某火电厂6 kV浇注封母短路故障处理及结构优化研究

Case Study on Short-circuit Fault Handling and Structural Optimization of 6 kV Cast-resin Insulated Busway in a Coal Fired Plant

某火电厂6 kV浇注封母设计存在一定安全隐患,其防护罩及伸缩节结构无法满足南方沿海电厂户外长期运行要求。对6 kV浇注封母2次短路故障原因进行分析,提出相应的处理方案,尽快恢复母线运行,保证机组出力能力。对伸缩节结构进行优化研究,彻底解决浇注母线故障隐患,确保设备长期运行可靠性及机组出力稳定性。

There had been found certain hidden dangers in the design of the 6 kV cast-resin insulated busway of an actual thermal power plant,as its protective cover and expansion joint mechanism are inadequate for long-term outdoor operation under southern coastal environment.This paper reports the efforts made to maintain operation of the busway and ensure reliability and stability of the unit′s power output,which entailed analyzing the causes of twice short-circuit faults and conceiving potential solutions,with an emphasis on the study and implementation of structural optimization for the expansion joint mechanism.