Analysis and discussion of a dead-zone protection mal-operation case in Brazil

作     者：Dehui CHEN Yi XIA Wei LIU Salvatore MANTUANO 

作者机构：NARI Technology Co.LTDNanjing 210003China State Grid Brazil Holding S.A.Rio de Janeiro 20071-004Brazil 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2014年第2卷第1期

页      面：87-91页

核心收录：

学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：Brazilian power system Power system Relay protection device Dead-zone protection 

摘      要：A mal-operation case of busbar protection caused by a dead-zone protection abnormality in the Brazilian Midwest Grid on September 19th,2012,is briefly *** operation process of pilot distance,automatic re-closure,busbar differential and dead-zone protection,and the emphasis on the logic scheme of dead-zone protection are *** time delay between the breaker’s main pole and auxiliary contact during re-closure was the main cause in this case,and a defect in the logic allowed it to *** differences in dead-zone protection logic between Brazil and China are discussed.A test platform was constructed in the laboratory,and a site simulated experiment was also *** causes are suggested and test activities are carried out to verify *** show the values of practical engineering approaches to the *** also contributed to avoiding future mal-operations and strengthening the reliability of the protection system,and thus of the power supply in Brazil.