CIGRE B5 Industry Updates

CIGRE Study Committee B5

by Richard Adams, Ramboll, UK

News from CIGRE Study Committee B5   Protection and Automation

Following three recent successful CIGRE webinars based on recently published Technical Brochures, a further webinar on ‘Network Protection Performance Audits’ (TB 800) is planned for Wednesday 16th June at 1pm CET.

The planned CIGRE Symposium in Ljubljana, Slovenia has now been postponed from June to 21 – 24 November 2021. The theme is ‘Reshaping the Electric Power System Infrastructure’ and Rannveig Loken, Chair of SC B5, is Chair of the Technical and Scientific Committee and a member of the Steering Committee.

At this time, it is hoped that the Global situation will have improved sufficiently for the symposium to proceed as a physical event, and registration is expected to open soon.

The event website is:

The Paris Session is planned to be held from Friday to Wednesday 20 to 25 August 2021.The preferential subjects will be the same as for the eSession in 2020, but whilst the papers themselves were presented in 2020, the usual format of a Special Report and prepared contributions returns for 2021.

For B5, the preferential subjects are:

  • PS 1 Human Aspects in Protection, Automation and Control Systems (PACS)
  • Special Reporter:  Simon Hussey (IE)
  • PS 2 Communications Networks in Protection, Automation and Control Systems (PACS): Experience and Challenges

Special Reporter:  John Wright (GB)

The Special report for SC B5 has been released on the following website: Special reports | Cigre

The instructions for submitting contributions, including the deadline of 3rd August are on the first page of the report. It is still hoped that the session will be able to proceed as a physical event.

SC B5 will also host a poster session and a tutorial entitled ‘Protection, Automation and Control of the Evolving Grid’.

For the three new working groups decided at the SC meeting back in August, all three are now approved and seeking members:

  • B5.74 – Busbar Protection Considerations When Using IEC 61850 Process Bus
  • B5.75 – Documentation and version handling related to Protection, Automation and Control functions
  • B5.76 – Architecture, Standards and Specification for Metering System in a Digital Substation and Protection, Automation and Control (PACS) Environment

The latest Technical brochure (829) entitled “Challenges with series compensation applications in power systems when overcompensating lines” has been published. This Technical Brochure examines how series compensation increases the transfer capacity for long transmission lines. Overcompensation (compensation degree above 100 %) is sometimes an option in grid expansion.

No significant technical issues preventing overcompensating were found but overcompensation leads to a more complex power system and requires analyses on steady state and transient voltages, transient recovery voltages, resonances and protection aspects, described in the technical brochure.

This was produced by a Joint Working Group between SC B5 and C4 (WG lead).

The brochure can be downloaded free of charge by CIGRE members from the e-Cigre web site and can be purchased by non-members. Progress to complete other longstanding Working Groups remains good, with another Working Group expected to publish their work before the year end.


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Richard Adams is Team Leader – Engineering with PSC in UK. He has a degree in Electronic and Electrical Engineering, is a Fellow of The Institution of Engineering and Technology (FIET) and a member of the organizing committee for the IET DPSP (Developments in Power System Protection) conference. He is currently Secretary for CIGRE Study Committee B5, having been involved in CIGRE since 2003, initially as UK Regular Member, then later as a member of the Strategic Advisory Group. In 2020 he was awarded the CIGRE Distinguished Member award. Richard is married with three children and likes to get out walking if there’s time.