Böcker av Ossama Gouda

The use of XLPE insulation for high voltage and extra high voltage power cables is increasing. The new cable systems are installed in the field and inaccurate assembling of cable accessories could result in the precence of deffects.The after laying test is performed in the new cable system to check the quality of cable system installation.Also partial discharge test is usually carried out after cable system maintenance. In this book the author used a new technology for on-site withstand tests and partial discharge measurement of XLPE underground power cable system.In this book two methods of testing are presented ,power frequency test and variable frequency (20-300 Hz)test.

The main purpose of this article is to study the optimum design of grounding system of high voltage substations by using artificial neural network. The proposed study will implement the following important contributions: 1-Performance of grounding system under uniform and non-uniform soil resistivity. 2-Grounding by using equal and non-equal spacing grids studying the performance of non equal spacing grid incase of uniform and non-uniform soil. 3-Grounding by grids and rods in non- uniform soil and unequally spaced grids. 4-Safety analysis of grounding grid with different structures. 5-Designing of ANN as a tool to select the optimum grounding system. 6-Performance of grounding system under transient conditions.