负荷对接地故障转移消弧技术的影响

Effects of load on arc-suppression technology based on grounded-fault transfer device

为了分析负荷对接地故障转移消弧技术的影响,提出了一种接地故障转移消弧技术等效模 型。利用该模型对接地故障转移消弧装置的电流转移性能和恢复电压抑制能力进行了研究,给出了接 地故障转移消弧技术受负荷影响的规律。研究结果表明:接地故障转移消弧装置的电流转移性能受负 荷影响较大,在大负荷、小接地电阻的情况下可能出现不能转移故障点电流的情况,甚至有增大故障 点电流的可能;故障转移消弧装置对恢复电压有较强的抑制能力,且受负荷的影响较小。研究结果为 接地故障转移消弧装置控制方法的改进提供了理论依据。

In order to analyze the effects of load on arc-suppression method based on grounded-fault transfer device,an equivalent model of the arc-suppression method was proposed in this paper. The performance for transferring fault current and the capacity for controlling recovery voltage of the transfer device were studied through using the proposed model,and the laws of the arc suppression method affected by load was given. The research results show that it has a great effect by load on the performance for transferring fault current. In the case of large load and small ground resistance,it is possible that the fault current cannot be transferred,or even the fault current can be increased. In addition,the analysis results indicate that the ground fault transfer device has a strong ability to restrain the recovery voltage,and is less affected by the load. The research results provide a theoretical basis for improving the arc suppression control method based on groundedfault transfer device.