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近些年来,随着经济的发展,电气化铁路在中国取得了巨大的发展。电气化铁路运行时,将产生三相不平衡的谐波电流和负序电流注入到系统,造成电网电压波形畸变、系统功率因素降低等问题,对电力系统安全、稳定和经济的运行带来严重的影响。本文分析了电气化铁路运行产生谐波的原因,提出解决措施,为改善电网电能质量提供了依据。
In recent years, with the economic development, the electrified railway has made tremendous development in China. During the operation of the electrified railway, three-phase unbalanced harmonic current and negative sequence current are injected into the system, causing problems of grid voltage waveform distortion and system power factor reduction, which bring serious problems to the safe, stable and economical operation of the power system influences. This paper analyzes the causes of harmonics in the operation of electrified railway, puts forward the solutions and provides the basis for improving the power quality of power grid.