An on-line monitoring device for circuit breaker and an on-line monitoring method thereof

Abstract

The application relates to the technical field of circuit breaker online monitoring, in particular to a circuit breaker opening online monitoring device and an online monitoring method thereof, and the technical scheme is as follows: a combined circuit breaker module is arranged, a tripping coil and a closing coil are arranged in the combined circuit breaker module, a double-arm moving 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; a detection mechanism is arranged on one side of the combined circuit breaker module, 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, the T-pole detector is used for detecting voltage and current on the T-pole cable, and the F-pole detector is used for detecting voltage and current on the F-pole cable; the application has the technical effects that all the circuit breakers in operation and without test conditions can be monitored conveniently, and the normal operation of electrical equipment is not disturbed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker online monitoring, in particular to a circuit breaker opening online monitoring device and an online monitoring method thereof. BACKGROUND

[0002] The circuit breaker refers to a switch device capable of closing, carrying and opening the current under normal loop conditions and capable of closing, carrying and opening the current under abnormal loop conditions within a specified time. The circuit breaker is divided into high-voltage circuit breakers and low-voltage circuit breakers according to its use range, and the high-low voltage boundary is relatively vague, and generally 3kV or above is referred to as high-voltage electrical appliances.

[0003] There are many kinds of switches in the railway traction power supply system, among which the circuit breaker needs to cooperate with the relay protection device to cut off the large fault current, and the breaking and closing coil is often burned due to the substandard breaking and closing speed of the circuit breaker during operation, thus affecting the mechanical index test of the contact breaking time, which is the most important indicator of arc extinguishing performance. However, in actual operation, the 27.5kV equipment of high-speed railway is mostly in the form of GIS combined electrical appliances, and under this structure, the circuit breaker switch characteristic test cannot be carried out in the conventional way, and therefore other methods need to be used for corroboration.

[0004] The test auxiliary contact point time is adopted, and this test method cannot completely represent the action time of the circuit breaker contact itself, cannot obtain the synchronization quantity of T and F two phases, and it is also extremely difficult to test another important physical quantity, i.e. closing bounce, and even data cannot be obtained, and therefore the present application discloses a circuit breaker opening online monitoring device and an online monitoring method thereof. SUMMARY

[0005] To solve the above technical problems, the present application provides a circuit breaker opening online monitoring device and an online monitoring method thereof.

[0006] The technical solution adopted by the present application to solve the technical problems is as follows:

[0007] A circuit breaker opening online monitoring device, comprising a combined circuit breaker module, a breaking coil and a closing coil are arranged in the combined circuit breaker module, a double-arm moving 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;

[0008] 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 moving connecting rod, further comprises a parameter detection module for detecting the parameter change of the high-voltage cable, and further comprises a terminal module for processing the data of the pressure detection module and the parameter detection module;

[0009] The pressure detection module comprises a pressure sensor for detecting a transformation parameter signal of a double-arm moving link within the circuit breaker.

[0010] The parameter detection module comprises a T-pole detector and an F-pole detector, 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.

[0011] 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 the T-pole detector detects generation or disappearance of voltage and current on the T-pole cable.

[0012] 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 the F-pole detector detects generation or disappearance of voltage and current on the F-pole cable.

[0013] The terminal module comprises a server for data processing, and further comprises a transmission unit for transmitting detection signals of the T-pole detector and the F-pole detector.

[0014] Preferably, the transmission unit is a wireless transmission unit, and the server is provided with a storage unit for storing detection data.

[0015] Preferably, the detection mechanism further comprises a display unit for displaying data processing results of the server.

[0016] An online monitoring method of a circuit breaker,

[0017] The method comprises a signal monitoring system and a parameter setting system, and the signal monitoring system performs online detection on detection parameters of a pressure detection module and a parameter detection module.

[0018] Signal acquisition one: current generation or disappearance in a high-voltage cable is acquired as a termination condition, and a port of the current generation or disappearance is used as a bounce value.

[0019] Signal acquisition two: voltage changes on both sides of a tripping coil and a closing coil are acquired as a starting condition for judgment of starting.

[0020] Signal acquisition three: a pressure detection module is used to acquire actions of a double-arm moving link within a combined circuit breaker module for auxiliary measurement, and mechanical shaking of the double-arm moving link is measured.

[0021] Signal acquisition four: a parameter detection module is used to detect current and current change of a high-voltage cable, and the current and the current change of the high-voltage cable are detected as a termination condition.

[0022] Signal transmission: the wireless transmission unit transmits the collected signal to the server, the server processes the collected signal data, and the detected data is stored in the storage unit;

[0023] Finally, the detection result is displayed in real time, which is convenient for the operator to monitor in real time.

[0024] Preferably, the parameter setting system comprises a communication setting interface, a sensor parameter setting interface and a cloud parameter interface, the communication setting interface modifies parameters of Modbus mode, address, baud rate, check bit and stop bit.

[0025] Preferably, the sensor parameter setting calibrates parameters of voltage and current sampling;

[0026] The cloud parameter interface comprises a server heartbeat interval interface and a server device serial number interface.

[0027] Advantages of the application: the change of the voltage on both sides of the opening coil and the closing coil is taken as the starting condition of the criterion: the generation or disappearance of the current in the high-voltage cable is taken as the termination condition, the fracture is taken as the bounce value; the auxiliary contact change time of the opening and closing signal of the circuit breaker is collected; the leakage current or ground voltage change of the arrester is taken as the termination condition, the fracture is taken as the bounce value; the voltage waveform of the feeder side voltage transformer is taken as the termination condition, the fracture is taken as the bounce value; without interfering with the normal operation of the electrical equipment and without interfering with the daily inspection and maintenance, the detection method of collecting data without contacting the electrical equipment is adopted to quickly and effectively detect the parameters of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram for collecting the characteristic test of the combined electrical circuit breaker of the embodiment of the application;

[0029] Figure 2 It is a schematic diagram of the detection mechanism of the embodiment of the application.

[0030] 1, combined circuit breaker module; 11, opening coil; 12, closing coil; 21, T-pole cable; 22, F-pole cable; 3, detection mechanism; 31, pressure detection module; 311, pressure sensor; 32, parameter detection module; 33, terminal module; 331, server; 332, transmission unit; 333, storage unit; 334, display unit; 41, T-pole detector; 42, T-pole through-current transformer; 43, T-pole voltage transformer; 44, T-pole leakage current transformer; 51, F-pole detector; 52, F-pole through-current transformer; 53, F-pole voltage transformer; 54, F-pole leakage current transformer. DETAILED DESCRIPTION

[0031] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0032] Example:

[0033] refer to Figure 1 This application discloses an online monitoring device for circuit breaker operation, including a combined circuit breaker module 1. The combined circuit breaker module 1 is provided with a tripping coil 11 and a closing coil 12. The combined circuit breaker module 1 is provided with a double-arm moving link. The combined circuit breaker module 1 is connected in series in a high-voltage cable, which includes a T-pole cable 21 and an F-pole cable 22. A detection mechanism 3 is provided on one side of the combined circuit breaker module 1. The detection mechanism 3 includes a pressure detection module 31 for detecting changes in the double-arm moving link, a parameter detection module 32 for detecting changes in the parameters of the high-voltage cable, and a terminal module 33 for processing data from the pressure detection module 31 and the parameter detection module 32.

[0034] refer to Figure 1 and Figure 2 The pressure detection module 31 includes a pressure sensor 311, which is used to detect the changing parameter signal of the double-arm moving link inside the circuit breaker; the pressure sensor 311 is used to monitor the change of the double-arm moving link inside the circuit breaker operating mechanism for auxiliary measurement, and the mechanical vibration is used as the bounce value.

[0035] The parameter detection module 32 includes a T-pole detector 41 and an F-pole detector 51. The T-pole detector 41 is used to detect the voltage and current on the T-pole cable 21, and the F-pole detector 51 is used to detect the voltage and current on the F-pole cable 22. The T-pole detector 41 includes a T-pole current transformer 42, a T-pole voltage transformer 43, and a T-pole leakage current transformer 44. The T-pole detector 41 detects the generation or disappearance of voltage and current on the T-pole cable 21. The F-pole detector 51 includes an F-pole current transformer 52, an F-pole voltage transformer 53, and an F-pole leakage current transformer 54. The F-pole detector 51 detects the generation or disappearance of voltage and current on the F-pole cable 22.

[0036] The terminal module 33 includes a server 331 for data processing and a transmission unit 332 for transmitting detection signals from the T-pole detector 41 and the F-pole detector 51. The transmission unit 332 is configured as a wireless transmission unit, and the server 331 includes a storage unit 333 for storing the detection data. The detection mechanism 3 also includes a display unit 334, which displays the data processing results from the server 331.

[0037] The implementation principle of this embodiment is as follows: The starting condition for initiation is the change in voltage across the trip coil 11 and the closing coil 12; the termination condition is the generation or disappearance of current in the primary high-voltage cable, with the break point as the bounce value; the time of change in the auxiliary contact of the circuit breaker's tripping and closing signals is collected; the termination condition is the change in leakage current or voltage to ground of the surge arrester, with the break point as the bounce value; the termination condition is the voltage waveform of the voltage transformer on the feeder side, with the break point as the bounce value. The detected data is stored in the server 331 via the transmission unit 332, with a storage period equal to one lifecycle of the device. Real-time online transmission and alarms are provided via 5G IoT. An information center and mobile terminal are also set up, allowing users to view real-time data and historical records using these devices.

[0038] refer to Figure 1 and Figure 2 :

[0039] This application also discloses an online monitoring method for circuit breaker opening.

[0040] It includes a signal monitoring system and a parameter setting system. The signal monitoring system performs online monitoring of the detection parameters of the pressure detection module 31 and the parameter detection module 32.

[0041] Signal Acquisition 1: Acquire the current generation or disappearance in the high-voltage cable as the termination condition, and use the port where the current generation or disappearance occurs as the bounce value;

[0042] Signal Acquisition 2: Acquire the voltage changes on both sides of the trip coil 11 and the closing coil 12 as the starting condition for determining the start-up;

[0043] Signal Acquisition 3: The pressure detection module 31 is used to collect the movement of the double-arm moving link in the combined circuit breaker module 1 for auxiliary measurement, and the mechanical jitter of the double-arm moving link is measured.

[0044] Signal Acquisition 4: The current and current change of the high-voltage cable are detected by the parameter detection module 32, and the detection of the current and current change in the high-voltage cable is used as the termination of the adjustment.

[0045] Signal transmission: The wireless transmission unit transmits the collected signals to the server 331. The server 331 processes the collected signals and stores the detected data in the storage unit 333.

[0046] Finally, the test results are displayed in real time, facilitating real-time monitoring by operators.

[0047] The parameter setting system includes a communication setting interface, a sensor parameter setting interface, and a cloud parameter interface. The communication setting interface allows modification of parameters such as Modbus mode, address, baud rate, parity bit, and stop bits. The sensor parameter setting calibrates the sampling parameters for voltage and current. The cloud parameter interface includes a server 331 heartbeat interval interface and a server 331 device serial number interface.

[0048] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. An online monitoring device for circuit breaker opening, characterized in that: The circuit breaker module (1) includes a tripping coil (11) and a closing coil (12) inside the circuit breaker module (1). The circuit breaker module (1) is equipped with a double-arm moving link. The circuit breaker module (1) is connected in series in a high-voltage cable. The high-voltage cable includes a T-pole cable (21) and an F-pole cable (22). The combined circuit breaker module (1) is provided with a detection mechanism (3) on one side. The detection mechanism (3) includes a pressure detection module (31) for detecting changes in the double-arm moving linkage, a parameter detection module (32) for detecting changes in high-voltage cable parameters, and a terminal module (33) for processing data from the pressure detection module (31) and the parameter detection module (32). The pressure detection module (31) includes a pressure sensor (311), which is used to detect the changing parameter signal of the double-arm moving link inside the circuit breaker. The parameter detection module (32) includes a T-pole detector (41) and an F-pole detector (51). The T-pole detector (41) is used to detect the voltage and current on the T-pole cable (21), and the F-pole detector (51) is used to detect the voltage and current on the F-pole cable (22). The T-pole detector (41) includes a T-pole through-hole current transformer (42), a T-pole voltage transformer (43), and a T-pole leakage current transformer (44). The T-pole detector (41) detects the generation or disappearance of voltage and current on the T-pole cable (21). The F-pole detector (51) includes an F-pole through-hole current transformer (52), an F-pole voltage transformer (53), and an F-pole leakage current transformer (54). The F-pole detector (51) detects the generation or disappearance of voltage and current on the F-pole cable (22). The terminal module (33) includes a server (331) for data processing and a transmission unit (332) for transmitting detection signals from the T-pole detector (41) and the F-pole detector (51).

2. The online monitoring device for circuit breaker opening according to claim 1, characterized in that: The transmission unit (332) is configured as a wireless transmission unit, and the server (331) is provided with a storage unit (333) for storing detection data.

3. The online monitoring device for circuit breaker opening according to claim 2, characterized in that: The detection mechanism (3) further includes a display unit (334), which displays the data processing results of the server (331).

4. An online monitoring method for circuit breaker opening, comprising the online monitoring device for circuit breaker opening as described in any one of claims 1-3, characterized in that: It includes a signal monitoring system and a parameter setting system. The signal monitoring system performs online detection of the detection parameters of the pressure detection module (31) and the parameter detection module (32). Signal Acquisition 1: Acquire the current generation or disappearance in the high-voltage cable as the termination condition, and use the port where the current generation or disappearance occurs as the bounce value; Signal Acquisition 2: Acquire the voltage changes on both sides of the trip coil (11) and the closing coil (12) as the starting condition for determining the start-up; Signal Acquisition 3: The pressure detection module (31) is used to collect the movement of the double-arm moving link in the combined circuit breaker module (1) for auxiliary measurement, and the mechanical jitter of the double-arm moving link is measured. Signal Acquisition 4: The current and current change of the high-voltage cable are detected by the parameter detection module (32) to detect the current and current change in the high-voltage cable as the termination adjustment; Signal transmission: The wireless transmission unit transmits the collected signal to the server (331), the server (331) processes the collected signal and stores the detected data in the storage unit (333). Finally, the test results are displayed in real time, facilitating real-time monitoring by operators.

5. The online monitoring method for circuit breaker opening according to claim 4, characterized in that: The parameter setting system includes a communication setting interface, a sensor parameter setting interface, and a cloud parameter interface. The communication setting interface allows modification of parameters such as Modbus mode, address, baud rate, parity bit, and stop bits.

6. The online monitoring method for circuit breaker opening according to claim 5, characterized in that: Sensor parameter settings calibrate the sampling parameters for voltage and current. The cloud parameter interface includes a server (331) heartbeat interval interface and a server (331) device serial number interface.

Images