Fuzzy prediction control system of power supply for electrostatic dust collection and control method of fuzzy prediction control system

Abstract

The invention discloses a fuzzy prediction control system of a power supply for electrostatic dust collection and a control method of the fuzzy prediction control system. The control method comprises the steps that an analog signal acquisition unit converts an acquired analog signal to an electrical signal, and outputs the electrical signal to a T-S fuzzy controller after carrying out conditioning such as filtering on the electrical signal, and the T-S fuzzy controller first recognizes a first component and a conclusion part of a T-S fuzzy model according to the conditioned signal, obtains the T-S fuzzy model, then converts the T-S fuzzy model to a step response model, and outputs the step response model to a prediction controller 23 to act as a prediction model; the prediction controller takes the step response model as the prediction model, carries out rolling optimization and feedback compensation, and outputs a control signal to a digital logic unit; and the control signal passes the digital logic unit and then acts as a driving signal of a control driving unit to carry out fuzzy prediction control on the power supply. The problem that a mathematical model can not be established easily for an electrostatic dust collection system is solved, and the dependence of the prediction controller on the accurate mathematical model is reduced.

Description

technical field [0001] The invention relates to the technical field of high-voltage electrostatic dust removal, in particular to a fuzzy prediction control system and method for a high-frequency high-voltage power supply for electrostatic dust removal. Background technique [0002] The high-voltage electrostatic precipitator technology can handle dust with a wide particle size range, small pressure loss, and can handle high-temperature gas. The efficiency of electrostatic precipitator mainly depends on the driving speed of dust particles, and the driving speed increases with the increase of charging field strength E and dust collection field strength Ep (for single-zone electrostatic precipitator, E=Ep). In order to achieve higher dust removal efficiency, the electric field strength should be increased as much as possible. The field strength is related to the corona current, which is proportional to the plate voltage. The control of the electric field voltage of the electr...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a fuzzy predictive control system and control method of a high-frequency high-voltage power supply for electrostatic precipitator, to overcome the problem that it is difficult to establish an accurate mathematical model due to the non-linearity, time-varying, and hysteresis of the electrostatic precipitator power supply; At the same time, in the process of electrostatic dust removal, the problems of flashover and low dust removal efficiency caused by the change of the dust load peculiar to the dust collector are overcome to ensure that the dust removal system works normally, the working voltage is stable, and the dust removal effect is stable, and the design cost of the controller is relatively low. Low

Images