Multi-discharge source simulation method and device based on broadband radio frequency

Abstract

The invention discloses a multi-discharge source simulation method and device based on broadband radio frequency. The method comprises the following steps: collecting a time sequence atlas containing a typical partial discharge source and an interference source in partial discharge and interference tests; performing signal reconstruction on the time sequence map, converting the time sequence map into an editable digital signal, and generating a digital time sequence map of each type of partial discharge source / interference source; an arbitrary waveform generator is adopted to generate multiple paths of independent and controllable broadband radio frequency pulse signals according to the digital time sequence atlas; performing broadband power amplification on each path of broadband radio frequency pulse signal to generate a plurality of paths of amplified broadband radio frequency pulse signals; and deploying multiple paths of amplified broadband radio frequency pulse signals at different positions to simulate discharge sources at different positions. The anti-interference capability and the detection positioning precision of the radio frequency partial discharge detection device can be effectively tested and verified, the reliability and the detection accuracy of the detection device are improved, and a powerful guarantee is provided for safe and stable operation of a novel power system.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment state detection, and more particularly to a broadband radio frequency-based multi-discharge power source simulation method and device. Background Art

[0002] With the construction and development of new power systems, grids are increasingly demanding flexible controllability and the safe and reliable operation of power equipment. Insulation condition monitoring of key power equipment, such as converter transformers and GIS, has become particularly important. Partial discharge (PD) detection is a key indicator of the insulation condition of equipment. Broadband RF PD detection technology, with its high sensitivity and non-contact measurement, has become a key tool for PD detection. Substations and converter stations are subject to a large number of electromagnetic interference signals, and multiple PD sources may exist in real-world locations. This requires RF PD detection devices to be able to classify and accurately locate multiple PD signals. However, existing laboratory testing environments have the following shortcomings: 1) They can typically only simulate a single PD source signal, failing to replicate the complex substation environment with multiple PD sources and interference. 2) They lack precise control over the timing relationships of multiple signals, making it difficult to verify the classification capabilities of the detection device. 3) They cannot dynamically adjust the spatiotemporal distribution characteristics of multiple-source signals, making it difficult to effectively verify the accuracy of multiple-source location. 4) Existing signal generators have a limited output bandwidth (<100MHz), which does not match the frequency band of real PD RF signals. In summary, the existing laboratory test environment cannot fully reflect the performance of RF PD detection devices in actual complex environments. There is an urgent need to build an effective test environment to verify the anti-interference ability and detection positioning accuracy of RF PD detection devices. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a method and device for simulating a multi-discharge source based on broadband radio frequency.

[0004] According to one aspect of the present invention, a method for simulating a multi-amplifier source based on broadband radio frequency is provided, comprising:

[0005] Collect time series diagrams of typical partial discharge sources and interference sources during partial discharge and interference tests;

[0006] Reconstruct the time sequence diagram and convert it into editable digital signal to generate digital time sequence diagrams of various types of partial discharge sources / interference sources;

[0007] An arbitrary waveform generator is used to generate multiple independently controllable broadband RF pulse signals according to the digital timing diagram;

[0008] Performing broadband power amplification on each channel of broadband radio frequency pulse signals to generate multiple channels of amplified broadband radio frequency pulse signals;

[0009] Multiple amplified broadband RF pulse signals are deployed at different locations to simulate discharge sources at different locations.

[0010] Optionally, partial discharge and interference tests are performed on-site at the substation or in a laboratory, and

[0011] When the test is conducted at a substation, a broadband radio frequency sensor is used to collect the time series spectrum;

[0012] When the test is conducted in the laboratory, an equivalent discharge model is used to perform the pressure test, and then a broadband radio frequency sensor is used to collect the timing spectrum.

[0013] Optionally, the equivalent discharge model is any one of a spike discharge model, a particle discharge model, an air gap discharge model, a surface discharge model, a corona discharge model, and a suspension discharge model.

[0014] Optionally, the timing diagram is reconstructed and converted into an editable digital signal to generate digital timing diagrams of various types of partial discharge sources / interference sources, including:

[0015] Extract the waveform amplitude, generation time and phase information of each type of partial discharge source / interference source in the time series spectrum;

[0016] According to the waveform amplitude, generation time and phase information of each type of partial discharge source / interference source, a digital time sequence diagram of each type of partial discharge source / interference source is constructed.

[0017] Optionally, the broadband radio frequency pulse signal selects a double exponential decay pulse, which is specifically expressed as:

[0018] y(t)=A1e -λ1t +A2e -λ2t +C

[0019] Where A1 and A2 are amplitude coefficients; λ1 and λ2 are decay rate constants; C is the baseline or steady-state value; and t is the time variable.

[0020] According to another aspect of the present invention, a multi-discharge source simulation device based on broadband radio frequency is provided, comprising: a control calculation unit, a digital-to-analog conversion unit, an analog conditioning unit and a transmitting unit, wherein

[0021] The control and calculation unit is used to store and collect the time series graphs containing typical partial discharge sources and interference sources in partial discharge and interference tests, reconstruct the time series graphs, convert them into editable digital signals, and generate digital time series graphs of various types of partial discharge sources / interference sources;

[0022] The digital-to-analog conversion unit is used to generate multiple independently controllable broadband radio frequency pulse signals according to the digital timing diagram using an arbitrary waveform generator;

[0023] The analog conditioning unit is used to perform broadband power amplification on each channel of broadband RF pulse signals to generate multiple channels of amplified broadband RF pulse signals;

[0024] The transmitting unit is used to deploy multiple amplified broadband RF pulse signals at different locations to simulate discharge sources at different locations.

[0025] Optionally, the digital-to-analog conversion unit includes: a sequence generator, a clock generator, a digital-to-analog converter, a combined filter, and an output amplifier, wherein

[0026] The sequencer is used to arrange the waveform into multiple segments to create the required waveform and send it to the digital-to-analog converter;

[0027] The clock generator is used to control the timing of the waveform through an internal clock or an external clock, and output the waveform events to the digital-to-analog converter and memory in a specified order;

[0028] The digital-to-analog converter is used to convert the digital voltage value of the timing waveform into an analog voltage value, output a voltage step and send it to the combined filter;

[0029] The combined filter is used to filter out the harmonic components in the voltage step, obtain a smooth analog waveform and send it to the output amplifier;

[0030] The output amplifier is used to amplify the analog waveform and output a broadband RF pulse signal.

[0031] Optionally, the transmitter of the transmitting unit is any one of an omnidirectional biconical antenna, a logarithmic antenna and a rod antenna.

[0032] Therefore, the present invention proposes a broadband RF-based multi-discharge source simulation method. This method utilizes an arbitrary waveform generator to transmit multiple broadband RF pulse signals with different pulse waveforms (pulse width, amplitude, etc.) and different spatial positions according to various timing patterns. This method can simultaneously simulate multiple PD signals and interference signals in a laboratory or substation, providing a performance testing environment for RF PD detection devices, including signal detection, multi-source classification and identification, and positioning accuracy verification. This method can effectively test and verify the anti-interference capability and detection and positioning accuracy of RF PD detection devices, thereby standardizing and improving the reliability and detection accuracy of the detection devices, promoting the further development and application of RF PD detection technology, and providing strong guarantees for the safe and stable operation of new power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0034] Figure 1 1 is a flow chart of a broadband radio frequency based multi-amplifier source simulation method provided by an exemplary embodiment of the present invention;

[0035] Figure 2 1 is a schematic diagram of timing reconstruction based on main information of a discharge signal provided by an exemplary embodiment of the present invention;

[0036] Figure 3 is a timing diagram of a typical partial discharge source provided by an exemplary embodiment of the present invention;

[0037] Figure 4 is a timing diagram of a typical interference source provided by an exemplary embodiment of the present invention;

[0038] Figure 5 is a waveform diagram of a double exponential decay pulse signal under different parameters provided by an exemplary embodiment of the present invention;

[0039] Figure 6 is a gain curve of an analog conditioning unit provided by an exemplary embodiment of the present invention;

[0040] Figure 7 is a PRPD diagram for detecting each simulated discharge source provided by an exemplary embodiment of the present invention;

[0041] Figure 8 is a positioning diagram for detecting each simulated discharge source provided by an exemplary embodiment of the present invention;

[0042] Figure 9 1 is a schematic structural diagram of a broadband radio frequency based multi-discharge source simulation device provided by an exemplary embodiment of the present invention;

[0043] Figure 10 This is a basic principle block diagram of a digital-to-analog conversion unit provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0044] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0045] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0046] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0047] It should also be understood that, in the embodiments of the present invention, “a plurality of” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0048] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0049] In addition, the term "and / or" in this invention merely describes an association relationship between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this invention generally indicates that the related objects are in an "or" relationship.

[0050] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced with each other. For the sake of brevity, they will not be described one by one.

[0051] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0052] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0053] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0054] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] Figure 1 This is a flow chart of a method for simulating a multi-discharge source based on broadband radio frequency according to a first aspect of an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as Figure 1 As shown, the broadband RF-based multi-amplifier source simulation method 100 includes the following steps:

[0056] Step 101, collecting a time sequence diagram including typical partial discharge sources and interference sources in a partial discharge and interference test;

[0057] Step 102: reconstruct the time sequence spectrum and convert it into an editable digital signal to generate a digital time sequence spectrum of various types of partial discharge sources / interference sources;

[0058] Step 103, using an arbitrary waveform generator to generate multiple independently controllable broadband radio frequency pulse signals according to the digitized timing pattern;

[0059] Step 104, performing broadband power amplification on each channel of broadband radio frequency pulse signals to generate multiple channels of amplified broadband radio frequency pulse signals;

[0060] Step 105 : deploy multiple amplified broadband radio frequency pulse signals at different locations to simulate discharge sources at different locations.

[0061] Specifically, in response to the technical problems existing in the background technology, the present invention proposes a multi-discharge source simulation method based on broadband radio frequency. This method uses an arbitrary waveform generator to transmit multiple different pulse waveforms (pulse width, amplitude, etc.) and broadband radio frequency pulse signals of different spatial positions according to a variety of timing diagrams, thereby simulating multiple partial discharge signals and interference signals at the same time in a laboratory or substation, and providing a performance test environment such as signal detection, multi-source classification and identification, and positioning accuracy verification for the radio frequency partial discharge detection device. This method can effectively test and verify the anti-interference ability and detection positioning accuracy of the radio frequency partial discharge detection device, thereby standardizing and improving the reliability and detection accuracy of the detection device, promoting the further development and application of radio frequency partial discharge detection technology, and providing a strong guarantee for the safe and stable operation of the new power system. The specific implementation is as follows:

[0062] 1. Conduct partial discharge and interference experiments on-site at the substation or in the laboratory. Specifically, discharge data can be collected on-site at the substation, or in the laboratory using equivalent discharge models (such as spike discharge model, particle discharge model, air gap discharge model, suspension discharge model, etc.) to conduct pressurized tests to collect discharge data.

[0063] 2. Use a broadband RF sensor to collect a time-series spectrum of typical partial discharge sources and interference sources. Specifically, the broadband RF sensor can use an omnidirectional biconical antenna and collect the time domain waveform of the discharge signal at high speed, generating time information and power frequency synchronous phase information.

[0064] 3. Reconstruct the collected timing diagram and convert it into an editable digital signal to generate a digital timing diagram of each type of partial discharge source / interference source, and determine the time interval and amplitude ratio of each pulse signal.

[0065] Specifically, the collected timing spectrum is reconstructed and converted into an editable digital signal to generate a digital timing spectrum of various types of partial discharge sources / interference sources, and the occurrence time interval and amplitude ratio of each pulse signal are determined. Specifically, the waveform amplitude, generation time, phase and other information of the discharge signal collected in step 2 are extracted to construct a digital timing spectrum, in which the waveform amplitude is normalized so that it can be emitted proportionally based on the set reference signal strength. The schematic diagram of the timing reconstruction based on the main information of the discharge signal is shown in the figure. Figure 2 The timing diagram of a typical partial discharge source is as follows: Figure 3As shown, the timing diagram of a typical interference source is as follows Figure 4 shown.

[0066] 4. Use an arbitrary waveform generator to generate multiple independently controllable broadband RF pulse signals (convert digital signals into analog signals) based on the digital timing diagram. Each signal channel can be configured with a different discharge timing diagram. The pulse signal waveform is preferably a double exponential decay pulse y(t) = A1e -λ1t +A2e -λ2t +C, where A1 and A2 are amplitude coefficients, representing the initial intensity or contribution ratio of each decay process; λ1 and λ2 are decay rate constants; larger λs indicate faster decay; C is the baseline or steady-state value, representing the residual volume after decay stabilizes; and t is the time variable. The main parameters of the pulse signal waveform (such as pulse peak, rise time, fall time, pulse width, and time constant) are adjustable, allowing simulation of different discharge waveforms.

[0067] Specifically, a double exponential decay pulse is selected as the reference emission signal. The waveforms of the double exponential decay pulse signal under different parameters are shown in the figure below: Figure 5 As shown. Specifically, the timing diagram for selecting the partial discharge source for channel 1 is as follows Figure 3 , reference amplitude 500mV, pulse width 40ns; 2-channel setting selection interference source timing diagram as follows Figure 4 , reference amplitude 700mV, pulse width 80ns.

[0068] 5. Use analog conditioning units to perform broadband power amplification on the analog signals output by each channel of the arbitrary waveform generator. Specifically, a conventional power amplifier can be used. It is recommended to select an operating frequency band of 30 to 1000 MHz, a gain greater than 30 dB, a typical standing wave ratio of 1.7, and a saturation power of 50 dBm to ensure that the output signal strength has a sufficiently large adjustment range. The gain curve of the analog conditioning unit is as follows: Figure 6 shown.

[0069] 6. The amplified signals of each channel are transmitted through the transmitting unit. Each transmitting unit is deployed at different positions to simulate discharge sources at different positions, and finally realizes the simulation of partial discharge signals and interference signals with different spatial positions, different pulse waveforms (pulse width, amplitude, etc.), and different time series spectra.

[0070] Specifically, the transmitting units can be typical omnidirectional biconical antennas, logarithmic antennas, rod antennas, and other types. Each transmitting unit is placed in a different location to simulate different discharge sources. Testing with a spatial broadband RF detection system verified the effectiveness of the broadband RF-based multiple discharge source simulation method. Figure 7 The PRPD diagram of each simulated discharge source is shown in Figure 1, where different colors represent different types of signals. The red signal spectrum is the same as the Figure 4The spectrum of the blue signal corresponds to Figure 3 The corresponding graph. Figure 8 This is a positioning diagram for the detection of each simulated discharge source. The positioning results show that the positions of the three simulated discharge sources are effectively distinguished and are all in different locations, which also verifies the effectiveness of the multi-discharge source simulation method based on broadband RF.

[0071] In summary, the present invention has the following technical effects:

[0072] 1. Multi-source reproducibility: This solution can simultaneously transmit multiple independent broadband RF signals to replicate the complex electromagnetic environment of a substation where multiple power sources and interference coexist. It has good consistency in simulating and reproducing the same test conditions multiple times, which is conducive to standardizing detection requirements.

[0073] 2. Discharge RF signal bandwidth expansion: The output signal bandwidth of this solution is increased to 1GHz (conventional solution <100MHz), which is closer to the actual amplified signal spectrum characteristics.

[0074] 3. High-precision multi-PD source location verification: Conventional technical solutions can only simulate a single PD source signal and cannot verify the accuracy of multiple PD source location verification. This solution can simultaneously transmit multiple independent broadband RF signals, simulating PD sources at different locations by placing transmitter units at different locations.

[0075] 4. Improved efficiency and reduced costs: Conventional pressurized partial discharge test environments are expensive, complex to set up for each experiment, and involve dangerous high voltages. This solution is cheaper, easier to set up, and provides richer and safer simulation results.

[0076] In addition, the second aspect of the embodiment of the present invention provides a multi-discharge source simulation device based on broadband radio frequency, such as Figure 9 As shown, the multi-power source simulation device includes: a control calculation unit, a digital-to-analog conversion unit, an analog conditioning unit and a transmitting unit, wherein

[0077] The control and calculation unit is used to store and collect the time series graphs containing typical partial discharge sources and interference sources in partial discharge and interference tests, reconstruct the time series graphs, convert them into editable digital signals, and generate digital time series graphs of various types of partial discharge sources / interference sources;

[0078] The digital-to-analog conversion unit is used to generate multiple independently controllable broadband radio frequency pulse signals according to the digital timing diagram using an arbitrary waveform generator;

[0079] The analog conditioning unit is used to perform broadband power amplification on each channel of broadband RF pulse signals to generate multiple channels of amplified broadband RF pulse signals;

[0080] The transmitting unit is used to deploy multiple amplified broadband RF pulse signals at different locations to simulate discharge sources at different locations.

[0081] Specifically, refer to Figure 9 As shown, the present invention provides a broadband radio frequency based multi-discharge source simulation device comprising the following parts: ① a control calculation unit, ② a digital-to-analog conversion unit, ③ an analog conditioning unit and ④ a transmitting unit.

[0082] Among them, ① the control calculation unit stores and collects the spectrum library of typical discharges / interferences, and reconstructs the spectrum into editable digital signals, and then configures the timing spectrum and waveform parameters of each channel of the arbitrary waveform generator, etc., supporting graphical interface operation.

[0083] ② The digital-to-analog conversion unit converts multi-channel digital signals into analog signals based on the arbitrary waveform generator. It receives the configuration instructions issued by the control calculation unit and converts the digital signals into analog signals according to the configuration parameters of each channel.

[0084] The basic principle block diagram of the digital-to-analog conversion unit is shown in Figure 10 , which mainly includes:

[0085] 1) A sequencer creates a desired waveform by arranging (sequencing) the waveform into segments, recording only waveform transitions and not idle time, and maintaining synchronization with a trigger signal generator that supports the waveform. The trigger event can be an internal event, an external event, or an event related to another waveform generator.

[0086] 2) Clock generator: The waveform timing can be controlled by an internal or external clock source. A memory controller tracks waveform events in memory and outputs them to the digital-to-analog converter (DAC) in the correct order. The memory controller can loop through repeated elements so that they are only listed once in the waveform memory, thus saving storage space. The clock circuit can control both the DAC and the sequencer.

[0087] 3) Digital-to-analog converter (DAC). The contents of the waveform memory are sent to the DAC. Here, the digital voltage value is converted to an analog voltage. The number of DAC bits affects the vertical resolution. The higher the number of bits, the higher the vertical resolution and the smoother and more realistic the output waveform. The DAC can use interpolation to achieve a higher update rate than the waveform memory. To ensure the simulation effect, it is recommended to use a DAC with a bit number of 12 or more and an amplitude output range of 0.35 to 0.7V. Under the output conditions of the extreme amplitude range, the output amplitude resolution is 2mV to meet the requirements of the discharge amplitude sequence simulation.

[0088] 4) Combined filter: Since the DAC output is a series of voltage steps, it contains a large number of harmonic components and needs to be filtered to obtain a smooth analog waveform.

[0089] 5) Output amplifier: After passing through the filter, the signal enters the amplifier. The amplifier controls gain and bias. Based on the requirements of the discharge amplitude sequence simulation, the output gain and bias can be flexibly adjusted to achieve undistorted output across a high dynamic range and ensure linear signal amplitude restoration.

[0090] 6) Memory, storing emission timing diagram information, control instructions, etc.

[0091] ③ The analog conditioning unit performs broadband power amplification on the analog signals output by each channel. It operates in a frequency band of 30 to 1000 MHz, features a gain greater than 30 dB, a typical standing wave ratio of 1.7, and a saturation power of 50 dBm, ensuring a sufficiently wide adjustment range for the output signal strength.

[0092] ④ Transmitter: This transmits the amplified signals from each channel. Typical omnidirectional biconical antennas, logarithmic antennas, and rod antennas can be used. Each transmitter is placed in a different location to simulate a different discharge source.

[0093] Therefore, the broadband RF-based multi-discharge source simulation device provided by the present invention can simulate a variety of partial discharge broadband RF signals and interference signals, and can simulate and reproduce the same test conditions multiple times, providing a performance function testing environment for the RF partial discharge detection device, such as signal detection, multi-source classification and identification, and positioning accuracy verification.

[0094] The above description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for simulating a multi-amplifier source based on broadband radio frequency, characterized in that: include: Collect time series diagrams of typical partial discharge sources and interference sources during partial discharge and interference tests; Reconstruct the time sequence diagram and convert it into an editable digital signal to generate a digital time sequence diagram of various types of partial discharge sources / interference sources; An arbitrary waveform generator is used to generate multiple independently controllable broadband radio frequency pulse signals according to the digitized timing spectrum; Performing broadband power amplification on each of the broadband radio frequency pulse signals to generate multiple amplified broadband radio frequency pulse signals; Multiple amplified broadband RF pulse signals are deployed at different locations to simulate discharge sources at different locations.

2. The method according to claim 1, characterized in that The partial discharge and interference tests are carried out on-site at the substation or in the laboratory, and When the test is conducted at a transformer substation, a broadband radio frequency sensor is used to collect the time series spectrum; When the test is conducted in a laboratory, an equivalent discharge model is used to perform a pressure test, and the broadband radio frequency sensor is used to collect the timing spectrum.

3. The method according to claim 2, characterized in that The equivalent discharge model is any one of a spike discharge model, a particle discharge model, an air gap discharge model, a surface discharge model, a corona discharge model, and a suspension discharge model.

4. The method according to claim 1, wherein The timing diagram is reconstructed and converted into an editable digital signal to generate digital timing diagrams of various types of partial discharge sources / interference sources, including: Extracting the waveform amplitude, generation time and phase information of each type of partial discharge source / interference source in the timing diagram; According to the waveform amplitude, generation time and phase information of each type of partial discharge source / interference source, the digital timing diagram of each type of partial discharge source / interference source is constructed.

5. The method according to claim 1, wherein The broadband radio frequency pulse signal selects a double exponential decay pulse, which is specifically expressed as: y(t)=A1e -λ1t +A2e -λ2t +C Where A1, A2 are amplitude coefficients; λ1, λ2 are decay rate constants; C is the baseline or steady-state value; and t is the time variable.

6. A broadband radio frequency-based multi-discharge source simulation device for implementing the broadband radio frequency-based multi-discharge source simulation method according to any one of claims 1 to 5, characterized in that: include: Control calculation unit, digital-to-analog conversion unit, analog conditioning unit and transmitting unit, wherein The control calculation unit is used to store and collect time series graphs containing typical partial discharge sources and interference sources in partial discharge and interference tests, and reconstruct the time series graphs into editable digital signals to generate digital time series graphs of various types of partial discharge sources / interference sources; The digital-to-analog conversion unit is used to generate multiple independently controllable broadband radio frequency pulse signals according to the digitized timing diagram using an arbitrary waveform generator; The analog conditioning unit is used to perform broadband power amplification on each channel of the broadband radio frequency pulse signal to generate multiple channels of amplified broadband radio frequency pulse signals; The transmitting unit is used to deploy multiple amplified broadband radio frequency pulse signals at different locations to simulate discharge sources at different locations.

7. The device according to claim 6, characterized in that The digital-to-analog conversion unit includes: a sequence generator, a clock generator, a digital-to-analog converter, a combined filter and an output amplifier, wherein The sequencer is used to arrange the waveform into multiple segments to create the required waveform and send it to the digital-to-analog converter; The clock generator is used to control the timing of the waveform through an internal clock or an external clock, and output the waveform events to the digital-to-analog converter and the memory in a specified order; The digital-to-analog converter is used to convert the digital voltage value of the timing waveform into an analog voltage, output a voltage step and send it to the combined filter; The combined filter is used to filter out the harmonics in the voltage ladder, obtain a smooth analog waveform and send it to the output amplifier; The output amplifier is used to amplify the analog waveform and output a broadband radio frequency pulse signal.

8. The device according to claim 6, characterized in that The transmitter of the transmitting unit is any one of an omnidirectional biconical antenna, a logarithmic antenna and a rod antenna.

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