltaic Grid-Connected Generation and Reactive Power Compensation[J]. Transactions of China Electrotechnical Society, 2013, 28(11): 239-246.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I11/239

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