Abstract：For the single-phase photovoltaic grid-connected generation unit installed at the end of the grid, a single current feedback control strategy based on active damping optimization is proposed. The synchronous reference frame proportional intergral (SRFPI) strategy is adopted to control the grid current with zero steady-state regulation. By this way, the system could quickly provide low harmonic distortion current and the required reactive power. Through sampling and feeding back the derivative and high frequency component of the grid current, the system damping increases while the number of sensors decreases. Meanwhile, the optimization method can decrease the multiple variables of feedback factors to single one, which reduces the complexity of system and improves the system performance. The paper designs the grid power control, and analyzes the method of SRFPI as well as the system performance under different control parameters of the single current feedback control strategy. Meanwhile, the selection method of optimization parameters is also proposed. Simulation and experimental results verify the proposed control strategy.
周乐明, 罗安, 陈燕东, 陈智勇, 龙际根, 王明玥. 单相LCL型并网逆变器功率控制及有源阻尼优化方法[J]. 电工技术学报, 2016, 31(6): 144-154.
Zhou Leming, Luo An, Chen Yandong, Chen Zhiyong, Long Jigen, Wang Mingyue. A Single-Phase Grid-Connected Power Control and Active Damping Optimization Strategy with LCL Filter. Transactions of China Electrotechnical Society, 2016, 31(6): 144-154.
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2016, Vol. 31 
