电铁牵引站接入薄弱电网供电质量评估分析  

Evaluation and Analysis of Power Supply Quality of Electric Railway Traction Station Connected to Weak Grid

作　　者：赵宏程 李再华 曾毅 张俊杰 张波琦 刘川平 孙晓佳 ZHAO Hongcheng;LI Zaihua;ZENG Yi;ZHANG Junjie;ZHANG Boqi;LIU Chuanping;SUN Xiaojia(State Grid Tibet Power Co.,Ltd.,Electric Power Research Institute,Lhasa 850000,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]国网西藏电力有限公司电力科学研究院,西藏拉萨850000 [2]中国电力科学研究院有限公司,北京100192

出　　处：《电工技术》2023年第5期10-12,共3页Electric Engineering

摘　　要：电气化铁路具有输送能力大、能源消耗小、运输成本低、经济效益好和无环境污染等优点,是连通我国东西部的重要“桥梁”。受机车频繁启停、变速等因素影响,铁路负荷具有冲击性强、波动性大等特点。当大功率冲击性铁路负荷接入薄弱电网时,可能会造成电压不平衡、电压偏差、谐波等问题,严重影响电网安全运行,因此有必要对接入电网的铁路牵引变电站进行供电质量评估分析。以某电气化铁路牵引变电站为例开展供电质量综合测试,并基于国家相关标准,对该典型牵引变电站电压不平衡度、电压偏差、谐波、三相电压不平衡度等电能质量指标进行了定量评估分析,为接入薄弱电网的电铁牵引站安全高质运行提供可靠数据支撑。Electrified railway has significant advantages such as large transportation capacity,small energy consumption,low transportation cost,good economic benefits and no environmental pollution,and is an important"bridge"connecting China's east and west.Due to the frequent start and stop of the locomotive,speed change and other factors,the railway load has the characteristics of strong impact and large fluctuation.When high-power impact railway load is connected to the weak power grid,it may cause problems such as voltage imbalance,voltage deviation and harmonics,which seriously affect the safe operation of the power grid.Therefore,it is necessary to evaluate and analyze the power supply quality of railway traction substations connected to the power grid.In this paper,taking an electrified railway traction substation as an example,the comprehensive test of power supply quality is carried out.Based on relevant national standards,the quantitative evaluation and analysis of power quality indicators such as voltage imbalance,voltage deviation,harmonic and three-phase voltage imbalance of this typical traction substation are carried out,providing reliable data support for safe and high-quality operation of electric railway traction stations connected to weak power grids.

关 键 词：供电品质评估 薄弱电网 电压偏差 谐波 

分 类 号：TM922[电气工程—电力电子与电力传动]