摘要
本文利用公式推导了电力系统瞬时功率在三相幅值不平衡、三相相角不平衡情况下的表达式,并进行了验证,分析了三相不平衡时对功率振荡分析的影响。提出了利用负序闭锁特定频率功率振荡的频谱,避免功率振荡的误报。
This paper presents an analysis of the instantaneous power expressions for a three-phase power system under conditions of amplitude and phase angle imbalance.Derivations of these expressions are shown and validated with formulas.Additionally,this paper examines the effect of three-phase imbalance on power oscillation analysis.To prevent false alarms of power oscillation,the negative sequence is implemented to block power oscillation at specific frequency spectrums.
作者
李培宜
陈贻骜
LI Peiyi;CHEN Yi’ao(Nanjing Sac Automation Co.,Ltd.,Nanjing,Jiangsu 211106,China)
出处
《自动化应用》
2023年第8期53-55,共3页
Automation Application
关键词
三相不平衡
功率振荡
误报
three phase unbalance
power oscillation
false alarm
