Coordination of multiple grid-connected inverters for harmonic compensation
来源期刊：中南大学学报(英文版)2014年第8期
论文作者：GUO Xiao-rui(郭晓瑞) GUO Ji-feng(郭吉丰) WANG Jian(王剑)
文章页码：3126 - 3132
Key words：active filter; harmonics; grid-connected inverter; decoupling control; coordination
Abstract: For multiple grid-connected inverters with active filter function, it makes sense to regulate every unit to output maximum active power from photovoltaic arrays, as well as eliminate the harmonic due to the non-linear loads connected to the electric networks. Naturally, a centralized control coordination strategy was proposed for the purpose of high facility utilization, good harmonic compensation ability and unwanted overcompensation condition. Based on a vector decoupling control scheme and generalized instantaneous reactive power theory, the solution was to allocate the harmonic eliminating task for every inverter according to the instantaneous power margin of each. The grid current always keeps sinusoidal in spite of non-linear load change and output active power change for any inverter. The simulation results validate the efficacy of the proposed coordination strategy.
GUO Xiao-rui(郭晓瑞), GUO Ji-feng(郭吉丰), WANG Jian(王剑)
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract:For multiple grid-connected inverters with active filter function, it makes sense to regulate every unit to output maximum active power from photovoltaic arrays, as well as eliminate the harmonic due to the non-linear loads connected to the electric networks. Naturally, a centralized control coordination strategy was proposed for the purpose of high facility utilization, good harmonic compensation ability and unwanted overcompensation condition. Based on a vector decoupling control scheme and generalized instantaneous reactive power theory, the solution was to allocate the harmonic eliminating task for every inverter according to the instantaneous power margin of each. The grid current always keeps sinusoidal in spite of non-linear load change and output active power change for any inverter. The simulation results validate the efficacy of the proposed coordination strategy.
Key words:active filter; harmonics; grid-connected inverter; decoupling control; coordination
