Optimal substation ground grid design based on genetic algorithm and pattern search by qianzhi zhang a thesis presented in partial fulfillment of the requirements for the degree master of science approved november 2014 by the graduate supervisory committee. Design parameters grounding grid design analysis consists of 5. 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. Design analysis and optimization of ground grid mesh of extra high voltage substation using an intelligent software.
Grounding system modeling, grounding grid representation, earth conductivity and connected power system. Pdf design analysis and optimization of ground grid mesh of. In this paper design of the grounding grid for square and rectangular configuration is done and analysis is done by edsa software. The earth system for different conditions, the study is performed in three cases. This software package offers powerful and intelligent functions that help electrical engineers design safe horizontal, arbitrarily shaped grounding installations quickly and efficiently. Tylavsky, chair john undrill raja ayyanar arizona state university. Background information and guidelines to design a substation grounding grid will be provided. Etap is a full spectrum analytical engineering software company specializing in the analysis, simulation, monitoring, control, optimization, and automation of electrical power systems. Design of earthing grounding system in a substation grid. Chapter 4 presents the initial design of the grounding system. High efficient multicore parallel calculation allows fast analysis of irregular largescale renewable applications. The grounding systems substation grids, tower footings.
Basic substation safety assessment quantities include ground grid resistance, mesh touch potential and step potential, moreover, optimal design of substation ground system should consider both safeness and cost. Based on experience and on the substation ground bonding requirements. Substation system software applications cyme grids eaton. In our opinion computer modeling is the only viable and ethical way to design a substation grounding grid. The presenter brings a case where the soil, site environment, and power system properties present challenges that can be solved with the use of a software package. Ground grid components ground grid modellingdesign basic shock situations step and touch tolerable body limit ground grid under fault conditions zero sequence analysis evaluating the grid performance current injection test soil resistivity testing ground grid resistance current injection testing. The testing also provided a footprint for future reference. In this article, i will share 18 design studies or calculations that will set you up to create a beautiful substation. Finite element method fem based numerical software. Easypower is the exclusive representative of xgslab software in the usa and canada. Power substation design calculations a checklist of 18.
Software development of optimal substation ground grid. Finally, we apply the maximum lg fault current on the substation, then we evaluate the step and touch voltages over the substation. I used etap software to design 44kv substation ground grid. Design and analysis of ground grid system for substation. Then the geometry of the ground grid is accurately modeled or imported from cad software. Is using cdegs for design of the substation earthing system. First, it provides a means of dissipating electric current into the earth without exceeding the operating limits of the equipment. Keywordsgenetic algorithm, optimum grounding grid design. Ses implemented the first automated grounding grid design software in the early. Two day national conference rteece2014 17th,18th january 2014 88 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 within the software. If you continue to use the site without changing your cookie settings, we assume you are fine with our cookies and the way we use them. 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. The ground grid systems module enables engineers to quickly and accurately design and analyze ground protection.
The result of the design is highly complying with ieee 802000 standard requirements. Easily and accurately design safe earthing systems. My question is regarding meth sizes, and conductor spacing. Basics of designing power substations 3 phase associates. Furthermore, the analysis of software graph is done by fdm finite difference method which is one of the mathematical solutions and it shows that how the. Safegrid earthing and grounding design software youtube. In substations the grounding should maintain a resistance of 1 to. Feb 10, 2014 the objective of the test program was to produce, for each substation site, a comprehensive test report that included recommendations for mitigation or ground grid modifications to eliminate any identified hazards. In others, when the soil resistivity increases, the resistance of the grid decreases. 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. Design and analysis of substation grounding grid with and. There are also available tutorials and guides to assist the substation design engineer with the ground grid design. Ground grid is installed to help detecting ground faults and assure safety of persons.
The substation ground grid design also takes into consideration of the freezing and raining season. Substation grounding softwareis the substation grounding grid design and analysis module specially designed 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. Safegrid earthing electrical calculations and design software. The grounding grid provides a common ground for the electrical equipment as well all the metallic structures in the substation. Desai published on 20180730 download full article with reference data and citations. Ground grid systems software ground grid design ieee. Other design inputs required for the grounding analysis software are. Design of substation grounding grid using edsa software ieee. Program is designed as per ansiieee 80 code, it calculates step potential of switchyard, touch potential of switchyard, total length of earthing mat conductor, size of earthing mat conductor and total. Safety assessment of a substation ground grid with a software package this presentation covers the case study of a substation ground grid safety performance. 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. Optimized design of substation grounding system using newly developed ieee compliant software issn. 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. 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.
Optimal design of substation grounding grid based on genetic. Pdf design analysis and optimization of ground grid mesh of extra. Ground grid systems software ground grid design ieee 80. Etap electrical engineering software offers the best and most comprehensive suite of integrated power system enterprise solution. Home download center electrical software earthing mat design for a power substation ms excel spreadsheet what does this spreadsheet do. Introduction to substation earthing grid in high and medium voltage 1 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 the ground. The ground grid module enables engineers to quickly design and analyze ground protection using advanced 3d technology that is integrated with the one line.
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. It is designed to help optimize grid design or reinforce existing grids of any shape. Thank you for your question regarding substation design using cdegs and. It uses a generalpurpose finite element algorithm for potential analysis and graphical facilities to validate ground system efficiency. 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.
Importance of an adequate substation ground grid design. We use cookies to provide you with the best possible user experience. For the shape of my particular substation, i had to use finite element method, and not the ieee 80. Jun 03, 2019 the grounding plan is required to show the underground, ground grid with grounding connections at all major equipment, steel structures, control house, and at various sections of the substation fencing in order to protect against electrical faults. The substation grounding system is an essential part of the every electrical system. Design of substation grounding grid using edsa software.
Overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem. The soil resistivity test results will also be required as design inputs. Design of network grid by etap software in this section, we complete the previous studies and aided software etap, a comprehensive optimization with regard to different parameters affecting the immune system to offer the land. 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. Software development of optimal substation ground grid design. Eatons cymgrd software is a substation grounding grid design and analysis program specially developed to help engineers optimize the design of new grids. Sep 12, 2014 overview on etap capabilities in ground grid system design and analysis using ieee 80 standard and finite element method fem.
Design and analysis of ground grid system for substation using etap software and fdm code in matlab deep b. The ground grid system of substation has to be carefully analyzed in order. Pdf design analysis and optimization of ground grid mesh. Many variables coupled with various software packages may produce slightly different results. What does it take to design a masterpiece of a substation. Substation ground system serves to safety of personnel and as major equipment during earth faults, which deserves considerable attentions. 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. Design and analysis of ground grid system for substation using etap software and fdm code in matlab written by deep b. Pdf design and analysis of substation grounding grid with and. This software package offers powerful and intelligent functions that help electrical engineers design safe horizontal, arbitrarily shaped. Substation grounding a project presented to the faculty of. Earthing mat design for a power substation ms excel. Safety assessment of a substation ground grid with a software.
Optimal substation ground grid design based on genetic. In our opinion cdegs is the best grounding software on the market, and was in. The proper grounding of a substation is essential and very important for the following two reasons. Importance of an adequate substation ground grid design 3. Flexible design methodologies allow for quick autodesigned layouts or very detailed schemes. Bentley substation is the only software that unites electrical and physical design. Optimized design of substation grounding system using newly. Electrical 20142018 sardar vallabhbhai institute of technology, vasad vadodara, india abstractthe paper depicts about design of ground grid system for 6611kv rectangular substation. An effective substation earthing system typically consists of earth rods, connecting cables from buried earthing grid to metallic parts of structures and equipment, connections to earthed system neutrals, and the earth surface insulating covering material briefly discussed in 1,3. The ieee 80 design requires that minimum spacing between conductors is 2. Software development of optimal substation ground grid design based on genetic algorithm and pattern search abstract. 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. Substation is the most vital part of electrical power system that should be operated continually and safely. Apr 14, 20 design of substation grounding grid using edsa software abstract.