自能式多断口灭弧装置熄灭直流电弧试验研究

直流配网是未来电网的发展方向,但是直流配网防雷形势依旧严峻,不容乐观。文章研究了一种自能式多断口灭弧装置,简述了装置的灭弧原理,分析了自能式多断口灭弧装置熄灭直流电弧机理,论证了“冲击疏导-快速灭弧-阻断重燃”的自能式熄弧方法可快速熄灭闪络后的直流电弧。在直流电弧灭弧试验中,灭弧装置可在3 ms时间内全概率熄灭幅值为0.8 kA直流电弧,并阻断电弧重燃,达到良好的灭弧效果。研究验证了自能式多断口灭弧装置熄灭直流电弧的可行性,为未来装置实际挂网运行提供了重要研究基础。

Experimental study on DC arc extinction by self energy multi break arc extinguishing device

DC distribution network is the development direction of power grid in the future, but the lightning protection situation of DC distribution network is still grim and not optimistic. This paper studies a kind of self energy multi fracture arc extinguishing device, describes the arc extinguishing principle of the device, analyzes the DC arc extinguishing mechanism of the self energy multi fracture arc extinguishing device, and demonstrates that the self energy arc extinguishing method of "shock conduction quick arc extinguishing block reignition" can quickly extinguish the DC arc after flashover. In the DC arc extinction test, the arc extinguishing device can extinguish the DC arc with the amplitude of 0.8kA within 3ms, and block the re ignition of the arc to achieve a good arc extinction effect. The feasibility of DC arc extinguishing by self energy multi break arc extinguishing device is verified, which provides an important research basis for the actual operation of the device in the future.