Abstract The simulation models of the 500kV gas-insulated transmission lines (GIL) and substation (GIS) systems in a realistic nuclear plant are presented paper. Very Fast Transient Overvoltage (VFTO) which is generated during switching operations, analyzed. Some affecting factors on level VFTO investigated. These location power source, entrance capacitance potential transformer (PT), capacitiv...

usually both ends of a transformer winding are at the same side of the magnetic core. with this arrangement there are automaticaly the same number of the turns for each winding in both core windows next to the middle leg of a three phase three leg core type transformer. contrary to this arrangement it is possible to put the two ends of a winding at the different sides of the core. in this case ...

this paper gives a detailed analysis of direct torque control (dtc) strategy in a five-level drive and proposes a 24-sector switching table. the overvoltage problem due to high dv/dt is reduced compared to the 12-sector dtc. using all vectors leads to better flexibility and reduces speed oscillations. simulation and experimental results for a 3kva prototype confirm the proposed solutions. a tms...

Indirect lightning strikes hitting near photovoltaic installations are much more frequent than direct hits, and can generate overvoltage in their electric circuitry. The authors developed a method to estimate the induced on single modules. Using model of whole array also including Inter-Module Coupling Mechanisms (IMCMs), new approach full arrays is presented this paper. procedure first estimat...

This paper reports on the propagation of lightning overvoltage in a high-voltage direct current (HVDC) meshed grid. Since several topologies grids have been elaborated last decade, we used common comprehensive reference test platform. The impulse was investigated with regard to impact surge arresters and polarity stroke concerning DC line (±500 kV). Various scenarios were considered, including ...

This work involves a basic research program that will ultimately enable new solar technology for a highly efficient and low cost water splitting system. The system consists of a unique tandem cell where the sunlight is first incident upon a photocathode, and light transmitted through the photocathode is absorbed in the photoanode. The photocathode generates two electrons per absorbed photon thr...

A contactless power transfer system for charging electric vehicles requires a high efficiency, a large air gap, and a good tolerance to lateral misalignment and needs to be compact and lightweight. A double-sided winding 10 kW transformer based on a 1.5 kW H-shaped core transformer was developed for a rapid charger. Even though the transformer capacity was increased, the dimensions of the 10 kW...