VOLTAGE SOURCE CONVERTER BASED DIRECT CURRENT DEICER AND CONTROLLING METHOD THEREOF

摘要

A voltage source converter based DC deicer and its control method are provided. The voltage source converter based DC deicer includes a connecting reactor, a modular multilevel voltage source converter based on a full H-bridge submodule, smoothing reactors, deicing disconnectors, a deicing bus, and a deicing AC line. The AC side of the modular multilevel voltage source converter is connected to an AC side bus through the connecting reactor, an isolation disconnector and a breaker. The DC side of the modular multilevel voltage source converter is connected to the deicing AC line through the smoothing reactors, the deicing disconnectors, and the deicing bus.

主权项

1. A voltage source converter based direct current (DC) deicer, comprising:
a connecting reactor; a modular multilevel voltage source converter based on a full H-bridge submodule and having an alternative current (AC) side and a DC side; first and second smoothing reactors; first, second, third and fourth deicing disconnectors; a deicing bus having a phase-A, a phase-B and a phase-C; and a deicing AC line having a phase-A, a phase-B and a phase-C; wherein one end of the connecting reactor is connected to an AC side bus through an isolation disconnector and a breaker connected in series, and the other end of the connecting reactor is connected to the AC side of the converter; the DC side of the converter is connected to one end of each of the first and second smoothing reactors; the other end of the first smoothing reactor, one end of the first deicing disconnector and one end of the second deicing disconnector are connected to one another; the other end of the second smoothing reactor, one end of the third deicing disconnector and one end of the fourth deicing disconnector are connected to one another; the other end of the first deicing disconnector is connected with one end of the phase-A of the deicing bus; the other end of the second deicing disconnector, the other end of the third deicing disconnector and one end of the phase-B of the deicing bus are connected to one another; the other end of the fourth deicing disconnector is connected with one end of phase-C of the deicing bus; the other end of the phase-A of the deicing bus is connected with one side of the phase-A of the deicing AC line, the other end of the phase-B of the deicing bus is connected with one side of the phase-B of the deicing AC line, the other end of the phase-C of the deicing bus is connected with one side of the phase-C of the deicing AC line; and the other ends of the phase-A, the phase-B and the phase-C of the deicing AC line are connected together.