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Test device and method for ultimate arc test under pressure of commutator tap-changer

A technology of tap changer and test test, applied in the direction of measuring device, circuit breaker test, measuring electricity, etc., can solve the problems of equipment fire, valve hall collapse, commutation fire and other problems, and achieve simple and easy-to-implement. Effect

Active Publication Date: 2022-07-15
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2018, the State Grid Tianshan Converter Station caught fire due to a grid-side GOE-type bushing failure. The fire spread from the converter body to the valve hall, causing the entire valve hall to collapse, resulting in 6 converters and converter valves in the same valve hall. The equipment caught fire; the bushing on the side of the converter substation in Yibin Converter Station was on fire due to a fault in the converter substation; the converter substation was on fire due to a fault in the HD converter substation in Changji Converter Station
[0004] So far, there is no clear report on the pressure limit test device or method of the top cover of the converter tap-changer

Method used

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  • Test device and method for ultimate arc test under pressure of commutator tap-changer
  • Test device and method for ultimate arc test under pressure of commutator tap-changer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see figure 1 , a commutator tap changer top cover pressure limit arc test test device, mainly including commutator tap changer test cylinder 1, commutator tap changer top cover 2, arc test high-speed synchronous measurement and acquisition system 3 , Pressure release device 4 , arc triggering device 5 , fire extinguishing water spray system 6 and high-speed camera system 7 .

[0039] Among them, the commutator tap changer top cover 2 is installed on the top of the commutator tap changer test cylinder 1, the arc triggering device 5 is installed in the commutator tap changer test cylinder 1, and the pressure release device 3 is installed in the changer On the top cover 2 of the rheological tap-changer, the sprinkler of the fire extinguishing water spray system 6 is located directly above the top cover 2 of the rheological tap-changer, and the high-speed camera system 7 is located beside the top cover 2 of the rheological tap-changer. The arc test high-speed synchronous m...

Embodiment 2

[0047] see figure 2 , a test method for the pressure-bearing limit arc test of the top cover of a commutator tap-changer, implemented based on the test device of Embodiment 1, comprising the following steps:

[0048] Step 1, formulate a list of arc test plans, from low-energy arc test to high-energy arc test, set the short-circuit arc current RMS, peak value, symmetry, fault duration, electrode spacing, etc.;

[0049] Step 2, set the impedance parameters of the power supply circuit, and install the 0.5mm~1mm diameter arc-striking copper wire on the electrode contact;

[0050] Step 3, select the appropriate gate angle, and close the isolation switch and circuit breaker in the power circuit in turn;

[0051] Step 4, the high-speed synchronous measurement and acquisition system is automatically triggered, and real-time high-speed synchronous measurement and acquisition are performed for characteristics such as short-circuit voltage, current, internal oil pressure of the tap cha...

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Abstract

The invention discloses a pressure-bearing limit arc test device for the top cover of a commutator tap changer, comprising a commutator tap changer test cylinder, a commutator tap changer top cover, a high-speed synchronous measurement and acquisition system for the arc test, Pressure relief devices, arc triggering devices, fire sprinkler systems and high-speed camera systems. At the same time, the invention also discloses a test method for the pressure-bearing limit arc test of the top cover of the commutator tap changer. The device and method of the present invention, on the premise of ensuring the personal safety of the experimenter and the safety of the test equipment, realizes the simulation of the real arc fault inside the tap changer, and obtains the pressure bearing of the tap changer top cover under the impact of the fault oil pressure It provides a top cover pressure test device and a demonstration method for tap changer manufacturers and field operators. It is an important project for improving the pressure bearing structure of the tap changer top cover and improving the safe operation level of the tap changer and converter. Practical value.

Description

technical field [0001] The invention relates to the field of high-voltage test simulation of electric power equipment, in particular to a test device and method for a pressure-bearing limit arc test of the top cover of a commutator tap changer. Background technique [0002] In recent years, with the rapid development of UHVDC transmission projects, the operation of power grids has put forward higher requirements for the safety and reliability of power transmission and transformation equipment. As the core equipment of energy conversion and transmission in the converter station, the converter transformer has become a major source of substation and converter station failures due to the direct economic losses (including equipment loss and power loss) and indirect losses caused by power outages caused by its failure. key and significant influencing factors. Since 2018, the State Grid Tianshan converter station caught fire due to the failure of the grid-side GOE casing. The fire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327G01R31/00G01M3/02A62C31/00A62C3/16
CPCG01R31/327G01R31/00G01M3/02A62C3/16A62C31/00
Inventor 邓军陈星刘锡忠田文革潘志城邓集瀚谢志成梁晨刘青松张晋寅周海滨楚金伟彭翔李孟波蔡彬
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID