数字式负序滤过器的不平衡输出

Unbalance Output of Digital Negative Sequence Strainer

对向量法和采样点计算法２ 种数字式负序滤过器进行研究。分析计算这２ 种方法在系统频率变化和振荡以及三相故障时的负序不平衡输出，为数字式负序滤过器的算法选择和继电保护中负序不平衡量的定值整定提供依据。

Two types of digital negative sequence strainers using vector method and sampling method are studied. The analysis and calculation on system frequency changing, oscillating and symmetrical fault offers reference for choosing arithmetic of digital negative sequence unbalance output in relay protection.