Abstract Electric field grading devices have great importance for both the electric power transmission and distribution systems. This paper presents an improved device used in medium voltage metal-enclosed switchgear. The solutions been carried out by using Ansys Maxwell 3D software. structure of two electrodes designed as cylindrical elliptical compared to determine be practice. transient stea...

The manuscript presents advanced coupled analysis: Maxwell 3D, Transient Thermal and Fluent CFD, at the time of a rated current occurring on main busbars in low-voltage switchgear. simulations were procured order to aid design process such enclosures. analysis presented flow switchgear busbars, which allowed determining their temperature values. assumption simulation was measurements rise durin...

Abstract In order to enable a robot do the omni-directional mobility for inspection in pipeline of Gas Insulation Switchgear, negative pressure adsorption is designed. Firstly, mechanical structure was designed based on adsorption. The internal surface motion model built, and variable control method proposed by analysis. Simulations experiments showed that could steadily adsorb any position pip...

OVERVIEW: Hitachi has developed smaller and more reliable gas-insulated switchgear (GIS) in response to demands for lower costs and stable power supplies. Reliability of this GIS was improved and the enclosure diameter was reduced in order to minimize the installation space by using new analysis techniques and rationalization in insulation design and in temperature rise criteria. Furthermore, t...

In recent years, an increasing demand for partial discharge (PD) testing on medium and high voltages apparatus has been observed. This includes cables, switchgear, transformers and rotating machines, both with on-line (inservice) and off-line (out-of-service) testing/monitoring practices to increase reliability and reduce financial losses due to plant downtime, unplanned outages and expensive m...

High reliability of gas insulated switchgear apparatus is diminished by the presence of defects inside the system. The most common defects are due to metallic particles. This defect can be detected by several techniques, one of which is that using acoustic sensors placed on the enclosure. This paper presents the technique to detect metallic particle from the parameters of acoustic signal such a...

10 kV and 35 switchgear are the key equipment in power grid, safety of their insulation is related to stability entire grid. But accuracy traditional partial discharge detection method difficult meet requirements new SF6 insulated switchgear. This work analyzes feasibility using high-voltage sensor bushing detect discharge, analysis shows that synchronous signal can be obtained from sensor. Det...

Due to load growth and various types within the service territory, utilities need enhance utilization of substations. In any case, towards coordinated substation design, transformers' most total capacity cannot be reduced just because there is a lack proper coordination between transmission distribution systems. The systems' stability safe operability must investigated in substation. critical i...