关于某电厂发变组保护合理化配置的研究

The Research about Rational G-T Unit Protection Configuration of a Power Plant

针对某600 MW电厂发变组保护设计的实际情况和运行工况,提出了原工程保护设计方案与继电保护规程、国家电网继电保护标准化设计规范、反措要求的不符之处,并通过短路计算分析等方法研究了励磁变差动保护、发电机定子绕组95%接地保护、主变差动保护用电流互感器的选型、发变组过激磁保护存在的问题,给出这些问题实际工程设计的解决方案,从而对发变组保护的配置进行优化。

According to the actual condition and operation situation of a plant generationtransformer unit protection design,the discrepancy is analyzed between original engineering protective design protective regulations,national grid standardized design,anti-accident measure.Existent problems are studied of excitation transformer differential protection,95% stator earth fault protection and selection of CT of main transformer differential protection,G-T unit over excitation protection by short-circuit calculation methods.Finally the design solution is given and G-T unit protection configuration is optimized.