电网技术2011，Vol.35Issue(2)：17-24,8.
交流电网强度对模块化多电平换流器HVDC运行特性的影响
Influence of AC System Strength on Operating Characteristics of MMC-HVDC System
摘要
Abstract
High voltage DC (HVDC) transmission based on modular multilevel converter (MMC) is a new type of HVDC transmission technology based on voltage source converter (VSC). Taking mathematical relationship of the exchanged power between the AC system and the converter station into account, the influence of AC system strength on steady state characteristics of MMC-HVDC is analyzed by graphic method, meanwhile the transient characteristics of HVDC system connected to strong/weak AC system are analyzed while the setting values of the different converter control modes are changed. Analysis results show that the strength of AC system as well as the influence of converter control modes on operating characteristics of MMC-HVDC system can be reflected by the size of power circle and its relative position visually. The correctness of above-mentioned conclusion is verified by the results of the simulation based on PSCAD electromagnetic transient model.关键词
高压直流输电/模块化多电平换流器/功率圆/运行特性/交流电网强度Key words
HVDC power transmission/ modular multilevel converter (MMC)/ power circle/ operational characteristics/ AC system strength分类
信息技术与安全科学引用本文复制引用
王姗姗,周孝信,汤广福,贺之渊,杨晓楠,何维国,刘隽..交流电网强度对模块化多电平换流器HVDC运行特性的影响[J].电网技术,2011,35(2):17-24,8.基金项目
国家自然科学基金项目(50777058). （50777058）
