阅读说明：本技术 一种避雷器电阻片侧面釉放电测试系统 (lightning arrester resistor sheet side glaze discharge test system ) 是由 贾磊 蔡汉生 刘刚 胡上茂 廖民传 张义 施健 屈路 胡泰山 李瑞显 梅琪 刘 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种避雷器电阻片侧面釉放电测试系统,其包括变频电源模块、变压器、电抗器模块、分压器、峰值电压表与电阻片模块；所述变压器的低压侧与所述变频电源模块连接,所述变压器的高压侧的一端与所述电抗器模块连接,所述变压器的高压侧的另一端与所述分压器连接；所述电抗器模块包括串联电抗器；所述峰值电压表的一端连接在所述分压器的高压臂与低压臂之间,所述峰值电压表的另一端与所述变压器的高压侧的另一端相连,且所述峰值电压表的另一端接地。本发明实施例提供的避雷器电阻片侧面釉放电测试系统,其可以有效地限制短路电流,可以对不同工况的避雷器的闪络特性进行有效地测试,电路拓扑结构简单,测试结果准确且有效。(The invention discloses a lightning arrester resistor disc side glaze discharge test system which comprises a variable frequency power supply module, a transformer, a reactor module, a voltage divider, a peak voltmeter and a resistor disc module, wherein the variable frequency power supply module is connected with the transformer; the low-voltage side of the transformer is connected with the variable-frequency power supply module, one end of the high-voltage side of the transformer is connected with the reactor module, and the other end of the high-voltage side of the transformer is connected with the voltage divider; the reactor module comprises a series reactor; one end of the peak voltmeter is connected between the high-voltage arm and the low-voltage arm of the voltage divider, the other end of the peak voltmeter is connected with the other end of the high-voltage side of the transformer, and the other end of the peak voltmeter is grounded. The lightning arrester resistor sheet side glaze discharge test system provided by the embodiment of the invention can effectively limit short-circuit current, can effectively test flashover characteristics of lightning arresters under different working conditions, and has the advantages of simple circuit topological structure and accurate and effective test result.)

1. The utility model provides a lightning arrester resistor piece side glaze discharge test system which characterized in that includes: the device comprises a variable frequency power supply module, a transformer, a reactor module, a voltage divider, a peak voltmeter and a resistance card module;

The variable frequency power supply module comprises a variable frequency power supply, and the variable frequency power supply is used for outputting a pure sine wave;

The low-voltage side of the transformer is connected with the variable-frequency power supply module, one end of the high-voltage side of the transformer is connected with the reactor module, and the other end of the high-voltage side of the transformer is connected with the voltage divider;

The reactor module comprises a series reactor for limiting short-circuit current;

One end of the peak voltmeter is connected between the high-voltage arm and the low-voltage arm of the voltage divider, the other end of the peak voltmeter is connected with the other end of the high-voltage side of the transformer, and the other end of the peak voltmeter is grounded;

The resistance card module comprises at least two resistance cards which are connected in series, and the resistance card module is connected to two ends of the voltage divider in parallel.

2. The lightning arrester resistor sheet side glaze discharge test system according to claim 1, wherein the output voltage of the transformer is 20-1000 kV.

3. The lightning arrester resistor sheet side glaze discharge test system of claim 1, wherein the resistor sheet is a GA2 type resistor sheet.

4. The lightning arrester resistor sheet side glaze discharge test system of claim 3, wherein the thickness of the GA2 type resistor sheet is 22 mm.

5. The lightning arrester resistor sheet side glaze discharge test system of claim 1, wherein the number of resistor sheets is 6.

6. The lightning arrester resistor sheet side glaze discharge test system of claim 1, wherein the number of resistor sheets is 12.

7. The lightning arrester resistor sheet side glaze discharge test system of claim 1, wherein the number of resistor sheets is 30.

8. The lightning arrester resistor sheet side glaze discharge test system of claim 1, wherein the number of resistor sheets is 45.

Technical Field

The invention relates to the field of power equipment, in particular to a lightning arrester resistor disc side glaze discharge test system.

Background

The core component of the arrester is a zinc oxide resistance card, and the quality of the performance of the zinc oxide resistance card can directly influence the overall electrical performance and the service life of the arrester. The zinc oxide resistor sheet side glaze is an important factor affecting its electrical performance. Generally, the glaze layer is coated on the side surface of the resistance card, and the thickness and the uneven state of the glaze layer have certain influence on the flashover characteristic of the resistance card, so that the flashover voltage dispersion of the resistance card is changed differently. The existing flashover characteristic test of the resistor sheet side glaze has a complex circuit structure and can be influenced by short-circuit current, and the short-circuit current can influence voltage drop in a circuit and further influence the detection of the flashover characteristic of the arrester resistor sheet side glaze voltage, so that the judgment of the electrical performance of the resistor sheet is wrong, and the correct flashover characteristic cannot be obtained.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a lightning arrester resistance card side glaze discharge test system capable of accurately testing flashover characteristics of the lightning arrester resistance card under different conditions.

In order to achieve the above object, the present invention provides a discharge test system for side glaze of a resistor disc of an arrester, comprising: the device comprises a variable frequency power supply module, a transformer, a reactor module, a voltage divider, a peak voltmeter and a resistance card module.

the variable frequency power supply module comprises a variable frequency power supply, and the variable frequency power supply is used for outputting pure sine waves.

The low-voltage side of the transformer is connected with the variable-frequency power supply module, one end of the high-voltage side of the transformer is connected with the reactor module, and the other end of the high-voltage side of the transformer is connected with the voltage divider.

the reactor module comprises a series reactor for limiting short circuit current.

One end of the peak voltmeter is connected between the high-voltage arm and the low-voltage arm of the voltage divider, the other end of the peak voltmeter is connected with the other end of the high-voltage side of the transformer, and the other end of the peak voltmeter is grounded.

The resistance card module comprises at least two resistance cards which are connected in series, and the resistance card module is connected to two ends of the voltage divider in parallel.

As an improvement of the scheme, the output voltage of the transformer is 20-1000 kV.

As a modification of the scheme, the resistor disc is a GA2 type resistor disc.

As a modification of the scheme, the thickness of the resistor disc is 22 mm.

As a modification of the scheme, the number of the resistor discs is 6.

As a modification of the scheme, the number of the resistor discs is 12.

As a modification of the scheme, the number of the resistor discs is 30.

as a modification of the scheme, the number of the resistor discs is 45.

According to the lightning arrester resistor sheet side glaze discharge test system, the specific variable frequency power supply, the transformer, the reactor module, the voltage divider, the peak voltmeter and the resistor sheet module are combined, and meanwhile, the reactor module adopts the series reactor, so that short-circuit current can be effectively limited, the short-circuit current is prevented from influencing voltage drop in a circuit, further detection of the lightning arrester resistor sheet side glaze voltage flashover characteristic is influenced, the whole lightning arrester resistor sheet side glaze discharge test system can effectively test the flashover characteristics of lightning arresters under different working conditions, the circuit topology structure is simple, and the test result is accurate and effective.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lightning arrester resistor sheet side glaze discharge test system according to an embodiment of the present invention;

Fig. 2 is a partial test data table of a lightning arrester resistor sheet side glaze discharge test system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In describing embodiments of the present invention, it should be noted that the invention may be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In addition, the invention is operational with numerous general purpose or special purpose computing device environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multi-processor apparatus, distributed computing environments that include any of the above devices or equipment, and the like.

The embodiment of the present invention provides a system for testing discharge of a side glaze of a resistor disc of an arrester, and specifically, please refer to fig. 1, which is a schematic structural diagram of the system for testing discharge of the side glaze of the resistor disc of the arrester according to the embodiment of the present invention, and the system includes: the device comprises a variable frequency power supply module, a transformer, a reactor module, a voltage divider, a peak voltmeter and a resistance card module.

The variable frequency power supply module comprises a variable frequency power supply which is used for outputting pure sine waves.

The low-voltage side of the transformer is connected with the variable-frequency power supply module, one end of the high-voltage side of the transformer is connected with the reactor module, and the other end of the high-voltage side of the transformer is connected with the voltage divider; the reactor module comprises a series reactor for limiting short circuit current.

One end of the peak voltmeter is connected between the high-voltage arm and the low-voltage arm of the voltage divider, the other end of the peak voltmeter is connected with the other end of the high-voltage side of the transformer, and the other end of the peak voltmeter is grounded.

The resistance card module comprises at least two resistance cards which are connected in series, and the resistance card module is connected to two ends of the voltage divider in parallel.

According to the lightning arrester resistor sheet side glaze discharge test system provided by the embodiment of the invention, through combining the specific variable frequency power supply, the transformer, the reactor module, the voltage divider, the peak voltage meter and the resistor sheet module, and simultaneously, the reactor module adopts the series reactor, the short-circuit current can be effectively limited, the short-circuit current is prevented from influencing the voltage drop in the circuit, and further the detection of the lightning arrester resistor sheet side glaze voltage flashover characteristic is influenced, so that the whole lightning arrester resistor sheet side glaze discharge test system can effectively test the flashover characteristics of lightning arresters under different working conditions, the circuit topology structure is simple, and the test result is accurate and effective.

it should be noted that, during the discharge test, the resistance card module of the resistance card of the whole lightning arrester is rapidly increased to 75% U (where U is an approximate value of flashover voltage and is determined by the actual working condition and parameters of the lightning arrester), the voltage is increased at the speed of 2% U/s until the side glaze flashover phenomenon occurs, the test voltage value of the peak voltmeter during flashover is recorded, the test frequency is preferably 10 times, and the test frequency can also be adjusted according to the actual situation, and each time is separated by 5min, so as to ensure that the free charge generated by the last discharge is dissipated, and the discharge voltage of each time is closer to the actual value. The measurements ensure that the free charge generated by the last discharge dissipates, making each voltage closer to the true value. The height of the glaze on the side surface of the resistor sheet is measured, so that the test result is more real and reliable.

And if the data in the test process are obviously different, checking the resistance card, and if the resistance card has breakdown and surface flashover arc traces, replacing the resistance card and then continuing the test.

Preferably, in this embodiment, the test temperature is 14.5 ℃. The output voltage of the transformer is 20-1000 kV.

Preferably, in the present embodiment, the resistive sheet is a GA2 resistive sheet. It should be noted that the type of the resistance card is selected according to the specific actual situation, and a plurality of different sets of resistance cards can be selected for testing.

Preferably, in the above embodiment, the thickness of the GA2 type resistor sheet is 22 mm. It should be noted that the thickness of the resistive sheet depends on the actual situation.

Preferably, in the present embodiment, the number of the resistive sheets is 6. It should be noted that the number of the resistive sheets is selected according to the actual situation.

Preferably, in the present embodiment, the number of the resistive sheets is 12.

Preferably, in the present embodiment, the number of the resistive sheets is 30.

Preferably, in the present embodiment, the number of the resistive sheets is 45.

Please refer to fig. 2, which is a partial test data table of a lightning arrester resistor sheet side glaze discharge test system according to an embodiment of the present invention. In actual operation, different types and thicknesses (shown as heights in a table) of the resistance card can be set, and multiple measurements and comparisons are performed, so that the test result is accurate and effective. As shown in fig. 2, in the table, the mean value point is linearly fitted by using the least square method, and the confidence interval and the dispersion interval of the power frequency discharge voltage of the arrester under different conditions are subsequently calculated by referring to the calculation method in the prior art, so that the relevant flashover characteristics of the arrester can be more accurately and effectively tested.

According to the lightning arrester resistor sheet side glaze discharge test system provided by the embodiment of the invention, through combining the specific variable frequency power supply, the transformer, the reactor module, the voltage divider, the peak voltage meter and the resistor sheet module, and simultaneously, the reactor module adopts the series reactor, the short-circuit current can be effectively limited, the short-circuit current is prevented from influencing the voltage drop in the circuit, and further the detection of the lightning arrester resistor sheet side glaze voltage flashover characteristic is influenced, so that the whole lightning arrester resistor sheet side glaze discharge test system can effectively test the flashover characteristics of lightning arresters under different working conditions, the circuit topology structure is simple, and the test result is accurate and effective.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.