电气化铁路对电力系统安全运行的影响及对策

电力机车为波动性很大的大功率单相整流负荷,可能威胁电力系统的安全运行。本文介绍牵引负荷在电力系统中引起的负序电流对电力系统的影响及降低和限制负序电流的措施;从工程和经济两个角度说明了不平衡谐波对电力系统的危害,并提出了一些应对措施;针对电铁负荷功率因数较低的现象,分析了无功补偿的必要性以及目前存在的问题和解决措施。

Impact of Electrified Railway on Power System Security Operation and Countermeasures

The electrified railway is a fluctuating high- power single- phase commutation load, which may threat power sys-tem security operation. This paper introduces the impac of the negative sequence electric current on the power system whichcaused by traction load, and the way to reduce it, explains the impairment of the unbalanced harmonic on the power systemin the views of project and economy, and puts forward a series of measures for preventing the impairment. Because the pow-er factor is low, the reactive power compensation is important. This paper explains the problems of the reactive power com-pensation and how to solve them.