The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper deals with the calculation of ground resistance, surface voltage, touch voltage and step voltage, to mesh with horizontal wires arranged in different angles. The mathematical modeling is based on the method proposed by Heppe, which allows obtaining the grounding parameters for soil stratified in two layers. Moreover, the results obtained by the Variable Currents Method (VCM) have been compared...
Grounding grid is an important equipment to guarantee the safety and reliable of power system. It should be diagnosed regularly to prevent from corrosion, which is significant to ensure the safety of people and equipment. It has a significant value to do some research on the algorithm of grounding grid diagnosis. Contact voltage, step voltage and ground resistance are the most important characters...
This paper presents touch voltage reduction technique for uniform and two-layer soil by applying grid compression ratio. The design of ground grid is discussed pertinent to its maximum touch and step voltage produced for a given GPR. The parameters are analyzed to ensure that they conform to the IEEE 80-2000. It is found that, for a given GPR, the maximum touch and step voltages of the rectangle grid,...
High Voltage (HV) transmission lines are widely spread around residential places. They take all forms of shapes: concrete, steel, and timber poles. Earth grid always form part of the HV transmission structure, whereas soil resistivity value is one of the main inputs when it comes to determining the earth grid requirements. In this paper, the soil structure and its implication on the electrode resistance...
This paper presents the application of coupled 1D and 2D isoparametric discontinuous boundary elements for calculation of large grounding systems. Indirect method of boundary elements was applied. Parts of long thin grounding conductor (e.g., tapes, grids, mashes or rods) are discretization with a 1D linear isoparametric discontinuous boundary elements. Boundary surfaces of solid grounding conductor...
This study presents an advanced methodology and a computer model for analysis of grounding systems conforming to standards IEEE Std 80-2000, IEEE Std 81- 1983 and IEEE Std 837-2002. The methodology and computer program is validated with actual system measurements. The accuracy of computer algorithm is dependent on how well the soil model and physical layout reflect actual field conditions. The tolerable...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.