This module can evaluate the estimate places for the danger voltage points in the grid and its. Eatons cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape, by virtue of easy to use, builtin danger point evaluation facilities. Calculationofimportantdesignparametersforgroundingsystemsinsu. Grounding design calculations part four electrical knowhow. Ground mat earth grid design software jpflying electrical op. Etap model for earth mat design etap model for earth mat design. Etap which is an intelligent software for many applications. Optimal design of substation grounding grid based on genetic. When the substation has a lightning accident or an internal fault of the power system, the grounding grid can provide a low impedance path to high current. This voltage, gpr, is equal to the maximum grid current times the grid resistance. Earthing system is made of a mesh of buried bare copper cable, with additional earth rods, and shall be calculated, being recommended to use ieee std. This rise in voltage of the grounding grid is referred to as the ground potential rise gpr, and is proportional to the magnitude of the fault current, and the ground resistance of the grounding grid. Design and analysis of substation grounding grid with and without considering seasonal factors using edsa software mithun mondal, dr r. Safegrid earthing and grounding design software youtube.
Design of substation grounding grid using edsa software ieee. It had a characterbased dosbased menu interface and was called. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code. Safegrid earthing and grounding design software elekcomau. Application software for analysis and design of grounding grids of substations based on the requirements of the ieee 80 ieee guide for safety in ac substation grounding. Simgrid markets cymgrd software and provides technical support as well as trainings. The autogrounddesign package performs automated analyses of grounding earthing systems of any arbitrary perimeter and identifies an economical grid configuration complying with userdefined safety criteria that can be used as the design for grounding grids that are electrically small enough to be considered equipotential. The ground grid module enables engineers to quickly design and analyze ground protection using advanced 3d technology that is integrated with the one line. Introduction in designing and construction of an electric substation, one of the most important issues that must be. Electrical grounding analysis skm groundmat is a program for substation ground grid design and analysis. The best software for this purpose is electrical transient analyzer program etap. Importance of an adequate substation ground grid design 3. The maximum electrical potential that a substation grounding grid may attain relative to a distant grounding point assumed to be at the potential of remote earth.
Optimized design of substation grounding system using newly developed ieee compliant software issn. Fast analysis of irregular largescale renewable ground grid application. Computer software packages can be used to assist in earthing grid design by modeling and simulation of different earthing grid configurations. The maximum touch voltage within a mesh of a ground grid. I have a node on either side of the transformer and have connected the ground grid on the primary side. Computer models and test results show close correlation, including predicted touch voltages in and around the sites. The process is a combination of science and art as opposed to pure science, because it is necessary to test the.
Easypower is partnering with the industryleading grounding and emi analysis. Eaton s cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape, by virtue of easy to use, builtin danger point evaluation facilities. Design and analysis of substation grounding grid with and. It may be used to make a new design for new grids or to optimize and enhance an existing one of any shape.
Grounding design calculations part seventeen electrical. Methodology adopted for designing the grounding grid is as per ieee standard 802000. Safegrid earthing design software complies with ieee std. Achievement of the best design for unequally spaced. It uses a generalpurpose finite element algorithm for potential analysis and graphical facilities to validate ground system efficiency. Overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. Introduce a final report contains all design details. Sim grid markets cymgrd software and provides technical support as well as trainings. As the most important parameter of the grounding system, the grounding resistance has always been the focus of researchers research. It is a type of application software which is used for power engineering problems, which are transformed.
Cdegs is a computerbased electrical engineering modeling software program that uses ieee 80 calculations as a base, but additionally takes into account multilayer soils and all the other engineering factors mentioned above. Elek safegrid earthing and grounding design software. Easypower is partnering with the industryleading grounding and emi analysis expert company, sint ingegneria website, which offers a software package to analyze and design grounding, lightning and electromagnetic interference problems by focusing on its powerful and yet affordable grounding analysis software packages, xgslab. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short. The grounding grid provides a common ground for the electrical equipment as well all the metallic structures in the substation. The large number of nodes in these extensive earth grids makes them a particular challenge, but safegrid manages them with ease, and elek have provided excellent technical. Effective grounding system design of substation grounding grid using edsa software ieee conference publication. Grounding grids, mats, and sheets are commonly made of copperclad wire and solid copper grounding electrodes with bonded connections. Grounding grid integrity testing ground grid integrity testing setup. It had a characterbased dosbased menu interface and was called autogrid. We use safegrid earthing software for the design of earth grid on complex renewable energy projects, including anaerobic digestion plants, wind farms and solar farms. Optimal design and development of software for design of.
This paper presents the design of 220kv substation grounding grid with difference resistivity soil according to horizontal and vertical two layer soil model is structure using the malt program of. Feb 02, 2014 safegrid earthing design software complies with ieee std. How to calculate fault current in electrical substation. List all applicable standards for grounding system design calculations for domestic, commercial and industrial premises, list acceptable values for earthing resistance, calculate soil resistivity by using ground testers that apply the wenner 4point method, provide a professional design concept for any grounding system.
Grounding grid dimensioning for electrical substations. Sep 12, 2014 overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. Designing for a low resistance earth interface grounding roy b. Represents a new way to study large grounding systems. Ground grid systems software capabilities fast analysis of irregular largescale renewable ground grid application. This software has been designed using matlab as a mathematical tool. The results confirmed both the ground grid design and the effectiveness of the test equipment. Ground mat earth grid design software electric power. Ground grid systems software ground grid design ieee. Easypower is partnering with the industryleading grounding and emi analysis expert company, sint ingegneria, which offers a software package to analyze and design grounding, lightning and electromagnetic interference problems by focusing on its powerful and yet affordable grounding analysis software packages, xgslab. Etap model for earth mat design etap model for earth. The large number of nodes in these extensive earth. Calculationofimportantdesignparametersforgroundingsystemsi. It was restricted to rectangular grids buried in uniform or twolayer horizontal soils.
Aspix calculates the grid resistance, and touch and step voltages for grids of any shape. Two other important design parameters, which depend upon the value of the ground. The problem is formulated as a mixedinteger linear. Civil and electrical engineers need pointed analyses that assure installations are fully secure for personnel and also sound and economical construction, connection and operation of the grids along with proper equipment protection. It is a type of application software which is used for power engineering problems, which are transformed into mathematical expressions. Optimal design of substation grounding grid based on. Cymgrd is a software program specialized in the substation grounding mat design.
Joe is a principal engineer in the substation engineering department at xcel energy and has held many roles in the department since 1998. Etap facilitates an engineer to carry out ground grid. The design of grounding grids for substations and buildings is a vital part of the overall power system infrastructure assuring constant power supply to consumers. Review of substation grounding practices, safety and constructability enhancements authors.
Most of the design inputs and assumptions for developing a substation ground grid design will usually be provided by the utility or power company. Achievement of the best design for unequally spaced grounding grids. These assumptions and inputs are required to help facilitate the findings aided by grounding analysis software to ensure an adequate ground grid design for human. If it is so designed, you may introduce it in the calculation as a grounding rod. The program can use uniform or two layer soil models. Milan asks, i am trying to understand how to design a substation grounding system and fault current is something i am not getting. Attention please do you want to learn basics of electric circuits and. For example, for a small substation with some transformers, if there is a fault in the system how will the fault current flow into the grounding system. Design of earthing grounding system in a substation grid. Important formulas for designing a substation grid earthing system. This brochure describes eaton s cyme cymgrd software which is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape.
Is also useful for magnetic field and electromagnetic interference evaluations. Importance of an adequate substation ground grid design. Designing for a low resistance earth interface grounding. Lanzoni october 2007 introduction grounding or earthing is the art of making an electrical connection to the earth. Neplan grounding, electromagnetic fields, interference. Individual component modeling like grid conductors and ground rods, description of individual components with a set of equations, groundfault current calculation flowing into the earth. Grounding grid design software computer algorithms for modeling ground systems are based on. Other design factors include touch potential and step potential. Both new and existing switchyard grounding grids have been tested using this instrumentation.
Wellman, optimal ground grid design for large ehv substations with autotransformer, publication no. Safegrid earthing electrical calculations and design software. Dont forget to subscribe to our channel for more awesome videos. The main purpose of this work is the development of an optimization model for the design of the grounding grid in electrical substations. Home download center electrical software earthing mat design for substation. Review of substation grounding practices, safety and.
Easypower is partnering with the industryleading grounding and emi analysis expert company, sint ingegneria, which offers a software package to analyze and design grounding, lightning and electromagnetic interference problems by focusing on its powerful and yet affordable grounding analysis software packages, xgslab easypower is the exclusive representative. Size and shape depend on soil resistivity, fault duration, area and geometry. Earthing mat design for a power substation ms excel. Ground grid systems software ground grid design ieee 80. Two other important design parameters, which depend upon the. A grounding ring at the lowest level will collect all the groundings from all foundations and from here all the electrical equipment will be bonded. A new optimization design for grounding grid sciencedirect. Substation system software applications cyme grids eaton. Design of substation grounding grid using edsa software. If you dont mind answering, i have a simple model that i am trying to obtain a gpr on, basically it consists of a utility power source, 444.
Two day national conference rteece2014 17th,18th january 2014 88 optimized design of substation grounding system. The same test equipment is available for 60hz systems where the injection current and tuned voltmeters are set at 52 hz. Mortezaeei 2 1 electrical engineering department, seraj higher education institute, tabriz, iran, n. The grounding system parameters can be measured without deenergizing the substation. Grounding grid dimensioning for electrical substations, primary and secondary transmission and distribution, telecommunications, lightning protection and lowvoltage installation with over 25 years of development, tecat plus is the best cost benefit solution on the market, with full numerical calculations in 4 layer soil one of the best in. In this paper two different approaches were used to achieve the best design configuration of grounding grid as increasing sequential multiplication factor. It is designed to help optimize grid design or reinforce existing grids of any shape. After graduation joe worked in the mining industry in northeastern minnesota for ten years.
Optimized design of substation grounding system using newly. The cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and reinforce existing grids, of any shape, by virtue of easy to use, builtin danger point evaluation facilities. In our opinion computer modeling is the only viable and ethical way to design a substation grounding grid. Optimized design of substation grounding system using. Soil measurement data based on wenner fourpin method. Even ieee std 80 recommends the use of computer software to calculate grid resistances, and mesh and step voltages, and also to create potential gradient visualisations of the site.
Cdegs current distribution, electromagnetic interference, grounding and soil structure analysis is a powerful set of integrated software tools designed to accurately analyze a variety of electromagnetic related problems encountered in all industries involving electric networks. System grounding and earthing types analysis software etap. Power engineering software is software used to create models, analyze or calculate the design of power stations, overhead power lines, transmission towers, electrical grids, grounding and lightning clarification needed systems and others. Ses implemented the first automated grounding grid design software in the early 90s. Design earthing or grounding grid using etap in english youtube. Is a module for earth grid calculation and design in the frequency domain, including soil analysis and represents the state of the art of grounding software. Skm groundmat is a program for substation ground grid design and analysis. Pdf grounding system design in electrical substation. The resulting earthing types are displayed both on the one line diagram and for the various connected cables.
1567 963 1283 107 318 1508 88 727 810 1449 1468 1162 1461 964 1109 1191 699 1588 1237 691 333 854 491 120 647 1257 528 218 1238 210 776 718 130 893 803 406 999 1038 434 1109 1025 58