THYRISTOR ASSISTED ON-LOAD TAP CHANGER AND METHOD THEREOF

摘要

A terminal I thereof is respectively connected with transition switches, and a terminal II is respectively connected with transition switches; the other terminals of the transition switches are jointly connected and are connected with the terminal through a saturable reactor and a thyristor switch; the other terminals of the transition switches are jointly connected and are connected with the terminal through a linear reactor, a saturable reactor and an overvoltage triggering thyristor circuit; an odd-numbered side main contact is respectively connected with the terminal I and a common terminal, and an even-numbered side main contact is respectively connected with the terminal II and the common terminal; the terminals of non-common terminals of a main path and a transition path are further connected with a bidirectional voltage stabilizing circuit.

主权项

1. A thyristor assisted on-load tap changer, comprising a main path and a transition path, wherein the main path is composed of a switch K1, and the transition path is composed of a linear reactor L1, a saturable reactor L2 and an overvoltage triggering thyristor circuit, which are connected in series; one end of the switch K1 is switched between a tap selector terminal I and a tap selector terminal II through a change-over switch K5, and one end of the linear reactor L1 is switched between the tap selector terminal I and the tap selector terminal II through a change-over switch K6; the switch K1 and the other end of the overvoltage triggering thyristor circuit are connected with a common terminal.