基于HCSR的252 kV、85 kA大容量短路电流 开断装置开断过程仿真

摘要

The technical scheme of 252 kV、85 kA short-circuit current breaking device is proposed.The device has two parallel connected branches, each branch consists of a 252 kV、63 kA SF6 breaker in series with a high coupled split reactor(HCSR).In order to study the current sharing and limiting characteristics of SF6 high pressure arc under the action of HCSR, the magnetofluid dynamics arc model of the device is established through the coupled split reactor and external circuit.The current sharing condition, current limiting condition, arc characteristic and interrupting process of the device are simulated and analyzed.According to the actual interrupting condition and calculation results, the factors influencing the device's current sharing and limiting characteristics are studied and the theory direction for its development and field application are provided.%提出了通过两台252 kV、63 kA SF6断路器分别串联高耦合分裂电抗器(high coupled split reactor,HCSR)后并联形成252 kV、85 kA短路电流开断装置的技术方案.为研究SF6高气压电弧在HCSR作用下的均流、限流特性,通过耦合分裂电抗器和外部电路,建立了短路电流开断装置的磁流体动力学电弧模型,对其并联均流工况、限流工况、燃弧特性及开断过程进行了仿真分析.根据实际开断情况和计算结果,对影响装置均限流特性的因素进行了分析研究,为252 kV、85 kA大容量短路电流开断装置研制及现场应用提供了理论指导.