CN110554293A - partial discharge signal processing device - Google Patents
partial discharge signal processing device Download PDFInfo
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- CN110554293A CN110554293A CN201810551691.2A CN201810551691A CN110554293A CN 110554293 A CN110554293 A CN 110554293A CN 201810551691 A CN201810551691 A CN 201810551691A CN 110554293 A CN110554293 A CN 110554293A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
Abstract
the invention discloses a partial discharge signal processing device, which comprises a band-pass filter circuit, a first frequency mixing circuit, a stochastic resonance processing module and a second frequency mixing circuit, wherein the input end of the band-pass filter circuit is used as the input end of the partial discharge signal processing device; the output end of the band-pass filter circuit is electrically connected with the input end of the first mixing circuit; a carrier input end of the first mixing circuit inputs a carrier signal; the output end of the first mixing circuit is electrically connected with the input end of the stochastic resonance processing module; the output end of the stochastic resonance processing module is electrically connected with the input end of the second mixing circuit; the carrier input end of the second mixing circuit inputs carrier signals, and the output end of the second mixing circuit is used as the output end of the partial discharge signal processing device. The invention improves the signal-to-noise ratio, reduces the hardware overhead and ensures the real and effective analysis and judgment of the partial discharge signal by the stochastic resonance principle of the partial discharge signal containing noise through the stochastic resonance processing module.
Description
Technical Field
the invention relates to the field of signal anti-interference devices, in particular to a partial discharge signal processing device.
Background
the partial discharge test has higher sensitivity. For newly designed and manufactured high-voltage electrical equipment, weak links in insulation can be found in time through partial discharge measurement, errors in design and manufacturing processes and improper use of materials are prevented, the method is an important method for identifying product insulation or equipment operation reliability, and equipment defects which cannot be found in a withstand voltage test can be found. Partial discharge testing is one of the important items of preventive testing of current power equipment. GIS is a gas insulated fully-enclosed combined electrical apparatus, which is an important device of an electric power system, and GIS needs to be maintained rarely due to high sealing performance, but once a fault occurs, the field intensity inside the GIS is high, so that partial power failure in all regions is caused, even casualties are possibly caused, and up to now, many GIS substation accidents caused by GIS insulation faults occur in China. The main cause of the failure of the GIS device is the deterioration of the insulation performance, and when the deterioration of the insulation performance does not penetrate through the insulation medium, the defects are difficult to be found by the conventional preventive test means, and at this time, partial discharge often occurs in the insulation medium of the device, and the GIS partial discharge detection method can be roughly classified into an acoustic method, a chemical method, a pulse current method and an ultrahigh frequency method. The ultrahigh frequency method has become a main method in the existing GIS partial discharge detection technology because of the advantages of strong anti-interference capability, high sensitivity, good real-time performance and capability of fault location. The GIS ultrahigh frequency partial discharge test has the frequency range of about 300M-3GHZ, and the discharge type, the discharge strength, the partial discharge point, the propagation path and the like of equipment can be diagnosed by analyzing the ultrahigh frequency partial discharge signal. In the partial discharge test of equipment such as GIS or switch cabinet. Because the work site is easily influenced by electromagnetic interference, such as radio, lamp tube flicker, site construction, subway interference and the like, high-strength noise is generated, real partial discharge signals are annihilated, and the test is inaccurate. Even if partial discharge occurs in the equipment many times, the tester cannot adopt the partial discharge tester to test.
disclosure of Invention
the invention overcomes the defect of serious noise of the existing partial discharge signal and provides a novel partial discharge signal processing device. The invention improves the signal-to-noise ratio, reduces the hardware overhead and ensures the real and effective analysis and judgment of the partial discharge signal by the stochastic resonance principle of the partial discharge signal containing noise through the stochastic resonance processing module.
in order to solve the technical problems, the technical scheme of the invention is as follows:
a partial discharge signal processing device comprises a band-pass filter circuit, a first mixer circuit, a stochastic resonance processing module, and a second mixer circuit,
the stochastic resonance processing module is used for improving the signal-to-noise ratio of the partial discharge signal containing noise by the stochastic resonance principle;
the input end of the band-pass filter circuit is used as the input end of the partial discharge signal processing device, and the input end of the band-pass filter circuit receives a partial discharge signal containing noise; the output end of the band-pass filter circuit is electrically connected with the input end of the first mixing circuit;
A carrier signal is input to a carrier input end of the first mixing circuit;
the output end of the first mixing circuit is electrically connected with the input end of the stochastic resonance processing module;
the output end of the stochastic resonance processing module is electrically connected with the input end of the second mixing circuit;
and a carrier input end of the second mixing circuit inputs a carrier signal, and an output end of the second mixing circuit is used as an output end of the partial discharge signal processing device.
the working process of the invention is as follows: the partial discharge signal frequency band noise filtering circuit filters partial discharge signal frequency band noise, then reduces partial discharge signal frequency through the first mixing circuit, and improves partial discharge signal to noise ratio through the stochastic resonance processing module. And then the partial discharge signal with the original frequency is recovered through a second frequency mixing circuit.
in a preferred embodiment, the first mixer circuit comprises an AD835, a first resistor, a second resistor, and a high-pass filter sub-circuit, wherein,
the Y1 pin of the AD835 is used as the input end of the first mixing circuit;
the X1 pin of the AD835 is used as the carrier input end of the first mixing circuit;
the VN pin of the AD835 is connected with a negative voltage;
the Z pin of the AD835 is electrically connected with one end of the first resistor;
the other end of the first resistor is grounded;
the Z pin of the AD835 is electrically connected with one end of the second resistor;
The other end of the second resistor is electrically connected with a W pin of the AD 835;
the VP pin of the AD835 is connected with a positive voltage;
the Y2 pin of the AD835 is grounded;
the X2 pin of the AD835 is grounded;
and the W pin of the AD835 is electrically connected with the input end of the high-pass filter sub-circuit, and the output end of the high-pass filter sub-circuit is used as the output end of the first mixing circuit.
in a preferred embodiment, the high-pass filter sub-circuit includes a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a first operational amplifier, wherein,
one end of the third resistor is used as the input end of the high-pass filter sub-circuit, and the other end of the third resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the other end of the first capacitor is electrically connected with the inverting input end of the first operational amplifier;
the other end of the fourth resistor is electrically connected with the non-inverting input end of the first operational amplifier;
The other end of the fourth resistor is electrically connected with one end of the second capacitor;
The other end of the second capacitor is grounded;
the other end of the first capacitor is electrically connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is used as the output end of the high-pass filter sub-circuit.
in a preferred embodiment, the stochastic resonance processing module comprises an adder, an integrating circuit, a first multiplying circuit, a second multiplying circuit, a first amplifying circuit, a second amplifying circuit, and an inverter,
the first input end of the adder is used as the input end of the stochastic resonance processing module, and the second input end of the adder is electrically connected with the output end of the first amplifying circuit;
the third input end of the adder is electrically connected with the output end of the second amplifying circuit;
The output end of the adder is electrically connected with the input end of the integrating circuit;
the output end of the integrating circuit is electrically connected with the first input end of the second multiplying circuit;
the output end of the integrating circuit is electrically connected with the first input end of the first multiplying circuit;
The output end of the integrating circuit is electrically connected with the second input end of the first multiplying circuit;
The output end of the first multiplying circuit is electrically connected with the second input end of the second multiplying circuit;
the output end of the second multiplying circuit is electrically connected with the input end of the first amplifying circuit;
the output end of the integrating circuit is electrically connected with the input end of the phase inverter;
the output end of the phase inverter is electrically connected with the input end of the second amplifying circuit, and the output end of the phase inverter is used as the output end of the stochastic resonance processing module.
in a preferred embodiment, the inverter includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second operational amplifier, a third operational amplifier, and a third capacitor, wherein,
one end of the fifth resistor is used as the input end of the inverter, and the other end of the fifth resistor is electrically connected with one end of the third capacitor;
The other end of the fifth resistor is electrically connected with the inverting input end of the second operational amplifier;
the other end of the fifth capacitor is electrically connected with the output end of the second operational amplifier;
one end of the sixth resistor is electrically connected with the non-inverting input end of the second operational amplifier;
the other end of the sixth resistor is grounded;
the output end of the second operational amplifier is electrically connected with one end of a seventh resistor;
the other end of the seventh resistor is electrically connected with the inverting input end of the third operational amplifier;
The other end of the seventh resistor is electrically connected with one end of the eighth resistor;
The non-inverting input end of the third operational amplifier is electrically connected with one end of a ninth resistor;
The other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with the output end of the third operational amplifier, and the output end of the third operational amplifier is used as the output end of the phase inverter.
in a preferred embodiment, the adder includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a fourth operational amplifier, wherein,
One end of the tenth resistor is used as a first input end of the adder, and the other end of the tenth resistor is electrically connected with one end of the thirteenth resistor;
one end of the eleventh resistor is used as a second input end of the adder, and the other end of the eleventh resistor is electrically connected with one end of the thirteenth resistor;
one end of the twelfth resistor is used as a third input end of the adder, and the other end of the twelfth resistor is electrically connected with one end of the thirteenth resistor;
the non-inverting input end of the fourth operational amplifier is electrically connected with one end of the thirteenth resistor;
the other end of the thirteenth resistor is grounded;
one end of the fourteenth resistor is grounded;
the other end of the fourteenth resistor is electrically connected with the inverting input end of the fourth operational amplifier;
The other end of the fourteenth resistor is electrically connected with one end of the fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with the output end of the fourth operational amplifier, and the output end of the fourth operational amplifier is used as the output end of the adder.
in a preferred embodiment, if R14// R15= R10// R11// R12 in the resistance value, the thirteenth resistor may not be provided.
in a preferred embodiment, the band-pass filter circuit includes a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourth capacitor, a fifth capacitor, and a fifth operational amplifier, wherein,
one end of the sixteenth resistor is used as the input end of the band-pass filter circuit, and the other end of the sixteenth resistor is electrically connected with one end of the fourth capacitor;
the other end of the fourth capacitor is grounded;
the other end of the sixteenth resistor is electrically connected with one end of the fifth capacitor;
The other end of the fifth capacitor is electrically connected with one end of a seventeenth resistor;
the other end of the seventeenth resistor is grounded;
the other end of the fifth capacitor is electrically connected with the non-inverting input end of the fifth operational amplifier;
the other end of the sixteenth resistor is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with the output end of the fifth operational amplifier;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a nineteenth resistor;
the other end of the nineteenth resistor is grounded;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a twentieth resistor;
The other end of the twentieth resistor is electrically connected with the output end of the fifth operational amplifier, and the output end of the fifth operational amplifier is used as the output end of the band-pass filter circuit.
in a preferred embodiment, the high-pass filter sub-circuit includes a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a sixth operational amplifier,
one end of the sixth capacitor is used as the input end of the high-pass filter sub-circuit, and the other end of the sixth capacitor is electrically connected with one end of the twenty-first resistor;
the other end of the twenty-first resistor is grounded;
the other end of the sixth capacitor is electrically connected with one end of the seventh capacitor;
the other end of the seventh capacitor is electrically connected with the inverting input end of the sixth operational amplifier;
The other end of the seventh capacitor is electrically connected with one end of the twenty-second resistor;
the other end of the sixth capacitor is electrically connected with one end of the eighth capacitor;
the other end of the eighth capacitor is electrically connected with the output end of the sixth operational amplifier;
one end of the twenty-third resistor is electrically connected with the non-inverting input end of the sixth operational amplifier;
the other end of the twenty-third resistor is grounded;
the other end of the twenty-second resistor is electrically connected with the output end of the sixth operational amplifier, and the output end of the sixth operational amplifier is used as the output end of the high-pass filter sub-circuit.
compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention improves the signal-to-noise ratio, reduces the hardware overhead and ensures the real and effective analysis and judgment of the partial discharge signal by the stochastic resonance principle of the partial discharge signal containing noise through the stochastic resonance processing module.
drawings
FIG. 1 is a block diagram of an embodiment.
FIG. 2 is a graph of a stochastic resonance processing module of an embodiment.
Detailed Description
the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
It will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
as shown in fig. 1, an apparatus for processing an partial discharge signal comprises a band-pass filter circuit, a first mixer circuit, a stochastic resonance processing module, and a second mixer circuit,
The stochastic resonance processing module is used for improving the signal-to-noise ratio of the partial discharge signal containing noise by the stochastic resonance principle;
The input end of the band-pass filter circuit is used as the input end of the partial discharge signal processing device, and the input end of the band-pass filter circuit receives a partial discharge signal containing noise; the output end of the band-pass filter circuit is electrically connected with the input end of the first mixing circuit;
a carrier input end of the first mixing circuit inputs a carrier signal;
the output end of the first mixing circuit is electrically connected with the input end of the stochastic resonance processing module;
The output end of the stochastic resonance processing module is electrically connected with the input end of the second mixing circuit;
The carrier input end of the second mixing circuit inputs carrier signals, and the output end of the second mixing circuit is used as the output end of the partial discharge signal processing device.
wherein, the first mixing circuit comprises an AD835, a first resistor, a second resistor and a high-pass filtering sub-circuit,
the Y1 pin of the AD835 is used as the input end of the first mixing circuit;
an X1 pin of the AD835 is used as a carrier input end of the first mixing circuit;
VN pin of AD835 is connected with negative voltage;
the Z pin of the AD835 is electrically connected with one end of the first resistor;
the other end of the first resistor is grounded;
the Z pin of the AD835 is electrically connected with one end of the second resistor;
the other end of the second resistor is electrically connected with a W pin of the AD 835;
the VP pin of the AD835 is connected with a positive voltage;
the Y2 pin of AD835 is grounded;
the X2 pin of AD835 is grounded;
the W pin of the AD835 is electrically connected with the input end of the high-pass filter sub-circuit, and the output end of the high-pass filter sub-circuit is used as the output end of the first mixing circuit.
wherein, the high-pass filtering sub-circuit comprises a third resistor, a fourth resistor, a first capacitor, a second capacitor and a first operational amplifier,
one end of the third resistor is used as the input end of the high-pass filter sub-circuit, and the other end of the third resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the other end of the first capacitor is electrically connected with the inverting input end of the first operational amplifier;
the other end of the fourth resistor is electrically connected with the non-inverting input end of the first operational amplifier;
The other end of the fourth resistor is electrically connected with one end of the second capacitor;
The other end of the second capacitor is grounded;
the other end of the first capacitor is electrically connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is used as the output end of the high-pass filter sub-circuit.
wherein, as shown in FIG. 2, the stochastic resonance processing module comprises an adder, an integrating circuit, a first multiplying circuit, a second multiplying circuit, a first amplifying circuit, a second amplifying circuit, and an inverter,
The first input end of the adder is used as the input end of the stochastic resonance processing module, and the second input end of the adder is electrically connected with the output end of the first amplifying circuit;
the third input end of the adder is electrically connected with the output end of the second amplifying circuit;
the output end of the adder is electrically connected with the input end of the integrating circuit;
the output end of the integrating circuit is electrically connected with the first input end of the second multiplying circuit;
the output end of the integrating circuit is electrically connected with the first input end of the first multiplying circuit;
The output end of the integrating circuit is electrically connected with the second input end of the first multiplying circuit;
the output end of the first multiplying circuit is electrically connected with the second input end of the second multiplying circuit;
the output end of the second multiplying circuit is electrically connected with the input end of the first amplifying circuit;
the output end of the integrating circuit is electrically connected with the input end of the phase inverter;
the output end of the phase inverter is electrically connected with the input end of the second amplifying circuit, and the output end of the phase inverter is used as the output end of the stochastic resonance processing module.
wherein, the inverter comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second operational amplifier, a third operational amplifier and a third capacitor, wherein,
one end of the fifth resistor is used as the input end of the inverter, and the other end of the fifth resistor is electrically connected with one end of the third capacitor;
the other end of the fifth resistor is electrically connected with the inverting input end of the second operational amplifier;
the other end of the fifth capacitor is electrically connected with the output end of the second operational amplifier;
one end of the sixth resistor is electrically connected with the non-inverting input end of the second operational amplifier;
the other end of the sixth resistor is grounded;
the output end of the second operational amplifier is electrically connected with one end of the seventh resistor;
the other end of the seventh resistor is electrically connected with the inverting input end of the third operational amplifier;
the other end of the seventh resistor is electrically connected with one end of the eighth resistor;
the non-inverting input end of the third operational amplifier is electrically connected with one end of the ninth resistor;
the other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with the output end of the third operational amplifier, and the output end of the third operational amplifier is used as the output end of the phase inverter.
Wherein, the adder comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a fourth operational amplifier, wherein,
one end of the tenth resistor is used as a first input end of the adder, and the other end of the tenth resistor is electrically connected with one end of the thirteenth resistor;
one end of the eleventh resistor is used as a second input end of the adder, and the other end of the eleventh resistor is electrically connected with one end of the thirteenth resistor;
One end of the twelfth resistor is used as a third input end of the adder, and the other end of the twelfth resistor is electrically connected with one end of the thirteenth resistor;
the non-inverting input end of the fourth operational amplifier is electrically connected with one end of the thirteenth resistor;
the other end of the thirteenth resistor is grounded;
one end of the fourteenth resistor is grounded;
The other end of the fourteenth resistor is electrically connected with the inverting input end of the fourth operational amplifier;
the other end of the fourteenth resistor is electrically connected with one end of the fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with the output end of the fourth operational amplifier, and the output end of the fourth operational amplifier is used as the output end of the adder.
wherein, the band-pass filter circuit comprises a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourth capacitor, a fifth capacitor and a fifth operational amplifier, wherein,
one end of a sixteenth resistor is used as the input end of the band-pass filter circuit, and the other end of the sixteenth resistor is electrically connected with one end of a fourth capacitor;
the other end of the fourth capacitor is grounded;
the other end of the sixteenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with one end of the seventeenth resistor;
the other end of the seventeenth resistor is grounded;
the other end of the fifth capacitor is electrically connected with the non-inverting input end of the fifth operational amplifier;
the other end of the sixteenth resistor is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with the output end of the fifth operational amplifier;
the inverting input end of the fifth operational amplifier is electrically connected with one end of the nineteenth resistor;
The other end of the nineteenth resistor is grounded;
the inverting input end of the fifth operational amplifier is electrically connected with one end of the twentieth resistor;
the other end of the twentieth resistor is electrically connected with the output end of the fifth operational amplifier, and the output end of the fifth operational amplifier is used as the output end of the band-pass filter circuit.
the working process of the embodiment is as follows:
the partial discharge signal frequency band noise filtering circuit filters partial discharge signal frequency band noise, then reduces partial discharge signal frequency through the first mixing circuit, and improves partial discharge signal to noise ratio through the stochastic resonance processing module. And then the partial discharge signal with the original frequency is recovered by the second frequency mixing circuit, so that the anti-interference (signal-to-noise ratio improvement) operation of the partial discharge signal is realized.
the same or similar reference numerals correspond to the same or similar parts;
The terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A partial discharge signal processing device comprises a band-pass filter circuit, a first mixer circuit, a stochastic resonance processing module, and a second mixer circuit,
the stochastic resonance processing module is used for improving the signal-to-noise ratio of the partial discharge signal containing noise by the stochastic resonance principle;
the input end of the band-pass filter circuit is used as the input end of the partial discharge signal processing device, and the input end of the band-pass filter circuit receives a partial discharge signal containing noise; the output end of the band-pass filter circuit is electrically connected with the input end of the first mixing circuit;
a carrier signal is input to a carrier input end of the first mixing circuit;
the output end of the first mixing circuit is electrically connected with the input end of the stochastic resonance processing module;
the output end of the stochastic resonance processing module is electrically connected with the input end of the second mixing circuit;
and a carrier input end of the second mixing circuit inputs a carrier signal, and an output end of the second mixing circuit is used as an output end of the partial discharge signal processing device.
2. the partial discharge signal processing apparatus according to claim 1, wherein the first mixer circuit comprises an AD835, a first resistor, a second resistor, and a high-pass filter sub-circuit, wherein,
The Y1 pin of the AD835 is used as the input end of the first mixing circuit;
the X1 pin of the AD835 is used as the carrier input end of the first mixing circuit;
the VN pin of the AD835 is connected with a negative voltage;
the Z pin of the AD835 is electrically connected with one end of the first resistor;
the other end of the first resistor is grounded;
the Z pin of the AD835 is electrically connected with one end of the second resistor;
the other end of the second resistor is electrically connected with a W pin of the AD 835;
the VP pin of the AD835 is connected with a positive voltage;
The Y2 pin of the AD835 is grounded;
the X2 pin of the AD835 is grounded;
And the W pin of the AD835 is electrically connected with the input end of the high-pass filter sub-circuit, and the output end of the high-pass filter sub-circuit is used as the output end of the first mixing circuit.
3. the partial discharge signal processing apparatus according to claim 2, wherein the high-pass filter sub-circuit comprises a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a first operational amplifier, wherein,
one end of the third resistor is used as the input end of the high-pass filter sub-circuit, and the other end of the third resistor is electrically connected with one end of the fourth resistor;
the other end of the third resistor is electrically connected with one end of the first capacitor;
the other end of the first capacitor is electrically connected with the inverting input end of the first operational amplifier;
The other end of the fourth resistor is electrically connected with the non-inverting input end of the first operational amplifier;
the other end of the fourth resistor is electrically connected with one end of the second capacitor;
the other end of the second capacitor is grounded;
the other end of the first capacitor is electrically connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is used as the output end of the high-pass filter sub-circuit.
4. the partial discharge signal processing apparatus according to any one of claims 1 to 3, wherein the stochastic resonance processing module comprises an adder, an integrating circuit, a first multiplying circuit, a second multiplying circuit, a first amplifying circuit, a second amplifying circuit, and an inverter,
the first input end of the adder is used as the input end of the stochastic resonance processing module, and the second input end of the adder is electrically connected with the output end of the first amplifying circuit;
the third input end of the adder is electrically connected with the output end of the second amplifying circuit;
the output end of the adder is electrically connected with the input end of the integrating circuit;
The output end of the integrating circuit is electrically connected with the first input end of the second multiplying circuit;
the output end of the integrating circuit is electrically connected with the first input end of the first multiplying circuit;
the output end of the integrating circuit is electrically connected with the second input end of the first multiplying circuit;
the output end of the first multiplying circuit is electrically connected with the second input end of the second multiplying circuit;
The output end of the second multiplying circuit is electrically connected with the input end of the first amplifying circuit;
the output end of the integrating circuit is electrically connected with the input end of the phase inverter;
the output end of the phase inverter is electrically connected with the input end of the second amplifying circuit, and the output end of the phase inverter is used as the output end of the stochastic resonance processing module.
5. the partial discharge signal processing apparatus according to claim 4, wherein the inverter comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second operational amplifier, a third operational amplifier, and a third capacitor, wherein,
one end of the fifth resistor is used as the input end of the inverter, and the other end of the fifth resistor is electrically connected with one end of the third capacitor;
the other end of the fifth resistor is electrically connected with the inverting input end of the second operational amplifier;
the other end of the fifth capacitor is electrically connected with the output end of the second operational amplifier;
one end of the sixth resistor is electrically connected with the non-inverting input end of the second operational amplifier;
the other end of the sixth resistor is grounded;
the output end of the second operational amplifier is electrically connected with one end of a seventh resistor;
the other end of the seventh resistor is electrically connected with the inverting input end of the third operational amplifier;
the other end of the seventh resistor is electrically connected with one end of the eighth resistor;
the non-inverting input end of the third operational amplifier is electrically connected with one end of a ninth resistor;
The other end of the ninth resistor is grounded;
the other end of the eighth resistor is electrically connected with the output end of the third operational amplifier, and the output end of the third operational amplifier is used as the output end of the phase inverter.
6. the partial discharge signal processing apparatus according to claim 4, wherein the adder includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a fourth operational amplifier,
one end of the tenth resistor is used as a first input end of the adder, and the other end of the tenth resistor is electrically connected with one end of the thirteenth resistor;
one end of the eleventh resistor is used as a second input end of the adder, and the other end of the eleventh resistor is electrically connected with one end of the thirteenth resistor;
one end of the twelfth resistor is used as a third input end of the adder, and the other end of the twelfth resistor is electrically connected with one end of the thirteenth resistor;
The non-inverting input end of the fourth operational amplifier is electrically connected with one end of the thirteenth resistor;
the other end of the thirteenth resistor is grounded;
one end of the fourteenth resistor is grounded;
the other end of the fourteenth resistor is electrically connected with the inverting input end of the fourth operational amplifier;
the other end of the fourteenth resistor is electrically connected with one end of the fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with the output end of the fourth operational amplifier, and the output end of the fourth operational amplifier is used as the output end of the adder.
7. the partial discharge signal processing apparatus according to claim 5, wherein the adder includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a fourth operational amplifier,
one end of the tenth resistor is used as a first input end of the adder, and the other end of the tenth resistor is electrically connected with one end of the thirteenth resistor;
one end of the eleventh resistor is used as a second input end of the adder, and the other end of the eleventh resistor is electrically connected with one end of the thirteenth resistor;
one end of the twelfth resistor is used as a third input end of the adder, and the other end of the twelfth resistor is electrically connected with one end of the thirteenth resistor;
The non-inverting input end of the fourth operational amplifier is electrically connected with one end of the thirteenth resistor;
the other end of the thirteenth resistor is grounded;
one end of the fourteenth resistor is grounded;
the other end of the fourteenth resistor is electrically connected with the inverting input end of the fourth operational amplifier;
the other end of the fourteenth resistor is electrically connected with one end of the fifteenth resistor;
the other end of the fifteenth resistor is electrically connected with the output end of the fourth operational amplifier, and the output end of the fourth operational amplifier is used as the output end of the adder.
8. the partial discharge signal processing apparatus according to claim 4, wherein the band-pass filter circuit comprises a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourth capacitor, a fifth capacitor, and a fifth operational amplifier, wherein,
One end of the sixteenth resistor is used as the input end of the band-pass filter circuit, and the other end of the sixteenth resistor is electrically connected with one end of the fourth capacitor;
the other end of the fourth capacitor is grounded;
the other end of the sixteenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with one end of a seventeenth resistor;
the other end of the seventeenth resistor is grounded;
the other end of the fifth capacitor is electrically connected with the non-inverting input end of the fifth operational amplifier;
The other end of the sixteenth resistor is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with the output end of the fifth operational amplifier;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a nineteenth resistor;
the other end of the nineteenth resistor is grounded;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a twentieth resistor;
The other end of the twentieth resistor is electrically connected with the output end of the fifth operational amplifier, and the output end of the fifth operational amplifier is used as the output end of the band-pass filter circuit.
9. the partial discharge signal processing apparatus according to any one of claims 5 to 7, wherein the band-pass filter circuit comprises a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourth capacitor, a fifth capacitor, and a fifth operational amplifier, wherein,
one end of the sixteenth resistor is used as the input end of the band-pass filter circuit, and the other end of the sixteenth resistor is electrically connected with one end of the fourth capacitor;
The other end of the fourth capacitor is grounded;
the other end of the sixteenth resistor is electrically connected with one end of the fifth capacitor;
the other end of the fifth capacitor is electrically connected with one end of a seventeenth resistor;
the other end of the seventeenth resistor is grounded;
the other end of the fifth capacitor is electrically connected with the non-inverting input end of the fifth operational amplifier;
the other end of the sixteenth resistor is electrically connected with one end of the eighteenth resistor;
the other end of the eighteenth resistor is electrically connected with the output end of the fifth operational amplifier;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a nineteenth resistor;
The other end of the nineteenth resistor is grounded;
the inverting input end of the fifth operational amplifier is electrically connected with one end of a twentieth resistor;
The other end of the twentieth resistor is electrically connected with the output end of the fifth operational amplifier, and the output end of the fifth operational amplifier is used as the output end of the band-pass filter circuit.
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