电力系统谐波分析

Harmonic Analysis of Power System

电力系统的整体网络构成十分复杂,通过实测全网的谐波分布进行数据分析是不实际的,所以需要建立模型进行系统谐波的分析,并且对电力系统中的谐波进行监测和统计。通过电力系统的谐波分析,可以发现电力系统运行中出现故障振荡的所有问题,进行谐波分析计算可以判断系统中电压与电流波形发生畸变的程度,从而诊断出电力系统是否处于谐波谐振状态。所以,对信号进行分析从而提取各次分量的振荡频率、衰减、相角和幅值,这些电力系统中谐波的实际测量数据,是探测谐波的主要依据。

The whole network of electric power system is very complex,and the data analyzed with actual harmonic network distribution is not practical,so it is necessary to analyze the harmonic system through the establishment of model,monitor and statistically analyze the harmonic in power system. Through the harmonic analysis of the power system,we can find all the problems of the fault oscillation in the operation of the power system. The harmonic analysis can judge the degree of distortion of the voltage and current waveform in the system,thus diagnosing whether the power system is in the harmonic resonance state. Therefore,the signal is analyzed to extract the oscillation frequency,attenuation,phase angle and amplitude of each component. The actual measurement data of harmonic in these power systems is the main basis for detecting harmonics.