客货混跑山区铁路供用电品质综合测试与治理

我国客货混跑山区铁路具有线路崎岖蜿蜒、长大坡度多、沿线电网容量小等特点,且存在交直交机车和交直机车混跑情况,会造成牵引变电所功率因数低及谐波含量超标等电能质量问题,对线路正常运行形成挑战。以某山区客货混跑电气化铁路为例,开展供用电品质综合测试,基于相关标准,对电压偏差、功率因数、三相电压不平衡、谐波等电能质量指标进行定量分析,为山区牵引变电所的设计、建设与安全运营提供参考。针对功率因数和谐波问题,提出一种电气化铁路用电品质补偿装置进行治理,以保障山区铁路安全高效运行。

Comprehensive Test on and Improvement of Power Supply and Utilization Quality of Mountain Railways with Mixed Passenger and Freight Transport

Mountain railways with mixed passenger and freight transport in China are characterized by rugged and winding lines,long and steep gradient,and small power grid capacity along the lines.The mixed operation of trains with the AC-DC-AC locomotives and those with AC-DC locomotives would cause power quality problems such as low power factor and excessive harmonic content at the traction substations,which will challenge the normal operation of such railways.With an electrified mountain railway with mixed passenger and freight transport as an example,and based on the comprehensive test of power supply quality,the power quality indicators such as voltage deviation,power factor,three-phase voltage imbalance and harmonic are quantitatively analyzed,according to the relevant standards,which will provide a reference for the design,construction and safe operation of the traction substations in mountainous areas.With respect to the power factor and harmonic problems,a power quality compensation device for the electrified railways is put forward to ensure the safe and efficient operation of the railways.