Withstand voltage testing system and assembly method thereof

Abstract

The invention relates to the technical field of high-voltage electrical withstand voltage testing equipment, in particular to a withstand voltage testing system and an assembly method thereof. The withstand voltage testing system comprises a base, a high-voltage electric reactor capable of being fixed onto the base, a capacitive voltage divider capable of being fixed onto the base, a hydraulic lifting device, a first voltage-sharing shield, a second voltage-sharing shield and a contact tube. The hydraulic lifting device is arranged on the base in a free rotation mode and comprises a first hydraulic lifting arm for supporting the high-voltage reactor to be positioned at any position from the horizontal direction to the vertical direction and a second hydraulic lifting arm for supporting the capacitive voltage divider to be positioned at any position from the horizontal direction to the vertical direction; the first voltage-sharing shield is detachably connected to the end of the high-voltage reactor; the second voltage-sharing shield is detachably connected to the end of the capacitive voltage divider; the contact tube is movably connected between the first voltage-sharing shield and the second voltage-sharing shield. The withstand voltage testing system is convenient to transport, does not need to be disassembled or assembled frequently, is convenient and fast to operate and high in safety coefficient, and meets the requirements of withstand voltage tests.

Description

Technical field [0001] The invention relates to the technical field of high-voltage electrical withstand voltage test equipment, in particular to a withstand voltage test system and an assembly method thereof. Background technique [0002] At present, series resonance withstand voltage test devices are used both at home and abroad to conduct AC withstand voltage tests on high-voltage electrical equipment. The AC withstand voltage tests of 220kV and above GIS, current transformers, circuit breakers, and isolating switches require high voltage and large capacity tests. Equipment, series resonant devices can be divided into variable frequency series resonant devices and tuned series resonant devices, tuned series resonance is to adjust the inductance of high-voltage reactors to achieve the best resonance point. The production of adjustable high-voltage reactors is more complicated and it is difficult to use on site. Convenient, generally use variable frequency series resonance devic...

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Problems solved by technology

Due to the large volume of the voltage equalizing cover, when assembling the last reactor, capacitive voltage divider and voltage equalizing cover, the operator needs to climb on the insulation ladder to carry out high-altitude operations, which is difficult to assemble and has a great safety risk; after the test, It is necessary to use a crane to install the frequency conversion power supply, excitation transformer, three-section reactor, high-voltage reactor base, three-section capacitor voltage divider, voltage divider base, and voltage equalizing cover used in the withstand voltage test on the large-capacity truck. Finally, each equipment is reinforced with fastening ropes to prevent the equipment from toppling and colliding. In the field test, the lifting equipment, loading and unloading equipment and reinforcement operations are very cumbersome, which greatly increases the labor intensity of the operators and brings great inconvenience to the operators. It is very inconvenient, and the operation safety risk is high, which brings great safety hazards to the operators

[0004] When carrying out the AC withstand voltage test on the high-voltage electrical equipment of the substation, a crane should be used to unload the test equipment from the truck on site. When working around live equipment, the safety risk of crane loading and unloading is relatively large. If the safe distance between the crane and the live equipment is not enough , it is easy to cause electric shock accidents, personal casualties and power grid accidents; when assembling the reactors, voltage dividers and voltage equalizing covers of each section, people need to stand on the insulation ladder and cooperate with the crane master to make the connection between the equipment The alignment holes are aligned and fastened with bolts. The lifting rope must be removed every time the equipment is hoisted. It is most difficult to install the top reactor, voltage divider and pressure equalizing cover. If the site is wide, an aerial work vehicle can be used, but It cannot be used in many places and requires the use of insulating ladders. When people work on a 6-meter-high herringbone insulating ladder, the induction current is very large when touching the equipment, which brings great safety hazards to the operators; during assembly work It requires close cooperation and collaborative work between operators, but it takes a lot of time. For example, it takes 6-8 people to complete the AC withstand voltage test of a group of 500kV current transformers, and it takes one working day to complete the equipment loading and unloading and assembly. , Dismantling and reinforcement basically take up nearly half of the time. When carrying out emergency work on the power grid, it is more important to shorten the time for the withstand voltage test

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