Secure, interoperable functionality for power line carrier based infrastructures

  Power line carrier (PLC) based systems are proving an attractive and cost-effective solution for smart metering deployments in the residential domain. In Europe, PLC solutions have already been implemented widely in some countries, while others are at an advanced stage of planning for large-scale roll-out. The installed base in Spain (based on Prime Alliance […]

Not-so-smart metering: A consumer’s point of view

  Some municipalities have started installing smart meters at residential customer’s premises, and customers are about to enter a new era in electricity distribution. Smart metering, we have been told, not only allows the electricity utility to read the meter remotely, but can allow customers to monitor and control energy consumption and keep their own […]

Avoiding a substation explosion

  An authorised person closed an 11 kV oil circuit breaker (OCB) on to a fault at a main substation. The OCB exploded and the force of the blast blew off the substation doors, seriously damaging the building. The person broke his right arm, when the door behind which he was standing was blown open. […]

Protecting IEDs with deviation of power frequency

  The deviation of power frequency component (DPFC) is a fundamental principle employed in many protection IEDs. This principle is based on the concept of superposition, where the pre-fault load current and voltage can be subtracted from the whole fault current and voltage to obtain the pure fault components. Download the PDF

Extending the effective life of a transformer

  Power transformers are key components in any electrical network and to ensure the safe, reliable and optimum working life of the transformer, care is required to limit insulation moisture as one of the most important parameters that cause insulation degradation and reduction in service life [1]. There are also safe limits of moisture content […]

Live-line techniques in high voltage overhead transmission line repair

  by Patrick O’Halloran, City Power This short paper covers how live-line (energised) techniques can be utilised to restore supply as quickly as possible in the event that high voltage transmission towers have collapsed. Download the PDF