Electrical HV Design Services

Reliable Answers for HV Design Services

30 years of experience means answers with our HV Design Services to even the most complicated of problems. After engaging GreyMatters you can breathe a sigh of relief – you can relax knowing robust design support is coming.

Our fully accredited HV design and Earthing Consultants have got your back in combination with using the latest top industry-accepted software (CDEGS, XGSLab, and ETAP tools). 

Studies Include in HV Design Services:

  • Relay coordination
  • Load flow
  • Short circuit
  • Motor acceleration
  • Transient stability analysis
  • Harmonic
  • Corrosion
  • Fault current distribution (or split)
  • Earth potential rise (EPR)
  • Ground potential rise (GPR)
  • Safety voltages (Touch and Step)
  • Lightning
  • HV Cable rating
  • Soil Resistivity and thermal resistivity
  • Planning feasibility
  • EM Interference
  • Stray Current

Design Services For our HV Design Services:

  • Electrical infrastructure planning including feasibility studies
  • Concept and Front End Engineering Design (FEED)
  • Primary design of HV substations (GIS/AIS)
  • Substation auxiliary systems design
  • Civil and Structural designs
  • Substation Automation System including SCADA
  • HV Cable systems design
  • Design services associated with PV and BESS
  • Development of functional and detailed specifications

Safety Calculations and Hot Site Assessment

So, whether routine equations. Or advanced computer simulation. Our safety calculations will deliver earthing design compliance. By using specialist software such as XGSLab and CDEGS. And bespoke MathCAD equations. Therefore, calculating Touch and Step Voltages. Meaning the modern-day fundamental safety-related quantum for a high-voltage electrical installation. Therefore assessment of the external environmental impact of earthing system design. By calculating surface voltages (Hot Zone). And transfer potentials to other nearby earthing systems or equipment.

Soil Resistivity Testing

The importance of a robust Soil Resistivity Testing model free from errors. Cannot be understated! The Soil Structure is a foundational requirement for every electrical earthing system design. – So, get this wrong and the subsequent electrical earthing system design will be flawed.

That’s why GreyMatters has invested in high signal injection specialist resistivity instrumentation, e.g. 400 – 800 V compared with the typical 50 V from the more common units like the DET2/2.

Always ask your earthing system design consultant. What signal voltage is being used for Soil Resistivity Testing? See a recent series of articles Soil Resistivity Testing 10 Common Mistakes. Click Below to check it out.

So, from Condition Assessment Surveys. Finite element analysis (FEA) software analysis using CDEGS and XGSLab. And field earth measurements. For high voltage applications from 11 kV to 1,000 kV (1 MV).

EMI and EMC Studies

Not all finite element software packages are made the same. Most earthing system design software continues to use circuit theory-based calculations. Therefore, when using circuit theory-based models to calculate the earth fault return current and the step and touch potential risk, using circuit theory-based models can lead to errors.
In contrast, finite element electromagnetic field theory software allows the engineer to analyse a massive range and scope of scenarios above and below ground.

Electrical Earthing Studies
  • Design of technically secure solutions, using the very latest best practices and software tools.
  • Fault current distribution modelling.
  • Rise of Earth Potential Studies (RoEP, EPR or GPR).
  • Safety Calculations for touch and step potentials.
  • Interference Studies.
  • Onsite Surveys and assessments.
  • Onsite FoP measurements.
  • Soil Resistivity Testing.
  • Soil modelling and analysis.
  • Post Construction Audits.
  • Stray Current Studies.
  • Earthing policy formulation.
  • CAD drawings of earthing layouts
Recently, Electrical Earthing Systems across the world have appeared to consolidate. And rationalise into a limited number of “foundational” standards. Which local codes are derived. These are typically based on IEC or IEEE versions.

Electrical Earthing Design Practice

  • BS EN 50522 Earthing of power installations exceeding 1 kV a.c. 
  • IEEE Std. 80 and 81 – A Guide for Safety in AC Substation Grounding. 
  • BS 7340 Code of practice for protective earthing of electrical installation. 
  • BS EN 50122 Railway applications Electrical safety, earthing and the return circuit. 
  • ENA TS 41–24. Guidelines for the design, Installation, Testing and Maintenance of Main Earthing Systems in Substations. 
  • EA Engineering Recommendation S34. A Guide for Assessing the Rise of Earth Potential at Substation Sites. 
  • EA Engineering Recommendation S36. Procedure to Identify and Record “HOT’ Substations and amendment. 
  • IEC 479-1, Effects of Current on Human Beings and Livestock, IEC. 
  • ISIS Practice EPT/PPS/B014, Working Practices at Electricity Stations, British Telecommunications.

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Want to have a conversation about making a real impact on your design, Great we can offer you technically secure design just fill out the form and contact us now!

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At GreyMatters, we understand that sometimes you may have specific needs that require additional assistance. That’s why we are pleased to offer a full range of design and field services to cater to your unique requirements. 

Whether you need help with a particular task or simply want more personalised support, our team is here to help you every step of the way. So, please don’t hesitate to reach out to us if you need any assistance. 

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Let's have a chat and let GreyMatters do the heavy lifting