新型电力变压器混合式有载分接开关的仿真分析

Simulation of New Power Transformer Hybrid On-load Tap Changer

变压器在整个煤矿电力网络的调压中占有重要地位,有载分接开关是变压器中唯一可以移动部分,有载分接开关在调压的过程中产生电弧,电弧对煤矿电力网络造成重大的影响,所以消除电弧尤为重要。对现有的有载分接开关进行了分析,在微电弧触发式的双电阻过渡支路的有载分接开关基础上,基于PSCAD建立以有源触发配合双电阻过渡支路的新模型。仿真结果表明,新模型更可靠,更稳定。

The transformer plays an important role in the colliery electricity network, the on-load tap changer is the only moving part of the transformer,on-load tap changer will produce arc in the regulating process,the colliery electricity network will be seriously influenced by the arc,so it is particularly important to eliminate the arc. The existing on load tap were analyzed in this paper, the new model of on-load tap changer, which take active trigger to coordinate the transitional branch, is built by PSCAD, which is based on the on-load tap changer that take micro-arc to trigger thyristors.The results of simulation show that the new model is more reliable and stable.