电力系统闪变与间谐波关系的研究

Research on Relationship Between Voltage Flicker and Inter-Harmonics in Power System

从电力系统中电压闪变与间谐波的来源出发,分析了两者之间的关系;通过数学方法推导出电压波动参数和间谐波参数之间的定量关系,得出周期性的电压波动所引起的间谐波参数是可计算的结论,并给出了具体的计算公式;对应地,由间谐波所引起的电压波动一定是周期性的,并且其包络的波动频率是间谐波频率和与之最相邻的谐波频率之差。最后,基于MATLAB软件的仿真验证了结论的正确性。

This article firstly introduced the sources of voltage flicker and inter-harmonics in power system,and analyzed the symbiosis relation between them. Then the quantitative relationship between voltage fluctuation parameters and inter-harmonic parameters was deduced through mathematical method,and drew the conclusion;the parameters of inter-harmonics caused by periodic voltage fluctuation can be calculated, and the calculation formula was given in the paper. Accordingly, the voltage fluctuation caused by inter-harmonics must be periodical, and its envelope fluctuation frequency is the difference value between inter-harnonic frequency and the adjacent harmonic frequency. The simulations based on MATLAB software verify the validity of the conclusion.