Reusable direct-current ice melting device

The invention discloses a reusable direct-current ice melting device which is formed by connecting a first full-controlled pulse width modulation rectifier (1), a second full-controlled pulse width modulation rectifier (2), a first uncontrollable rectifier (3), a second uncontrollable rectifier (4), a first three-winding rectifier transformer (5), a second three-winding rectifier transformer (6), a first single-phase isolating switch (7), a second single-phase isolating switch (8), a third single-phase isolating switch (9) and a three-phase circuit breaker (10). The device has the advantages that (1) the voltage can be continuously regulated in a direct-current ice melting mode, the device can operate in an electric energy quality regulation mode when an electric transmission line is not covered by ice, the electric energy quality is improved, and the utilization rate is improved; (2) the cost is greatly reduced; (3) the ice melting requirements of electric transmission lines of different lengths and different currents can be met; (4) the reusable direct-current ice melting device has the advantages of low cost and high performance.