摘要
针对电气化铁路供电系统对谐波及无功电流检测的要求,采用混合型电力滤波器对谐波进行滤波。介绍了基于鉴相原理的瞬时谐波电流检测法,以及采用空间矢量脉宽调制控制方法,使逆变器产生出待补偿电流,来抵消因电铁牵引负荷的使用给电力系统带来的谐波影响。通过理论分析和仿真结果证明,该方法能实时地检测出电铁供电系统中的瞬时谐波及无功电流,且该方法简单、有效。
The paper presents a detecting method of harmonic and reactive current in order to meet the demand of electrical railway feeding system. The method is an instantaneous harmonic current detecting method based on the phase distinguishing technology. In the APF, the trigger currents are detected by means of the method based on the phase distinguishing technology, and on the basis of the trigger currents, the currents for compensation are obtained from the inverter under the control of SVPWM. Theory analysis and simulation results verify that instantaneous harmonic and reactive currents in electrical railway feeding system can be detected in real time with the method mentioned before, and the method is simple and effective.
出处
《青海电力》
2008年第2期54-57,共4页
Qinghai Electric Power
关键词
电气化铁路
供电系统
混合型电力滤波器
谐波检测
实时检测
electrical railway
power supply system
hybrid power filter
harmonic detection
real time detection
