Research on on-line ice-melting technology based on zero sequence reactance integrated device

In this paper, the grounding transformer is matched with the adjustable reactor, and the zero-sequence loop is formed by the lightning protection line. The intelligent switching of the knife gate is used to realize the flexible switching between the melting ice state and the non-melting ice state. When melting ice, switch to online melting ice. The device realizes the continuous adjustment of the melting current by adjusting the gear position of the adjustable reactor; during the non-melting ice, switching to the neutral point non-effective grounding system does not affect the original power grid structure, and at the same time melting the ice During operation, it does not affect the voltage and current on the load side, thus achieving a new idea of non-stopping and melting ice.