V/v牵引供电系统中铁路功率调节器的改进滑模控制策略  

Improved Sliding Mode Control Strategy for Railway Static Power Conditioner in V/v Traction Power Supply System

作　　者：杨朋威 康祎龙 苗世洪 郑婷婷 王俊芳 韩佶 YANG Pengwei;KANG Yilong;MIAO Shihong;ZHENG Tingting;WANG Junfang;HAN Ji(State Grid East Inner Mongolia Electric Power Company Limited Electric Power Research Institute,Hohhot 010020,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网内蒙古东部电力有限公司电力科学研究院,呼和浩特010020 [2]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《高电压技术》2020年第6期2218-2229,共12页High Voltage Engineering

基　　金：2018年国网内蒙古东部电力有限公司科技项目(SGMDDK00DJJS1800053)。

摘　　要：针对V/v牵引供电系统中存在的负序和谐波等电能质量问题,提出了一种能够对指令电流快速跟踪和精确补偿的铁路功率调节器控制策略。分析了SS6B型电力机车的工作原理,提出了一种适用于电能质量研究的电力机车建模方法,揭示了V/v牵引供电系统中负序和谐波的产生机理;通过研究铁路功率调节器的拓扑结构和补偿原理,建立了铁路功率调节器主电路的数学模型,推导了以输出补偿电流为状态变量的控制方程;在此基础上,提出了一种基于改进滑模变结构的铁路功率调节器控制策略,实现了对铁路功率调节器补偿电流的精确跟踪,显著改善了V/v牵引供电系统的电能质量;最后基于PSCAD/EMTDC平台搭建了SS6B型电力机车和所提铁路功率调节器控制策略的仿真模型,验证了所建电力机车模型的正确性和所提控制策略的有效性。In view of the power quality problems such as negative sequence and harmonics in V/v traction power supply system,we put forward a control strategy of a railway static power conditioner compensating for reference current rapidly and accurately.The operation principle of SS6 B electric locomotive is analyzed,and an equivalent simulation model which is suitable for power quality research is built.The generation mechanism of negative sequence and harmonic is revealed based on the V/v traction power supply system.The topology and compensation principle of the railway static power conditioner are analyzed,and the mathematical model for railway static power conditioner is established and the control equation of the compensation current is derived.Then the control strategy of railway static power conditioner based on improved sliding mode is proposed,which realizes the accurate tracking of the output current of static power conditioner and then improves the power quality of the V/v traction power supply system.The simulation model of SS6 B electric locomotive is proved to be correct,and the proposed strategy is proved to be effective by the simulations in PSCAD/EMTDC.

关 键 词：V/v牵引供电系统 电能质量 SS6B型电力机车 铁路功率调节器 改进滑模控制 

分 类 号：U223[交通运输工程—道路与铁道工程]