Adaptability of protection principle of converter protection in different protection areas

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Zhang, Hong-Yue^1 ; Shi, Yi^1 ; Chen, Hai-Long^1 ; Feng, Li-Hu^1

XJ Electric Limited by Share Ltd, Xuchang

461000, China^1

关键词: Converter protection;    Converter transformer protection;    Converter transformers;    Differential protection;    Operation and maintenance;    Protection configurations;    Protection principle;    Transformer differential protection;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/3/012017/pdf
DOI  :  10.1088/1755-1315/186/3/012017

来源: IOP

【 摘 要 】

This paper introduces a method to realize transformer differential protection. In a UHVDC transmission system, the converter transformer protection device adopts the dual configuration. Due to the lack of TA configuration, A set protection configuration of the converter protection device is complete, and B set protection configuration is incomplete.B set protection cannot achieve differential protection, zero sequence differential protection, winding differential protection and connection line differential protection. The two systems can not be completely duplex, which will affect the safe and stable operation of the converter and the daily operation and maintenance. In view of this phenomenon, this paper presents a new method to realize differential protection of converter transformer. The application of this method can solve B set problem of incomplete protection configuration. This method can be used for reference in field application.