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Reportedly, switching operation in gas insulated substation (GIS) leads to deformation of transformer winding and bushing failures. This paper presents practicable method that is investigated for mitigation of overvoltage magnitude and resonance frequency amplitude of very fast transients (VFT) at the power transformer. Properties of this method are simple and inexpensive with at least changes in...
The Modeling methods for elements (equipments) in the primary circuits of Gas Insulated Substation (GIS) are discussed and summarized. The EMTP is used to set up the simulation model of the primary and secondary circuits of an 110kV GIS and the Very Fast Transient Overvoltage (VFTO) and conducted interference caused by swiching operations traveling to the secondary circuits are calculated. The so-formed...
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