多谐波合成的测试与研究  

Measuring and Research for Multi-harmonics Synthetic

作　　者：刘兵 谢明华 

机构地区：[1]新东北电气(锦州)电力电容器有限公司,辽宁锦州121000

出　　处：《电力电容器》2007年第4期1-5,36,共6页Power Capacitors

摘　　要：冶理供电网络的谐波,从较精确地估算谐波电流源的谐波含量开始,同一接入点有多个谐波源时,首先考虑利用不同谐波源的相位关系,以减小注入电网的某些较低频率的谐波电流。采用先进的多通道数字化波形记录装置,可以同时记录下多个谐波电流源的数字离散畸变波形,利用快速傅里叶变换的算法,可以比较准确地分析出各个谐波电流源同一时间的畸变波形中基波电流以及各个谐波电流的幅值和初相位。从而在机理上说明,利用多个谐波源的相位关系可以减小谐波电流源的合成谐波电流。Starting from more precise estimation of the harmonics components of the current source to administrate the harmonics in supply network, when there exist multi-harmonic sources at the point of common coupling, the phase relationship of different harmonic sources was firstly used as to reduce the harmonic currents with lower frequencies injected into the network. Then, using multichannel digital wave recorder, the digital discrete waveform in multi-harmonic current sources could be recorded at the same time, and with fast Fourier analysis, the magnitudes and the initial phases of the fundamental and every harmonic currents could be calculated in the distorted waveform of each harmonic current source occurred at the same time. It can be concluded that the synthetic harmonic current of the harmonic current source can be reduced by using the phase relationship within multiharmonic sources.

关 键 词：交交变频传动系统 谐波相位 谐波抑制 

分 类 号：TM935[电气工程—电力电子与电力传动]