A current equivalent test method and device for a gap type controllable lightning arrester

Abstract

The present invention discloses a method and device for equivalent testing of the current of a gap-type controllable lightning arrester. The method includes: for different overvoltages occurring in the system, measuring or simulating the actual operating current of the lightning arrester; intercepting the current waveform on the operating current of the lightning arrester according to the maximum allowable triggering delay of the gap, and performing equivalent simulation on this section of the current waveform; determining the current amplitude and peak time of this section of the current waveform, and calculating the integral area of this section of the current waveform; based on the current amplitude, peak time and integral area of this section of the current waveform, determining the equivalent current parameters of the sine wave according to the current equivalence principle; and determining the LC circuit parameters for generating the equivalent current according to the equivalent current parameters of the sine wave. The present invention utilizes the working characteristics of the gap triggering circuit under the operating current of the lightning arrester, and has the characteristics of reliable principle, simple method and easy operation, and solves the problems of the triggering source and experimental research of the gap-type controllable lightning arrester under laboratory conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of overvoltage protection research in power systems, and more specifically, to a method and device for current equivalent testing of a gap-type controllable arrester. Background Art

[0002] In ultra-high voltage and extra-high voltage power systems, the use of controllable arrester technology can deeply limit the system switching overvoltage. As Figure 2 shown, a controllable arrester is generally connected to a bus or a line and consists of a fixed part and a controlled part. A control element is connected in parallel to the controlled part of the arrester. When the system is operating normally, the control element is in an open state, and both the fixed and controlled parts of the arrester are put into operation to jointly bear the system operating voltage; when a switching overvoltage occurs in the system, the control element conducts quickly, and the controlled part of the arrester is short-circuited, thereby dynamically changing the volt-ampere characteristic of the arrester and playing a role in reducing the residual voltage and deeply limiting the switching overvoltage.

[0003] For applications in AC systems, a principle of a gap-type controllable arrester is specifically proposed with a gap as the control element. The gap is a forced-trigger type gap, and trigger circuits are respectively arranged at its high potential end and ground potential end. The trigger circuit consists of components such as a trigger coil, a coaxial cable, and an ignition gap. In actual system applications, the trigger circuit uses the arrester operating current i as a trigger source to excite the trigger coil to generate a trigger voltage. The voltage is led to the ignition gap by the coaxial cable and causes the ignition gap to break down to generate an initial discharge plasma. After the plasma is injected into the gap, the gap is finally forced to trigger and conduct under the action of the electric field.

[0004] However, for the above-mentioned gap-type controllable arrester, under laboratory conditions, due to the limited capacity of the test power supply and the difficulty in simulating the arrester operating current under different overvoltages, it is urgently necessary to propose a current equivalent test method to solve the problems of the gap trigger source current and conducting experimental research on the gap-type controllable arrester. Summary of the Invention

[0005] In view of the technical problem in the prior art that the problems of the gap trigger source current and conducting experimental research on the gap-type controllable arrester cannot be solved, the present invention provides a method and device for current equivalent testing of a gap-type controllable arrester.

[0006] According to one aspect of the present invention, there is provided a method for current equivalent testing of a gap-type controllable arrester, including:

[0007] For different overvoltages occurring in the system, actually measure or simulate to obtain the actual arrester operating current;

[0008] According to the maximum allowable trigger delay of the gap, intercept the current waveform on the arrester operating current, and perform equivalent simulation on this section of the current waveform;

[0009] Determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform;

[0010] Based on the current amplitude, peak time and integral area of this section of the current waveform, determine the sine-wave equivalent current parameters according to the current equivalence principle;

[0011] Determine the LC circuit parameters for generating the equivalent current according to the sine-wave equivalent current parameters.

[0012] Optionally, intercept the current waveform on the arrester operating current according to the maximum allowable trigger delay of the gap, and perform equivalent simulation on this section of the current waveform, including:

[0013] Determine the maximum allowable trigger delay time of the gap;

[0014] Intercept the current waveform from zero to the maximum allowable trigger delay time of the gap on the arrester operating current.

[0015] Optionally, determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform, including:

[0016] Determine the current at the maximum allowable trigger delay time point of this section of the current waveform as the current amplitude of this section of the current waveform;

[0017] Determine the maximum allowable trigger delay time of this section of the current waveform as the peak time of this section of the current waveform;

[0018] Calculate the integral area of this section of the current waveform according to the trend, current amplitude and peak time of this section of the current waveform.

[0019] Optionally, based on the current amplitude, peak time and integral area of this section of the current waveform, determine the sine-wave equivalent current parameters according to the current equivalence principle, including:

[0020] Determine the peak time T s of this section of the current waveform as the peak time T s(e) of the sine-wave equivalent current;

[0021] Based on the current amplitude I s , peak time T s and integral area A is of this section of the current waveform, use the following formula to calculate the current peak I s(e) of the sine-wave equivalent current: I s(e) =(π*A is ) / (2*T s ).

[0022] Optionally, according to the sine-wave equivalent current parameters, determine the LC circuit parameters for generating the equivalent current, including:

[0023] According to the sine-wave equivalent current parameter T s(e) and I s(e) , use the following formula to calculate the capacitance C and inductance L of the LC circuit for generating the equivalent current:

[0024]

[0025]

[0026] In the formula, U c is the pre-charge voltage of the capacitance C, T s(e) is the peak time of the sine-wave equivalent current, and I s(e) is the current peak of the sine-wave equivalent current.

[0027] According to another aspect of the present invention, there is provided a gap-type controllable lightning arrester current equivalent test device, including:

[0028] A lightning arrester operating current acquisition module, configured to measure or simulate the actual lightning arrester operating current for different overvoltages that occur in the system;

[0029] A current waveform intercepting module, configured to intercept a current waveform on the lightning arrester operating current according to the maximum allowable trigger delay of the gap, and perform equivalent simulation on this section of the current waveform;

[0030] A current waveform parameter determination module, configured to determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform;

[0031] A sine-wave equivalent current parameter determination module, configured to determine the sine-wave equivalent current parameters based on the current amplitude, peak time, and integral area of this section of the current waveform according to the current equivalent principle;

[0032] An LC circuit parameter determination module, configured to determine the LC circuit parameters for generating the equivalent current according to the sine-wave equivalent current parameters.

[0033] Optionally, the current waveform intercepting module is specifically configured to:

[0034] Determine the maximum allowable trigger delay time of the gap;

[0035] Intercept the current waveform from zero to the maximum allowable trigger delay time of the gap on the lightning arrester operating current.

[0036] Optionally, the current waveform parameter determination module is specifically configured to:

[0037] Determine the current at the maximum allowable trigger delay time point of the current waveform of this segment as the current amplitude of the current waveform of this segment;

[0038] Determine the maximum allowable trigger delay time of the current waveform of this segment as the peak time of the current waveform of this segment;

[0039] Calculate the integral area of the current waveform of this segment according to the trend, current amplitude and peak time of the current waveform of this segment.

[0040] Optionally, the sine wave equivalent current parameter determination module is specifically configured to:

[0041] Determine the peak time T s of the current waveform of this segment as the peak time T s(e) of the sine wave equivalent current;

[0042] Based on the current amplitude I s , peak time T s and integral area A is of the current waveform of this segment, use the following formula to calculate the current peak I s(e) of the sine wave equivalent current: I s(e) =(π * A is ) / (2 * T s ).

[0043] Optionally, the LC circuit parameter determination module is specifically configured to:

[0044] According to the sine wave equivalent current parameters T s(e) and I s(e) , use the following formula to calculate the capacitance C and inductance L of the LC circuit that generates the equivalent current:

[0045]

[0046]

[0047] In the formula, U c is the pre-charge voltage of the capacitance C, T s(e) is the peak time of the sine wave equivalent current, and I s(e) is the current peak of the sine wave equivalent current.

[0048] According to another aspect of the present invention, there is provided a computer-readable storage medium, and the storage medium stores a computer program, and the computer program is used to execute the method described in any one of the above aspects of the present invention.

[0049] According to another aspect of the present invention, there is provided an electronic device, which includes: a processor; a memory for storing executable instructions executable by the processor; and the processor for reading the executable instructions from the memory and executing the instructions to implement the method according to any one of the above aspects of the present invention.

[0050] Thus, according to the basic circuit principle that the capacitance voltage is determined by the integration of its current, and in accordance with the principle that the integration areas of the equivalent current and the actual current with respect to time are equal and the durations are equal, a sine-wave current is generated as the equivalent current by using an equivalent current generation circuit under laboratory conditions. By utilizing the operating characteristics of the gap trigger circuit under the lightning arrester operating current, the present invention has the characteristics of reliable principle, simple method, and easy operation, and solves the problems of the trigger source and experimental research of the gap-type controllable lightning arrester under laboratory conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The exemplary embodiments of the present invention can be more fully understood by referring to the following drawings:

[0052] Figure 1 is a flowchart of a method for current equivalence test of a gap-type controllable lightning arrester provided by an exemplary embodiment of the present invention;

[0053] Figure 2 is a schematic diagram of the principle of a controllable lightning arrester provided by an exemplary embodiment of the present invention;

[0054] Figure 3 is a diagram of a gap-type controllable lightning arrester using the current equivalence test method provided by an exemplary embodiment of the present invention;

[0055] Figure 4 is an equivalent current generation circuit provided by an exemplary embodiment of the present invention;

[0056] Figure 5 is an effect diagram of a specific application embodiment of a method for current equivalence test of a gap-type controllable lightning arrester provided by an exemplary embodiment of the present invention;

[0057] Figure 6 is a schematic structural diagram of a device for current equivalence test of a gap-type controllable lightning arrester provided by an exemplary embodiment of the present invention;

[0058] Figure 7 is the structure of an electronic device provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments of the present invention. It should be understood that the present invention is not limited by the exemplary embodiments described herein.

[0060] It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0061] Those skilled in the art can understand that terms such as "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, etc., and neither represent any specific technical meaning nor indicate an inevitable logical order between them.

[0062] It should also be understood that in the embodiments of the present invention, "a plurality of" may refer to two or more, and "at least one" may refer to one, two, or more.

[0063] It should also be understood that for any component, data, or structure mentioned in the embodiments of the present invention, in the absence of a clear limitation or a contrary indication in the context, it can generally be understood as one or more.

[0064] In addition, the term "and / or" in the present invention is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the associated objects before and after.

[0065] It should also be understood that the description of each embodiment of the present invention emphasizes the differences between the embodiments, and their similarities or similarities can be referred to each other. For the sake of brevity, they will not be elaborated one by one.

[0066] At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships.

[0067] The following description of at least one exemplary embodiment is actually merely illustrative and in no way limits the present invention or its application or use.

[0068] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0069] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0070] Embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate together with many other general or special computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments, and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, servers, etc. include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputer systems, mainframe computer systems, and distributed cloud computing technology environments including any of the above systems, and so on.

[0071] Terminal devices, computer systems, servers and other electronic devices can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Generally, program modules can include routines, programs, object programs, components, logics, data structures, etc., which perform specific tasks or implement specific abstract data types. The computer system / server can be implemented in a distributed cloud computing environment, where tasks are executed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media including storage devices.

[0072] Exemplary method

[0073] Figure 1 It is a schematic flow chart of a current equivalent test method for a gap-type controllable lightning arrester provided by an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as Figure 1 As shown, the current equivalent test method 100 for a gap-type controllable lightning arrester includes the following steps:

[0074] Step 101, for different overvoltages that occur in the system, measure or simulate the actual lightning arrester operating current.

[0075] Step 102, according to the maximum allowable trigger delay of the gap, intercept the current waveform on the lightning arrester operating current, and perform equivalent simulation on this section of the current waveform.

[0076] Optionally, according to the maximum allowable trigger delay of the gap, intercept the current waveform on the lightning arrester operating current, and perform equivalent simulation on this section of the current waveform, including: determining the maximum allowable trigger delay time of the gap; intercepting the current waveform from zero to the maximum allowable trigger delay time of the gap on the lightning arrester operating current.

[0077] Step 103, determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform.

[0078] Optionally, determine the current amplitude and peak time of the current waveform of this segment, and calculate the integral area of the current waveform of this segment, including: determining the current at the maximum allowable trigger delay time point of the gap of the current waveform of this segment as the current amplitude of the current waveform of this segment; determining the maximum allowable trigger delay time of the gap of the current waveform of this segment as the peak time of the current waveform of this segment; calculating the integral area of the current waveform of this segment according to the trend, current amplitude and peak time of the current waveform of this segment.

[0079] Step 104, based on the current amplitude, peak time and integral area of the current waveform of this segment, determine the sine wave equivalent current parameters according to the current equivalence principle;

[0080] Optionally, based on the current amplitude, peak time and integral area of the current waveform of this segment, determine the sine wave equivalent current parameters according to the current equivalence principle, including: determining the peak time T s of the current waveform of this segment as the peak time T s(e) of the sine wave equivalent current; based on the current amplitude I s , peak time T s and integral area A is of the current waveform of this segment, use the following formula to calculate the current peak I s(e) of the sine wave equivalent current: I s(e) =(π*A is ) / (2*T s ).

[0081] Step 105, determine the LC circuit parameters for generating the equivalent current according to the sine wave equivalent current parameters.

[0082] Optionally, according to the sine wave equivalent current parameters, determine the LC circuit parameters for generating the equivalent current, including: according to the sine wave equivalent current parameters T s(e) and I s(e) , use the following formula to calculate the capacitance C and inductance L of the LC circuit for generating the equivalent current:

[0083]

[0084]

[0085] In the formula, U c is the pre-charging voltage of the capacitance C, T s(e) is the peak time of the sine wave equivalent current, and I s(e) is the current peak of the sine wave equivalent current.

[0086] In the embodiments of the present invention, in combination with Figure 2 , Figure 3 and Figure 4As shown, the gap trigger circuit consists of components such as a trigger coil, a coaxial cable, and an ignition gap. Under the excitation of the arrester operating current, it exhibits a significant capacitive effect, which is equivalent to a capacitor charged by a current source. According to the basic circuit principle that the capacitor voltage is determined by the integration of its current, the current equivalence principle proposed in the present invention is: following the principle that the integration areas and durations of the equivalent current and the actual current with respect to time are equal, a Figure 4 circuit shown is used under laboratory conditions to generate a sine-wave current as the equivalent current.

[0087] The current equivalence method proposed in the present invention specifically includes the following steps:

[0088] (1) For different overvoltages that occur in the system, measure or simulate the actual arrester operating current i = f(t);

[0089] (2) According to the maximum allowable trigger delay t d of the gap, intercept the current waveform i s on i = f(t), that is, i s = f(t) (0 ≤ t ≤ t d ), and perform equivalent simulation on this section of the current waveform i s .

[0090] (3) According to the current waveform i s , obtain its current amplitude I s and peak time T s (T s = t d ), and calculate its integration area A is .

[0091] (4) According to the current equivalence principle, determine the parameters of the sine-wave equivalent current i s(e) :

[0092] 1) The peak time T s(e) is: T s(e) = T s ;

[0093] 2) The current peak I s(e) is: I s(e) = (π * A is ) / (2 * T s ).

[0094] (5) According to the parameters of the equivalent current i s(e) , determine the Figure 4 LC circuit parameters for generating the equivalent current i s(e) , where U c is the pre-charge voltage of the capacitor C:

[0095] 1) The capacitor C is:

[0096] 2) The inductance L is as follows:

[0097] The following combines the attached Figure 5 to give the best embodiment of a specific application of the present invention.

[0098] (1) For the 250 / 2500 us standard operating overvoltage, the actual arrester operating current i = f(t) is obtained, as Figure 5 shown by curve ① in the figure;

[0099] (2) Take the maximum allowable trigger delay time t d = 80 us, and intercept the current waveform i s = f(t) (0 ≤ t ≤ t d ) on i = f(t), as Figure 5 shown by curve ② in the figure;

[0100] (3) According to the current i s , its current amplitude I s = 125 A and peak time T s = 80 us are obtained, and its integral area A is = 2780.8 (A·us) is calculated;

[0101] (4) According to the equivalent principle, the parameters of the sine-wave equivalent current i s(e) are determined, and the equivalent current waveform is as Figure 5 shown by curve ③ in the figure:

[0102] 1) The peak time T s(e) is: T s(e) = 80 us;

[0103] 2) The current peak I s(e) is: I s(e) = 58.6 A.

[0104] (5) According to the parameters of the equivalent current i s(e) , the LC circuit parameters for generating the equivalent current i Figure 4 shown in the figure are determined, where the capacitor pre-charge voltage U s(e) is taken as 400 V: c 1) The capacitor C is: C = 298 uF;

[0105] 2) The inductance L is: L = 8.7 uH.

[0106] 2) The inductance L is: L = 8.7 uH.

[0107] Therefore, according to the basic circuit principle that the capacitor voltage is determined by the integration of its current, and in accordance with the principle that the integration areas and durations of the equivalent current and the actual current with respect to time are equal, a sine-wave current is generated as the equivalent current by using an equivalent current generation circuit under laboratory conditions. By utilizing the working characteristics of the gap trigger circuit under the arrester operating current, the present invention has the characteristics of reliable principle, simple method and easy operation, and solves the problems of the trigger source and experimental research of the gap-type controllable arrester under laboratory conditions.

[0108] Exemplary device

[0109] Figure 6 FIG. 6 is a schematic structural diagram of a current equivalent test device for a gap-type controllable arrester provided by an exemplary embodiment of the present invention. As Figure 6 shown, the device 600 includes:

[0110] An arrester operating current acquisition module 610, configured to measure or simulate the actual arrester operating current for different overvoltages occurring in the system;

[0111] A current waveform intercepting module 620, configured to intercept a current waveform on the arrester operating current according to the maximum allowable trigger delay of the gap, and perform equivalent simulation on this section of the current waveform;

[0112] A current waveform parameter determination module 630, configured to determine the current amplitude and peak time of this section of the current waveform, and calculate the integration area of this section of the current waveform;

[0113] A sine-wave equivalent current parameter determination module 640, configured to determine the sine-wave equivalent current parameters based on the current amplitude, peak time and integration area of this section of the current waveform according to the current equivalent principle;

[0114] An LC circuit parameter determination module 650, configured to determine the LC circuit parameters for generating the equivalent current according to the sine-wave equivalent current parameters.

[0115] Optionally, the current waveform intercepting module 620 is specifically configured to:

[0116] Determine the maximum allowable trigger delay time of the gap;

[0117] Intercept the current waveform from zero to the maximum allowable trigger delay time of the gap on the arrester operating current.

[0118] Optionally, the current waveform parameter determination module 630 is specifically configured to:

[0119] Determine the current amplitude of this section of the current waveform as the current at the maximum allowable trigger delay time point of the gap;

[0120] Determine the maximum allowable trigger delay time of the gap of this section of the current waveform as the peak time of this section of the current waveform;

[0121] Calculate the integral area of this section of the current waveform according to the trend, current amplitude and peak time of this section of the current waveform.

[0122] Optionally, the sine-wave equivalent current parameter determination module 640 is specifically configured to:

[0123] Determine the peak time T of this section of the current waveform s as the peak time T of the sine-wave equivalent current s(e) ;

[0124] Based on the current amplitude I of this section of the current waveform s , peak time T s and integral area A is , use the following formula to calculate the current peak I of the sine-wave equivalent current s(e) : I s(e) =(π*A is ) / (2*T s ).

[0125] Optionally, the LC circuit parameter determination module 650 is specifically configured to:

[0126] According to the sine-wave equivalent current parameters T s(e) and I s(e) , use the following formula to calculate the capacitance C and inductance L of the LC circuit that generates the equivalent current:

[0127]

[0128]

[0129] In the formula, U c is the pre-charge voltage of the capacitance C, T s(e) is the peak time of the sine-wave equivalent current, and I s(e) is the current peak of the sine-wave equivalent current.

[0130] The gap-type controllable lightning arrester current equivalent test device 600 in the embodiment of the present invention corresponds to the gap-type controllable lightning arrester current equivalent test method 100 in another embodiment of the present invention, which will not be elaborated here.

[0131] Exemplary electronic device

[0132] Figure 7It is the structure of an electronic device provided by an exemplary embodiment of the present invention. The electronic device can be either the first device or the second device, or both, or a stand-alone device independent of them. The stand-alone device can communicate with the first device and the second device to receive the input signals collected from them. Figure 7 The block diagram of an electronic device according to an embodiment of the present invention is illustrated. As Figure 7 shown, the electronic device 70 includes one or more processors 71 and a memory 72.

[0133] The processor 71 can be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and can control other components in the electronic device to perform desired functions.

[0134] The memory 72 can include one or more computer program products, and the computer program products can include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory can include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions can be stored on the computer-readable storage media, and the processor 71 can run the program instructions to implement the method of information mining for historical change records of the software programs of various embodiments of the present invention described above and / or other desired functions. In one example, the electronic device can further include: an input system 73 and an output system 74, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown).

[0135] In addition, the input system 73 can further include, for example, a keyboard, a mouse, and so on.

[0136] The output system 74 can output various information to the outside. The output device 74 can include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, and so on.

[0137] Of course, for simplicity, Figure 7 only some of the components related to the present invention in the electronic device are shown in, and components such as buses, input / output interfaces, etc. are omitted. In addition, according to specific application scenarios, the electronic device can further include any other appropriate components.

[0138] Exemplary computer program product and computer-readable storage medium

[0139] In addition to the above methods and devices, embodiments of the present invention may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the method of information mining on historical change records according to various embodiments of the present invention described in the "Exemplary Method" section above of this specification.

[0140] The computer program product can be written in any combination of one or more programming languages for the program code to perform the operations of the embodiments of the present invention. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, executed as an independent software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0141] Furthermore, embodiments of the present invention may also be computer-readable storage media, on which computer program instructions are stored, and the computer program instructions, when executed by a processor, cause the processor to perform the steps in the method of information mining on historical change records according to various embodiments of the present invention described in the "Exemplary Method" section above of this specification.

[0142] The computer-readable storage media may adopt any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may, for example, include but not be limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination of the above. More specific examples (non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0143] The basic principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present invention. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations. The above details do not limit the present invention to necessarily adopt the above specific details to implement.

[0144] In the description of the present specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system embodiments, since they basically correspond to the method embodiments, the description is relatively simple. For the relevant parts, reference can be made to the corresponding parts of the method embodiments.

[0145] The block diagrams of the devices, systems, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, systems, equipment, and systems can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein refer to the word "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

[0146] The methods and systems of the present invention can be implemented in many ways. For example, the methods and systems of the present invention can be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of the steps for the method is only for illustration, and the steps of the method of the present invention are not limited to the specific order described above, unless otherwise specifically stated. In addition, in some embodiments, the present invention can also be implemented as a program recorded on a recording medium, and these programs include machine-readable instructions for implementing the method according to the present invention. Therefore, the present invention also covers the recording medium storing the program for executing the method according to the present invention.

[0147] It should also be noted that in the systems, equipment, and methods of the present invention, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0148] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A current equivalent test method for a gap-type controllable lightning arrester, characterized in that, Including: For different overvoltages occurring in the system, the actual lightning arrester operating current is measured or simulated; According to the maximum allowable trigger delay of the gap, the current waveform is intercepted from the lightning arrester operating current, and the equivalent simulation of this section of the current waveform is carried out; According to the maximum allowable trigger delay of the gap, the current waveform is intercepted from the lightning arrester operating current, and the equivalent simulation of this section of the current waveform is carried out, including: Determine the maximum allowable trigger delay time of the gap; Intercept the current waveform from zero to the maximum allowable trigger delay time of the gap on the lightning arrester operating current; Determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform; Determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform, including: Determine the current at the maximum allowable trigger delay time point of this section of the current waveform as the current amplitude of this section of the current waveform; Determine the maximum allowable trigger delay time of this section of the current waveform as the peak time of this section of the current waveform; Calculate the integral area of this section of the current waveform according to the trend, current amplitude and peak time of this section of the current waveform; Based on the current amplitude, peak time and integral area of this section of the current waveform, according to the current equivalent principle, determine the sine wave equivalent current parameters; Based on the current amplitude, peak time and integral area of this section of the current waveform, according to the current equivalent principle, determine the sine wave equivalent current parameters, including: Set the peak time T of this section of the current waveform s as the peak time T of the sine wave equivalent current s(e) ; The current amplitude I based on this segment of current waveform s , the peak time T s and the integral area A is , use the following formula to calculate the current peak I of the sine wave equivalent current s(e) : I s(e) = (π * A is ) / (2 * T s ); According to the sine wave equivalent current parameters, determine the LC circuit parameters for generating the equivalent current.

2. A current equivalent test device for a gap-type controllable lightning arrester, characterized in that Including: A lightning arrester operating current acquisition module, which is used to measure or simulate the actual lightning arrester operating current for different overvoltages occurring in the system; A current waveform interception module, which is used to intercept the current waveform from the lightning arrester operating current according to the maximum allowable trigger delay of the gap, and carry out equivalent simulation on this section of the current waveform; The current waveform interception module is specifically used for: determining the maximum allowable trigger delay time of the gap; intercepting the current waveform from zero to the maximum allowable trigger delay time of the gap on the lightning arrester operating current; A current waveform parameter determination module, which is used to determine the current amplitude and peak time of this section of the current waveform, and calculate the integral area of this section of the current waveform; The current waveform parameter determination module is specifically used for: determining the current at the maximum allowable trigger delay time point of this section of the current waveform as the current amplitude of this section of the current waveform; determining the maximum allowable trigger delay time of this section of the current waveform as the peak time of this section of the current waveform; calculating the integral area of this section of the current waveform according to the trend, current amplitude and peak time of this section of the current waveform; A sine-wave equivalent current parameter determination module, which is used to determine the sine-wave equivalent current parameters based on the current amplitude, peak time, and integral area of this section of the current waveform according to the current equivalence principle; specifically, the sine-wave equivalent current parameter determination module is used to: set the peak time T of this section of the current waveform s as the peak time T of the sine-wave equivalent current s(e) ; based on the current amplitude I of this section of the current waveform s , peak time T s , and integral area A is , use the following formula to calculate the current peak I of the sine-wave equivalent current s(e) : I s(e) = (π * A is ) / (2 * T s ); An LC circuit parameter determination module, which is used to determine the LC circuit parameters that generate the equivalent current according to the sine-wave equivalent current parameters.

3. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is used to execute the method described in claim 1 above.

4. An electronic device, characterized in that, The electronic device includes: A processor; A memory for storing executable instructions of the processor; The processor is used to read the executable instructions from the memory and execute the instructions to implement the method described in claim 1 above.

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