To find feasible alternatives to the use of SF6 in medium voltage switchgear equipment, AREVA T&D and Tsinghua University has started a cooperation to investigate the feasibility of using vacuum. This paper focused on three main points of the design of the Vacuum Insulated Switchgear (VIS): the maintainability of vacuum system, the insulation performance, and the thermal behavior under operatin...

The market requirements for Medium Voltage (MV) metal enclosed switchgear are getting more and stringent. Bothbuilding costs as well the level of transmitted distributed electrical power have increased rapidly over recentyears expected to continue rise. This means that manufacturers must bring compactand powerful systems on market, while being simultaneously cost effective possible. Internal Ar...

The arcing duration of a switching operation is a critical input parameter in condition-based switchgear monitoring algorithms. In this paper we propose a new non-intrusive method that directly measures the duration of the electrical arc discharge during current interruption in switchgear. The method relies on coupling of the VHF electric fields generated by the arc. The required hardware used ...

Based on the heat conduction equation, fluid flow governing equation and radiation heat transfer equation, a multi-physics coupled mathematical model is established, the convection heat transfer problem between solid and fluid is solved by wall function. The three dimensional thermal field in a type of switchgear filled respectively with SF6, N2, and air are calculated and analyzed to discuss t...

Chemical by product diagnostic technique is an efficient, cost-effective and reliable diagnostic technique for gas insulate switchgear condition monitoring in view of its high sensitivity and antiinternal and external electromagnetic interference and noise. In this research paper, coaxial simulated gas insulated switchgear chamber and four different types of artificial defect were designed to c...

In the last ten years we have seen fast development in the computational methods used in all fields of engineering. The possibility of getting rapid and accurate models of High Voltage (H.V.) Switchgear can reduce considerably the high cost of development testing. In this paper the Boundary Element Method (BEM) is discussed from an industrial user point of view. First we analyse the advantages ...

A new concept of a high-voltage switchgear on-line monitoring system (BMS Bay Monitoring System) is described. Main features and benefits of BMS are simple ethernet-based communication which means simple LAN connectivity with other systems in a switchgear, reliable data collection, reliable controller operation, reliable power supply, quick access to data and a quick and simple retrieval of sto...

Metal-enclosed switchgear, which are widely used in the distribution of electrical energy, play an important role in power distribution networks. Their safe operation is directly related to the reliability of power system as well as the power quality on the consumer side. Partial discharge detection is an effective way to identify potential faults and can be utilized for insulation diagnosis of...

In power energy distribution networks, switchgear is considered critical equipment. This because the act of monitoring operation and condition switchgear, as well performing required corrective maintenance on any potentially problematic equipment, critical. A single event may harm thousands customers over time pose a significant risk to operational staff. Many considerations must be put in plac...