Evolving the Distribution Network to Deliver Reliability into the Future

By Martin van der Linde – General Manager Marketing at NOJA Power

Cost effective and omnipresent, the overhead electricity network is here to stay. Despite the advent of grid scale distributed generation, rooftop solar and asynchronous sources, the distribution network’s likely trajectory is the operation of an electricity marketplace, acting as abroker between generators and loads, energy manufacturers and consumers.

Broken Conductors and Negative Sequence Overcurrent Protection

By Martin van der Linde – General Manager Marketing at NOJA Power

A scenario of nightmares for the Power Systems Engineer is the occurrence of a broken conductor. The vast majority of network protection elements are designed to operate when there is too much phase current, but in the case of a broken conductor it’s the absence of current that is of concern.

Achieving High Resolution SEF Protection on the Overhead Distribution Network

By Martin van der Linde – General Manager Marketing at NOJA Power

Sensitive Earth Fault (SEF) protection has been omnipresent in the Australian electrical distribution network for many years. SEF Protection aims to address outlying fault conditions that are not covered by conventional Overcurrent and Earth Fault (EF) protection relaying techniques on distribution feeders.

Why the World Needs Synchrophasors

By Martin van der Linde – General Manager Marketing at NOJA Power

Amongst technical practitioners of electrical engineering, consensus has emerged in defining distribution network zeitgeist challenges. The beloved high inertia network of antiquity has left us abruptly, powered by the economic and environmental drivers of renewable generation and non-linear loads. The new normal, low inertia, asynchronous loads and generation, brings a host of technical challenges that evade resolution by traditional methods.

R-GOOSE in a recloser - What could it mean?

By Hernán Santana - Test Engineer, NOJA Power

Abstract—The increasing acceptance and growth of IEC 61850 in the power automation system have brought routable GOOSE (R-GOOSE) which will simplify the way to communicate IEDs for making a smart grid. This article discusses the benefits of having R-GOOSE in a recloser and its applications for distribution automation systems.

Using IEC 61499 to achieve Smart Grid Automation through Interconnected Distribution Reclosers

Martin van der Linde (Sales Engineer – NOJA Power/B.Eng, B.BusMan)

Industrial automation has been around for many years, in the realm of fast local connections controlled within a small network. IEC 61131-3 has been extensively used for logic implementation in PLC, but it is the advent of IEC 61499 and event based logic processing that we have seen a proliferation in usage of IP based distributed control.

With the growing capabilities of IP based communications for pole top switchgear within utilities it seems a natural progression to allow for distributed logic to be executed across a distribution network as a whole, using the current communications medium and framework as the transporter and a VPN for security. This paper explores the new capability of using IEC 61499’s logic design in pole mounted reclosers to create customised distribution automation and smart grid capabilities without the need for master station control. By sharing the hardware requirements across an entire network of recloser controllers, it is possible to create elegant and responsive algorithms to improve network reliability.

Access to IEC 61499 application design and implementation allows for improved integration in IEC 61850 schemes for recloser control. IEC 61499 offers expanded portable configuration options with information links through definable Dynamic Data Type objects available for access by both protocols in a centralised database within a controller. This paper outlines the capabilities and future applications of IEC 61499 in the world of pole mounted reclosers. As Australian utilities look for the best return in their capital equipment, this new implementation allows for the optimisation of switchgear for maximum return and value for distribution network operators.

Integrating renewable energy sources into smart grids using Automatic Circuit Reclosers

By Steven Keeping (Technology Writer)

There is global momentum to diversify electricity generation sources for economic, environmental and security reasons. “Distributed generation” (DG) enables more companies to enter the electricity market stimulating competition, encourages the development of renewable energy (RE) and limits the impact of events such as cyber attacks. However, conventional electricity distribution networks are poorly matched to the needs of DG because they were designed to meet the demands of large generating capacity sited close to population centres.

Single phase earth faults solutions using reclosers to meet the demands of the modern network

By David Dart (R&D Director - NOJA Power)

The advent of the microprocessor protection relay within a recloser controller has allowed the introduction of a significant number of new protection features and functionality. In parallel to these enhancements the recloser switch has transformed into an extremely reliable switch which operates in a significantly faster time based on the use of the current technology of a vacuum interrupter with an optimised magnetic actuator.

Using the smart grid to mitigate the impact of electric vehicles on future electricity demand

By Steven Keeping (Technology Writer)

Abstract: The electric vehicle (EV) has been subject to rapid development by major automakers and modern EVs are capable of completing 85 percent of typical journeys on a single charge. This, together with reductions in the purchase price, is making the EV an increasingly practical alternative to a conventional vehicle leading to significant growth in the size of EV fleets over the next few decades.

Carbon Emission Reductions by the Implementation of a Smart Grid

By Steven Keeping (Technology Writer)

Abstract: A smart grid – a computerised electricity transmission and distribution network incorporating monitoring, reconfiguration and real time feedback – promises to revolutionise energy delivery by lowering costs, minimising outage frequency and duration, and simplifying the interfacing of renewable energy sources to the system.

Only Smart Reclosers Build Smart Grids

By Neil O'Sullivan (Managing Director) / Bruno Kimura (Brazil Managing Director)

Abstract: Smart Grid is on the agenda of almost every utility in the world today. A true Smart Grid starts with the automation of utilities distribution networks and a key building block for the automation of distribution networks is reclosers. What do reclosers need to provide this building block? This paper attempts to summarise the solution.