基于MMC的柔性直流输电换流阀试验系统设计  

Design of the Test System of Converter Valve for Flexible DC Transmission Based on MMC

作　　者：刘静一 董朝阳 吉攀攀[1,2] 杨丰源 LIU Jing-yi;DONG Chao-yang;JI Pan-pan;YANG Feng-yuan(XJ Electric Ltd.,Xuchang 461000,China)

机构地区：[1]许继电气股份有限公司,河南许昌461000 [2]许继集团有限公司,河南许昌461000

出　　处：《电力电子技术》2021年第6期25-28,共4页Power Electronics

基　　金：河南省重大科技专项(191110210900)。

摘　　要：换流阀是柔性高压直流输电工程中完成电能变换的核心模块,其运行可靠性直接关系到整个直流输电系统的稳定性,因此需对换流器阀进行严格的型式试验。运行试验是型式试验的重要一环,主要检测换流阀对电流、电压和温度应力的耐受情况。依据模块化多电平换流器(MMC)型电压源换流阀实际工程运行工况,采用等效试验的方法,设计了一种基于MMC的柔性直流输电换流阀试验系统,可对换流阀的稳态工况和暂态工况进行模拟,进而实现对换流器阀的导通、关断和有关电流特性的检验。详细介绍了基于MMC的柔性直流输电换流阀试验系统的主回路和控制系统设计,并以实际工程换流阀组件为试验对象,验证了所设计的基于MMC柔性直流输电换流阀试验系统的正确性和实用性。The converter valve is core module to complete power conversion in the flexible high-voltage DC transmission project.Its operational reliability is directly related to the stability of the entire direct current(DC)transmission system.Therefore,the converter valve needs to be strictly type tested.The operation test is an important part of the type test,which mainly detects the resistance of the converter valve to current,voltage and temperature stress.According to the actual engineering operating conditions of the modular multi-level converter(MMC)voltage source converter valve,an equivalent test method is adopted to design a MMC-based flexible DC transmission converter valve test system,which can realize the steady-state operating condition of the converter valve simulate with transient working conditions,and then realize the inspection of the on,off and related current characteristics of the converter valve.The main circuit design and control system design of the MMC-based flexible DC transmission converter valve test system are introduced in detail,and the actual engineering converter valve is assembly taken as the test object to verify the correctness and practicability of the designed MMC-based flexible DC transmission converter valve test system.

关 键 词：柔性直流输电 换流阀 模块化多电平换流器 

分 类 号：TM721.1[电气工程—电力系统及自动化]