A gas insulated busbar vibration measurement field calibration device and method

Abstract

The application discloses a kind of gas insulation bus vibration measurement field calibration device and method, device includes vibration sensor, gas insulation bus shell test fixture and the vibration exciter unit, drive amplification unit, signal source and comparison verification unit connected, the vibration sensor is connected with the gas insulation bus shell test fixture by default installation scheme, the vibration exciter unit is connected with the gas insulation bus shell test fixture, the comparison verification unit is connected with the vibration sensor.The gas insulation bus vibration measurement field calibration device and method provided by the application can overcome the sensor sensitivity calibration error caused by different shell structures, improve the test accuracy of vibration sensor for gas insulation bus.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, specifically to a field calibration device and method for measuring the vibration of gas-insulated busbars. Background Technology

[0002] Gas-insulated metal-enclosed busbars, as a type of high-voltage, high-current power transmission equipment with the outer shell and conductor arranged coaxially, are widely used in power systems due to their characteristics such as large transmission capacity, small footprint, low transmission loss, and long service life. They are one of the key equipment in the power transmission and distribution links of the power system and undertake the important task of power transmission.

[0003] To ensure the long-term safe operation of the gas-insulated busbar and improve power supply reliability, maintenance personnel need to use inspection equipment to conduct irregular condition testing on the gas-insulated busbar to ensure that there is no displacement caused by vibration at the flange connections and bushings of the gas-insulated busbar.

[0004] In engineering, vibration testing is a primary method for monitoring the condition of gas-insulated busbars. However, this method typically assesses the sensitivity of vibration sensors in a flat test environment. This is not representative of the complex, multi-arc surface structure of gas-insulated metal-enclosed busbars, potentially leading to measurement errors due to inconsistencies between the sensor's calibration value and the actual measurement results at different locations on the busbar. Therefore, on-site calibration of the vibration detection device's sensitivity at different locations on the gas-insulated busbar is crucial. Summary of the Invention

[0005] The purpose of this invention is to provide a field calibration device and method for vibration measurement of gas-insulated busbars, which can overcome the sensor sensitivity verification error caused by different shell structures and improve the testing accuracy of vibration sensors for gas-insulated busbars.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a field calibration device for vibration measurement of gas-insulated busbars, comprising a vibration sensor, a gas-insulated busbar shell test fixture, and a connected exciter unit, a drive amplification unit, a signal source, and a comparison and verification unit. The vibration sensor is connected to the gas-insulated busbar shell test fixture through a preset installation scheme, the exciter unit is connected to the gas-insulated busbar shell test fixture, and the comparison and verification unit is connected to the vibration sensor.

[0008] In conjunction with the first aspect, the gas-insulated busbar housing test fixture is further equipped with a corresponding model according to the housing size of the gas-insulated busbar and the radius of the supporting insulator.

[0009] In addition to the first aspect, all models of gas-insulated busbar housing test fixtures are equipped with exciter unit mounting holes.

[0010] In conjunction with the first aspect, the preset installation scheme is further determined based on the outer shell size of the gas-insulated busbar to be tested, the radius of the supporting insulator, and the length of the gas chamber.

[0011] In conjunction with the first aspect, the vibrator unit is further rigidly connected to the gas-insulated busbar housing test fixture by bolts.

[0012] In conjunction with the first aspect, the exciter unit is further connected to the drive amplification unit via a high-voltage wire.

[0013] Secondly, the present invention provides a field calibration method for vibration measurement of gas-insulated busbars, comprising:

[0014] Based on the outer shell size of the gas-insulated busbar to be tested and the radius of the supporting insulator, select the appropriate model of gas-insulated busbar shell test fixture and connect it to the exciter unit;

[0015] According to the preset installation plan, install the vibration sensor to be calibrated with the gas-insulated busbar shell test fixture;

[0016] A standard sine wave signal is generated by a signal source, and a standard vibration signal is generated by driving the exciter unit and the gas-insulated bus shell connected to it through a drive amplifier unit.

[0017] The mechanical vibration test signal output by the vibration sensor to be calibrated is sent to the comparison and verification unit. By comparing the standard vibration signal and the mechanical vibration test signal, the vibration sensor and installation scheme are calibrated on-site.

[0018] In conjunction with the second aspect, furthermore, according to the preset installation plan, the vibration sensor to be calibrated is installed with the gas-insulated busbar housing test fixture, including:

[0019] Select the number of vibration sensors based on the length of the gas chamber of the gas-insulated busbar to be tested;

[0020] Based on the outer casing size of the gas-insulated busbar to be tested and the radius of the supporting insulator, select a clamp of appropriate size, and install the vibration sensor to be calibrated onto the gas-insulated busbar casing test fixture through the clamp.

[0021] In conjunction with the second aspect, furthermore, the amplitude and frequency of the standard vibration signal generated by the drive amplification unit driving the exciter unit and the gas-insulated busbar shell connected thereto are fixed.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The field calibration device and method for vibration measurement of gas-insulated busbars provided by this invention can calibrate gas-insulated busbars with different shell sizes, overcome the sensor sensitivity verification error caused by different shell structures, improve the testing accuracy of vibration sensors for gas-insulated busbar structures, and is of great significance to the safe and reliable operation of power systems. Attached Figure Description

[0024] Figure 1 A schematic diagram of the field calibration device for measuring the vibration of a gas-insulated busbar provided in an embodiment of the present invention;

[0025] Figure 2 This is a flowchart of the field calibration method for vibration measurement of gas-insulated busbars provided in an embodiment of the present invention.

[0026] In the diagram: 1-Vibration sensor, 2-Gas-insulated busbar shell test fixture, 3-Vibration unit, 4-Drive amplifier unit, 5-Signal source, 6-Comparison and verification unit. Detailed Implementation

[0027] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0028] Example 1:

[0029] This embodiment provides a field calibration device for vibration measurement of gas-insulated busbars, such as... Figure 1 As shown, it includes a vibration sensor 1, a gas-insulated busbar shell test fixture 2, and a connected exciter unit 3, a drive amplification unit 4, a signal source 5, and a comparison and verification unit 6. The vibration sensor 1 is connected to the gas-insulated busbar shell test fixture 2 through a preset installation scheme, the exciter unit 3 is connected to the gas-insulated busbar shell test fixture 2, and the comparison and verification unit 6 is connected to the vibration sensor 1.

[0030] The preset installation scheme is determined based on the outer shell dimensions of the gas-insulated busbar under test, the radius of the supporting insulators, and the length of the gas chamber. The vibrator unit 3 is rigidly connected to the gas-insulated busbar outer shell test fixture 2 via bolts. The vibrator unit 3 is connected to the drive amplification unit 4 via a high-voltage conductor.

[0031] In this embodiment, the gas-insulated busbar shell test fixture is equipped with corresponding models according to the shell size of the gas-insulated busbar and the radius of the supporting insulator; each model of the gas-insulated busbar shell test fixture is provided with a vibrator unit mounting hole.

[0032] The field calibration device for vibration measurement of gas-insulated busbars provided in this embodiment is equipped with corresponding gas-insulated busbar shell test fixtures according to the different shell sizes and supporting insulator radii of the gas-insulated busbars. This allows for calibration of gas-insulated busbars with different shell sizes, overcoming sensor sensitivity verification errors caused by different shell structures and improving the testing accuracy of vibration sensors on gas-insulated busbar structures. Furthermore, each model of gas-insulated busbar shell test fixture is equipped with exciter unit mounting holes, ensuring a reliable connection between the gas-insulated busbar shell test fixture and the exciter unit without relative displacement.

[0033] Example 2:

[0034] Please see Figure 2 This embodiment provides a field calibration method for vibration measurement of gas-insulated busbars, including the following steps:

[0035] Step 1: Select the appropriate gas-insulated busbar shell test fixture based on the shell size of the gas-insulated busbar to be tested and the radius of the supporting insulator, and connect it to the exciter unit;

[0036] During on-site calibration, the outer shell dimensions and supporting insulator radii vary at different locations on the gas-insulated busbar under test. Based on these dimensions, a suitable gas-insulated busbar outer shell test fixture is selected and connected to the vibrator unit to ensure secure fixation between the fixture and the busbar. Each model of the gas-insulated busbar outer shell test fixture is equipped with vibrator unit mounting holes. These holes are used to connect the fixture to the vibrator unit, ensuring a reliable connection and preventing relative displacement between them.

[0037] Step 2: Install the vibration sensor to be calibrated onto the gas-insulated busbar housing test fixture according to the preset installation plan;

[0038] According to the preset installation plan, the installation of the vibration sensor to be calibrated with the gas-insulated busbar housing test fixture includes the following steps:

[0039] Step a: Select the number of vibration sensors based on the length of the gas chamber of the gas-insulated busbar to be tested;

[0040] Step b: Select a clamp of appropriate size according to the outer shell size of the gas-insulated busbar to be tested and the radius of the supporting insulator, and install the vibration sensor to be calibrated to the gas-insulated busbar outer shell test fixture through the clamp.

[0041] In this embodiment, the number of vibration sensors used is determined by the length of the gas-insulated busbar's air chamber. The vibration sensors are installed on the gas-insulated busbar shell test fixture using aluminum alloy clamps. For different parts of the gas-insulated busbar under test, with varying shell dimensions and supporting insulator radii, aluminum alloy clamps of appropriate sizes are selected. The vibration sensors to be calibrated are then fixedly installed on the gas-insulated busbar shell test fixture. During installation, reliable fixation is ensured between the vibration sensors to be calibrated and the gas-insulated busbar shell test fixture, and between the gas-insulated busbar shell test fixture and the shell of the gas-insulated busbar under test.

[0042] Step 3: Use a signal source to generate a standard sine wave signal, and use the drive amplifier unit to drive the exciter unit and the gas-insulated busbar shell connected to it to generate a standard vibration signal;

[0043] When the exciter unit fixed on the gas-insulated busbar shell test fixture receives the sinusoidal signal amplified and driven by the amplification unit and the drive unit, it generates simple harmonic vibration with the same frequency as the signal source, causing the gas-insulated busbar shell under test, which is reliably fixed thereto, to also generate vibration with a fixed amplitude and frequency.

[0044] Step 4: Send the mechanical vibration test signal output by the vibration sensor to be calibrated to the comparison and verification unit. By comparing the standard vibration signal and the mechanical vibration test signal, the vibration sensor and installation scheme are calibrated on-site.

[0045] The mechanical vibration test signal obtained by the vibration sensor to be calibrated through the vibration of the gas-insulated busbar shell is sent together with the standard vibration signal into the comparison and verification unit. The standard vibration signal and the mechanical vibration test signal are compared by the comparison and verification algorithm. Based on the field output results of the comparison and verification algorithm, the vibration sensor and installation scheme of the gas-insulated busbar are calibrated on-site.

[0046] The field calibration method for vibration measurement of gas-insulated busbars provided in this embodiment can calibrate gas-insulated busbars with different shell sizes, overcome the sensor sensitivity verification error caused by different shell structures, improve the testing accuracy of vibration sensors for gas-insulated busbar structures, and is of great significance to the safe and reliable operation of power systems.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A field calibration method for vibration measurement of gas-insulated busbars, characterized in that, The field calibration device for vibration measurement of gas-insulated busbars includes a vibration sensor, a gas-insulated busbar shell test fixture, and connected exciter unit, drive amplification unit, signal source, and comparison and verification unit. The vibration sensor is connected to the gas-insulated busbar shell test fixture through a preset installation scheme, the exciter unit is connected to the gas-insulated busbar shell test fixture, and the comparison and verification unit is connected to the vibration sensor. The methods include: Based on the outer shell size of the gas-insulated busbar to be tested and the radius of the supporting insulator, select the appropriate model of gas-insulated busbar shell test fixture and connect it to the exciter unit; According to the preset installation plan, install the vibration sensor to be calibrated with the gas-insulated busbar shell test fixture; A standard sine wave signal is generated by a signal source, and a standard vibration signal is generated by driving the exciter unit and the gas-insulated bus shell connected to it through a drive amplifier unit. The mechanical vibration test signal output by the vibration sensor to be calibrated is sent to the comparison and verification unit. By comparing the standard vibration signal and the mechanical vibration test signal, the vibration sensor and installation scheme are calibrated on-site. According to the preset installation plan, the vibration sensor to be calibrated is installed with the gas-insulated busbar housing test fixture, including: Select the number of vibration sensors based on the length of the gas chamber of the gas-insulated busbar to be tested; Based on the outer shell size of the gas-insulated busbar to be tested and the radius of the supporting insulator, select the appropriate clamp size, and install the vibration sensor to be calibrated onto the gas-insulated busbar outer shell test fixture through the clamp; The amplitude and frequency of the standard vibration signal generated by the drive amplifier unit driving the exciter unit and the gas-insulated busbar shell connected to it are fixed.

2. The field calibration method for vibration measurement of gas-insulated busbars according to claim 1, characterized in that, The gas-insulated busbar casing test fixture is equipped with a corresponding model according to the casing size of the gas-insulated busbar and the radius of the supporting insulator.

3. The field calibration method for vibration measurement of gas-insulated busbars according to claim 2, characterized in that, All models of gas-insulated busbar housing test fixtures are equipped with exciter unit mounting holes.

4. The field calibration method for vibration measurement of gas-insulated busbars according to claim 1, characterized in that, The preset installation scheme is determined based on the outer shell size of the gas-insulated busbar to be tested, the radius of the supporting insulator, and the length of the gas chamber.

5. The field calibration method for vibration measurement of gas-insulated busbars according to claim 1, characterized in that, The exciter unit is rigidly connected to the gas-insulated busbar housing test fixture by bolts.

6. The field calibration method for vibration measurement of gas-insulated busbars according to claim 1, characterized in that, The exciter unit is connected to the drive amplifier unit via a high-voltage wire.

Images