Ieee 80 enhanced to improve understanding and expand. Safegrid earthing electrotechnik pty ltdelectrical. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code. Design of earthing grounding system in a substation grid. Ieee std 4872007, recommended practice for the protection of wireline communication facilities serving electric supply locations. This software has been designed using matlab as a mathematical tool. 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. 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. 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. The optimized ground grid meets the ieee80 standards for safety without compromising on step or touch potential thresholds.
Step and touch potentials, ground potential rise, absolute potential, ieee std. Simgrid markets cymgrd software and provides technical support as well as trainings. 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. Fast analysis of irregular largescale renewable ground grid application. Jul, 2017 earthing of ac substation basic part 1, consist of basics about earthing design in ac outdoor substation. Over the years grounding design terms and definitionsprocedures have been developed as well as appropriate standards, most notable. The use of the cymgrd software allows for the rapid analysis of various design alternatives to choose an economical solution for any particular installation. Ieee std 80tm equations to commerciallyavailable software programs. Ieee 80 grounding system analysis for solar farm in. Ground grid systems software ground grid design 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.
Rapid analysis and safety evaluation for various earthing grid configurations for determination of most economical design. Cymgrd conforms to ieee 80 2000, ieee 81 1983 and ieee 837 2002. This guide is primarily concerned with outdoor ac substations, either. 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. Optimized design of substation grounding system using newly developed ieee compliant software issn. The changes defined in ieee 8020cor 12015, ieee guide for safety in ac substation grounding corrigendum 1 have been incorporated into ieee 8020. Design and analysis of substation grounding grid with and. 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. Distribution, transmission, and generating plant substations are also included. Grounding design calculations part seventeen electrical. 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.
Ieee 80 grounding system analysis for solar farm in kingston. The intent of this guide is to provide guidance and information pertinent to safe grounding practices in ac substation design. Home download center electrical software earthing mat design for substation. Cyme power engineering software and solutions substation. I used etap software to design 44kv substation ground grid. Sep, 2017 this webinar, given by michael antonishen, p. Power systems engineers can use the software cymgrd to design grounding facilities for substations. Design analysis and optimization of ground grid mesh. 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. The formulas used in this program are cited from previous literatures and followed the ieee802000. 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. Ieee 80 enhanced to improve understanding of standard for. Methodology adopted for designing the grounding grid is as per ieee standard 80 2000.
Optimal design of the grounding grid by fem considering different. A new annex presents benchmarks that compare the ieee equations with commercially available software. This calculation is based primarily on the guidelines provided by ieee std 80 2000, guide for safety in ac substation grounding. The methodology adopted for designing is based on ieee std. The ieee 80 design requires that minimum spacing between conductors is 2. Ieee p80d98 draft guide for safety in ac substation. Ieee 80 is the worlds primary source for guidance on ac substation grounding. 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. Optimal design and development of software for design. 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.
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. The program conforms to ieee 80 2000, ieee 81 1983 and ieee 837 2002. Proper soil modelling helps in accurate designing of grounding system of substation. 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.
Two day national conference rteece2014 17th,18th january 2014 90 gaining basic knowledge about grounding system design. An introduction to grounding calculations and why they are. Ieee 80 is the worlds primary source for guidance on ac substation grounding, said richard keil, chair of the ieee 80 grounding working group. Grounding system design of substation using matlab program ieee. Ieee std 80 is the ieee guide for safety in ac substation grounding. 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. 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. Outdoor ac substations, either conventional or gasinsulated, are covered in this guide. Review of substation grounding practices, safety and.
Pdf optimized design of substation grounding system. 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. 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 analyzing standalone wtgs, which requires a split factor. 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.
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. My question is regarding meth sizes, and conductor spacing. Optimized design of substation grounding system using newly. 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. The software analysis helps illustrate and support the grounding study results for your substation project. 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. Soil measurement data based on wenner fourpin method.
Video 1 earthing of ac substation basic part 1 youtube. The standard defines, in general terms, parameters that should be used andor considered in the substation grid design. 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. Optimal design and development of software for design of substation. 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 p80d98 draft guide for safety in ac substation grounding. Ieee 8020 ieee guide for safety in ac substation grounding. Responsibility of keeping the substation safe is upon the grounding system installed within it. Ansiieee std 802000, ieee guide for safety in ac substation grounding. The cymgrd software is a substation grounding grid design and analysis. Ieee std80 is the ieee guide for safety in ac substation grounding. Pdf optimized design of substation grounding system using. Wellman, optimal ground grid design for large ehv substations with autotransformer, publication no. Provide conceptual grounding system a for the substation, including design. For the shape of my particular substation, i had to use finite element method, and not the ieee 80. Part 2 will cover the tolerable step and touch voltage.
The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short. Optimized design of substation grounding system using newly developed ieee compliant software is reported by vyas et al. Optimized design of substation grounding system using. Determine the required grid conductor specifications, compute the substation grounding resistance and study the effect of resistance formula. This fourth fifth edition represents the second third major revision of this guide since its. Ieeee std 80 is by far and away the most controversial standard in the ieee library, and is considered one of. 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. The ground grid system of substation has to be carefully analyzed in order to. The etap software version 12 is used for modeling and analysis of network. Methodology adopted for designing the grounding grid is as per ieee standard 802000. Ieee 80 gives formulas to design grounding system for uniform soil model and help of software is taken for two.
Lightning protection is excluded from the scope of this calculation refer to the specific lightning protection calculation for more details. Ground grid systems software ground grid design ieee 80. Is using cdegs for design of the substation earthing. Calculate tolerable safety limits in accordance with ieee standard 80 and demonstrate that they are met by the proposed grounding design. Importance of an adequate substation ground grid design. 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. 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. Earthing of ac substation basic part 1, consist of basics about earthing design in ac outdoor substation. Importance of an adequate substation ground grid design 3. With proper caution,the methods described herein are also applicable to indoor portions of such substations, or to substations that are wholly indoors. In our opinion computer modeling is the only viable and ethical way to design a substation grounding grid.
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