Insulation state detection method and system for insulation equipment

Abstract

The present invention discloses a method and system for detecting the insulation state of insulating equipment. The insulating equipment is gas-insulated equipment; the insulation state detection method is performed by an insulation state detection system, which includes a gas meter, a power supply device, a sensor, and a data processing device; the insulation state detection method includes: the gas meter detects gas parameter information of the insulating gas in the insulating equipment; when the parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating equipment; the sensor detects electrical parameter information of the insulating equipment, and converts the electrical parameter information into an electrical signal and sends it to the data processing device; the data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulating equipment. The technical solution of the present invention improves the accuracy of insulation state detection.

Description

Technical Field

[0001] The present invention relates to the technical field of insulation state detection, and in particular to an insulation state detection method and system for insulation equipment. Background Art

[0002] C4F7N / C02 mixed environmentally friendly gas is an innovative, environmentally friendly gas mixture primarily composed of perfluoroisobutyronitrile (C4F7N) and carbon dioxide (CO2) in precise scientific proportions. This composite material is particularly valued in the field of electrical engineering because it exhibits excellent insulation and dielectric properties, while providing a safer and more reliable working environment in electrical insulation switchgear and substations.

[0003] As an environmentally friendly alternative, the C4F7N / C02 gas mixture exhibits a smaller global greenhouse gas effect, especially compared to traditional insulating gases such as sulfur hexafluoride (SF6), and its potential impact on global warming is greatly reduced. This gas mixture also has the advantage of being easy to handle because it is gaseous at room temperature and does not require high-pressure storage, making it more economical and efficient in transportation and installation.

[0004] Key applications for this gas mixture include ultra-high voltage and high voltage gas-insulated switchgear or gas-insulated substations. In these critical infrastructures, the C4F7N / C02 gas mixture provides highly efficient insulation and reduces harmful gas emissions, thus aligning with the pursuit of more sustainable energy solutions. Its environmentally friendly properties also make it a viable option that both the electrical industry and policymakers are actively considering. With the increasing demand for environmental impact assessments and the reduction of greenhouse gas emissions, the C4F7N / C02 environmentally friendly gas mixture represents a step towards a greener and safer future.

[0005] The existing C4F7N / C02 mixed environmentally friendly gas lacks an appropriate insulation state type identification method during the identification process. The conventional insulation state detection accuracy and reliability are poor, and the identification effectiveness in complex environments is poor. Summary of the Invention

[0006] The present invention provides an insulation state detection method and system for insulation equipment to solve the problem of insulation state detection accuracy.

[0007] According to one aspect of the present invention, a method for detecting the insulation state of an insulating device is provided, wherein the insulating device is a gas-insulated device. The method is performed by an insulation state detection system, the insulation state detection system comprising a gas measuring instrument, a power supply device, a sensor, and a data processing device, the power supply device being connected to a power supply terminal of the insulating device, and the sensor being connected to the data processing device.

[0008] The insulation state detection method comprises:

[0009] The gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes the concentration value, pressure value and temperature value of the insulating gas;

[0010] When a parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device;

[0011] The sensor detects electrical parameter information of the insulation device and converts the electrical parameter information into an electrical signal and sends it to the data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information;

[0012] The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

[0013] Optionally, the parameter value corresponding to the gas parameter information is within a preset range, including:

[0014] The concentration value of the insulating gas is within a preset concentration range, the pressure value of the insulating gas is within a preset pressure range, and the temperature value of the insulating gas is within a preset temperature range.

[0015] Optionally, the test voltage is less than or equal to a preset multiple of the rated working voltage of the insulation equipment; wherein the preset multiple is less than or equal to 1.5;

[0016] The sensor is installed on the surface of the insulating device; the sensor is an electromagnetic wave sensor, an ultrasonic sensor or an electric field sensor;

[0017] The power supply device includes a voltage generator or a transformer.

[0018] Optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0019] The data processing device filters the electrical signal;

[0020] The data processing device uses the average value or standard deviation of the filtered electrical signal as the target feature information, or the data processing device uses the change direction of the filtered electrical signal as the target feature information, or the data processing device uses the frequency value of the filtered electrical signal as the target feature information.

[0021] Optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0022] The data processing device determines the time interval between two adjacent amplitude changes of the electrical signal, and uses the time interval as the target feature information.

[0023] Optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0024] The data processing device uses fast Fourier transform or short-time Fourier transform to determine the frequency value of the electrical signal at each moment, and uses the frequency value of the filtered electrical signal as the target feature information;

[0025] Alternatively, the data processing device adopts wavelet transform to take the peak value, trough value and signal jump time of the electrical signal as the target feature information of the electrical signal.

[0026] Optionally, the insulation state detection system further includes a voltage detection device;

[0027] After the power supply device applies the test voltage to the insulation device, the method further includes:

[0028] The voltage detection device detects the actual voltage of the insulation device.

[0029] Optionally, the insulation status detection system further includes a data collector; the data collector is connected between the sensor and the data processing device;

[0030] Before the data processing device processes the electrical signal, the method further includes:

[0031] The data processing device configures the data collector and the data processing device according to the received configuration parameter information; wherein the configuration parameter information includes a sampling frequency, a signal processing mode and a time window;

[0032] The data collector transmits the electrical signal collected by the sensor to the data processing device according to the sampling frequency;

[0033] The data processing device displays the electrical signal.

[0034] Optionally, after determining the insulation state of the insulation device, the method further includes:

[0035] When the data processing device determines that the electrical parameter value corresponding to the electrical signal is within a preset electrical parameter range corresponding to the determined insulation state, it determines that the insulation state detection is accurate; wherein the electrical parameter value includes a discharge intensity value and / or a frequency value.

[0036] According to another aspect of the present invention, there is provided an insulation state detection system for insulating equipment, the insulation state detection system being configured to execute the insulation state detection method described in any one of the embodiments of the present invention; the insulation state detection system comprising a gas meter, a power supply device, a sensor, and a data processing device, the power supply device being connected to a power supply terminal of the insulating equipment, and the sensor being connected to the data processing device.

[0037] The technical solution of an embodiment of the present invention uses a gas meter to detect gas parameter information of the insulating gas in the insulating device. Only when the parameter value corresponding to the gas parameter information is within a preset range does the power supply device apply a test voltage to the insulating device, thereby ensuring the accuracy of insulation status detection. After the power supply device applies the test voltage to the insulating device, the sensor detects the electrical parameter information of the insulating device and converts the electrical parameter information into an electrical signal, which is sent to a data processing device. The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with the characteristic information of a preset waveform, and determines the insulation status of the insulating device. By processing the electrical signal by the data processing device to obtain the target characteristic information of the electrical signal, the insulation status of the insulating device can be accurately determined based on the target characteristic information, thereby improving the reliability of insulation status detection.

[0038] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 This is a flow chart of a method for detecting the insulation status of an insulation device provided by an embodiment of the present invention;

[0041] Figure 2 This is a flow chart of another method for detecting the insulation status of an insulation device provided by an embodiment of the present invention;

[0042] Figure 3This is a flow chart of another method for detecting the insulation status of an insulation device provided by an embodiment of the present invention;

[0043] Figure 4 This is a flow chart of another method for detecting the insulation status of an insulation device provided by an embodiment of the present invention;

[0044] Figure 5 The present invention is a schematic structural diagram of an insulation status detection system for insulation equipment provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] An embodiment of the present invention provides a method for detecting the insulation status of an insulating device, wherein the insulating device is a gas-insulated device. The method is performed by an insulation status detection system, which includes a gas meter, a power supply, a sensor, and a data processing device. The power supply is connected to a power supply terminal of the insulating device, and the sensor is connected to the data processing device. The insulating device may be a gas-insulated switchgear or a gas-insulated substation. The insulating gas may be a mixture of perfluoroisobutyronitrile (C4F7N) and carbon dioxide (CO2).

[0048] Figure 1 This is a flow chart of a method for detecting the insulation status of an insulation device provided by an embodiment of the present invention, with reference to Figure 1 , insulation status detection methods include:

[0049] S110. A gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes a concentration value, a pressure value, and a temperature value of the insulating gas.

[0050] Specifically, by using a gas meter to detect gas parameter information of the insulating gas in the insulation equipment, such as the concentration, pressure, and temperature of the insulating gas, it is possible to determine whether the gas parameter information of the insulating gas meets the operating requirements of the insulation equipment. If the gas parameter information does not meet the operating requirements of the insulation equipment, timely maintenance can be performed. If the gas parameter information does meet the operating requirements of the insulation equipment, the insulation status of the insulation equipment can be tested to ensure the accuracy of the insulation status detection. Furthermore, by detecting the gas parameter information of the insulating gas, it is possible to determine whether there is an insulating gas leak. After ensuring that there is no insulating gas leak, the insulation status of the insulation equipment can be tested to ensure the accuracy of the insulation status detection.

[0051] Optionally, before the gas meter detects gas parameter information of the insulating gas in the insulating device, it is possible to first confirm whether the components in the insulation status detection system are functioning properly. Specifically, it is possible to check whether the power supply unit, gas meter, sensor, and data processing unit are functioning properly to ensure the normal operation of the detection. For example, the power cord of the insulating device being tested, the power cord of the sensor, and the wiring of the sensor can be checked to ensure that they are intact.

[0052] S120. When the parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device.

[0053] Specifically, when the parameter values ​​corresponding to the gas parameter information are within a preset range, i.e., the insulating gas concentration, pressure, and temperature are within a preset range, and the gas parameter information meets the operating requirements of the insulating device, i.e., when there is no insulating gas leakage, the power supply device applies a test voltage to the insulating device to ensure the accuracy of insulation status detection. For example, the power supply device applies a test voltage to the power supply terminal of the insulating device and then detects the discharge status of the insulating device to determine the insulation status of the insulating device.

[0054] Optionally, before the power supply applies the test voltage to the insulation equipment, a sensor can be selected and installed. When selecting a sensor, consider the type of discharge that may occur in the insulation equipment. For high-frequency partial discharge, choose an electromagnetic wave sensor; for low-frequency partial discharge, choose an ultrasonic sensor or a low-frequency electric field sensor. Adjust the sensor's sensitivity based on the specific requirements of the insulation equipment and its operating environment, choosing a sensor with an appropriate measurement range. For example, if the insulation equipment may discharge a high voltage, choose a sensor with a wide measurement range; if the insulation equipment may discharge a low voltage, choose a sensor with a narrow measurement range. Choose a sensor that is of moderate size and easy to install and operate. Then, inspect the sensor's cable connectors, electrical interfaces, or connection points. Mount the sensor on the surface of the insulation equipment, adjusting the sensor's angle to align with the test area. Select an area away from strong electromagnetic interference, vibration sources, or other sources that could affect sensor performance. Secure the sensor to the intended location on the insulation equipment using a bracket, clamp, or bolts. After sensor installation, perform necessary calibration and conduct simulation or system testing.

[0055] S130. The sensor detects electrical parameter information of the insulating device, and converts the electrical parameter information into an electrical signal and sends it to a data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information.

[0056] Specifically, after the power supply applies a test voltage to the insulation device, the sensor detects electrical parameter information of the insulation device, such as detecting electric field information of the insulation device and converting the electrical parameter information into an electrical signal for output, or detecting ultrasonic information of the insulation device and converting the ultrasonic information into an electrical signal for output, or detecting electromagnetic wave information of the insulation device and converting the electromagnetic wave information into an electrical signal for output. In this way, the discharge intensity of the insulation device can be determined based on the electrical parameter information, thereby determining the insulation state of the insulation device under test.

[0057] S140. The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

[0058] Specifically, the data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, such as the mean or standard deviation of the electrical signal, or the direction of change of the electrical signal (i.e., the change trend), or the frequency value of the electrical signal, or the time interval between two signal mutations (i.e., two amplitude changes) in the electrical signal, or the peak value, trough value and signal jump time (i.e., rise time and fall time) of the electrical signal, so as to facilitate comparison of the target characteristic information with the characteristic information in the preset waveform to determine the insulation state of the insulating equipment.

[0059] The preset waveform may be an electrical signal waveform of a known insulation state type. For example, the insulation states include a first insulation state, a second insulation state, a third insulation state, and a fourth insulation state. The first insulation state corresponds to the first preset waveform, the second insulation state corresponds to the second preset waveform, the third insulation state corresponds to the third preset waveform, and the fourth insulation state corresponds to the fourth preset waveform. When the target characteristic information is close to or identical to the characteristic information in the first preset waveform, the insulation state of the insulation device is determined to be the first insulation state; when the target characteristic information is close to or identical to the characteristic information in the second preset waveform, the insulation state of the insulation device is determined to be the second insulation state; when the target characteristic information is close to or identical to the characteristic information in the third preset waveform, the insulation state of the insulation device is determined to be the third insulation state; and when the target characteristic information is close to or identical to the characteristic information in the fourth preset waveform, the insulation state of the insulation device is determined to be the fourth insulation state. The first insulation state may be basically normal, the second insulation state may be in need of attention, the third insulation state may indicate a problem, and the fourth insulation state may indicate a serious problem.

[0060] In this way, by determining the insulation state of the insulation equipment, corresponding measures can be taken in a timely manner when the insulation state of the insulation equipment is abnormal, so as to cause greater damage to the insulation equipment.

[0061] The technical solution of this embodiment uses a gas meter to detect gas parameter information of the insulating gas in the insulating device. The power supply device applies a test voltage to the insulating device only when the parameter value corresponding to the gas parameter information is within a preset range, thereby ensuring the accuracy of insulation status detection. After the power supply device applies the test voltage to the insulating device, a sensor detects the electrical parameter information of the insulating device and converts the electrical parameter information into an electrical signal, which is transmitted to a data processing device. The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal. This target characteristic information is then compared with characteristic information of a preset waveform to determine the insulation status of the insulating device. By processing the electrical signal with the data processing device to obtain target characteristic information of the electrical signal, the insulation status of the insulating device can be accurately determined based on the target characteristic information, thereby improving the reliability of insulation status detection.

[0062] Based on the above technical solution, optionally, the parameter value corresponding to the gas parameter information is within a preset range, including:

[0063] The concentration value of the insulating gas is within a preset concentration range, the pressure value of the insulating gas is within a preset pressure range, and the temperature value of the insulating gas is within a preset temperature range.

[0064] Specifically, by determining that the concentration value of the insulating gas is within a preset concentration range, the pressure value of the insulating gas is within a preset pressure range, and the temperature value of the insulating gas is within a preset temperature range, it can be ensured that the gas parameter information meets the requirements for the operation of the insulating equipment, that is, when there is no leakage of the insulating gas, the power supply device applies a test voltage to the insulating equipment again, which can ensure the accuracy of the insulation status detection.

[0065] On the basis of the above technical solution, optionally, the test voltage is less than or equal to a preset multiple of the rated working voltage of the insulation equipment; wherein the preset multiple is less than or equal to 1.5;

[0066] The sensor is installed on the surface of the insulating equipment; the sensor is an electromagnetic wave sensor, an ultrasonic sensor or an electric field sensor;

[0067] The power supply unit comprises a voltage generator or transformer.

[0068] Specifically, the test voltage is less than or equal to a preset multiple of the rated operating voltage of the insulating device. For example, the test voltage is equal to the rated operating voltage of the insulating device. This ensures that the test voltage is not excessive and does not damage the insulating device. The sensor is mounted on the surface of the insulating device to facilitate accurate detection of the insulating device's electrical parameter information. The power supply device includes a voltage generator or transformer, which enables the power supply device to output the test voltage to power the insulating device, thereby detecting the discharge condition of the insulating device, that is, the insulation status of the insulating device.

[0069] On the basis of the above technical solutions, several methods for processing electrical signals by a data processing device are described below, but they are not intended to limit the present application.

[0070] In one embodiment, optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0071] Step a1: The data processing device filters the electrical signal.

[0072] The data processing device may include a filter, and the filter in the data processing device may filter the electrical signal.

[0073] Specifically, the data processing device filters the electrical signal to remove high-frequency noise, background noise and interference signals, thereby improving the signal-to-noise ratio of the data, facilitating the processing of the denoised signal, and obtaining more accurate target feature information, thereby making the detection of the insulation status more reliable.

[0074] Optionally, when filtering, the cutoff frequency and bandwidth parameters may be set according to the characteristics of the electrical signal, which is not limited in this embodiment. Before filtering, the integrity of the data may be checked, and the electrical signal may be filtered when no data is missing.

[0075] Optionally, after filtering, the data processing device may display the filtered electrical signal so that the filtering effect can be visually seen.

[0076] Step a2: The data processing device uses the average value or standard deviation of the filtered electrical signal as the target feature information, or the data processing device uses the change direction of the filtered electrical signal as the target feature information, or the data processing device uses the frequency value of the filtered electrical signal as the target feature information.

[0077] Specifically, the data processing device may calculate the average value or standard deviation of the amplitude of the filtered electrical signal and use the average value or standard deviation as target characteristic information. For example, using the average value as target characteristic information, the average value determined by the data processing device may be compared with the average value of a preset waveform to determine a waveform that is close to the preset waveform, thereby determining the insulation state of the insulation device. For example, using the standard deviation as target characteristic information, the standard deviation determined by the data processing device may be compared with the standard deviation of the preset waveform to determine a waveform that is close to the preset waveform, thereby determining the insulation state of the insulation device.

[0078] Alternatively, the data processing device can determine the direction of change (i.e., the trend of change) of the filtered electrical signal by drawing a trend line or using smoothing technology, use the direction of change of the filtered electrical signal as the target feature information, compare the direction of change determined by the data processing device with the change method of the preset waveform, determine a close preset waveform, and thus determine the insulation state of the insulating equipment.

[0079] Alternatively, the data processing device may perform spectrum analysis to determine the frequency value of the filtered electrical signal, which may be an average frequency value over a period of time or a frequency value corresponding to each moment, although this embodiment is not limited thereto. The frequency value of the filtered electrical signal determined by the data processing device is compared with the frequency value of a preset waveform to determine which waveform is closest to the preset waveform, thereby determining the insulation state of the insulation device.

[0080] In another embodiment, optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0081] The data processing device determines the time interval between two adjacent amplitude changes of the electrical signal and uses the time interval as target feature information.

[0082] Specifically, the data processing device determines the time interval between two adjacent amplitude changes of the electrical signal, that is, the time interval between two adjacent amplitude mutations, and compares the time interval between two adjacent amplitude changes of the electrical signal determined by the data processing device with the time interval between two adjacent amplitude changes of a preset waveform to determine a close preset waveform, thereby determining the insulation state of the insulating device.

[0083] In another embodiment, optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0084] The data processing device uses fast Fourier transform or short-time Fourier transform to determine the frequency value of the electrical signal at each moment, and uses the frequency value of the filtered electrical signal as target feature information.

[0085] Specifically, the data processing device uses fast Fourier transform or short-time Fourier transform to convert the electrical signal from the time domain to the frequency domain, determine the spectrum information of the electrical signal, determine the frequency value of the electrical signal at each moment, use the frequency value of the filtered electrical signal as the target feature information, compare the frequency value of the filtered electrical signal with the frequency value at the corresponding moment in the preset waveform, determine the close preset waveform, and thus determine the insulation state of the insulating equipment.

[0086] In another embodiment, optionally, the data processing device processes the electrical signal to obtain target feature information of the electrical signal, including:

[0087] The data processing device adopts wavelet transform and takes the peak value, trough value and signal jump time of the electric signal as the target characteristic information of the electric signal.

[0088] Specifically, the data processing device uses wavelet transform to convert the electrical signal, and obtains the peak value, trough value and signal jump time (rise time and fall time) of the electrical signal as the target characteristic information of the electrical signal. The peak value, trough value and signal jump time of the electrical signal are compared with the peak value, trough value and signal jump time in the preset waveform to determine the close preset waveform, thereby determining the insulation state of the insulating equipment.

[0089] On the basis of the above technical solutions, optionally, the insulation state detection system further includes a voltage detection device.

[0090] Figure 2 This is a flowchart of another insulation state detection method for an insulation device provided by an embodiment of the present invention. Optionally, refer to Figure 2 , insulation status detection methods include:

[0091] S210. A gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes a concentration value, a pressure value, and a temperature value of the insulating gas.

[0092] S220: When the parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device.

[0093] S230. The voltage detection device detects the actual voltage of the insulation equipment.

[0094] Specifically, the voltage detection device can be a voltmeter, a voltage transformer, or other voltage detection device, and this embodiment is not limited thereto. In this way, the voltage at the power supply end of the insulating device can be monitored in real time during the application of the test voltage, and the test voltage output by the power supply device can be adjusted based on the actual voltage so that the output test voltage meets the test requirements.

[0095] Optionally, the insulation condition detection system for an insulating device may further include a current detection device, which may be a current sensor. The current detection device can detect the actual current of the insulating device after the power supply device applies a test voltage to the insulating device under test. In this way, the actual current at the power supply terminal of the insulating device can be monitored in real time during the application of the test voltage, and the test voltage output by the power supply device can be adjusted based on the actual current to ensure that the output test voltage meets the test requirements.

[0096] S240. The sensor detects electrical parameter information of the insulating device, and converts the electrical parameter information into an electrical signal and sends it to the data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information.

[0097] S250: The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

[0098] On the basis of the above technical solutions, optionally, the insulation status detection system further includes a data collector; the data collector is connected between the sensor and the data processing device.

[0099] Figure 3 This is a flowchart of another insulation state detection method for an insulation device provided by an embodiment of the present invention. Optionally, refer to Figure 3 , insulation status detection methods include:

[0100] S310. A gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes a concentration value, a pressure value, and a temperature value of the insulating gas.

[0101] S320: When the parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device.

[0102] S330. The voltage detection device detects the actual voltage of the insulation equipment.

[0103] S340. The sensor detects electrical parameter information of the insulating device, and converts the electrical parameter information into an electrical signal and sends it to the data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information.

[0104] S350. The data processing device configures the data collector and the data processing device according to the received configuration parameter information; wherein the configuration parameter information includes a sampling frequency, a signal processing mode, and a time window.

[0105] Specifically, the data processing device may be a host computer. The data processing device configures the data collector and the data processing device based on the received configuration parameter information, such as configuring the sampling frequency of the data collector, the signal processing mode of the data processing device, and the time window. For example, if the sampling frequency of the data collector is 100 MHz, which allows for the collection of a large amount of data, and the time window is 5 microseconds, then the data received by the data processing device is a 5-microsecond segment, meaning that the data of the electrical signal can be stored every 5 microseconds.

[0106] S360: The data collector transmits the electrical signal collected by the sensor to the data processing device according to the sampling frequency.

[0107] Specifically, the data collector transmits the electrical signal collected by the sensor to the data processing device. For example, the data collector can convert the electrical signal collected by the sensor into a digital signal. After the data processing device obtains the digital signal, it can convert it into a corresponding electrical signal, thereby processing the electrical signal collected by the sensor.

[0108] S370: The data processing device displays the electrical signal.

[0109] Specifically, the data processing device can display the electrical signal, thereby intuitively displaying the electrical signal in real time, making it easier to observe the electrical signal. When the electrical signal fluctuates abnormally, the machine can be shut down for maintenance in a timely manner.

[0110] Optionally, the data processing device can also transmit the electrical signal to a backup device to achieve timely data backup. The backup device can be a server or a mobile storage device.

[0111] S380. The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

[0112] On the basis of the above technical solutions, Figure 4 This is a flowchart of another insulation state detection method for an insulation device provided by an embodiment of the present invention. Optionally, refer to Figure 4 , insulation status detection methods include:

[0113] S410. A gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes a concentration value, a pressure value, and a temperature value of the insulating gas.

[0114] S420: When the parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device.

[0115] S430. The voltage detection device detects the actual voltage of the insulation equipment.

[0116] S440. The sensor detects electrical parameter information of the insulating device, and converts the electrical parameter information into an electrical signal and sends it to the data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information.

[0117] S450: The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

[0118] S460. When the data processing device determines that the electrical parameter value corresponding to the electrical signal is within a preset electrical parameter range corresponding to the determined insulation state, the insulation state detection is determined to be accurate; wherein the electrical parameter value includes a discharge intensity value and / or a frequency value.

[0119] Specifically, the preset electrical parameter range is an electrical parameter range specified in a relevant standard. The preset electrical parameter range includes a discharge intensity range and / or a frequency range. For example, the preset electrical parameter range includes a discharge intensity range and a frequency range, with different insulation states corresponding to different discharge intensity ranges and frequency ranges. The discharge intensity may be, for example, electric field strength or electromagnetic wave strength. The discharge intensity is the amplitude of the electrical signal corresponding to the electrical parameter information. The relevant standard may be IEC60270, the partial discharge measurement standard.

[0120] For example, the insulation state includes a first insulation state, a second insulation state, a third insulation state, and a fourth insulation state. The discharge intensity range includes a first discharge intensity range, a second discharge intensity range, a third discharge intensity range, and a fourth discharge intensity range; the frequency range includes a first frequency range, a second frequency range, a third frequency range, and a fourth frequency range. For example, according to the insulation state detection method of the insulation device provided by the embodiment of the present invention, if it is determined that the insulation state of the insulation device is the first insulation device, then it is determined whether the amplitude of the electrical signal determined by the data processing device is in the first discharge intensity range, and whether the frequency value of the electrical signal determined by the data processing device is in the first frequency range. If so, it is determined that the insulation state detection is accurate. The judgment method for other insulation states is the same and will not be repeated here.

[0121] By comparing the determined insulation state with the standard, the accuracy of the insulation state detection can be further confirmed. Furthermore, by comparing the discharge intensity threshold (e.g., the boundary value of the discharge intensity range) in the standard with the amplitude of the detected electrical signal, the severity of the discharge in the tested insulation device can be determined.

[0122] Optionally, during the insulation status detection process, all important data from the test process can be recorded in a timely manner, including the test time, test conditions, collected signal characteristics (target characteristic information), and the results of the determined insulation status, and a test report can be written. Specifically, the date and time of the test can be recorded, the specific location where the test was conducted can be recorded, the operating status of the insulation equipment during the test, including the load condition, voltage, and environmental conditions of the insulation equipment, the configuration and parameter settings of the sensor, data processing device, and data acquisition device can be recorded, including the sensor model, the filter settings of the data processing device, and the sampling rate of the data acquisition device, etc., and relevant information about the test environment can be recorded, including the surrounding electromagnetic interference sources and the equipment installation location, and the recorded information can be organized into a report.

[0123] An embodiment of the present invention further provides an insulation state detection system for insulation equipment, and the insulation state detection system is used to execute the insulation state detection method provided by any embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of an insulation state detection system for an insulation device provided by an embodiment of the present invention, with reference to Figure 5 The insulation status detection system includes a gas meter 101, a power supply device 102, a sensor 103 and a data processing device 104. The power supply device 102 is connected to the power supply end of the insulation device 201, and the sensor 103 is connected to the data processing device 104.

[0124] Specifically, the gas meter 101 can measure the gas parameters of the insulating gas in the insulation device. The power supply 102 includes a voltage generator or transformer, which outputs a test voltage to the power supply terminal of the insulation device 201 under test. The sensor 103 detects the electrical parameters of the insulation device, converts them into electrical signals, and transmits them to the data processing device 104. The data processing device 104 can be a host computer, etc. The data processing device 104 processes the electrical signals to obtain target characteristic information of the electrical signals, facilitating comparison of the target characteristic information with characteristic information in a preset waveform to determine the insulation status of the insulation device.

[0125] It should be noted that Figure 5 While the illustration of sensor 103 being connected to insulating device 201 does not indicate a connection between sensor 103 and insulating device 201, it simply indicates that sensor 103 detects electrical parameter information of insulating device 201. Similarly, the illustration of gas meter 101 being connected to insulating device 201 does not indicate a connection between gas meter 101 and insulating device 201; it simply indicates that gas meter 101 detects gas parameter information of the insulating gas in insulating device 201.

[0126] The technical solution of this embodiment uses a gas meter to detect gas parameter information of the insulating gas in the insulating device. The power supply device applies a test voltage to the insulating device only when the parameter value corresponding to the gas parameter information is within a preset range, thereby ensuring the accuracy of insulation status detection. After the power supply device applies the test voltage to the insulating device, a sensor detects the electrical parameter information of the insulating device and converts the electrical parameter information into an electrical signal, which is transmitted to a data processing device. The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal. This target characteristic information is then compared with characteristic information of a preset waveform to determine the insulation status of the insulating device. By processing the electrical signal with the data processing device to obtain target characteristic information of the electrical signal, the insulation status of the insulating device can be accurately determined based on the target characteristic information, thereby improving the reliability of insulation status detection.

[0127] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0128] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for detecting the insulation status of an insulating device, characterized in that: The insulation device is a gas-insulated device; the insulation state detection method is performed by an insulation state detection system, which includes a gas measuring instrument, a power supply device, a sensor, and a data processing device, wherein the power supply device is connected to the power supply terminal of the insulation device, and the sensor is connected to the data processing device; The insulation state detection method comprises: The gas measuring instrument detects gas parameter information of the insulating gas in the insulating device; wherein the gas parameter information includes the concentration value, pressure value and temperature value of the insulating gas; When a parameter value corresponding to the gas parameter information is within a preset range, the power supply device applies a test voltage to the insulating device; The sensor detects electrical parameter information of the insulation device and converts the electrical parameter information into an electrical signal and sends it to the data processing device; wherein the electrical parameter information includes electromagnetic wave information, ultrasonic wave information or electric field information; The data processing device processes the electrical signal to obtain target characteristic information of the electrical signal, compares the target characteristic information with characteristic information of a preset waveform, and determines the insulation state of the insulation device.

2. The method according to claim 1, characterized in that The parameter value corresponding to the gas parameter information is within a preset range, including: The concentration value of the insulating gas is within a preset concentration range, the pressure value of the insulating gas is within a preset pressure range, and the temperature value of the insulating gas is within a preset temperature range.

3. The method according to claim 1, characterized in that The test voltage is less than or equal to a preset multiple of the rated working voltage of the insulation equipment; wherein the preset multiple is less than or equal to 1.5; The sensor is installed on the surface of the insulating device; the sensor is an electromagnetic wave sensor, an ultrasonic sensor or an electric field sensor; The power supply device includes a voltage generator or a transformer.

4. The method according to claim 1, wherein The data processing device processes the electrical signal to obtain target feature information of the electrical signal, including: The data processing device filters the electrical signal; The data processing device uses the average value or standard deviation of the filtered electrical signal as the target feature information, or the data processing device uses the change direction of the filtered electrical signal as the target feature information, or the data processing device uses the frequency value of the filtered electrical signal as the target feature information.

5. The method according to claim 1, wherein The data processing device processes the electrical signal to obtain target feature information of the electrical signal, including: The data processing device determines the time interval between two adjacent amplitude changes of the electrical signal, and uses the time interval as the target feature information.

6. The method according to claim 1, characterized in that The data processing device processes the electrical signal to obtain target feature information of the electrical signal, including: The data processing device uses fast Fourier transform or short-time Fourier transform to determine the frequency value of the electrical signal at each moment, and uses the frequency value of the filtered electrical signal as the target feature information; Alternatively, the data processing device adopts wavelet transform to take the peak value, trough value and signal jump time of the electrical signal as the target feature information of the electrical signal.

7. The method according to claim 1, characterized in that The insulation state detection system also includes a voltage detection device; After the power supply device applies the test voltage to the insulation device, the method further includes: The voltage detection device detects the actual voltage of the insulation device.

8. The method according to claim 1, characterized in that The insulation state detection system further includes a data collector; the data collector is connected between the sensor and the data processing device; Before the data processing device processes the electrical signal, the method further includes: The data processing device configures the data collector and the data processing device according to the received configuration parameter information; wherein the configuration parameter information includes a sampling frequency, a signal processing mode and a time window; The data collector transmits the electrical signal collected by the sensor to the data processing device according to the sampling frequency; The data processing device displays the electrical signal.

9. The method according to any one of claims 1 to 8, characterized in that After determining the insulation state of the insulation device, the method further includes: When the data processing device determines that the electrical parameter value corresponding to the electrical signal is within a preset electrical parameter range corresponding to the determined insulation state, it determines that the insulation state detection is accurate; wherein the electrical parameter value includes a discharge intensity value and / or a frequency value.

10. An insulation status detection system for insulation equipment, characterized in that: The insulation state detection system is used to execute the insulation state detection method described in any one of claims 1 to 9; the insulation state detection system includes a gas measuring instrument, a power supply device, a sensor and a data processing device, the power supply device is connected to the power supply end of the insulation equipment, and the sensor is connected to the data processing device.

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