摘要
研究目的:地铁电网中接入的非线性电压—电流特性的电器设备数量日益增多,这些非线性负载产生的谐波电流在电网的阻抗上产生谐波电压并与电网的基波电压叠加引起电压畸变,造成一系列危害,严重时将危机行车安全。针对谐波产生的机理和滤波治理方式进行分析,提出可消除谐波和提高功率因数的滤波方式及治理方案。研究结论:针对在地铁电网中谐波产生的机理,通过对有源滤波和无源滤波性能的分析与比较,提出采用有源滤波治理谐波的方案。并对有源滤波的工作原理、设置原则、选择要求等进行了阐述,通过实例测试验证,采用有源滤波可以比较有效地消除谐波和提高供电系统的功率因数。
Research purposes： The number of electrical equipments characterized nonlinear voltage current is increasingly connected to metro power grids. The harmonics current generated by these nonlinear loads will produce the harmonics voltage on the impedance of metro subway power grids, and will superimpose on the fundamental power system voltage to cause the voltage distortion, resulting in a series of hazards and seriously endangering the traffic safety. In this paper, the discussions are made on the mechanism of harmonic generation and control measures, and the filtering way and harmonic treatment plan are offered for eliminating harmonic current and enhancing power factors. Research conclusions：Through analyzing the mechanism of harmonic generation and comparing the active filter system with the passive filter system, the harmonic treatment plan with active filter technology is pointed out and the introduction is given to the working principle, installation principle and option requests of the active filter system. The application of active filter system shows using the active filter technology can effectively eliminate the harmonic current and enhance the power factor of power supply system.
出处
《铁道工程学报》
EI
北大核心
2009年第9期93-97,共5页
Journal of Railway Engineering Society
关键词
地铁电网
谐波治理
有源滤波
metro power grid
harmonic treatment
active filter
