Substation Ground Grid Testing

Grounding of steel structures inside the substation is important to prevent shock. Substation Construction. Substation with Substation Ground Bed and Three Parallel Ground Paths. The tunnels, which will be up to four metres in diameter, will largely be buried deep beneath the streets. With the Wenner four-pole equal-method, the soil resistivity is measured at both selected sites, one of which contains wet soil while the other contains dry soil. Interconnection evaluations and studies usually result in a proposed plan of service for physical and communications interconnections. For substations located in urban areas, this influence is unavoidable and so intensive that it cannot be disregarded. The ground bond test (also called PE resistance test, ground continuity test), is the first test required by the electrical safety testing standards. The functions of grounding systems or earth mat in include: Ensure safety to personnel in substations against electrical shocks. Provides custodial care and operational inspection of Company substations. 400 kV Bays including associated civil works for PGCIL at 400 kV Ajmer (RRVPNL) Substation for termination of 400 kV D/C (Quad) Line from 765 kV Ajmer (New) Substation under Green Energy Corridor ISTS Part-A Voltage Level: 400 kV Location: Ajmeer. Grounding of a substation can be achieved be using grids. This is a major route by which primary current returns to the substation. electrical grid. Standard earth resistance testing methods require that the ground rods be disconnected during the test to prevent false readings. Aep’s Effective Ground Grid Resistance Measurement Procedure 285674 PPT. This voltage, GPR, is equal to the maximum grid current times the grid resistance. Safety remains a primary concern for substation owners, specifically in terms of protecting human life, and ensuring reliable network operation. The scope of the work included the turbines, collection, and switching stations. AU - Kucuksari, Sadik. With the Wenner four-pole equal-method, the soil resistivity is measured at both selected sites, one of which contains wet soil while the other contains dry soil. V operating devices. This paper presents an approach to test the integrity of the grounding grid in a general framework of IEEE Std. The project objective was to optimize the grounding system design, and minimize the use of counterpoise therein. MORE T&D TOPICS: Communication Technology Cybersecurity Distribution Automation / Substation Automation Outage Management Transmission T&D NEWS. EHV Substation Design. For commercial and industrial systems, the types of power sources generally fall into four broad categories: A Utility Service – The system grounding is usually determined by the secondary winding configuration of the upstream utility substation transformer. The proper installation of bonding and grounding devices is important in the protection of personnel and equipment. Importance of Earth Grid Impedance Testing Safety policies require that the values of earth impedances remain within the specified acceptable range and every utility is required to guarantee safe step-and-touch potential levels. GS Engineering Ltd. Copperweld grounding solutions have been used in the power grid since 1915, because the unused middle of a copper conductor is a great place to add strength, improve survivability and increase service life — a process known as 'Hardening the Grid'. Scope This document states the functional requirements with regard to Substation Earthing and Bonding, and integration into a substation, as well as items that. Since its inception in 1992, We are committed to meet the needs of our customers through quality product solutions and proven customer service. " (Earth Resistance< 0. IEEE Std 80-2000 IEEE Guide for Safety in AC Substation Grounding. Design of Grounding System for an Electrical Substation: An Overview Maneesh kumar, Gagandeep singh. It should be embedded vertically. The grounding system in substation is very important. Our Construction Division is staffed by skilled Power System Electricians, Industrial Electricians, and Engineering Technologists, each with years of experience. Removable ladders and mobile platforms shall be easily. The scope of the work included the turbines, collection, and switching stations. Personnel within a substation during a fault are subject to step, touch, mesh and transferred potential, which may be at dangerous levels if the ground grid or its connections are in poor condition. Each piece of equipment is then connected to the control room, which is under construction. Exothermic weld or non-reversible connections at room ground bus bar completed. characteristics of a grounding grid was far more different than its performance at power frequency GPR wavefobecause of the inductance of the system and the soil ionization phenomena. Tying the fence ground into the main ground grid, as shown in Fig. It will also cover important safety topics to be considered. This standard provides direction and methods for qualifying permanent connections used for substation grounding. Per Gate SSSG055 SubGr ade Grounding Install Substation Personnel Gate Grounding TM2. PRODUCED BY THE OPERATIONS DIRECTORATE OF ENERGY NETWORKS ASSOCIATION www. Electric Power eTool: Illustrated Glossary - Substations. The following discussion outlines the specific requirements and test intervals for testing Westerns ground mats: • Field Offices should establish benchmark data for all substation ground mats. However, the design of such substations is very complex. EATS 41-24 - Guidelines for the Design, Installation, Testing & Maintenance of Main Earthing Systems in Substations. To expand my experience as part of a team or in a senior position as needed, through a dynamic work designing & testing Substations, following the Installation on site, on both onshore and offshore locations. Some methods (e. of the substation must be properly characterized in order to accurately model and design the ground grid. It provides proper grounding of all apparatuses in substations. 16 kV to 161 kV. Inadequate grounding may cause failures in major substation's equipment, as well as in control, metering and telecommunication equipment. GS Engineering Ltd. ground grid is safe for the sequentially cleared fault. The purpose of this grid is to improve the safety of both personnel and apparatuses in the substation. Grounding assessments and consulting. However practical implementations on the ground in pilots as well as live stations sometimes employ a bottom-up. This course is focused on grounding applications for electric utility and complex commercial and industrial systems. REQUEST A QUOTE. ElectraNet has 91 substations located around South Australia, helping move high-voltage power over long distances, to where it is needed. The design package for ground grids and systems for substations with equipment operating at above 15 kV shall be submitted to the Coordinator, Electrical Systems Division, Consulting Services Department for review. (PSE) can assist you in meeting the challenges of increasing loads and the increased requirements for metering, control, and monitoring. A Substation Apprentice will gain a working knowledge of substation equipment, electrical wiring and testing through the program. It is ideal for substation personnel with less than 2 years' experience or meter technicians who work occasionally in substations. Electrical Testing. Grounding issues across the world have typically been dealt with by technical groups, each with their own specific terms of reference. The ground bond test (also called PE resistance test, ground continuity test), is the first test required by the electrical safety testing standards. " (Earth Resistance< 0. Per Gate SSSG055 SubGr ade Grounding Install Substation Personnel Gate Grounding TM2. Balfour Beatty has today (Friday 21 June) been awarded a £50m contract to replace a high-voltage substation at Littlebrook Power Station in Kent on behalf of National Grid. The wind farm was designed to provide renewable power to the fast paced residential and commercial expansions in the area as well as to bolster the renewable generation capacity to the grid at large. It has been extensively tested on fan-less substation computers for both 32 and 64 bit processors using either Windows or Linux operating systems. GROUND BOND TEST. Good grounding path of. Testing There are many firms who perform soil resistivity testing, and like. Wholesale Trader of Electrical & Substation Testing Instrument - Power Multimeter, Timer, Primary Injection Test Kit and Oil BDV test Kit offered by Zenion Technology India, Bhubaneswar, Odisha. Amendment No: 6 Substation Maintenance Instruction Major substation earthing system test IMPORTANT DISCLAIMER As the information contained in this publication is subject to change from time to time, Endeavour Energy gives no warranty that the information is correct or complete or is a definitive statement of procedures. Experienced in control application development and embedded software development/testing for HVDC stations, DC machines and DC-DC converters. We’re the single source of electric power substation services for many municipalities & universities, providing complete substation maintenance & repair. Social media updates Subscribe to our Twitter or Facebook feeds to receive the latest updates. , Slope Method) tend to require less distance than others (e. Construction and commissioning Supervision of HV Substation and Under Ground Cable Projects ( National Grid - Saudi Arabia). 1 Pipe Electrode. (e) Portable Clamp-On Method for Ground Testing Clamp-on ground resistance testing offers the ability to measure the ground resistance without disconnecting the ground rods or the wiring of the system. The purpose of this paper is provide knowledge about the GPR, substation grounding grid and step and touch potentials. Before 1960s the design criterion of substation earthing system was “low earth resistance. The successful and reliable detection of copper theft and tampering at key substation locations either through test simulations or actual events. Although electric utilities have for many years used handheld thermal imaging cameras to monitor substation equipment, quite some are now turning to permanently installed thermal imaging camera systems. The Substation Design Suite™ not only provides this understanding but leverages Inventor’s 3D modeling kernel to enable automated bus routing, trench and conduit routing, ground grid and ground lead routing and most importantly, substation specific design checking such as phase to phase and lightning protection. substation design is quite far away from providing a safe ground grid design. 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. 2007, Technical Report Because safety impacts all segments of the electric power industry, the integrity and conformance to standards of substation grounding systems is of paramount importance. Twenty years ago I was standing in a 15-kv substation when a distribution buss CT failed in a fault and exploded. Substation Earth System Injection Testing Analysis Tool SP0510R01. ABB is a pioneering technology leader that works closely with utility, industry, transportation and infrastructure customers to write the future of industrial digitalization and realize value. Credit earned on completion of this program will be reported to RCEPP. Powertech Labs conducts ground grid assessments and studies, and facilitates different grounding related testing. We perform substation construction from the ground up to testing and commissioning. The GIS substation has most of its electrical structure contained in sealed tubular enclosures. Session 5 – Substation Layout • Design inputs • Substation layout selection • Air insulated substations. Document wire sizes of grid and tails. Testing, Pre-Commissioning and Commissioning of Eight 33KV Outgoing Feeders at Meghnaghat 132/33KV grid substation for PBS, Dhaka,Bangladesh in 2014. The length of the pipe electrode should not less than 2. Therefore, the meter reading on a test instrument will not represent the ground bed resistance accurately. Go back to contents ↑ 6. 415KV substation for construction supply. The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion. About Ground Grid Testers. And the whole ground grid thing is crazy once you get away from overhead tubular construction. Increase your awareness of substation and power system grounding principles and practices. It protects other substation equipment from lightning and switching surges by suppressing them to ground. Scope This document states the functional requirements with regard to Substation Earthing and Bonding, and integration into a substation, as well as items that. As a promoter of sustainable mobility, Alstom develops and markets systems, equipment and services for the transport sector. Testing & Commissioning for more than 10 substations project in Jeddah, Yanbu, Jubail, Riyadh, and Qurayyat 1. Exothermic weld or non-reversible connections at room ground bus bar completed. P14DZ Directional Feeder Management Relay with High Impedance Fault Detection/Transient Ground Fault Detection MMLB Test Plug. Co-developed by a major US utility to inject and be key part of measuring current flow paths thru the grid. Sub stations on Site have a ground grid located under the rocks, but if an individual is located outside this area and while standing on the earth, touches a ground or a grounded object, a difference in potential may exist during a ground fault. A geotech survey of the substation needs to be performed to obtain the soil resistivity data to enable this study. False Because the possibility exists that a fault in the power system will cause a high current to flow into the ground system while ground resistance tests are in progress, it is recommended the operator __?__. The Grounding & Lightning program takes a broad spectrum view, providing clarity and understanding to grounding and lightning related topics. For PG&E‐built substations, the grounding source is the ground grid, and the ground source inside the meter enclosure is Cadweld‐connected to the substation ground grid. We build certified custom grounding cables / grounding clusters and bypass jumper cables for utilities & contractors, tested to ASTM and OSHA standards. A piece of debris penetrated a nearby OCB and started an oil leak. Quote (Gunnar). The Study on the Construction of the Smart Grid Test Plant and the Integration of the Heterogeneous Systems. Cooper Power Systems engineers and manufactures medium- and high-voltage electrical equipment, components, and systems that deliver reliable electric power to homes, industries, businesses, and institutions worldwide. substations, disturbing the existing ground grid during the upgrading and need to extend the ground loop. It allows to perform accurate tests on CTs, VTs, PTs and ground grid. Standard earth resistance testing methods require that the ground rods be disconnected during the test to prevent false readings. Knowledge of earth grid impedance of high voltage substations is also very important for correct operation of protection schemes and fault clearance. Ground grid has been tested and results accepted. This voltage, GPR, is equal to the maximum grid current times the grid resistance. Complies with: IEEE Std. Improve Plant Safety through Ground System Testing, Analysis, and Maintenance Positive Results of an Effective Ground-Fault Current Path An effective ground-fault current path, developed as a low-resistance route to clear a ground fault, must: Provide a path for fault current lower in resistance than people, to save lives. In 2011, INMR visited two major grid projects – one being a new double circuit 400 kV line and the second a new 400 kV GIS substation in the Czech Republic. 1 Earth Mat or Grid Primary requirement of Earthing is to have a low earth resistance. Analysis of surface potential and current densities in multilayer soil is available in the literature [8,9,10]. If it is in a substation we can install it & provide you with commissioning test reports and functional test plans that allow you to know your equipment is safe, reliable & installed as engineering intended. In some cases, existing ground grids can be modeled using appropriate software. The numerous Siemens high-voltage substations that are in operation worldwide comprise grid access solutions for wind farms as well as exceptionally compact solutions that bring high voltage right into the centers of consumption and ultra-high voltage substations for the backbones of transmission grids. The purpose of this paper is provide knowledge about the GPR, substation grounding grid and step and touch potentials. Evaluates test results and recommends appropriate action. 2 Specific Requirements. Performing Substation Ground Grid Test Using GGT500 Beneath every substation there is a ground grid which provides proper grounding of all apparatuses in substations. Hargrave Power provides turnkey installation and design capabilities for substation projects. It is therefore necessary to carry out periodic testing on substation. Evaluation of Grounding Performance of Energized Substation by Ground Current Measurement J. In order to simulate a single-phase fault, a test current is injected into one of your power lines by using a frequency variable current source and grounding the remote end of the line. In this paper, soil resistivity and ground resistance at two different sites near an electrical substation are measured using a grounding system grid with and without rods. The team is comprised of a core group of managers and staff from the Field Service and Electrical Power Industries. IEEE Std 80-2000 IEEE Guide for Safety in AC Substation Grounding. 1 Ground Potential Rise (GPR) The substation earth grid is used as an electrical connection to earth at zero potential reference. In addition, ground designs for poles and towers must limit transient ground potential rise. Ground grid has been tested and results accepted. Applying a spe-cific percentage rule such as the 61. With Modula, it’s easier than ever to build stunning lightbox galleries, masonry grids, custom grids and more in no more than a few clicks right from the WordPress dashboard. Whether your bringing your site down for maintenance, new construction or a major repair we can provide you with an uninterrupted solution. In this paper, grounding grid performance indices such as Ground resistance( Rg), Mesh voltage (Em), Step. It is probably the biggest source of uncertainty in a ground grid analysis due to the many variables involved, from testing to data interpretation and implementation. 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. In this paper, grounding grid performance indices such as Ground resistance( Rg), Mesh voltage (Em), Step. Sulphur Hexafluoride insulation testing. N2 - We propose here a cost-effective, realistic method for testing the continuity of the grounding grid and for identifying its weak points or discontinuities. Substations are the building blocks for any grid. This realization has driven the U. 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. However, experience has shown it is almost always cost beneficial to also test the ground grid instead of attempting just to model the grounding system. We will discuss the air and gas insulated substations. AU - Ma, Yan. This section will present an introduction to the information used in conducting a GPR study and why it is gathered. A Substation Apprentice will gain a working knowledge of substation equipment, electrical wiring and testing through the program. Verify that the grid is buried 18 inches (0. (PSE) can assist you in meeting the challenges of increasing loads and the increased requirements for metering, control, and monitoring. ABB has been automating those substations ensuring highest interoperability, thanks to international standards like IEC 61850, and providing grid operators and owners with highest efficiency and increased productivity. The substation earthing system comprises of a grid (earth mat) formed by a horizontal buried conductors. Thermal imaging technology can improve the reliability and security of electric substations. Each piece of equipment is then connected to the control room, which is under construction. In this case one riser must come from the rod of earthing grid in x direction and other from y direction. See the complete profile on LinkedIn and discover Chintamoni’s connections and jobs at similar companies. electrical utility regulator has called “the most significant incident of domestic terrorism involving the grid that has ever occurred” — may have been. ” (Earth Resistance< 0. For further resources, why not check out our video support library and our electrical testing & electrical safety blog. They are owned by the User and can supply both civil users (schools, hospitals, etc. A novel method to get accurate status of grounding grid was proposed based on measuring magnetic induction intensity. Explore fundamental principles of grounding system design, the IEEE Std. This stepdown is from the transmission and grid level to subtransmission level. Abstract The main purpose of this paper is to acquaint the reader with various types of grounding systems prevalent in an Electrical substation and their importance. A well-designed grounding system will ensure reliable performance of the substation over its entire service life. The wind farm was designed to provide renewable power to the fast paced residential and commercial expansions in the area as well as to bolster the renewable generation capacity to the grid at large. All parts that carry ground fault current If should be monitored 24 GUIDE TO SUBSTATION GROUNDING AND BONDING FOR MINE POWER SYSTEMS by Wils L. shall be connected to the grid or to a ground bus connected to the grid. Federal and state environmental permit information was also included in this document for reference. Standard equations are used in the design of earthing system to get desired parameters such as touch and step voltage criteria for safety, earth resistance, grid resistance, maximum grid current, minimum conductor size and electrode size, maximum fault current level. It is probably the biggest source of uncertainty in a ground grid analysis due to the many variables involved, from testing to data interpretation and implementation. Some methods (e. Substation Secondary Asset Health Monitoring and Management System DOE Grant Award #DE- OE0000850 Kevin Chen & Lin Zhang Electric Power Group. Substations Whatever your requirements are in substation construction, Rising Edge has the investment in people, resources, and test equipment to complete your project, up to 500kV. All parts that carry ground fault current If should be monitored 24 GUIDE TO SUBSTATION GROUNDING AND BONDING FOR MINE POWER SYSTEMS by Wils L. Ground Grid Integrity test set, Portable and rugged 300Amp current supply to inject 300A at various nodes of the exposed substation ground grid to verify proper grid paths under the surface. This could likely happen if the fault is located a few miles away from the substation. Simple and detailed test me A review on testing and evaluating substation grounding systems - IEEE Journals & Magazine. Whether your bringing your site down for maintenance, new construction or a major repair we can provide you with an uninterrupted solution. Step-up Transmission Substation: Receives electric power from a nearby generating facility and uses a large power transformer to increase the voltage for transmission to distant locations. The standard defines, in general terms, parameters that should be used and/or considered in the substation grid design. On March 8, 2018, Hawaiian Electric Inc. Checking ground electrode impedance for commercial, industrial and residential buildings Most facilities have grounded electrical systems, so that in the event of a lightning strike or utility overvoltage, current will find a safe path to earth. Client: Progress Energy Florida Location: Florida, USA. ERICO has met the standards and requirements of the Registered Continuing Education Providers Program. It is ideal for substation personnel with less than 2 years’ experience or meter technicians who work occasionally in substations. Welcome To Global Substation Services, Inc - Founded in 1998, Global Substation Services has a team of professionals with over seventy-five years of combined experience. substation steps up voltage to a transmission voltage for the grid. plex substation grounding system. Minimum Electrical Clearance As Per BS:162. Electric Power eTool: Illustrated Glossary - Substations. This fundamental course leads you through a step-by-step study of the substation design and construction process. The grounding source must be on or very close to the ground level and must be the effective ground as specified in the CPUC General Order (G. Soil testing and soil data is typically provided by others. Grounding system testing. Ground potential rise also mainly depends on the length and numbers of ground rods and grid spacing. Originally named for smaller power plants that were converted for other purposes, “substation” is now a general term for a facility that can serve a wide variety of critical roles on the power grid. Post-installation testing and commissioning are just one part of our fast-track, full-service offerings. Few practical methods exist for comprehensively testing such grounding systems. The current and voltage test circuits are configured separately (see circuits plotted by the red and blue lines, respectively). Also, often observer points are located in terms of “ground range” – this is the distance, along the Earth’s surface, from GZ to the. The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion. 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. Remote earth: A theoretical concept that refers to a ground electrode of zero impedance placed an infinite distance away from the ground under test. Good grounding path of. Corrosive cracking of the grounding conductor is the main cause of deterioration of grounding grid performance. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. Presentation Summary : A minimum value of the substation grounding system resistance in uniform soil can be estimated by means of the formula of a circular metal plate at zero depth. Some industries may require power at these voltage levels. Depending on the size of the facility being tested, Liberty Consulting uses fit for purpose test equipment to accurately measure earth grid impedance, step, touch and transfer voltages, earth potential rise (EPR) contours, current splits in overhead earth wires and cable screens, and electrical. Testing and Inspection of Bonding/Grounding systems. The scheme operates to satisfy the requirements of National Safety Instruction (NSI) 30 "Appointment of Persons". Earthing is an integral component of any power system. EA Technology’s Earthing System Audit provides an essential assessment of the earthing system in and around substations and other power assets, along with the associated maintenance procedures. This paper will present Ground Potential Rise (GPR) causes, effects, variations in the values GPR in high voltage substations. An electrical substation is a critical resource in a power system. Substation) to an open public thoroughfare. The main issues related to ground grid design and determination of optimum method for substation mesh design is presented in this paper. The system grounding arrangement is determined by the grounding of the power source. n Fence is outside of ground grid area, but is not connected to the substation ground grid. The grounding grid system of a practical 220 kV substation is calculated by MATLAB program. substations where the MV line ends at the installation point of the substation itself. National Field Services' electrical reliability testing and maintenance services add extra assurance that your facility runs efficiently. and-touch potential levels. We offer an experienced, full-service engineering group backed by decades of fabrication experience in standard steel, concrete and hybrid structures for power companies all over the world. Dig at sample of intersections and make sure below grade connections are used. The particular case of ground testing in substation maintenance includes many types of tests and related equipment depending on the objective sought; regarding the condition of the whole ground grid for the safety performance of the grounding system in the substation, the following solutions are included in the Raptor System:. This could likely happen if the fault is located a few miles away from the substation. Interconnection evaluations and studies usually result in a proposed plan of service for physical and communications interconnections. org 1 Technical Specification 41-24 Issue <1> 2016 Guidelines for the Design, Installation, Testing. Electrical Testing. However, experience has shown it is almost always cost beneficial to also test the ground grid instead of attempting just to model the grounding system. " (Earth Resistance< 0. All of the pertinent accessories of the transformer, including the load tap changers (LTC), lighting arrestors, pressure relays, and bushings will be cleaned and tested for the most optimal and comprehensive test results. V operating devices. In 2011, INMR visited two major grid projects – one being a new double circuit 400 kV line and the second a new 400 kV GIS substation in the Czech Republic. The initial configuration consisted of dressing out two. Safe Work Practices on High Voltage Substation Apparatus Revision No: 3 Page 8 of 19 Situation Hazard Control Reference HV Power Capacitors may retain an electrical charge Retained electrical charge hazardous to persons even after the apparatus has been isolated fro m the source of supply. Plant Integration, Erection and Test & Commissioning GE Grid Solutions Januari 2012 – Saat ini 7 tahun 10 bulan yg lalu. 80-2013 - Guide for Safety in AC Substation Grounding; IEC 60479 - Effects of Current on Human Being and Livestock; Proven algorithm in use by utilities both locally and internationally. Substation safety issues are reviewed, and trainees are introduced to one-line diagrams used in the power industry. Grounding conductors are sized according to the equation A = KI√S, where A is the cable size, commonly in circular mils, K is the connector factor, I is the maximum fault current and S is the maximum fault time, in seconds. Maintaining step and touch voltages below tolerable limits is basic to a safe ground grid design. Some methods (e. Ground impedance measurements in High, Medium Voltage substations, buildings etc Measurement of ground impedance using all methods depending on the grids' dimension, the surrounding area etc. 1 Existing electrodes Usually the grounding grid is calculated and tested according to IEEE 80/2013 or BS 7430/2011 or else. Tri-Point Substation Services designs, builds and installs temporary substations to suit your specific system requirements. Those roles depend on which parts of the electrical. Step-down transmission substations are located at switching points in an electrical grid. Renovating the Grid and Revitalizing a Neighborhood 2 To exploit IEC 61850, KCP&L installed an interface that acts as ^a distribution SCADA system within the substation, _ Hedges says. Complex grounding systems consist of multiple ground rods, connected, mesh or grid networks, ground plates, and ground loops. These systems are typically installed at power generating substations, central offices, and cellphone tower sites. Saber Power Services - Houston, TX - Senior Electrical Technicians with experience in transformers, oil-filled breakers, infrared surveys testing, breakers, switchgear, relay calibration, setting, repair, coordination, Junior Technicians with schooling or any related experience, operations support Personnel, project management, etc. Evaluation of Grounding Performance of Energized Substation by Ground Current Measurement J. GroundRod - AC Substation Earthing Tutorial 2 3. With the. Static Synchronous Compensator (STATCOM) solutions to Power Grid Corporation of India Ltd. This paper presents an approach to test the integrity of the grounding grid in a general framework of IEEE Std. To expand my experience as part of a team or in a senior position as needed, through a dynamic work designing & testing Substations, following the Installation on site, on both onshore and offshore locations. Multifunctional Primary Testing System. View Umair Ahmad’s profile on LinkedIn, the world's largest professional community. What are the specific requirements or guidelines for testing industrial grounding grid? in AC Substation Grounding reanalyze the grid to ensure you don't have. Tying the fence ground into the main ground grid, as shown in Fig. The COSI product range serves both AC (up to 1200kV) and DC (up to 800kV) transmission systems as well as high current DC applications such as aluminum electrolysis companies, and enables full IEC 61850 implementation for the smart grid networks of today and tomorrow. Performing Substation Ground Grid Test Using GGT500 Beneath every substation there is a ground grid which provides proper grounding of all apparatuses in substations. In this Video , I mentioned the basic steps for designing power substation grounding grid using custom code/program made under MATLAB environment. Saber Power Services - Houston, TX - Senior Electrical Technicians with experience in transformers, oil-filled breakers, infrared surveys testing, breakers, switchgear, relay calibration, setting, repair, coordination, Junior Technicians with schooling or any related experience, operations support Personnel, project management, etc. Corrosive cracking of the grounding conductor is the main cause of deterioration of grounding grid performance. N2 - We propose here a cost-effective, realistic method for testing the continuity of the grounding grid and for identifying its weak points or discontinuities. Methods of measurements according to international standards are the following. Applying a spe-cific percentage rule such as the 61. The design and testing of earth grid systems is necessary to ensure compliance with safety regulations and to ensure public safety. #01: 01-30-06 055103 Page 3 of 7 17. Grounding system testing. And the whole ground grid thing is crazy once you get away from overhead tubular construction. The ground bond test (also called PE resistance test, ground continuity test), is the first test required by the electrical safety testing standards. Low incidences of mal-operation and spurious alarms” It was concluded that “The (Cresatech CuTS®) monitors adequately detected when earthing was removed or tampered with during testing”. The fence is connected to a separate grounding conductor. Coupling Effect in Substation Ground Measurements 317 time, the technique should encourage avoidance of labor-consuming calculations. the measured and calculated values of current densities of grounding grid [7],[1]. of the substation must be properly characterized in order to accurately model and design the ground grid. Amendment No: 6 Substation Maintenance Instruction Major substation earthing system test IMPORTANT DISCLAIMER As the information contained in this publication is subject to change from time to time, Endeavour Energy gives no warranty that the information is correct or complete or is a definitive statement of procedures. Arc Flash Hazard Services. Session 5 – Substation Layout • Design inputs • Substation layout selection • Air insulated substations. If you are looking for something specific, don't hesitate to contact us. Before 1960s the design criterion of substation earthing system was "low earth resistance. This primary current injection testing system is designed to perform primary tests requested in substations commissioning. Ground Grid Design Made Simple. The wind farm was designed to provide renewable power to the fast paced residential and commercial expansions in the area as well as to bolster the renewable generation capacity to the grid at large. Ground Potential Rise (GPR) The substation earth grid is used as an electrical connection to earth at zero potential reference. The three-phase power leaves the generator and enters a transmission substation at the power plant. View Chintamoni Ghosh’s profile on LinkedIn, the world's largest professional community. DC Systems today announced the release of its RT Smart Grid Platform Version 6. Introduction to Substations Annotated Instructor’s Guide Module Overview This module introduces trainees to the function of substations at all levels of the power grid, with an introduction to typical substation components included. 1 Existing electrodes Usually the grounding grid is calculated and tested according to IEEE 80/2013 or BS 7430/2011 or else. ERICO has met the standards and requirements of the Registered Continuing Education Providers Program. The means of egress includes the exit and the access to the exit. Therefore, the meter reading on a test instrument will not represent the ground bed resistance accurately. Kinectrics' substation grounding systems discusses the design, numerical models, regulations of substation grounding systems, test methods used, and the relationship between people, equipment and grounding systems. Due to the presence of water particles and air gaps in soil, grounding grid is subjected to soil corrosion. The scope of the work included the turbines, collection, and switching stations. The purpose of this paper is to report a new test method and make a recommendation to improve the procedures according to the findings. When an electrical installation includes a High Voltage component, such installation shall not be energized until a testing and commissioning report is provided to the City Electrician by an. The largest voltage drops will occur for faults occurring far from the transformers. mm, shall be installed by the contractor at each site in excavated trenches at 300 mm depth or, where permitted, in formed concrete cable trenches. Earthing is an integral component of any power system. Explore fundamental principles of grounding system design, the IEEE Std. AU - Kucuksari, Sadik. These systems are typically installed at power generating substations, central offices, and cellphone tower sites. Sub stations on Site have a ground grid located under the rocks, but if an individual is located outside this area and while standing on the earth, touches a ground or a grounded object, a difference in potential may exist during a ground fault. Primary injec. They are owned by the User and can supply both civil users (schools, hospitals, etc. Provision of adequate grounding in a substation and switching stations are very important for the safety of operating personnel as well a electrical devices do not rise above tolerable thresholds and that the earth connection is rugged to dissipate the fault to the earth. Rapid analysis and safety evaluation for various earthing grid configurations for determination of most economical design. The internal diameter should not be smaller than 38 mm and it should be 100 mm fore cast Iron pipe. What does a good grounding. The length of the pipe electrode should not less than 2. These “middle man” stations work to deliver power from the main generators to the end user. a fault diagnosis method for substation grounding grid… verified by conducting software simulation, scale model experiments and field experiments. Advanced Electrical Services Ltd. Otter Tail Power Company Guidelines for Generation, Tie-Line, and Substation Interconnections ii. Note that while grounding electrodes can vary from a single rod to a grid or array that is several M easuring Ground Resistance — The Fall of Potential Method by Jeff Jowett AVO International hundred feet across, the fundamentals of testing are the same. This is a major route by which primary current returns to the substation. • Carried out substation grounding design studies using CDEGS software. GROUND SYSTEM DESIGN/TESTING. But many global cybersecurity analysts have a much larger theory about the endgame of Ukraine’s hacking epidemic: They believe Russia is using the country as a cyberwar testing ground—a. These systems are typically installed at power generating substations, central offices, and cellphone tower sites.