多母线微电网稳态谐波电压间接分析方法*

摘要

With the increase of power electronics based applications and non-linear loads, a large number of harmonics will inject into microgrid, which is hazardous to the security, stability and economy of microgrid. Therefore, this paper presents a novel harmonic analysis method for multi-bus microgrid, which is based on Fast Fourier Transform method and microgrid network equivalent equations. This method can assume the measured voltages and currents of micro-sources to assess the steady state harmonics of adjacent bus voltages indirectly. The Matlab simulation and the constructed experimental prototype have verify the effectiveness of the proposed harmonic analysis method.%随着电力电子装置的广泛应用和非线性电气设备的增加，大量谐波注入微电网，对微电网的安全、稳定和经济运行造成严重影响。针对以上问题，以微电源出口处检测到的电压和电流数据为参考，根据快速傅里叶分析方法得到各次电压谐波参数，结合微电网网络方程，提出了适合稳态情况下多母线微电网中微电源相邻母线谐波电压的间接分析方法。基于Matlab的仿真结果和实验结果有效验证了所提计算方法的正确性。