10kV多断点灭弧防雷间隙熄弧特性研究及应用

发布时间：2018-11-24 08:19

【摘要】：为了研究10 kV电压等级多断点灭弧防雷间隙的熄弧特性,采用Fluent软件对高速气流耦合电弧过程进行了仿真分析。同时搭建了试验回路并进行了灭弧试验,通过高速摄像机观察了电弧熄灭过程,并且利用示波器采集了灭弧波形。仿真结果表明:电弧在高速气流作用下被分段,切断电弧能量补给通道,电弧温度急剧下降,最终电弧熄灭。试验结果表明:10 kV电压等级多断点灭弧间隙具有良好的熄弧特性,能在0.3 ms时间内熄灭工频电弧并且在后续时间内电弧未发生重燃。实际运行结果表明:多断点灭弧防雷间隙在实际安装运行中能有效降低雷击跳闸次数以及抑制工频电弧发展。仿真结果、试验结果及实际运行结果一致证明了多断点灭弧防雷间隙能够快速、有效地熄灭电弧,抑制工频电弧重燃。
[Abstract]:In order to study the characteristics of lightning extinguishing gap of 10 kV voltage grade multi-break point arc extinguishing, the high speed airflow coupled arc process was simulated and analyzed by Fluent software. At the same time, the test circuit is set up and the arc extinguishing test is carried out. The arc extinguishing process is observed by high speed camera, and the arc extinguishing waveform is collected by using oscilloscope. The simulation results show that the arc is segmented under the action of high velocity airflow, and the arc energy supply channel is cut off, the arc temperature drops sharply, and the arc finally extinguishes. The experimental results show that the multi-break arc extinguishing gap of 10 kV voltage level has good arc extinguishing characteristics and can extinguish the power frequency arc in 0.3 ms time and no reburning occurs in the subsequent time. The practical operation results show that the multi-break arc interrupter gap can effectively reduce the lightning tripping times and restrain the development of the power frequency arc in the actual installation operation. The simulation results, the experimental results and the actual operation results show that the multi-break arc extinguishing lightning gap can extinguish the arc quickly and effectively, and restrain the reburning of the power frequency arc.
【作者单位】：广西大学电气工程学院;国网浙江省电力公司绍兴供电公司;
【基金】：国家自然科学基金(51467002)~~
【分类号】：TM863

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