针对微电网电流、电压谐波复合治理的问题进行了研究，提出了一种逆变电源并联结构的微电网谐波复合治理方法，分析了微电网谐波复合治理的原理。结合虚拟阻抗技术、下垂控制技术、比例谐振( PR)控制技术分别设计了2台逆变器各自的控制策略，使其具有分别治理电流和电压谐波的能力。2台逆变器并联运行，可实现微电网电流、电压的复合治理，且各自基波功率能够按照设计容量精确分配。最后利用MATLAB/Simulink在微电网离网、并网运行模式下验证了所提策略的可行性和有效性。%An improved controller design method for inverter’ s operating with extra function to suppress current harmonics or voltage harmonics was proposed. When at least two this-type inverter operating in micro-grid, they could collaboratively bear current harmonics and voltage harmonics suppression tasks respectively. This would benefit the micro-grid further wide application. Firstly, the principles of harmonics comprehensive suppression were analyzed. Then, combining with virtual output impedance design technology, droop control strategy, and proportional resonant (PR) control method, two kinds inverter controllers with different harmonics suppression purpose were designed. Finally, the effectiveness of the above control strategies was verified by MATLAB/Simulink simulation results. The total harmonic distortion ( THD) values of current and voltage were obviously reduced with higher power allocation accuracy when these two inverters parallel connected with the micro-grid.
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