Defect test and test platform for power transmission line

Abstract

The utility model relates to a defect test and test platform for a power transmission line, and belongs to the field of power transmission line tests. According to the technical scheme, the device comprises a boosting unit, a current boosting unit and a defect testing unit, the defect testing unit comprises a first testing unit and a second testing unit, the boosting unit is connected with one end of the first testing unit through a first cable terminal, and the other end of the first testing unit is connected with one end of the second testing unit through a second cable terminal; the other end of the second test unit is connected with one end of the current boosting unit through a third cable terminal, and the other end of the current boosting unit is connected with the voltage boosting unit through a fourth cable terminal. Through the arrangement of the first test unit and the second test unit, tests of two different defects can be carried out at the same time, and the test time can be shortened during teaching and tests.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of transmission line test, concretely relates to a kind of defect test and test platform for transmission line. BACKGROUND

[0002] In the long-term operation process, transmission line will inevitably be influenced by multiple complex factors, including the continuous effect of electric field effect, thermal effect caused by current passing, mechanical stress from wind and its own weight, corrosion effect caused by chemical substances in the air, and variable natural environmental conditions, such as extreme weather. The combined effect of these factors makes transmission line prone to various defects, thereby affecting its normal operation and the stability of power supply.

[0003] In the operation and management of power system, real and effective simulation test platform is the basis for exploring the mechanism of transmission line defects, testing the effectiveness of various detection methods and evaluating the state of transmission line. Defect simulation of transmission line is a crucial work, which can be used in training and education field to help operation personnel better understand the operating characteristics and defect handling methods of the line, and improve their professional skills and response ability.

[0004] Currently, most defect simulation simulation platforms can only simulate one type of defect, and need to be reassembled and installed when the simulated defect is replaced each time. Although this method can also achieve simulation of multiple defects, the process of hoisting and frequent disassembly of defect modules increases the test time in actual operation. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of defect test and test platform for transmission line to solve the problem of increasing test time caused by hoisting back and forth, frequent disassembly process in realizing the simulation of multiple defects in the defect simulation simulation platform of prior art.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The application provides a defect test and test platform for a power transmission line, which comprises a voltage boosting unit, a current boosting unit and a defect test unit, the defect test unit comprises a first test unit and a second test unit, the voltage boosting unit is connected with one end of the first test unit through a first cable terminal, the other end of the first test unit is connected with one end of the second test unit through a second cable terminal, the other end of the second test unit is connected with one end of the current boosting unit through a third cable terminal, and the other end of the current boosting unit is connected with the voltage boosting unit through a fourth cable terminal. The first test unit and the second test unit are arranged, so that the test of two different defects can be simultaneously performed, and the test time can be shortened during teaching and testing.

[0008] Further, the first test unit and the second test unit each comprise a first switching line, a second switching line, a comparison line and at least two line stations, the line station is used for placing a defect line to be tested, and the first switching line and the second switching line are used for simultaneously connecting two ends of the comparison line or the defect line. The comparison line and the at least two line stations for placing the defect line to be tested are arranged, so that when the defect line is replaced, the replacement of the defect line can be completed by only replacing the positions of the first switching line and the second switching line, and the test time is further reduced.

[0009] Further, the first test unit is a cable defect test unit, the first switching line, the second switching line and the comparison line in the first test unit each adopt a cable with the same performance, and the line station in the first test unit is used for placing a defect cable.

[0010] Further, the second test unit is an overhead line defect test unit, the second test unit further comprises a plurality of insulating poles, the insulating poles are provided with a plurality of cross arms with different heights, the cross arms are used for placing the comparison line or are used as line stations to place the defect line, the first switching line, the second switching line and the comparison line in the second test unit each adopt an overhead line with the same performance, and the line station in the second test unit is used for placing a defect overhead line.

[0011] Further, the defect test and test platform further comprises a test unit, the test unit comprises a test station, the test station is used for placing a cable to be tested, one end of the test station is connected with the voltage boosting unit through a fifth cable terminal, and the other end of the test station is connected with the current boosting unit through a sixth cable terminal. The test unit is arranged, so that the voltage resistance and thermal stability test of the cable can be performed through the voltage boosting unit and the current boosting unit without teaching and testing, and the use efficiency of the platform is improved.

[0012] Further, the first cable terminal, the fourth cable terminal and the fifth cable terminal are respectively provided with a first isolation switch, a second isolation switch and a third isolation switch between the first cable terminal, the fourth cable terminal and the fifth cable terminal and the voltage boosting unit.

[0013] From the above technical solutions, the utility model has following advantages: through the first test unit and the second test unit, two different defects can be tested at the same time, and the test time can be shortened during teaching and testing. Through the comparison line and the line work station of the at least two defect lines to be tested, the defect line can be replaced by only changing the positions of the first switching line and the second switching line, further reducing the test time. Through the test unit, the cable withstand voltage and thermal stability test can be performed by the voltage boosting unit and the current boosting unit without teaching and testing, improving the use efficiency of the platform. Through the first isolation switch, the second isolation switch and the third isolation switch, the working mode can be quickly switched on the platform. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the utility model, the following will be briefly introduced the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0015] Figure 1 It is the structure schematic view of the embodiment in the specific embodiment of the utility model.

[0016] Figure 2 It is the structure schematic view of the insulating pole in the embodiment of the specific embodiment of the utility model.

[0017] Figure 3 It is the structure schematic view of the second test unit in the comparison line in the embodiment of the specific embodiment of the utility model.

[0018] Figure 4 It is the structure schematic view of the second test unit in the defect overhead line in the embodiment of the specific embodiment of the utility model.

[0019] In the figure: 1, voltage boosting unit; 2, current boosting unit; 3, first test unit; 4, second test unit; 5, first cable terminal; 6, second cable terminal; 7, third cable terminal; 8, fourth cable terminal; 9, first switching line; 10, second switching line; 11, comparison line; 12, line station; 13, insulating pole; 14, cross arm; 15, test station; 16, fifth cable terminal; 17, sixth cable terminal; 18, first disconnecting switch; 19, second disconnecting switch; 20, third disconnecting switch. DETAILED DESCRIPTION

[0020] In the following detailed description, various embodiments of the disclosure will be more fully described. The disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit various embodiments of the disclosure to the specific embodiments disclosed herein, but the disclosure should be understood to encompass all adjustments, equivalents, and / or alternatives falling within the spirit and scope of various embodiments of the disclosure.

[0021] In various embodiments of the disclosure, the expression "or" or "at least one of A or / and B" includes any combination of the listed terms or all combinations thereof. For example, the expression "A or B" or "at least one of A or / and B" can include A, can include B, or can include both A and B.

[0022] The expressions used in various embodiments of the disclosure, such as "first", "second", etc., can modify various constituent elements in various embodiments, but can not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the disclosure, a first element can be referred to as a second element, and likewise, a second element can be referred to as a first element.

[0023] To better understand the content of the present scheme, the following explains some nouns in the present scheme:

[0024] 1. GIS, which stands for Gas Insulated Switchgear, is a gas-insulated metal-enclosed switchgear. It is a high-voltage power distribution device composed of circuit breakers, busbars, disconnectors, voltage transformers, current transformers, arresters, bushings, and other high-voltage electrical components. These components are enclosed in a metal shell filled with a certain pressure of sulfur hexafluoride (SF6) gas, which serves as an insulating and arc-extinguishing medium, and has excellent insulation and arc-extinguishing performance.

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0026] As shown in Figure 1 The present embodiment provides a defect test and test platform for power transmission line, which comprises a voltage boosting unit 1, a current boosting unit 2 and a defect test unit, the defect test unit comprises a first test unit 3 and a second test unit 4, the voltage boosting unit 1 is connected with one end of the first test unit 3 through a first cable terminal 5, the other end of the first test unit 3 is connected with one end of the second test unit 4 through a second cable terminal 6, the other end of the second test unit 4 is connected with one end of the current boosting unit 2 through a third cable terminal 7, and the other end of the current boosting unit 2 is connected with the voltage boosting unit 1 through a fourth cable terminal 8. The first test unit 3 and the second test unit 4 are arranged, so that the test of two different defects can be simultaneously performed, and the test time can be shortened during teaching and testing.

[0027] In the present embodiment, the defect test and test platform further comprises a test unit, the test unit comprises a test station 15, the test station 15 is used for placing a cable to be tested, one end of the test station 15 is connected with the voltage boosting unit 1 through a fifth cable terminal 16, and the other end of the test station 15 is connected with the current boosting unit 2 through a sixth cable terminal 17. The test unit is arranged, so that the voltage resistance and thermal stability test of the cable can be performed through the voltage boosting unit 1 and the current boosting unit 2 without teaching and testing, and the use efficiency of the platform is improved.

[0028] In the present embodiment, the first cable terminal 5, the fourth cable terminal 8 and the fifth cable terminal 16 are respectively provided with a first disconnector 18, a second disconnector 19 and a third disconnector 20. The first disconnector 18, the second disconnector 19 and the third disconnector 20 are arranged, so that the switching of the working mode on the platform can be conveniently and quickly performed. When the defect test on the first test unit 3 and the second test unit 4 is performed, the first disconnector 18 and the second disconnector 19 are connected, and the third disconnector 20 is disconnected. When the test of the test unit is performed, the first disconnector 18 is disconnected, and the second disconnector 19 and the third disconnector 20 are connected.

[0029] The voltage boosting unit 1 can provide 127kV voltage for the platform by using a test transformer or other voltage boosting device with continuously adjustable output voltage, the first disconnector 18, the second disconnector 19 and the third disconnector 20 are GIS devices, SF6 gas in the GIS device is non-combustible and non-explosive inert gas, so the GIS is an explosion-proof device, which improves the safety in high voltage environment; the current boosting unit 2 is installed in series by four groups of cross-core current boosters, which provides 1500A current in test environment and 4000A current in test environment.

[0030] In the embodiment, the first test unit 3 and the second test unit 4 each include a first switching line 9, a second switching line 10, a comparison line 11 and at least two line workstations 12 for placing the defect lines to be tested, the first switching line 9 and the second switching line 10 are used to connect two ends of the comparison line 11 or the defect lines at the same time, so that when the defect lines are replaced, only the positions of the first switching line 9 and the second switching line 10 need to be replaced to complete the replacement of the defect lines, further reducing the test time.

[0031] In the embodiment, the first test unit 3 is a cable defect test unit, the first switching line 9, the second switching line 10 and the comparison line 11 in the first test unit 3 each use a cable with the same performance, and the line workstations 12 in the first test unit 3 are used to place the defect cables.

[0032] In the embodiment, as shown in Figures 2-4 the second test unit 4 is an overhead line defect test unit, the second test unit 4 further includes a plurality of insulating poles 13, the insulating poles 13 are provided with a plurality of cross arms 14 with different heights, the cross arms 14 are used to place the comparison line 11 or as the line workstations 12 to place the defect lines, the first switching line 9, the second switching line 10 and the comparison line 11 in the second test unit 4 each use an overhead line with the same performance, and the line workstations 12 in the second test unit 4 are used to place the defect overhead lines.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmission line defect test and measurement platform comprising a voltage boosting unit (1), a current boosting unit (2) and a defect test unit, characterized in that, The defect test unit comprises a first test unit (3) and a second test unit (4), the boosting unit (1) is connected with one end of the first test unit (3) through a first cable terminal (5), the other end of the first test unit (3) is connected with one end of the second test unit (4) through a second cable terminal (6), the other end of the second test unit (4) is connected with one end of the boosting unit (2) through a third cable terminal (7), and the other end of the boosting unit (2) is connected with the boosting unit (1) through a fourth cable terminal (8).

2. The transmission line defect testing and measurement platform of claim 1, wherein, The first test unit (3) and the second test unit (4) each comprise a first switching line (9), a second switching line (10), a comparison line (11) and at least two line workstations (12), the line workstations (12) are used for placing a defect line to be tested, and the first switching line (9) and the second switching line (10) are used for simultaneously connecting two ends of the comparison line (11) or the defect line.

3. The platform for testing and testing defects of power transmission lines according to claim 2, characterized in that, The first test unit (3) is a cable defect test unit, the first switching line (9), the second switching line (10) and the comparison line (11) in the first test unit (3) each adopt a cable with same performance, and the line workstations (12) in the first test unit (3) are used for placing a defect cable.

4. The transmission line defect testing and measurement platform of claim 2, wherein, The second test unit (4) is an overhead line defect test unit, the second test unit (4) further comprises a plurality of insulating poles (13), the insulating poles (13) are provided with a plurality of cross arms (14) with different heights, the cross arms (14) are used for placing the comparison line (11) or as the line workstations (12) for placing a defect line, the first switching line (9), the second switching line (10) and the comparison line (11) in the second test unit (4) each adopt an overhead line with same performance, and the line workstations (12) in the second test unit (4) are used for placing a defect overhead line.

5. The transmission line defect testing and measurement platform of claim 1, wherein, The defect test and test platform further comprises a test unit, the test unit comprises a test workstation (15), the test workstation (15) is used for placing a cable to be tested, one end of the test workstation (15) is connected with the boosting unit (1) through a fifth cable terminal (16), and the other end of the test workstation (15) is connected with the boosting unit (2) through a sixth cable terminal (17).

6. The transmission line defect testing and measurement platform of claim 5, wherein, The first cable terminal (5), the fourth cable terminal (8) and the fifth cable terminal (16) are respectively provided with a first isolation switch (18), a second isolation switch (19) and a third isolation switch (20) between the boosting unit (1).

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