开关关合速度和短路关合能力计算分析

Calculation and Analysis of Switch Closing Speed and Short-Circuit Closing Capacity

短路关合能力是开关的一项重要性能指标。分析影响开关短路关合能力的主要因素,采用有限元仿真和计算公式相结合的方法,对开关的关合速度和关合能力进行理论计算分析。最后,通过DC 70 kA短路关合能力试验,验证了开关设计及其关合能力计算分析的可行性,具有重要的工程意义。

Short-circuit closing capacity is an important performance of the switch.The main factors of affecting the short-circuit closing capacity are analyzed.With the method of electro-magnetic simulation and calculation formula,the closing speed and short-circuit closing capacity of the switch are calculated and analyzed.Finally,the feasibility of the design and calculation analysis is verified by the short-circuit closing capacity test of DC 70 kA,which has a great engineering significance.