A ground grid mat study will determine if your substation grounding grid design is safe and will limit the touch and step potential to values below the ieee 80 standard ieee guide for safety in ac. 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. Some substation designs require fence grounding to be isolated from the main ground grid. Build custom earthing systems, using finiteelements determine a safe design overview features videos screenshots faq testimonials training overview determine earthing system performance, touch and. Soil measurement data based on wenner fourpin method. Design of earthing grounding system in a substation grid. 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. Grounding grid design using matlab for power substations. 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 within.
A ground grid mat study will determine if your substation grounding grid design is safe and will limit the touch and step potential to values below the ieee 80 standard ieee guide for safety in ac substation grounding limits. Code of practice for design of highvoltage openterminal stations. Cymgrd is a software program specialized in the substation grounding mat design. This module can evaluate the estimate places for the danger voltage points in the grid and its adopting with ieee 802000 std. Resistance of surface material crushed rock thickness of surface material crushed rock depth of earthing grid conductor. Eatons cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids. Skm groundmat is a program for substation ground grid design and analysis. Design of groundmat for 11kv sub station using auto grid pro jawahar m assistant professor, dept. Sonagra3 1pg student 2, 3assistant professor 1 2 3electrical department, g. Design and analysis of ground grid system for substation. Thank you for your question regarding substation design using cdegs and ieee std80 formulas.
It keeps the maximum voltage gradient along the surface inside and around the substation within safe limits during ground fault. Is using cdegs for design of the substation earthing. Fault level of the station can be calculated using softwares. Our substation design solution reduces the amount of time to complete design and minimizes errors that cause rework during construction. Earth mat design can be done by manual calculations as well as with the help of computer software. The software analysis helps illustrate and support the grounding study results for your substation project. Overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. Ses implemented the first automated grounding grid design software in the early. Can u send me the details required to design an earth mat for 3311 kv pss.
Omega red group are the uk market leaders in the specialist design, supply, installation, testing and maintenance of electrical earthing and lightning protection systems. Earth mat is preferable to large substations because of space saving on the ground level due to substantial reduction of earth pits which leads to ease of coordination. Though manual calculation is a good, software tools ensure a detailed design so that the earth mat is. Guidelines for the design, installation, testing and maintenance of main earthing systems in substations. This course will comprehensively cover grounding system design procedures for safety and lightning shielding. Home download center electrical software earthing mat design for substation. 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. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 80. 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. The earthing systems for a substation must have a minimum design life of 50 years. Design of groundmat for 11kv substation using auto grid pro. A substation is assembly of large no of electrical. Here, the design uses etap electrical transient analyzer program software. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code.
Design of groundmat for 11kv substation using auto grid. Jul 15, 2015 our substation design solution reduces the amount of time to complete design and minimizes errors that cause rework during construction. Integrated grounding system design and testing gtpe. In high and medium voltage air insulated substations ais the electromagnetic field, which causes are the static charges of bare cable and conductors and by the. Optimal design of substation grounding grid based on genetic. Ground grid systems software ground grid design ieee 80. Design of earth grid for a 3311kv gis substation at a. In a properly designed system, this gradient should not exceed the limits that can be tolerated by the human body. A welldesigned substation ground grid can uphold human safety for authorized personnel working in or around substations.
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. It uses a generalpurpose finite element algorithm for potential analysis and graphical facilities to validate ground system efficiency. Build custom earthing systems, using finiteelements determine a safe design overview features videos screenshots faq testimonials training overview determine earthing system performance, touch and step voltage safety compliance. Design of earth grid for a 3311kv gis substation at a high. Earth mat designing of substation free download as powerpoint presentation.
Electricity association technical specification 41. When a fault condition occurs, the grounding electrode grid must be sufficient to equalize potentials both in and around the substation. The supporting data has been obtained from actual field tested at the substation. Etap model for earth mat design etap model for earth mat design. Oct 30, 2012 in this video, i mentioned the basic steps for designing power substation grounding grid using custom codeprogram made under matlab environment. The grid spacing will be closer in the proximity of electrical equipment, and will be connected at all conductor intersections.
The purpose of a ground mat study is to provide for the safety and wellbeing of anyone that can be exposed to the. Here are some additional ground mats that we provide to the electrical substation industry. In a properly designed system, this gradient should not exceed the limits that can be tolerated by the. Substation owners can now receive information to confirm system design specifications, while ensuring safety, with the new digital version of the smart ground multimeter sgm. Pdf earth mat design for 233kv substation in rivers. A good grounding system can also help prevent equipment damage during fault conditions, direct lightning strikes, etc. Electricity association technical specification 4124. The ground grid module enables engineers to quickly design and analyze ground protection using advanced 3d technology that is integrated with the one line. Design of grounding system for an electrical substation. Electrical 20142018 sardar vallabhbhai institute of technology, vasad. Calculation of maximum permissible touch and step voltages.
The cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and industrial sites. Substation grounding grid design case study using matlab. The grounding grid system of a practical 220 kv substation is calculated by matlab program. Userfriendly data entry, efficient analysis algorithms and powerful graphical facilities render substation grounding software an efficient tool that helps the engineer arrive at. Sep 12, 2014 overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. Substation design instruction sdi 505 minimum design and construction requirements for transmission and zone substations and switching stations substation design instruction sdi 511 auxiliary ac supply and switchgear substation design instruction sdi 517 busbars and support insulators. Importance of an adequate substation ground grid design. Importance of an adequate substation ground grid design 3. Though manual calculation is a good, software tools ensure a detailed design so that the earth mat is neither underdesigned hence safe nor this paper presents the complete design of earth mat for a 3311kv indoor gis gas insulated switchgear.
Based on experience and on the substation ground bonding requirements. The autogrounddesign software package is the only fully automated software tool that can analyze and design grounding systems without the intervention of the user between various phases of the design. It may be used to make a new design for new grids or to optimize and enhance an existing one of any shape. In this video, i mentioned the basic steps for designing power substation grounding grid using custom codeprogram made under matlab environment. In high and medium voltage air insulated substations ais the electromagnetic field, which causes are the static charges of bare cable and conductors and by the atmospheric conditions surges, induce voltages at nolive parts of the installation that create potential differences between metallic parts and ground and also between different points of. What does a good grounding of the power substation and. Major substation earthing design, construct and commissioning. Ground mat earth grid design software electric power. The cymgrd software enables choosing the most economical way for any installation.
Optimal design of substation grounding grid based on. Fast analysis of irregular largescale renewable ground grid application. International journal of enginee ring trends and technology ijett volume 15 number 8. Speed project collaboration and coordination with the only software that lets you unite electrical and physical design. 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.
Ieee std80 is the ieee guide for safety in ac substation grounding. Abstract the main purpose of this paper is to acquaint the reader with various types of grounding. It begins with a simplified coverage of the basic principles in grounding design and follows. The use of substation grounding software allows for the rapid analysis of various design alternatives to choose an economical solution for any particular installation. Sizing conductors a critical part of safety grounding is the. A ground grid mat study will determine if your substation grounding grid design is safe and will. Development of economical substation grounding system designer ieee guide 7 demonstrates guide lines for design of grounding systems for hv ehv ac substations, considering its performance at. This software package offers powerful and intelligent functions that help electrical engineers design safe horizontal, arbitrarily shaped. Ground mat earth grid design software simmi123 electrical 6 jul 08 18. International journal of engineering trends and technology. The elevated design gives the substation employee the ability to be on an elevated above the snow line platform, as well as a grounded mat.
Substation grounding is critical part of substation design. Grounding is used to get a reference point to measure voltage, to get a common return path for current and to physical connection of body. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Earth mat minimizes the danger of high step or touch voltages in critical operating areas or places that are. This module can evaluate the estimate places for the danger. Bhuj, india abstract substation grounding is a critical part of the overall electric power system. Here are some additional ground mats that we provide to the. Surge arresters or lightning arresters discharge the over voltage surges to earth and protect the equipment insulation from switching surges and lightning surges. Know the grounding design procedure for ac substations, performing grounding design calculations for ac substations, use the excel spreadsheets for grounding system design for domestic, commercial and industrial facilities and ac substations. Ground grid systems software ground grid design ieee. Cyme power engineering software and solutions substation. Earthing mat design for a power substation ms excel spreadsheet. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and.
Is using cdegs for design of the substation earthing system. Design and analysis of ground grid system for substation using etap software and fdm code in matlab deep b. It begins with a simplified coverage of the basic principles in grounding design and follows with a stepbystep design procedure. Highvoltage equipment, substructures, cable ducts, wires, tubes, clamps, roads and fences can be easily selected from a comprehensive library and placed as intelligent 3d objects on a voltagedependent grid. You will explore soil characterization, modeling requirements, and data preparation procedures for substation ground system design and lightning shielding. Avoid rework, reduce errors, and enhance collaboration with linked and crossreferenced 3d layouts and electrical drawings. Earthing mat design for a power substation ms excel. It is designed to help optimize grid design or reinforce existing grids of any shape.
Know the grounding design procedure for ac substations, performing grounding design calculations for ac substations, use the excel spreadsheets for grounding system design for domestic, commercial. Program is designed as per ansiieee 80 code, it calculates step potential of switchyard, touch potential of. Grounding design calculations part seventeen electrical. Responsibilities the group manager works enablement is the process owner responsible for approving this reference. All substation earthing systems must be designed to ensure the following functional requirements are met. All rus borrowers rus electric staff effective date. Optimized design of earthing system for substations with high soil. Electrical 20142018 sardar vallabhbhai institute of technology, vasad vadodara, india abstractthe paper depicts about design of ground grid system for 6611kv rectangular substation. Etap model for earth mat design etap model for earth. Cymgrd, substation grounding program 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. This voltage, gpr, is equal to the maximum grid current times the grid resistance.
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