The cymgrd software is a substation grounding grid design and analysis. One of the most misunderstood and confused concept is difference between bonding, grounding and earthing. Safegrid earthing design and analysis software transmission line tower earthing analysis using safegrid. Preliminary design of grounding system for ac substations. The range of diameter for the earth rods vary from mm to 25mm mm, 16mm, 20mm, 25mm 3. Ground grid systems software ground grid design ieee 80. Simulation of power system analysis using computer softwares enables better understanding of the large system and provides better solution to problem. Difference between earthing and grounding difference between. How do you calculate voltage variations across an earth grid. 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 best things i like about the ses software is the ease of inputting the grid geometry and the method used for determining the split of fault current among line shield wiresneutrals and the ground grid. Ar01grounding and earthing of distributed control systems and power electronic systems grounding and earthing. Optimized design of substation grounding system using newly.
Since voltages are sitedependent, it is impossible to design one grounding system that is acceptable for all locations. To ensure an earthing system will be adequate for the protection of personnel, plant and the public it must be well designed from the beginning, to ensure all possible scenarios are considered and allowed for. It is g ood practice to perform soil resistivity tests on. A grounding system design requires several iterations before obtaining a safe configuration.
Show your company logo, leakage currents and voltages in the report. If the soil resistivity is high, we provide design solutions to bring the touch and step voltages to safe limits. This page allows access to all other input output modules. Safearth is a specialist electrical engineering group providing worldrecognised expertise in safe power system grounding and lightning protection systems. A variety of advanced solvers provide adapted approaches to. Soil measurement data based on wenner fourpin method. I worked in an electronics company for about 15 years as a computer engineer, designing software for embedded systems. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short circuit current, but it is common to use the three phase shortcircuit current for this purpose.
Design and analysis of ground grid system for substation. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and. One of the goals of a safe earthing grid is to protect people against lethal electric shocks in the event of an earth fault. It is often one of the first products of emf protection that people try out because it has become popularized by the earthing website and the associated book, earthing. Learn from experts to design safe earthing systems. Etap model for earth mat design etap model for earth. This official sponsor may provide discounts for members. Optimized design of substation grounding system using newly developed ieee compliant software is reported by vyas et al. 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. This paper presents the design of earthing system for 2 kv substations and simulation for calculation of required parameters. Library of typical station soil resistivity values. Safegrid earthing and grounding design software youtube. Pdf earth mat design for 233kv substation in rivers. Pdf safegrid earthing design and analysis software.
The book outlines a cornucopia of health benefits including reduced inflammation. Optimal design of the grounding grid by fem considering different. 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. 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. Optimized design of substation grounding system using. Cdegs worldwide leader in grounding, earthing, lightning. System grounding and earthing types analysis software etap. A complete array of auxiliary software tools are included in the cdegs suite to complement, support and enhance the methods used to solve various problems involving grounding. Earthing or grounding is a hot topic these days with healthconscious people. It is used for the safety of both equipment and humans. Bonding is more clear word compare to grounding and earthing, but there is a micro difference between grounding and earhing. We offer services in consulting, test instruments and training. Redesign the earthing grid to lower the grid resistance e.
Cdegs c urrent d istribution, e lectromagnetic interference, g rounding and s oil structure analysis is a powerful set of integrated software tools designed to accurately analyze a variety of electromagnetic related problems encountered in all industries involving electric networks. Design and analysis of ground grid system for substation using etap software and fdm code in matlab deep b. If not, however, then further work needs to be done. National grid earthing technical specification ts 3. Set the drawing units when importing autocad files. The design of earthing system for 230 kv substation is challenging task. Safegrid earthing design software complies with ieee std.
Electrotechnik earthing design software, safegrid v3. Through our grid modernization, design and build and substation automation and commissioning services, we enable our customers to achieve a safer, automated, secure and costeffective. The most powerful and accurate suite of commercially available grounding earthing and electromagnetic analysis software packages on the market. The power electronic systems generate emi or noise and can affect other electronic equipment in vicinity. Some of the things that can be done to make the earthing grid design safe. Buried earth grid design and safety evaluation of the designed earthing system to ensure potentials are within limits. 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. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short. Safegrid earthing software is powerful and very easy to use and a basic understanding of earthing principles is sufficient for using safegrid. There are many parameters that have an effect on the voltages in and around the substation area. Im interested in calculating the voltage variation of the soil, inside a mesh in a earthing grid. What earthing system should be used on an off grid install with a solar inverter, wind inverter, battery backup inverter and a 4. Connecting to the earth is easy and can be done outdoors by walking barefoot on the earth s natural surfaces or indoors with one of our earthing products. Safegrid earthing design and analysis software transmission.
Earth rod dimensions depending on the design specification of the earthing system and the corresponding earthing wells, various earth rods of different dimensions would be incorporated. What is the difference between bonding, grounding and earthing. Safegrid earthing electrotechnik pty ltdelectrical. 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. Earthing is a fastgrowing movement based upon the discovery that connecting to the earth s natural energy is essential for vibrant health. Elek safegrid is now being used to help our customers complete even more projects that are considered to be extremely complex. It is difficult to account for the large number of variables e. Earthing and grounding are actually different terms for expressing the same concept. Ses implemented the first automated grounding grid design software in the early 90s.
Spe is one of the few companies in the uk to possess the industry standard cdegs grounding software package and have the knowledge to use it we are cdegs consultants. Once this is done, then earthing should be safe but you will have to ground into the actual ground outside because your bedroom wiring ground is no longer connected. Safegrid can model earthing systems of any shape or configuration. The magnitude of ac electric current at 50hz or 60hz that a human body can withstand is typically in the range of 60 to 100ma, when ventricular fibrillation and heart stoppage can occur. The ground grid module enables engineers to quickly design and analyze ground protection using. The earthing conductors, composing the grid and connections to all equipment and structures, must possess sufficient thermal capacity to pass the highest fault current for the required time. I was looking for somewhere to get me out of the office a bit more, to. This paper is to provide information pertinent to safe earthing practices in ac substation design and to establish the safe limits of potential difference under normal and fault conditions. The ultimate potential ground potential rise or gpr is the fault current flowing from the grid into the earth times the grid resistance. Important formulas for designing a substation grid earthing system. Determine earthing system performance, touch and step voltage safety compliance. However, it is essential to have adequate protection. Safegrid earthing software technical training electrotechnik pty.
Safegrid earthing electrotechnik pty ltdelectrical calculations. Keep in mind that faults whose source is within the plant area, such as on the low side of deltagrd wye transformers do not produce any currents flowing from the grid into the earth because there is a. However an indepth knowledge of earthing principles as well as understanding the safegrid modules, which our technical training course will. In this paper, a real time case study has been considered and the design was done using etap electrical transient analyzer program software.
Ses has developed the most powerful grounding earthing. A safety is one major concern in the operation and design of an electrical power. Fast analysis of irregular largescale renewable ground grid application. Conductors a substation earthing grid will consist of a earthing system of bonded cross conductors. Feb 02, 2014 safegrid earthing design software complies with ieee std. A correctly functioning earthing system is essential for safe operation of the system and protecting personnel and livestock against electric shock.
Pdf optimized design of substation grounding system. Safearth careers join the experts of safe power earthing. Safearth world recognized experts in safe power grounding. The componentbased nature of the autogrid pro software packages enables. On the other side, the distributed control systems are more vulnerable to emi or noise effects and can easily maloperate due to its presence.
Design of earthing system for 230 kv high voltage substation. The grid current, fault duration, soil resistivity, surface material, and the size and shape of the grid all have a substantial effect on the voltages in and around the substation area. The resulting earthing types are displayed both on the one line diagram and for the various connected cables. Main details related to substation grounding system design such as shape of ground grid, voltage rating of the substation etc. Earthing grid, is an arrangement in a plant which is very important for a few reasons, all of which are related to either the protection of people and equipment andor the optimal operation of the electrical system. Electrical 20142018 sardar vallabhbhai institute of technology, vasad vadodara, india abstractthe paper depicts about design of ground grid system for 6611kv rectangular substation. It is used to keep the exposed conductive surfaces of devices at earth potential, and in th. Jan 19, 2017 an earthing system is the circuitry which connects parts of the electric circuit with the ground. The 40foot cord is generally long enough to reach to a second floor window. Careers solve unique problems be part of a community. Figure 2 shows main page of the software esgsd that allows access to all other input and output modules. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines. An earthing system is the circuitry which connects parts of the electric circuit with the ground.
The packages are accurate, efficient, reliable and most of all, validated extensively with verifiable resullts published in the most reputable scientific journals. Design safe buried earthing and grounding systems for applications. Ses has developed the most powerful grounding earthing software. Cyme power engineering software the cyme power engineering software is a suite of applications composed of a network editor, analysis modules and usercustomizable model libraries from which you can choose to get the most powerful solution. Eaton combines decades of expertise with stateoftheart solutions to help industrial customers and utilities improve reliability, drive efficiencies, reduce costs, and protect people and assets. Design of earth grid for a 3311kv gis substation at a. Earthing grounding in the power grid or in the power system includes complexity measures and means that are undertaken in order to provide conditions for normal operation of the system, safe operation and movement of people and animals in the vicinity of the facilities which can come under voltage in normal or hazardous conditions. Ground grid systems software ground grid design ieee. Power system earthing power system consultants spe. Finite element method fem based numerical software. Elek safegrid is used for designing safe buried earthing systems with ease and accuracy.
Earthing grounding of power electronic and distributed. Easily and accurately design safe earthing systems. In this paper, the focus is on according to ieee 802000, the area of the grid is the single most important geometric factor in determining the grid resistance and they are inversely related. Ses has developed the most powerful grounding earthing software packages that can automatically design an entire grounding site located in multilayered soil. When two electrical installations are in close proximity the earthing systems can be designed as either standalone earth grids or as a combined earth grid system. The way to fix this is to install a triple pole contactor with a remote control that physically disconnects your bedroom wiring from the grid at night.
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