电网不平衡情况下并网逆变器多目标协调控制策略研究

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Abstract Under unbalanced power grid voltage conditions, the fluctuating active power and current have quadratic ripples and distortions in the grid-connected inverters.In order to improve the quality of the grid-connected current, and reduce the impacts to the grid caused by the grid-connected inverter effectively, a grid-connected inverter control strategy based on the neural network is proposed.The unified analytic formula of the control target is established based on the instantaneous power and the accordingly derived output reference current.An ADALINE neural network is use to optimize the coefficient of the reference current vector formula.In order to improve the system anti-interference capability, a RBF neural network is used to adjust the parameters of the PI controller on-line.The effectiveness and applicability of the proposed strategy are finally verified by simulation and experimental results.

Key words： Grid voltage unbalance grid-connected inverter multi-objective coordinated control neural network

Received: 21 November 2014 Published: 29 June 2015

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TM315

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	Yang Tong-guang
	Gui Weihua

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Yang Tong-guang,Gui Weihua. Research on Multi-objective Coordinated Control Strategies of Grid-connected Inverter Under Unbalanced Voltage Conditions[J]. Transactions of China Electrotechnical Society, 2015, 30(11): 148-157.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I11/148

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