Study of Transformer Differential Protection Based on Self-adaptive Biased Characteristic Curve
For the conventional biased characteristic differential criterion based on a fixed predetermined characteristic curve, it is difficult to improve both reliability and sensitivity of transformer differential protection. To solve this problem, the comparative analysis of operation trajectories of protection is conducted in this paper. According to the differences among operation trajectories under various operating conditions, a novel self-adaptive protection scheme is presented. The new scheme adopts the means of variable characteristics, utilizing different characteristic curves to cope with different operation conditions. Simulation tests results based on RTDS show that the proposed scheme provides a high sensitivity for internal faults, while retaining a high reliability for all external faults. Protection apparatuses based on the proposed scheme have been developed and performed well in actual.
Reliability Self-adaptive protection Sensitivity Transformer differential protection
Shaofeng Huang Shanshan Li Hongming Yin Yuanqing Xiao Liang Zhang Junlei Zhao
College of Electrical and Electronic Engineering,North China Electric Power University; Beijing Sifa College of Electrical and Electronic Engineering,North China Electric Power University SGCC Northeast China Branch Beijing Sifang Automation Co.,Ltd.
国际会议
西安
英文
1-5
2016-09-01（万方平台首次上网日期，不代表论文的发表时间）