Two day national conference rteece2014 17th,18th january 2014 88 optimized design of substation grounding system. Effective and suitable earthing design is cruicial to ensure effective performance and to mitigate any negative impact on the security of electricity supplies and power quality. You will learn the different system configuration methods and the theory behind common methods. Pdf design analysis and optimization of ground grid mesh of. Project electrical engineer highvoltage substation design. In every electrical installation, one of the most important aspects is adequate grounding. Earth resistance substation design for both greenfield and brownfield substation projects to meet the performance expected by ergon energy. Substation engineering ampirical has recognized national expertise in the planning and design of new substations as well as additions, updates, modifications, expansions or retrofits of high voltage. Design of grounding system for high voltage substations. The station engineer will be responsible for designing high voltage.
Jul 26, 2017 the substation grounding system comprises of a grid earth mat formed by a horizontal buried conductors. This course covers all aspects of high and medium voltage substation design, including regulatory and environmental requirements, general design considerations, and the application of switching and. Power substation design calculations a checklist of 18. After modeling the area, we will engineer an electrical grounding system design that will meet your performance objectives.
Provide a conceptual grounding system design for the substation, including specification of conductor size. Index terms etap software, grounding grid, substation. A grid layout with particular conductors is then analyzed to determine the effective substation earthing resistance, from which the earthing voltage is calculated. Provide conceptual grounding system a for the substation, including design specification of conductor size and depth, crushed rock or asphalt resistivity and thickness, in accordance with the above design criteria. This voltage gradient should not exceed the tolerable human body limit. High losses and costs of performing conventional designs have made researchers think of. Jun, 2016 designing medium voltage electrical systems engineers should know how nominal system voltages were established, what constitutes a medium voltage electrical system, and what range of systems are considered appropriate for medium voltage. Minimization of construction costs of substation grounding grids. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission. Flow of the earth system, cause voltage gradients ground. Video 1 earthing of ac substation basic part 1 youtube.
Design and analysis of ground grid system for substation using etap software and fdm code in matlab written by deep b. The substation design manual is not intended to replace asset management standards, but rather. Wherever you are, siemens is your reliable partner for the onestop planning and construction of customized, stateoftheart highvoltage. The function of an earthing and bonding system is to provide an earthing system connection to which transformer neutrals or earthing impedances may be connected in order to pass the maximum fault current. Grounding of high voltage power substation is a very important subject in electric power technology since it is decisive when it comes to touch and step voltages that will arise within a substation area during an earth fault. What does it take to design a masterpiece of a substation. Effective grounding system design is important as it deals with personnel safety and protection of electrical equipment. Earth fault gives rise to potential gradient within and around the substation. System grounding and earthing types analysis software etap. Our substation design solution reduces the amount of time to complete design and minimizes errors that cause rework during. We use cookies to provide you with the best possible user experience. Major substation earthing design, construct and commissioning. Optimal design of grounding systems for high voltage. Before 1960s the design criterion of substation earthing system was low earth resistance.
Go to content substation earthing calculation methodology. Pdf design analysis and optimization of ground grid mesh. They cover large area meeting the power requirement of whole power system. Substation grounding audits and design services ea americas. The grounding system of substation is studied in detail along with practical. Your expert instructors will walk you through the stepbystep process of substation grounding optimization studies and corresponding design and construction drawings. Highvoltage substations highvoltage power transmission. Introduction n every electrical installation, one of the most important aspects is the adequate grounding. Part 2 will cover the tolerable step and touch voltage. Substations layout design including outdoor equipment.
Safegrid earthing electrotechnik pty ltdelectrical calculations. We first use soil resistivity measurements to calculate a 2layers. High voltage substation question for electrical engineer interview. Design and analysis of substation grounding grid with and. Nov 08, 2014 design analysis and optimization of ground grid mesh of extra high voltage substation using an intelligent software abstract. Optimal design of substation grounding grid based on genetic. Jul 15, 2015 improve project delivery and better manage design information across the entire project lifecycle with intelligent substation design, a modelcentric approach that unites 3d physical and electrical design disciplines. Therefore, using an alternative software should be more beneficial and costeffective. Matlab, an engineering software, has been utilized in this study to design the substation grounding system of non. Grounding of high voltage power substation is a very important subject in electric power technology since it is decisive when it comes to touch and step voltages that will arise within a substation area during an earth fault guidelines for grounding of outdoor high voltage power substation photo credit. High voltage substation designer mississauga office. Avoid rework, reduce errors, and enhance collaboration with linked and crossreferenced 3d layouts and electrical drawings. Dec 31, 2015 substation interview questions and answers.
Design of earthing grounding system in a substation grid. Substation design houston, texas usa there are several critical decisions that must be made during the design of any high voltage electrical substation. Design analysis and optimization of ground grid mesh of extra high. In our opinion computer modeling is the only viable and ethical way to design a substation grounding grid. Optimal design of substation grounding grid based on. 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 this article, i will share 18 design studies or calculations that will set you up to create a beautiful substation. Common multiple earth neutral system cmen is a system where the combined high voltage and low voltage distribution earthing system is connected to a zone or transmission substation earthing system. The size and type of the substation can be vary, but those design aspects are similar. Optimized design of substation grounding system using newly. Grounding system design of substation using matlab program. Determine earthing system performance, touch and step voltage safety compliance.
Work involves all aspects of physical design for high. The first step in designing a power substation is to design an earthing and bonding system go to content earthing and bonding. Optimized design of substation grounding system using newly developed ieee compliant software issn. Pdf designing grounding systems for high voltage substations has been. The main objective of a substation grounding study is to design safe grounding facilities for substations and buildings.
Highvoltage substations, the node points of todays complex power transmission infrastructure, play a key role in meeting this demand safely and reliably. Substation interview questions answers engineering tutorial. Design and analysis of substation grounding grid with and without considering seasonal factors using edsa software mithun mondal, dr r. Nov 30, 2014 3d substation design and modelling, south africa.
Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial. Engineers should know how nominal system voltages were established, what constitutes a mediumvoltage electrical system, and what range of systems are considered appropriate for. Keywordsgenetic algorithm, optimum grounding grid design, power system analysis, power system protection, single layer model, substation. After high voltage substations are constructed, solving the problems related to grounding system can be expensive and difficult.
Complete electrical substations for electrical engineering. Cdegs is a computerbased electrical engineering modeling software program that uses ieee 80. Improve project delivery and better manage design information across the entire project lifecycle with intelligent substation design, a modelcentric approach that unites 3d physical and. Substations layout design including outdoor equipment arrangement, cable tray layouts, trenching and cable routing. Optimized design of substation grounding system using. Design analysis and optimization of ground grid mesh of extra high voltage substation using an intelligent software. Design of earthing system for 230 kv high voltage substation by.
This position offers you the opportunity to work in a project team environment with other engineers and designers involved in the detailed electrical design and project management of high voltage substation. Introduction to power system and substation grounding. High and medium voltage substation design, testing and. Before 1960s the design criterion of substation earthing system was low earth. Importance and need of accurate modelling of soil of high. Introduction in designing and construction of an electric substation, one of the most important issues that must be considered is designing of protective system to the earth. Scope this document states the functional requirements with regard to substation earthing and bonding, and integration into a substation, as well as items that.
Substation design 69kv to 550kv high voltage substation. Our 12hour live online substation training course will cover the major elements that build electrical substations and switchyards. Grounding of high voltage power substation is a very important subject in electric power technology since it is decisive when it comes to touch and step voltages that. Is using cdegs for design of the substation earthing. Aecom hiring substation designer in princeton, new jersey. Etap model for earth mat design etap model for earth. However, the and limited user licenses affect the practical use. Substation earthing and bonding and their integration into a substation and the potential impacts on third party owned assets in the immediate vicinity of the substation. The manual is applicable for all substation projects regardless of internalexternal design delivery mode. An introduction to grounding calculations and why they are. Bentley substation is the only software that unites electrical and physical design. This paper will present ground potential rise gpr causes, effects, variations in the values gpr in high voltage.
Ensuring a safe environment is in place during a high voltage earth fault. As the experts in electrical grounding solutions, we use specialized design software to model and build an electrical grounding system design based on the soil data, design goals, and other factors. Designing grounding systems for high voltage substations has been always considered a serious concern. A minimum of five years experience in physical substation design, or related experience, is required. Substation grounding grid design therefore requires calculating of. Design safe buried earthing and grounding systems for applications including substations, power plants, transmission lines, transformers, mining, commercial and industrial sites. 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. Maskwa high voltage has a broad range of experience in substation engineering and offers a complete package of design services including. Design and analysis of ground grid system for substation.
Complete electrical substations for electrical engineering 4. Design analysis and optimization of ground grid mesh of extra. High and medium voltage substation design, testing and maintenance training in london uk, dubai united arab emirates, kuala lumpur malaysia, istanbul turkey, france paris. 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 design high voltage services high voltage. India abstract with the incessant increase of power system capacity and voltage grade, the safety of grounding grid becomes more and more prominent. 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. Optimal design of grounding system for hv ehv substations in. Calculations for earth impedances and touch and step potentials are based on site measurements of ground resistivity and system fault levels. K jarial, satyaprakash ram, gurmeet singh department of. These substation grounding design can be designed to regulate the system, to switch or changing the voltage of electricity in and out of a system. Safegrid earthing electrical calculations and design software. Ground potential rise gpr is a concern in the design of substation grounding grid. Introduction n every electrical installation, one of the. We will introduce you to the fundamentals of utility power system grounding. Webinar substation the basics of a substation configuration and its. Substation grounding training the electricity forum.
This 2day substation grounding training course will discuss how to maintain, test, and inspect a proper grounding system for the electrical power substation. Produce greenfield and brownfield designs up to 40 percent faster with bentley substation. Grounding design service utilizing cdegs software package. Eatons cymgrd software is a substation grounding grid design and. Speed project collaboration and coordination with the only software that lets you unite electrical and physical design. Calculationofimportantdesignparametersforgroundingsystemsi. 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.
Substation grounding system of provincial electricity authority pea are normally designed using cdegs software. Failure to implement a suitable earthing design can lead to incured costs from addressing earthing problems and could also cause a threat to potential safety. Uniform or twolayer soil model from field measurements or. Apr 09, 20 high voltage electronic system area is to bereferred as substation. The method proposed for substation grounding is in accordance with ieee std 802000. The substation grounding system comprises of a grid earth mat formed by a horizontal buried conductors. Using software programs to model grounding systems and perform analysis. Hence, grounding grid design must be carried out consistently 4. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978.
A earthing system for 230 kv high voltage safety is one major concern in the operation and design of an electrical power substation by etap 12. Motors which operate high voltage switch and ones that charge the spring inside the circuit breaker. Desai published on 20180730 download full article with. 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. Provide conceptual grounding system a for the substation, including design specification of conductor size. This 12hour live online substation training course give. 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. High losses and costs of performing conventional designs have made researchers think of new.
The grounding system of substation is studied in detail along with. Successful candidates with more than five years of experience may be placed in more senior level designer titles depending on skill. The 500kv substations are important for power system in pakistan. Jul, 2017 earthing of ac substation basic part 1, consist of basics about earthing design in ac outdoor substation. Guidelines for grounding of outdoor high voltage power.
834 567 1269 27 615 203 995 843 152 305 1522 315 1484 700 728 858 416 66 649 463 732 148 1333 1330 858 261 983 491 265 1424 486 1084 1252 645