电气化铁路供电电能质量测试主要结果分析

Analysis on Main Results of Power Quality Test of Power Supply for Electrified Railway

为掌握电气化铁路供电电能质量现状,确保电网安全运行,满足电气化铁路快速发展的供电需求,国家电网公司组织了一次大规模测试。文章根据向电气化铁路供电的变电站电能质量测试结果,就谐波、负序等主要测试数据及电气化铁路供电中的主要问题进行整理和分析。结果表明,电气化铁路牵引负荷功率因数偏低,产生的谐波和负序分量普遍超标,劣化了电网电能质量,给电网安全稳定带来隐患,应引起高度重视并积极解决。

In order to grasp present condition of power quality in the power supply for electrified railway to ensure the secure operation of power grid and to meet the demand on power supply due to rapid growth of electrified railway, the State Grid Corporation of China organized a large-scale testing of power quality. According to the power quality testing results of substations supplying electric power to electrified railway, the authors put in order the main problems in the power supply for electrified railway and analyze the main testing data such as harmonics and negative-sequence components. Analysis results show that the power factors of traction loads of electrified railway are low and the harmonics and negative-sequence components produced by traction loads generally exceed specified limits, it makes the power quality of power system deteriorated and brings hidden danger to power system security and stability, thus much attention should be paid to this problem and its solution.