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Issue:
Improvement measures of 100 Hz protection in China Southern Power Grid
Author(s):
ZHOU Hong-yang
,
YU Jiang
,
HUANG Jia-yin
,
ZHAO Man-yong
,
YANG Jin-bai
Pages:
96
-
100
Year:
2007
Issue:
12
Journal:
ELECTRIC POWER AUTOMATION EQUIPMENT
Keyword:
高压直流输电
;
100Hz保护
;
负序电压
;
反时限
;
Abstract:
为减小交流系统故障期间直流100 Hz保护动作的概率,利用PSCAD/EMTDC仿真分析软件,就阀故障和交流系统故障时直流线路50 Hz/100 Hz电流特性进行了分析,研究了提高保护定值或延长保护动作延时、采用反时限特性、利用附加判据区分交流故障和阀故障、调整直流100 Hz保护配置原则4种措施的可行性、使用后的效果及局限性.提出100 Hz保护主要作为交流系统故障的后备保护,动作时间与交流系统故障清除时间相配合的原则.推荐的改进方案已用于天广、高肇、兴安直流工程.
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