High-voltage direct current power supply applied to dust removal system

Abstract

The invention relates to a high-voltage direct current power supply applied to a dust removal system. The high-voltage direct current power supply comprises a converter and a high-voltage multiplier, wherein the converter comprises a three-phase input filter, a rectifier circuit and a high-voltage power supply inverter circuit, which are sequentially connected with one another; a zero current soft switch IGBT full-bridge circuit is adopted by the high-voltage power supply inverter circuit; an output end of the high-voltage power supply inverter circuit is connected with a first resonant capacitor C2 in series; the high-voltage multiplier comprises a high-voltage transformer, a voltage-doubler rectifier, a sparking-resistant circuit and a high-voltage output structure, which are sequentially connected with one another; a primary side of the high-voltage transformer is connected with an resonant inductor L1 in series; the primary side of the high-voltage transformer is connected with a second resonant capacitor C1 in parallel; and the first resonant capacitor C2, the resonant inductor L1 and the second resonant capacitor C1 form a resonant tank circuit. Combination of the high-voltage power supply inverter circuit and the resonant tank circuit disclosed by the invention has short-circuit self-protecting characteristics, namely the resonant inductor can block a current jump when a load is in a short circuit, so that the impact to the power supply circuit is effectively reduced; and the sparking resistance of the circuit is improved.

Description

technical field [0001] The invention relates to a high-voltage direct-current power supply, in particular to a high-voltage direct-current power supply for a dust removal system. Background technique [0002] Electrostatic precipitator is an internationally recognized high-efficiency dust removal device with a history of more than 100 years. It is one of the main devices for coal-fired flue gas purification and many industrial dust pollution control. At present, it has been widely used in industrial sectors such as thermal power generation, building materials, cement, iron and steel, nonferrous smelting, chemical industry, light industry papermaking, electronics and machinery. The electrostatic precipitator system is mainly composed of the electrostatic precipitator body and the power supply. The power supply generates the high voltage required by the electric precipitator. Although it only accounts for a small part of the total volume of the electrostatic precipitator syste...

AI Technical Summary

Problems solved by technology

At present, the power supply device of the electrostatic precipitator is mainly a high-voltage silicon rectifier power supply controlled by a thyristor, and its basic operating frequency is the frequency of the power grid. The secondary voltage fluctuates greatly, which affects the dust collection efficiency

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