Userfriendly data entry, efficient analysis algorithms and powerful graphical facilities make the cymgrd software an efficient tool to help the engineer arrive at technically sound and economical designs. Ieeee std 80 is by far and away the most controversial standard in the ieee library, and is considered one of. My question is regarding meth sizes, and conductor spacing. Lightning protection is excluded from the scope of this calculation refer to the specific lightning protection calculation for more details. Ieee p80d98 draft guide for safety in ac substation. With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to substations that are wholly indoors. This introduction is not part of ieee p80d5, draft guide for safety in ac substation grounding. The cymgrd software is a substation grounding grid design and analysis.
The etap software version 12 is used for modeling and analysis of network. For the shape of my particular substation, i had to use finite element method, and not the ieee 80. Before the software can aid the substation design engineer, the electrical single line and ground grid for the substation will have to be designed and modeled. Ieee 80 gives formulas to design grounding system for uniform soil model and help of software is taken for two. Ieee std80 is the ieee guide for safety in ac substation grounding. Estimating split factor using annex c in ieee 80 va3mnr electrical 31 jan 17 18. Important formulas for designing a substation grid earthing system. Ieee p80d98 draft guide for safety in ac substation grounding. The ground grid system of substation has to be carefully analyzed in order to. List all data that must be known in the starting of grounding system design calculations for ac substation, facilitate the design process by using the auto excel mathematical functions in performing the calculations, provide a professional design concept for any grounding system of ac substation as per standard ieee 80 2000. 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. Jul, 2017 earthing of ac substation basic part 1, consist of basics about earthing design in ac outdoor substation. Home download center electrical software earthing mat design for substation. Determine the required grid conductor specifications, compute the substation grounding resistance and study the effect of resistance formula.
Provide conceptual grounding system a for the substation, including design. Optimal design and development of software for design. The software analysis helps illustrate and support the grounding study results for your substation project. Ieee 80 enhanced to improve understanding of standard for. Over the years grounding design terms and definitionsprocedures have been developed as well as appropriate standards, most notable. This is an unapproved ieee standards draft, subject to change. Optimal design of the grounding grid by fem considering different. The viability of results of developed tool are compared with worldwide software s like etap and cymgrd and showed to be reliable, friendly user interface, easy. Ieee std 4872007, recommended practice for the protection of wireline communication facilities serving electric supply locations. Pdf optimized design of substation grounding system. Ieee std 80tm equations to commerciallyavailable software programs.
Cyme power engineering software and solutions optimize the design of new grids and reinforce existing grids the use of the cymgrd software allows for the rapid analysis of various design alternatives to choose an economical solution for any particular installation. Surveys have shown that as many as 80% of the utility engineers doing groundgrid design around the world either directly or indirectly rely on ieee 80. The standard defines, in general terms, parameters that should be used andor considered in the substation grid design. Importance of an adequate substation ground grid design. Review of substation grounding practices, safety and. Earthing mat design for a power substation ms excel.
Outdoor ac substations, either conventional or gasinsulated, are covered in this guide. Proper soil modelling helps in accurate designing of grounding system of substation. The program conforms to ieee 80 2000, ieee 81 1983 and ieee 837 2002. Part 2 will cover the tolerable step and touch voltage. Optimized design of substation grounding system using. Ground grid systems software ground grid design ieee 80. Ansiieee std 802000, ieee guide for safety in ac substation grounding. Inequality constraints of ground potential rise gpr, ground resistance rg, step voltage estep and touch voltage etouch, are based on latest edition of ansiieee std. The intent of this guide is to provide guidance and information pertinent to safe grounding practices in ac substation design. Grounding design calculations part seventeen electrical. Xgslab is one of the most powerful software for electromagnetic simulation for power, grounding and lightning protection systems and the only software on the market that takes into account international iects 604791.
The ieee 80 design requires that minimum spacing between conductors is 2. Ieee 80 is the worlds primary source for guidance on ac substation grounding, said richard keil, chair of the ieee 80 grounding working group. An introduction to grounding calculations and why they are. This fourth fifth edition represents the second third major revision of this guide since its. Is using cdegs for design of the substation earthing. This paper describes development and use of software economical substation grounding system designer esgsd which implements theoretical concepts given in ieee standard 80 2000 into programming environment. Soil measurement data based on wenner fourpin method. Video 1 earthing of ac substation basic part 1 youtube.
Wellman, optimal ground grid design for large ehv substations with autotransformer, publication no. Optimized design of substation grounding system using newly. Ieee 8020 ieee guide for safety in ac substation grounding. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short. Pdf optimized design of substation grounding system using. The use of the cymgrd software allows for the rapid analysis of various design alternatives to choose an economical solution for any particular installation. 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. Jul 23, 2015 the changes defined in ieee 8020cor 12015, ieee guide for safety in ac substation grounding corrigendum 1 have been incorporated into ieee 8020. Simgrid markets cymgrd software and provides technical support as well as trainings. Ieee std 80 is the ieee guide for safety in ac substation grounding. Design analysis and optimization of ground grid mesh. Cymgrd conforms to ieee 80 2000, ieee 81 1983 and ieee 837 2002.
I used etap software to design 44kv substation ground grid. Methodology adopted for designing the grounding grid is as per ieee standard 80 2000. Ieee 80 grounding system analysis for solar farm in. The methodology adopted for designing is based on ieee std. 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. Design and analysis of substation grounding grid with and. Grounding system design of substation using matlab program ieee. Ieeee std 80 is by far and away the most controversial standard in the ieee library, and is considered one of the most difficult standards to understand. Step and touch potentials, ground potential rise, absolute potential, ieee std. Two day national conference rteece2014 17th,18th january 2014 90 gaining basic knowledge about grounding system design.
Inequality constraints of ground potential rise gpr, ground resistance rg, step voltage estep and touch voltage etouch, are based on latest edition of ansi ieee std. List all data that must be known in the starting of grounding system design calculations for ac substation, facilitate the design process by using the auto excel mathematical functions in performing the calculations, provide a professional design concept for any grounding system of ac substation as per standard ieee 802000. Electrical engineers use powertools to perform harmonic analysis, transient stability analysis, short circuit analysis, and to determine demand load, voltage drop, arcflash hazard analysis and protective device coordination. In our opinion computer modeling is the only viable and ethical way to design a substation grounding grid. Importance of an adequate substation ground grid design 3. Introduction the design consideration of substation grounding is important for providing low resistance path to ground, to allow. Ieee has announced enhancements to ieee 80, ieee guide for safety in ac substation grounding. The ground grid has been designed in cdegs software using fault current flow concepts, with multiple injection points simulating. Ieee 80 enhanced to improve understanding and expand. Ground grid systems software ground grid design ieee.
No attempt is made to cover the grounding problems peculiar to dc substations. The guide presents more detailed information on the methods used to determine the current value to be used in the guide design equations and presents new equations to determine the current capabilities of bimetallic materials that can be used in ground grids. Methodology adopted for designing the grounding grid is as per ieee standard 802000. Cyme power engineering software and solutions substation. Optimized design of substation grounding system using newly developed ieee compliant software issn. Power systems engineers can use the software cymgrd to design grounding facilities for substations. Calculate tolerable safety limits in accordance with ieee standard 80 and demonstrate that they are met by the proposed grounding design. Design of earthing grounding system in a substation grid. Ieee 80 grounding system analysis for solar farm in kingston. The optimized ground grid meets the ieee80 standards for safety without compromising on step or touch potential thresholds. The canadian software cymgrd allows to perform soil resistivity measurement interpretations, elevation of ground potential rise and danger point evaluation within any area of interest.
Ieee std 8020 guide for safety in ac substation grounding ieee std 812012 guide for measuring earth resistivity, ground impedance, and earth surface potentials of a ground system ieee std 3672012 recommended practice for determining the electric power substation ground potential rise and induced voltage from a power fault. 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. 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. The viability of results of developed tool are compared with worldwide softwares like etap and cymgrd and showed to be reliable, friendly user interface, easy. Optimal design and development of software for design of substation. Earthing mat design for substation spreadsheet photo by input fields as per ansi ieee std 80 1986 code. Moreover this program also allows two layered soil modeling which is. Earthing of ac substation basic part 1, consist of basics about earthing design in ac outdoor substation. This calculation is based primarily on the guidelines provided by ieee std 80 2000, guide for safety in ac substation grounding. Sep, 2017 this webinar, given by michael antonishen, p. Ieee 80 is the worlds primary source for guidance on ac substation grounding. The formulas used in this program are cited from previous literatures and followed the ieee802000.
This paper discusses alternate design approach for substation grounding in areas that have high soil resistivity. Ieee 80 grounding system analysis for solar farm in kingston this presentation will have a brief introduction to the basics of substation grounding as per ieee 80 and will describe the analytical methodology, performance results and the grounding. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code. Fast analysis of irregular largescale renewable ground grid application. Rapid analysis and safety evaluation for various earthing grid configurations for determination of most economical design. Goal of wtg grounding is to meet ieee 80 touch and step voltages at wtgs and gsus along collector circuits most software and hand calculations are insufficient for such a large interconnected system typical approach requires modeling the entire system or. Distribution, transmission, and generating plant substations are also included. This software has been designed using matlab as a mathematical tool. This guide is primarily concerned with outdoor ac substations, either. The changes defined in ieee 8020cor 12015, ieee guide for safety in ac substation grounding corrigendum 1 have been incorporated into ieee 8020.
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