Power Network

HV Network Planning and Design

  • 9 available

Course summary

This course is built around the principle that HV planning and design tools are only as good as the person using them. To utilise planning tools effectively, good designers will fully understand what is required to be achieved and can recognise when outputs are incorrect.

This two-day course works towards this objective and combines the theory of network planning to relevant GB standards and legislation with the practice of carrying out load flow studies and calculations to ensure compliance with those standards. Fault Level, Voltage and Network Capacity Planning are all considered along with supporting knowledge in the areas of earthing design, basic HV protection and typical HV supply connection arrangements. The core concepts are reinforced through network design exercises using both hand calculations and software planning tools, enabling delegates to:

  • Understand how to configure power flow analysis tools in terms of slack bus, customer loads and generation.
  • Complete basic network studies required to determine compliance with GB standards.
  • Understand the studies required to determine the impact of generation and point of connections.

Course itinerary


  • Network planning within network constraints

Security and reliability

  • Licence conditions and standards
  • P2/6
  • Calculating network capacity
  • Understanding the balance between ratings and demand
  • Applying distributed generation for system support
  • Relating network equipment and network topology to the standard
  • Cost of loss of supply
  • P2/6 compliance exercise


  • HV network standards
  • Planning tools – customer modelling
  • Fault levels:
    • Equipment that is effected and why it has to be assessed
    • Introduction to G74 for determining contributions to short circuit currents at HV
  • Calculating fault levels and practical exercise

HV network earthing

  • Legislation and standards
  • Introduction to ROEP and impedance
  • Touch and step potentials
  • HV earthing design considerations
  • Hot or cold substation sites

HV protection systems

  • The role of protection systems
  • Types of protection found at HV.
  • Understanding the values


  • Programme for the day – recap of day 1

Customer connection equipment

  • Essential components of any connection
  • Representing customers and sources of data for use in modelling demand

Network modelling

  • Power system modelling
  • Network modelling exercise:
    • Creation of a slack bus
    • Building a primary substation
    • Building a cable network
    • Representing existing customers
    • Adding a new customer

Capacity and fault level studies

  • Capacity and fault level study practical – perform a study on the network model:
    • Perform a security of supply study
    • Compare fault levels with hand calculation exercise
    • Determine compliance

Power quality

  • Legislation and standards relating to power quality
  • Statutory voltage limits and network common practice
  • Harmonic distortion
  • Standards and limits relating to voltage dips and flicker and the sort of loads to which they refer
  • Impact of generation on networks
  • Voltage study practical

Open discussion

Programme may be subject to amendment.

Why attend?

  • Understand the constraints that compliant HV designs need to balance
  • Be able to set up a typical HV network model and use it to perform studies required for new load and generation connections at HV
  • Understand what model outputs mean and how they relate to the constraints being managed
  • Awareness of standards and regulations that apply to network design including P2/6 and G74
  • Appreciate the impact of regulation on designs
  • Use modelling software exercises and hand calculations to reinforce and apply key lessons.

Really useful course, enjoyed it and understood a lot more about how to calculate faults using the MVA base and good explanation of all the concepts discussed.

Mwitwa, 5-6 July 2022

Great presentations - brought my confidence up.

Amy , 1-2 November 2022

Very happy. Good approachable trainers.

Zayd , 5-6 July 2022

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