1)positive sequence filter,正序过滤器2)positive sequence voltage filter,正序电压滤过器3)Negative Sequence Strainer,负序滤过器4)sequence filter,相序滤波器，相序过滤器5)negative-sequence voltage filter,负序电压滤过器6)sequence component filter,序分量滤过器
用法例句
The methods overcome the shortcoming that time constant is greater and filtering result is affected by frequency variation for a analogue positive sequence voltage filter.
