引弧板对桥式双断点断路器灭弧性能的影响

发布时间：2019-01-08 20:38

【摘要】：合理的引弧板设计可以大幅度提升限流型断路器的开断性能。为此,针对桥式双断点断路器,对比分析了U形槽引弧板的U形槽位置和大小等对灭弧性能的影响。首先,设计了一个带卡住机构的桥式双断点断路器可拆式灭弧室样机,并通过3维有限元电磁仿真和多体动力学分析验证了样机的可行性。然后利用设计的实验样机,通过对比开断波形和开断特性参数,重点研究了3种不同引弧板结构对灭弧性能的影响。研究结果表明:在引弧板上增加U形槽可以增大动导电杆的电动斥力,且较大的U形槽作用更加明显;U形槽的引弧板有利于电弧拉长及进入栅片,增加U形槽后,电弧电压峰值提高了15 V,但是U形槽嵌入栅片容易造成弧根进入栅片后又重新转移到动导电杆上,不利于电弧在栅片中稳定燃烧。研究结果可为断路器的设计提供参考。
[Abstract]:Reasonable arc board design can greatly improve the on-off performance of current limiting circuit breaker. For this reason, the influence of the position and size of U-groove on the arc extinguishing performance of the U-groove arc plate is compared and analyzed for the bridge type double-break point circuit breaker. Firstly, a prototype of the detachable arc-extinguishing chamber of the bridge double-breakpoint circuit breaker with clamping mechanism is designed, and the feasibility of the prototype is verified by three-dimensional finite element electromagnetic simulation and multi-body dynamics analysis. Then the influence of three kinds of arcing plate structures on the arc extinguishing performance is studied by comparing the breaking waveform and breaking characteristic parameters with the designed experimental prototype. The results show that the electric repulsion force of the dynamic conducting rod can be increased by increasing the U-shaped groove on the arc starting plate, and the larger U-shaped groove is more obvious. The arcing plate of U-groove is advantageous to the arc lengthening and entering the gate, the peak value of arc voltage increases by 15V after increasing the U-groove, but the U-groove embedded gate is easy to cause the arc root to enter the grid and then transfer to the dynamic conductive rod. It is unfavorable for the arc to burn stably in the gate. The results can provide reference for the design of circuit breaker.
【作者单位】：西安理工大学理学院;西安交通大学电力设备电气绝缘国家重点实验室;
【基金】：国家自然科学基金(51507136)~~
【分类号】：TM561

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