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Mobile type cyclic VFTO (Very Fast Transient Overvoltage) insulating oil testing system

A cyclic test, insulating oil technology, applied in measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of slowness, not considering the impact of VFTO impact overvoltage waves, etc., and achieve the effect of high efficiency and convenient use

Active Publication Date: 2014-12-31
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a large number of GIS power equipment and the insulation structure design of transformers are checked and designed according to the relatively slow lightning wave level, without considering the impact of VFTO impulse overvoltage waves generated inside GIS, especially the transformer winding and its transformer oil. influences

Method used

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  • Mobile type cyclic VFTO (Very Fast Transient Overvoltage) insulating oil testing system

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Embodiment Construction

[0013] See figure 1 , a mobile VFTO insulating oil circulation test system, the features of the present invention are:

[0014] The system consists of three parts: VFTO control generator 1, peaking switch 2 and insulating oil circulation test device 3; among them:

[0015] The VFTO control generator 1 is composed of a computer control system 5 connected to a VFTO generator 7. The computer control system 5 is directly connected to the VFTO generator 7 through an optical fiber 6, and a moving wheel 4 is installed at the bottom of the VFTO generator;

[0016] The peaking switch 2 is composed of a damping resistor 8 and a peaking gap 10. The damping resistor 8 is connected to the peaking gap 10 through a high-voltage transmission line 11; the high-voltage transmission line 11 and the peaking gap 10 are directly supported on the gas tank shell 9 through a supporting insulator 12 Inside: the insulating oil circulation test device 3 is composed of a high-voltage transmission line te...

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Abstract

The invention discloses a mobile type cyclic VFTO (Very Fast Transient Overvoltage) insulating oil testing system. The system comprises a VFTO control generator (1), a peaking switch (2) and a cyclic insulating oil testing system (3). With the adoption of the system, various testing functions of an ns-grade VFTO wave to transformer oil are realized, and the system is integrally installed and has the remarkable advantages of convenience in use, mobility, high efficiency and full-sealing mode, sample change easiness and the like.

Description

technical field [0001] The invention relates to the technical field of a GIS body VFTO wave insulating oil test device. Background technique [0002] GIS (Gas Insulated Switchgear) gas-insulated switchgear is an electrical device in which all conventional power equipment except transformers are integrated inside SF6 gas. It is often used as an important power transmission device and has always been considered to have strong safety. However, recent studies have found that the operation of the isolation switch or circuit breaker inside the GIS often produces a very fast transient overvoltage (VFTO, Very Fast Transient Overvoltage). The study of VFTO waves shows that because the leading edge of such overvoltage waves is steeper than that of lightning waves, it is about a few ns to hundreds of ns; and although its amplitude is not as high as that of lightning waves, its destructive power is not inferior to that of lightning waves, that is Because the leading edge of VFTO overvo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00G01R31/00
Inventor 谭向宇杨卓赵现平王科彭晶王达达张少泉马仪陈磊徐肖伟陈晓云马宏明文斌曾宬李璟瑞
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST