A method and system for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester.

Abstract

This invention relates to a method and system for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester. The method includes: performing Fourier decomposition on the collected surge arrester leakage current and bus voltage to obtain the fundamental and third harmonic components corresponding to the leakage current and bus voltage; comparing the fundamental and third harmonic components of the leakage current with given reference values; and correcting the fundamental and third harmonic components of the leakage current based on the comparison results using the fundamental and third harmonic components of the bus voltage and the current ambient temperature; and obtaining the surge arrester's operating status based on the correction results. This invention decomposes the leakage current into fundamental and third harmonic components, monitors ambient temperature, bus voltage, and harmonic levels, and corrects abnormal fundamental and third harmonic measurements, accurately distinguishing between internal moisture ingress and resistor aging faults in the surge arrester. This invention can be widely applied in the field of high-voltage direct current transmission technology.

Description

Technical Field

[0001] This invention relates to a method and system for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester, belonging to the field of high-voltage direct current transmission technology. Background Technology

[0002] The controllable self-resetting energy dissipation device is essentially an energy absorption device, consisting of zinc oxide resistive elements (hereinafter referred to as resistive elements) and a bypass switch. The number of resistive elements in operation can be dynamically controlled via the bypass switch. The controllable self-resetting energy dissipation device can be installed on the AC or DC side of a high-voltage direct current transmission system as needed. During normal operation, all resistive elements are connected to the system and exhibit high resistance. In case of a fault, the bypass switch closes, disconnecting the controllable portion of the resistive elements, thus putting the energy dissipation device into an energy absorption state and effectively limiting the overvoltage level of the power grid.

[0003] In reality, during normal operation of a controllable self-recovering energy dissipation device, although the resistor element is in a high-resistance state, a very small current still flows through it. Harmonics from the converter station and external environmental factors can cause the resistor element to age or become damp, leading to increased leakage current and power consumption. If this is not addressed promptly, it can cause the valve plate temperature to become excessively high or even thermally collapse, ultimately damaging the equipment and endangering power system safety. To detect potential hazards in a timely manner, it is necessary to monitor the status of metal oxide surge arresters. The most effective method is online monitoring of their leakage current.

[0004] The leakage current of a metal oxide surge arrester includes capacitive current and resistive current, with changes in resistive current reflecting the arrester's operating status. Two main factors influence the arrester's operating status: internal moisture and aging of the resistive elements. Existing research indicates that the fundamental component of the resistive current characterizes the internal moisture level of the arrester, increasing with moisture levels. Conversely, the third harmonic component of the resistive current characterizes the aging process of the arrester, increasing with more severe aging.

[0005] As can be seen from the characteristics of surge arresters, leakage current increases with temperature at the same voltage. For the DC side, the converter acts as a harmonic voltage source, fluctuating with power changes, which affects the third harmonic. Currently, although UHV converter stations are equipped with leakage current monitoring devices for surge arresters, they only monitor resistive leakage current, failing to distinguish between the fundamental and third harmonic components, and do not consider the influence of temperature and harmonics on the leakage current. Therefore, they cannot accurately reflect the operating status of the surge arresters. Summary of the Invention

[0006] To address the aforementioned problems, the purpose of this invention is to provide a method and system for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester. This system can effectively eliminate interference factors, effectively monitor the fundamental and third harmonic components of resistive leakage current, and accurately reflect the operating status of the surge arrester.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a method for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester, comprising the following steps:

[0009] Fourier decomposition was performed on the collected surge arrester leakage current and bus voltage to obtain the fundamental and third harmonic components corresponding to the leakage current and bus voltage.

[0010] The fundamental and third harmonic components of the leakage current are compared with given reference values. Based on the comparison results, the fundamental and third harmonic components of the leakage current are corrected using the fundamental and third harmonic components of the bus voltage and the current ambient temperature. The operating status of the surge arrester is obtained based on the correction results.

[0011] Furthermore, when collecting the leakage current of the surge arrester, a Hall element sensor is used for measurement.

[0012] Furthermore, the fundamental and third harmonic components of the leakage current are compared with given reference values, and the fundamental and third harmonic components of the leakage current are corrected based on the comparison results using the fundamental and third harmonic components of the bus voltage and the current ambient temperature. The operating status of the surge arrester is then obtained based on the correction results, including:

[0013] The fundamental and third harmonic components of the leakage current are compared with given reference values ​​for the fundamental and third harmonic components, respectively:

[0014] If the fundamental component of the leakage current is greater than the given reference value of the fundamental component, the fundamental component of the leakage current is corrected according to the fundamental component of the synchronous bus voltage and the influence of the current ambient temperature on the leakage current; if the fundamental component of the leakage current is still greater than the given reference value of the fundamental component after correction, an alarm message is given, indicating that the surge arrester is damp.

[0015] If the third harmonic component of the leakage current is greater than the given reference value of the third harmonic component, the third harmonic component of the leakage current is corrected according to the third harmonic component of the synchronous bus voltage and the current ambient temperature; if the value of the third harmonic component of the leakage current is still greater than the given reference value of the third harmonic component after correction, an alarm message is given, indicating that the surge arrester is seriously aging.

[0016] Furthermore, the given fundamental component reference value and the given third harmonic component reference value include:

[0017] The relationship curves between ambient temperature and the fundamental component and third harmonic component of leakage current were obtained respectively.

[0018] The relationship curves between the fundamental component and the third harmonic component of the bus voltage and the fundamental component and the third harmonic component of the leakage current were obtained respectively.

[0019] Based on the obtained relationship curves, the reference values ​​of the fundamental and third harmonic components of the leakage current are determined, and the reference values ​​of the ambient temperature and the fundamental and third harmonic components of the bus voltage corresponding to the reference values ​​of the fundamental and third harmonic components of the leakage current are also determined.

[0020] Furthermore, when correcting the fundamental component of the leakage current based on the influence of the fundamental component of the synchronous bus voltage and ambient temperature on the leakage current, the following steps are taken:

[0021] The fundamental component of the current bus voltage and the current ambient temperature are subtracted from the reference values ​​of the fundamental bus voltage and the ambient temperature corresponding to the reference values ​​of the fundamental component, respectively, to obtain the first bus voltage influence value and the first temperature influence value.

[0022] Calculate the impact of the difference between the first bus voltage and the first temperature on the fundamental component of the leakage current based on the impact value of the first bus voltage and the first temperature.

[0023] The correction value of the fundamental component of the leakage current is obtained by subtracting the influence value from the measured value of the fundamental component of the leakage current.

[0024] Furthermore, when correcting the third harmonic component of the leakage current, the following steps are included:

[0025] The third harmonic component of the current bus voltage and the current ambient temperature are respectively subtracted from the reference values ​​of the third harmonic component of the leakage current and the reference values ​​of the bus voltage and ambient temperature corresponding to the reference value of the third harmonic component of the leakage current to obtain the second bus voltage influence value and the second temperature influence value.

[0026] Based on the influence values ​​of the second bus voltage and the second temperature, calculate the influence value of their difference on the third harmonic component of the leakage current;

[0027] The correction value of the third harmonic component of the leakage current is obtained by subtracting the influence value from the measured value of the third harmonic component of the leakage current.

[0028] Secondly, the present invention provides a controllable self-recovering energy dissipation device surge arrester operation status monitoring system, comprising:

[0029] The data acquisition and decomposition module is used to perform Fourier decomposition on the acquired surge arrester leakage current and bus voltage respectively to obtain the fundamental component and third harmonic component corresponding to the leakage current and bus voltage.

[0030] The operating status determination module is used to compare the fundamental and third harmonic components of the leakage current with a given reference value. Based on the comparison result, the fundamental and third harmonic components of the leakage current are corrected using the fundamental and third harmonic components of the bus voltage and the current ambient temperature. The operating status of the surge arrester is obtained based on the correction result.

[0031] Furthermore, the operating status determination module includes:

[0032] The comparison module is used to compare the fundamental component and the third harmonic component of the leakage current with a given reference value for the fundamental component and a given reference value for the third harmonic component, respectively.

[0033] The fundamental component correction module is used to correct the measured value of the fundamental component of the leakage current when the fundamental component of the leakage current is greater than the given fundamental component reference value, based on the fundamental component of the synchronous bus voltage and the influence of ambient temperature on the leakage current.

[0034] The third harmonic component correction module is used to correct the measured value of the third harmonic component of the leakage current based on the third harmonic component of the synchronous bus voltage and the ambient temperature when the third harmonic component of the leakage current is greater than the given third harmonic component reference value.

[0035] The alarm module is used to issue an alarm message if the fundamental component of the leakage current after correction is still greater than the given fundamental component reference value, indicating that the surge arrester is damp inside; and to issue an alarm message if the third harmonic component of the leakage current after correction is still greater than the given third harmonic component reference value, indicating that the surge arrester is severely aging.

[0036] Thirdly, the present invention provides a processing device, which includes at least a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the steps of the method for monitoring the operating status of the controllable self-recovering energy dissipation device surge arrester when running the computer program.

[0037] Fourthly, the present invention provides a computer storage medium storing computer-readable instructions thereon, which can be executed by a processor to implement the steps of the controllable self-recovering energy dissipation device surge arrester operation status monitoring method.

[0038] This invention, by adopting the above technical solution, has the following advantages: It decomposes the leakage current into a fundamental component and a third harmonic component, while simultaneously monitoring ambient temperature, bus voltage, and the third harmonic level, and correcting for abnormal fundamental and third harmonic measurements. This allows for accurate differentiation between internal moisture in the surge arrester and aging faults in the resistor elements. In summary, this invention can be widely applied in the field of high-voltage direct current transmission technology. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0040] Figure 1 This is a schematic diagram of the surge arrester operation status monitoring method provided in an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] In some embodiments of the present invention, a method for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester is provided, comprising: monitoring the leakage current of the surge arrester and decomposing it into a fundamental component and a third harmonic component; comparing the fundamental component and the third harmonic component with a given reference value; if the monitored value exceeds the reference value, correcting the monitored value according to the ambient temperature or bus harmonic level, and comparing it with the reference value again; if the corrected value is still greater than the reference value, issuing a warning, and indicating that the surge arrester is internally damp or severely aged according to the abnormal data phase.

[0044] Correspondingly, other embodiments of the present invention provide a controllable self-recovering energy dissipation device surge arrester operation status monitoring system, device, and storage medium.

[0045] Example 1

[0046] like Figure 1 As shown, this embodiment provides a method for monitoring the operating status of a controllable self-resetting energy dissipation device surge arrester, used to monitor the operating status of the surge arrester, including the following steps:

[0047] 1) Perform Fourier decomposition on the collected surge arrester leakage current and bus voltage respectively to obtain the fundamental component and third harmonic component corresponding to the leakage current and bus voltage.

[0048] 2) Compare the fundamental and third harmonic components of the leakage current with the reference values. Based on the comparison results, use the fundamental and third harmonic components of the bus voltage to correct the fundamental and third harmonic components of the leakage current, and obtain the operating status of the surge arrester based on the correction results.

[0049] Furthermore, in step 1) above, the surge arrester leakage current collected is resistive current, and mainly fundamental current. Therefore, appropriate equipment should be selected for measuring the leakage current, such as a Hall element sensor.

[0050] Furthermore, in step 2) above, the reference values ​​for the fundamental and third harmonic components of the leakage current can be obtained through preliminary experimental methods. Specifically, this includes:

[0051] The relationship curves between ambient temperature and the fundamental component and third harmonic component of leakage current were obtained respectively.

[0052] The relationship curves between the fundamental component and the third harmonic component of the bus voltage and the fundamental component and the third harmonic component of the leakage current were obtained respectively.

[0053] Based on the obtained relationship curves, the reference values ​​of the fundamental and third harmonic components of the leakage current are determined, and the reference values ​​of the ambient temperature and the fundamental and third harmonic components of the bus voltage corresponding to the reference values ​​of the fundamental and third harmonic components of the leakage current are also determined.

[0054] The reference values ​​for the fundamental and third harmonic components of the leakage current can also be corrected based on data from on-site operation.

[0055] Furthermore, step 2 above specifically includes the following steps:

[0056] The fundamental and third harmonic components of the leakage current are compared with reference values:

[0057] If the fundamental component of the leakage current is greater than the reference value of the fundamental component, the measured value of the fundamental component of the leakage current is corrected according to the fundamental component of the synchronous bus voltage and the influence of ambient temperature on the leakage current; if the fundamental component of the leakage current is still greater than the reference value of the fundamental component after correction, an alarm message is given to indicate that the surge arrester is damp.

[0058] If the third harmonic component of the leakage current is greater than the reference value of the third harmonic component, the measured value of the third harmonic component of the leakage current is corrected according to the third harmonic component of the synchronous bus voltage and the ambient temperature; if the value of the third harmonic component of the leakage current is still greater than the reference value of the third harmonic component after correction, an alarm message is given, indicating that the surge arrester is seriously aging.

[0059] Furthermore, in step 2) above, when correcting the measured value of the fundamental component of the leakage current based on the influence of the fundamental component of the synchronous bus voltage and ambient temperature on the leakage current, the following steps are included:

[0060] The fundamental component of the current bus voltage and the current ambient temperature are subtracted from the reference values ​​of the fundamental voltage and ambient temperature corresponding to the reference values ​​of the fundamental component, respectively, to obtain the influence value δ of the first bus voltage. U and the first temperature influence value δ T ;

[0061] Based on the influence value δ of the first bus voltage U and the first temperature influence value δ T Calculate the influence value δ of the difference between the two on the fundamental component of the leakage current. 基 =δ T +δ U。

[0062] The correction value of the fundamental component of the leakage current is obtained by subtracting the influence value from the measured value of the fundamental component, i.e., the correction value I of the fundamental component. 基 '=I 基 -δ 基 .

[0063] Furthermore, when correcting the third harmonic component of the leakage current, the following steps are included:

[0064] The third harmonic component of the current bus voltage and the current ambient temperature are respectively subtracted from the reference values ​​of the third harmonic component of the leakage current and the reference values ​​of the bus voltage and ambient temperature corresponding to the reference value of the third harmonic component of the leakage current to obtain the second bus voltage influence value and the second temperature influence value.

[0065] Based on the influence values ​​of the second bus voltage and the second temperature, calculate the influence value δ of the difference between the two on the third harmonic component of the leakage current. 三 ;

[0066] The correction value I of the third harmonic component of the leakage current is obtained by subtracting the influence value from the measured value of the third harmonic component of the leakage current. 三 '=I 三 -δ 三 .

[0067] Example 2

[0068] Embodiment 1 above provides a method for monitoring the operating status of a controllable self-resetting energy dissipation device surge arrester. Correspondingly, this embodiment provides a system for monitoring the operating status of a controllable self-resetting energy dissipation device surge arrester. The system provided in this embodiment can implement the method for monitoring the operating status of a controllable self-resetting energy dissipation device surge arrester of Embodiment 1. This system can be implemented through software, hardware, or a combination of both. For example, the system may include integrated or separate functional modules or functional units to execute the corresponding steps in the methods of Embodiment 1. Since the system in this embodiment is basically similar to the method embodiment, the description process in this embodiment is relatively simple. For relevant details, please refer to the description of Embodiment 1. The system embodiment provided in this embodiment is merely illustrative.

[0069] The controllable self-recovering energy dissipation device surge arrester operation status monitoring system provided in this embodiment includes:

[0070] The data acquisition and decomposition module is used to perform Fourier decomposition on the acquired surge arrester leakage current and bus voltage respectively to obtain the fundamental component and third harmonic component corresponding to the leakage current and bus voltage.

[0071] The operating status determination module is used to compare the fundamental and third harmonic components of the leakage current with a given reference value, and correct the fundamental and third harmonic components of the leakage current using the fundamental and third harmonic components of the bus voltage based on the comparison results. At the same time, the operating status of the surge arrester is obtained based on the correction results.

[0072] Example 3

[0073] This embodiment provides a processing device corresponding to the controllable self-recovering energy dissipation device surge arrester operation status monitoring method provided in Embodiment 1. The processing device can be a processing device for a client, such as a mobile phone, laptop, tablet computer, desktop computer, etc., to execute the method of Embodiment 1.

[0074] The processing device includes a processor, a memory, a communication interface, and a bus. The processor, memory, and communication interface are connected via the bus to enable communication between them. The memory stores a computer program that can run on the processor. When the processor runs the computer program, it executes the controllable self-recovering energy dissipation device surge arrester operation status monitoring method provided in Embodiment 1.

[0075] In some embodiments, the memory may be high-speed random access memory (RAM), and may also include non-volatile memory, such as at least one disk storage device.

[0076] In other embodiments, the processor can be a general-purpose processor of various types, such as a central processing unit (CPU) or a digital signal processor (DSP), and is not limited thereto.

[0077] Example 4

[0078] The controllable self-recovering energy dissipation device surge arrester operation status monitoring method of Embodiment 1 can be specifically implemented as a computer program product. The computer program product may include a computer-readable storage medium on which computer-readable program instructions for executing the controllable self-recovering energy dissipation device surge arrester operation status monitoring method of Embodiment 1 are loaded.

[0079] A computer-readable storage medium can be a tangible device that holds and stores instructions for use by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester, characterized in that, Includes the following steps: Fourier decomposition was performed on the collected surge arrester leakage current and bus voltage to obtain the fundamental and third harmonic components corresponding to the leakage current and bus voltage. The fundamental and third harmonic components of the leakage current are compared with given reference values. Based on the comparison results, the fundamental and third harmonic components of the leakage current are corrected using the fundamental and third harmonic components of the bus voltage and the current ambient temperature. The operating status of the surge arrester is obtained based on the correction results, including: The fundamental and third harmonic components of the leakage current are compared with given reference values ​​for the fundamental and third harmonic components, respectively: If the fundamental component of the leakage current is greater than the given reference value of the fundamental component, the fundamental component of the leakage current is corrected according to the fundamental component of the synchronous bus voltage and the influence of the current ambient temperature on the leakage current; if the fundamental component of the leakage current is still greater than the given reference value of the fundamental component after correction, an alarm message is given, indicating that the surge arrester is damp. If the third harmonic component of the leakage current is greater than the given reference value of the third harmonic component, the third harmonic component of the leakage current is corrected according to the third harmonic component of the synchronous bus voltage and the current ambient temperature; if the value of the third harmonic component of the leakage current is still greater than the given reference value of the third harmonic component after correction, an alarm message is given, indicating that the surge arrester is seriously aging. The correction of the fundamental component of the leakage current based on the influence of the fundamental component of the synchronous bus voltage and ambient temperature on the leakage current includes: subtracting the fundamental component of the current bus voltage and the current ambient temperature from the reference values ​​of the fundamental bus voltage and ambient temperature corresponding to the reference values ​​of the fundamental component, respectively, to obtain the first bus voltage influence value and the first temperature influence value; calculating the influence value of the difference between the first bus voltage influence value and the first temperature influence value on the fundamental component of the leakage current; and subtracting the influence value from the measured value of the fundamental component of the leakage current to obtain the correction value of the fundamental component of the leakage current. When correcting the third harmonic component of the leakage current, the following steps are taken: the third harmonic component of the current bus voltage and the current ambient temperature are subtracted from the reference values ​​of the third harmonic voltage of the bus voltage and the ambient temperature corresponding to the reference value of the third harmonic component of the leakage current, respectively, to obtain the second bus voltage influence value and the second temperature influence value; based on the second bus voltage influence value and the second temperature influence value, the influence value of the difference between the two on the third harmonic component of the leakage current is calculated; the measured value of the third harmonic component of the leakage current is subtracted from the influence value to obtain the correction value of the third harmonic component of the leakage current.

2. The method for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester as described in claim 1, characterized in that: When collecting leakage current data from surge arresters, Hall effect sensors are used for measurement.

3. The method for monitoring the operating status of a controllable self-recovering energy dissipation device surge arrester as described in claim 1, characterized in that: The given fundamental component reference value and the given third harmonic component reference value include: The relationship curves between ambient temperature and the fundamental component and third harmonic component of leakage current were obtained respectively. The relationship curves between the fundamental component and the third harmonic component of the bus voltage and the fundamental component and the third harmonic component of the leakage current were obtained respectively. Based on the obtained relationship curves, the reference values ​​of the fundamental and third harmonic components of the leakage current are determined, and the reference values ​​of the ambient temperature and the fundamental and third harmonic components of the bus voltage corresponding to the reference values ​​of the fundamental and third harmonic components of the leakage current are also determined.

4. A controllable self-recovering surge arrester operation status monitoring system, characterized in that, include: The data acquisition and decomposition module is used to perform Fourier decomposition on the acquired surge arrester leakage current and bus voltage respectively to obtain the fundamental component and third harmonic component corresponding to the leakage current and bus voltage. The operating status determination module is used to compare the fundamental and third harmonic components of the leakage current with a given reference value. Based on the comparison result, the fundamental and third harmonic components of the leakage current are corrected using the fundamental and third harmonic components of the bus voltage and the current ambient temperature. The operating status of the surge arrester is obtained based on the correction result. The operating status determination module includes: The comparison module is used to compare the fundamental component and the third harmonic component of the leakage current with a given reference value for the fundamental component and a given reference value for the third harmonic component, respectively. The fundamental component correction module is used to correct the measured value of the fundamental component of the leakage current when the fundamental component of the leakage current is greater than the given fundamental component reference value, based on the fundamental component of the synchronous bus voltage and the influence of ambient temperature on the leakage current. The third harmonic component correction module is used to correct the measured value of the third harmonic component of the leakage current based on the third harmonic component of the synchronous bus voltage and the ambient temperature when the third harmonic component of the leakage current is greater than the given third harmonic component reference value. The alarm module is used to issue an alarm message if the fundamental component of the leakage current after correction is still greater than the given fundamental component reference value, indicating that the surge arrester is damp inside; and to issue an alarm message if the third harmonic component of the leakage current after correction is still greater than the given third harmonic component reference value, indicating that the surge arrester is severely aging. The correction of the fundamental component of the leakage current, based on the influence of the fundamental component of the synchronous bus voltage and ambient temperature on the leakage current, includes: subtracting the fundamental component of the current bus voltage and the current ambient temperature from the reference values ​​of the fundamental bus voltage and ambient temperature corresponding to the reference values ​​of the fundamental component, respectively, to obtain the first bus voltage influence value and the first temperature influence value; calculating the influence value of the difference between the first bus voltage influence value and the first temperature influence value on the fundamental component of the leakage current; and subtracting the influence value from the measured value of the fundamental component of the leakage current to obtain the correction value of the fundamental component of the leakage current. When correcting the third harmonic component of the leakage current, the following steps are taken: the third harmonic component of the current bus voltage and the current ambient temperature are subtracted from the reference values ​​of the third harmonic voltage of the bus voltage and the ambient temperature corresponding to the reference value of the third harmonic component of the leakage current, respectively, to obtain the second bus voltage influence value and the second temperature influence value; based on the second bus voltage influence value and the second temperature influence value, the influence value of the difference between the two on the third harmonic component of the leakage current is calculated; the measured value of the third harmonic component of the leakage current is subtracted from the influence value to obtain the correction value of the third harmonic component of the leakage current.

5. A processing apparatus, the processing apparatus comprising at least a processor and a memory, the memory storing a computer program, characterized in that, When the processor runs the computer program, it performs the steps of the method for monitoring the operating status of the controllable self-recovering energy dissipation device surge arrester as described in any one of claims 1 to 3.

6. A computer storage medium, characterized in that, It stores computer-readable instructions that can be executed by a processor to implement the steps of the controllable self-recovering energy dissipation device surge arrester operation status monitoring method according to any one of claims 1 to 3.

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