基于动模仿真的混合级联直流输电系统控制策略  

Control strategy for hybrid cascaded direct current transmission system based on dynamic simulation

作　　者：常昊添 李建春[1] 赵文强[1] 侍乔明 CHANG Haotian;LI Jianchun;ZHAO Wenqiang;SHI Qiaoming(NR Electric Co.,Ltd,Nanjing 211102)

机构地区：[1]南京南瑞继保电气有限公司,南京211102

出　　处：《电气技术》2023年第1期50-59,64,共11页Electrical Engineering

基　　金：国家重点研发计划资助项目(2016YFB0900602);国家电网有限公司科技项目“白鹤滩—江苏±800kV特高压直流输电工程运行特性、控制保护策略研究及动模研制”(SGZB0000TGJS2200731)。

摘　　要：本文主要讨论混合直流输电系统中,整流侧采用常规换相换流器(LCC),逆变侧高阀采用常规LCC、低阀采用3个电压源换流器(VSC)并联的拓扑结构,此拓扑结构兼具LCC与VSC的优点。本文分析了混合直流输电系统中启停极、低阀组投退、VSC单阀投入、VSC交流电压故障的控制策略,给出了动模仿真系统的参数设计方法,最后通过仿真试验证明了控制策略的有效性。This paper mainly discusses the topology of a hybrid DC transmission system in which the conventional line-commuted converter(LCC) is used on the rectifier side, the conventional LCC is used on the high valve of the inverter side, and three voltage source converters(VSC) are used on the low valve of the hybrid DC transmission system. This topology has the advantages of both LCC and VSC. This paper analyzes the control strategies of start stop pole, low valve group on/off, VSC single valve incorporation, VSC AC voltage fault in hybrid DC transmission system, gives the parameter design method of dynamic simulation system, and finally proves the effectiveness of the control strategy through simulation tests.

关 键 词：模块化多电平换流器(MMC) 换相换流器(LCC) 混合直流输电系统 动模仿真系统 

分 类 号：TM721.1[电气工程—电力系统及自动化]