Adaptability Analysis of Sampled Value Differential Protection in Bus with Double-Fed Wind Farm Entrance Line

Abstract

When there is a fault located in a bus with the incoming line of doubly-fed wind field, the short-circuit current will contain the weak feed, frequency offset and other fault characteristics of the double-fed wind farm. This will restrict the rapidity of differential protection of the bus sampled value to a certain extent. In this paper, a sampled value differential protection model in bus with doubly fed wind farm incoming lines is built based on RTDS simulation platform. Through simulation, it is proved that the adaptability of the sampled value differential protection in the background is poor.