南方电网技术2017，Vol.11Issue(6)：1-7,7.DOI:10.13648/j.cnki.issn1674-0629.2017.06.001
一种抑制高压直流输电换相失败的优化控制策略
An Optimal Control Strategy to Mitigate Commutation Failure of HVDC
摘要
Abstract
To reduce the probability of both commutation failure and continuous commutation failure in HVDC power transmission system, the main reasons causing commutation failure are analyzed, which include the voltage amplitude drop of commutation bus, direct current uprush and commutating voltage zero-cross phase shift.An optimal control strategy in which the extinction angle setting value can be adjusted dynamically considering zero-cross phase shift of commutation bus voltage at the inverter side and delayed trigger is allocated at the rectifier side is proposed.The influence of the optimal control strategy on system operating parameters is also analyzed.Based on the CIGRE benchmark model of HVDC, the proposed control strategy is developed in PSCAD/EMTDC.Simulation results show that the proposed optimal control strategy, to some extent, has the ability to mitigate the commutation failure and continuous commutation failure under single-phase and three-phase grounding fault conditions.Thus, the fault recovery performances of HVDC can be effectively improved.关键词
高压直流输电/换相失败/换相电压过零点偏移/整流侧滞后触发Key words
HVDC/commutation failure/zero-cross phase shift of commutating voltage/delayed trigger at the rectifier side分类
信息技术与安全科学引用本文复制引用
李春华,黄莹,李明,曹润彬..一种抑制高压直流输电换相失败的优化控制策略[J].南方电网技术,2017,11(6):1-7,7.基金项目
南方电网重点科技项目(WY-KJXM-20150907).Supported by the Science and Technology Project of China Southern Power Grid(WY-KJXM-20150907). （WY-KJXM-20150907）
