Wireless inspection equipment and inspection method for high-voltage bushing insulation monitoring device

Abstract

The invention relates to the technical field of power grid maintenance, in particular to a wireless inspection device and method for a high-voltage bushing insulation monitoring device, and the method comprises the following steps: obtaining the current working parameters of the high-voltage bushing insulation monitoring device; judging whether the high-voltage bushing insulation monitoring device is in a suspicious state or not according to the current working parameters; applying a group of standard excitation signals to the high-voltage bushing insulation monitoring device in the suspicious state; acquiring a response signal of the high-voltage bushing insulation monitoring device for the standard excitation signal; and judging whether the response signal of the high-voltage bushing insulation monitoring device is matched with the standard excitation signal or not. According to the embodiment of the application, the current working state of the high-voltage bushing insulation monitoring device can be known in real time by monitoring the high-voltage bushing insulation monitoring device in real time, and an operator does not need to climb to detect, so that the detection efficiency of the high-voltage bushing insulation monitoring device is remarkably improved, and the detection cost is reduced. And real-time detection of the monitoring device during working is realized.

Description

Technical Field

[0001] The present application relates to the technical field of power grid maintenance, and in particular to a wireless inspection device and an inspection method for a high-voltage bushing insulation monitoring device. Background Art

[0002] At present, the high-voltage bushings of large oil-filled equipment such as transformers and high-voltage reactors are the weak link in insulation. In recent years, many accidents of large oil-filled equipment have occurred due to insulation problems inside the bushings. Therefore, a large number of high-voltage bushings are currently installed with bushing insulation online monitoring devices, which monitor the bushing insulation conditions by observing changes in the end-screen leakage current.

[0003] However, there is no effective on-site inspection method for the installation and commissioning quality of the newly-arrived casing online monitoring device, as well as the performance test after long-term operation. In addition, the device sensors are installed compactly and at a high position, which also increases the difficulty of on-site inspection work.

[0004] Therefore, it is necessary to design a wireless inspection device and inspection method for high-voltage bushing insulation monitoring device to solve the problem that personnel cannot climb up to conduct on-site inspections when the main equipment is energized, while ensuring regular on-site inspections of the operating performance of the bushing insulation monitoring device. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present application provides a wireless inspection device and an inspection method for a high-voltage bushing insulation monitoring device. By performing real-time monitoring on the high-voltage bushing insulation monitoring device, the current working status of the high-voltage bushing insulation monitoring device can be understood in real time without the need for operators to perform height-based inspections. This significantly improves the inspection efficiency of the high-voltage bushing insulation monitoring device and realizes real-time inspection of the monitoring device while it is working.

[0006] The above application objectives of this application are achieved through the following technical solutions: A wireless inspection method for a high-voltage bushing insulation monitoring device comprises the following steps: Obtain the current working parameters of the high-voltage bushing insulation monitoring device; Determine whether the high-voltage bushing insulation monitoring device is in a suspicious state according to the current working parameters; Applying a set of standard excitation signals to the high-voltage bushing insulation monitoring device in a suspicious state; Obtaining a response signal of a high-voltage bushing insulation monitoring device to a standard excitation signal; Determine whether the response signal of the high-voltage bushing insulation monitoring device matches the standard excitation signal; Determine whether the status of the high-voltage bushing insulation monitoring device is normal.

[0007] Optionally, obtaining the current working parameters of the high-voltage bushing insulation monitoring device includes: Get the current monitoring value of the high-voltage bushing monitoring device; Get the duration of the current monitoring value of the high voltage bushing monitoring device.

[0008] Optionally, judging whether the high-voltage bushing insulation monitoring device is in a suspicious state includes: Determine whether the current monitoring value of the high-voltage bushing monitoring device exceeds the permitted range; Determine whether the duration of the current monitoring value of the high-voltage bushing detection device exceeds the permitted range.

[0009] The embodiment of the present application also provides a wireless inspection device for a high-voltage bushing insulation monitoring device. The inspection device is installed on the high-voltage bushing insulation monitoring device. The inspection device is used to detect the current working state of the high-voltage bushing insulation monitoring device. The inspection device includes: A detection unit and a remote control unit, wherein the detection unit communicates wirelessly with the remote control unit; The detection unit includes a generator and a transmitter of an excitation signal, and a power supply for powering the generator and the transmitter. The generator is electrically connected to the transmitter, and the transmitter passes through the through-core current transformer of the high-voltage bushing insulation monitoring device, and the transmitter does not contact the high-voltage bushing test line.

[0010] Optionally, the transmitter is a detection line, and the detection line is electrically connected to the generator.

[0011] Optionally, both the remote control unit and the detection unit have wireless antennas, and the remote control unit and the detection unit communicate wirelessly via the wireless antennas.

[0012] Optionally, the power supply for the detection unit is a solar power supply.

[0013] In summary, this application has the following beneficial technical effects: The embodiment of the present application is to monitor the high-voltage bushing insulation monitoring device in real time, so as to understand the current working status of the high-voltage bushing insulation monitoring device in real time, without the need for operators to climb up to perform inspections, thereby significantly improving the inspection efficiency of the high-voltage bushing insulation monitoring device and realizing real-time inspection of the monitoring device when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a wireless inspection device for a high-voltage bushing insulation monitoring device of the present application; Figure numerals: 10, detection unit; 11, generator; 12, transmitter; 13, power supply; 14, wireless antenna; 20, remote control unit. DETAILED DESCRIPTION

[0015] The present application is further described in detail below in conjunction with the accompanying drawings.

[0016] The present application provides a wireless inspection method for a high-voltage bushing insulation monitoring device, comprising the following steps: S101, obtaining the current working parameters of the high-voltage bushing insulation monitoring device when monitoring the high-voltage bushing end screen capacitance; S102, judging whether the high-voltage bushing insulation monitoring device is in a suspicious state according to the current working parameters, that is, judging whether the high-voltage bushing insulation monitoring device is in a state where a fault may occur according to the current working parameters; S103, applying a set of standard excitation signals to the high-voltage bushing insulation monitoring device in a suspicious state; S104, obtaining a response signal of the high-voltage bushing insulation monitoring device to a standard excitation signal; S105, judging whether the response signal of the high-voltage bushing insulation monitoring device matches the standard excitation signal; S106. Determine whether the status of the high-voltage bushing insulation monitoring device is normal.

[0017] The following is a further introduction based on specific usage scenarios.

[0018] First, step S101 is performed to obtain the working parameters of the high-voltage bushing insulation monitoring device at the current moment when monitoring the high-voltage bushing end screen capacitance, which may include the current monitoring value of the monitoring device and the duration of the current monitoring value. The duration of the current monitoring value should be understood as the duration of the indication of the current monitoring device. The indication of the aforementioned monitoring device may be a range value. Then, step S102 is performed to determine whether the high-voltage bushing insulation monitoring device is in a suspicious state according to the current working parameters of the monitoring device when monitoring the high-voltage bushing end screen capacitor, that is, to determine whether the high-voltage bushing insulation monitoring device is in a state where a failure may occur according to the current working parameters. The judgment criteria may be: Determine whether the current monitoring value of the high-voltage bushing monitoring device exceeds the permitted range of the capacitance indication value of the high-voltage bushing end screen, and determine whether the duration of the current monitoring value of the high-voltage bushing detection device exceeds the permitted range. When the current monitoring value of the high-voltage bushing monitoring device exceeds the permitted range of the capacitance indication value of the high-voltage bushing end screen, or when the duration of the current monitoring value of the monitoring device exceeds the permitted range, determine that the high-voltage bushing monitoring device is in a suspicious state; In step S103, a set of standard excitation signals is applied to the high-voltage bushing insulation monitoring device in a suspicious state, which can be applied remotely by wireless signal transmission; Then, step S104 is executed to obtain a response signal of the high-voltage bushing insulation monitoring device to the standard excitation signal of step S103; In step S105, the acquired response signal of the monitoring device to the standard excitation signal is compared with the response signal under the standard state to check whether the indication and waveform of the response signal of the monitoring device are consistent with the response signal under the standard state; In step S106, when the response signal of the monitoring device to the standard excitation signal does not match the response signal under the standard state, it is determined that the current high-voltage bushing insulation monitoring device has a fault; when the response signal of the monitoring device to the standard excitation signal matches the response signal under the standard state, it is determined that the current high-voltage bushing insulation monitoring device is in a normal working state.

[0019] In general, the embodiment of the present application can understand the current working status of the high-voltage bushing insulation monitoring device in real time by performing real-time monitoring on the high-voltage bushing insulation monitoring device, without the need for operators to climb up to perform inspections, thereby significantly improving the detection efficiency of the high-voltage bushing insulation monitoring device and realizing real-time detection of the monitoring device while it is working.

[0020] The embodiment of the present application also provides a wireless inspection device for a high-voltage bushing insulation monitoring device, which is installed on the high-voltage bushing insulation monitoring device. The inspection device is used to detect the current working state of the high-voltage bushing insulation monitoring device. The inspection device includes: A detection unit 10 and a remote control unit 20, wherein the detection unit 10 communicates with the remote control unit 20 wirelessly; The detection unit 10 is used to output an excitation signal to the high-voltage bushing insulation monitoring device, and includes a generator 11 and a transmitter 12 of the excitation signal, and a power supply 13 for supplying power to the generator 11 and the transmitter 12. The generator 11 is electrically connected to the transmitter 12, and the transmitter 12 passes through a through-core current transformer (through-core CT) of the high-voltage bushing insulation monitoring device, and the transmitter 12 is not in contact with the high-voltage bushing test line. The remote control unit 20 is used to remotely control the operation of the detection unit 10 . The remote control unit 20 is connected to the high-voltage bushing insulation monitoring device by signal through wireless communication.

[0021] When in use, the remote control unit 20 obtains the working parameters of the monitoring device and determines whether the current working state of the monitoring device is in a suspicious state. When it is determined that the monitoring device is currently in a suspicious state, the remote control unit 20 sends an instruction to the detection unit 10. The detection unit 10 receives the instruction and controls the generator 11 to send a standard excitation signal. The standard excitation signal is transmitted to the monitoring device by the transmitter 12. The response signal generated by the monitoring device after receiving the standard excitation signal is sent to the remote control unit 20 via wireless transmission.

[0022] In general, the embodiment of the present application adds an inspection circuit inside the bushing insulation monitoring device and uses wireless control technology to periodically or conditionally control the excitation output of the external wireless function generator 11 of the inspection circuit to complete the regular automated inspection of the bushing insulation monitoring channel.

[0023] In a feasible implementation of the embodiment of the present application, the transmitter 12 is a detection line, and the detection line is electrically connected to the generator 11. The detection line is in the sensor device of the bushing insulation monitoring device, and the detection line is parallel to the original test line in the sensor device of the bushing insulation monitoring device, and both pass through the through-core CT without interfering with each other. The setting method is simple and can reduce external interference.

[0024] When the bushing insulation monitoring device is normally energized, the end-screen current of the bushing flows out through the original test line in the sensor device, and its current amplitude and waveform are monitored by the through-core CT, while the detection line does not perform any work.

[0025] When the bushing insulation monitoring device is in a suspicious state, the detection unit 10 will be awakened and continuously output a series of standard excitation signals of different sizes through the test line. At this time, the through-core CT will monitor the excitation signal and make different responses.

[0026] The detection unit 10 is awakened wirelessly by the remote control unit 20. After being awakened, the wireless function generator 11 continuously applies a series of standard excitation signals of different sizes according to the excitation logic set by the software.

[0027] In a feasible implementation of the embodiment of the present application, both the remote control unit 20 and the detection unit 10 have a wireless antenna 14 , and the remote control unit 20 and the detection unit 10 communicate wirelessly via the wireless antenna 14 .

[0028] In a feasible implementation of the embodiment of the present application, the power supply 13 of the detection unit 10 is a solar power supply 13, and the solar power supply system supplies power to the wireless function generator 11 by floating charging.

[0029] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wireless inspection method for a high-voltage bushing insulation monitoring device, characterized in that: include: Obtain the current working parameters of the high-voltage bushing insulation monitoring device; Determine whether the high-voltage bushing insulation monitoring device is in a suspicious state according to the current working parameters; Applying a set of standard excitation signals to the high-voltage bushing insulation monitoring device in a suspicious state; Obtaining a response signal of a high-voltage bushing insulation monitoring device to a standard excitation signal; Determine whether the response signal of the high-voltage bushing insulation monitoring device matches the standard excitation signal; Determine whether the status of the high-voltage bushing insulation monitoring device is normal.

2. A wireless inspection method for a high-voltage bushing insulation monitoring device according to claim 1, characterized in that: Obtaining the current working parameters of the high-voltage bushing insulation monitoring device includes: Get the current monitoring value of the high-voltage bushing monitoring device; Get the duration of the current monitoring value of the high voltage bushing monitoring device.

3. A wireless inspection method for a high-voltage bushing insulation monitoring device according to claim 2, characterized in that: Judging whether the high-voltage bushing insulation monitoring device is in a suspicious state includes: Determine whether the current monitoring value of the high-voltage bushing monitoring device exceeds the permitted range; Determine whether the duration of the current monitoring value of the high-voltage bushing detection device exceeds the permitted range.

4. A wireless inspection device for high-voltage bushing insulation monitoring device, characterized in that: The inspection equipment is installed on the high-voltage bushing insulation monitoring device. The inspection equipment is used to detect the current working status of the high-voltage bushing insulation monitoring device. The inspection equipment includes: A detection unit and a remote control unit, wherein the detection unit communicates wirelessly with the remote control unit; The detection unit includes a generator and a transmitter of an excitation signal, and a power supply for powering the generator and the transmitter. The generator is electrically connected to the transmitter, and the transmitter passes through the through-core current transformer of the high-voltage bushing insulation monitoring device, and the transmitter does not contact the high-voltage bushing test line.

5. A wireless inspection device for high-voltage bushing insulation monitoring device according to claim 4, characterized in that: The transmitter is a detection line, and the detection line is electrically connected to the generator.

6. A wireless inspection device for high-voltage bushing insulation monitoring device according to claim 4, characterized in that: The remote control unit and the detection unit both have wireless antennas, and the remote control unit and the detection unit communicate wirelessly via the wireless antennas.

7. A wireless inspection device for high-voltage bushing insulation monitoring device according to claim 4, characterized in that: The power supply for the detection unit is a solar power supply.

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