By Rannveig S. J. Loken, Statnett, Norway This article is based on some parts of the work in CIGRE WG B5.69 published in TB 949, “Experience Gained and Recommendations for Implementation of...
Issue 074 December 2025
Cover Art
Cover Story
Featured Articles
Synchronous Machine Protection of the Future for Large Hydro
By Janos Pattantyus, Denis Francesconi and Jean Raymond, Hydro-Quebec, Canada In recent years, Hydro-Quebec has been developing a new synchronous machine protection paradigm for its future...
Leveraging IEC 61850 one step at a time: Practical experience of...
by Birkir Heimisson, Landsnet, Iceland Six years into Landsnet’s (Transmission System Operator of Iceland) digital journey, it is a good time to pause, reflect, and look ahead. Since 2019, when...
Experience feedback from the development of IEDs for the R#SPACE...
by Volker Leitloff, Rte, France, Joao Peres, Efacec, Portugal, Johann Maincent, SCLE, France, and Patrick Montaner, GE Vernova, France Rte is the Transmission System Operator of the French high...
Virtualized Line Differential Protection: Unleashing the Power...
By Brant Heap and Anthony Sivesind, Salt River Project, USA, and Marco Nunes, ABB Switzerland Introduction – Evolution of Line Differential Schemes: Line differential protection has evolved...
Editorial
Editorial – Issue 074 December
Twenty Years of Process Bus: Transforming Digital Substations by Alex Apostolov, Editor-in-Chief In the past two decades we have witnessed a fundamental transformation in PAC through process bus...
Last Word
Last Word – Issue 074 December 2025
The real process bus by Alex Apostolov, USA The process bus plays a central role in the digitization of the electric power grid by replacing traditional hard-wired copper connections between primary...
The Guru
Interview with PACWorld Guru: Prof. Dr. Seung-Jae Lee
Xxx PAC World: When and where were you born? S-J.L.: I was born in November 1955 in Seoul, Korea. PAC World: Where did you grow up and where did you go to school? S-J.L.: I grew up in...
History
History of Earth Fault Detection in the 1910s, Earth Fault...
by Walter Schossig, Germany, and Thomas Schossig, OMICRON electronics GmbH, Austria As described in previous articles, in most countries, such as the USA and England, the neutral point of generators...
News
PAC WORLD – Power outages, December 2025
By Rannveig Loken, Norway Abuja, Nigeria: Nigeria’s national power grid collapsed after a generator tripped, triggering a cascade of failures across the system. Frequent power grid...
SEAPAC
The event brought together protection, automation, and control specialists from across the Asia-Pacific region. Organized under CIGRE Australia’s B5, the conference continued its tradition as...
PAC World Americas Conference 2025
The event was held 11-14 August 2025 at the Raleigh Convention Center, Raleigh, NC, USA. PACWAC brought together global experts, utilities, manufacturers, researchers, and consultants in protection...
CIGRE Symposium
The event was held from September 29 to October2 2025 in Montreal, Canada. The CIGRE Symposium was held at the Palais des Congres de Montreal, Quebec, Canada. The topic of the conference was Grid...
APAP – 11th International Conference on Advanced Power...
APAP 2025 was held from October 20 to 23, 2025 at the Phoenix Island Resort in Jeju, Korea. The theme of the conference – “Empowering Tomorrow: Smarter Grids, Greener Futures” – guided...
30 Years IEC 61850
The first parts of edition 1 of IEC 61850 were published in 2003 and 2004, which is just over 20 years back. But the standard’s history started several years before that. The initiated founding...
ARCO400- Anti-Islanding Protection Testing
Distributed energy resources (DER)require reliable anti-islanding protection for secure grid integration. OMICRON’s ARCO Control 1.60 software update boosts the ARCO 400’s capabilities for...
Future-proofing power grids with zenon
In today’s fast-changing energy business, stabilizing the grid is any utility’s top priority – and zenon is the cutting-edge toolkit. The revolutionary application is fully compatible...
CIGRE Innovation and Education Fund
CIGRE are introducing the Innovation and Education Fund, a global program providing grants for electricity research, scholarship and education initiatives for the energy transitions. CIGRE are...
Modular Automation Controller Enhances Substation Operations
Schweitzer Engineering Laboratories, Inc. (SEL) has released an upgrade to the SEL-2240 Axion® Real-Time Automation Controller (RTAC) modular platform. The upgraded Axion delivers 5 times the...
Industry Updates
IEC TC 57 WG 17 Update
IEC 61850 is not the only protocol by Tom Berry, Schneider-Electric IEC TC 57 WG 17 is in charge of power system intelligent electronic device communication and associated data models for microgrids...
IEEE PES PSRC Update
IEEE Power & Energy Society (PES) Power System Relaying and Control (PSRC) Committee PES Power System Relaying and Control (PSRC) Committee is responsible for the development of standards, guides...
CIGRE Study Committee B5
by Peter Bishop, Transpower NZ Ltd, New Zealand News from CIGRE Study Committee B5 Protection and Automation SC B5 joined 11 other study committees and participated in the CIGRE international...
IEEE PES PSCC Update
by Eric Thibodeau, Hydro Quebec, Quebec, Canada The conclusion of summer 2025 provided the backdrop for another successful and productive meeting of the IEEE PES Power System Communications and...
Keith replaces Christoph (an introduction)
by Keith Gray, POWER Engineers – a member of WSP, USA I am honestly humbled to be in this position, surrounded by so many incredibly smart and motivated people. I have a lot to learn, and I am...
