1000 kV特高压变压器结构及调压补偿原理

The structure of 1 000 kV UHV transformer and the principle of voltage regulation compensation

对1 000 kV特高压变压器的特点进行了全面的分析.分析了特高压变压器采用单相自耦变压器方式,是因为考虑了变压器的体积、造价及可靠性,介绍了特高压变压器中分箱体独立设置调压补偿变压器的原因,解释了采用中性点无励磁调压方式的原因,重点介绍了调压补偿原理并分析了各挡位下的调压效果,对比说明低压补偿的显著作用,为1 000 kV特高压变压器的安全稳定运行提供了参考意见.

The paper analyzed the characteristics of 1 000 kV UHV transformer. Considering the size, cost and reliability of UHV Transformer, it is necessary to adopt a single-phase autotransformer. The structure of 1 000 kV UHV autotransformer is introduced. The voltage regulating compensation transformer is separately installed in UHV Transformer and the necessity of adopting neutral excitation voltage regulation mode for voltage regulating compensation transformer. The principle of voltage regulation compensation is introduced, and the voltage regulation effect under different transmission conditions is analyzed. The comparison shows that the significant effect is seen from low voltage compensation. It provides reference for safe and stable operation of 1 000 kV UHV transformer.