This paper analyzes the causes of the malfunction of the on-load switch in the arc-suppression coil.It points out that the main causes are the large deviation of the Fe-Cr-Al damping resistance in the arc-suppression coil and the defects of the locking program of the shift controller.In order to reduce the malfunction rate of the on-load switch of the arc-suppression coil,it suggests replacing the Fe-Cr-Al damping resistance with the Ni-Cr one and adding a voltage blocking module to the power circuit of the on-load switch shifting motor.The above two measures are applied to 116 sets of arc-suppressing coil devices in the substation of a power company in Chongqing,and the operating results show that they can effectively avoid the malfunction of the on-load switch of the arc-suppressing coil and further improve the reliability of power supply of the grid.
维普
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