High-frequency and high-voltage electrostatic precipitation power supply

Abstract

The invention discloses a high-frequency and high-voltage electrostatic precipitation power supply which comprises a main circuit and a control circuit of the power supply system, as well as an upper computer, wherein the main circuit of the power supply system comprises a three-phase alternating current reactor, a three-phase uncontrolled rectifier, a filter capacitor, a full-bridge inverter circuit, an LC filter and a high-frequency and high-voltage rectifier transformer; the control circuit of the power supply system comprises a voltage and current sampling circuit, an analog quantity conditioning circuit, a digital conditioning circuit, a drive circuit, a DSP (Digital Signal Processor) main circuit, an Ethernet communication facility; a collected voltage or current is sent to the DSP main circuit after being conditioned by the analog quantity conditioning circuit, on the one hand, the DSP chip is used for handling and controlling the operation of the control system according to collected data, on the other hand the DSP chip generates an SPWM (Sinusoidal Pulse Width Modulation) wave which is processed by the digital conditioning circuit and the drive circuit so as to control the turn-on and turn-off of the full-bridge inverter circuit. A voltage wave, which is output after the SPWM wave is used for controlling the full-bridge inversion, is filtered by the LC to form a sine wave which has less harmonic components and causes less impact on the high-frequency rectifier transformer.

Description

technical field [0001] The invention relates to a high-frequency and high-voltage electrostatic dust removal power supply, in particular to a high-frequency and high-voltage electrostatic dust removal power supply with SPWM inverter output, belonging to the technical field of environmental protection equipment. Background technique [0002] With the rapid development of industry, environmental problems have become increasingly prominent, and the problem of air pollution is extremely serious. Industrial waste gas is discharged into the atmosphere, and the dust in the waste gas brings serious harm to human health. Therefore, dust removal treatment should be carried out before industrial waste gas is discharged. At present, most of the dust removal power supplies in my country are still dominated by industrial frequency. In the existing high frequency dust removal power supplies, on the one hand, the output voltage of the inverter circuit is output in a square wave form, which...

AI Technical Summary

Problems solved by technology

At present, most of the dust removal power supplies in my country are still dominated by power frequency. In the existing high frequency dust removal power supplies, on the one hand, the output voltage of the inverter circuit is output in a square wave form, which causes serious harmonics and impacts on the transformer. Relatively large, which seriously affects the life of the transformer, and then affects the use of the entire power supply; on the other hand, due to the increase in frequency and the influence of the parasitic parameters of the transformer, not only the loss is increased, but also the electromagnetic interference

In the prior art, the patent document with the patent number "CN202410836" discloses a new type of high-frequency high-voltage power supply for electrostatic dust removal. When this type of high-frequency high-voltage power supply is actually running, it does not fully consider the The influence of the generated harmonics on the power system, and no measures have been taken for the main harmonics generated by the circuit

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