高电压技术2017，Vol.43Issue(4)：1106-1113,8.DOI:10.13336/j.1003-6520.hve.20170328006
基于临界短路比的VSC-HVDC接入弱交流系统的运行特性
Operation Characteristics of VSC-HVDC Links Connected to Weak AC Systems Based on Critical SCR
摘要
Abstract
High-voltage direct current transmission based on voltage-source converter(VSC-HVDC) transmission doesn't rely on receiving end to provide commutating current.VSC-HVDC links can access in weak alternative current (AC) systems.However,operation characteristics that VSC-HVDC links access to weak AC systems need to be studied.Consequently,we established mathematical models of actual weak power systems and VSC-HVDC links.From view of max transmission power,we analyzed influence factors that restrict VSC-HVDC links to access in weak AC systems.Combined with power flow equations in AC side and stable operation condition,theoretical critical SCR that VSC-HVDC transmission accesses to weak AC power network was obtained.Moreover,theoretical analysis was verified in BPA software.The simulation results demonstrate that the proposed measures should be taken if receiving ernd's SCR is less than 1.4 to ensure systerms stablility.The results can provide the theoretical guidance for VSC-HVDC industrial application access to weak AC power grid in actual projects.关键词
VSC-HVDC/弱交流系统/最大输送功率/临界短路比/运行特性/暂态稳定Key words
VSC-HVDC/weak AC systems/max transmission power/critical SCR/operation characteristics/transient stability引用本文复制引用
王银顺,李潇潇,张鑫..基于临界短路比的VSC-HVDC接入弱交流系统的运行特性[J].高电压技术,2017,43(4):1106-1113,8.基金项目
国家电网公司项目(XT71-15-048).Project supported by Science and Technology Project of SGCC (XT71-15-048). （XT71-15-048）
