Fuzzy control method for high-frequency high-voltage power supply for electrostatic dust collection

Abstract

The invention discloses a fuzzy control method for a high-frequency high-voltage power supply for electrostatic dust collection. The fuzzy control method mainly comprises the following steps: 1) converting an output voltage of the high-frequency high-voltage power supply for electrostatic dust collection into a corresponding voltage signal through a voltage acquisition circuit, transmitting to an A/D (analog/digital) conversion circuit of a DSP (Digital Signal Processor) chip to become digital quantity, comparing with a preset voltage quantity so as to judge whether flashover occurs, thus obtaining a voltage deviation and voltage deviation change rate through the DSP chip; 2) calculating a corresponding control signal through a DSP according to the voltage deviation and voltage deviation change rate and converting to a corresponding PWM (Pulse-Width Modulation) duty cycle, outputting a PWM wave with variable duty cycle to a driving circuit of a dust collection power supply through a PWM output circuit, thus realizing the control on the output voltage of the dust collection power supply. According to the fuzzy control method, the high-frequency high-voltage power supply for electrostatic dust collection is simple and convenient to control, the spark control rate is optimal, and the fuzzy control method is well adaptive to the characteristics of non-linearity, variability and complexity in working.

Description

technical field [0001] The invention relates to a high-frequency and high-voltage power supply for electrostatic dust removal, in particular to a fuzzy control method for a high-frequency and high-voltage power supply for electrostatic dust removal, and belongs to the technical field of environmental protection equipment. Background technique [0002] With the continuous development of industry, air pollution is becoming more and more serious, especially in recent years, the monitoring of PM2.5 has put forward higher requirements for industrial dust removal technology. Among them, high-frequency and high-voltage electrostatic precipitators are more and more widely used in industrial dust removal. [0003] At present, the control method of domestic high-voltage electrostatic precipitator is mainly based on PID controller. In actual use, it is found that because the power control system is a lagging system, and the working environment is complex, with characteristics such as ...

AI Technical Summary

Problems solved by technology

In actual use, it is found that because the power control system is a lagging system, and the working environment is complex, with characteristics such as nonlinearity, variability and complexity, it is difficult to obtain an accurate mathematical model

This makes traditional PID controllers difficult to select control parameters, and cannot adjust the power supply in real time according to changes in the cremation rate.

[0004] The patent document with the application number 200810126315.5 discloses a fuzzy control method for the stable operation of the electrostatic precipitator system. The disclosed method uses the detection of the secondary current value to judge the generation of sparks. The current value is still very small, and the accuracy of the collected value is low, which increases the rapid recovery time of the electric field after the spark is generated, which is not conducive to saving electric energy.

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