模块化多电平柔性直流控制保护系统动模仿真研究  

Simulation Research on Dynamic Physical Model of Control and Protection System for the Modular Multi-level Converter Based VSC-HVDC

作　　者：方圆[1] 胡兆庆[1] 夏卫华[1] 

机构地区：[1]南京南瑞继保电气有限公司,江苏省南京市211111

出　　处：《智能电网》2016年第6期567-571,共5页Smart Grid

摘　　要：介绍模块化多电平换流器在柔性直流输电系统中应用的优点;对模块化多电平换流器数学模型分析后,设计适用于柔性直流运行的控制策略,对控制保护系统的硬件配置和控制系统功能配置进行描述;以实际工程参数作为搭建的动模系统原型参数,按照等比例缩小原则设计动模系统,利用控制保护和动模系统构成闭环测试系统,对控制保护系统方案及控制策略进行动模仿真验证,试验结果表明,桥臂模块电压控制较为均衡,稳态控制性能优异。Merit of modular multi-level converter applied to voltage source converter based high voltage direct current（VSC-HVDC） is introduced in this paper, mathematical model of modular multi-level converter is analyzed and control strategy suitable for VSC-HVDC is proposed based on the mathematical model. Hardware configuration and function configuration of the control and protection system are described. The dynamic physical model is built according to the scaling down principle based on the actual engineering. The protection and control platform and dynamic physical model are adopted to construct the closed-loop testing system. The scheme of control and protection system and control strategy is verified by using the dynamic physical model simulation system. The test results show that voltage control for the bridge arm module is more balanced and the steady-state control performance is good.

关 键 词：电压源换流器 模块化多电平换流器 控制策略 动模 

分 类 号：TM721.1[电气工程—电力系统及自动化]