Research on Multi-objective Coordinated Control Strategies of Grid-connected Inverter Under Unbalanced Voltage Conditions
Yang Tong-guang1, 2, Gui Weihua2
1.College of Information Science and Engineering Hunan City University Yiyang 413000 China 2.College of Information Science and Engineering Central South University Changsha 410083 China
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.
阳同光, 桂卫华. 电网不平衡情况下并网逆变器多目标协调控制策略研究[J]. 电工技术学报, 2015, 30(11): 148-157.
Yang Tong-guang, Gui Weihua. Research on Multi-objective Coordinated Control Strategies of Grid-connected Inverter Under Unbalanced Voltage Conditions. Transactions of China Electrotechnical Society, 2015, 30(11): 148-157.
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2015, Vol. 30 
