适用于中抽式Scott牵引变压器的负序补偿方法  

Negative Sequence Compensation Method for Scott Traction Transformer with Secondary Midpoint Drawn-out

作　　者：伍科 卜健怡 郭童 周碧飞 袁在亮 汪学 WU Kel;BU Jian-yi;GUO Tong;ZHOU Bi-fei;YUAN Zai-liang;WANG Xue(The Second Construction Co.,Ltd of China Construction Third Engineering Bureau,Wuhan 430074,China;Guangdong Power Grid Zhanjang Power Supply Bureau,Zhanjiang 524005,China)

机构地区：[1]中建三局第二建设工程有限责任公司,湖北武汉430074 [2]广东电网有限责任公司湛江供电局,广东湛江524005

出　　处：《变压器》2023年第3期59-64,共6页Transformer

摘　　要：传统的负序补偿原理主要是针对直接供电方式的牵引供电系统,并不适用于自耦变压器供电的牵引供电系统。考虑到中点抽出式Scott牵引变压器在自耦变压器供电的牵引供电系统中得到了大量应用,本文中作者以该系统为研究对象,首先对牵引供电系统的结构进行分析,然后通过对牵引变压器一次侧与二次侧电压电流关系分析,提出一种适用于自耦变压器供电的牵引供电系统的负序补偿原理,并结合移相构造原理提出一种负序补偿电流计算新方法,最后通过仿真对本文提出的补偿方法的有效性进行验证。The traditional negative sequence compensation principle is mainly aimed at the traction power supply system with direct power supply mode, and is not suitable for the traction power supply system with autotransformer power supply. Considering that the Scott traction transformer with secondary midpoint drawn-out has been widely used in the traction power supply system powered by autotransformer, this paper takes the system as the research object, first analyzes the structure of the traction power supply system, and then analyzes the voltage and current phasors at the primary and secondary sides of the traction transformer, A negative sequence compensation principle for traction power supply system supplied by autotransformer is proposed, and a new calculation method of negative sequence compensation current is proposed combined with the principle of phase-shifting structure. Finally, the effectiveness of the compensation method proposed in this paper is verified by simulation.

关 键 词：Scott牵引变压器 AT牵引网 负序 

分 类 号：TM922.73[电气工程—电力电子与电力传动]