Portable DC ice melting power supply device for distribution line

Abstract

The invention relates to a portable DC ice melting power supply device for a distribution line, which comprises a gasoline generator, a three-phase full-wave rectifier, a filtering circuit, a switching power supply, a voltage and current detecting circuit, a DC output voltage end, a controlling and protecting circuit and an auxiliary power supply. The switching power supply comprises a commutating capacitor, an overvoltage protector, an insulated gate bipolar transistor, an intermediate-frequency transformer and a rectifier device. According to the portable DC ice melting power supply device, an intermediate-frequency gasoline generator is assembled with the switching power supply; the insulated gate bipolar transistor with a switching frequency of 20-30kHz is adopted so that the weight of the portable DC ice melting power supply device for the distribution line is reduced to less than 90kg, and the volume is reduced to less than 1.1*0.4*0.5m<3>. The bottom of the portable DC ice melting power supply device is provided with rollers. The portable DC ice melting power supply device is suitable for carrying and transportation by two persons in a mountainous area, and furthermore can be conveniently and manually carried to an area which is inconvenient in transportation for performing ice melting on the distribution network, thereby improving safe operation level of the distribution network.

Description

technical field [0001] The invention relates to the field of electric power transmission, in particular to a DC power supply ice-melting power supply method and device. It is mainly used for ice-melting treatment when the existing distribution lines are covered with ice. Background technique [0002] In Guangxi, Guizhou, Hunan and other regions in southern China, transmission lines are prone to ice-covered disasters in winter, causing large-scale power outages. Among the ice-covered disasters, the distribution network lines are widely distributed, and most of them are located in micro-terrain areas, so they are more susceptible to the impact of freezing disasters. For example, during the ice disaster in southern China in 2008, a large number of transmission lines in the distribution network were downed and disconnected. The total number of downed poles exceeded hundreds of thousands of bases and more than 300,000 disconnected lines, which caused power supply interruptions f...

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