CN103394412B - A kind of electric precipitation high-frequency impulse power power-supply - Google Patents

A kind of electric precipitation high-frequency impulse power power-supply Download PDF

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CN103394412B
CN103394412B CN201310340611.6A CN201310340611A CN103394412B CN 103394412 B CN103394412 B CN 103394412B CN 201310340611 A CN201310340611 A CN 201310340611A CN 103394412 B CN103394412 B CN 103394412B
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circuit
frequency
power
voltage
supply
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CN201310340611.6A
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CN103394412A (en
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施小东
祝建军
施秦峰
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金华大维电子科技有限公司
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Abstract

The present invention relates to a kind of electric precipitation high-frequency impulse power power-supply, three-phase alternating-current supply is powered at deduster electric field after electric precipitation high-frequency impulse power power-supply, described electric precipitation high-frequency impulse power power-supply comprises major loop switch, Pulsed power generator, high frequency fundamental circuit, dsp controller, testing circuit, coupling circuit, and Pulsed power generator, high frequency fundamental circuit are connected between major loop switch and coupling circuit.<!--1-->

Description

A kind of electric precipitation high-frequency impulse power power-supply

Technical field

The present invention relates to a kind of high voltage pulse power power supply, particularly a kind of electric precipitation high-frequency impulse power power-supply.

Background technology

In recent years, along with country strengthens the management of atmosphere pollution, the environmental emission standard of enterprise is also in raising, and a lot of industrial flue gas cleaning equipment does not all reach new standard, faces the situation of secondary transformation.The main flue gas purifying equipment of existing market is electric cleaner.And electric cleaner power supply is as one of the critical component of electric cleaner, it has important impact to dust removing effects, energy consumption, job stability, security.Existing market main power source is three phase mains and high frequency electric source.

Electric cleaner is the equipment utilizing dust granules thing in high voltage electric field purifying smoke.The gas cleaning process of electric cleaner divides three phases: 1, gas ionization and dust charged: between corona discharge electrode and dust collector pole, apply DC high voltage, make the gas ionization near corona discharge electrode, produce a large amount of negative ions.In corona zone, cation is absorbed in the past by corona discharge electrode immediately, and anion is then because moving to dust collector pole by ordering about of electric field force.2, dust deposit: after Charged arrives dust collector pole, releases negative electrical charge and deposits.3, deashing: dust collection is entered ash bucket.The efficiency of electric precipitation and gas ionization and dust charged blunt connect relevant, gas ionization and dust chargeability directly related with the voltage of deduster electric charge field, voltage of electric field raises and dust chargeability can be made to increase, thus raising efficiency of dust collection.Meanwhile, voltage of electric field is elevated to a certain degree, and electric field flashover can occur.The infringement that flashover is larger to power supply, should avoid as far as possible.So in order to solve the opposition contradiction of efficiency of dust collection and flashover, the way of above-mentioned two kinds of power supplys is similar, namely under the prerequisite that serious flashover (limited number of times flashover) does not occur, improve voltage of electric field as far as possible.So both can ensure the life-span of power supply, can raise the efficiency as much as possible again.

Said method has a defect.The parameter affecting the charged effect of dust granules thing is dust specific resistance, and in flue gas, dust granules thing size kind is different, and its ratio resistance is also different.Dust specific resistance is higher, and charged required voltage is higher.When there is not serious flashover in said method, better to the assimilation effect of low resistivity dust, and the dust absorbing effect of middle ratio resistance is general, and the dust absorbing effect of high specific resistance is poor.So cause the dust removing effects of deduster can not better promote; Or causing dedusting energy consumption significantly to increase for promoting dust removing effects, even shortening the deduster life-span.

On the other hand, from energy consumption angle, in electric precipitation process, the overwhelming majority in the electric energy of dedusting electric field consumption also has neither part nor lot in dust charged, but be directly moved to positive plate from minus plate with electronics form, be equivalent to a large amount of energy and waste in the electric field, the utilization rate causing electric energy is low.

Summary of the invention

For the defect in solution background technology and deficiency, the invention provides a kind of electric precipitation high-frequency impulse power power-supply, thus adopt the power supply type of high direct voltage first-harmonic superposition high voltage pulse power, make described high voltage pulse power power supply under the prerequisite ensureing low energy consumption, efficiently solve the absorption problem of middle high resistivity dust, serious flashover can not be produced simultaneously.

For achieving the above object, the present invention adopts following technical scheme: a kind of electric precipitation high-frequency impulse power power-supply, three-phase alternating-current supply is powered at deduster electric field after electric precipitation high-frequency impulse power power-supply, it is characterized in that: described electric precipitation high-frequency impulse power power-supply comprises major loop switch, Pulsed power generator, high frequency fundamental circuit, dsp controller, testing circuit, coupling circuit, and Pulsed power generator, high frequency fundamental circuit are connected between major loop switch and coupling circuit;

Described Pulsed power generator is connected in series successively is formed by the first rectification circuit, the first inverter circuit, intermediate-frequency transformer, current rectifying and wave filtering circuit, IGBT module, pulse transformer;

Described high frequency fundamental circuit is connected in series successively is formed by the second rectification circuit, the second inverter circuit, high frequency transformer, high-voltage rectifier;

Major loop switch is connected in series by breaker and contactor and forms, and three-phase alternating current is point two-way supply high frequency first-harmonic circuit and Pulsed power generator respectively after major loop switch;

IGBT module, the first inverter circuit, the second inverter circuit connect with dsp controller respectively, and dsp controller connects with the output of coupling circuit after serial connection testing circuit.

Optimize for one of the present invention, described coupling circuit adopts high pressure coupling capacitance as coupled apparatus.

Optimize for one of the present invention, dsp controller comprises pwm signal output, analog signal processing, keyboard, liquid crystal display, memory cell, communication interface unit, fault monitoring and protection unit.

One of the present invention is optimized, testing circuit comprises: the three-phase input voltage of high frequency fundamental circuit part input electric cur-rent measure circuit, export fundamental voltage current detection circuit and Pulsed power generator part three-phase input voltage input electric cur-rent measure circuit, direct current bus voltage detecting circuit, output peak impulse voltage peak current detection circuit, each testing circuit all adopts light-coupled isolation technology.

Optimize for one of the present invention, IGBT module have employed LC resonant soft-switching.

The present invention is compared with background technology, there is the power supply type adopting high direct voltage first-harmonic superposition high voltage pulse power, make described high voltage pulse power power supply under the prerequisite ensureing low energy consumption, efficiently solve the absorption problem of middle high resistivity dust, serious flashover can not be produced simultaneously; And owing to have employed the form of high direct voltage first-harmonic superposition high voltage pulse power, high direct voltage first-harmonic can significantly lower than the operating voltage of other power supplys, and arriving moment at high-voltage pulse, electric field potential raises, and dust is charged, after high-voltage pulse disappears, under the electric field action that high pressure first-harmonic is formed, the Charged pole plate that faces south moves, and makes to consume the energy consumption having neither part nor lot in dust in the electric field charged and greatly reduces, thus reduce energy consumption, improve utilization rate of electrical; Series resonance soft switch technique is adopted to reduce switching loss; and possess short-circuit protection, open-circuit-protection, over-voltage over-current protection; real-time adjustment input voltage is to ensure the functions such as stable output; possess frequency modulation, amplitude modulation, the wide function of tune simultaneously, have that efficiency of dust collection is high, energy consumption and performance good, security reliability high.

Accompanying drawing explanation

Fig. 1 is the theory diagram of electric precipitation high-frequency impulse power power-supply;

Fig. 2 is the circuit theory diagrams of major loop switch;

Fig. 3 is the Control system architecture block diagram of electric precipitation high-frequency impulse power power-supply;

Fig. 4 is the output voltage waveform of electric precipitation high-frequency impulse power power-supply;

Detailed description of the invention

Embodiment 1: with reference to Fig. 1 ~ 4.A kind of electric precipitation high-frequency impulse power power-supply, three-phase alternating-current supply is powered at deduster electric field after electric precipitation high-frequency impulse power power-supply, it is characterized in that: described electric precipitation high-frequency impulse power power-supply comprises major loop switch, Pulsed power generator, high frequency fundamental circuit, dsp controller, testing circuit, coupling circuit, and Pulsed power generator, high frequency fundamental circuit are connected between major loop switch and coupling circuit;

Major loop switch is connected in series by breaker and contactor and forms, and three-phase alternating current is point two-way supply high frequency first-harmonic circuit and Pulsed power generator respectively after major loop switch;

Described Pulsed power generator is connected in series successively is formed by the first rectification circuit, the first inverter circuit, intermediate-frequency transformer, current rectifying and wave filtering circuit, IGBT module, pulse transformer; Described high frequency fundamental circuit is connected in series successively is formed by the second rectification circuit, the second inverter circuit, high frequency transformer, high-voltage rectifier; Described first rectification circuit, the second rectification circuit are bidirectional triode thyristor loop.

The three-phase alternating current of input is by major loop switch, through the second rectification circuit, input to the armature winding input of high frequency transformer, high-voltage rectifier by being made up of 6 high voltage silicon rectifier stacks after secondary boosting, obtain the high direct voltage of negative polarity, then after filtering, be input to coupled circuit portions; The second rectification circuit in described high frequency fundamental circuit, namely the 6 road pwm signals that bidirectional triode thyristor sends by dsp controller control, when output voltage is too high or too low, dsp controller is by changing pwm signal waveform, adjust the angle of flow of bidirectional triode thyristor, thus play the effect of adjustment output voltage.IGBT module, the first inverter circuit, the second inverter circuit connect with dsp controller respectively, and dsp controller connects with the output of coupling circuit after serial connection testing circuit.The three-phase alternating current of input arrives the primary side of intermediate-frequency transformer through major loop switch and the second rectification circuit, after the rectifying and wave-filtering of transformer boost and current rectifying and wave filtering circuit, produce DC bus-bar voltage; By IGBT module, then through pulse transformer boost, produce high-voltage pulse, after filtering, be input to coupled circuit portions.

Described Pulsed power generator, by the restriction of IGBT module maximum current, adopts two-stage boosting: the first order is Industrial Frequency Transformer boosting, obtains DC bus-bar voltage; The second level is pulse transformer boosting, obtains high-voltage pulse.The second rectification circuit in described Pulsed power generator, i.e. bidirectional triode thyristor circuit, identical with bidirectional triode thyristor control mode in high frequency fundamental circuit, namely when DC bus-bar voltage is too high or too low, the angle of flow of dsp controller adjustment bidirectional triode thyristor, thus play the effect of adjustment DC bus-bar voltage.The current rectifying and wave filtering circuit of described Pulsed power generator, forms rectification circuit by six high voltage silicon rectifier stacks, high-voltage capacitance filtering, obtains stable DC bus-bar voltage, to ensure that the working environment of IGBT is stablized.The IGBT module of described Pulsed power generator have employed LC resonant soft-switching, effectively reduces switching loss.Comprise the parts such as absorption circuit, overvoltage crowbar, current foldback circuit.

Described coupling circuit adopts high pressure coupling capacitance as coupled apparatus.

Testing circuit comprises: the three-phase input voltage of high frequency fundamental circuit part input electric cur-rent measure circuit, export fundamental voltage current detection circuit and Pulsed power generator part three-phase input voltage input electric cur-rent measure circuit, direct current bus voltage detecting circuit, output peak impulse voltage peak current detection circuit, each testing circuit all adopts light-coupled isolation technology.

Dsp controller comprises pwm signal output, analog signal processing, keyboard, liquid crystal display, memory cell, communication interface unit, fault monitoring and protection unit, thus to the analog acquisition of testing circuit, process, and show at liquid crystal display, the angle of flow of adjustment bidirectional triode thyristor, thus adjustment input voltage size; Intelligent Measurement fault and he when breaks down starting protection.

Embodiment 2: with reference to Fig. 2 and 3.A kind of principle of electric precipitation high-frequency impulse power power-supply is as follows: major loop switch 1 is connected with the AC power of three-phase 380V/50Hz, major loop switch 1 is connected in series by breaker and contactor and forms, after major loop switch 1 is closed, electric current divides A, B two parts to flow into high pressure first-harmonic generator and Pulsed power generator respectively.Part A: bidirectional triode thyristor loop 2 is connected with major loop switch 1 and three-phase main-frequency transformer 3, bidirectional triode thyristor loop 2 adopts one-piece type bidirectional triode thyristor structure, and three-phase high-voltage silicon rectifier 4 is connected with the secondary of three-phase main-frequency transformer 3 and electric cleaner 5.Part B: bidirectional triode thyristor loop 6 is connected with major loop switch 1 and three-phase main-frequency transformer 7, three-phase high-voltage silicon rectifier 8 is connected with three-phase main-frequency transformer 7 and pulse generate loop 9, pulse transformer 10 is connected with pulse generate loop 9 and electric cleaner 5, and electric cleaner 5 comprises deduster body, filter resistance R1, output voltage detection divider resistance R2, R3 and output electric current measure resistance R4.After power supply is connected, by breaker and the contactor of major loop switch 1, part A is through being controlled the bidirectional triode thyristor loop 2 of the angle of flow by dsp controller, adjustment input three-phase voltage size, then three-phase main-frequency transformer boost is inputted, by 6 high voltage silicon rectifier stack bridge rectifiers, obtain negative polarity d. c high pressure first-harmonic; Part B adjusts after input three-phase voltage size through bidirectional triode thyristor loop 6, boost through three-phase main-frequency transformer 7, again by obtaining DC bus-bar voltage after high voltage silicon rectifier stack 8 bridge rectifier, DC bus-bar voltage produces through IGBT pulse generate loop 9 the former limit that pulse current is input to pulse transformer 10, after pulse transformer boost 10, obtain negative high voltage pulse.A rood to HVDC first-harmonic and the negative high voltage pulse of arriving of B rood, the high voltage source obtaining first-harmonic superimposed pulse through high voltage capacitor coupling outputs to electric cleaner.

The control procedure summary of high-voltage pulse power source dsp controller: controller is main control unit with TMS320F28335, comprises the parts such as keyboard, liquid crystal display, memory cell, communication interface, analog signal processing, pwm signal output and fault monitoring and protection unit.CPU output multi-channel pwm control signal realizes the stable output of power supply, and wherein IGBT drives 1 road pwm control signal, 6 road pwm control signals piled by first-harmonic part bidirectional triode thyristor, 6 road pwm control signals piled by segment pulse bidirectional triode thyristor, output voltage peak detection circuit 1 road pwm control signal, output current peak detection circuit 1 road pwm control signal.Controller can realize detection to three-phase input voltage, the detection of input current, the detection of segment pulse DC bus-bar voltage, output voltage average detects, output current average detects, output voltage peak value of pulse detects, output current peak value of pulse detects and temperature of oil in transformer detection etc.Detect output voltage, the electric current of gained, after AD conversion, CPU process, the pwm signal in first-harmonic bidirectional triode thyristor loop is sent in corresponding adjustment, thus realizes the control to fundamental voltage output of voltage; In like manner, detect output crest voltage, the electric current of gained, and DC bus-bar voltage, after AD conversion, CPU process, the pwm signal in segment pulse bidirectional triode thyristor loop is sent in corresponding adjustment, thus the control realized DC bus-bar voltage, and then realize the control to exporting pulse amplitude.

Claims (1)

1. an electric precipitation high-frequency impulse power power-supply, three-phase alternating-current supply is powered at deduster electric field after electric precipitation high-frequency impulse power power-supply, it is characterized in that: described electric precipitation high-frequency impulse power power-supply comprises major loop switch, Pulsed power generator, high frequency fundamental circuit, dsp controller, testing circuit, coupling circuit, and Pulsed power generator, high frequency fundamental circuit are connected between major loop switch and coupling circuit;
Described Pulsed power generator is connected in series successively is formed by the first rectification circuit, the first inverter circuit, intermediate-frequency transformer, current rectifying and wave filtering circuit, IGBT module, pulse transformer;
Described high frequency fundamental circuit is connected in series successively is formed by the second rectification circuit, the second inverter circuit, high frequency transformer, high-voltage rectifier;
Major loop switch is connected in series by breaker and contactor and forms, and three-phase alternating current is point two-way supply high frequency first-harmonic circuit and Pulsed power generator respectively after major loop switch;
IGBT module, the first inverter circuit, the second inverter circuit connect with dsp controller respectively, and dsp controller connects with the output of coupling circuit after serial connection testing circuit,
Described coupling circuit adopts high pressure coupling capacitance as coupled apparatus,
Dsp controller comprises pwm signal output, analog signal processing, keyboard, liquid crystal display, memory cell, communication interface unit, fault monitoring and protection unit,
Testing circuit comprises: the three-phase input voltage of high frequency fundamental circuit part input electric cur-rent measure circuit, export fundamental voltage current detection circuit and Pulsed power generator part three-phase input voltage input electric cur-rent measure circuit, direct current bus voltage detecting circuit, output peak impulse voltage peak current detection circuit, each testing circuit all adopts light-coupled isolation technology
IGBT module have employed LC resonant soft-switching.
CN201310340611.6A 2013-08-06 2013-08-06 A kind of electric precipitation high-frequency impulse power power-supply CN103394412B (en)

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CN103986363A (en) * 2014-05-14 2014-08-13 大连泰格尔电子科技有限公司 High-frequency multiple high voltage pulse generating method, high-frequency multiple high voltage pulse power supply and electric precipitator
CN104143933A (en) * 2014-06-10 2014-11-12 江苏容天机电科技有限公司 Electrostatic dust collection micropulse transformer
CN104201930B (en) * 2014-08-26 2016-08-24 江苏科技大学 Electrostatic precipitation pulsed high-voltage origin system and high-voltage pulse circuit method for designing
CN104270030B (en) * 2014-10-11 2017-07-07 孙卓 A kind of pulse power that can be exported with short circuit
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CN104785373B (en) * 2015-04-03 2017-06-20 浙江大维高新技术股份有限公司 A kind of electric precipitation pulse power
EP3112029A1 (en) * 2015-06-29 2017-01-04 General Electric Technology GmbH Pulse firing pattern for a transformer of an electrostatic precipitator and electrostatic precipitator
CN105207516B (en) * 2015-09-14 2017-10-20 上海交通大学 Electric precipitation is superimposed high-voltage pulse power source with high-frequency high-voltage direct-current
CN108923680A (en) * 2018-07-18 2018-11-30 湖北新空电气有限公司 A kind of direct-coupled electric precipitation pulse power in high-pressure side
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