Cdegs Earthing Software

[Shanel Arrendell]

Themost powerful and accurate suite of commercially available grounding (earthing) and electromagnetic analysis software packages on the market. 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, electromagnetic interference, electromagnetic fields and transient phenomena that can be tackled by CDEGS.

These packages come in many different flavors to provide cost-effective solutions (investments that pay for themselves by preventing overly conservative designs and unnecessary material and labor costs) adapted for problems ranging from simple grounding designs to the behavior of complex networks of aboveground and buried conductors energized by lightning or other transients. Refer to their respective pages for a detailed description of the differences and nuances between them.

It also includes the AutoGroundDesign, AutoGrid Pro and Right-of-Way Pro software packages, which use alternative interfaces to specific combinations of the computation modules that automate specialized tasks in grounding design, grounding analysis and interference studies, respectively. Five specialized packages are also bundled in the CDEGS package: SESShield-3D, SEShield-2D, SESEnviroPlus, SESTLC and CorrCAD. CDEGS is the full suite of software packages SES provides. All future updates, enhancements and additions developed by SES are provided without extra charges to customers that are under our yearly software support.

SES is an internationally recognized R&D pioneer and leader in the areas of power system grounding (earthing) and electromagnetic interference, including transient and lightning analysis. Its CDEGS suite of software packages is the state of the art in this field of expertise and an industry reference worldwide.

The use of computing power to check, evaluate or inspect concepts in all walks of life and business, is increasingly common. Whether you forecast the performance of stock and shares or building an Electrical Generation Plant.

For safe electrical earthing systems using engineering computer software such as CDEGS allows us to stress-test designs and systems to evaluate their performance under given conditions.

Additionally, this piece aims to highlight a fundamental limitation of current computer hardware and how supercomputing can unleash the range and scope of previously impossible scenarios for an investigation to resolve complex problems in our lives.

However, most earthing systems software continues to use a version of circuit theory-based calculations to work out earth fault return current levels, step and touch potentials and similar safety-critical data, which can lead to errors if all the data is anything less than perfect.

What electromagnetic field theory software does for the engineer is unchaining the range and scope of scenarios modelled. It expands the possibilities studied from specific single tasks. Like earthing fault studies, which are limited to 2-dimensional below ground calculations. To ABOVE GROUND equipment and their influence on surrounding structures and environments. For example, the effects from GIS (Gas Insulated System) equipment, EMI (ElectroMagnetic Interference) or nearby Data-centers, pipelines or process plant due to HV power sources (including lightning).

Lightning Transient Studies utilise the electromagnetic field theory capabilities by providing visual animated responses to a bolt attachment to infrastructure. And systems so that asset owners can see how their control systems might react to a direct strike. Answering the question, will the systems stand firm or fall over?

The introduction of electromagnetic field theory software has no doubt had a massive impact on possible scenarios to be studied but not without cost. Meaning, the increased levels of intuitiveness and complexity of the software place exponential demands on the hardware running the simulations/computations.

For example, a typical Transient Study, looking at how a system will respond to a lightning strike, needs to be able to compute hundreds of frequencies across millions of components. But, using currently available hardware, this kind of studies can take days, weeks, even months to calculate a single scenario.

This scope of study may have taken years using current hardware, but by fast-forwarding in time. GreyMatters is challenging the status quo by bringing this reality into the reach of all of us, today.

HV Earthing maintains a CDEGS software licence from Safe Engineering Services & technologies ltd. All aspects of the earthing system design are done using CDEGS: soil resistivity data inversion, earth grid modelling and current split analysis in the high voltage feeders.

With nearly 20 years experience using CDEGS software, HV Earthing are expert users of all engineering modules and can model the earthing system, overhead powerlines, high voltage cables to precisely calculate the prospective touch voltages, step voltages and earth potential rise (EPR) during earth fault conditions.

Being actively involved with Standards Australia by volunteering on an AS 2067:2016 earthing subcommittee, HV Earthing has demonstrated knowledge in the risk management principles in ENA EG-0, Argon software and how these tools can be used to satisfy the due diligence requirements of the WHS act.

Incorrect soil resistivity models cause delays, rework, unnecessary current injection testing, cost overruns, installation of too much earthing or worse, not enough. It is imperative that the soil resistivity is measured properly at he start of the project by an experienced earthing engineer using the best test equipment.

The switched DC waveform eliminates test errors due to inductive coupling between the test leads while the high peak-to-peak driving voltage maximises the signal penetration to reveal the resistivity of the deepest soil layers.

Our extensive experience in the assessment, design, modeling and analysis of HV earthing systems ensures that our team of specialists demonstrates compliance with the UK, National Grid, DNO, or international standards for a range of installations such as generation, transmission, distribution or industrial, operating at voltages between 11kV and 400kV. View Brochure NSoil resistivity measurements and analysisNPreparation of HV earthing system design drawingsNHV earthing system modeling and analysis utilizing SES CDEGS softwareNEarth Potential Rise (EPR) assessmentNCalculation of touch, step and transfer voltagesNPost-construction Fall of Potential (FOP) resistance measurement and analysisNThird-party design auditsNHV earthing system feasibility studiesNImpressed voltage studiesWhy Us for HV Earthing System Studies? Vendor-neutral and independent technical consultancy Expert knowledge of earthing system policies and specifications for transmission and distribution network assets Over a decade of successful earthing system project delivery experience Highly experienced team of innovative and creative thinkers focussed on developing solutions to complex problemsOur experienceEnoch Hill 33kV Onshore Wind FarmPSC were requested to undertake an HV earthing design study for the Enoch Hill 33kV onshore wind farm, in accordance with UK standards. As part of the study, soil resistivity measurements were analyzed to develop soil model for each turbine, the substation and overall wind farm. An earthing system design was produced for each turbine to achieve a resistance of less than 10Ω (where practicable) in accordance with BS EN61400-24. An overall earthing system design was produced for the wind farm and CDEGS earth fault simulation studies were carried out to determine the resistance of the proposed earthing system, the resultant EPR and, touch and step voltages at the site and to confirm the ITU (Hot / Cold) site classification. Read more>Nairn Road SubstationPSC were requested to undertake an HV earthing design study for the Nairn Road Substation, in accordance with UK standards. As part of the study, soil resistivity measurements were analyzed prior to designing the buried earth electrode system for the substation. CDEGS earth fault simulation studies were carried out to determine the resistance of the proposed earthing system and the resultant EPR and, touch and step voltages at the site.South Redhouse BESSPSC were requested to update the existing South Redhouse BESS earthing system to accommodate the inclusion of new HV plant, in accordance with ENA TS 41-24, BS EN 50522 and ENA ER S34. As part of the study, an earthing system design for the new HV plant area was incorporated into the existing CDEGS model for the substation and was simulated under single phase-to-earth fault conditions. The resultant EPR and touch and step voltages were determined to confirm site classification in accordance with ITU specifications and the safety of personnel within the site.Killala (Lisglannon) 38kV SubstationPSC were appointed to undertake an HV earthing design study for the 38kV AIS substation and associated wind turbines, in accordance with IEEE80, IEEE81 and ESBN specifications 18134 and 18133. As part of the study, soil resistivity measurements were analyzed prior to designing the buried earth electrode system for the substation and each wind turbine. CDEGS earth fault simulation studies were carried out to determine the resistance of the proposed earthing system and the resultant EPR, hot zone contours, and touch and step voltages at the substation and connected wind farm.Millvale Solar PV SitePSC were commissioned to design the Medium Voltage (MV) earthing system for the proposed Millvale Solar PV plant. The purpose of the study was to demonstrate that the earthing system will provide safe step and touch potentials throughout the site in accordance EN 50522. As part of the study, soil resistivity measurements were conducted and analyzed prior to designing the buried earth electrode system for the substation. CDEGS earth fault simulation studies were carried out to determine the resistance of the proposed earthing system and the resultant EPR and, touch and step voltages at the site.Latest News HV earthing design studies in urban areasFeb 28, 2024

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