Migrating from SONET/SDH and TDM to IP/MPLS for Reliable Protection and Control in Electric Utilities By Mauricio SUBIETA, Ph.D., CISSP, Energy CTO and Head of Technology Nokia, USA Electric...
Issue 076 June 2026
Cover Art
Cover Story
Featured Articles
Centralized Line Differential Protection Using Inter-Substation...
By Philipp Stachel and Torsten Schumacher, Siemens AG, Germany, Yann Gosteli and Stefan von Glutz, CKW AG, Switzerland, Adolf Frei and Ramon Bächli, Hitachi Energy, Switzerland Line differential...
FLISR Applications for the Protection of Distribution Systems
By Alexander Apostolov, USA Fault Location, Isolation, and Service Restoration (FLISR) is a key distribution automation technology used by electric utilities to enhance grid reliability, reduce...
5G-based line differential protection: Practical results unveiled
By Rene Troost, Amadou Louh and Joey Goderfrooi, Stedin, The Netherlands, Andrej Goerbing, Vincenzo Fiorentino, Philipp Staschel and Volker Gsaenger, Siemens, Germany, Sebastiaan van Kuk, Alliander...
Constellation PAC – Issue 076 June 2026
Towards Large-Scale Deployment of Virtualized Line Differential Protection: Unleashing the Power of Routable-sampled values communication, a redundant and low latency approach By Brant Heap and...
How about without it?
by Fred Steinhauser, OMICRON electronics GmbH, Austria Adding something to an existing solution is a human reflex. This disposition lures us to favor an additive option when we want to improve or fix...
Walter Schossig is no longer with us…
We are deeply saddened that our long-time author Walter Schossig passed away on March 1, 2026.With his passing, the world loses one of its most distinguished experts in the history of protection and...
Editorial
Editorial – Issue 076 June 2026
Can’t live without it by Alex Apostolov, Editor-in-Chief Modern electric power systems are no longer defined solely by transformers, circuit breakers, and transmission and distribution lines. They...
Last Word
My favorite communications-based protection
by Alex Apostolov, USA Directional comparison protection based on superimposed components, also known as incremental quantities, represents one of the most important developments in high-speed...
The Guru
Interview with PACWorld Guru: Mark Carpenter from the USA
PAC World: When and where were you born? M.C.: 1952 Waco, Texas. PAC World: Where did you grow up and where did you go to school? M.C.: My pre-elementary school years were in Waco Texas...
History
History – Issue 076 June 2026
History of Earth Fault Detection in the 1930s, Earth Fault Compensation by Walter Schossig, Germany, and Thomas Schossig, OMICRON electronics GmbH, Austria As already the decade before the 1930s have...
News
PAC WORLD – Power outages, June 2026
By Rannveig Loken, Norway United Kingdom, Nottinghamshire, 3 March 2026 A man was arrested after 1,700 metres of cable were ripped out from under the highway in Nottinghamshire. Officers had...
Real-life case of Routable-GOOSE over MPLS-TP:
Implementation, Testing and Validation at Tele-protection Santa Rosa-Carapongo 220 kV line in Peru by Yony Machuca Huamaní, ISA ENERGÍA, Peru, Francisco Gonzalez-Longatt, Loughborough University...
Conferences – Issue 076 June 2026
Conference 01: DPSP Conference DPSP 2026 Conference was held 2-6 March 2026 at the prestigious IET London: Savoy Place, a venue renowned for its rich history, cutting-edge facilities, and central...
MV Protection IED
Hitachi Energy has expanded the REF650, a dedicated medium-voltage multi-function protection relay. Unlike broad-spectrum platforms, the REF650 optimizes complex protection schemes enabling value...
Enhanced Applications for PowerLogic™ P7
Schneider Electric’s PowerLogic™ P7 is a next-generation protection and control platform designed to enhance electrical system safety, reliability, and operational efficiency. With the latest...
EPR Modernizes the SIEPAC Transmission System
The SIEPAC transmission system serves six of the seven countries in Central America, spanning 1,800 kilometers from Guatemala to Panama. One utility, called Empresa Propietaria de la Red (EPR)...
6G – what, why, how?
6G is the next generation of wireless communications technology that is expected to succeed 5G and 5G-Advanced networks sometime around 2030. While 5G focuses on enhanced mobile broadband, low...
Increasing Substation Timing Holdover Accuracy
Meinberg is introducing a Rubidium Oscillator line card for its IMS series time servers. With digital substations requiring a 1µs time synchronization accuracy to UTC for merging units, clocks with...
Process Interface Device
ABB’s REX600 is a next-generation protection and control device that combines merging unit functionality, backup protection, and fault detection in a compact, DIN-rail-mounted design. It integrates...
LPIT expansion modules
Siemens is advancing digital substation innovation with the introduction of LPIT expansion modules in the SIPROTEC 5 modular platform, enabling seamless process-level connectivity through low-power...
Industry Updates
IEC 61850 Update
by Keith Gray, POWER Engineers – a member of WSP, USA IEC 61850-6-3, titled “Format of machine-processable rules for validation of IEC 61850 XML-based files”, was published in July 2025...
IEC TC 57 WG 17 Update
Microgrids and planning IEC 61850 “Edition 2027” by Tom Berry, Schneider-Electric IEC TC 57 WG 17 is in charge of power system intelligent electronic device communication and associated data models...
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 Preparations are now underway for the 2026 Paris Session, which will take place 23 to 28...
PSCC Update
by Eric Thibodeau, Hydro Quebec, Quebec, Canada The Power System Communications and Cybersecurity Committee (PSCCC) reconvened for its second meeting of 2026, jointly held with the Power Systems...
