南方电网技术2017，Vol.11Issue(7)：11-18,8.DOI:10.13648/j.cnki.issn1674-0629.2017.07.003
LCC-MMC三端混合直流输电系统整流站交流故障穿越协调控制策略
Rectifier Side AC Fault Ride-Through Coordination Control Strategy for Three-Terminal LCC-MMC Hybrid HVDC System
时伯年 1洪潮 2张野 2杨健 2孙刚1
作者信息
- 1. 北京四方继保自动化股份有限公司,北京100085
- 2. 直流输电技术国家重点实验室(南方电网科学研究院),广州510663
- 折叠
摘要
Abstract
For the three-terminal line commutated converter-modular multilevel converter ( LCC-MMC) hybrid DC transmission sys-tem, the DC transmission power reducing or interrupting problem caused by AC side fault at the rectifier station is studied.And an AC fault ride-through coordination control strategy for rectifier converter station is presented.Firstly, the mathematical models of different types of converters are established and the characteristics after AC system faults are analyzed.Secondly, according to the different op-eration modes and the fault characteristics of DC voltage decrease and DC line contain 100 Hz harmonic, the coordination control strat-egy between the minimum trigger angle control at rectifier side and the maximum modulation ratio control at converter side is pro-posed.Thirdly, the original 100 Hz protection values are changed then the control modes can be switched automatically without sta-tions communication .Finally, a hybrid DC transmission system model is established in PSCAD/EMTDC, and the control characteris-tics of the system under different working conditions are simulated and analyzed.Results show that the proposed control strategy can improve the transmission power of the DC system and reduce the probability of power transmission interruption when short curcuit fault occurs at the rectifier AC side.关键词
多端直流输电/混合直流输电/故障穿越/功率续传/协调控制策略Key words
multi-terminal HVDC/hybrid HVDC/fault ride-through/power continuity/coordination control strategy分类
信息技术与安全科学引用本文复制引用
时伯年,洪潮,张野,杨健,孙刚..LCC-MMC三端混合直流输电系统整流站交流故障穿越协调控制策略[J].南方电网技术,2017,11(7):11-18,8.
