中文摘要：

针对微电网谐波电流和无功不足等电能质量问题．提出一种能同时进行谐波抑制和无功补偿的并网逆变器。综合运用广义瞬时无功功率电流检测方法，利用正反向同步旋转坐标系变换，有效地检测出电流负序和基波无功分量。同时针对传统比例积分（PI）控制的不足，提出广义比例谐振算法，实现了对多次谐波无静差控制。最后，利用Matlab／Simulink仿真实验验证了理论分析的正确性。

英文摘要：

Due to the power quality problem of micro-grid in harmonic current and reactive power shortage, a grid-con- nected inverter which can suppress harmonic and compensate reactive power is proposed.On the basis of analyzing the synthesis application of the generalized instantaneous reactive power current theory, the positive and negative syn- chronous rotating coordinate transformation is used to detect the negative current sequence and fundamental reactive component effectively.Simultaneously, in view of the disadvantage of traditional PI control, a generalized proportion integral resonant algorithm is proposed, realizing static error free tracking control of harmonics.Finally, simulation results show that the proposed multi-function grid-connected inverter can effectively balance currents, correct power factor and eliminate harmonic currents.