CN211454317U - High-low voltage integrated high-frequency intelligent control system for dust removal - Google Patents
High-low voltage integrated high-frequency intelligent control system for dust removal Download PDFInfo
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- CN211454317U CN211454317U CN202020437807.2U CN202020437807U CN211454317U CN 211454317 U CN211454317 U CN 211454317U CN 202020437807 U CN202020437807 U CN 202020437807U CN 211454317 U CN211454317 U CN 211454317U
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Abstract
The utility model discloses adopt silicon controlled rectifier voltage regulation technique to realize high-voltage output to among the prior art electric precipitation controller, output frequency is low, and the problem that conversion efficiency is low provides a dust removal with integrative high-frequency intelligent control system of high-low pressure, belongs to electric precipitation controller technical field, and this system control high-voltage output frequency is high, high-low pressure simultaneous control, and intelligent degree is high. The intelligent controller comprises a high-voltage and low-voltage integrated high-frequency intelligent controller and a high-frequency inverter circuit, wherein the high-voltage and low-voltage integrated high-frequency intelligent controller comprises a 32-bit multi-core single chip microcomputer processor, and the 32-bit multi-core single chip microcomputer processor is connected with a plurality of detection sampling signals, a plurality of analog input signals, a plurality of analog output signals, a plurality of switching value input signals, a plurality of switching value output signals and an IGBT driving adapter plate; and the 32-bit multi-core singlechip processor is also connected with an RS485 communication interface and an Ethernet communication RJ45 interface.
Description
Technical Field
The utility model belongs to the technical field of the electric precipitation controller, concretely relates to dust removal is with integrative high frequency intelligent control system of high-low pressure.
Background
The electric dust removal control system mainly comprises a body (machinery) and an electric part of the dust remover. The controller is a key part of the electric dust removal control system. His quality directly affects the efficiency of dust removal. Under the normal condition of body installation, the dust remover operation and dust collection efficiency are mainly controlled by electrical equipment and are detected. The electrical equipment is mainly composed of a high-voltage part and a low-voltage part. However, the high-voltage part and the low-voltage part are separately controlled at the present stage, and the high-voltage part of the centralized control realizes high-voltage output by adopting voltage regulation technologies such as silicon controlled rectifier and the like, and the conditions of low output frequency, low conversion efficiency and the like generally exist; now, the controller only focuses on the boosting of the high-voltage part of the controller and does not consider the integrity of the whole system, so that the intelligent control of the system is not realized. For example, the patent with the patent application number of 201120110204.2 and the patent name of a three-phase high-voltage electrostatic dust removal control system still adopts the silicon controlled voltage regulation technology to realize high-voltage output, and has low output frequency and low conversion efficiency.
Disclosure of Invention
The utility model discloses adopt silicon controlled rectifier voltage regulation technique to realize high-pressure output to among the prior art electric precipitation controller, output frequency is low, and the problem that conversion efficiency is low provides a dust removal with integrative high frequency intelligent control system of high-low pressure, and this system control high-pressure output frequency is high, high-low pressure simultaneous control, and intelligent degree is high.
The invention aims to be realized by the following technical scheme: a high-low voltage integrated high-frequency intelligent control system for dust removal comprises a high-low voltage integrated high-frequency intelligent controller and a high-frequency inverter circuit, wherein the high-low voltage integrated high-frequency intelligent controller comprises a 32-bit multi-core single chip microcomputer processor, and the 32-bit multi-core single chip microcomputer processor is connected with a plurality of detection sampling signals, a plurality of analog quantity input signals, a plurality of analog quantity output signals, a plurality of switching quantity input signals, a plurality of switching quantity output signals and an IGBT driving adapter plate; the 32-bit multi-core single chip microcomputer processor is also connected with an RS485 communication interface and an Ethernet communication RJ45 interface;
an operational amplification unit and an optical coupler for amplifying and isolating the detection sampling signal and the analog input signal are sequentially connected between the detection sampling signal, the analog input signal and the 32-bit multi-core singlechip processor; the detection sampling signals comprise primary current/voltage sampling signals, secondary current/voltage sampling signals, high-frequency resonance current signals and a plurality of temperature sampling signals; the analog input signals comprise turbidity signals, load signals and standby signals, and the analog input signals are all current signals of 4-20 mA;
an optical coupler for performing photoelectric isolation on the signals is connected between the analog quantity output signal and the 32-bit multi-core single chip processor; the analog quantity output signals comprise primary voltage signals, primary current signals, secondary voltage signals and secondary current signals, the output signals are all current signals of 4-20 mA, and the output analog quantity signals are transmitted to the field DCS control system;
a high-speed optical coupler for performing photoelectric isolation on signals is connected between the IGBT driving adapter plate and the 32-bit multi-core single chip processor, and the IGBT driving adapter plate is connected with an IGBT module of the high-frequency inverter circuit;
the high-frequency inverter circuit comprises a breaker QF1, an alternating current contactor KM1, a reactor Z1 and a three-phase rectifier bridge TD1 which are sequentially connected, wherein the output end of the three-phase rectifier bridge TD1 is connected with the input end of an IGBT inverter loop, the output end of the IGBT inverter loop is connected with a primary coil of a boosting transformer TR1, a secondary coil of the boosting transformer TR1 is connected with the input end of a diode rectifier circuit DR1, the output end of the diode rectifier circuit is connected with the input end of an isolating switch SA3, and the output end of an isolating switch SA3 is connected with a dust remover ESP;
a filter capacitor C1 is connected in parallel between the three-phase rectifier bridge TD1 and the IGBT inverter circuit, IBGT modules D1 and D2 of the IGBT inverter circuit, D3 and D4 respectively form a semi-controlled bridge circuit structure, a resonant capacitor C2 is connected in series between the output end of the semi-controlled bridge circuit structure formed by D1 and D2 and the input end of the primary coil of the boosting transformer TR1, and the resonant capacitor C2 and the primary coil of the boosting transformer TR1 form a series resonant circuit.
In the scheme, the controller intelligently adjusts the output secondary current and secondary voltage by adopting PID according to the relevant conditions of detecting sampling signals, analog quantity input signals and switching quantity input signals, so that the intelligent control and adjustment of the high-low voltage integrated high-frequency intelligent controller for dust removal are realized, part of signals are processed to form 4-20 mA analog quantity signals and then are output to a DCS control system, and the high-low voltage integrated high-frequency intelligent controller for dust removal is provided with the requirements of Ethernet communication and MODBUS485 communication interfaces for facilitating data transmission of various industries, so that the aim of centralized control and monitoring of all devices on site is fulfilled. A three-phase power supply in the high-frequency inverter circuit is rectified into direct current through a three-phase rectifier bridge TD1, the direct current is inverted into two-phase high-voltage alternating current through an IGBT inverter circuit, a series resonance circuit is formed by a resonance capacitor C2 and a primary coil of a booster transformer TR1, and the inverted power supply voltage is further improved. The high-frequency high-voltage power supply boosted by the transformer is rectified into a high-voltage direct-current power supply by a diode rectifying circuit DR1 and then is transmitted to a dust remover ESP for high-voltage dust removal. The IGBT module has the characteristics of small driving power and high switching speed, and the switching frequency can reach more than 20 KHZ. The high-voltage and low-voltage integrated high-frequency intelligent controller for dust removal transmits signals to the IGBT module through the IGBT driving adapter plate to control the on-off frequency of the IGBT, so that the frequency and the voltage of a high-frequency and high-voltage power supply of the dust remover ESP are controlled by the high-frequency inverter circuit.
Preferably, two ends of the alternating current contactor KM1 are connected in parallel with a resistor R1, R2 and R3 respectively. The resistors R1, R2 and R3 are matched with the alternating current contactor KM1, when the alternating current contactor KM1 is started, when a main contact of the alternating current contactor KM1 is not attracted, three-phase alternating current is conducted and connected through the resistors R1, R2 and R3, and the three-phase alternating current charges a resonant capacitor C2 behind an IGBT (insulated gate bipolar translator) inverter circuit after passing through the reactor Z1 and the three-phase rectifier bridge TD1, so that energy required by first resonance is guaranteed. After the main contact of the alternating current contactor KM1 is attracted, three-phase alternating current flows into the reactor Z1 and the three-phase rectifier bridge TD1 through the main contact of the alternating current contactor KM1, and then normal stable voltage is supplied to the IGBT inversion loop, so that the resonant capacitor C2 is charged and discharged continuously, and normal operation of equipment is guaranteed.
Preferably, the input end of the ac contactor KM1 is further connected in parallel with a single-phase miniature circuit breaker QF2, the output end of the single-phase miniature circuit breaker QF2 is connected with the primary coil of an isolation transformer T1, the secondary coil of the isolation transformer T1 is connected with the input end of a switching power supply T2, and the output end of the switching power supply T2 is used for respectively supplying power to the high-low voltage integrated high-frequency intelligent controller, the switching value input signal and the switching value output signal; the input end of the switching power supply T2 is connected in parallel with a switching power supply T1, and the output end of the switching power supply T1 supplies power to the IGBT driving adapter plate. The switching power supplies T1 and T2 provide low-voltage direct current power for the controller, the IGBT driving adapter plate and switching value input and output signals after passing through the isolation transformer T1.
Preferably, the output end of the breaker QF1 is connected in parallel with an alternating current contactor KM2, the output end of the alternating current contactor KM2 is connected with the input end of a thermal protection relay FR, and the output end of the thermal protection relay FR is connected with a fan M1. When the system detects that the temperature of the transformer oil and the temperature of the IGBT module reach certain temperatures, the fan is started to radiate the system, and the stable operation of the system is guaranteed.
Preferably, the switching value input signal comprises a start-stop signal, a contactor feedback signal, a pre-charging feedback signal, an isolation switch interlocking signal, a negative striking feedback signal, a positive striking feedback signal, an insulator heating feedback signal, a hopper heating feedback signal, an auxiliary 1 feedback signal, an auxiliary 2 feedback signal, an oil level feedback signal and a fan feedback signal; the switching value output signals comprise contactor control signals, pre-charging output signals, alarm signals, trip signals, cathode beating signals, anode beating signals, insulator heating signals and ash hopper heating signals; and the output ends of the switching value output signals are respectively connected with relays for isolating the switching value output signals.
Preferably, a current limiting resistor and a voltage dividing resistor are connected between the switching value input signal and the 32-bit multi-core singlechip processor and then connected to the input end of the optocoupler, and the input end of the optocoupler is connected with an inverting diode in parallel. The reverse diode is used for protecting the light emitting diode of the optical coupler.
Compared with the prior art, the utility model discloses following beneficial effect has:
the IGBT module is adopted to replace a silicon controlled rectifier to control high-voltage output, so that the output frequency is higher; high-voltage control and low-voltage control are finished in the same system, and the intelligent degree is higher.
Drawings
FIG. 1 is a block diagram of a circuit structure of a high-low voltage integrated high-frequency intelligent controller;
FIG. 2 is a connection diagram of the working principle of the high-low voltage integrated high-frequency intelligent controller;
fig. 3 is a connection diagram of the operating principle of the high-frequency inverter circuit.
The labels in the figure are: 1. A 32-bit multi-core singlechip processor; 2. primary current/voltage sampling signals; 3. secondary current/voltage sampling signals; 4. a high frequency resonant current signal; 5. a temperature sampling signal; 6. an analog output signal; 7. an analog input signal; 8. a switching value input signal; 9. a switching value output signal; 10. the IGBT drives the patch panel.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
example 1
As shown in fig. 1, 2 and 3, a high-low voltage integrated high-frequency intelligent control system for dust removal comprises a high-low voltage integrated high-frequency intelligent controller and a high-frequency inverter circuit, wherein the high-low voltage integrated high-frequency intelligent controller comprises a 32-bit multi-core single-chip microcomputer processor 1, and the 32-bit multi-core single-chip microcomputer processor 1 is connected with a plurality of detection sampling signals, a plurality of analog input signals 7, a plurality of analog output signals 6, a plurality of switching input signals 8, a plurality of switching output signals 9 and an IGBT driving adapter plate 10; the 32-bit multi-core single chip microcomputer processor 1 is also connected with an RS485 communication interface and an Ethernet communication RJ45 interface;
an operational amplification unit and an optical coupler for performing signal amplification isolation on the detection sampling signal and the analog input signal 7 are sequentially connected between the detection sampling signal, the analog input signal 7 and the 32-bit multi-core singlechip processor 1; the detection sampling signals comprise a primary current/voltage sampling signal 2, a secondary current/voltage sampling signal 3, a high-frequency resonance current signal 4 and a plurality of temperature sampling signals 5; the analog input signals 7 comprise turbidity signals, load signals and standby signals, and the analog input signals 7 are all current signals of 4-20 mA;
an optical coupler for performing photoelectric isolation on the signals is connected between the analog quantity output signal 6 and the 32-bit multi-core single-chip microcomputer processor 1; the analog quantity output signals 6 comprise primary voltage signals, primary current signals, secondary voltage signals and secondary current signals, the output signals are all current signals of 4-20 mA, and the output analog quantity signals are transmitted to an on-site DCS (distributed control system);
the switching value input signal 8 comprises a start-stop signal, a contactor feedback signal, a pre-charging feedback signal, an isolating switch interlocking signal, a negative striking feedback signal, a positive striking feedback signal, an insulator heating feedback signal, a hopper heating feedback signal, an auxiliary 1 feedback signal, an auxiliary 2 feedback signal, an oil level feedback signal and a fan feedback signal; the switching value output signal 9 comprises a contactor control signal, a pre-charging output signal, an alarm signal, a trip signal, a cathode beating signal, an anode beating signal, an insulator heating signal and a dust hopper heating signal; a current limiting resistor and a voltage dividing resistor are connected between the switching value input signal 8 and the 32-bit multi-core single-chip microcomputer processor 1 and then connected to the input end of the optical coupler, and the input end of the optical coupler is connected with an inverse diode in parallel. The reverse diode is used for protecting the light emitting diode of the optical coupler. And the output ends of the switching value output signals 9 are respectively connected with relays for isolating the switching value output signals 9.
A high-speed optical coupler for performing photoelectric isolation on signals is connected between the IGBT driving adapter plate 10 and the 32-bit multi-core single chip processor 1, and the IGBT driving adapter plate 10 is connected with an IGBT module of the high-frequency inverter circuit;
the high-frequency inverter circuit comprises a breaker QF1, an alternating current contactor KM1, a reactor Z1 and a three-phase rectifier bridge TD1 which are sequentially connected, wherein the output end of the three-phase rectifier bridge TD1 is connected with the input end of an IGBT inverter loop, the output end of the IGBT inverter loop is connected with a primary coil of a boosting transformer TR1, a secondary coil of the boosting transformer TR1 is connected with the input end of a diode rectifier circuit DR1, the output end of the diode rectifier circuit is connected with the input end of an isolating switch SA3, and the output end of an isolating switch SA3 is connected with a dust remover ESP; two ends of the alternating current contactor KM1 are connected with a resistor R1, R2 and R3 respectively in parallel. The resistors R1, R2 and R3 are matched with the alternating current contactor KM1, when the alternating current contactor KM1 is started, when a main contact of the alternating current contactor KM1 is not attracted, three-phase alternating current is conducted and connected through the resistors R1, R2 and R3, and the three-phase alternating current charges a resonant capacitor C2 behind an IGBT (insulated gate bipolar translator) inverter circuit after passing through the reactor Z1 and the three-phase rectifier bridge TD1, so that energy required by first resonance is guaranteed. After the main contact of the alternating current contactor KM1 is attracted, three-phase alternating current flows into the reactor Z1 and the three-phase rectifier bridge TD1 through the main contact of the alternating current contactor KM1, and then normal stable voltage is supplied to the IGBT inversion loop, so that the resonant capacitor C2 is charged and discharged continuously, and normal operation of equipment is guaranteed. The output end of the breaker QF1 is connected in parallel with an alternating current contactor KM2, the output end of the alternating current contactor KM2 is connected with the input end of a thermal protection relay FR, and the output end of the thermal protection relay FR is connected with a fan M1. When the system detects that the temperature of the transformer oil and the temperature of the IGBT module reach certain temperatures, the fan is started to radiate the system, and the stable operation of the system is guaranteed.
A filter capacitor C1 is connected in parallel between the three-phase rectifier bridge TD1 and the IGBT inverter circuit, IBGT modules D1 and D2 of the IGBT inverter circuit, D3 and D4 respectively form a semi-controlled bridge circuit structure, a resonant capacitor C2 is connected in series between the output end of the semi-controlled bridge circuit structure formed by D1 and D2 and the input end of the primary coil of the boosting transformer TR1, and the resonant capacitor C2 and the primary coil of the boosting transformer TR1 form a series resonant circuit.
In the above scheme, the controller adopts PID intelligent regulation to output secondary current and secondary voltage according to the relevant conditions of detection sampling signals, analog quantity input signals 7 and switching value input signals 8, thereby realizing the intelligent control and regulation of the high-low voltage integrated high-frequency intelligent controller for dust removal, outputting analog quantity signals of 4-20 mA to a corresponding DCS control system after processing partial signals, and meeting the requirement of data transmission of various industries by using Ethernet communication and MODBUS485 communication interfaces on the high-low voltage integrated high-frequency intelligent controller for dust removal, thereby realizing the purpose of centralized control and monitoring of all devices on site. A three-phase power supply in the high-frequency inverter circuit is rectified into direct current through a three-phase rectifier bridge TD1, the direct current is inverted into two-phase high-voltage alternating current through an IGBT inverter circuit, a series resonance circuit is formed by a resonance capacitor C2 and a primary coil of a booster transformer TR1, and the inverted power supply voltage is further improved. The high-frequency high-voltage power supply boosted by the transformer is rectified into a high-voltage direct-current power supply by a diode rectifying circuit DR1 and then is transmitted to a dust remover ESP for high-voltage dust removal. The IGBT module has the characteristics of small driving power and high switching speed, and the switching frequency can reach more than 20 KHZ. The high-voltage and low-voltage integrated high-frequency intelligent controller for dust removal transmits signals to the IGBT module through the IGBT driving adapter plate 10 to control the on-off frequency of the IGBT, so that the frequency and the voltage of a high-frequency and high-voltage power supply of the dust remover ESP are controlled by the high-frequency inverter circuit.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. A high-low voltage integrated high-frequency intelligent control system for dust removal comprises a high-low voltage integrated high-frequency intelligent controller and a high-frequency inverter circuit, and is characterized in that the high-low voltage integrated high-frequency intelligent controller comprises a 32-bit multi-core single-chip microcomputer processor (1), and the 32-bit multi-core single-chip microcomputer processor (1) is connected with a plurality of detection sampling signals, a plurality of analog quantity input signals (7), a plurality of analog quantity output signals (6), a plurality of switching quantity input signals (8), a plurality of switching quantity output signals (9) and an IGBT driving adapter plate (10); the 32-bit multi-core single chip microcomputer processor (1) is also connected with an RS485 communication interface and an Ethernet communication RJ45 interface;
an operational amplification unit and an optical coupler for carrying out signal amplification isolation on the detection sampling signal and the analog input signal (7) are sequentially connected between the detection sampling signal, the analog input signal (7) and the 32-bit multi-core singlechip processor (1); the detection sampling signals comprise primary current/voltage sampling signals (2), secondary current/voltage sampling signals (3), high-frequency resonance current signals (4) and a plurality of temperature sampling signals (5); the analog input signals (7) comprise turbidity signals, load signals and standby signals, and the analog input signals are all current signals of 4-20 mA;
an optical coupler for performing photoelectric isolation on the signals is connected between the analog quantity output signal (6) and the 32-bit multi-core single chip processor (1); the analog quantity output signals (6) comprise primary voltage signals, primary current signals, secondary voltage signals and secondary current signals, the output signals are all current signals of 4-20 mA, and the output analog quantity signals are transmitted to a field DCS (distributed control System);
a high-speed optical coupler for photoelectrically isolating signals is connected between the IGBT driving adapter plate (10) and the 32-bit multi-core single chip processor (1), and the IGBT driving adapter plate (10) is connected with an IGBT module of the high-frequency inverter circuit;
the high-frequency inverter circuit comprises a breaker QF1, an alternating current contactor KM1, a reactor Z1 and a three-phase rectifier bridge TD1 which are sequentially connected, wherein the output end of the three-phase rectifier bridge TD1 is connected with the input end of an IGBT inverter loop, the output end of the IGBT inverter loop is connected with a primary coil of a boosting transformer TR1, a secondary coil of the boosting transformer TR1 is connected with the input end of a diode rectifier circuit DR1, the output end of the diode rectifier circuit is connected with the input end of an isolating switch SA3, and the output end of an isolating switch SA3 is connected with a dust remover ESP;
a filter capacitor C1 is connected in parallel between the three-phase rectifier bridge TD1 and the IGBT inverter circuit, IBGT modules D1 and D2 of the IGBT inverter circuit, D3 and D4 respectively form a semi-controlled bridge circuit structure, a resonant capacitor C2 is connected in series between the output end of the semi-controlled bridge circuit structure formed by D1 and D2 and the input end of the primary coil of the boosting transformer TR1, and the resonant capacitor C2 and the primary coil of the boosting transformer TR1 form a series resonant circuit.
2. The high-voltage and low-voltage integrated high-frequency intelligent control system for dust removal according to claim 1, wherein two ends of the alternating current contactor KM1 are connected in parallel with a resistor R1, R2 and R3 respectively.
3. The high-low voltage integrated high-frequency intelligent control system for dust removal according to claim 1, wherein the input terminal of the ac contactor KM1 is further connected in parallel with a single-phase miniature circuit breaker QF2, the output terminal of the single-phase miniature circuit breaker QF2 is connected with the primary winding of an isolation transformer T1, the secondary winding of the isolation transformer T1 is connected with the input terminal of a switching power supply T2, and the output terminal of the switching power supply T2 is used for respectively supplying power to the high-low voltage integrated high-frequency intelligent controller and the switching value input signal (8) and the switching value output signal (9); the input end of the switching power supply T2 is connected in parallel with a switching power supply T1, and the output end of the switching power supply T1 supplies power to the IGBT driving adapter plate (10).
4. The high-voltage and low-voltage integrated high-frequency intelligent control system for dust removal as claimed in claim 1, wherein the output terminal of the breaker QF1 is connected in parallel with an ac contactor KM2, the output terminal of the ac contactor KM2 is connected with the input terminal of a thermal protection relay FR, and the output terminal of the thermal protection relay FR is connected with a fan M1.
5. The integrated high-frequency intelligent control system for high and low voltage dust removal according to claim 1, wherein the switching value input signal (8) comprises a start-stop signal, a contactor feedback signal, a pre-charging feedback signal, an isolation switch interlocking signal, a negative striking feedback signal, a positive striking feedback signal, an insulator heating feedback signal, a hopper heating feedback signal, an auxiliary 1 feedback signal, an auxiliary 2 feedback signal, an oil level feedback signal and a fan feedback signal; the switching value output signals (9) comprise contactor control signals, pre-charging output signals, alarm signals, tripping signals, negative striking signals, positive striking signals, insulator heating signals and ash bucket heating signals; and the output ends of the switching value output signals (9) are respectively connected with relays for isolating the switching value output signals (9).
6. The high-low voltage integrated high-frequency intelligent control system for dust removal according to claim 5, wherein a current-limiting resistor and a voltage-dividing resistor are connected between the switching value input signal (8) and the 32-bit multi-core single-chip processor (1) and then connected to an input end of an optical coupler, and an inverting diode is connected in parallel to the input end of the optical coupler.
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