计及无功功率的谐波源检测方法研究

Research on Harmonic Source Detection Method Considering Reactive Power

为确定电力系统中谐波源的位置,研究了一种新的定位方法。方法基于当前对于无功功率的不同定义,在相同的电力系统环境中不同定义下的无功功率值存在一定的联系与差异,通过理论分析指出这些联系与差异的原因,说明了其能够对谐波源检测研究提供有用信息的原理及方法。并通过在单相和三相系统中进行了仿真验证,且在单相系统中与有功功率定位法进行了对比,指出了所提方法的准确性。最后在标准的IEEE三相测试系统进行了多谐波源和负载谐波变化情况下的仿真,仿真结果验证了所提方法的有效性,能够为电力系统中谐波源的检测提供帮助。

To determine the position of harmonic source in power system,a method based on reactive power comparison was proposed. Based on the current methods for different definitions of reactive power in power system,in the same environment there are some connections and differences in reactive power values under different definitions. Through theoretical analysis,this paper pointed out the principle for these relations and differences,explained the principle and method for providing useful information for detection of harmonic sources. Through the simulation of single-phase and three-phase systems,and compared with the active power localization method in single-phase system,the accuracy of this method was pointed out. Finally,the simulation of multi-harmonic sources and load harmonic changes was carried out in the standard IEEE three-phase test system. The simulation results verify the effectiveness of the proposed method and can provide help for the detection of harmonic source in power system.