Detection simulation method, detection circuit and detection system for broadband partial discharge

Abstract

The invention discloses a broadband partial discharge detection simulation method, a detection circuit and a detection system, and belongs to the technical field of partial discharge signal detection. According to the broadband partial discharge detection simulation method, the sensing model, the analog signal conditioning model, the digital processing model and the shape generation model are established, the broadband impedance unit is utilized, and the broadband detection algorithm and the signal acquisition algorithm are combined, so that the microscopic characteristics of partial discharge and interference pulses can be truly reflected; partial discharge detection in a strong interference environment can be realized, and the operation insulation condition of power equipment can be accurately evaluated, so that the safety and reliability of a power grid system are improved. Furthermore, a plurality of simulation models are constructed, electric signals are processed, detection and virtual simulation of broadband partial discharge are realized, and a credible detection result is obtained, so that the method can be used for structural circuit design analysis and detection effect verification of partial discharge detection equipment, the research and development period can be effectively shortened, manpower and manufacturing cost can be reduced, and the method is suitable for popularization and application. The research and development efficiency is high.

Description

Technical Field

[0001] The invention relates to a broadband partial discharge detection simulation method, a detection circuit and a detection system, and belongs to the technical field of partial discharge signal detection. Background Art

[0002] The current GB / T7354 standard defines that the upper limit frequency of the signal output by the detection impedance coupling is less than or equal to 1MHz, that is, the frequency after standard impedance coupling, modulation, and output is within 1MHz. Although some microscopic waveforms and some necessary information of the signal can be reflected in this frequency band, the output signal has a narrow frequency band and a small amount of information, making it difficult to distinguish between partial discharge signals and interference signals, and unable to truly restore the microscopic characteristics of the signal pulse, resulting in low partial discharge detection accuracy and poor detection effect.

[0003] Furthermore, the design and development of existing partial discharge detection equipment requires consideration of complex structural circuit design and repeated verification of detection results. The development cycle is long, the labor cost is high, and the development efficiency is low, which is not conducive to the development and use of new partial discharge detection equipment.

[0004] The information disclosed in this Background Art is only for understanding the background of the inventive concept and therefore it may include information that does not constitute the prior art. Summary of the invention

[0005] In view of the above problem or one of the above problems, an object of the present invention is to provide a detection simulation method for broadband partial discharge. By creating a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, and utilizing a broadband impedance unit in combination with a broadband detection algorithm and a signal acquisition algorithm, an original waveform of 10kHz to 80MHz and a broadband analog signal can be obtained. The signal has a wide bandwidth and a large amount of information, and can thus truly reflect the microscopic characteristics of partial discharge and interference pulses, thereby achieving anti-interference, and can detect weak signals in partial discharge phenomena earlier, can realize partial discharge detection in a strong interference environment, and can accurately evaluate the operating insulation condition of power equipment, thereby improving the safety and reliability of the power grid system.

[0006] In response to the above problem or one of the above problems, the second object of the present invention is to provide a detection simulation method for broadband partial discharge. By creating a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, a multi-simulation model structure is formed to process the electrical signal, thereby realizing broadband partial discharge detection and virtual simulation, and obtaining reliable detection results, which can be used for structural circuit design analysis of partial discharge detection equipment and verification of detection effects, thereby effectively shortening the R&D cycle, reducing manpower and manufacturing costs, improving R&D efficiency, and enhancing user experience.

[0007] In view of the above problem or one of the above problems, the third object of the present invention is to provide a broadband partial discharge detection circuit and a broadband partial discharge detection system, which are provided with a broadband impedance unit with a detection frequency band greater than 10kHz and less than or equal to 80MHz, and the bandwidth of the broadband detection channel is set to 10K to 80MHz, so that the measurement bandwidth of the broadband partial discharge detection circuit is greater than 80MHz; and an acquisition unit with a sampling frequency greater than or equal to 250M / s is provided, so that a broadband signal of 10kHz to 80MHz can be output, and the signal bandwidth is wide and the amount of information is large, so that the partial discharge signal and the interference signal can be truly restored, and the microscopic characteristics of the partial discharge and the interference pulse can be truly reflected, thereby realizing anti-interference partial discharge detection; and the detection sensitivity of the sensor unit can reach 0.1pC, so that weak signals in the partial discharge phenomenon can be discovered earlier, thereby realizing partial discharge detection in a strong interference environment, and accurately evaluating the insulation condition of the power equipment, thereby improving the safety and reliability of the power grid system.

[0008] To achieve one of the above purposes, the first technical solution of the present invention is:

[0009] A broadband partial discharge detection simulation method comprises the following steps:

[0010] Step 1, obtaining an electrical signal to be detected; the electrical signal includes original partial discharge and interference pulses;

[0011] Step 2: Using the sensor model created in advance and the broadband impedance unit, the electrical signal is restored to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz; the original waveform includes the partial discharge signal and the interference signal;

[0012] Step 3, using the analog signal conditioning model created in advance, according to the broadband detection algorithm, the original waveform is filtered and amplified to obtain a broadband analog signal of 10kHz to 80MHz;

[0013] Step 4: Using the previously created digital processing model, based on the signal acquisition algorithm, perform high-frequency acquisition, data extraction, time-domain and frequency-domain conversion, and digital filtering on the broadband analog signal to obtain a broadband digital signal; and perform time-domain, frequency-domain, and spectrum algorithm processing on the broadband digital signal based on the logic array FPGA to obtain broadband signal data;

[0014] Step 5, through the shape generation model created in advance, drawing is performed according to the broadband signal data to obtain the microscopic shape of the partial discharge signal and the interference signal, which is used to identify the original partial discharge and interference pulses in the electrical signal, and realize the detection and simulation of broadband partial discharge.

[0015] After continuous exploration and experiments, the present invention found that in partial discharge detection, the frequency bands of partial discharge signals and interference signals are mainly distributed in the range of 10kHz to 80MHz. The signal frequency band below 1MHz is narrow and has a small amount of information. The frequency band above 1MHz and below 80MHz covers a large number of partial discharge signals. In this frequency band, the signal microscopic waveform and sufficient information can be reflected with higher precision.

[0016] Therefore, the present invention creates a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, and utilizes a broadband impedance unit in combination with a broadband detection algorithm and a signal acquisition algorithm to obtain an original waveform of 10kHz to 80MHz and a broadband analog signal. The signal has a wide bandwidth and a large amount of information, and can effectively and truly restore the characteristic quantity of the signal, truly reflect the microscopic characteristics of partial discharge and interference pulses, and thus achieve anti-interference, and can detect weak signals in partial discharge phenomena earlier. The partial discharge detection has high accuracy and good detection effect, and can realize partial discharge detection in a strong interference environment, and can accurately evaluate the operating insulation condition of power equipment, thereby improving the safety and reliability of the power grid system.

[0017] Furthermore, the present invention forms a multi-simulation model structure by creating a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, processes electrical signals, realizes broadband partial discharge detection and virtual simulation, and obtains reliable detection results, which can be used for structural circuit design analysis of partial discharge detection equipment and verification of detection effects. Therefore, it can effectively shorten the R&D cycle, reduce manpower and manufacturing costs, improve R&D efficiency, and enhance user experience.

[0018] Microscopic shapes and microscopic characteristics include parameters such as duration, amplitude, rise and fall time, bandwidth, phase, etc.

[0019] As the preferred technical measures:

[0020] Step 2: Using the sensor model created in advance and the broadband impedance unit, the method of restoring the electrical signal to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz is as follows:

[0021] Step 21, connecting the inductor Lm, the capacitor Cm, and the resistor Rm in parallel to form an RLC type detection impedance equivalent circuit;

[0022] Step 22, connecting the RLC type detection impedance equivalent circuit and the coupling capacitor Ck in series to form a broadband impedance unit, and making the detection bandwidth of the broadband impedance unit greater than 10kHz and less than or equal to 80MHz, so as to capture partial discharge signals and interference signals with a frequency band distributed between 10kHz and 80MHz;

[0023] Step 23, inputting the electrical signal into the broadband impedance unit to generate a resonant voltage, and making the resonant frequency fall within the measurement range of the measurement system, and making the resonant capacitance Ct fall within the range of the tuning capacitance Ct′, so as to obtain an original waveform that can ensure high-fidelity coupled partial discharge signals in a broadband, wherein the original waveform includes partial discharge signals and interference signals;

[0024] The formula for calculating the resonant frequency f is as follows:

[0025]

[0026] Among them, Lm is the inductance, Ct is the resonant capacitance;

[0027] The calculation formula of resonant capacitance Ct is as follows:

[0028] Ct=Cx*Ck / (Cx+Ck),

[0029] Among them, Cx is the test capacitance, and Ck is the coupling capacitance.

[0030] As the preferred technical measures:

[0031] When conducting a transformer test, the tuning capacitor value range is as follows:

[0032] 6pF≤Ct′≤100pF

[0033] At the same time, the maximum current effective value is 30mA in an unbalanced circuit and 0.25A in a balanced circuit;

[0034] Alternatively, the tuning capacitor can be set in the following range:

[0035] 25pF≤Ct′≤400pF

[0036] At the same time, the maximum current effective value is 60mA in an unbalanced circuit and 0.5A in a balanced circuit;

[0037] Or / and, when conducting transformer testing, the tuning capacitor value range is as follows:

[0038] 100pF≤Ct′≤1500pF

[0039] At the same time, the maximum current effective value is 120mA in an unbalanced circuit and 1A in a balanced circuit;

[0040] Alternatively, the tuning capacitor can be set in the following range:

[0041] 400pF≤Ct′≤6000pF

[0042] At the same time, the maximum effective current is 250mA in an unbalanced loop and 2A in a balanced loop.

[0043] As the preferred technical measures:

[0044] Step 3, using the analog signal conditioning model created in advance, according to the broadband detection algorithm, the original waveform is filtered and amplified to obtain a broadband analog signal of 10kHz to 80MHz as follows:

[0045] Step 31, constructing a broadband detection channel with a bandwidth of 10KHz to 80MHz;

[0046] Step 32, using a broadband detection channel to filter and amplify the input partial discharge signal and interference signal to obtain sufficiently clear partial discharge signal and interference signal.

[0047] As the preferred technical measures:

[0048] Step 4, using the previously created digital processing model, based on the signal acquisition algorithm, high frequency acquisition, data extraction, time domain and frequency domain conversion and digital filtering processing are performed on the broadband analog signal to obtain a broadband digital signal; and the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm based on the logic array FPGA to obtain the broadband signal data as follows:

[0049] Step 41, construct an AD acquisition unit with an acquisition speed of 250M / s, perform high-frequency acquisition of broadband analog signals, achieve high-fidelity restoration of partial discharge signals and interference signals, and obtain high-frequency information of the signals;

[0050] Step 42, performing time domain and frequency domain conversion and digital filtering processing on the high frequency information of the signal to obtain a digitized broadband digital signal;

[0051] Step 43, based on the signal processing algorithm, using the programmable gate array circuit to construct a logic array FPGA;

[0052] Step 44, based on the logic array FPGA, the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm to obtain broadband signal data.

[0053] As the preferred technical measures:

[0054] Step 5, by using the shape generation model created in advance, drawing according to the broadband signal data, the method of obtaining the microscopic shape of the partial discharge signal and the interference signal is as follows:

[0055] Step 51, receiving broadband signal data calculated by the digital processing model;

[0056] Step 52, picking up broadband signal data at a high sampling rate of 250M / s to obtain shape parameter information that can reflect the original partial discharge and interference pulses;

[0057] Step 53, according to the shape parameter information, the partial discharge signal is plotted with a first color to obtain a partial discharge signal curve, and the interference signal is plotted with a second color to obtain an interference signal curve; the interference signal curve and the partial discharge signal curve have different colors;

[0058] Step 54, coupling the interference signal curve with the partial discharge signal curve to obtain a microscopic shape with distinct colors, thereby identifying the original partial discharge and the interference pulse.

[0059] To achieve one of the above purposes, the second technical solution of the present invention is:

[0060] A broadband partial discharge detection circuit comprises a sensing unit, an analog signal conditioning module, a digital processing module and a central processing module;

[0061] The sensing unit is connected to the analog signal conditioning module, the analog signal conditioning module is connected to the digital processing module, and the digital processing module is connected to the central processing module;

[0062] The sensing unit is provided with a broadband impedance unit with a detection frequency band greater than 10kHz and less than or equal to 80MHz, which is used to couple and detect various electrical signals generated by partial discharge of the device under test, and can truly restore partial discharge signals and interference signals;

[0063] The analog signal conditioning module is provided with a broadband detection channel with a bandwidth of 10K to 80MHz, which is used to filter and amplify the electrical signal so that the partial discharge signal and the interference signal can be clearly distinguished;

[0064] The digital processing module is provided with an acquisition unit with a sampling frequency greater than or equal to 250M / s, which is used to perform AD acquisition, data extraction, time domain and frequency domain conversion, and digital filtering processing on the partial discharge signal and the interference signal, so as to ensure that the partial discharge signal and the interference signal can be restored to the central processing module with high fidelity;

[0065] The central processing module is used to receive the data calculated by the digital processing module and to pick up broadband signals at a high sampling rate to reflect the microscopic shapes of the original partial discharge and interference pulses, thereby completing the identification of the original partial discharge and interference pulses.

[0066] The present invention is provided with a broadband impedance unit with a detection frequency band greater than 10kHz and less than or equal to 80MHz, and at the same time, the bandwidth of the broadband detection channel is set to 10K to 80MHz, so that the measurement bandwidth of the broadband partial discharge detection circuit is greater than 80MHz; and a collection unit with a sampling frequency greater than or equal to 250M / s is set, so that a broadband signal of 10kHz to 80MHz can be output, and the signal bandwidth is wide and the amount of information is large, so that the partial discharge signal and the interference signal can be truly restored, and the microscopic characteristics of the partial discharge and the interference pulse can be truly reflected, thereby realizing anti-interference partial discharge detection; and the detection sensitivity of the sensor unit can reach 0.1pC, so that weak signals in the partial discharge phenomenon can be discovered earlier, thereby realizing partial discharge detection in a strong interference environment, and accurately evaluating the operating insulation condition of the power equipment, thereby improving the safety and reliability of the power grid system.

[0067] As the preferred technical measures:

[0068] The detection frequency band of the broadband impedance unit is greater than 10kHz and less than or equal to 80MHz, and can truly restore the characteristic quantities of the partial discharge signal and the interference signal, and restore the partial discharge signal and the interference signal to the analog signal conditioning module with high fidelity, without modulating the partial discharge signal and the interference signal to 10kHz to 1MHz;

[0069] The broadband detection channel amplifies the input partial discharge signal and interference signal to make them clearly distinguishable.

[0070] The acquisition speed of the acquisition unit is 250M / s. The high-frequency acquisition speed ensures that the partial discharge signal and the interference signal are restored to the central processing module with high fidelity. The digital processing module is also provided with a logic array FPGA, so that the digitized partial discharge signal is processed by the programmable gate array circuit of the logic array FPGA for time domain parameters, frequency domain parameters and spectrum algorithm.

[0071] The central processing module is used to receive the data calculated by the digital processing module, and then display the partial discharge signal and interference signal obtained in the digital processing module on the PC side; broadband signal picking is performed through a high sampling rate of 250M / s to reflect the microscopic shape of the original partial discharge and interference pulses, and then digital filtering is performed to identify the original partial discharge and interference pulses.

[0072] To achieve one of the above purposes, the third technical solution of the present invention is:

[0073] A broadband partial discharge detection simulation method, using the above broadband partial discharge detection circuit, includes the following contents:

[0074] The electrical signal is input to the sensing unit;

[0075] The broadband impedance bandwidth of the sensor unit is 10kHz to 80MHz, and the partial discharge signal and interference signal obtained in the sensor unit are restored to the analog signal conditioning module with high fidelity;

[0076] The broadband detection channel in the analog signal conditioning module filters and amplifies the partial discharge signal and interference signal transmitted from the sensor unit and transmits them to the digital processing module;

[0077] The 250M / s acquisition unit in the digital processing module performs high-frequency acquisition, data extraction, time-domain and frequency-domain conversion, and digital filtering with a time resolution of 4ns and an acquisition depth of 12 bits, and then transmits the data to the logic array FPGA in the digital processing module. The logic array FPGA processes the digitized partial discharge signal with time-domain parameters, frequency-domain parameters, and spectrum algorithms, and finally transmits the partial discharge signal and interference signal to the central processing module after digital processing.

[0078] The central processing module performs detection and filtering and identification on the PC side, receives the data calculated by the digital processing module, and uses the operating software to draw and display the microscopic shapes of the original partial discharge and interference pulses, thereby identifying the original partial discharge and interference pulses.

[0079] The present invention can realize the detection impedance coupling output of a broadband signal of 10kHz to 80MHz during the partial discharge detection process, and can more accurately reflect the signal microscopic waveform and sufficient information. Therefore, the present invention can effectively and truly restore the characteristic quantity of the signal, and can identify the partial discharge signal and interference by analyzing the waveform microscopic characteristics, realize partial discharge detection in a strong interference environment, and can accurately evaluate the operating insulation condition of the power equipment.

[0080] To achieve one of the above purposes, the fourth technical solution of the present invention is:

[0081] A broadband partial discharge detection system, comprising one or more processors, and utilizing the one or more processors to implement the above-mentioned broadband partial discharge detection simulation method;

[0082] Or / and, it includes the above-mentioned broadband partial discharge detection circuit.

[0083] Compared with the prior art solutions, the present invention has the following beneficial effects:

[0084] After continuous exploration and experiments, the present invention creates a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, and utilizes a broadband impedance unit in combination with a broadband detection algorithm and a signal acquisition algorithm to obtain an original waveform of 10kHz to 80MHz and a broadband analog signal. The signal has a wide bandwidth and a large amount of information, thereby being able to truly reflect the microscopic characteristics of partial discharge and interference pulses, thereby achieving anti-interference, and being able to discover weak signals in partial discharge phenomena earlier. Therefore, the partial discharge detection has high accuracy and good detection effect, and can realize partial discharge detection in a strong interference environment, and can accurately evaluate the operating insulation condition of power equipment, thereby improving the safety and reliability of the power grid system.

[0085] Furthermore, the present invention forms a multi-simulation model structure by creating a sensing model, an analog signal conditioning model, a digital processing model, and a shape generation model, processes electrical signals, realizes broadband partial discharge detection and virtual simulation, and obtains reliable detection results, which can be used for structural circuit design analysis of partial discharge detection equipment and verification of detection effects. Therefore, it can effectively shorten the R&D cycle, reduce manpower and manufacturing costs, improve R&D efficiency, and enhance user experience.

[0086] Furthermore, the present invention is provided with a broadband impedance unit with a detection frequency band greater than 10kHz and less than or equal to 80MHz, and at the same time, the bandwidth of the broadband detection channel is set to 10K to 80MHz, so that the measurement bandwidth of the broadband partial discharge detection circuit is greater than 80MHz; and an acquisition unit with a sampling frequency greater than or equal to 250M / s is set, so that a broadband signal of 10kHz to 80MHz can be output, and the signal bandwidth is wide and the amount of information is large, so that the partial discharge signal and the interference signal can be truly restored, and the microscopic characteristics of the partial discharge and the interference pulse can be truly reflected, thereby realizing anti-interference partial discharge detection; and the detection sensitivity of the sensor unit can reach 0.1pC, so that weak signals in the partial discharge phenomenon can be discovered earlier, thereby realizing partial discharge detection in a strong interference environment, and accurately evaluating the operating insulation condition of the power equipment, thereby improving the safety and reliability of the power grid system. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 A schematic diagram of an RLC type broadband detection impedance loop of the present invention;

[0088] Figure 2 A schematic diagram of the external structure of the broadband impedance of the present invention;

[0089] Figure 3 A schematic diagram of a framework of a broadband partial discharge detection circuit of the present invention;

[0090] Figure 4 This is the waveform diagram of the original partial discharge signal under the oscilloscope of the present invention;

[0091] Figure 5 This is the waveform diagram of the original interference signal under the oscilloscope of the present invention;

[0092] Figure 6 It is a partial discharge signal waveform diagram obtained by an oscilloscope in the prior art;

[0093] Figure 7 The interference signal waveform diagram obtained by the prior art oscilloscope;

[0094] Figure 8 It is a microscopic waveform diagram of the partial discharge signal and interference signal collected by the present invention. DETAILED DESCRIPTION

[0095] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0096] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0098] A specific embodiment of the broadband partial discharge detection simulation method of the present invention:

[0099] A broadband partial discharge detection simulation method comprises the following steps:

[0100] Step 1, obtaining an electrical signal to be detected; the electrical signal includes original partial discharge and interference pulses;

[0101] Step 2: Using the sensor model created in advance and the broadband impedance unit, the electrical signal is restored to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz; the original waveform includes the partial discharge signal and the interference signal;

[0102] Step 3, using the analog signal conditioning model created in advance, according to the broadband detection algorithm, the original waveform is filtered and amplified to obtain a broadband analog signal of 10kHz to 80MHz;

[0103] Step 4: Using the previously created digital processing model, based on the signal acquisition algorithm, perform high-frequency acquisition, data extraction, time-domain and frequency-domain conversion, and digital filtering on the broadband analog signal to obtain a broadband digital signal; and perform time-domain, frequency-domain, and spectrum algorithm processing on the broadband digital signal based on the logic array FPGA to obtain broadband signal data;

[0104] Step 5, through the shape generation model created in advance, drawing is performed according to the broadband signal data to obtain the microscopic shape of the partial discharge signal and the interference signal, which is used to identify the original partial discharge and interference pulses in the electrical signal, and realize the detection and simulation of broadband partial discharge.

[0105] In this embodiment: Step 2, by using the sensor model created in advance and the broadband impedance unit, the method of restoring the electrical signal to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz is as follows:

[0106] Step 21, connecting the inductor Lm, the capacitor Cm, and the resistor Rm in parallel to form an RLC type detection impedance equivalent circuit;

[0107] Step 22, connecting the RLC type detection impedance equivalent circuit and the coupling capacitor Ck in series to form a broadband impedance unit, and making the detection bandwidth of the broadband impedance unit greater than 10kHz and less than or equal to 80MHz, so as to capture partial discharge signals and interference signals with a frequency band distributed between 10kHz and 80MHz;

[0108] Step 23, inputting the electrical signal into the broadband impedance unit to generate a resonant voltage, and making the resonant frequency fall within the measurement range of the measurement system, and making the resonant capacitance Ct fall within the range of the tuning capacitance Ct′, so as to obtain an original waveform that can ensure high-fidelity coupled partial discharge signals in a broadband, wherein the original waveform includes partial discharge signals and interference signals;

[0109] The formula for calculating the resonant frequency f is as follows:

[0110]

[0111] Among them, Lm is the inductance, Ct is the resonant capacitance;

[0112] The calculation formula of resonant capacitance Ct is as follows:

[0113] Ct=Cx*Ck / (Cx+Ck),

[0114] Among them, Cx is the test capacitance, and Ck is the coupling capacitance.

[0115] A broadband partial discharge detection simulation method as claimed in claim 2, in this embodiment:

[0116] When conducting a transformer test, the tuning capacitor value range is as follows:

[0117] 6pF≤Ct′≤100pF

[0118] At the same time, the maximum current effective value is 30mA in an unbalanced circuit and 0.25A in a balanced circuit;

[0119] Alternatively, the tuning capacitor can be set in the following range:

[0120] 25pF≤Ct′≤400pF

[0121] At the same time, the maximum current effective value is 60mA in an unbalanced circuit and 0.5A in a balanced circuit;

[0122] Or / and, when conducting transformer testing, the tuning capacitor value range is as follows:

[0123] 100pF≤Ct′≤1500pF

[0124] At the same time, the maximum current effective value is 120mA in an unbalanced circuit and 1A in a balanced circuit;

[0125] Alternatively, the tuning capacitor can be set in the following range:

[0126] 400pF≤Ct′≤6000pF

[0127] At the same time, the maximum effective current is 250mA in an unbalanced loop and 2A in a balanced loop.

[0128] In this embodiment: Step 3, using the analog signal conditioning model created in advance, filtering and amplifying the original waveform according to the broadband detection algorithm, the method for obtaining a broadband analog signal of 10kHz to 80MHz is as follows:

[0129] Step 31, constructing a broadband detection channel with a bandwidth of 10KHz to 80MHz;

[0130] Step 32, using a broadband detection channel to filter and amplify the input partial discharge signal and interference signal to obtain sufficiently clear partial discharge signal and interference signal.

[0131] In this embodiment: Step 4, using the digital processing model created in advance, based on the signal acquisition algorithm, high frequency acquisition, data extraction, time domain and frequency domain conversion and digital filtering processing are performed on the broadband analog signal to obtain a broadband digital signal; and the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm based on the logic array FPGA to obtain the broadband signal data. The method is as follows:

[0132] Step 41, construct an AD acquisition unit with an acquisition speed of 250M / s, perform high-frequency acquisition of broadband analog signals, achieve high-fidelity restoration of partial discharge signals and interference signals, and obtain high-frequency information of the signals;

[0133] Step 42, performing time domain and frequency domain conversion and digital filtering processing on the high frequency information of the signal to obtain a digitized broadband digital signal;

[0134] Step 43, based on the signal processing algorithm, using the programmable gate array circuit to construct a logic array FPGA;

[0135] Step 44, based on the logic array FPGA, the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm to obtain broadband signal data.

[0136] In this embodiment: Step 5, the method of obtaining the microscopic shapes of the partial discharge signal and the interference signal by drawing according to the broadband signal data through the shape generation model created in advance is as follows:

[0137] Step 51, receiving broadband signal data calculated by the digital processing model;

[0138] Step 52, picking up broadband signal data at a high sampling rate of 250M / s to obtain shape parameter information that can reflect the original partial discharge and interference pulses;

[0139] Step 53, according to the shape parameter information, the partial discharge signal is plotted with a first color to obtain a partial discharge signal curve, and the interference signal is plotted with a second color to obtain an interference signal curve; the interference signal curve and the partial discharge signal curve have different colors;

[0140] Step 54, coupling the interference signal curve with the partial discharge signal curve to obtain a microscopic shape with distinct colors, thereby identifying the original partial discharge and the interference pulse.

[0141] The first specific embodiment of the broadband partial discharge detection circuit of the present invention:

[0142] A broadband partial discharge detection circuit comprises a sensing unit, an analog signal conditioning module, a digital processing module and a central processing module.

[0143] The sensing unit is used to couple and detect various signals generated by partial discharge of the device under test. The sensing unit includes a broadband impedance, and the broadband impedance detection band is wider than the standard model 5 impedance, the measurement bandwidth is greater than 10kHz and less than or equal to 80MHz, and the partial discharge signal and interference signal frequency band are mainly distributed in 10kHz to 80MHz, which can effectively and truly restore the characteristic quantities of the partial discharge signal and the interference signal, and restore the partial discharge signal and the interference signal to the analog signal conditioning module with high fidelity, without modulating the signal to 10k to 1Mz.

[0144] The analog signal conditioning module is responsible for filtering, amplifying and other processing of the discharge signal received by the signal coupling unit. The analog signal conditioning module includes a broadband detection channel with a bandwidth of 10K to 80MHz. The broadband detection channel amplifies the input partial discharge signal and interference signal, making it easier to clearly distinguish the partial discharge signal and interference signal when they are subsequently input into the digital processing module.

[0145] The digital processing module is responsible for AD acquisition, data extraction, time domain and frequency domain conversion, digital filtering and other processing of the conditioned discharge signal. The digital processing module includes an AD acquisition unit and a logic array FPGA. The acquisition unit speed is 250M / s. The high-frequency acquisition speed ensures that the partial discharge signal and the interference signal are restored to the central processing module with high fidelity. The digitized partial discharge signal is subjected to algorithmic processing of parameters and graphs such as time domain and frequency domain by the logic array FPGA programmable gate array circuit. Multiple design functions can be integrated into one device using FPGA, and FPGA contains some pre-verified signal processing algorithm units. In addition, FPGA can very effectively implement some commonly used signal processing functions, and integrate multiple high-performance signal processing algorithms together, which can effectively reduce costs, risks and shorten development time. The final signal is transmitted by the back-end equipment to realize human-computer communication and data storage.

[0146] The central processing module is responsible for receiving the data calculated by the digital processing module, and then displaying the partial discharge signal and interference signal obtained in the digital processing module on the PC side. The broadband signal is picked up through a high sampling rate of 250M / s to reflect the microscopic shape of the original partial discharge and interference pulses, and then digital filtering is performed to identify the two.

[0147] The present invention connects the sensing unit to the analog signal conditioning module. The signal is sent from the sensing unit, and is conditioned by the broadband detection channel and the 250M / s acquisition unit in the analog signal conditioning module. The conditioned signal is then transmitted to the digital processing module. The digital processing module digitally processes the partial discharge signal and the interference signal and transmits them to the central processing module. The power is turned on, and the central processing module is connected to the wireless communication, that is, it maintains a communicative state for detection. Finally, the microscopic shapes of the original partial discharge and the interference pulse are fully reflected on the touch screen in the central processing module, so that the two can be identified.

[0148] Different from traditional pulse current partial discharge detection, the detection circuit of the present invention has a measurement bandwidth greater than 80MHz and a sampling rate of up to 250M / s, which can truly reflect the microscopic characteristics of partial discharge and interference pulses, and thus achieve anti-interference. The detection sensitivity of the sensor unit of the present invention can reach 0.1pC, which can detect weak signals in partial discharge phenomena earlier, realize partial discharge detection in a strong interference environment, and accurately evaluate the operating insulation condition of power equipment, thereby improving the safety and reliability of the power grid system.

[0149] A specific embodiment of the broadband impedance unit of the present invention:

[0150] The broadband impedance unit includes an RLC type broadband detection impedance loop and a broadband impedance external structure. As an important component of a broadband partial discharge detection circuit, it can ensure the original waveform of the high-fidelity coupled partial discharge signal in a broadband band.

[0151] In this embodiment, the RLC type broadband detection impedance loop includes a coupling capacitor and an RLC type detection impedance equivalent circuit. Figure 1 , Figure 1 In the figure, Cx is the sample capacitance, and Ck is the coupling capacitance. The dashed box is an RLC type detection impedance equivalent circuit, which is composed of inductor Lm, capacitor Cm, and resistor Rm in parallel. When the detection circuit is working, Cx, Ck, and Lm resonate, and a high resonant voltage will be generated on the detection impedance. The inductor Lm is mainly considered, and the capacitor Cm is very small and can be ignored in the calculation, so that the resonant frequency of the detection circuit falls within the measurement range of the measurement system.

[0152] The resonant frequency of the detection circuit is The resonant capacitance is Ct=Cx*Ck / (Cx+Ck). The wideband detection impedance panel has a range of tuning capacitance Ct′. The resonant capacitance Ct of the detection loop needs to fall within the range of tuning capacitance Ct′.

[0153] The impedance standard generally used in transformer testing is a tuning capacitor of 6pF≤Ct′≤100pF, with a maximum effective current value of 30mA in an unbalanced circuit and 0.25A in a balanced circuit, or a tuning capacitor of 25pF≤Ct′≤400pF, with a maximum effective current value of 60mA in an unbalanced circuit and 0.5A in a balanced circuit.

[0154] The impedance standard generally adopted in transformer testing is a tuning capacitance of 100pF≤Ct′≤1500pF, and a maximum effective current value of 120mA in an unbalanced circuit and 1A in a balanced circuit, or a tuning capacitance of 400pF≤Ct′≤6000pF, and a maximum effective current value of 250mA in an unbalanced circuit and 2A in a balanced circuit.

[0155] Select broadband impedance for detection so that the resonant frequency of the detection loop falls within the measurement range of the measurement system and then connects it to the broadband partial discharge detection circuit.

[0156] In this embodiment, the broadband impedance external structure is provided with a voltage output port, an input terminal, a PD terminal, a V terminal, and a ground terminal.

[0157] The voltage output port can be used to detect test voltage frequency, amplitude and other parameters; the input port can input signals, usually connected to the coupling capacitor output port; the PD port can output partial discharge signals, connected to the host measurement channel; the V port can output voltage signals, connected to the host voltage synchronization port; the ground port can be grounded with impedance protection, for details, see Figure 2 .

[0158] like Figure 3 As shown, the second specific embodiment of the broadband partial discharge detection circuit of the present invention is:

[0159] A broadband partial discharge detection circuit comprises a sensing unit 1, an analog signal conditioning module 2, a digital processing module 3, and a central processing module 4. The sensing unit 1 is connected to the analog signal conditioning module 2, the analog signal conditioning module 2 is connected to the digital processing module 3, and the digital processing module 3 is connected to the central processing module 4.

[0160] In this embodiment, the signal is input to the sensor unit 1, and can be converted into an electrical signal according to a certain rule and output to the analog signal conditioning module 2. The broadband impedance in the sensor unit 1 has a bandwidth of 10kHz to 80MHz, and the partial discharge signal and interference signal obtained in the sensor unit 1 are restored to the analog signal conditioning module 2 with high fidelity. The broadband detection channel in the analog signal conditioning module 2 filters, amplifies and processes the partial discharge signal and interference signal transmitted by the sensor unit and transmits them to the digital processing module 3. The 250M / s acquisition unit in the digital processing module 3 performs high-frequency acquisition, data extraction, time domain and frequency domain conversion, digital filtering and other processing with a time resolution of 4ns and an acquisition depth of 12 bits, and then transmits them to the logic array FPGA in the digital processing module 3. The logic array FPGA processes the digitized partial discharge signal with time domain, frequency domain and other parameters and spectrum algorithm processing, and finally transmits the partial discharge signal and interference signal to the central processing module 4 after digital processing. After turning on the power, the communication state is maintained for detection, filtering and identification are performed at the PC end in the central processing module 4, and the data calculated by the digital processing module is received. The operating software draws a picture to display the microscopic shape of the original partial discharge and the interference pulse, so as to identify the two.

[0161] A specific embodiment of the broadband partial discharge detection system of the present invention:

[0162] A broadband partial discharge detection system includes the above broadband partial discharge detection circuit. Further, the detection system of the present invention and the existing oscilloscope are used to perform partial discharge signal detection comparison, which includes the following contents:

[0163] like Figure 4 , Figure 5 The figure shows the original partial discharge signal waveform and the original interference signal waveform under the oscilloscope. It can be seen that the partial discharge signal waveform and the interference signal waveform are obviously different. Figure 6 , Figure 7 The figure shows the partial discharge signal waveform and the interference signal waveform obtained under the prior art oscilloscope. It can be seen that the partial discharge signal waveform and the interference signal waveform are roughly the same as the waveforms collected under the prior art. At present, the upper limit frequency of the signal output by the detection impedance coupling is less than or equal to 1MHz, that is, the frequency is above 10kHz and below 80MHz. After standard impedance coupling, modulation, and output frequency, it is within 1MHz. In this way, it is difficult to distinguish between partial discharge signals and interference signals in the output signal, and it is impossible to truly restore the signal pulse parameters such as duration, amplitude, rise and fall time, bandwidth, phase, etc.

[0164] The microscopic waveform diagram of the partial discharge signal and the interference signal collected by the broadband partial discharge detection system of the present invention can be found in Figure 8 ,from Figure 8 It can be seen from the waveforms in that the yellow waveform is the partial discharge signal waveform, and the gray waveform is the interference signal waveform. Therefore, the present invention can detect impedance coupling and output a wide-band signal of 10kHz to 80MHz, effectively and truly restore the characteristic quantity of the signal, and realize partial discharge detection in a strong interference environment.

[0165] Therefore, the present invention can restore the original waveform of the signal with high fidelity, identify partial discharge signals and interference by analyzing the microscopic characteristics of the waveform, realize partial discharge detection in a strong interference environment, and accurately evaluate the operating insulation condition of power equipment, thereby improving the safety and reliability of the power grid system.

[0166] An embodiment of a device applying the method of the present invention:

[0167] An electronic device comprising:

[0168] one or more processors;

[0169] A storage device for storing one or more programs;

[0170] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned wide-band partial discharge detection simulation method.

[0171] A computer medium embodiment using the method of the present invention:

[0172] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned broadband partial discharge detection simulation method.

[0173] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, and computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0174] The present application is described by flowcharts or / and block diagrams of the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each process or / and block in the flowchart or / and block diagram and the combination of the processes or / and blocks in the flowchart or / and block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart or / and block diagram. Figure 1 Process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0175] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 Process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0176] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 Process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention with equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A broadband partial discharge detection simulation method, characterized in that: The following steps are involved: Step 1, obtaining an electrical signal to be detected; the electrical signal includes original partial discharge and interference pulse; Step 2: Using the sensor model created in advance and the broadband impedance unit, the electrical signal is restored to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz; the original waveform includes the partial discharge signal and the interference signal; Step 3, using the analog signal conditioning model created in advance, according to the broadband detection algorithm, the original waveform is filtered and amplified to obtain a broadband analog signal of 10kHz to 80MHz; Step 4: Using the previously created digital processing model, based on the signal acquisition algorithm, perform high-frequency acquisition, data extraction, time-domain and frequency-domain conversion, and digital filtering on the broadband analog signal to obtain a broadband digital signal; and perform time-domain, frequency-domain, and spectrum algorithm processing on the broadband digital signal based on the logic array FPGA to obtain broadband signal data; Step 5, through the shape generation model created in advance, drawing is performed according to the broadband signal data to obtain the microscopic shape of the partial discharge signal and the interference signal, which is used to identify the original partial discharge and interference pulses in the electrical signal, and realize the detection and simulation of broadband partial discharge.

2. A broadband partial discharge detection simulation method as claimed in claim 1, characterized in that: Step 2: Using the sensor model created in advance and the broadband impedance unit, the method of restoring the electrical signal to a high-fidelity original waveform with a frequency range of 10kHz to 80MHz is as follows: Step 21, connecting the inductor Lm, the capacitor Cm, and the resistor Rm in parallel to form an RLC type detection impedance equivalent circuit; Step 22, connecting the RLC type detection impedance equivalent circuit and the coupling capacitor Ck in series to form a broadband impedance unit, and making the detection bandwidth of the broadband impedance unit greater than 10kHz and less than or equal to 80MHz, so as to capture partial discharge signals and interference signals with a frequency band distributed between 10kHz and 80MHz; Step 23, inputting the electrical signal into the broadband impedance unit to generate a resonant voltage, and making the resonant frequency fall within the measurement range of the measurement system, and making the resonant capacitance Ct fall within the range of the tuning capacitance Ct′, so as to obtain an original waveform that can ensure high-fidelity coupled partial discharge signals in a broadband, wherein the original waveform includes partial discharge signals and interference signals; The formula for calculating the resonant frequency f is as follows: Among them, Lm is the inductance, Ct is the resonant capacitance; The calculation formula of resonant capacitance Ct is as follows: Ct=Cx*Ck / (Cx+Ck), Among them, Cx is the test capacitance, and Ck is the coupling capacitance.

3. A broadband partial discharge detection simulation method as claimed in claim 2, characterized in that: When conducting a transformer test, the tuning capacitor value range is as follows: 6pF≤Ct′≤100pF At the same time, the maximum current effective value is 30mA in an unbalanced circuit and 0.25A in a balanced circuit; Alternatively, the tuning capacitor can be set in the following range: 25pF≤Ct′≤400pF At the same time, the maximum current effective value is 60mA in an unbalanced circuit and 0.5A in a balanced circuit; Or / and, when conducting transformer testing, the tuning capacitor value range is as follows: 100pF≤Ct′≤1500pF At the same time, the maximum current effective value is 120mA in an unbalanced circuit and 1A in a balanced circuit; Alternatively, the tuning capacitor can be set in the following range: 400pF≤Ct′≤6000pF At the same time, the maximum effective current is 250mA in an unbalanced loop and 2A in a balanced loop.

4. A broadband partial discharge detection simulation method as claimed in claim 1, characterized in that: Step 3, using the analog signal conditioning model created in advance, according to the broadband detection algorithm, the original waveform is filtered and amplified to obtain a broadband analog signal of 10kHz to 80MHz as follows: Step 31, constructing a broadband detection channel with a bandwidth of 10KHz to 80MHz; Step 32, using a broadband detection channel to filter and amplify the input partial discharge signal and interference signal to obtain sufficiently clear partial discharge signal and interference signal.

5. A broadband partial discharge detection simulation method as claimed in claim 1, characterized in that: Step 4, using the previously created digital processing model, based on the signal acquisition algorithm, high frequency acquisition, data extraction, time domain and frequency domain conversion and digital filtering processing are performed on the broadband analog signal to obtain a broadband digital signal; and the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm based on the logic array FPGA to obtain the broadband signal data as follows: Step 41, construct an AD acquisition unit with an acquisition speed of 250M / s, perform high-frequency acquisition of broadband analog signals, achieve high-fidelity restoration of partial discharge signals and interference signals, and obtain high-frequency information of the signals; Step 42, performing time domain and frequency domain conversion and digital filtering processing on the high frequency information of the signal to obtain a digitized broadband digital signal; Step 43, based on the signal processing algorithm, using the programmable gate array circuit to construct a logic array FPGA; Step 44, based on the logic array FPGA, the broadband digital signal is processed in the time domain, frequency domain and spectrum algorithm to obtain broadband signal data.

6. A broadband partial discharge detection simulation method as claimed in claim 1, characterized in that: Step 5, by using the shape generation model created in advance, drawing according to the broadband signal data, the method of obtaining the microscopic shape of the partial discharge signal and the interference signal is as follows: Step 51, receiving broadband signal data calculated by the digital processing model; Step 52, picking up broadband signal data at a high sampling rate of 250M / s to obtain shape parameter information that can reflect the original partial discharge and interference pulses; Step 53, according to the shape parameter information, the partial discharge signal is plotted with a first color to obtain a partial discharge signal curve, and the interference signal is plotted with a second color to obtain an interference signal curve; the interference signal curve and the partial discharge signal curve have different colors; Step 54, coupling the interference signal curve with the partial discharge signal curve to obtain a microscopic shape with distinct colors, thereby identifying the original partial discharge and the interference pulse.

7. A broadband partial discharge detection circuit, characterized in that: It includes a sensing unit, an analog signal conditioning module, a digital processing module and a central processing module; The sensing unit is connected to the analog signal conditioning module, the analog signal conditioning module is connected to the digital processing module, and the digital processing module is connected to the central processing module; The sensing unit is provided with a broadband impedance unit with a detection frequency band greater than 10kHz and less than or equal to 80MHz, which is used to couple and detect various electrical signals generated by partial discharge of the device under test, and can truly restore partial discharge signals and interference signals; The analog signal conditioning module is provided with a broadband detection channel with a bandwidth of 10K to 80MHz, which is used to filter and amplify the electrical signal so that the partial discharge signal and the interference signal can be clearly distinguished; The digital processing module is provided with an acquisition unit with a sampling frequency greater than or equal to 250M / s, which is used to perform AD acquisition, data extraction, time domain and frequency domain conversion, and digital filtering processing on the partial discharge signal and the interference signal, so as to ensure that the partial discharge signal and the interference signal can be restored to the central processing module with high fidelity; The central processing module is used to receive the data calculated by the digital processing module and to pick up broadband signals at a high sampling rate to reflect the microscopic shapes of the original partial discharge and interference pulses, thereby completing the identification of the original partial discharge and interference pulses.

8. A broadband partial discharge detection circuit as claimed in claim 7, characterized in that: The detection frequency band of the broadband impedance unit is greater than 10kHz and less than or equal to 80MHz, and can truly restore the characteristic quantities of the partial discharge signal and the interference signal, and restore the partial discharge signal and the interference signal to the analog signal conditioning module with high fidelity, without modulating the partial discharge signal and the interference signal to 10kHz to 1MHz; The broadband detection channel amplifies the input partial discharge signal and interference signal to make them clearly distinguishable. The acquisition speed of the acquisition unit is 250M / s. The high-frequency acquisition speed ensures that the partial discharge signal and the interference signal are restored to the central processing module with high fidelity. The digital processing module is also provided with a logic array FPGA, so that the digitized partial discharge signal is processed by the programmable gate array circuit of the logic array FPGA for time domain parameters, frequency domain parameters and spectrum algorithm. The central processing module is used to receive the data calculated by the digital processing module, and then display the partial discharge signal and interference signal obtained in the digital processing module on the PC side; broadband signal picking is performed through a high sampling rate of 250M / s to reflect the microscopic shape of the original partial discharge and interference pulses, and then digital filtering is performed to identify the original partial discharge and interference pulses.

9. A broadband partial discharge detection simulation method, characterized in that: A broadband partial discharge detection circuit as described in any one of claims 7 to 8 is used, wherein Includes the following: The electrical signal is input to the sensing unit; The broadband impedance bandwidth of the sensor unit is 10kHz to 80MHz, and the partial discharge signal and interference signal obtained in the sensor unit are restored to the analog signal conditioning module with high fidelity; The broadband detection channel in the analog signal conditioning module filters and amplifies the partial discharge signal and interference signal transmitted from the sensor unit and transmits them to the digital processing module; The 250M / s acquisition unit in the digital processing module performs high-frequency acquisition, data extraction, time-domain and frequency-domain conversion, and digital filtering with a time resolution of 4ns and an acquisition depth of 12 bits, and then transmits the data to the logic array FPGA in the digital processing module. The logic array FPGA processes the digitized partial discharge signal with time-domain parameters, frequency-domain parameters, and spectrum algorithms, and finally transmits the partial discharge signal and interference signal to the central processing module after digital processing. The central processing module performs detection and filtering and identification on the PC side, receives the data calculated by the digital processing module, and uses the operating software to draw and display the microscopic shapes of the original partial discharge and interference pulses, thereby identifying the original partial discharge and interference pulses.

10. A broadband partial discharge detection system, characterized in that: It includes one or more processors, and uses one or more processors to implement a broadband partial discharge detection simulation method as described in any one of claims 1 to 6; Or / and, it includes a broadband partial discharge detection circuit as described in any one of claims 7-9.

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