Simulation environment design for the investigation of damping and dewing mechanisms in the 12kV high-voltage switchgear

Qize Pan,Fang Yang,Shulin Liu,Zhi Yang,Xiaoliang Tang,C.-H Weng,R Weerasinghe

doi:10.1051/e3sconf/20185303001

Abstract

The phenomenon of dampness and dewing inside the switchgear can improve the occurrence of serious equipment faults. Based on it, this paper, starting from the occurrence mechanism of dampness and dewing of the switchgear, summarizes the main techniques that can prevent and control them, and the merits and demerits of them are analysed. After that, based on the mechanism investigation of damping and dewing of 12kV switchgear, a simulation environment is designed in order to investigate the mechanism of damping and dewing the 12kV switchgear. Firstly, the entire simulation environment factors are given. Then, the prototype of this switchgear is designed, including base configuration and sensor installation configuration. In addition, the simulation environment of the distribution room, the switchgear with load operating conditions, several commonly used anti-dampness and anti-dewing methods of 12kV switchgear, and the rotary dehumidifier are designed. Lastly, prospects are given. This paper can provide some references for studying of damp-proofing and anti-dewing of 12kV switchgears.

Highlights

As a kind of electric equipment, switchgear or switch cabinet has been widely applied to urban power supply and distribution system
This paper presents the simulation environment design for the investigation of damping and dewing mechanisms of the 12kV high voltage switchgear
It is a common phenomenon that the switch cabinet is exposed to moisture and condensation

Summary

Introduction

As a kind of electric equipment, switchgear or switch cabinet has been widely applied to urban power supply and distribution system. When the switchgear is in maintenance, it will be inevitable that damp air from outside will enter into the switchgear, resulting in dampness and condensation phenomenon occurred inside the switchgear This can lead to serious accidents, it will affect the power supply reliability level of the whole system will be reduced [1,2,3]. The physical models established in most of current researches on antidampness and anti-dewing inside the switchgear are excessively ideal, they are very different from the actual ones. This is mainly because the internal structure of the switchgear is complicated with lots of components

Mechanism of dewing in the cabinet

Simulation environment design

Rrotary dehumidifier design

Prospects

Conclusion