电力建设2017，Vol.38Issue(7)：123-130,8.DOI:10.3969/j.issn.1000-7229.2017.07.015
基于复合移相控制的直流输电系统换相失败响应优化研究
HVDC Commutation Failure Response Optimization Based on Compound Phase-Shifting Control
摘要
Abstract
At present, the main control strategies for the domestic HVDC projects are ABB strategy and SIEMENS strategy.This paper analyzes the difference of these two strategies on dealing with commutation failure.It is pointed out that commutation failure with SIEMENS strategy lasts longer than that with ABB strategy, for the reason that SIEMENS strategy still relies on PI (proportional and integral) regulation during inverter AC fault period and its response speed is quite slow compared to the decreasing rate of extinction angle;whereas this regulation has its advantages that it improves the accuracy of extinction angle in steady operation.Then a compound phase-shifting control is proposed based on the SIEMENS strategy, including the phase-shifting control strategy considering the rising rate of DC current as wells as the phase-shifting control strategy considering both unbalance and magnitude of AC voltage.Finally, we present the detailed parameters of the proposed controller.The simulation results show that the application of the compound phase-shifting control contributes to preventing commutation failure or shortening its duration, as well as improving power recovery and system response during fault period, compared with original control strategy.关键词
直流输电/换相失败/复合移相控制/直流电流/交流电压Key words
DC transmission/commutation failure/compound phase-shifting control/DC current/AC voltage分类
信息技术与安全科学引用本文复制引用
陆韶琦,王世佳,侯玉强,刘福锁,徐政..基于复合移相控制的直流输电系统换相失败响应优化研究[J].电力建设,2017,38(7):123-130,8.基金项目
国家电网公司科技项目(特高压直流连续换相失败、再启动工况下安全稳定控制技术研究) （特高压直流连续换相失败、再启动工况下安全稳定控制技术研究）
