A New Model for Polluted insulators Flashover under HVDC

T. Chihani (1) , A. Mekhaldi (1) , Abderrahmane Beroual (2) , M. Teguar (1)

1 LRE - Laboratoire de recherche en électrotechnique = Electrical engineering research laboratory [ENP, Alger]
2 EE - Ampère, Département Energie Electrique

This paper presents a new DC high voltage insulators flashover model that describes the different phases of flashover process. This model uses an equivalent electrical circuit consisting of two resistances in series and an energetic balance. It comprises two algorithms: (1) the first one is a static sub-model that describes the stable mode for the beginning of flashover; and (2) the second one describes the unstable mode of the discharge by a dynamic sub-model. A new analytical equation has been established to compute the discharge linear resistance. This model allows studying the different parameters of discharge channel such as the discharge current, radius, velocity, temperature and linear resistance.

Mots clés: HVDC; static sub-model; dynamic sub-model; equivalent electrical circuit; energetic balance; flashover process; polluted insulator flashover; DC high voltage insulator flashover model

Domaines: Energie électrique

T. Chihani, A. Mekhaldi, Abderrahmane Beroual, M. Teguar. A New Model for Polluted insulators Flashover under HVDC. ICHVE, Sep 2018, Athènes, Greece. pp.1-4, ⟨10.1109/ICHVE.2018.8641984⟩. ⟨hal-02132741⟩