牵引变电所微机主变压器保护动作行为统计与对策研究

在对牵引变电所微机主变压器保护动作行为统计分析的基础上，得到主变压器保护不正确动作的原因，并提出相应解决对策：技术人员加强理解牵引主变压器保护原理和进行保护的合理整定；增加差动保护判别电流互感器饱和功能；对牵引变电所互感器的变比进行校核，并对保护整定值进行校验；减少微机保护装置二次回路接线等。

Statistics and Countermeasures of Protection on Microprocessor Main Transformer of Traction Substation

On the basis of statistics and analysis on microprocessor main transformer protection of traction substation, know reasons of failure protection on micro-processor of the main transformer of traction substation, as to propose appropriate countermeasures： technicians enhance understanding of principles of traction main transformer protection and setting reasonable protection; increase discriminant current transformer＇s saturation function of differential protection; check transformation ratio of traction substation＇s transformer, as to verify protection＇s numerical size of setting; reduce secondary circuit wiring of micro-processor protection devices, etc.