CN110548597A - Control method of high-frequency high-voltage electrostatic dust suppression power supply - Google Patents

Control method of high-frequency high-voltage electrostatic dust suppression power supply Download PDF

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Publication number
CN110548597A
CN110548597A CN201910782805.9A CN201910782805A CN110548597A CN 110548597 A CN110548597 A CN 110548597A CN 201910782805 A CN201910782805 A CN 201910782805A CN 110548597 A CN110548597 A CN 110548597A
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CN
China
Prior art keywords
power supply
voltage
dust suppression
control
main circuit
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Pending
Application number
CN201910782805.9A
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Chinese (zh)
Inventor
张梅生
王烨
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Tianjin Hua Pai Production Container Co Ltd
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Tianjin Hua Pai Production Container Co Ltd
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Priority to CN201910782805.9A priority Critical patent/CN110548597A/en
Publication of CN110548597A publication Critical patent/CN110548597A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/66Applications of electricity supply techniques
    • B03C3/68Control systems therefor

Abstract

the invention discloses a control method of a high-frequency high-voltage electrostatic dust suppression power supply. In the working process, a sampling circuit collects voltage and current signals when the dust suppression power supply main circuit outputs, a remote monitoring unit compares the output voltage and current signals of the current power supply system main circuit with given values respectively, the output voltage and current signals are input to a PID controller, each initial parameter value of the PID controller is obtained according to an empirical method, then a fuzzy control module in the PID controller is used for carrying out online setting on the initial control parameters, the initial control parameters are output to an IGBT drive circuit, a full-bridge inverter circuit in a high-frequency high-voltage power supply main circuit is driven, and the dust suppression power supply system main circuit is controlled. The invention has the advantages of high control precision, good flexibility, strong adaptability, real-time system voltage and current monitoring and debugging, remote monitoring and debugging, flexible control, and convenient maintenance and debugging.

Description

control method of high-frequency high-voltage electrostatic dust suppression power supply
Technical Field
The invention relates to a control method of a high-frequency and high-voltage power supply for static dust suppression, in particular to a control method of a high-frequency and high-voltage power supply for wet static dust suppression based on a fuzzy self-tuning PID control algorithm.
background
At present, most of high-frequency and high-voltage power supplies for static dust suppression in China have a structure as shown in fig. 1 and comprise a main circuit and a driving circuit taking a DSP control system as a core. The basic idea of the operation is that the rectification module converts the input three-phase commercial power alternating voltage into direct current bus voltage, and the direct current bus voltage is inverted by the filter circuit and the high-frequency inverter circuit to output high-frequency alternating current; the obtained high-frequency alternating current is subjected to a boosting link and then is output to a high-voltage direct current by a high-voltage rectification link to be supplied to a dust suppressor for use; the control system part taking the DSP as a core can acquire output current and voltage signals of the system in real time, compares the output current and voltage signals with a given value, and adjusts the output signals by controlling the IGBT driving circuit; the auxiliary power supply is responsible for providing power for a rectifying circuit, a filter circuit, a high-frequency inverter circuit, a high-frequency boosting transformer, a high-voltage rectifying circuit, a DSP control system and the like.
The electrostatic dust suppressor has simple structure and can also play a basic dust suppression effect. However, the dust suppression efficiency is low, and in the actual control, due to the continuous change of the external environment and the complex structure of the wet-type electrostatic dust suppression high-frequency power supply, once the nonlinear load of the system has sudden change or input disturbance, the parameters of the controlled object are changed, so that the model is easy to be inaccurate. In this case, since the parameters are given, the control system will not change with the change of the controlled object, so that the control effect is difficult to meet the control performance requirement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a control method of a high-frequency high-voltage electrostatic dust suppression power supply, which has the advantages of high PID control precision, fuzzy control flexibility and strong adaptability and can realize remote monitoring and control.
in order to achieve the purpose, the invention adopts the technical scheme that:
The invention discloses a control method of a high-frequency and high-voltage power supply for static dust suppression, which comprises the following steps:
the method comprises the following steps that firstly, an upper computer is connected with a DSP control system of a high-frequency high-voltage static dust suppression power supply system through a CAN bus, the signal input end of a remote monitoring unit is connected with the upper computer, the signal output end of the remote monitoring unit is connected with a PID controller, and the PID controller is connected with a signal input interface of an IGBT driving circuit;
Secondly, in the working process of the electrostatic dust suppression device, a voltage and current sampling circuit unit collects voltage and current signals output by a main circuit part of the electrostatic dust suppression power supply system, the voltage and current signals are subjected to A/D conversion and then are transmitted to a DSP control system, the DSP control system is transmitted to an upper computer through a CAN bus, the upper computer displays the output voltage and the output current of the main circuit part of the electrostatic dust suppression power supply system in real time and transmits the output voltage and the output current to a remote monitoring unit for real-time display, and remote control personnel CAN conveniently control the electrostatic dust suppression power supply system;
Comparing output voltage and current signals of a main circuit part of the current static dust suppression power supply system with given values respectively by a remote monitoring unit, then inputting difference values of actual values and the given values of the output voltage and the output current to a PID controller respectively, and obtaining initial parameter values of the PID controller according to an empirical method, wherein the initial parameter values comprise a proportional gain K P0, an integral gain K I0 and a differential gain K D0;
P0 I0 D0performing difference operation on output voltage and current signals of a main circuit part of an actual static dust suppression power supply system and a given value respectively to obtain an error e, differentiating the error e to obtain a change rate delta e of the error, and inputting the error e and the change rate delta e of the error to a fuzzy control module in the PID controller, wherein the fuzzy control module automatically adjusts the initial control parameters of the PID controller by fuzzy reasoning to obtain the optimal parameters for controlling the output voltage and the output current of the main circuit part of the high-frequency high-voltage power supply;
And step five, outputting the adjusted proportional gain K P, integral gain K I and differential gain K D to an IGBT driving circuit by the PID controller, driving a full-bridge inverter circuit in the high-frequency high-voltage power supply main circuit by the IGBT driving circuit, and further controlling the whole static dust suppression power supply system main circuit.
Compared with the prior art, the invention has the following beneficial effects:
the method has the advantages of high control precision, good flexibility, strong adaptability, real-time system voltage and current monitoring and debugging, remote monitoring and debugging, flexible control, and convenient maintenance and debugging.
Drawings
FIG. 1 is a block diagram of a high-frequency high-voltage dust suppression power supply system;
FIG. 2 is a block diagram of the high-frequency high-voltage dust suppression power supply system of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
the device applied by the method of the invention is an improvement on the existing high-frequency high-voltage dust suppression power supply system.
As shown in fig. 2, the method for controlling a high-frequency and high-voltage power supply for static dust suppression according to the present invention comprises the following steps:
The method comprises the following steps that firstly, an upper computer is connected with a DSP control system of a high-frequency high-voltage static dust suppression power supply system through a CAN bus, the signal input end of a remote monitoring unit is connected with the upper computer, the signal output end of the remote monitoring unit is connected with a PID controller, and the PID controller is connected with a signal input interface of an IGBT driving circuit;
Secondly, in the working process of the electrostatic dust suppression device, a voltage and current sampling circuit unit collects voltage and current signals output by a main circuit part of the electrostatic dust suppression power supply system, the voltage and current signals are subjected to A/D conversion and then are transmitted to a DSP control system, the DSP control system is transmitted to an upper computer through a CAN bus, the upper computer displays the output voltage and the output current of the main circuit part of the electrostatic dust suppression power supply system in real time and transmits the output voltage and the output current to a remote monitoring unit for real-time display, and remote control personnel CAN conveniently control the electrostatic dust suppression power supply system;
comparing output voltage and current signals of a main circuit part of the current static dust suppression power supply system with given values respectively by a remote monitoring unit, then inputting difference values of actual values and the given values of the output voltage and the output current to a PID controller respectively, and obtaining initial parameter values of the PID controller according to an empirical method, wherein the initial parameter values comprise a proportional gain K P0, an integral gain K I0 and a differential gain K D0;
P0 I0 D0Performing difference operation on output voltage and current signals of a main circuit part of an actual static dust suppression power supply system and a given value respectively to obtain an error e, differentiating the error e to obtain a change rate delta e of the error, and inputting the error e and the change rate delta e of the error to a fuzzy control module in the PID controller, wherein the fuzzy control module automatically adjusts the initial control parameters of the PID controller by fuzzy reasoning to obtain the optimal parameters for controlling the output voltage and the output current of the main circuit part of the high-frequency high-voltage power supply;
The PID controller is established on the basis of a fuzzy control theory, relevant information such as fuzzy control rules, initial PID parameters, performance evaluation indexes and the like is stored in a computer knowledge base, and the PID parameters are automatically adjusted by a computer through fuzzy reasoning according to the response of an actual control system to obtain the optimal control parameters. The specific implementation structure of the fuzzy self-tuning PID control is specifically referred to book "fuzzy control system and application" 2012, huangweihua edition.
And step five, outputting the adjusted proportional gain K P, integral gain K I and differential gain K D to an IGBT driving circuit by the PID controller, driving a full-bridge inverter circuit in the high-frequency high-voltage power supply main circuit by the IGBT driving circuit, and further controlling the whole static dust suppression power supply system main circuit to achieve the effect of online real-time adjustment of the output voltage and the output current of the static dust suppression power supply system main circuit.

Claims (1)

1. A control method of a high-frequency and high-voltage power supply for static dust suppression is characterized by comprising the following steps:
the method comprises the following steps that firstly, an upper computer is connected with a DSP control system of a high-frequency high-voltage static dust suppression power supply system through a CAN bus, the signal input end of a remote monitoring unit is connected with the upper computer, the signal output end of the remote monitoring unit is connected with a PID controller, and the PID controller is connected with a signal input interface of an IGBT driving circuit;
secondly, in the working process of the electrostatic dust suppression device, a voltage and current sampling circuit unit collects voltage and current signals output by a main circuit part of the electrostatic dust suppression power supply system, the voltage and current signals are subjected to A/D conversion and then are transmitted to a DSP control system, the DSP control system is transmitted to an upper computer through a CAN bus, the upper computer displays the output voltage and the output current of the main circuit part of the electrostatic dust suppression power supply system in real time and transmits the output voltage and the output current to a remote monitoring unit for real-time display, and remote control personnel CAN conveniently control the electrostatic dust suppression power supply system;
comparing output voltage and current signals of a main circuit part of the current static dust suppression power supply system with given values respectively by a remote monitoring unit, then inputting difference values of actual values and the given values of the output voltage and the output current to a PID controller respectively, and obtaining initial parameter values of the PID controller according to an empirical method, wherein the initial parameter values comprise a proportional gain K P0, an integral gain K I0 and a differential gain K D0;
P0 I0 D0Performing difference operation on output voltage and current signals of a main circuit part of an actual static dust suppression power supply system and a given value respectively to obtain an error e, differentiating the error e to obtain a change rate delta e of the error, and inputting the error e and the change rate delta e of the error to a fuzzy control module in the PID controller, wherein the fuzzy control module automatically adjusts the initial control parameters of the PID controller by fuzzy reasoning to obtain the optimal parameters for controlling the output voltage and the output current of the main circuit part of the high-frequency high-voltage power supply;
And step five, outputting the adjusted proportional gain K P, integral gain K I and differential gain K D to an IGBT driving circuit by the PID controller, driving a full-bridge inverter circuit in the high-frequency high-voltage power supply main circuit by the IGBT driving circuit, and further controlling the whole static dust suppression power supply system main circuit.
CN201910782805.9A 2019-08-23 2019-08-23 Control method of high-frequency high-voltage electrostatic dust suppression power supply Pending CN110548597A (en)

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Publication number Priority date Publication date Assignee Title
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CN103691559A (en) * 2013-12-06 2014-04-02 江苏科技大学 Fuzzy control method for high-frequency high-voltage power supply for electrostatic dust collection
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CN104259005A (en) * 2014-09-03 2015-01-07 江苏科技大学 High-frequency and high-voltage power supply controller for electrostatic dust collection and control method
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Application publication date: 20191210