Method for analogue simulation of ultrahigh-voltage GIS (gas insulated switchgear) oscillation type lightning surge voltage withstand test

Abstract

The invention discloses a method for analogue simulation of an ultrahigh-voltage GIS (gas insulated switchgear) oscillation type lightning surge voltage withstand test. The method comprises the following steps: according to the structural sizes of GIS devices of an actual transformer substation and electric wiring, calculating equivalent impedances of all components, and according to the geometric sizes of the components, calculating the wave impedance parameters and the wave velocity parameters of a breaker, a disconnector and a bus in a simulation model; according to the geometric sizes of the components and the parameters of the simulation model, establishing the simulation model by utilizing the ATP-EMTP software; determining the mode of connection of the simulation model and the waveform parameter of the oscillation type lightning surge voltage; adopting an oscillation type lightning surge voltage wave to perform impact simulation to the same mode of connection; determining the parameters of the actual GIS device oscillation type lightning surge voltage withstand test according to the simulation result. With adoption of the method disclosed by the invention, the defects in the prior art that the reliability is low, the security is poor, the economic benefits are poor and the like can be overcome, so as to realize the advantages of high reliability, excellent security and excellent economic benefits.

Description

technical field [0001] The invention relates to the technical field of high-voltage electric tests, in particular to a simulation method for an ultra-high voltage GIS oscillation type lightning impulse voltage withstand test. Background technique [0002] Gas insulated switchgear (GIS for short) is one of the important components of the UHV power grid. , Cable terminals, inlet and outlet bushings, etc. are optimally designed and installed in their respective sealed rooms, and finally assembled in a whole shell filled with SF6 as the insulating medium. Since it came out in the late 1960s, it has developed rapidly in the power transmission and transformation system and occupies a very important position. [0003] GIS substations are generally hub stations and occupy an extremely important position in the power system. Once it is damaged by lightning, it will cause a large-scale power outage and cause major economic losses. Lightning accidents in substations come from two as...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that there are at least defects such as low reliability, poor security and poor economic benefits in the prior art

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