International journal of engineering trends and technology. Bhuj, india abstract substation grounding is a critical part of the overall electric power system. Oct 30, 2012 in this video, i mentioned the basic steps for designing power substation grounding grid using custom codeprogram made under matlab environment. 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. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 80.
This module can evaluate the estimate places for the danger voltage points in the grid and its. Ground mat earth grid design software simmi123 electrical 6 jul 08 18. Fault level of the station can be calculated using softwares. 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. In a properly designed system, this gradient should not exceed the limits that can be tolerated by the human body. Optimal design of substation grounding grid based on.
Optimized design of earthing system for substations with high soil. The cymgrd software enables choosing the most economical way for any installation. Cymgrd is a software program specialized in the substation grounding mat design. Design and analysis of ground grid system for substation. Build custom earthing systems, using finiteelements determine a safe design overview features videos screenshots faq testimonials training overview determine earthing system performance, touch and. Based on experience and on the substation ground bonding requirements. Tying the fence ground into the main ground grid, as shown in fig. Produce greenfield and brownfield designs up to 40 percent faster with bentley substation. It uses a generalpurpose finite element algorithm for potential analysis and graphical facilities to validate ground system efficiency. The software analysis helps illustrate and support the grounding study results for your substation project. 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. This course will comprehensively cover grounding system design procedures for safety and lightning shielding. 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. Ground grid systems software ground grid design ieee.
Safegrid earthing electrotechnik pty ltdelectrical. 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. The intent of this guide is to provide guidance and information pertinent to safe grounding practices in ac substation design. This module can evaluate the estimate places for the danger voltage points in the grid and its adopting with ieee 802000 std. What does a good grounding of the power substation and. Substation grounding grid design case study using matlab vikram patel1 a. Design and analysis of ground grid system for substation using etap software and fdm code in matlab deep b.
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. 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. Design of groundmat for 11kv substation using auto grid pro. The earthing systems for a substation must have a minimum design life of 50 years. Ses implemented the first automated grounding grid design software in the early. The cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids and.
Abstract the main purpose of this paper is to acquaint the reader with various types of grounding. Design of grounding system for an electrical substation. Thank you for your question regarding substation design using cdegs and ieee std80 formulas. Electrical 20142018 sardar vallabhbhai institute of technology, vasad. The ground grid module enables engineers to quickly design and analyze ground protection using advanced 3d technology that is integrated with the one line. The purpose of a ground mat study is to provide for the safety and wellbeing of anyone that can be exposed to the. Responsibilities the group manager works enablement is the process owner responsible for approving this reference. Fast analysis of irregular largescale renewable ground grid application. Code of practice for design of highvoltage openterminal stations.
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. A ground grid mat study will determine if your substation grounding grid design is safe and will. Some substation designs require fence grounding to be isolated from the main ground grid. Etap model for earth mat design etap model for earth. Our substation design solution reduces the amount of time to complete design and minimizes errors that cause rework during construction.
Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and. All rus borrowers rus electric staff effective date. Pdf earth mat design for 233kv substation in rivers. Program is designed as per ansiieee 80 code, it calculates step potential of switchyard, touch potential of.
Here are some additional ground mats that we provide to the electrical substation industry. A good grounding system can also help prevent equipment damage during fault conditions, direct lightning strikes, etc. Optimal design of substation grounding grid based on genetic. Earthing mat design for a power substation ms excel.
Here are some additional ground mats that we provide to the. 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. Soil measurement data based on wenner fourpin method. 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. Importance of an adequate substation ground grid design. Sep 12, 2014 overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. 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. Jul 15, 2015 our substation design solution reduces the amount of time to complete design and minimizes errors that cause rework during construction.
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. Can u send me the details required to design an earth mat for 3311 kv pss. Resistance of surface material crushed rock thickness of surface material crushed rock depth of earthing grid conductor. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and industrial sites. Guidelines for the design, installation, testing and maintenance of main earthing systems in 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 is designed to help optimize grid design or reinforce existing grids of any shape.
Is using cdegs for design of the substation earthing. A substation is assembly of large no of electrical. Integrated grounding system design and testing gtpe. When a fault condition occurs, the grounding electrode grid must be sufficient to equalize potentials both in and around the substation. Design of earth grid for a 3311kv gis substation at a high. Ieee std80 is the ieee guide for safety in ac substation grounding. Earth mat minimizes the danger of high step or touch voltages in critical operating areas or places that are. This voltage, gpr, is equal to the maximum grid current times the grid resistance.
Major substation earthing design, construct and commissioning. Sonagra3 1pg student 2, 3assistant professor 1 2 3electrical department, g. 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. 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. Grounding grid design using matlab for power substations. Electricity association technical specification 41. Electrical 20142018 sardar vallabhbhai institute of technology, vasad vadodara, india abstractthe paper depicts about design of ground grid system for 6611kv rectangular substation. 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. 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.
Electricity association technical specification 4124. 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. Earth mat design can be done by manual calculations as well as with the help of computer software. Is using cdegs for design of the substation earthing system. Etap model for earth mat design etap model for earth mat design. Design of groundmat for 11kv substation using auto grid. The use of substation grounding software allows for the rapid analysis of various design alternatives to choose an economical solution for any particular installation. All substation earthing systems must be designed to ensure the following functional requirements are met.
Grounding design calculations part seventeen electrical. The manager substation design is the subject matter expert sme for the content and shall. The supporting data has been obtained from actual field tested at the substation. 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. Design of groundmat for 11kv sub station using auto grid pro jawahar m assistant professor, dept. Ground grid systems software ground grid design ieee 80. Speed project collaboration and coordination with the only software that lets you unite electrical and physical design. Design of earth grid for a 3311kv gis substation at a. Here, the design uses etap electrical transient analyzer program software. Eatons cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids. Calculation of maximum permissible touch and step voltages.
You will explore soil characterization, modeling requirements, and data preparation procedures for substation ground system design and lightning shielding. A welldesigned substation ground grid can uphold human safety for authorized personnel working in or around substations. Userfriendly data entry, efficient analysis algorithms and powerful graphical facilities render substation grounding software an efficient tool that helps the engineer arrive at. Avoid rework, reduce errors, and enhance collaboration with linked and crossreferenced 3d layouts and electrical drawings. 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. Omega red group are the uk market leaders in the specialist design, supply, installation, testing and maintenance of electrical earthing and lightning protection systems. Surge arresters or lightning arresters discharge the over voltage surges to earth and protect the equipment insulation from switching surges and lightning surges. Skm groundmat is a program for substation ground grid design and analysis. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. 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.
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. The grid spacing will be closer in the proximity of electrical equipment, and will be connected at all conductor intersections. Earth mat designing of substation free download as powerpoint presentation. Overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. Ground mat earth grid design software electric power. Substation grounding is critical part of substation design. In this video, i mentioned the basic steps for designing power substation grounding grid using custom codeprogram made under matlab environment. 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. This module can evaluate the estimate places for the danger. 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. In a properly designed system, this gradient should not exceed the limits that can be tolerated by the. It begins with a simplified coverage of the basic principles in grounding design and follows with a stepbystep design procedure.
Cyme power engineering software and solutions substation. Earthing mat design for a power substation ms excel spreadsheet. Sizing conductors a critical part of safety grounding is the. It begins with a simplified coverage of the basic principles in grounding design and follows. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code. It keeps the maximum voltage gradient along the surface inside and around the substation within safe limits during ground fault.
International journal of enginee ring trends and technology ijett volume 15 number 8. Design of earthing grounding system in a substation grid. This software package offers powerful and intelligent functions that help electrical engineers design safe horizontal, arbitrarily shaped. 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. The grounding grid system of a practical 220 kv substation is calculated by matlab program. Home download center electrical software earthing mat design for substation. Substation grounding grid design case study using matlab.
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