南方电网技术2017，Vol.11Issue(5)：17-23,7.DOI:10.13648/j.cnki.issn1674-0629.2017.05.003
用于减少换相失败持续时间的直流附加控制策略
DC Additional Control Strategy for Reducing Commutation Failure Duration
摘要
Abstract
Commutation failures are prone to occur in the HVDC projects where the inverter station connects to a weak AC system and severely affects the safety of the power grid.It becomes an urgent requirement of these HVDC projects to improve the control strategy of HVDC,thereby suppress the occurrence of commutation failure as well as improve the fault recovery characteristics.In this paper,an additional control strategy is proposed to reduce the duration of commutation failure.In the proposed control strategy,a PI controller is designed to establish the relationship between the DC current rate and the extinction angle,which increases both the extinction angle and the rate of DC current during the fault,thus reduces the duration of commutation failure and improving the recovery characteristics of the DC system after the fault.The validity of the proposed control strategy is verified by the PSCAD simulation of the actual model of Guanvinvan HVDC proiect.关键词
换相失败/直流附加控制策略/电网换相换流型高压直流输电/弱交流系统Key words
commutation failure/DC additional control strategy/LCC-HVDC/weak AC system分类
信息技术与安全科学引用本文复制引用
侯灵犀,李春华,舒德兀,曹润彬,李明,张春朋,姜齐荣..用于减少换相失败持续时间的直流附加控制策略[J].南方电网技术,2017,11(5):17-23,7.基金项目
南方电网公司重点科技项目(WY-KJXM-20150907).Supported by the Science and Technology Project of China Southern Power Grid (WY-KJXM-20150907). （WY-KJXM-20150907）
