电铁牵引负荷对某地区电网电压的影响分析及治理措施  

Influence Analysis and Treatment Measures of Electric Locomotive Load on Power Grid Voltage in a Region

作　　者：叶树平 杜严行 YE Shuping;DU Yanxing(State Grid Ningdong Power Supply Company,Yinchuan 750411,China)

机构地区：[1]国网宁夏电力有限公司宁东供电公司,宁夏银川750411

出　　处：《山东电力技术》2022年第4期46-52,共7页Shandong Electric Power

摘　　要：针对电铁牵引负荷引起对某地区电网电压波动的问题,简述了电铁牵引供电系统的基本原理,分析出电铁牵引负荷所产生的谐波电流和负序电流是引起电网电压波动的理论原因,并建立系统等效分析模型,通过电力系统短路容量这一衡量电力系统强弱的理论分析,得出供电电源系统强弱是引起电压波动的实际原因,该电铁牵引负荷在由不同变电站供电时对电网电压的影响比较分析充分证明这一点。针对分析结果,提出了电压波动的治理措施,能为今后电力系统安全稳定运行提供借鉴和指导。To solve the problem of voltage fluctuation caused by electric locomotive load to a regional power grid,the basic principle of electric railway traction power supply system was briefly described.Through theoretical analysis,it was concluded that the harmoniccurrentand negativesequencecurrentgenerated byelectriclocomotiveload arethecausesofpowergrid voltage fluctuation.Then,the system equivalent analysis model was established.Through the theoretical analysis of power system short⁃circuit capacity,which measures the strength of power system,it was concluded that the strength of power supply system is the actual cause of voltage fluctuation.It was proved by the comparative analysis of the impact of electric locomotive load on grid voltage when supplied by different substations.Combined with the analysis results,the control measures of voltage fluctuation were proposed,which can provide reference and guidance for the safe and stable operation of power system in the future.

关 键 词：电铁负荷 短路容量 谐波电流 

分 类 号：TM712[电气工程—电力系统及自动化]