A method for determining the switching impulse discharge voltage of the ball-plate long gap

Abstract

The present invention relates to a method for determining the impulse discharge voltage during a ball-plate gap operation. The method comprises: obtaining an estimated voltage value; adjusting the estimated voltage value and applying it to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment satisfies a first preset condition, thereby obtaining a first voltage value; determining the effective number of electrons based on waveform parameters and the first voltage value, wherein the waveform parameters are parameters of the voltage waveform formed by applying the ball-plate gap model and are determined based on the first voltage value; and adjusting the first voltage value until the effective number of electrons satisfies a second preset condition, thereby determining the impulse discharge voltage during the ball-plate gap operation. Based on the physical process of corona initiation and taking into account spatial photoionization, the present invention efficiently and quickly determines the impulse discharge voltage during a ball-plate gap operation, reduces the number of testers, and provides a basis for refined external insulation design.

Description

Technical Field

[0001] The present invention relates to the field of high voltage and insulation technology, and in particular to a method for determining a ball-plate long gap operating impulse discharge voltage. Background Art

[0002] Ultra-high voltage (UHV) boasts the combined advantages of long distances, large capacity, low losses, and minimal footprint. It is a strategic technology for advancing power technology and ensuring a secure, economical, and environmentally friendly energy supply. For UHV transmission and transformation systems, air gaps are the primary form of external insulation for ultra-UHV transmission lines. The discharge characteristics of long air gaps under positive polarity operating impulses are a key factor in external insulation design. The rationality of this external insulation design directly impacts the economic and safety of transmission and transformation project design.

[0003] UHV transmission and transformation systems are plagued by numerous structures similar to ball-plate gaps. These include the gap formed by the shielding ball and surrounding grounding elements in the valve hall of a UHV converter station, and the air gap between workers or helicopters and the tower during live working on UHV transmission lines. Currently, external insulation design primarily relies on full-scale testing to determine the switching impulse discharge characteristics of these gaps, which is difficult and costly. Therefore, an efficient and accurate method for determining the switching impulse discharge voltage across the ball-plate gap is urgently needed to address this issue. Summary of the Invention

[0004] In view of this, it is necessary to provide a method for determining the ball-plate long gap switching impulse discharge voltage to overcome the problems of large workload and high cost in obtaining switching impulse discharge characteristics in the prior art.

[0005] In order to solve the above technical problems, the present invention provides a method for determining the ball-plate long gap operating impulse discharge voltage, comprising:

[0006] Get the estimated voltage value;

[0007] Adjusting the estimated voltage value and applying it to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment meets a first preset condition, thereby obtaining a first voltage value;

[0008] determining the effective electron quantity based on waveform parameters and the first voltage value, wherein the waveform parameters are parameters of a voltage waveform applied to the ball-plate gap model and are determined based on the first voltage value;

[0009] The first voltage value is adjusted again until the effective electron quantity meets a second preset condition, and the impulse discharge voltage of the ball-plate long gap operation is determined.

[0010] Further, the estimated voltage value is adjusted and applied to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment satisfies a first preset condition to obtain a first voltage value, including:

[0011] applying the estimated voltage value to the high voltage electrode, and determining a first total number of electrons in an initial electron avalanche portion and a second total number of electrons in a secondary electron avalanche portion;

[0012] Determining whether the first total number of electrons and the second total number of electrons meet the first preset condition;

[0013] If not, the estimated voltage value is increased until the first preset condition is met, and the first voltage value finally generated after adjusting the estimated voltage value is recorded.

[0014] Furthermore, applying the estimated voltage value to the high voltage electrode and determining a first total number of electrons in an initial electron avalanche portion and a second total number of electrons in a secondary electron avalanche portion include:

[0015] determining the first total number of electrons in the initial electron avalanche head according to a first electric field strength function and a second electric field strength function about a boundary of the first ionization region;

[0016] The second total number of electrons in the secondary electron avalanche head is determined based on the area factor function, the first probability of generating photons by impact ionization, the second probability of generating electrons by absorption of photons, the first electric field strength function, and the second electric field strength function, wherein the area factor function is a function about the boundary of the second ionization zone, and is used to calculate the area of ​​electrons that are not absorbed and disappear in the ionization zone formed at the boundary of the second ionization zone.

[0017] Furthermore, the process of determining the area factor function is as follows:

[0018] Determine the radial component of the area factor based on the photon radiation distance, geometric parameters of multiple ionization zones, and photon absorption coefficient under standard meteorological conditions;

[0019] The area factor function is determined according to the square of the radial component of the area factor.

[0020] Furthermore, the first preset condition includes: the first total number of electrons is equal to the second total number of electrons.

[0021] Furthermore, determining the effective electron quantity according to the input waveform parameters and the first voltage value finally generated after adjusting the estimated voltage value includes:

[0022] The effective electron quantity is determined by integrating the first moment corresponding to the first voltage value.

[0023] Furthermore, the step of adjusting the first voltage value again until the effective electron quantity satisfies a second preset condition and determining the impulse discharge voltage of the ball-plate long gap operation includes:

[0024] Determining whether the effective electron quantity meets the second preset condition;

[0025] If not, the estimated voltage value is increased until the second preset condition is met, and the impulse discharge voltage of the ball-plate long gap operation is determined.

[0026] Furthermore, the determining of the impulse discharge voltage of the ball-plate long gap operation includes:

[0027] Determining the corona inception voltage according to a second voltage value ultimately generated after adjusting the first voltage value;

[0028] determining a gap leader channel pressure drop according to the corona starting voltage, gap distance, and streamer channel field strength;

[0029] Determining a minimum breakdown voltage based on the corona inception voltage and the gap pilot channel voltage drop;

[0030] The impulse discharge voltage of the ball-plate long gap operation is determined based on the minimum breakdown voltage and the discharge voltage standard deviation.

[0031] Furthermore, the second preset condition includes: the number of effective electrons is equal to a preset effective value.

[0032] The present invention also provides a device for determining a ball-plate long gap operation impulse discharge voltage, comprising:

[0033] An acquisition unit, used for acquiring an estimated voltage value;

[0034] an adjustment unit for adjusting the estimated voltage value and applying it to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment satisfies a first preset condition; and for determining the effective number of electrons based on input waveform parameters and a first voltage value ultimately generated after adjusting the estimated voltage value;

[0035] The calculation unit is used to adjust the first voltage value again until the number of effective electrons meets a second preset condition, and determine the impulse discharge voltage of the ball-plate long gap operation.

[0036] Compared with the prior art, the beneficial effects of the present invention include: first, effectively obtaining the estimated voltage value; then, applying the estimated voltage value to the high-voltage electrode to induce an electron avalanche, determining the total number of electrons at the boundary of the ionization zone, and continuously adjusting the estimated voltage value according to the total number of electrons to achieve the expected condition, i.e., the first preset condition; then, considering the spatial photoionization effect, further increasing the voltage of the high-voltage electrode to calculate the effective number of effective free electrons; finally, when the effective number of electrons reaches the expected condition, i.e., the second preset condition, the impact discharge voltage of the ball-plate long gap operation is further calculated. In summary, the present invention is based on the physical process of corona initiation, considering the spatial photoionization effect, and efficiently and quickly determines the impact discharge voltage of the fixed ball-plate long gap operation, reducing the number of test workers, and at the same time providing a basis for the refined design of external insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A flow chart illustrating an embodiment of a method for determining a ball-plate long gap operating impulse discharge voltage provided by the present invention;

[0038] Figure 2 The present invention provides Figure 1 A flow chart of an embodiment of step S102;

[0039] Figure 3 The present invention provides Figure 2 Flow chart of step S201 in an embodiment;

[0040] Figure 4 The present invention provides Figure 3 A schematic flow chart of an embodiment of the area factor function calculation process in step S302;

[0041] Figure 5 A geometric diagram of an embodiment of the area factor provided by the present invention;

[0042] Figure 6 The present invention provides Figure 1 A flow chart of an embodiment of step S104;

[0043] Figure 7 The present invention provides Figure 6 A flow chart illustrating an embodiment of determining the impulse discharge voltage of the ball-plate long gap operation in step S602;

[0044] Figure 8 A schematic structural diagram of an embodiment of a device for determining a ball-plate long gap operation impulse discharge voltage provided by the present invention;

[0045] Figure 9 This is a structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0047] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. Furthermore, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In the description of the present invention, reference to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the described embodiment may be combined with other embodiments.

[0049] The present invention provides a method for determining the operating impulse discharge voltage of a ball-plate long gap. Based on the physical process of corona initiation and taking into account the spatial photoionization effect, the operating impulse discharge voltage of the ball-plate long gap is effectively calculated, providing a new idea for further effectively reducing the experimental cost of obtaining operating impulse discharge characteristics.

[0050] Before describing the embodiments, the following definitions are given for the relevant terms involved:

[0051] Ball-to-plate gap: An air gap with a slightly nonuniform electric field formed by metal spherical electrodes. It is primarily used to measure high voltage peaks but can also serve as a protective gap. Examples include the gap formed by the shielding sphere and the surrounding grounding body in the valve hall of a UHV converter station, and the gap between workers or helicopters and the tower during live working on UHV transmission lines.

[0052] Based on the description of the above technical terms, the existing technology often requires a large number of difficult experiments to obtain the switching impulse discharge characteristics of the gap, which is difficult and costly. Therefore, the present invention aims to propose a simple and efficient method for determining the switching impulse discharge voltage of the ball-plate long gap.

[0053] The specific embodiments are described in detail below:

[0054] The embodiment of the present invention provides a method for determining the ball-plate long gap operation impulse discharge voltage, combined with Figure 1 Come and see, Figure 1This is a flow chart of an embodiment of a method for determining a ball-plate long gap operating impulse discharge voltage provided by the present invention. The method includes steps S101 to S104, wherein:

[0055] In step S101, an estimated voltage value is obtained;

[0056] In step S102, the estimated voltage value is adjusted and applied to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment meets a first preset condition, thereby obtaining a first voltage value;

[0057] In step S103, the effective electron quantity is determined based on waveform parameters and the first voltage value, wherein the waveform parameters are parameters of the voltage waveform applied to the ball-plate gap model and are determined based on the first voltage value;

[0058] In step S104, the first voltage value is adjusted again until the effective electron quantity meets a second preset condition, and the impulse discharge voltage of the ball-plate long gap operation is determined.

[0059] In an embodiment of the present invention, first, an estimated voltage value is effectively obtained; then, the estimated voltage value is applied to the high-voltage electrode to induce an electron avalanche, determine the total number of electrons at the boundary of the ionization zone, and continuously adjust the estimated voltage value based on the total number of electrons to achieve the expected condition, i.e., the first preset condition; then, considering the indirect photoionization effect, the voltage of the high-voltage electrode is further increased to calculate the effective number of effective free electrons; finally, when the effective number of electrons reaches the expected condition, i.e., the second preset condition, the impact discharge voltage of the ball-plate long gap operation is further calculated.

[0060] As a preferred embodiment, Figure 2 Come and see, Figure 2 The present invention provides Figure 1 The flowchart of an embodiment of step S102 is shown in FIG. 1 , wherein step S102 includes steps S201 to S203, wherein:

[0061] In step S201, the estimated voltage value is applied to the high voltage electrode, and a first total number of electrons in an initial electron avalanche portion and a second total number of electrons in a secondary electron avalanche portion are determined;

[0062] In step S202, it is determined whether the first total number of electrons and the second total number of electrons meet the first preset condition;

[0063] In step S203 , if the condition is not satisfied, the estimated voltage value is increased until the first preset condition is satisfied, and the first voltage value finally generated after adjusting the estimated voltage value is recorded.

[0064] In an embodiment of the present invention, based on the physical process of corona initiation and taking into account spatial photoionization, the estimated voltage value is adjusted using the first total number of electrons and the second total number of electrons.

[0065] As a preferred embodiment, Figure 3 Come and see, Figure 3 The present invention provides Figure 2 The flowchart of step S201 in an embodiment is as follows, wherein step S201 includes steps S301 to S302, wherein:

[0066] In step S301, the total number of the first electrons in the initial electron avalanche head is determined according to a first electric field strength function and a second electric field strength function about a boundary of a first ionization region;

[0067] In step S302, the second total number of electrons in the secondary electron avalanche head is determined based on the area factor function of the electrons that disappear without being absorbed in the ionization region about the boundary of the second ionization region, the first probability of photons being generated by impact ionization, the second probability of photons being absorbed to generate electrons, the first electric field strength function and the second electric field strength function.

[0068] In the embodiment of the present invention, the total number of first electrons and the total number of second electrons are effectively calculated by taking into account the spatial photoionization effect.

[0069] As a more specific example, the first total number of electrons is expressed by the following formula:

[0070]

[0071] Among them, an initial value U0 is determined, and this voltage is applied to the high voltage electrode. The electric field near the electrode causes the initial electrons to trigger electron avalanche, and the boundary of the ionization zone is z i , where α and η are functions of the electric field strength, namely the first electric field strength function and the second electric field strength function, respectively.

[0072] As a more specific embodiment, the first electric field strength function and the second electric field strength function have the following expressions with respect to the electric field strength under standard atmospheric conditions:

[0073]

[0074] Here, it is assumed that the electron avalanche head is spherical and its radius is:

[0075]

[0076] Where D e is the electron diffusion coefficient, v e is the electron drift velocity, both are functions of the electric field strength:

[0077]

[0078]

[0079] As a more specific example, the second total number of electrons is expressed by the following formula:

[0080]

[0081] The probability of an electron impact ionization producing a photon during the electron avalanche development is f1, and the probability of a photon being absorbed by the air producing an electron is f2. i The layer is divided into layers in the region z = z1 + r1, with each layer having a thickness of dl, μ being the photon absorption coefficient, and g(l) being the area factor that takes into account the disappearance of some photons that are not absorbed in the ionization region. The values ​​of the various parameters in the formula are: for positive polarity voltage, f1f2 = 10 -3 ; Photon absorption coefficient μ=6cm under standard meteorological conditions -1 ; The area factor g(l) is expressed as the radial component g rad (l) and the axial component g axi The product of (l) represents the radial component g of the spherical electrode. rad (l) and the axial component g axi (l) Equal.

[0082] As a preferred embodiment, Figure 4 Come and see, Figure 4 The present invention provides Figure 3 The flowchart of an embodiment of the area factor function calculation process in step S302 includes steps S401 to S402, wherein:

[0083] In step S401, the radial component of the area factor is determined according to the photon radiation distance, the geometric parameters of the multiple ionization zones, and the photon absorption coefficient under standard meteorological conditions;

[0084] In step S402, the area factor function is determined according to the square of the radial component of the area factor.

[0085] In the embodiment of the present invention, a variety of parameters are used to effectively calculate the face factor function.

[0086] As a more specific example, Figure 5 Come and see, Figure 5 This is a geometric diagram of an embodiment of the area factor provided by the present invention. The radial component g(l) is calculated as follows:

[0087] λ 2 =(R+1) 2 +R 2 -2R(R+l)cosθ

[0088]

[0089] Where λ is the photon radiation distance, R, l, θ are as follows Figure 1 As shown; the maximum value of the radial component of the area factor is 0.5, so the maximum value of the area factor is 0.25;

[0090] Then the radial component of the area factor can be expressed as:

[0091]

[0092] As a preferred embodiment, the first preset condition includes: the first total number of electrons is equal to the second total number of electrons. In this embodiment of the present invention, the equation ( ) is used to determine whether the first total number of electrons N1 is equal to the second total number of electrons N2. When N1 = N2, the voltage value U0 is recorded. If the first total number of electrons N1 is not equal to the second total number of electrons N2, the voltage ΔU is increased and the above steps are repeated until N1 = N2.

[0093] As a preferred embodiment, the above step S103 specifically includes:

[0094] The effective electron quantity is determined by integrating the first moment corresponding to the first voltage value.

[0095] In an embodiment of the present invention, integration is performed to determine the effective number of electrons.

[0096] As a more specific embodiment, the waveform of the positive polarity operating impulse voltage is expressed by a double exponential function through the following formula:

[0097]

[0098] Where A is the amplitude coefficient, τ2 and τ1 are the time constants of the wave tail and wave front respectively;

[0099] The voltage U of the high-voltage electrode is further increased (U>U0). At the corresponding time t (t>t0), the number of electrons is integrated in the range of t0 to t, 0 to V, and the effective number of free electrons (i.e., the effective number of electrons) is calculated. The effective number of electrons is expressed by the following formula:

[0100]

[0101] As a preferred embodiment, Figure 6 Come and see, Figure 6 The present invention provides Figure 1 The flowchart of an embodiment of step S104 is shown in FIG. 1 , wherein step S104 includes steps S601 to S602, wherein:

[0102] In step S601, it is determined whether the number of valid electrons meets the second preset condition;

[0103] In step S602, if the condition is not satisfied, the estimated voltage value is increased until the second preset condition is satisfied, and the impulse discharge voltage of the ball-plate long gap operation is determined.

[0104] In the embodiment of the present invention, the estimated voltage value is efficiently adjusted according to the effective electron quantity.

[0105] As a preferred embodiment, Figure 7 Come and see, Figure 7 The present invention provides Figure 6 The flowchart of an embodiment of determining the impulse discharge voltage of the ball-plate long gap operation in step S602 includes steps S701 to S704, wherein:

[0106] In step S701, the corona onset voltage is determined according to the second voltage value finally generated after adjusting the first voltage value;

[0107] In step S702, the gap leader channel pressure drop is determined according to the corona starting voltage, the gap distance and the streamer channel field strength;

[0108] In step S703, a minimum breakdown voltage is determined according to the corona inception voltage and the gap pilot channel voltage drop;

[0109] In step S704, the impulse discharge voltage of the ball-plate long gap operation is determined according to the minimum breakdown voltage and the discharge voltage standard deviation.

[0110] In the embodiment of the present invention, the gap pilot channel voltage drop, the minimum breakdown voltage and the impulse discharge voltage are calculated in sequence according to the second voltage value.

[0111] It should be noted that the minimum discharge voltage of a long air gap under the action of a positive polarity operating impulse voltage is composed of the continuous leader inception voltage and the leader channel voltage drop; the radius of the spherical electrode is larger than the critical corona radius, so the continuous leader inception voltage of the spherical electrode is approximately equal to the corona inception voltage.

[0112] As a more specific example, calculate the pressure drop ΔU in the pilot channel of the ball-plate gap l , can be calculated using the following formula:

[0113]

[0114] Where d is the gap distance and Es is the streamer channel field strength, which is generally 400kV / m to 500kV / m.

[0115] Among them, the minimum discharge voltage of the long air gap under the action of positive polarity switching impulse voltage is composed of the continuous leader inception voltage and the leader channel voltage drop. The radius of the spherical electrode is larger than the critical corona radius, so the continuous leader inception voltage of the spherical electrode is approximately equal to the corona inception voltage, and the minimum breakdown voltage U of the gap can be calculated. B , the calculation formula is as follows:

[0116] U B =U ci +ΔU l

[0117] Where, the 50% discharge voltage U of the ball-plate gap under the positive polarity switching impulse voltage is 50 With the minimum breakdown voltage U B Has the following relationship:

[0118]

[0119] Where σ is the standard deviation of the discharge voltage, which is generally 5%.

[0120] As a preferred embodiment, the second preset condition includes: the number of effective electrons is equal to a preset effective value. In the embodiment of the present invention, the effective electron number N is determined. e Is it equal to 1, when the effective number of electrons N e When it is equal to 1, the output corona inception voltage U ci , which is the continuous leading starting voltage of the gap; if it is not equal, continue to increase the voltage ΔU and repeat the above steps until the number of effective electrons N e =1.

[0121] The following is a specific application example to better illustrate the overall technical solution of the present invention:

[0122] The first step is to establish a ball-plate gap model and calculate the axial electric field distribution based on the finite element method. Determine an initial value U0 and apply this voltage to the high voltage electrode. The electric field near the electrode causes the initial electrons to trigger an electron avalanche, and the boundary of the ionization zone is determined as z i , calculate the total number of electrons N1 at the initial electron avalanche head.

[0123] In the second step, after the air molecules absorb photons, the photoelectrons generated by photoionization move toward the high-voltage electrode under the action of the electric field. These photoelectrons collide with the air molecules and ionize to form a secondary electron avalanche, and the total number of electrons N2 in the secondary electron avalanche can be calculated.

[0124] The third step is to determine whether N1 is equal to N2. When N1=N2, record the voltage value U0; if N1 is not equal to N2, increase the voltage ΔU and repeat the above steps until N1=N2.

[0125] The fourth step is to record the time t0 corresponding to U0, and obtain the corresponding input positive polarity operation impulse voltage waveform parameters A, τ1, and τ2 based on the voltage amplitude.

[0126] Step 5: Increase the voltage U (U>U0) on the high voltage electrode and calculate the effective number of free electrons N at the corresponding time t (t>t0). e . Judge N e Is it equal to 1? e When it is equal to 1, the output corona inception voltage U ci If not equal, continue to increase the voltage ΔU and repeat the above steps until N e =1.

[0127] The sixth step is to calculate the pilot channel voltage drop of the ball-plate gap, and then calculate the minimum breakdown voltage U of the ball-plate gap under the action of the positive polarity operating impulse voltage. B With 50% discharge voltage U 50 .

[0128] The embodiment of the present invention also provides a device for determining the ball-plate long gap operation impulse discharge voltage, combined with Figure 8 Come and see, Figure 8 This is a schematic structural diagram of an embodiment of a device for determining a ball-plate length gap operating impulse discharge voltage provided by the present invention. The device 800 for determining a ball-plate length gap operating impulse discharge voltage includes:

[0129] An acquisition unit 801 is used to acquire an estimated voltage value;

[0130] An adjustment unit 802 adjusts the estimated voltage value and applies it to the high-voltage electrode of the ball-plate gap model until the total number of electrons generated after the adjustment meets a first preset condition; and is further configured to determine the effective number of electrons based on the input waveform parameters and a first voltage value ultimately generated after adjusting the estimated voltage value;

[0131] The calculation unit 803 is configured to adjust the first voltage value again until the number of effective electrons meets a second preset condition, and determine the impulse discharge voltage of the ball-plate long gap operation.

[0132] The more specific implementation of each unit of the device for determining the ball-plate long gap operation impulse discharge voltage can be found in the description of the above-mentioned method for determining the ball-plate long gap operation impulse discharge voltage, and has similar beneficial effects, which will not be repeated here.

[0133] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for determining the ball-plate long gap operation impulse discharge voltage as described above is implemented.

[0134] Generally speaking, computer instructions for implementing the method of the present invention may be carried by any combination of one or more computer-readable storage media. Non-transitory computer-readable storage media may include any computer-readable media except for signals that are temporarily propagating.

[0135] A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0136] Computer program code for performing the operations of the present invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages, in particular, Python suitable for neural network computing and platform frameworks based on TensorFlow, PyTorch, etc. can be used. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, through the Internet using an Internet service provider).

[0137] The embodiment of the present invention further provides an electronic device, Figure 9 Come and see, Figure 9 This is a schematic structural diagram of an electronic device according to an embodiment of the present invention. The electronic device 900 includes a processor 901, a memory 902, and a computer program stored in the memory 902 and executable on the processor 901. When the processor 901 executes the program, the method for determining the ball-plate long gap operating impulse discharge voltage as described above is implemented.

[0138] As a preferred embodiment, the electronic device 900 further includes a display 903 for displaying the data processing result after the processor 901 executes the method for determining the ball-plate long gap operation impulse discharge voltage.

[0139] Exemplarily, the computer program may be divided into one or more modules / units, one or more of which are stored in the memory 902 and executed by the processor 901 to implement the present invention. One or more modules / units may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device 900. For example, the computer program may be divided into multiple units, including an acquisition unit 801, an adjustment unit 802, and a calculation unit 803. The specific functions of each unit are as described in the above sub-steps and are not further described here.

[0140] The electronic device 900 may be a desktop computer, notebook, PDA, or smart phone with an adjustable camera module.

[0141] Among them, the processor 901 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 901 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The various methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0142] The memory 902 may be, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory 902 is used to store programs. The processor 901 executes the programs after receiving an execution instruction. The process definition method disclosed in any of the aforementioned embodiments of the present invention may be applied to the processor 901 or implemented by the processor 901.

[0143] The display 903 may be an LCD display or an LED display, for example, a display on a mobile phone.

[0144] It is understandable that Figure 9 The structure shown is only a schematic diagram of the structure of the electronic device 900. The electronic device 900 may also include Figure 9 More or fewer components as shown. Figure 9 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0145] The computer-readable storage medium and electronic device provided according to the above embodiments of the present invention can be implemented with reference to the specific description of the method for determining the ball-plate long gap operation impulse discharge voltage as described above according to the present invention, and have similar beneficial effects as the method for determining the ball-plate long gap operation impulse discharge voltage as described above, which will not be repeated here.

[0146] The present invention discloses a method for determining the impulse discharge voltage of a ball-plate long gap operation. First, an estimated voltage value is effectively obtained; then, the estimated voltage value is applied to a high-voltage electrode to induce an electron avalanche, determine the total number of electrons at the boundary of the ionization zone, and continuously adjust the estimated voltage value according to the total number of electrons to achieve an expected condition, i.e., a first preset condition; then, considering the interstitial photoionization effect, the voltage of the high-voltage electrode is further increased to calculate the effective number of effective free electrons; finally, when the effective number of electrons reaches the expected condition, i.e., a second preset condition, the impulse discharge voltage of the ball-plate long gap operation is further calculated.

[0147] The technical solution of the present invention is based on the physical process of corona initiation and takes into account the spatial photoionization effect, and can efficiently and quickly determine the fixed ball-plate long gap operating impulse discharge voltage, thereby reducing the test labor and providing a basis for the refined design of external insulation.

[0148] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for determining the ball-plate long gap operating impulse discharge voltage, characterized in that: include: Get the estimated voltage value; applying the estimated voltage value to the high voltage electrode, and determining a first total number of electrons in an initial electron avalanche head portion and a second total number of electrons in a secondary electron avalanche head portion; Determining whether the first total number of electrons and the second total number of electrons meet a first preset condition; If not, increasing the estimated voltage value until the first preset condition is met, and recording the first voltage value finally generated after adjusting the estimated voltage value; The first preset condition includes: the first total number of electrons is equal to the second total number of electrons; determining the effective electron quantity based on waveform parameters and the first voltage value, wherein the waveform parameters are parameters of a voltage waveform applied to the ball-plate gap model and are determined based on the first voltage value; Adjusting the first voltage value to determine whether the effective electron quantity meets a second preset condition; If not, the first voltage value is increased until the second preset condition is met, and the impulse discharge voltage of the ball-plate long gap operation is determined. The second preset condition includes: the effective electron quantity is equal to a preset effective value.

2. The method for determining the ball-plate long gap operation impulse discharge voltage according to claim 1, characterized in that: The step of applying the estimated voltage value to the high voltage electrode and determining a first total number of electrons in an initial electron avalanche portion and a second total number of electrons in a secondary electron avalanche portion includes: determining the first total number of electrons in the initial electron avalanche head according to a first electric field strength function and a second electric field strength function about a boundary of the first ionization region; The second total number of electrons in the secondary electron avalanche head is determined based on the area factor function, the first probability of generating photons by impact ionization, the second probability of generating electrons by absorption of photons, the first electric field strength function, and the second electric field strength function, wherein the area factor function is a function about the boundary of the second ionization zone, and is used to calculate the area of ​​electrons that are not absorbed and disappear in the ionization zone formed at the boundary of the second ionization zone.

3. The method for determining the ball-plate long gap operation impulse discharge voltage according to claim 2, characterized in that: The process of determining the area factor function is as follows: Determine the radial component of the area factor based on the photon radiation distance, geometric parameters of multiple ionization zones, and photon absorption coefficient under standard meteorological conditions; The area factor function is determined according to the square of the radial component of the area factor.

4. The method for determining the ball-plate long gap operation impulse discharge voltage according to claim 1, characterized in that: The determining of the effective electron quantity according to the input waveform parameters and the first voltage value finally generated after adjusting the estimated voltage value includes: The effective electron quantity is determined by integrating the first moment corresponding to the first voltage value.

5. The method for determining the ball-plate long gap operation impulse discharge voltage according to claim 1, characterized in that: The method of determining the impulse discharge voltage of the ball-plate long gap operation includes: Determining the corona inception voltage according to a second voltage value ultimately generated after adjusting the first voltage value; determining a gap leader channel pressure drop according to the corona starting voltage, gap distance, and streamer channel field strength; Determining a minimum breakdown voltage based on the corona inception voltage and the gap pilot channel voltage drop; The impulse discharge voltage of the ball-plate long gap operation is determined based on the minimum breakdown voltage and the discharge voltage standard deviation.

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