基于模块化多电平换流器的牵引供电负序治理  

Negative Sequence Governance for Traction Power Supply Based on Modular Multilevel Converter

作　　者：宋平岗[1] 林家通 李云丰[2] 吴继珍[1] 

机构地区：[1]华东交通大学电气与电子工程学院,南昌330013 [2]中国电力科学研究院,北京100192

出　　处：《电源学报》2015年第6期18-27,共10页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51367008)~~

摘　　要：为解决牵引变的负序问题并补偿无功功率,采用两组单相模块化多电平换流器MMC背靠背连接构造铁路功率调节器RPC,直接接入牵引网。首先,建立了单相MMC数学模型;然后通过二阶广义积分构造正交虚拟分量,将其转换到旋转坐标系下,设计双闭环控制器,并以V/v牵引变为例,定量分析并补偿有功和无功;最后,在Matlab中搭建了基于MMC-RPC向V/v牵引变提供负序治理及无功补偿的仿真系统。仿真结果证明了MMC运用到RPC的可行性以及控制策略的有效性。In order to solve the problem of negative sequence and reactive power compensation of traction, back-toback connection structure of railway static power conditioner （RPC） composed of two single-phase modular multilevel converters （MMC） is designed to access to the traction network directly. First, mathematical model of single-phase MMC is established, a virtual ac component using second order generalized integrator（SOGI） is created. Then, a double closed loops controller in synchronous rotating frame is proposed. Taking V/V traction into example, Quantitative is analyzed and active and reactive power are compensated. Finally, a simulation system based on MMC-RPC provide negative sequence control and reactive power compensation for V/v traction is constructed in Matlab. The results show that the feasibility of MMC applied to RPC and effectiveness of control strategy.

关 键 词：V/v牵引变 负序 铁路功率调节器(RPC) 模块化多电平换流器(MMC) 单相H桥 二阶广义积分 功率 

分 类 号：TM721[电气工程—电力系统及自动化]