Voltage withstand test analogue simulation method for ultra-high-voltage GIS standard lightning impulse voltage

Abstract

The invention discloses a voltage withstand test analogue simulation method for ultra-high-voltage GIS standard lightning impulse voltage. The voltage withstand test analogue simulation method comprises the steps that equivalent impedance of each element is calculated according to the structural size of transformer substation GIS equipment and an electric connecting wire, and wave impedance parameters and wave speed parameters of a breaker, a disconnecting switch and a bus in a simulation model are calculated according to the geometrical sizes of all the elements; according to the geometrical sizes of all the elements and the model parameters, the simulation model is established by the utilization of ATP-EMTP software; a wiring mode of the simulation model and standard lightning impulse voltage waveform parameters are determined; impact simulation is conducted on the same wiring mode by the adoption of standard lightning impulse voltage waves of different wave heads; actual safety voltage withstand test parameters of the GIS equipment standard lightning pulse voltages are determined according to simulation results. The analogue simulation method can overcome the defects that in the prior art, the reliability is low, the safety is poor and economic looses are large, and has the advantages of being high in reliability, good in safety and small in economic loss.

Description

technical field [0001] The invention relates to the technical field of high voltage simulation, in particular to a simulation method for a lightning impulse withstand voltage test of an ultra-high voltage GIS standard. 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 aspects: ...

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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 large economic losses in the prior art

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