电力系统中谐波的产生、危害与抑制VIP免费

电力系统中谐波的产生、危害及抑制摘要: 随着电力系统的发展以及电力市场的开放，电能质量问题越来越引起广泛关注。由于各种非线性负载(谐波源)应用普及，产生的谐波对电网的污染日益严重。因此，谐波及其抑制技术己成为国内外广泛关注的课题。在电力电网中，存在大量非线性负载,引起电网电流波形不再是正弦波。这一非正弦波可用傅里叶级数分解成为一个直流量，基波正弦量和一系列频率为基波频率整数倍的高次谐波正弦分量之和。各国对电力电网电压正弦波形畸变的极限值都有明确的规定，要求用户对接入电网的设备产生的谐波应采取一定措施，进行抑制。关键词：电力系统；谐波产生；谐波危害；谐波抑制In power system harmonic generation, harm and inhibition Abstractwith the development of electric power system and power market opening, power quality problems attracting increasing attention. byIn various nonlinear load (harmonic source) application popularization, produce the harmonic for grid of serious pollution. Therefore, the harmonicAnd its control technology has become great attentions topic. In the power grid, the presence of a nonlinear loads, cause grid current waveform is no longer sine wave. This a non sinusoidal usable Fourier decomposition into a straight flow, base wave sine and a series of frequency for base wave frequency integer times higher harmonic sinusoidal components combined. Countries to power grid voltage distortion sinusoidal waves of all limits to have specific provision, require the user to access the grid equipment produced a harmonic should adoptKeywords: electric power systems, Harmonic; Harmonic harm; Harmonic control电力系统理想的电压、电流波形是正弦波。但由于电力系统中存在各种非线性元件,使电压和电流波形发生畸变产生谐波。谐波会造成电网的功率损耗增加、设备寿命缩短、保护功能失常,还会引起变电站局部并联或串联谐振,造成电压互感器等设备损坏。 随着工业、农业和人民生活水平的不断提高，除了需要电能成倍增长，对供电质量及供电可靠性的要求也越来越多，电力质量（...