电力电子技术在有载分接开关中应用研究

机电混合式有载分接开关在抑制燃弧功率、降低过渡损耗等方面,成为优化机械式有载分接开关性能的解决方案。为深刻理解机电混合式有载分接开关工作原理,验证控制策略的可行性,进行了多仿真平台研究。分别建立了基于Matlab的离线仿真、基于dSPACE的半实物仿真及基于Matlab/dSPACE/RTDS的实时仿真模型,对切换开关时序及功率器件控制策略进行了仿真计算。分别搭建了常规基于过渡电阻的有载分接开关样机以及基于晶闸管的机电混合式有载分接开关试验样机,通过对比测试结果,机电混合式拓扑结构可有效抑制电弧,过渡损耗约为常规开关损耗的1/20,并可辨识各开关动作位置,与仿真结果具有一致性。

Study on Power Electronics Application in On-load Tap Changer

Electromechanical hybrid on-load tap changer is a solution to optimize the performance of mechanical on-load tap changer in the field of arc power suppression and transition loss reduction.In order to deeply understand the working principle of electromechanical hybrid on-load tap changer and verify the feasibility of the control strategy,a multi-simulation platform was studied.The off-line simulation based on Matlab,semiphysical simulation based on dSPACE and real-time simulation model based on Matlab/dSPACE/RTDS were established respectively,and the divertering switch timing and power device control strategy were simulated and calculated.The prototype of the conventional on-load tap changer based on transition resistance and the electromechanical hybrid on-load tap changer based on thyristor were respectively set up.By comparing the test results,the electromechanical hybrid topology structure can effectively suppress the arc,the transition loss is about 1/20 of the conventional switching loss,and identify the action position of each switch,which is consistent with the simulation results.