电力系统保护与控制2017，Vol.45Issue(4)：126-131,6.DOI:10.7667/PSPC160353
应对直流连续换相失败的紧急控制策略
An emergency control strategy coping with continuous commutation failure in DC system
摘要
Abstract
Continuous commutation failure of DC transmission system may cause transient instability in AC/DC interconnected power system.The main reason for transient instability is that continuous sudden-reduction of DC power under continuous commutation failure condition results in generator's cumulative acceleration area greater than deceleration area.The emergency control scheme for coping with the transient instability problem by security and stability control devices is proposed.The accumulative commutation failure time is adopted as instability criterion and matching variable of the generator tripping scheme.If continuous commutation failure whose duration is less than the blocking threshold value,the generator-tripping measures are adopted to prevent the instability,otherwise,the DC system blocking and generator-tripping measures are adopted simultaneously to ensure the stability.The effectiveness of this method is verified by the case of actual AC/DC interconnected power grid.关键词
连续换相失败/送端电网/紧急控制/切机方案Key words
continuous commutation failure/sending-end power grid/emergency control/generator tripping scheme引用本文复制引用
苏寅生,陈董秀,鲍颜红,姚海成,黄河,任先成..应对直流连续换相失败的紧急控制策略[J].电力系统保护与控制,2017,45(4):126-131,6.基金项目
南方电网公司科技项目“南方电网安全稳定综合防御系统建设与实施(二期)” （二期）
国家电网公司科技项目“计及受端电网约束的特高压直流外送大规模新能源发电送端电网调度运行关键技术研究与应用” （）
