CN-224233350-U - Residual electricity recycling circuit for post-spark bus

CN224233350UCN 224233350 UCN224233350 UCN 224233350UCN-224233350-U

Abstract

The utility model discloses a post-spark bus residual electricity recycling circuit which is applied to a power supply circuit of an electric dust collector, wherein the power supply circuit comprises a rectification voltage regulating module, a filtering inductor L, a bus filtering capacitor C0 and a load module, the input end of the rectification voltage regulating module is used for being connected with 380V alternating voltage, the first output end of the rectification voltage regulating module is connected with the first end of the filtering inductor L, the second end of the filtering inductor L is respectively connected with the first end of the bus filtering capacitor C0 and the first input end of the load module, the second output end of the rectification voltage regulating module and the second end of the bus filtering capacitor C0 are respectively connected with the second input end of the load module, and the residual electricity recycling circuit comprises a controller, a residual electricity recycling storage circuit, a residual electricity recycling storage control circuit and a residual electricity recycling control circuit.

Inventors

YANG DONG
LI YONG
ZHAO WEI
LI BIN
LIANG WU
ZHANG CHEN
YANG FAN

Assignees

大唐陕西发电有限公司西安热电厂

Dates

Publication Date: 20260512
Application Date: 20250123

Claims (10)

1. The utility model provides a surplus electricity recycling circuit of bus bar behind spark, its characterized in that, surplus electricity recycling circuit is applied to the power supply circuit of electrostatic precipitator, power supply circuit includes rectification voltage regulating module, filter inductance L, bus bar filter capacitor C0 and load module, rectification voltage regulating module's input is used for switching in 380V alternating voltage, rectification voltage regulating module's first output is connected with filter inductance L's first end, filter inductance L's second end is connected with bus bar filter capacitor C0's first end and load module's first input respectively, rectification voltage regulating module's second output and bus bar filter capacitor C0's second end are connected with load module's second input respectively; The residual electricity recycling circuit comprises a controller, a residual electricity recycling storage circuit, a residual electricity recycling storage control circuit and a residual electricity recycling control circuit; The first input end of the residual electricity recovery storage circuit is connected with the second end of the filter inductor L, the second input end of the residual electricity recovery storage circuit is connected with the first output end of the residual electricity recovery storage control circuit, and the third input end of the residual electricity recovery storage circuit is connected with the first output end of the residual electricity recycling control circuit; The second input end of the residual electricity recovery storage control circuit is connected with the first output end of the controller; The second input end of the residual electricity recycling control circuit is connected with the second output end of the controller, the second output end of the residual electricity recycling control circuit is connected with the first input end of the controller, and the third output end of the controller is connected with the input end of the rectifying and voltage regulating module.
2. The post-spark bus residual electricity recycling circuit according to claim 1, wherein the residual electricity recycling storage circuit comprises a first MOS transistor Q1, a second MOS transistor Q2, a first diode D1, a first capacitor Ch and a first reactor L1; the first end of the first MOS tube Q1 is connected with the first output end of the residual electricity recovery storage circuit, the second end of the first MOS tube Q1 is connected with the second output end of the rectifying and voltage regulating module, and the third end of the first MOS tube Q1 is respectively connected with the first end of the first diode D1 and the first end of the first reactor L1; The first end of the second MOS tube Q2 is connected with the first output end of the controller, the second end of the second MOS tube Q2 is respectively connected with the second end of the first diode D1 and the first end of the first capacitor Ch, and the third end of the second MOS tube Q2 is connected with the second end of the filter inductor L; The second end of the first reactor L1 is connected with the second end of the filter inductor L, and the second end of the first capacitor Ch is connected with the second output end of the rectifying and voltage regulating module.
3. The post-spark bus residual electricity recycling circuit according to claim 2, wherein the residual electricity recycling control circuit comprises a first voltage sampling and storing circuit, a first voltage sampling and tracking control circuit and a second voltage sampling and tracking control circuit; The first input end of the first voltage sampling storage circuit is connected with a first target connection end, the first output end of the first voltage sampling storage circuit is respectively connected with the first input end of the first voltage sampling tracking control circuit and the first input end of the second voltage sampling tracking control circuit, and the second output end of the first voltage sampling storage circuit is respectively connected with the second input end of the first voltage sampling tracking control circuit and the second input end of the second voltage sampling tracking control circuit; The third input end of the first voltage sampling tracking control circuit is connected with the first output end of the controller, the fourth input end of the first voltage sampling tracking control circuit is connected with the second output end of the controller, the first output end of the first voltage sampling tracking control circuit is connected with the first input end of the residual electricity recycling control circuit, and the second output end of the first voltage sampling tracking control circuit is connected with the first end of the first MOS tube Q1; The third input end of the second voltage sampling tracking control circuit is connected with the first output end of the controller, the fourth input end of the second voltage sampling tracking control circuit is connected with the third output end of the first voltage sampling tracking control circuit, the first output end of the second voltage sampling tracking control circuit is connected with the second input end of the first voltage sampling storage circuit, and the second output end of the second voltage sampling tracking control circuit is connected with the third input end of the first voltage sampling storage circuit; The first target connection end is a connection end between the second end of the first reactor L1 and the second end of the filter inductor L.
4. The post-spark bus residual electricity recycling circuit according to claim 3, wherein the first voltage sampling and storing circuit comprises a first low-pass filter, a first operational amplifier U1, a first triode VT1, a second operational amplifier U2 and a second triode VT2; The first low-pass filter comprises a third resistor R3 and a first capacitor C1, wherein a first end of the third resistor R3 is connected with the first target connection end, and a second end of the third resistor R3 is respectively connected with the first end of the first capacitor C1 and the non-inverting input end of the first operational amplifier U1; The inverting input end of the first operational amplifier U1 is connected with the output end of the first operational amplifier U1, the output end of the first operational amplifier U1 is respectively connected with the first end of a fourth resistor R4, the first input end of the first voltage sampling tracking control circuit and the first input end of the second voltage sampling tracking control circuit, and the second end of the fourth resistor R4 is connected with the first end of the first triode VT 1; The second end of the first triode VT1 is respectively connected with the first end of the fifth resistor R5, the first end of the second capacitor C2 and the non-inverting input end of the second operational amplifier U2, and the third end of the first triode VT1 is connected with the first output end of the second voltage sampling tracking control circuit; The inverting input end of the second operational amplifier U2 is connected with the output end of the second operational amplifier U2, and the output end of the second operational amplifier U2 is also respectively connected with the second input end of the first voltage sampling tracking control circuit and the second input end of the second voltage sampling tracking control circuit; A second end of the first capacitor C1 and a second end of the second capacitor C2 are grounded; The second end of the fifth resistor R5 is connected with the first end of the second triode VT2, the second end of the second triode VT2 is grounded, and the third end of the second triode VT2 is connected with the second output end of the second voltage sampling tracking control circuit.
5. The post-spark bus residual electricity recycling circuit according to claim 4, wherein the first voltage sampling tracking control circuit comprises a third operational amplifier U3, a first comparator U4, a first inverter U5, a first and gate U6 and a second and gate U7; The non-inverting input end of the third operational amplifier U3 is respectively connected with the first end of a sixth resistor R6 and the first end of a seventh resistor R7, the inverting input end of the third operational amplifier U3 is respectively connected with the first end of an eighth resistor R8 and the first end of a ninth resistor R9, the output end of the third operational amplifier U3 is respectively connected with the second end of the ninth resistor R9 and the first end of an eleventh resistor R11, the second end of the sixth resistor R6 is connected with the output end of the second operational amplifier U2, the second end of the seventh resistor R7 is grounded, the second end of the eighth resistor R8 is connected with the first end of an adjustable resistor RP2, the second end of the adjustable resistor RP2 is connected with a 5V voltage output end, the third end of the adjustable resistor RP2 is connected with the first end of a twelfth resistor R12, and the second end of the twelfth resistor R12 is grounded; The non-inverting input end of the first comparator U4 is respectively connected with the second end of the eleventh resistor R11 and the first end of the third capacitor C3, the inverting input end of the first comparator U4 is connected with the first end of the tenth resistor R10, the output end of the first comparator U4 is respectively connected with the first end of the thirteenth resistor R13 and the first end of the first inverter U5, the second end of the third capacitor C3 is grounded, the second end of the tenth resistor R10 is respectively electrically connected with the output end of the first operational amplifier U1 and the first input end of the residual electricity recycling control circuit, and the second end of the thirteenth resistor R13 is connected with the 5V voltage output end; The second end of the first inverter U5 is connected with the first input end of the first AND gate U6, the second input end of the first AND gate U6 is connected with the first output end of the controller, and the first output end of the controller is used for outputting a spark generation signal, and the output end of the first AND gate U6 is connected with the first input end of the second AND gate U7; The second input end of the second AND gate U7 is connected with the second output end of the controller, the second output end of the controller is used for outputting a constant-frequency PWM1 signal, and the output end of the second AND gate U7 is connected with the first end of the first MOS tube Q1.
6. The post-spark bus residual electricity recycling circuit according to claim 5, wherein the second voltage sampling tracking control circuit comprises a fourth operational amplifier U8, a third and gate U9, a first or gate U10 and a second inverter U11; The non-inverting input end of the fourth operational amplifier U8 is connected with the first end of a fifteenth resistor R15, the inverting input end of the fourth operational amplifier U8 is connected with the first end of a fourteenth resistor R14, the output end of the fourth operational amplifier U8 is respectively connected with the first input end of a third AND gate U9 and the first end of a sixteenth resistor R16, the second end of the fifteenth resistor R15 is connected with the output end of a second operational amplifier U2, the second end of the fourteenth resistor R14 is connected with the output end of a first operational amplifier U1, and the second end of the sixteenth resistor R16 is connected with the 5V voltage output end; The second input end of the third AND gate U9 is respectively connected with the third end of the first triode VT1 and the output end of the second inverter U11, and the output end of the third AND gate U9 is connected with the first input end of the first OR gate U10; The second input end of the first or gate U10 is connected to the output end of the first and gate U6, and the output end of the first or gate U10 is connected to the third end of the second triode VT 2.
7. The post-spark bus residual electricity recycling circuit according to claim 3, wherein the residual electricity recycling control circuit comprises a second voltage sampling storage circuit, a third voltage sampling tracking control circuit and a fourth voltage sampling tracking control circuit; The first input end of the second voltage sampling and storing circuit is connected with the second target connecting end, and the output end of the second voltage sampling and storing circuit is respectively connected with the first input end of the third voltage sampling and tracking control circuit and the first input end of the fourth voltage sampling and tracking control circuit; The second input end of the third voltage sampling tracking control circuit is connected with the first output end of the first voltage sampling tracking control circuit, the third input end of the third voltage sampling tracking control circuit is connected with the first output end of the controller, and the first output end of the third voltage sampling tracking control circuit is connected with the first end of the second MOS tube Q2; The second input end of the fourth voltage sampling tracking control circuit is connected with the second output end of the third voltage sampling tracking control circuit, the third input end of the fourth voltage sampling tracking control circuit is connected with the second output end of the controller, and the output end of the fourth voltage sampling tracking control circuit is connected with the second input end of the second voltage sampling storage circuit; The second target connection end is a connection end between the second end of the second MOS transistor Q2 and the second end of the first diode D1.
8. The post-spark bus residual electricity recycling circuit according to claim 7, wherein the second voltage sampling and storing circuit comprises a second low-pass filter and a fifth operational amplifier U12; The second low-pass filter comprises a twentieth resistor R20 and a fifth capacitor C5, wherein a first end of the twentieth resistor R203 is connected with the second target connection end, and a second end of the twentieth resistor R20 is respectively connected with the first end of the fifth capacitor C5 and the non-inverting input end of the fifth operational amplifier U12; The inverting input end of the fifth operational amplifier U12 is connected with the output end of the fifth operational amplifier U12, and the output end of the fifth operational amplifier U12 is respectively connected with the first end of the twenty-first resistor R21 and the first input end of the fourth voltage sampling tracking control circuit; the second end of the twenty-first resistor R21 is respectively connected with the first end of the twenty-second resistor R22, the first end of the sixth capacitor C6 and the first input end of the third voltage sampling tracking control circuit, the other end of the twenty-second resistor R22 is connected with the first end of the third triode VT3, the second end of the third triode VT3 is grounded, the third end of the third triode VT3 is connected with the output end of the fourth voltage sampling tracking control circuit, and the second end of the sixth capacitor C6 is grounded.
9. The post-spark bus residual electricity recycling circuit according to claim 8, wherein the third voltage sampling tracking control circuit comprises a sixth operational amplifier U13, a seventh operational amplifier U14 and a fourth and gate U15; The non-inverting input end of the sixth operational amplifier U13 is connected with the second end of the twenty-first resistor R21, the inverting input end of the sixth operational amplifier U13 is connected with the output end of the sixth operational amplifier U13, and the output end of the sixth operational amplifier U13 is respectively connected with the first end of the twenty-fourth resistor R24 and the second input end of the fourth voltage sampling tracking control circuit; the non-inverting input end of the seventh operational amplifier U14 is respectively connected with the second end of the twenty-fourth resistor R24 and the first end of the seventh capacitor C7, the inverting input end of the seventh operational amplifier U14 is connected with the first end of the twenty-third resistor R23, the output end of the seventh operational amplifier U14 is connected with the first input end of the fourth AND gate U15, the second end of the seventh capacitor C7 is grounded, and the second end of the twenty-third resistor R23 is connected with the output end of the first operational amplifier U1; The second input end of the fourth and gate U15 is connected to the first output end of the controller, and the output end of the fourth and gate U15 is connected to the first input end of the controller.
10. The post-spark bus residual electricity recycling circuit according to claim 9, wherein the fourth voltage sampling tracking control circuit comprises a second comparator U17, a fifth and gate U18 and a third inverter U19; The non-inverting input end of the second comparator U17 is connected with the first end of a fifteenth resistor R15, the inverting input end of the second comparator U17 is connected with the first end of a fourteenth resistor R14, the output end of the second comparator U17 is respectively connected with the first end of a sixteenth resistor R16 and the first input end of a fifth AND gate U18, the second end of the fifteenth resistor R15 is connected with the output end of a sixth operational amplifier U13, the second end of the fourteenth resistor R14 is connected with the output end of the fifth operational amplifier U12, and the second end of the sixteenth resistor R16 is connected with a 5V voltage output end; The second input end of the fifth and gate U18 is connected with the output end of the third inverter U19, and the output end of the fifth and gate U18 is connected with the third end of the third triode VT 3; an input end of the third inverter U19 is connected with a first output end of the controller.

Description

Residual electricity recycling circuit for post-spark bus Technical Field The utility model relates to the technical field of environmental protection, in particular to a post-spark bus residual electricity recycling circuit. Background With the continuous deep advancement of the environmental protection policy in China, the electric dust remover is used as a high-efficiency waste gas treatment device and is widely applied to the heavy industrial fields of thermal power plants, steel plants and the like. The electric dust collector makes the suspended particles in the air flow charged and adsorbed on the dust collecting electrode through the high-voltage electric field, so that the smoke dust is effectively removed, the concentration of the particles in the smoke is reduced, the air quality is improved, and the environmental pollution is reduced. The device has the advantages of high dust removal efficiency, low energy consumption, small equipment running resistance, strong large-scale flue gas treatment capacity and the like, and becomes an important industrial flue gas treatment facility. However, in the actual operation process of the electric dust remover, the electrodes (cathode and anode) in the device may generate spark discharge phenomenon under the influence of dust components, temperature and humidity in the airflow and other factors, so that an electric field in the electric dust remover is unstable. The discharge phenomenon can cause the instantaneous rise of bus voltage, if effective measures are not timely taken, serious damage can be caused to equipment, the dust removal efficiency is reduced, equipment faults are even caused, and the continuity of production and the environmental protection effect are affected. At present, domestic electric dust removal power supply equipment generally solves the problem of bus voltage rise after spark discharge in two ways. The first method is to connect a discharge resistor or controllable discharge loop in parallel to the bus filter capacitor end, and use these resistors or loops to consume the bus voltage during spark-out. The second method is that after the spark locking is finished, the inversion circuit is started and the load is connected, so that the bus voltage is reduced, and after the voltage is restored to a safe value, the rectification voltage regulating circuit at the front end is started. However, these existing solutions have a certain limitation, and cannot effectively solve the problems that the bus voltage rises too fast during the spark locking, the voltage cannot be consumed in real time or the system response is delayed, and still the stability and the dust removal effect of the equipment are affected. Therefore, in the operation process of the existing electric dust collector, the problems of rising bus voltage, untimely bus voltage consumption and response delay after spark discharge become urgent to be solved. Disclosure of utility model Therefore, the embodiment of the utility model provides a post-spark bus residual electricity recycling circuit, which is used for solving the problems of bus voltage rise, bus voltage untimely consumption and response delay after spark discharge in the operation process of an electric precipitator in the prior art. In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions: The utility model provides a surplus electricity recycling circuit of busbar after spark, surplus electricity recycling circuit is applied to the power supply circuit of electrostatic precipitator, power supply circuit includes rectification voltage regulating module, filter inductance L, busbar filter capacitance C0 and load module, rectification voltage regulating module's input is used for switching in 380V alternating voltage, rectification voltage regulating module's first output with filter inductance L's first end is connected, filter inductance L's second end is connected with busbar filter capacitance C0's first end and load module's first input respectively, rectification voltage regulating module's second output with busbar filter capacitance C0's second end is connected with load module's second input respectively; The residual electricity recycling circuit comprises a controller, a residual electricity recycling storage circuit, a residual electricity recycling storage control circuit and a residual electricity recycling control circuit; The first input end of the residual electricity recovery storage circuit is connected with the second end of the filter inductor L, the second input end of the residual electricity recovery storage circuit is connected with the first output end of the residual electricity recovery storage control circuit, and the third input end of the residual electricity recovery storage circuit is connected with the first output end of the residual electricity recycling control circuit; The second input end of the residual electri