Keywordsgenetic algorithm, optimum grounding grid design. Abstract the main purpose of this paper is to acquaint the reader with. His paper is concerned with earthing practices and design for outdoor ac substation include distribution, transmission substations for power frequency in the. An adequate grounding grid has been designed using concepts outlined in ieee. Practical steps in the design of a substation grounding eep.
Selection of the location of a substation must consider many factors. Design of grounding system for an electrical substation. Home technical articles practical steps in the design of a substation grounding substation grounding grounding at power substations is extremely important. The earthing systems for a substation must have a minimum design life of 50 years. Bus arrangements reliability cost of configuration available space. Electrical earthing or grounding electrode design for.
Major substation earthing design, construct and commissioning. This fundamental course leads you through a stepbystep study of the substation design and construction process. Earthing system design ensures safety compliance for both the substation and transmission lines under fault conditions. The substation grounding grid is a system of horizontal, interconnected bare ground conductors, spaced a few meters apart, buried in the earth at a depth varying from 0. This paper presents 230 66 kv, substation grounding system and calculation results of required parameters. Ieee guide for safety in ac substation grounding ieee std 802000. Effective grounding system design is important as it deals with personnel safety and protection of electrical equipment. Electrical earthing or grounding electrode design for building construction 0 the design calculation of the earth electrode systems shall be based on the approved earth resistivity data. Covers the design of bus support structures and connectors. What does it take to design a masterpiece of a substation. It is to be noted that two of the most critical parameters that influence the design of the grounding. Substation lightning protection and earthing standard. All substation earthing systems must be designed to ensure the following functional requirements are met.
Substation grounding grid design therefore requires calculating of parameters related to earth and grounding with a great concern for the safety of the persons who may come under the influence of the potential gradient due to severe earth fault. Wellman, optimal ground grid design for large ehv substations with autotransformer, publication no. Under substation fault, both the substation earth grid and the pole grid resistance are exposed to voltage rise. Substation earthing design akshay patil electrical and electronics engineering, navrachana university, india abstract. Design and analysis of substation grounding grid with and. Distribution substations michigan technological university. 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. Introduction in designing and construction of an electric substation, one of the most important issues that must be considered is designing of. 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.
Successful operation of entire power system depends to a considerable extent on. Substation grounding design challenges and lessons learned. Substation design instruction sdi 505 minimum design and construction requirements for transmission and zone substations and switching stations substation design instruction sdi. Pdf considerations about substation grounding system design. Optimal design of substation grounding grid based on. Experience experience to provide the optimum design one that doesnt use more material than is necessary, saving you money. We have already given an introduction to substation earthing system in an article published earlier. It describes the detailed computer model of the east central substation grounding grid and shows how to use the malt. Important formulas for designing a substation grid earthing system. Index terms conductor material saving, ground rods, optimization of substation grounding grid, sveraks method. The grounding grid provides a common ground for the electrical equipment as well all the metallic structures in the substation. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978.
The ergon energy design philosophy is to provide substations. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Pdf simplified method for substation grounding system design. Earthing mat design for substation spreadsheet photo by input fields as per ansiieee std 801986 code. K substation standards switch operating and equipment platforms electrical design and details 20. The grounding system is essential to protect people working or walking in the.
Flow of the earth system, cause voltage gradients ground level which case different parts of the earth and the reference ground round. An optimization approach conference paper pdf available september 2006 with 2,901 reads how we measure reads. Design of a proper substation grounding system is very involved as many. The input for a distribution substation is typically at least. The national electric code nec states that the resistancetoground shall not exceed 25 ohms for a single electrode. As a substation design engineer, gc has experience in all aspects of substation design, with an emphasis on grounding analysis and design for substations, transmission and distribution structures, and induced voltage mitigation.
Calculationofimportantdesignparametersforgroundingsystemsinsu. Design the main considerations taking into account during the design process are. Pdf grounding system design in electrical substation. Electrical earthing or grounding electrode design for building construction 0 the design calculation of the earth electrode systems shall be based on the approved earth resistivity data and the systems fault currents and their duration. Today we are going to discuss the design of substation earthing system. Provide a professional design concept for any grounding system of ac substation as per standard ieee. Power substation design calculations a checklist of 18. Whitepaper substation grounding identifying and implementing. Substation grounding substation substation design course substation design 220kv substation power substation grounding. Earthing mat design for a power substation ms excel. Management boem requested proposals to provide recommendations for offshore substation design development of standards. The substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process. It describes the detailed computer model of the east central substation grounding grid and shows how to use the malt computation module to determine the grounding grid impedance that will be used in the computation of the fault current distribution in chapter 5 step 2. Calculationofimportantdesignparametersforgroundingsystemsi.
Computer aided design is the b est way to design and optimize a grounding system, b ut the majority of the substation grounding grid are still calibrated analytical, based on 1 or 2. Optimal design of substation grounding grid based on genetic. Typically, the site engineer or equipment manufacturers specify a resistanceto. Performing grounding design calculations by 6 different methods for domestic, commercial and industrial facilities, know the grounding design procedure for ac substations, performing. Substation earthing system design underground horizontal earth mesh matgrid the mesh is formed by placing mild steel bars placed in x and y directions in mesh formation in the soil at a depth of about 0. Substation grounding grid design therefore requires calculating of parameters related to earth and grounding with a great concern for the safety of the persons who may come under the. Performing grounding design calculations by 6 different methods for domestic, commercial and industrial facilities, 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. The result of the design is highly complying with ieee 802000 standard requirements.
Optimized design of earthing system for substations with. Offshore substation design development of standards. 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. Chapter 4 presents the initial design of the grounding system.
All rus borrowers rus electric staff effective date. Optimized design of substation grounding system using. Grounding system design relies on various factors that vary from substation to substation. This voltage rise could reach unacceptable and dangerous levels. Design of substation grounding grid using edsa software. Power systems earthing grounding substation earthing mesh. The purpose of this project is to provide recommendations to bsee and boem as to what additional standards may be applicable to offshore substation design as the agencies update their regulations.
In this article, i will share 18 design studies or calculations that will set you up to create a beautiful substation. A substation standards switch operating platforms steel design and details 49. International journal of trend in scientific research and development ijtsrd volume 3 issue 5, august 2019 available online. Design of earthing system for new substation project citeseerx. Substation and transmission lines earthing system design. Cost sufficient reliability without excessive cost 3. Typically, the site engineer or equipment manufacturers specify a resistancetoground number. As a substation design engineer, gc has experience in all aspects of substation design, with an emphasis on grounding analysis and design for substations. It is to be noted that two of the most critical parameters that influence the design of the grounding system at an electrical substation are the soil resistivity and the area available for laying the grounding system. Substation lightning protection and earthing standard r1063711 transmission line design standard r1047217 transmission line construction standard 1. Ieee guide for safety in ac substation grounding ieee std. Grounding design calculations part sixteen, i explained the following steps. Provide conceptual grounding system a for the substation, including design specification of. He specializes in system protection, relay settings, and system studies grounding, ac.
Substation engineers must accurately assess the condition of grounding systems to ensure they are capable of dissipating additional fault current. 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. The grounding system is essential to protect people working or walking in the vicinity of earthed facilities and equipments against the danger. The first guide for the substation grounding design was introduced on 1961. This substation grounding course covers effective relaying and insulation of equipment. D substation standards lighting fixture pole and bracket mounting 19. Design of earthing grounding system in a substation grid. Power systems analysis and design br gupta power systems earthing. Grounding system provides the ground connection for the grounded neutral for transformers, reactors, and capacitors and also the discharge path for the most important steps in the practical design of a substation grid.
More details about the detailed procedure for grounding system design as per ieee standard guide lines can be found from 2. Introduction he optimization of the design of substation grounding. A grounding design starts with a site analysis, collection of geological data, and soil resistivity of the area. Knowledge our knowledge of the latest products ensures a tailored design that can be installed using the most appropriate and uptodate products. Pdf the grounding grid provides a common ground for the electrical equipment as well all the metallic structures in the substation. Fence grounding n the national electrical safety code requires grounding metal fences used to enclose substations with energized electrical conductors or equipment. This paper presents the design of earthing system for 400 kv substation and calculation of its parameters. Review of substation grounding practices, safety and. Optimized design of earthing system for substations with high. Apr 14, 20 design of substation grounding grid using edsa software abstract. Pdf design and analysis of substation grounding grid with and. The cross section of the buried cable should calculated in accordance with the value of the phasetoearth short.
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