提高500kV变压器过负荷能力的研究

Research on enhancement of overload capacity for 500 kV transformer

介绍大型变压器负载的类型、超负载运行的限值和绕组热点温度的计算 ,计算了按变压器自身热特性的正常周期性和事故性过负荷能力 ,并提出了变压器过负荷能力的计算方法和事故过负荷的运行要求。

The load types,the overload limit-value during operation and the calculation of hot spot temperature of winding of large transformer were introduced.According to the thermal characteristic of the transformer,the normal cyclic overload capacity and the accidental overload capacity were calculated respectively.The calculation method of transformer's overload capacity was put forward,as well as the operation requirement for overload during accidents.