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Power supply system of partial discharge test used for extra-high voltage transformer

A technology for testing power supply and partial discharge, which is applied in transformer testing, electrical measuring instrument components, instruments, etc., can solve the problems of small capacity, high interference level, and large-capacity transformers cannot be well applied, so as to reduce radiation , to avoid impact, to facilitate the effect of movement and transportation

Active Publication Date: 2010-06-02
CHINA ELECTRIC POWER RES INST +1
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AI Technical Summary

Problems solved by technology

[0003] 1. The capacity is small, and it is generally tested for transformers of 500kV and below. It is not suitable for large-capacity transformers.
[0004] 2. The background interference level of the existing test power supply system is relatively high, which cannot meet the experimental requirements of 1000kV transformers

Method used

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  • Power supply system of partial discharge test used for extra-high voltage transformer
  • Power supply system of partial discharge test used for extra-high voltage transformer

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Embodiment approach 1

[0029] Determine the capacity of the motor 1 and the intermediate frequency generator 2 according to the power supply capacity required by the UHV transformer sample 11 in the partial discharge test. For example, the capacity of the test sample 11 is a single-phase autotransformer with a capacity of 1000MVA, and the motor 1 needs to be selected from 300kW to With a capacity of 1000kW, the medium frequency generator 2 needs to choose a capacity of 800kVA to 2500kVA, and the output voltage of the medium frequency generator 2 is 690V to 1000V. The control cabinet 3 is equipped with a programmable logic controller (abbreviated as PLC), a power acquisition module, a local / remote control converter, a voltage regulator, a contactor, an intermediate relay and an exciter, etc., which can control the start and stop of the motor 1, The opening and closing of the excitation circuit of the intermediate frequency generator, the step-up and step-down of the intermediate frequency generator, e...

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PUM

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Abstract

The invention provides a power supply system of a partial discharge test used for an extra-high voltage transformer. The power supply system comprises an electromotor 1, an intermediate frequency generator 2, a control cabinet 3, a power supply wire inlet 4, a generator wire outlet 5, a protective cabinet 6, a low-voltage compensating reactor 8, an intermediate transformer 9, a compensating reactor 10, a test object 11, and the like; and all the device are integrally arranged in a container cabinet made of metal. The system provides the stable and reliable power supply system with little background interference for an on-site induced voltage test and the partial discharge test of the extra-high voltage transformer, and guarantees to meet the requirement for testing the test object of the extra-high voltage transformer.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, and in particular relates to a partial discharge test power supply system for UHV transformers. Background technique [0002] During the long-term operation of the transformer, partial discharge may occur in some weak parts of its internal insulation under high field strength, resulting in insulation degradation. Under the long-term action of severe partial discharge, it may even cause breakdown, resulting in damage to the transformer . Especially for UHV transformers, in order to check whether their insulation performance is intact, long-term induced voltage and partial discharge tests must be carried out after on-site installation to assess their insulation performance. How to use a simple and reliable test power system in the field test to pressurize the UHV transformer test product according to the test research, and at the same time effectively suppress and avoid the int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28G01R31/12
CPCG01R31/1227G01R31/027G01R31/62
Inventor 李光范杨杰李金忠胡晓岑张书琦齐月文
Owner CHINA ELECTRIC POWER RES INST
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