CN219266467U

CN219266467U - Online monitoring device for opening of circuit breaker

Info

Publication number: CN219266467U
Application number: CN202222890507.1U
Authority: CN
Inventors: 李�瑞; 艾广宁; 王海涛; 张广跃; 王彦明; 宋东海; 缪弼东; 张玉平; 周启斌; 刘建华; 宋博; 崔超; 齐佳风; 白丽钊; 李�浩; 郭云雷; 贺杰; 高鑫; 张涛; 贾晨光
Original assignee: Third Engineering Co Ltd of China Railway Electrification Engineering Group Co Ltd
Current assignee: Third Engineering Co Ltd of China Railway Electrification Engineering Group Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-06-27
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to the technical field of circuit breaker on-line monitoring, in particular to an on-line monitoring device for opening a circuit breaker, which has the technical scheme that: the combined circuit breaker comprises a combined circuit breaker module, wherein a brake separating coil and a brake closing coil are arranged in the combined circuit breaker module, a double-arm movable connecting rod is arranged on the combined circuit breaker module, the combined circuit breaker module is connected in series in a high-voltage cable, and the high-voltage cable comprises a T-pole cable and an F-pole cable; one side of the combined breaker module is provided with a detection mechanism, and the detection mechanism comprises a pressure detection module, a parameter detection module and a terminal module; the pressure detection module comprises a pressure sensor; the parameter detection module comprises a T pole detector and an F pole detector, wherein the T pole detector is used for detecting voltage and current on a T pole cable, and the F pole detector is used for detecting voltage and current on an F pole cable.

Description

Online monitoring device for opening of circuit breaker

Technical Field

The utility model relates to the technical field of on-line monitoring of circuit breakers, in particular to an on-line monitoring device for opening of a circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the application range, and the division of a high-voltage boundary line and a low-voltage boundary line is fuzzy, and is generally called as a high-voltage electrical appliance with the voltage of more than 3 kV.

There are many kinds of switches in the railway traction power supply system, in which the breaker is matched with the relay protection device to cut off the effect of the extremely large fault current, and the fault that the switching-on/off coil burns out due to the fact that the switching-on/off speed of the breaker does not reach the standard often occurs in operation, so the mechanical index test of the contact on/off time affecting the most important index, namely the arc extinguishing performance, is extremely important. However, in actual operation, 27.5kV equipment of a high-speed railway mostly adopts a GIS combined electrical appliance, and under the structure, the switching characteristic test of the circuit breaker cannot be performed in a conventional manner, so that other manners are needed to be adopted for verification.

By adopting the test auxiliary contact time, the test method cannot completely represent the action time of the breaker contact per se, cannot obtain the synchronous quantity of the T phase and the F phase, and the test of the closing bounce which is another important physical quantity is very difficult to realize, and even cannot obtain data, so the application discloses an on-line monitoring device for the opening of the breaker.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an on-line monitoring device for opening a circuit breaker.

The technical scheme adopted for solving the technical problems is as follows:

the on-line monitoring device for opening the circuit breaker comprises a combined circuit breaker module, wherein a breaking coil and a closing coil are arranged in the combined circuit breaker module, a double-arm movable connecting rod is arranged on the combined circuit breaker module, the combined circuit breaker module is connected in series in a high-voltage cable, and the high-voltage cable comprises a T-pole cable and an F-pole cable;

one side of the combined circuit breaker module is provided with a detection mechanism, the detection mechanism comprises a pressure detection module for detecting the change of the double-arm movable connecting rod, a parameter detection module for detecting the parameter change of the high-voltage cable, and a terminal module for performing data processing on the parameter detection module of the pressure detection module;

the pressure detection module comprises a pressure sensor, wherein the pressure sensor is used for detecting a transformation parameter signal of a double-arm movable connecting rod in the circuit breaker;

the parameter detection module comprises a T-pole detector and an F-pole detector, wherein the T-pole detector is used for detecting voltage and current on a T-pole cable, and the F-pole detector is used for detecting voltage and current on an F-pole cable.

Preferably, the T-pole detector comprises a T-pole through current transformer, a T-pole voltage transformer and a T-pole leakage current transformer, and detects the generation or disappearance of voltage and current on a T-pole cable.

Preferably, the F-pole detector comprises an F-pole through current transformer, an F-pole voltage transformer and an F-pole leakage current transformer, and detects the generation or disappearance of voltage and current on an F-pole cable;

the terminal module comprises a server for data processing and a transmission unit for transmitting detection signals of the T pole detector and the F pole detector.

Preferably, the transmission unit is configured as a wireless transmission unit, and a storage unit for storing detection data is disposed in the server.

Preferably, the detection mechanism further comprises a display unit, and the display unit displays and processes the data processing result of the processor.

The utility model has the beneficial effects that: the starting condition of starting by taking the change of the voltages at two sides of the opening coil and the closing coil as a criterion is as follows: collecting the current generation or disappearance in the primary high-voltage cable as a termination condition, and taking a fracture as a bouncing value; collecting the auxiliary contact change time of a breaker opening and closing signal; taking leakage current or ground voltage change of the lightning arrester as a termination condition, and taking a fracture as a bouncing value; taking the voltage waveform of the feeder line side voltage transformer as a termination condition and taking a fracture as a bouncing value; under the conditions of not interfering with the normal operation of the electrical equipment and not interfering with daily inspection and maintenance, the detection mode of collecting data without contacting the electrical equipment is adopted to rapidly and effectively detect the parameters of the circuit breaker.

Drawings

Fig. 1 is a schematic diagram of a characteristic test collection of a combined electrical apparatus breaker according to an embodiment of the present application;

fig. 2 is an overall schematic diagram of a detection mechanism according to an embodiment of the present application.

1, combining a breaker module; 11. a brake-separating coil; 12. a closing coil; 21. a T-pole cable; 22. f pole cable; 3. a detection mechanism; 31. a pressure detection module; 311. a pressure sensor; 32. a parameter detection module; 33. a terminal module; 331. a server; 332. a transfer unit; 333. a storage unit; 334. a display unit; 41. a T pole detector; 42. a T-pole through current transformer; 43. a T-pole voltage transformer; 44. a T-pole leakage current transformer; 51. an F-pole detector; 52. f pole through current transformer; 53. an F pole voltage transformer; 54. f pole leakage current transformer.

Detailed Description

The present utility model will be described in further detail with reference to the following examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Examples:

referring to fig. 1, an on-line monitoring device for opening a circuit breaker is disclosed for the application, and comprises a combined circuit breaker module 1, wherein a breaking coil 11 and a closing coil 12 are arranged in the combined circuit breaker module 1, a double-arm movable connecting rod is arranged on the combined circuit breaker module 1, the combined circuit breaker module 1 is connected in series in a high-voltage cable, and the high-voltage cable comprises a T-pole cable 21 and an F-pole cable 22; one side of the combined circuit breaker module 1 is provided with a detection mechanism 3, and the detection mechanism 3 comprises a pressure detection module 31 for detecting the change of a double-arm movable connecting rod, a parameter detection module 32 for detecting the change of a high-voltage cable parameter, and a terminal module 33 for performing data processing on the parameter detection module 32 of the pressure detection module 31.

Referring to fig. 1 and 2, the pressure detection module 31 includes a pressure sensor 311, and the pressure sensor 311 is used to detect a transformation parameter signal of a double-arm moving link in the circuit breaker; the pressure sensor 311 is used for monitoring the change amount of the double-arm movable connecting rod in the breaker operating mechanism to carry out auxiliary measurement, and the mechanical shake amount is taken as a bouncing value.

The parameter detection module 32 includes a T-pole detector 41 and an F-pole detector 51, the T-pole detector 41 is configured to detect a voltage and a current on the T-pole cable 21, and the F-pole detector 51 is configured to detect a voltage and a current on the F-pole cable 22. The T-pole detector 41 includes a T-pole through current transformer 42, a T-pole voltage transformer 43, and a T-pole leakage current transformer 44, and the T-pole detector 41 detects the occurrence or disappearance of the voltage current on the T-pole cable 21. The F-pole detector 51 includes an F-pole through current transformer 52, an F-pole voltage transformer 53, and an F-pole leakage current transformer 54, and the F-pole detector 51 detects the occurrence or disappearance of the voltage current on the F-pole cable 22.

The terminal module 33 includes a server 331 for performing data processing, and also includes a transmission unit 332 for transmitting detection signals of the T-pole detector 41 and the F-pole detector 51. The transmission unit 332 is provided as a wireless transmission unit, and a storage unit 333 for storing detection data is provided in the server 331. The detection mechanism 3 further includes a display unit 334, and the display unit 334 performs display processing on the data processing result of the processor.

The implementation principle of the embodiment is as follows: the starting condition of starting the voltage change on both sides of the opening coil 11 and the closing coil 12 is as a criterion: collecting the current generation or disappearance in the primary high-voltage cable as a termination condition, and taking a fracture as a bouncing value; collecting the auxiliary contact change time of a breaker opening and closing signal; taking leakage current or ground voltage change of the lightning arrester as a termination condition, and taking a fracture as a bouncing value; the voltage waveform of the feeder line side voltage transformer is used as a termination condition, and the fracture is used as a bouncing value. The detected data is stored in the server 331 through the transmission unit 332, the storage period is one life cycle of the device, real-time online transmission and alarming are performed through the 5G internet of things, meanwhile, an information center and a mobile phone terminal are arranged, and the information center and the mobile phone terminal are utilized to check real-time data and historical records.

The above embodiments should not limit the present utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present utility model.

Claims

1. An on-line monitoring device for opening a circuit breaker, which is characterized in that: the combined circuit breaker comprises a combined circuit breaker module (1), wherein a breaking coil (11) and a closing coil (12) are arranged in the combined circuit breaker module (1), a double-arm movable connecting rod is arranged on the combined circuit breaker module (1), the combined circuit breaker module (1) is connected in series in a high-voltage cable, and the high-voltage cable comprises a T-pole cable (21) and an F-pole cable (22);

one side of the combined circuit breaker module (1) is provided with a detection mechanism (3), the detection mechanism (3) comprises a pressure detection module (31) for detecting the change of a double-arm movable connecting rod, a parameter detection module (32) for detecting the change of a high-voltage cable parameter, and a terminal module (33) for processing data of the parameter detection module (32) of the pressure detection module (31);

the pressure detection module (31) comprises a pressure sensor (311), wherein the pressure sensor (311) is used for detecting a transformation parameter signal of a double-arm movable connecting rod in the circuit breaker;

the parameter detection module (32) comprises a T-pole detector (41) and an F-pole detector (51), wherein the T-pole detector (41) is used for detecting voltage and current on a T-pole cable (21), and the F-pole detector (51) is used for detecting voltage and current on an F-pole cable (22).

2. The on-line monitoring device for a circuit breaker opening of claim 1, wherein: the T-pole detector (41) comprises a T-pole through current transformer (42), a T-pole voltage transformer (43) and a T-pole leakage current transformer (44), and the T-pole detector (41) detects the generation or disappearance of voltage and current on the T-pole cable (21).

3. The on-line monitoring device for a circuit breaker opening of claim 2, wherein: the F pole detector (51) comprises an F pole through current transformer (52), an F pole voltage transformer (53) and an F pole leakage current transformer (54), and the F pole detector (51) detects the generation or disappearance of voltage current on an F pole cable (22);

the terminal module (33) includes a server (331) for performing data processing, and further includes a transmission unit (332) for transmitting detection signals of the T-pole detector (41) and the F-pole detector (51).

4. An on-line monitoring device for a circuit breaker opening as claimed in claim 3, wherein: the transmission unit (332) is configured as a wireless transmission unit, and a storage unit (333) for storing detection data is arranged in the server (331).

5. The on-line monitoring device for a circuit breaker opening of claim 4, wherein: the detection mechanism (3) further comprises a display unit (334), and the display unit (334) displays and processes the data processing result of the processor.