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Gas-insulated composite electric spark discharge fault simulation experiment device and method

A technology of gas insulation combination and spark discharge, which is applied in the direction of testing dielectric strength, etc., can solve the problem that spark discharge cannot be effectively simulated, and achieve the effect of effectively stabilizing spark discharge, improving accuracy, and ensuring accuracy

Active Publication Date: 2018-11-13
WUHAN UNIV +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is aimed at the existing SF 6 The failure simulation experiment device of gas-insulated electrical equipment cannot effectively simulate the faults such as spark discharge, and a method that can control SF 6 The simulation experiment device for the number of gas spark discharges can simulate SF such as GIS in the laboratory 6 Different degrees of spark discharge faults in gas-insulated electrical equipment, in order to further improve the evaluation of SF 6 The insulation state of electrical equipment provides a reliable experimental basis

Method used

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  • Gas-insulated composite electric spark discharge fault simulation experiment device and method
  • Gas-insulated composite electric spark discharge fault simulation experiment device and method
  • Gas-insulated composite electric spark discharge fault simulation experiment device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the spark discharge fault simulation experiment device of gas insulated combined electrical appliances mainly includes voltage regulator 101, non-corona test transformer 102, capacitor divider 103, water resistance 104, high voltage silicon stack 105, single pole double throw relay 106, charge and discharge Capacitor 107, discharge resistor 108, first resistor R1, frequency adjustable resistor R2, first diode D1, third resistor R3, duty cycle adjustable resistor R4, capacitor group C0, second diode D2, Five capacitors C05, fifth resistor R5, first regulated power supply VCC-1, second regulated power supply VCC-2, optocoupler OC, sixth resistor R6, seventh resistor R7, transistor T, third diode D3 , High pressure probe 401, oscilloscope 402, Rogowski coil 403, contact plate 501 and probe 502, tank 30, top flange 301, high pressure pipe 31, bottom flange 302, low pressure pipe 32, middle flange 303, first The hole 3051, the second hole 3052, the ...

Embodiment 2

[0043] One can control SF 6 The simulation experiment device for the number of gas spark discharges is the same as in Example 1, wherein: the shape of the tank body 30 is 55cm in inner diameter, 1.5cm in thickness, the height of the middle cylinder is 70cm, and the top and bottom ends are two spherical radii It is a closed cavity with a hemispherical surface of 55 cm. The lower part of a side wall of the tank body 30 is provided with a suction hole with a diameter of 12 cm. The upper part of the other side wall of the tank 30 is provided with a sampling hole with a diameter of 2 cm. On the side wall between the suction hole and the air inlet of the tank body 30, a vacuum pressure gauge hole with a diameter of 2 cm and another air inlet hole with a diameter of 2 cm are provided. Two circular through holes with a diameter of 0.7 cm are arranged above the suction hole on the side wall of the cylinder body 30. A flange with an inner diameter of 7 cm and an outer diameter of 13 cm...

Embodiment 3

[0045] The relay control circuit 2 includes a square wave generator, a stabilized power supply, an optocoupler, a resistor, a diode and a triode. Commercially available square wave generators use the frequency adjustable resistor R4 and the duty cycle adjustable resistor R2 to adjust the frequency and duty cycle of the output square wave. The power input of the commercially available square wave generator is connected to the output of the 12V regulated power supply 1, the output of the square wave generator is connected to a 650 ohm resistor R1, and the other end of the resistor R1 is connected to the negative pole of the two pins of the optocoupler OC input terminal. , The positive pole of the two pins of the optocoupler OC input terminal is connected to the output terminal of the first regulated power supply, and the ground terminal of the 12V first regulated power supply is connected to the ground terminal of a commercially available square wave generator. The positive pole ...

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Abstract

The invention aims to solve the problem that a fault simulation experiment apparatus of an SF6 gas insulated electric appliance in the prior art cannot effectively stimulate the faults such as spark discharge, and provides a gas insulated substation spark discharge fault simulation experiment apparatus and a method thereof. The experiment apparatus includes a basic circuit, a relay control circuit, an SF6 discharge device, an energy detection device, and a defect device. The experiment apparatus and the method make up the defect that spark discharge times cannot be controlled under alternating current, so that the fault determination accuracy of the SF6 gas insulated electric appliance is improved, the voltage and current information of the spark discharge can be acquired in real time to obtain the spark discharge energy through calculation to enrich the quantitative criteria of the fault degree of the SF6 gas insulated electric appliance. The experiment apparatus and the method realize the effective control of spark discharge times and frequencies and guarantee the stimulation accuracy.

Description

Technical field [0001] The present invention belongs to sulfur hexafluoride (SF 6 ) The technical field of on-line monitoring of the insulation status of gas insulated electrical equipment, specifically related to SF 6 Simulating device for spark discharge faults of gas-insulated combined electrical appliances. Background technique [0002] SF 6 Gas-insulated combined electrical appliances (GIS for short) have been widely used in the construction and transformation of large and medium-sized urban power grids in recent years due to their stable operation, small footprint and small maintenance workload, and have gradually become one of the main equipment of modern power grids. First, its safe and reliable operation directly determines the reliability of modern urban power grids. However, in the process of GIS manufacturing, installation, operation and maintenance, there will inevitably appear insulation defects such as metal protrusions, free metal particles, and surface contaminat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 唐炬曾福平张茜张晓星姚强张潮海程林苗玉龙刘欣
Owner WUHAN UNIV