Three-phase direct-current high-voltage power supply intermittent power supply circuit for electric precipitation

Abstract

The invention relates to a three-phase direct-current high-voltage power supply intermittent power supply circuit for electric precipitation, which comprises a main circuit and a microcomputer controller, and is characterized in that the main circuit comprises a three-phase bridge rectifier circuit consisting of six thyristors; wherein the microcomputer controller is connected with the main circuit, collects three-phase synchronous signals of the main circuit and voltage and current signals output by the main circuit, obtains delay trigger angle signals of six thyristors according to the voltage and current signals, and obtains respective synchronous signals of the six thyristors according to the three-phase synchronous signals; acquiring respective trigger pulse signals of six thyristorsbased on the synchronization signal and the delay trigger angle signal; and the trigger pulse signals of the six thyristors are respectively sent to the corresponding thyristors so as to realize intermittent power supply of the three-phase direct-current high-voltage power supply for electric precipitation. According to the invention, trigger pulse signals of the six thyristors are respectively adjusted and output, so that intermittent power supply of the three-phase direct-current high-voltage power supply for electric precipitation is realized.

Description

technical field [0001] The invention relates to the technical field of electric dust removal power supply, and more specifically relates to an intermittent power supply circuit of a three-phase DC high-voltage power supply for electric dust removal. Background technique [0002] Three-phase high-voltage silicon rectifier power supply, which uses three-phase grid power input directly, three-phase thyristor full-control phase-shift voltage regulation, boosted by a three-phase transformer, and obtains a 0-150KV high-voltage DC signal after secondary rectification. Widely used in coal-fired power plants, steel, cement, building materials and other dust removal systems. The existing three-phase DC high-voltage power supply output mode for dust removal mostly adopts full-wave three-phase balanced output, and then adjusts the output voltage and output power by controlling the size of the trigger angle. However, because the environmental protection department is becoming increasing...

AI Technical Summary

Problems solved by technology

However, because the environmental protection department is becoming increasingly strict on dust removal and emission, the existing full-wave power supply method cannot meet the emission requirements. Increasing the output power can indeed improve the dust removal efficiency under certain dust removal conditions, but when the output power increases to a certain value, the dust removal effect increases. Significantly weakened, in the dust removal system such as medium and high specific resistance, it will reduce the dust removal effect

Therefore, the existing power supply method not only wastes energy, but also fails to meet the requirements under certain working conditions.

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