Intelligent partial discharge tester system, monitoring method thereof, electronic equipment and storage medium

Abstract

The invention discloses an intelligent partial discharge tester system and a monitoring method thereof, electronic equipment and a storage medium, and relates to the technical field of partial discharge testers or other related fields, and the system comprises a partial discharge tester which is used for being connected with a high-voltage live display of a power distribution switch cabinet, sampling a pulse current signal, and transmitting the sampled pulse current signal to the power distribution switch cabinet; the power distribution switch cabinet is not powered off in the connection process of the partial discharge tester and the power distribution switch cabinet; the built-in filter chip is used for filtering the pulse current signal; the built-in amplification chip is used for amplifying the filtered pulse current signal; system software is built in and is used for analyzing the amplified pulse current signal to obtain the partial discharge quantity and the discharge frequency and calculating the partial discharge intensity; and the display is used for displaying the partial discharge quantity, the discharge frequency and the partial discharge intensity, and giving an alarm when the partial discharge intensity is greater than an alarm threshold value. According to the invention, the technical problem of inconvenient installation of the partial discharge tester in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of partial discharge testers or other related fields, and in particular to an intelligent partial discharge tester system and a monitoring method thereof, an electronic device and a storage medium. Background Art

[0002] In the power system, the distribution switchgear is an important power equipment, which can distribute power resources and protect and control power. However, due to long-term operation and the influence of the external environment, the distribution switchgear is prone to various faults during use, including partial discharge. These faults will cause the power system to fail to work properly and affect the safe and stable operation of the power system.

[0003] In the related art, since the insulation equipment of the distribution switch cabinet will produce bubbles or impurities during the manufacturing process, there are high-voltage conductor spikes, metal particle groups and equipment manufacturing and installation defects inside the distribution switch cabinet, these characteristics and defects will cause uneven electric fields and dielectrics. Under the action of the alternating electric field, discharge will occur in places with high electric field strength. Under normal circumstances, the energy of local discharge is very small and will not affect the insulation performance of the distribution switch cabinet, but continuous local discharge will form a series of electric pulses, generating very high temperatures on the medium at the local discharge point, causing the dielectric properties of the distribution switch cabinet insulation equipment to deteriorate, and ultimately leading to insulation breakdown and flashover. In more serious cases, it will cause arc short-circuit accidents, causing immeasurable economic losses.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiment of the present invention provides an intelligent partial discharge tester system and a monitoring method thereof, an electronic device and a storage medium, so as to at least solve the technical problem of inconvenient installation of the partial discharge tester in the related art.

[0006] According to one aspect of an embodiment of the present invention, there is provided an intelligent partial discharge tester system, wherein the partial discharge tester is used to connect to a high-voltage live display on a distribution switch cabinet to perform data sampling on a pulse current signal, wherein the distribution switch cabinet is not powered off during the connection between the partial discharge tester and the distribution switch cabinet; the partial discharge tester comprises: a built-in filter chip for filtering the pulse current signal; a built-in amplifier chip for amplifying the filtered pulse current signal; a built-in system software for analyzing the amplified pulse current signal to obtain the local discharge amount and discharge frequency, and calculating the local discharge intensity based on the local discharge amount and discharge frequency; a display for displaying the local discharge amount, discharge frequency and local discharge intensity, and issuing an alarm prompt when the local discharge intensity is greater than the alarm threshold.

[0007] Optionally, the types of displays include: an LED display screen, the LED display screen includes: a first alarm light, the first alarm light is used to issue a first alarm prompt, the first alarm prompt indicates that the partial discharge current of the distribution switch cabinet is within the abnormal current range; a second alarm light, the second alarm light is used to issue a second alarm prompt, the second alarm prompt indicates that the distribution switch cabinet needs to be shut down for maintenance.

[0008] According to one aspect of an embodiment of the present invention, a monitoring method for an intelligent partial discharge tester is provided, comprising: initializing system parameters, the system parameters including at least: a frequency for data sampling of a pulse current signal, a filter type and a filter window size for filtering the pulse current signal; performing data sampling and filtering on the pulse current signal; amplifying the filtered pulse current signal, and analyzing the amplified pulse current signal to obtain a partial discharge intensity; and issuing an alarm prompt when it is detected that the partial discharge intensity is greater than an alarm threshold.

[0009] Optionally, before data sampling of the pulse current signal, it also includes: generating a pulse current signal by a high-voltage coupling capacitor, and transmitting the pulse current signal to a high-voltage live display on the distribution switch cabinet, wherein the high-voltage coupling capacitor is located on the high-voltage bushing inside the distribution switch cabinet.

[0010] Optionally, the step of analyzing the amplified pulse current signal to obtain the local discharge intensity includes: analyzing the amplified pulse current signal through built-in system software to obtain the local discharge amount and discharge frequency; and calculating the local discharge intensity based on the local discharge amount and discharge frequency.

[0011] Optionally, when it is detected that the local discharge intensity is greater than the alarm threshold, the step of issuing an alarm prompt includes: when the local discharge intensity is less than or equal to the first alarm threshold, the first alarm light and the second alarm light are both in the off state, and the partial discharge current of the distribution switch cabinet is in the current safety range at the current moment; when the local discharge intensity is greater than the first alarm threshold and less than or equal to the second alarm threshold, the first alarm light is turned on and a first alarm prompt is issued, wherein the first alarm prompt is used to inform the operating object that the partial discharge current of the distribution switch cabinet is in the current abnormal range at the current moment, and the first alarm threshold is less than the second alarm threshold; when the local discharge intensity is greater than the second alarm threshold, the first alarm light is turned off, the second alarm light is turned on, and the second alarm prompt is issued, wherein the second alarm prompt is used to inform the operating object that the distribution switch cabinet needs to be powered off for maintenance.

[0012] Optionally, after analyzing the amplified pulse current signal, the partial discharge tester uploads the partial discharge test data to the terminal, and stores and manages the partial discharge test data, wherein the partial discharge test data at least includes: partial discharge amount, discharge frequency and partial discharge intensity.

[0013] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned monitoring methods for an intelligent partial discharge tester.

[0014] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement any one of the above-mentioned monitoring methods of the intelligent partial discharge tester.

[0015] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps of any one of the above-mentioned monitoring methods of the intelligent partial discharge tester are implemented.

[0016] In the present disclosure, the intelligent partial discharge tester system samples data of the pulse current signal by connecting the high-voltage live display on the distribution switch cabinet. The intelligent partial discharge tester system includes a built-in filter chip, a built-in amplifier chip, a built-in system software and a display. The built-in filter chip is used to filter the pulse current signal, and the built-in amplifier chip is used to amplify the filtered pulse current signal. The built-in system software is used to analyze the amplified pulse current signal to obtain the local discharge amount and discharge frequency, and calculate the local discharge intensity based on the local discharge amount and discharge frequency. The display is used to display the local discharge amount, discharge frequency and local discharge intensity, and issue an alarm prompt when the local discharge intensity is greater than the alarm threshold. In the present disclosure, the intelligent partial discharge tester system only needs to be connected to the high-voltage live display on the distribution switch cabinet, and the distribution switch cabinet does not need to be powered off during the connection process, which simplifies the installation process of the partial discharge tester. After the installation is completed, the pulse current signal is sampled, filtered, amplified and analyzed for the entire period, and the automatic alarm prompt can be completed, realizing the full-time monitoring of the distribution switch cabinet, thereby solving the technical problem of the inconvenience of installing the partial discharge tester in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a schematic diagram of an optional intelligent partial discharge tester system according to an embodiment of the present invention;

[0019] Figure 2 is a time domain diagram of an optional pulse current signal according to an embodiment of the present invention;

[0020] Figure 3 is a frequency domain diagram of an optional pulse current signal according to an embodiment of the present invention;

[0021] Figure 4 is a flow chart of an optional monitoring method of an intelligent partial discharge tester according to an embodiment of the present invention;

[0022] Figure 5 is an application diagram of an optional intelligent partial discharge tester system according to an embodiment of the present invention;

[0023] Figure 6 The present invention is a hardware structure block diagram of an electronic device (or mobile device) for a monitoring method of an intelligent partial discharge tester according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification 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 data 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] To facilitate those skilled in the art to understand the present invention, some terms or nouns involved in the embodiments of the present invention are explained below:

[0027] Distribution switchgear: It is a kind of equipment in the power system, responsible for distributing electrical energy, monitoring and controlling power lines and electrical equipment.

[0028] Partial discharge tester: an instrument used to detect partial discharge phenomena inside electrical equipment. It evaluates the operating status of electrical equipment and identifies potential problems by detecting the unique electromagnetic signals or acoustic signals generated during partial discharge.

[0029] Partial discharge phenomenon: It is a phenomenon caused by defects such as air gaps and impurities inside the insulation of electrical equipment. Under the action of high electric field strength, these defects will cause tiny breakdowns in local areas, thereby causing discharge.

[0030] It should be noted that the monitoring method and device of the intelligent partial discharge tester in the present disclosure can be used in the technical field of partial discharge testers when the intelligent partial discharge tester is used to monitor the distribution switch cabinet, and can also be used in any field except the technical field of partial discharge testers when the intelligent partial discharge tester is used to monitor the distribution switch cabinet. The application field of the monitoring method and device of the intelligent partial discharge tester in the present disclosure is not limited.

[0031] The following embodiments of the present invention can be applied to various intelligent partial discharge tester systems / applications / equipment. In the present invention, the intelligent partial discharge tester system only needs to be connected to the high-voltage live display on the distribution switch cabinet, and the distribution switch cabinet does not need to be powered off during the connection process, which simplifies the installation process of the partial discharge tester. After the installation is completed, the intelligent partial discharge tester system automatically performs full-time monitoring, samples, filters, amplifies and analyzes the pulse current signal at all times, and performs full-time intelligent alarms, thereby realizing full-time monitoring of the distribution switch cabinet.

[0032] The present invention is described in detail below in conjunction with various embodiments.

[0033] Embodiment 1

[0034] According to an embodiment of the present invention, an embodiment of an intelligent partial discharge tester system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0035] In the power system, the distribution switchgear is an important power equipment that can distribute power resources and protect and control power. Its operating status is directly related to the reliability and efficiency of the entire power network. The distribution switchgear has long been responsible for the distribution and control of high-voltage power. However, with the passage of time and changes in environmental conditions, the distribution switchgear is prone to various faults during use, including partial discharge. Partial discharge can cause the power system to fail to work properly, affecting the safe and stable operation of the power system.

[0036] Since the insulating equipment in the distribution switch cabinet generates bubbles or impurities during the manufacturing process, there are high-voltage conductor spikes, metal particle groups, and equipment manufacturing and installation defects inside the distribution switch cabinet. These characteristics and defects will cause uneven electric fields and dielectrics. Under the action of the alternating electric field, local discharge will occur in places with high electric field strength. Under normal circumstances, the energy of local discharge is very small and will not affect the insulation performance of the distribution switch cabinet. However, continuous local discharge will form a series of electric pulses, which will generate very high temperatures on the medium at the local discharge point, causing the dielectric properties of the distribution switch cabinet insulation equipment to deteriorate, and ultimately lead to insulation breakdown and flashover. In more serious cases, it will cause arc short-circuit accidents, causing immeasurable economic losses. Therefore, how to effectively monitor the local discharge phenomenon inside the distribution switch cabinet is an important issue for the stable operation and normal maintenance of the power system.

[0037] Existing partial discharge monitoring mainly relies on handheld detection equipment, which is performed regularly or randomly by the operator on the distribution switchgear. However, there are significant limitations to using handheld detection equipment to monitor partial discharge on distribution switchgear, including the inconvenience of installing handheld detection equipment, the high requirement for operator experience, the inconvenience of on-site operation, and the randomness and discontinuity of monitoring. In addition, since the on-site participation of the operator is required, the monitoring efficiency of partial discharge is low, and continuous and real-time monitoring cannot be achieved, thereby increasing the risk of power system failure.

[0038] In order to solve the above problems, an embodiment of the present invention provides an intelligent partial discharge tester. The intelligent partial discharge tester adopts advanced pulse current principle to monitor partial discharge signals, and obtains pulse current signals through high-voltage coupling capacitors embedded in the high-voltage bushings of the distribution switch cabinet. This non-invasive data acquisition method does not require power off for installation, which greatly simplifies the installation process of the partial discharge tester. The built-in filter chip and the built-in amplifier chip can effectively remove noise interference, improve the clarity of the pulse current signal, and ensure the accuracy and reliability of the data. Data analysis is performed through the built-in system software of the intelligent partial discharge tester, which can achieve fool-proof operation. Even operators without professional detection experience can understand the monitoring results and intuitively read the data of partial discharge amount, discharge frequency and partial discharge intensity from the display.

[0039] Figure 1 The present invention is a schematic diagram of an optional intelligent partial discharge tester system according to an embodiment of the present invention. The partial discharge tester is used to connect to a high-voltage live display on a distribution switch cabinet to perform data sampling on a pulse current signal. During the connection between the partial discharge tester and the distribution switch cabinet, the distribution switch cabinet is not powered off.

[0040] like Figure 1 As shown, the intelligent partial discharge tester includes: a built-in filter chip 11, a built-in amplifier chip 12, a built-in system software 13 and a display 14.

[0041] Among them, the built-in filter chip 11 is used to filter the pulse current signal; the built-in amplifier chip 12 is used to amplify the filtered pulse current signal; the built-in system software 13 is used to analyze the amplified pulse current signal to obtain the local discharge amount and discharge frequency, and calculate the local discharge intensity based on the local discharge amount and discharge frequency; the display 14 is used to display the local discharge amount, discharge frequency and local discharge intensity, and issue an alarm prompt when the local discharge intensity is greater than the alarm threshold.

[0042] The intelligent partial discharge tester in the embodiment of the present invention monitors partial discharge signals based on the pulse current principle. When partial discharge occurs in the distribution switch cabinet, it will cause the movement of charges. The moving charges can generate pulse current signals in the peripheral measurement circuit. By monitoring the pulse current signals, the partial discharge of the distribution switch cabinet can be measured. The pulse current principle usually represents the partial discharge current by monitoring the low-frequency part of the pulse current signal. Figure 2 is a time domain diagram of an optional pulse current signal according to an embodiment of the present invention. Figure 2 In the figure, the horizontal axis represents time and the vertical axis represents the amplitude of the pulse current signal. Figure 3 is a frequency domain diagram of an optional pulse current signal according to an embodiment of the present invention. Figure 3 In the figure, the horizontal axis represents the frequency of the pulse current signal, and the vertical axis represents the amplitude of the frequency of the pulse current signal. The frequency of the pulse current signal is usually several thousand hertz or hundreds of kilohertz, and can reach several megahertz in a few cases.

[0043] In an embodiment of the present invention, the innovative installation method of the intelligent partial discharge tester greatly improves its deployment efficiency on the distribution switch cabinet, while ensuring the safety of the operating object. Specifically, the intelligent partial discharge tester adopts a design of direct connection with the three holes of the high-voltage live display. This design cleverly utilizes the existing live display interface on the distribution switch cabinet, avoiding the cumbersome steps of the existing partial discharge tester to power off the distribution switch cabinet for installation. This improvement not only saves installation time and reduces unnecessary downtime of the power system, but more importantly, it can be installed without interrupting the power supply, greatly improving the operational continuity of the power system, and has a significant improvement effect on the stability and efficiency of the power system. In addition, the compatibility design of the intelligent partial discharge tester enables it to adapt to all types of high-voltage live displays, and it can seamlessly connect to all types of high-voltage live displays, which greatly expands the application scope of the intelligent partial discharge tester, so that no matter what type of high-voltage live display, it can be quickly and conveniently installed and started to run. This versatility not only simplifies the installation and debugging process of the intelligent partial discharge tester in the embodiment of the present invention, but also reduces the cost of different types of partial discharge testers required for different high-voltage live displays by power companies, thereby improving the wide applicability and economy of the intelligent partial discharge tester. Overall, the innovative installation method and excellent compatibility of the intelligent partial discharge tester not only solve the power outage and complex operation problems of the existing partial discharge tester during the installation process, but also greatly improve its deployment efficiency and application scope in the power system. It is a safe, convenient, economical and efficient partial discharge tester.

[0044] The core components of the intelligent partial discharge tester in the embodiment of the present invention include: a built-in filter chip, a built-in amplifier chip, a built-in system software and a display. These components work together to achieve accurate capture and intelligent analysis of partial discharge signals. Among them, the built-in filter chip is used to filter the original pulse current signal obtained through the high-voltage coupling capacitor, filter out high-frequency noise and irrelevant interference in the pulse current signal, and ensure the purity and reliability of the data for subsequent processing; the built-in amplifier chip is used to amplify the pulse current signal after filtering. Since the partial discharge signal is often very weak, it is unrealistic to analyze it directly. Therefore, the addition of a built-in amplifier chip is indispensable. The built-in amplifier chip uses a high-precision, low-noise amplifier circuit to amplify the weak pulse current signal to a level that can be detected and analyzed, ensuring that the subsequent data analysis has sufficient signal strength support; the built-in system software is used to amplify the pulse current signal after filtering. The amplified pulse current signal is deeply analyzed to extract the key features of the partial discharge signal, including the local discharge amount and the discharge frequency, and the local discharge intensity is calculated based on the local discharge amount and the discharge frequency; the display is a user interface, which is used to intuitively display key indicators such as the local discharge amount, the discharge frequency and the local discharge intensity. The embodiment of the present invention adopts an LED digital display screen to ensure that the data is clearly visible. More importantly, when the local discharge intensity exceeds the preset alarm threshold, the display can immediately issue an alarm prompt, and remind the operating object to pay attention through visual signals, so as to take timely measures to avoid the expansion of faults of power equipment due to local discharge, thereby ensuring the safe and stable operation of the power system.

[0045] In an embodiment of the present invention, a high-voltage coupling capacitor embedded in a high-voltage bushing inside a distribution switch cabinet generates a pulse current signal, which is transmitted to a high-voltage live display in the distribution switch cabinet. The intelligent partial discharge tester samples the pulse current signal generated at the location of the high-voltage coupling capacitor by connecting to the high-voltage live display. The built-in filter chip in the intelligent partial discharge tester filters the sampled pulse current signal, and then amplifies the filtered pulse current signal through a built-in amplifier chip. Finally, the amplified pulse current signal is analyzed through the built-in system software to obtain the local discharge amount and discharge frequency. The local discharge intensity is calculated based on the local discharge amount and discharge frequency. The intelligent partial discharge tester determines whether to issue an alarm based on the local discharge intensity.

[0046] The embodiment of the present invention pre-sets two alarm thresholds, namely the first alarm threshold and the second alarm threshold, wherein the first alarm threshold is less than the second alarm threshold, for example, the first alarm threshold is set to 450pC, and the second alarm threshold is set to 900pC, pC is a unit of measurement for measuring electric charge, and can be used to measure the intensity of partial discharge. When the intensity of partial discharge is less than or equal to the first alarm threshold, that is, the intensity of partial discharge is less than or equal to 450pC, the partial discharge current of the distribution switch cabinet belongs to the safe range, and no alarm prompt is required; when the intensity of partial discharge is greater than the first alarm threshold and less than or equal to the second alarm threshold, that is, the intensity of partial discharge is greater than 450pC and less than or equal to 900pC, the intelligent partial discharge tester issues a first alarm prompt, indicating that the partial discharge current of the distribution switch cabinet is in the abnormal current range, and notifies the operating object that the distribution switch cabinet needs to be paid attention to; when the intensity of partial discharge is greater than the second alarm threshold, that is, the intensity of partial discharge is greater than 900pC, the intelligent partial discharge tester issues a second alarm prompt, notifying the operating object that the distribution switch cabinet needs to be powered off for maintenance.

[0047] It should be noted that the intelligent partial discharge tester provided in the embodiment of the present invention is not only easy to install, but also has low power consumption. The intelligent partial discharge tester includes a built-in filter chip, a built-in amplifier chip, a built-in system software, and a display, wherein the display can be an LED display. Since the built-in filter chip, the built-in amplifier chip, the built-in system software, and the LED display are all low-power products, the total power consumption of the intelligent partial discharge tester is also relatively low.

[0048] Optionally, the types of displays include: an LED display screen, the LED display screen includes: a first alarm light, the first alarm light is used to issue a first alarm prompt, the first alarm prompt indicates that the partial discharge current of the distribution switch cabinet is within the abnormal current range; a second alarm light, the second alarm light is used to issue a second alarm prompt, the second alarm prompt indicates that the distribution switch cabinet needs to be shut down for maintenance.

[0049] In an embodiment of the present invention, the type of display can be selected as an LED display screen, and the LED display screen can intuitively display the partial discharge amount, discharge frequency and partial discharge intensity in digital form. The LED display screen also includes a first warning light and a second warning light. The first warning light is used to issue a first warning prompt, and the first warning prompt indicates that the partial discharge current of the distribution switch cabinet is in the abnormal current range. The second warning light is used to issue a second warning prompt, and the second warning prompt indicates that the distribution switch cabinet needs to be powered off for maintenance. The first warning light and the second warning light can be distinguished by color. In the embodiment of the present invention, the first warning light is set to a yellow light, and the second warning light is set to a red light.

[0050] The above-mentioned intelligent partial discharge tester system samples the pulse current signal by connecting to the high-voltage live display on the distribution switch cabinet. In the embodiment of the present invention, the intelligent partial discharge tester system only needs to be connected to the high-voltage live display on the distribution switch cabinet, and the distribution switch cabinet does not need to be powered off during the connection process, which simplifies the installation process of the partial discharge tester. After the installation is completed, the intelligent partial discharge tester system automatically implements full-time monitoring, and the operator does not need to squat next to the distribution switch cabinet to work, and the partial discharge monitoring experience of the operator is very low.

[0051] In the embodiment of the present invention, the intelligent partial discharge tester system includes a built-in filter chip, a built-in amplifier chip, a built-in system software and a display. The built-in filter chip is used to filter the pulse current signal, the built-in amplifier chip is used to amplify the filtered pulse current signal, and the built-in system software is used to analyze the amplified pulse current signal to obtain the local discharge amount and discharge frequency, and calculate the local discharge intensity based on the local discharge amount and discharge frequency. The display is used to display the local discharge amount, discharge frequency and local discharge intensity, and issue an alarm prompt when the local discharge intensity is greater than the alarm threshold. The intelligent partial discharge tester samples, filters, amplifies and analyzes the pulse current signal at all times, and can perform automatic alarm prompts to achieve full-time monitoring of the distribution switch cabinet, thereby solving the technical problem of inconvenient installation of the partial discharge tester in the related technology.

[0052] The following is a detailed description in conjunction with another embodiment.

[0053] Embodiment 2

[0054] An embodiment of a monitoring method for an intelligent partial discharge tester is provided in this embodiment. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0055] Figure 4 is a flow chart of an optional monitoring method of an intelligent partial discharge tester according to an embodiment of the present invention, such as Figure 4 As shown, the method comprises the following steps:

[0056] Step S401 , initializing system parameters, which at least include: a frequency of data sampling for a pulse current signal, a filter type for filtering the pulse current signal, and a filter window size.

[0057] The monitoring method of the intelligent partial discharge tester provided in the embodiment of the present invention is applied to the intelligent partial discharge tester system. Figure 5is an application diagram of an optional intelligent partial discharge tester system according to an embodiment of the present invention, from Figure 5 It can be seen that the high-voltage bushing inside the distribution switch cabinet is equipped with a high-voltage coupling capacitor. The high-voltage coupling capacitor generates a pulse current signal, which is transmitted to the high-voltage live display on the distribution switch cabinet. The intelligent partial discharge tester samples the pulse current signal by connecting to the high-voltage live display, filters, amplifies and analyzes the sampled pulse current signal, and obtains the local discharge intensity at the high-voltage coupling capacitor in the distribution switch cabinet. The intelligent partial discharge tester determines whether to issue an alarm and what kind of alarm to issue based on the magnitude of the local discharge intensity.

[0058] Before using the intelligent partial discharge tester in the embodiment of the present invention, it is necessary to initialize system parameters, and the system parameters include at least: the frequency of data sampling for the pulse current signal, the filter type and filter window size for filtering the pulse current signal. After setting the system parameters, the intelligent partial discharge tester is put into use.

[0059] Optionally, before data sampling of the pulse current signal, it also includes: generating a pulse current signal by a high-voltage coupling capacitor, and transmitting the pulse current signal to a high-voltage live display on the distribution switch cabinet, wherein the high-voltage coupling capacitor is located on the high-voltage bushing inside the distribution switch cabinet.

[0060] In an embodiment of the present invention, before data sampling of the pulse current signal, the high-voltage coupling capacitor installed on the high-voltage bushing inside the distribution switch cabinet utilizes the electric field coupling principle between the high-voltage electric field and the sensor to generate a pulse current signal. At the same time, the high-voltage coupling capacitor transmits the pulse current signal to the high-voltage live display on the distribution switch cabinet. Then, the intelligent partial discharge tester samples the pulse current signal by connecting to the high-voltage live display. The sampled pulse current signal is filtered, amplified, and analyzed to finally obtain the local discharge intensity at the high-voltage coupling capacitor in the distribution switch cabinet.

[0061] Step S402, performing data sampling and filtering processing on the pulse current signal.

[0062] In an embodiment of the present invention, the intelligent partial discharge tester samples the pulse current signal by connecting to a high-voltage live display. The built-in filter chip in the intelligent partial discharge tester filters the sampled pulse current signal to remove noise interference in the pulse current signal for subsequent amplification processing.

[0063] Step S403, amplifying the filtered pulse current signal, and analyzing the amplified pulse current signal to obtain the partial discharge intensity.

[0064] In an embodiment of the present invention, after the built-in filtering chip in the intelligent partial discharge tester filters the sampled pulse current signal, the built-in amplifier chip amplifies the filtered pulse current signal, and then the built-in system software analyzes the amplified pulse current signal to obtain the local discharge intensity at the high-voltage coupling capacitor in the distribution switch cabinet. The intelligent partial discharge tester determines whether to issue an alarm and what kind of alarm to issue based on the magnitude of the local discharge intensity.

[0065] Optionally, the step of analyzing the amplified pulse current signal to obtain the local discharge intensity includes: analyzing the amplified pulse current signal through built-in system software to obtain the local discharge amount and discharge frequency; and calculating the local discharge intensity based on the local discharge amount and discharge frequency.

[0066] In the embodiment of the present invention, when the amplified pulse current signal is analyzed to obtain the partial discharge intensity, the built-in system software first obtains the partial discharge amount and the discharge frequency when analyzing the amplified pulse current signal, and then calculates the partial discharge intensity based on the partial discharge amount and the discharge frequency. The partial discharge intensity is a comprehensive indicator that combines the magnitude of the partial discharge amount and the height of the discharge frequency, and can more comprehensively evaluate the severity of the partial discharge inside the distribution switch cabinet, thereby providing more accurate data support for subsequent fault diagnosis and maintenance strategies.

[0067] Step S404: when it is detected that the local discharge intensity is greater than the alarm threshold, an alarm prompt is issued.

[0068] In an embodiment of the present invention, the intelligent partial discharge tester samples the pulse current signal by connecting to a high-voltage live display, and then filters, methods and analyzes the sampled pulse current signal to obtain the local discharge intensity. The intelligent partial discharge tester determines whether to issue an alarm and what kind of alarm to issue based on the magnitude of the local discharge intensity. The embodiment of the present invention pre-sets two alarm thresholds, namely the first alarm threshold and the second alarm threshold, wherein the first alarm threshold is less than the second alarm threshold. When it is detected that the local discharge intensity is greater than the first alarm threshold and less than or equal to the second alarm threshold, the intelligent partial discharge tester issues a first alarm; when it is detected that the local discharge intensity is greater than the second alarm threshold, the intelligent partial discharge tester issues a second alarm.

[0069] Optionally, when it is detected that the local discharge intensity is greater than the alarm threshold, the step of issuing an alarm prompt includes: when the local discharge intensity is less than or equal to the first alarm threshold, the first alarm light and the second alarm light are both in the off state, and the partial discharge current of the distribution switch cabinet is in the current safety range at the current moment; when the local discharge intensity is greater than the first alarm threshold and less than or equal to the second alarm threshold, the first alarm light is turned on and a first alarm prompt is issued, wherein the first alarm prompt is used to inform the operating object that the partial discharge current of the distribution switch cabinet is in the current abnormal range at the current moment, and the first alarm threshold is less than the second alarm threshold; when the local discharge intensity is greater than the second alarm threshold, the first alarm light is turned off, the second alarm light is turned on, and the second alarm prompt is issued, wherein the second alarm prompt is used to inform the operating object that the distribution switch cabinet needs to be powered off for maintenance.

[0070] In the embodiment of the present invention, the first alarm threshold is set to 450 pC, and the second alarm threshold is set to 900 pC. pC is a unit of measurement for electric charge and can be used to measure the intensity of partial discharge. When the local discharge intensity is less than or equal to the first alarm threshold, that is, the local discharge intensity is less than or equal to 450pC, the partial discharge current of the distribution switch cabinet is within the safe range and no alarm is required. At this time, the first alarm light and the second alarm light are both in the off state; when the local discharge intensity is greater than the first alarm threshold and less than or equal to the second alarm threshold, that is, the local discharge intensity is greater than 450pC and less than or equal to 900pC, the intelligent partial discharge tester turns on the first alarm light and issues a first alarm prompt, indicating that the partial discharge current of the distribution switch cabinet is within the abnormal current range, informing the operator that the distribution switch cabinet needs to be paid attention to; when the local discharge intensity is greater than the second alarm threshold, that is, the local discharge intensity is greater than 900pC, the intelligent partial discharge tester issues a second alarm prompt, informing the operator that the distribution switch cabinet needs to be powered off for maintenance.

[0071] Optionally, after analyzing the amplified pulse current signal, the partial discharge tester uploads the partial discharge test data to the terminal, and stores and manages the partial discharge test data, wherein the partial discharge test data at least includes: partial discharge amount, discharge frequency and partial discharge intensity.

[0072] In the embodiment of the present invention, the intelligent partial discharge tester can not only monitor and analyze the partial discharge phenomenon inside the distribution switch cabinet in real time, but also has the intelligent function of remote data transmission and management, which greatly improves the practicality and convenience of the intelligent partial discharge tester system. The intelligent partial discharge tester can upload the partial discharge test data to the terminal, store and manage the partial discharge test data, and the partial discharge test data includes but is not limited to the partial discharge amount, discharge frequency and partial discharge intensity. Each partial discharge test data is crucial to evaluate the insulation state of the distribution switch cabinet and predict potential faults. By remotely transmitting the partial discharge test data to the terminal, the intelligent partial discharge tester can save and manage historical data, which is convenient for future calls to historical data.

[0073] The monitoring method of the above-mentioned intelligent partial discharge tester provides steps, by connecting the intelligent partial discharge tester to the high-voltage live display on the distribution switch cabinet, the pulse current signal is sampled. The intelligent partial discharge tester system includes a built-in filter chip, a built-in amplifier chip, a built-in system software and a display. The built-in filter chip is used to filter the pulse current signal, the built-in amplifier chip is used to amplify the filtered pulse current signal, the built-in system software is used to analyze the amplified pulse current signal to obtain the local discharge amount and discharge frequency, and the local discharge intensity is calculated based on the local discharge amount and discharge frequency. The display is used to display the local discharge amount, discharge frequency and local discharge intensity, and issue an alarm prompt when the local discharge intensity is greater than the alarm threshold. In this embodiment, the intelligent partial discharge tester system only needs to be connected to the high-voltage live display on the distribution switch cabinet, and the distribution switch cabinet does not need to be powered off during the connection process, which simplifies the installation process of the partial discharge tester. After the installation is completed, the intelligent partial discharge tester system automatically implements full-time monitoring, samples, filters, amplifies and analyzes the pulse current signal at all times, and can perform automatic alarm prompts to achieve full-time monitoring of the distribution switch cabinet, thereby solving the technical problem of the inconvenient installation of the partial discharge tester in the related technology.

[0074] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the monitoring method of the intelligent partial discharge tester of any one of the above-mentioned embodiments.

[0075] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement the monitoring method of the intelligent partial discharge tester of any one of the above-mentioned embodiments one.

[0076] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the monitoring method of the intelligent partial discharge tester described in each embodiment of the present application.

[0077] The present application also provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the monitoring method of the intelligent partial discharge tester described in each embodiment of the present application are implemented.

[0078] Figure 6 1 is a hardware structure block diagram of an electronic device (or mobile device) for a monitoring method of an intelligent partial discharge tester according to an embodiment of the present invention. Figure 6 As shown, the electronic device may include one or more ( Figure 6 602a, 602b, ..., 602n are used to illustrate) a processor (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 604 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a keyboard, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 6 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 6 More or fewer components as shown, or with Figure 6 Different configurations shown.

[0079] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0080] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0082] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0083] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0084] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An intelligent partial discharge tester system, characterized in that: The partial discharge tester is used to connect to the high-voltage live display on the power distribution switch cabinet to perform data sampling on the pulse current signal, wherein the power distribution switch cabinet is not powered off during the process of connecting the partial discharge tester to the power distribution switch cabinet; The partial discharge tester comprises: A built-in filter chip is used to filter the pulse current signal; A built-in amplifier chip is used to amplify the pulse current signal after filtering; Built-in system software, used for analyzing the amplified pulse current signal to obtain the local discharge amount and the discharge frequency, and calculating the local discharge intensity based on the local discharge amount and the discharge frequency; The display is used to display the local discharge amount, the discharge frequency and the local discharge intensity, and to issue an alarm prompt when the local discharge intensity is greater than an alarm threshold.

2. The intelligent partial discharge tester system according to claim 1, characterized in that: The types of the display include: LED display screen, and the LED display screen includes: A first warning light, the first warning light is used to issue a first warning prompt, the first warning prompt indicates that the partial discharge current of the power distribution switch cabinet is within the abnormal current range; The second warning light is used to issue a second warning prompt, and the second warning prompt indicates that the distribution switch cabinet needs to be shut down for maintenance.

3. A monitoring method for an intelligent partial discharge tester, characterized in that: The intelligent partial discharge tester system applied to any one of claims 1 or 2 comprises: Initializing system parameters, the system parameters at least including: a frequency of data sampling for the pulse current signal, a filter type and a filter window size for filtering the pulse current signal; Performing data sampling and filtering processing on the pulse current signal; amplifying the filtered pulse current signal, and analyzing the amplified pulse current signal to obtain a partial discharge intensity; When it is detected that the local discharge intensity is greater than the alarm threshold, an alarm prompt is issued.

4. The monitoring method according to claim 3, characterized in that: Before data sampling is performed on the pulse current signal, the method further includes: The pulse current signal is generated by a high-voltage coupling capacitor and transmitted to a high-voltage live display on a distribution switch cabinet, wherein the high-voltage coupling capacitor is located on a high-voltage bushing inside the distribution switch cabinet.

5. The monitoring method according to claim 3, characterized in that: The step of analyzing the amplified pulse current signal to obtain the local discharge intensity includes: The amplified pulse current signal is analyzed by built-in system software to obtain the partial discharge amount and discharge frequency; The local discharge intensity is calculated based on the local discharge amount and the discharge frequency.

6. The monitoring method according to claim 3, characterized in that: When it is detected that the local discharge intensity is greater than the alarm threshold, the step of issuing an alarm prompt comprises: When the partial discharge intensity is less than or equal to the first alarm threshold, the first warning light and the second warning light are both in an off state, and the partial discharge current of the power distribution switch cabinet is within a current safety range at the current moment; When the partial discharge intensity is greater than the first alarm threshold and less than or equal to the second alarm threshold, the first alarm light is turned on and a first alarm prompt is issued, wherein the first alarm prompt is used to inform the operating object that the partial discharge current of the distribution switch cabinet is in the abnormal current range at the current moment, and the first alarm threshold is less than the second alarm threshold; When the local discharge intensity is greater than the second alarm threshold, the first alarm light is turned off, the second alarm light is turned on, and a second alarm prompt is issued, wherein the second alarm prompt is used to inform the operating object that the distribution switch cabinet needs to be powered off for maintenance.

7. The monitoring method according to claim 3, characterized in that: After analyzing the amplified pulse current signal, the method comprises: The partial discharge tester uploads the partial discharge test data to the terminal, and stores and manages the partial discharge test data, wherein the partial discharge test data at least includes: the partial discharge amount, the discharge frequency and the partial discharge intensity.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the monitoring method of the intelligent partial discharge tester according to any one of claims 3 to 7.

9. An electronic device, characterized in that: It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the monitoring method of the intelligent partial discharge tester as described in any one of claims 3 to 7.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the monitoring method of the intelligent partial discharge tester described in any one of claims 3 to 7 are implemented.

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