Air-gap solid-sealed pole performance test platform and test method considering extreme temperatures

Abstract

This invention relates to the field of electrical equipment testing technology, and more particularly to a performance testing platform and method for air-gap solid-sealed poles that takes into account extreme temperatures. Specifically: the built-in upper and lower electrodes of the air-gap solid-sealed pole are connected to first and second high-voltage test electrodes, respectively; a power frequency voltage generator is connected to the first high-voltage test electrode via a high-voltage cable; a heat source is located on the side wall inside the high-voltage test chamber; a temperature control device is connected to the heat source; a temperature monitoring device is located inside the high-voltage test chamber; a weak current monitoring device is attached to the high-voltage cable; a data acquisition device is connected to both the temperature monitoring device and the weak current monitoring device; and a host computer is connected to the data acquisition device, the power frequency voltage generator, and the temperature control device. This invention can simulate extreme ambient temperatures within a switchgear using a heat source, and determine the degree of degradation of the air-gap solid-sealed pole by calculating the simulated ambient temperature and corresponding characteristic current, thereby achieving performance evaluation of the air-gap solid-sealed pole.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment testing technology, and in particular to a performance testing platform and method for air-gap type solid-sealed poles that takes into account extreme temperatures. Background Technology

[0002] Switchgear is a widely used combination of electrical equipment in power transmission and distribution. It is mainly used to open, close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion. Therefore, its service performance is directly related to the power supply quality.

[0003] Switchgear mainly consists of circuit breakers, insulating materials, disconnecting switches, load switches, instrument transformers, and various protection devices. Air-gap solid-sealed poles, as an integrated component combining circuit breakers and insulating materials, can simplify the internal structure of switchgear and have the advantages of high reliability and high insulation strength. The service performance of solid-sealed poles is also closely related to the service performance of switchgear.

[0004] Currently, the service performance testing of air-gap solid-sealed poles is conducted at the factory stage. Existing tests are limited to power frequency withstand voltage tests and partial discharge tests, but do not take into account the impact of extreme temperatures inside the switchgear on the working performance of air-gap solid-sealed poles. This results in inaccurate service performance testing of air-gap solid-sealed poles, causing the actual degradation process of air-gap solid-sealed poles to be faster than the planned degradation process, which affects the safety of the power system. Summary of the Invention

[0005] The first aspect of the present invention provides a performance testing platform for an air-gap type solid-sealed electrode that takes into account extreme temperatures, comprising: a high-voltage test chamber, a first high-voltage test electrode, a second high-voltage test electrode, a high-voltage cable, a power frequency voltage generator, a heat source, a temperature control device, a temperature monitoring device, a weak current monitoring device, a data acquisition device, a host computer, and a grounding grid;

[0006] The first high-voltage test electrode and the second high-voltage test electrode are spaced apart inside the high-voltage test chamber, forming a test station in the middle for setting the air-gap type solid-sealed electrode post, which is used to connect the upper electrode and the lower electrode of the air-gap type solid-sealed electrode post respectively.

[0007] The power frequency voltage generator is connected to the first high voltage test electrode via a high voltage cable, and is used to generate power frequency voltage and apply the power frequency voltage to the air gap type solid-sealed electrode through the first high voltage test electrode.

[0008] The second high-voltage test electrode is connected to the grounding grid;

[0009] The heat source is located on the side wall inside the high-pressure test chamber;

[0010] The temperature control device is connected to the heat source and is used to control the heating of the heat source;

[0011] The temperature monitoring device is installed inside the high-pressure test chamber and is used to monitor the temperature changes inside the high-pressure test chamber.

[0012] The weak current monitoring device is sleeved on the high voltage cable and is used to monitor the characteristic current generated by the air gap solid-sealed pole.

[0013] The data acquisition device is connected to the temperature monitoring device and the weak current monitoring device respectively, and is used to send the temperature data in the high-voltage test chamber and the characteristic current data of the air gap solid-sealed pole to the host computer.

[0014] The host computer is connected to the data acquisition device, the power frequency voltage generator, and the temperature control device, respectively, and is used to record the temperature data in the high-voltage test chamber and the characteristic current data of the air gap solid-sealed pole, send temperature control signals to the temperature control device, and control the power frequency voltage generator to generate power frequency voltage.

[0015] Specifically, the heat source includes a first heating unit, a second heating unit, a third heating unit, and a fourth heating unit, which are symmetrically arranged on the side wall of the high-pressure test chamber and are spaced equally apart.

[0016] Specifically, the temperature monitoring device includes: a first monitoring unit, a second monitoring unit, a third monitoring unit, and a fourth monitoring unit, which are respectively arranged at equal intervals around the testing station;

[0017] The temperature monitored by the temperature monitoring device is the arithmetic average of the temperatures monitored by the first monitoring unit, the second monitoring unit, the third monitoring unit, and the fourth monitoring unit.

[0018] Specifically, the data acquisition device includes: a data acquisition unit and a wireless transceiver unit.

[0019] The data acquisition unit is connected to the temperature monitoring device and the weak current monitoring device;

[0020] The wireless transceiver unit is connected to the data acquisition unit and wirelessly connected to the host computer, and is used to send the data acquired by the data acquisition unit to the host computer in the form of wireless transmission.

[0021] Another aspect of the present invention provides a method for testing the performance of air-gap solid-sealed terminals considering extreme temperatures, applied to a test platform for the performance of air-gap solid-sealed terminals considering extreme temperatures, comprising the following steps:

[0022] S10: The temperature monitoring device monitors the internal temperature of the high-pressure test chamber in real time and sends a temperature control signal to the temperature control device according to the preset temperature value, so as to control the heat source to raise the internal temperature of the high-pressure test chamber through the temperature control device. When the internal temperature changes to the preset temperature range, heating is stopped.

[0023] S20: Control the power frequency voltage generator to apply voltage to the air gap solid-sealed pole according to the preset voltage value, and monitor the characteristic current of the air gap solid-sealed pole in real time through the weak current monitoring device.

[0024] S30: Increase the preset temperature and repeat steps S10-S20 until the preset temperature value is increased to the maximum preset temperature value;

[0025] S40: Acquire the initial temperature data of the high-voltage test chamber, the temperature data after each heating is stopped, and the characteristic current data corresponding to each temperature data point;

[0026] S50: Establish the characteristic current equation for the air-gap solid-sealed pole to obtain the functional relationship between the temperature data after each heating stop and the theoretical characteristic current data at the corresponding time of each temperature data.

[0027] S60: The characteristic current equation of the air-gap solid-sealed pole is optimized and modeled using the particle swarm optimization algorithm. Based on the characteristic current data at each time corresponding to each temperature data, the temperature data after each heating is stopped, the functional relationship between the theoretical characteristic current data at each time corresponding to each temperature data, and the number of preset temperature values, the Gaussian error coefficient value that minimizes the error between the characteristic current data and the theoretical characteristic current data is obtained.

[0028] S70: Substitute the Gaussian error coefficient value with the smallest error into the characteristic current equation of the air gap solid-sealed pole to obtain the optimized characteristic current equation of the air gap solid-sealed pole, and calculate the optimized characteristic current of the air gap solid-sealed pole.

[0029] S80: Calculate the performance degradation evaluation factor based on the optimized characteristic current of the air-gap solid-sealed electrode and the preset characteristic current benchmark value of the air-gap solid-sealed electrode.

[0030] S90: Determine the service performance of the air-gap solid-sealed pole according to the performance degradation assessment factor.

[0031] Specifically, step S60 includes the following steps:

[0032] S61: Generate an initial population with uniformly distributed particles and velocities, and set the stopping conditions;

[0033] S62: Based on multiple characteristic current data, multiple theoretical characteristic current data, and the number of preset temperature values, establish a function for the Gaussian error coefficient value;

[0034] S63: Update the individual historical best position of each particle and the best position of the entire swarm;

[0035] S64: Update the velocity and position of each particle;

[0036] S65: If the stopping condition is met, output the Gaussian error coefficient value that minimizes the error between the characteristic current data and the theoretical characteristic current data; otherwise, return to step S62.

[0037] Specifically, raising the preset temperature value means:

[0038] The preset temperature value is increased at equal intervals according to the preset temperature increment.

[0039] Specifically, the establishment of the characteristic current equation for the air-gap solid-sealed electrode is as follows:

[0040] The characteristic current equation for the air-gap solid-sealed electrode is established based on the functional relationship between insulation resistance, process factor of characteristic current of air-gap solid-sealed electrode, Gaussian error coefficient taking temperature into account, initial temperature, temperature after heating is stopped, and theoretical characteristic current.

[0041] Specifically, the insulation resistance is calculated using the power frequency voltage and the characteristic current data corresponding to the initial temperature data.

[0042] Specifically, determining the service performance of the air-gap solid-sealed pole based on the performance degradation assessment factor includes:

[0043] The performance degradation assessment factor is preset to a certain range. When the value of the performance degradation assessment factor is within the range, the air gap solid-sealed terminal is judged to have good performance. When the value of the performance degradation assessment factor is outside the range, the air gap solid-sealed terminal is judged to need maintenance.

[0044] The beneficial effects of this invention are as follows: This embodiment provides a performance testing platform for an air-gap type solid-sealed electrode, comprising: a high-voltage test chamber, a first high-voltage test electrode, a second high-voltage test electrode, a high-voltage cable, a power frequency voltage generator, a heat source, a temperature control device, a temperature monitoring device, a weak current monitoring device, a data acquisition device, a host computer, and a grounding grid; the first and second high-voltage test electrodes are spaced apart within the high-voltage test chamber, forming a test station in the middle for setting the air-gap type solid-sealed electrode, which is used to connect the upper and lower electrodes of the air-gap type solid-sealed electrode; the power frequency voltage generator is connected to the first high-voltage test electrode via a high-voltage cable, used to generate a power frequency voltage and apply the power frequency voltage to the air-gap type solid-sealed electrode through the first high-voltage test electrode; the second high-voltage test electrode is connected to the grounding grid. The heat source is located on the side wall inside the high-voltage test chamber; the temperature control device is connected to the heat source to control its heating; the temperature monitoring device is located inside the high-voltage test chamber to monitor temperature changes; the weak current monitoring device is connected to the high-voltage cable to monitor the characteristic current generated by the air-gap solid-sealed electrode; the data acquisition device is connected to both the temperature monitoring device and the weak current monitoring device to send the temperature data and characteristic current data of the air-gap solid-sealed electrode inside the high-voltage test chamber to the host computer; the host computer is connected to the data acquisition device, the power frequency voltage generator, and the temperature control device to record the temperature data and characteristic current data of the air-gap solid-sealed electrode inside the high-voltage test chamber, send temperature control signals to the temperature control device, and control the power frequency voltage generator to generate power frequency voltage.

[0045] The present invention provides a performance testing platform for air-gap solid-sealed poles, which can provide the air-gap solid-sealed poles under test with an extreme temperature environment and operating voltage that is very close to that inside the switch cabinet, and record the characteristic current of the air-gap solid-sealed poles, thereby providing a basis for evaluating the working performance of the air-gap solid-sealed poles under test.

[0046] This invention also provides a performance testing method for an air-gap solid-sealed electrode, specifically including the following steps: S10: Controlling a power frequency voltage generator to apply voltage to the air-gap solid-sealed electrode according to a preset voltage value, and monitoring the temperature inside the high-voltage test chamber and the characteristic current of the air-gap solid-sealed electrode through a temperature monitoring device and a weak current monitoring device; S20: Sending a temperature control signal to a temperature control device according to a preset temperature value, and then controlling the heat source to raise the internal temperature of the high-voltage test chamber through the temperature control device, and stopping heating when the internal temperature rises to the preset temperature range; S30: Increasing the preset temperature and repeating step S20 until the preset temperature value is increased to the maximum preset temperature value; S40: Obtaining the initial temperature data of the high-voltage test chamber, the temperature data after each heating is stopped, and the characteristic current data corresponding to each temperature data; S50: Establishing the characteristic current equation for the air-gap solid-sealed electrode to obtain the temperature data after each heating is stopped. S60: The characteristic current equation of the air-gap solid-sealed electrode is optimized and modeled using a particle swarm optimization algorithm. Based on the functional relationship between the characteristic current data, the temperature data after each heating stop, and the corresponding theoretical characteristic current data, and the number of preset temperature values, the Gaussian error coefficient value that minimizes the error between the characteristic current data and the theoretical characteristic current data is obtained. S70: The Gaussian error coefficient value that minimizes the error is substituted into the characteristic current equation of the air-gap solid-sealed electrode to obtain the optimized characteristic current equation of the air-gap solid-sealed electrode, and the characteristic current of the optimized air-gap solid-sealed electrode is obtained. S80: Based on the optimized characteristic current of the air-gap solid-sealed electrode and the preset characteristic current benchmark value of the air-gap solid-sealed electrode, the performance degradation evaluation factor is obtained. S90: The service performance of the air-gap solid-sealed electrode is determined based on the performance degradation evaluation factor.

[0047] The performance testing method for air-gap solid-sealed terminals provided by this invention, applied to the performance testing platform for air-gap solid-sealed terminals provided by this invention, can obtain characteristic current data corresponding to extreme temperatures and provide the relationship between extreme temperatures and theoretical characteristic data. Furthermore, it links the theoretical characteristic data with the characteristic data, optimizes the tested characteristic current data using the theoretical characteristic current data, obtains the characteristic current value that is closest to the actual degradation situation, and then compares it with the preset characteristic current benchmark value to accurately obtain the performance test results of the air-gap solid-sealed terminal under test. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the performance testing platform for air-gap solid-sealed poles.

[0050] Figure 2 Flowchart of the performance testing method for air-gap solid-sealed poles;

[0051] Figure labels: 1-High voltage test chamber; 2-First high voltage test electrode; 3-Second high voltage test electrode; 4-High voltage cable; 5-Power frequency voltage generator; 6-Heat source; 7-Temperature control device; 8-Temperature monitoring device; 9-Weak current monitoring device; 10-Data acquisition device; 11-Host computer; 12-Grounding grid. Detailed Implementation

[0052] The technical solutions in 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The first aspect of this invention provides a performance testing platform for an air-gap type solid-sealed electrode that takes into account extreme temperatures. The air-gap type solid-sealed electrode includes an upper electrode and a lower electrode, which are isolated by an insulating gas. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a schematic diagram of the performance testing platform for air-gap solid-sealed poles.

[0054] The air-gap type solid-sealed electrode performance testing platform includes: a high-voltage test chamber 1, a first high-voltage test electrode 2, a second high-voltage test electrode 3, a high-voltage cable 4, a power frequency voltage generator 5, a heat source 6, a temperature control device 7, a temperature monitoring device 8, a weak current monitoring device 9, a data acquisition device 10, a host computer 11, and a grounding grid 12.

[0055] The first high-voltage test electrode 2 and the second high-voltage test electrode 3 are spaced apart inside the high-voltage test chamber 1, forming a test station in the middle for setting the air gap type solid-sealed electrode, which is used to connect the upper electrode and the lower electrode of the air gap type solid-sealed electrode to be tested, respectively.

[0056] The power frequency voltage generator 5 is connected to the first high voltage test electrode 3 via a high voltage cable 4, and is used to generate power frequency voltage and apply it to the air gap type solid-sealed pole through the first high voltage test electrode 2.

[0057] The second high-voltage test electrode 3 is connected to the grounding grid 12 and is used to conduct current into the ground;

[0058] Heat source 6 is located on the side wall inside the high-pressure test chamber 1 to change the internal temperature of the high-pressure test chamber 1;

[0059] The temperature control device 7 is connected to the heat source 6 and is used to control the heating temperature of the heat source 6;

[0060] Temperature monitoring device 8 is installed inside high-pressure test chamber 1 to monitor temperature changes inside high-pressure test chamber 1;

[0061] The weak current monitoring device 9 is connected to the high voltage cable 4 to monitor the characteristic current generated by the air gap solid-sealed pole.

[0062] The data acquisition device 10 is connected to the temperature monitoring device 8 and the weak current monitoring device 9 respectively, and is used to send the temperature data and the characteristic current data of the air gap solid-sealed pole in the high voltage test chamber 1 to the host computer 11.

[0063] The host computer 11 is connected to the data acquisition device 10, the power frequency voltage generator 5 and the temperature control device 7 respectively. It is used to record the temperature data in the high voltage test chamber 1 and the characteristic current data of the air gap solid-sealed pole, send control signals to the temperature control device 7 according to multiple preset temperature values ​​and temperature data, and continuously control the power frequency voltage generator 5 to generate voltage according to the preset voltage value.

[0064] In the specific implementation process, the host computer 1 controls the power frequency voltage generator 2 to generate power frequency voltage according to the preset voltage value, and applies the power frequency voltage to the air gap solid-sealed pole under test through the high voltage cable 4; and the temperature data in the high voltage test chamber 1 and the characteristic current data in the high voltage cable 4 are collected in real time through the temperature monitoring device 8 and the weak current monitoring device 9; the host computer 11 sends a control signal to the temperature control device 6 according to the preset temperature value, and the temperature control device 6 controls the heat source 7 to heat up according to the control signal of the host computer 11 to test the air gap solid-sealed pole.

[0065] The data acquisition device 10 collects the temperature data and characteristic current data of the air gap solid-sealed pole inside the high-voltage test chamber 1 and sends them to the host computer 11 for recording.

[0066] When the temperature inside the high-pressure test chamber 1 rises to the preset temperature, heating is stopped and the preset temperature is increased to prepare for the next round of testing.

[0067] In another specific embodiment of the present invention, the heat source 6 includes: a first heating unit, a second heating unit, a third heating unit, and a fourth heating unit, which are symmetrically arranged on the side wall of the high-voltage test chamber 1 respectively, and have equal spacing.

[0068] It can be understood that the present invention can flexibly set any number of heating units according to specific implementation requirements, including considerations of energy conservation, more efficient heating, or more uniform heating of the air-gap type solid-sealed pole column.

[0069] In another specific embodiment of the present invention, the temperature monitoring device 8 includes: a first monitoring unit, a second monitoring unit, a third monitoring unit, and a fourth monitoring unit, which are arranged at equal intervals around the air-gap type solid-sealed pole column respectively.

[0070] In another more specific embodiment of the present invention, after the upper computer 11 obtains the temperature data of the first monitoring unit, the second monitoring unit, the third monitoring unit, and the fourth monitoring unit collected by the data acquisition device, it takes the arithmetic mean of the temperature data detected by each monitoring unit for recording.

[0071] In another specific embodiment of the present invention, the data acquisition device 10 includes: a data acquisition unit and a wireless transceiver unit;

[0072] The data acquisition unit is respectively connected to the temperature monitoring device 8 and the weak current monitoring device 9, and is used for acquiring the temperature data monitored by the temperature monitoring device 8 and the characteristic current data monitored by the weak current monitoring device 9;

[0073] The data transceiver unit is connected to the data acquisition unit and is wirelessly connected to the upper computer 11, and is used for receiving the data collected by the data acquisition unit and sending it to the upper computer in the form of wireless transmission.

[0074] On the other hand, the present invention also provides an embodiment of a method for testing the performance of an air-gap type solid-sealed pole column, as Figure 2 shown, which specifically includes the following steps:

[0075] S10: Real-time monitor the internal temperature of the high-voltage test chamber through the temperature monitoring device, and send a temperature control signal to the temperature control device according to the preset temperature value T a to control the heat source to increase the internal temperature T of the high-voltage test chamber through the temperature control device. When the internal temperature changes to |T a -T| < d, stop heating;

[0076] Where: d is the preset temperature interval value;

[0077] S20: Control the power frequency voltage generator to apply a voltage to the air-gap type solid-sealed pole column according to the preset voltage value U, and real-time monitor the characteristic current I of the air-gap type solid-sealed pole column through the weak current monitoring device m ;

[0078] S30: Increase the preset temperature by Q, and repeat steps S10-S20 until the temperature reaches T. d Stop testing;

[0079] Where: Q is the temperature setting increment; T d This is the preset maximum temperature value;

[0080] S40: Obtain the initial temperature T0 and the temperature of each test within the high-pressure test chamber. a T i ...T d A characteristic current equation for the air-gap solid-sealed electrode was established, and the functional relationship between the experimental temperature and the theoretical characteristic current data I was obtained. The equation is as follows:

[0081]

[0082] Where: β is the characteristic current process factor of the air-gap solid-sealed electrode, ε is the dielectric constant, σ is the insulation resistance, η is the integral variable, and α, γ, δ, ... Both are Gaussian error coefficients that take temperature into account, T i The temperature inside the high-pressure test chamber during the i-th experiment;

[0083] S50: The characteristic current equation (1) of the air-gap solid-sealed pole is optimized and modeled using the particle swarm optimization algorithm, and based on the characteristic current data I m 1. Establish a function of the Gaussian error coefficient value based on the theoretical characteristic current data I, and calculate the characteristic current data I that makes the air-gap solid-sealed pole more efficient. m The Gaussian error coefficients α0, γ0, and δ0 that minimize the error between the theoretical characteristic current data I of the air-gap solid-sealed pole and the actual current are...

[0084] S60: The Gaussian error coefficient values ​​α0, γ0, δ0, Substituting into equation (1), we obtain the optimized characteristic current I0 of the air-gap solid-sealed pole.

[0085]

[0086] S70: Based on the optimized characteristic current I0 of the air-gap solid-sealed terminal block and the preset reference value I of the characteristic current of the air-gap solid-sealed terminal block. b The performance degradation assessment factor ψ is calculated using the following formula:

[0087] ψ=lnI0-lnI b

[0088] When ψ∈(e 0.85 ,e 1.15When ψ∈(0, e), it indicates that the switchgear is in normal service performance; when ψ∈(0, e) 0.85 ]∪[e 1.15 [+∞] characterizes the performance degradation of the switchgear during service.

[0089] In another more specific embodiment of the method of the present invention, step S50 specifically comprises:

[0090] S51: Generate an initial population with uniformly distributed particles and velocities, and set the stopping conditions;

[0091] S52: Based on characteristic current data I m Establish a functional relationship between the theoretical characteristic current data I and the Gaussian error coefficient values;

[0092]

[0093] In the formula: Let I represent the objective function. i Let I be the theoretical characteristic current of the air-gap solid-sealed electrode in the i-th experiment. mi is the characteristic current of the air-gap solid-sealed electrode in the i-th experiment, and M is the number of preset temperature values;

[0094] S53: Update the individual historical best position of each particle and the best position of the entire swarm;

[0095] S54: Update the velocity and position of each particle until the stopping condition is met;

[0096] S55: If the stopping condition is met, output a value that makes the characteristic current data I equal to the theoretical characteristic current data I. m The Gaussian error coefficients α0, γ0, and δ0 with the smallest error among them are: If the condition is not met, return to step S52.

[0097] In another more specific embodiment of the present invention, the value of insulation resistance σ can be calculated from the value of power frequency voltage and characteristic current data corresponding to the initial temperature, or it can be obtained from the factory nameplate of the air gap type solid-sealed pole.

[0098] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0099] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0100] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0101] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

Claims

1. A test method based on a performance testing platform for air-gap solid-sealed terminals considering extreme temperatures, wherein the performance testing platform for air-gap solid-sealed terminals considering extreme temperatures comprises: High voltage test chamber, first high voltage test electrode, second high voltage test electrode, high voltage cable, power frequency voltage generator, heat source, temperature control device, temperature monitoring device, weak current monitoring device, data acquisition device, host computer, grounding grid; The first high-voltage test electrode and the second high-voltage test electrode are spaced apart inside the high-voltage test chamber, forming a test station in the middle for setting the air-gap type solid-sealed electrode post, which is used to connect the upper electrode and the lower electrode of the air-gap type solid-sealed electrode post respectively. The power frequency voltage generator is connected to the first high voltage test electrode via a high voltage cable, and is used to generate power frequency voltage and apply the power frequency voltage to the air gap type solid-sealed electrode through the first high voltage test electrode. The second high-voltage test electrode is connected to the grounding grid; The heat source is located on the side wall inside the high-pressure test chamber; The temperature control device is connected to the heat source and is used to control the heating of the heat source; The temperature monitoring device is installed inside the high-pressure test chamber and is used to monitor the temperature changes inside the high-pressure test chamber. The weak current monitoring device is sleeved on the high voltage cable and is used to monitor the characteristic current generated by the air gap solid-sealed pole. The data acquisition device is connected to the temperature monitoring device and the weak current monitoring device respectively, and is used to send the temperature data in the high-voltage test chamber and the characteristic current data of the air gap solid-sealed pole to the host computer. The host computer is connected to the data acquisition device, the power frequency voltage generator, and the temperature control device, respectively, and is used to record the temperature data in the high voltage test chamber and the characteristic current data of the air gap solid-sealed pole, send temperature control signals to the temperature control device, and control the power frequency voltage generator to generate power frequency voltage. Its characteristic is that it includes the following steps: S10: The temperature monitoring device monitors the internal temperature of the high-pressure test chamber in real time and sends a temperature control signal to the temperature control device according to the preset temperature value, so as to control the heat source to raise the internal temperature of the high-pressure test chamber through the temperature control device. When the internal temperature changes to the preset temperature range, heating is stopped. S20: Control the power frequency voltage generator to apply voltage to the air gap solid-sealed pole according to the preset voltage value, and monitor the characteristic current of the air gap solid-sealed pole in real time through the weak current monitoring device. S30: Increase the preset temperature and repeat steps S10-S20 until the preset temperature value is increased to the maximum preset temperature value; S40: Acquire the initial temperature data of the high-voltage test chamber, the temperature data after each heating is stopped, and the characteristic current data corresponding to each temperature data point; S50: Establish the characteristic current equation for the air-gap solid-sealed pole to obtain the functional relationship between the temperature data after each heating stop and the theoretical characteristic current data at the corresponding time of each temperature data. S60: The characteristic current equation of the air-gap solid-sealed pole is optimized and modeled using the particle swarm optimization algorithm. Based on the characteristic current data at each time corresponding to each temperature data, the temperature data after each heating is stopped, the functional relationship between the theoretical characteristic current data at each time corresponding to each temperature data, and the number of preset temperature values, the Gaussian error coefficient value that minimizes the error between the characteristic current data and the theoretical characteristic current data is obtained. S70: Substitute the Gaussian error coefficient value with the smallest error into the characteristic current equation of the air gap solid-sealed pole to obtain the optimized characteristic current equation of the air gap solid-sealed pole, and calculate the optimized characteristic current of the air gap solid-sealed pole. S80: Calculate the performance degradation evaluation factor based on the optimized characteristic current of the air-gap solid-sealed electrode and the preset characteristic current benchmark value of the air-gap solid-sealed electrode. S90: Determine the service performance of the air-gap solid-sealed pole according to the performance degradation assessment factor.

2. The test method based on the performance test platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 1, characterized in that, The heat source includes a first heating unit, a second heating unit, a third heating unit, and a fourth heating unit, which are symmetrically arranged on the side wall of the high-pressure test chamber and are spaced equally apart.

3. The test method based on the performance test platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 1, characterized in that, The temperature monitoring device includes a first monitoring unit, a second monitoring unit, a third monitoring unit, and a fourth monitoring unit, which are arranged at equal intervals around the test station. The temperature monitored by the temperature monitoring device is the arithmetic average of the temperatures monitored by the first monitoring unit, the second monitoring unit, the third monitoring unit, and the fourth monitoring unit.

4. The test method based on the performance test platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 1, characterized in that, The data acquisition device includes: a data acquisition unit and a wireless transceiver unit. The data acquisition unit is connected to the temperature monitoring device and the weak current monitoring device; The wireless transceiver unit is connected to the data acquisition unit and wirelessly connected to the host computer, and is used to send the data acquired by the data acquisition unit to the host computer in the form of wireless transmission.

5. The test method based on the performance test platform of the air-gap solid-sealed pole considering extreme temperatures according to claim 1, characterized in that, Step S60 specifically includes the following steps: S61: Generate an initial population with uniformly distributed particles and velocities, and set the stopping conditions; S62: Based on multiple characteristic current data, multiple theoretical characteristic current data, and the number of preset temperature values, establish a function for the Gaussian error coefficient value; S63: Update the individual historical best position of each particle and the best position of the entire swarm; S64: Update the velocity and position of each particle; S65: If the stopping condition is met, output the Gaussian error coefficient value that minimizes the error between the characteristic current data and the theoretical characteristic current data; otherwise, return to step S62.

6. The test method for the performance testing platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 1, characterized in that, The process of raising the preset temperature value specifically involves: The preset temperature value is increased at equal intervals according to the preset temperature increment.

7. The test method based on the performance test platform of the air-gap solid-sealed pole considering extreme temperatures according to claim 1, characterized in that, The establishment of the characteristic current equation for the air-gap solid-sealed electrode is specifically as follows: The characteristic current equation for the air-gap solid-sealed electrode is established based on the functional relationship between insulation resistance, process factor of characteristic current of air-gap solid-sealed electrode, Gaussian error coefficient taking temperature into account, initial temperature, temperature after heating is stopped, and theoretical characteristic current.

8. The test method for the performance testing platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 7, characterized in that, The insulation resistance is calculated using the power frequency voltage and the characteristic current data corresponding to the initial temperature data.

9. The test method for the performance testing platform of the air-gap solid-sealed pole considering extreme temperatures as described in claim 1, characterized in that, The process of determining the service performance of the air-gap solid-sealed electrode based on the performance degradation evaluation factor specifically includes: The performance degradation assessment factor is preset to a certain range. When the value of the performance degradation assessment factor is within the range, the air gap solid-sealed terminal is judged to have good performance. When the value of the performance degradation assessment factor is outside the range, the air gap solid-sealed terminal is judged to need maintenance.

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