牵引供电系统谐波电流检测方法的仿真研究

Study on MATLAB Simulation of The Real- time Detecting Approaches of Instantaneous Harmonic and Reactive Current in Electrical Railway

针对牵引供电系统对谐波电流检测的要求,介绍了两种检测方法。前者是基于瞬时无功功率原理的谐波电流检测法,后者是基于自适应原理的电流检测原理。理论分析及仿真结果证明两种方法都能检测出电铁供电系统中的谐波电流,分析得知后者的算法和实现更为简单。稳态运行仿真波形证实了所提方法的有效性。

This paper presents two detecting methods of harmonic and reactive current in order to meet the demand of electrical railway feeding system and gives principle diagram of detecting circuit respectively. The former is an instantaneous harmonic current detecting method based on the instantaneous reactive power technology; the latter is harmonic current separate method based on self- adaption detecting theory. Theory analysis and simulation results verify that instantaneous harmonic and reactive currents in electrical railway feeding system can be detected in real time with two methods mentioned before , and the latterr is simpler in algorithm and implement. Simulation waveforms for steady state show the effectiveness of the proposed methods.