Ground faults in photovoltaic (PV) systems pose a fire and shock hazard. To mitigate these risks, AC-isolated, DC grounded PV systems in the United States use Ground Fault Protection Devices (GFPDs), e.g., fuses, to de-energize the PV system when there is a ground fault. Recently the effectiveness of these protection devices has come under question because multiple fires have started when groun...

Non-effectively grounded power distribution systems (NGDS) are widely used in China and other countries. However, over a long time, single-phase-to-ground faults (SGF) have been misjudged or omitted by the monitoring system, threatening security of supply system human safety. Based on reason analysis for SGFs NGDS, concept NGDS fault eigenparameters to correctly reflect characteristics method S...

It is commonly recognized that correct transformer model (particularly topological one) a key element for any ferroresonance simulations. This paper represents line of reasoning by which reliable voltage (VT) can be constructed given substantial uncertainties in its parameters and characteristics. Starting with catalog data electric steels typical leakage inductances 6-kV VTs, an isolated neutr...

A fault occurs when two or more conductors come in contact with each other or ground. Ground faults are considered as one of the main problems in power systems and account for more than 80% of all faults. This paper focuses on detecting faults on electric power transmission lines. Fault detection have been achieved by using artificial neural networks.

The main aim of this paper is to detection and classifies the various types of ground and line faults in transmission line. A new current decomposition is proposed in order to derive the positive, negative and zero current components. The faults may be an insulation failure of conductors and cables, lightning or accidental faulty operation of any connected equipment. In a transmission line dete...

Abstract Due to the various types and different characteristics of one line-to-ground faults occurring in partial network which is responsible for distribution, adaptability location technology applicable a fault type poor. To ensure operational reliability this thesis shows one-phase ground line selection distribution networks that faults. By using technology, we can comprehensively analyze ph...

the oudna field part of the offshore northeastern tunisia, straddles between two structural domains, the tunisian atlas to the north and the pelagian sea to the south. the study of this field has confirmed adequate petroleum system in fahdene formations (albian-cenomanian) and birsa (serravallian) resulting from the combination of several sedimentary, tectonic and thermal factors. to do this, w...