EA Technology

Capenhurst, United Kingdom

EA Technology

Capenhurst, United Kingdom
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Yu J.,SP Energy Networks | Smith K.,SP Energy Networks | Urizarbarrena M.,SP Energy Networks | MacLeod N.,Parsons Brinckerhoff | And 2 more authors.
IET Conference Publications | Year: 2017

ANGLE DC is an innovative project which will convert two existing AC distribution circuits from the island of Anglesey to the Welsh mainland to operate as DC circuits. At present, there is a double circuit 33kV AC connection between the Llanfair PG sub-station on Anglesey and the Bangor 33kV sub-station on the mainland. For the ANGLE DC project, the 3-phases of one AC circuit will be connected in parallel to form the positive conductor and the three phases of the other AC circuit will form the negative conductor. At each end of the circuit, an AC - DC converter will be installed. The use of Voltage Source Converter (VSC) technology for the converter inherently provides reactive power control capability on both AC networks, which will improve the voltage profile in the local region and hence reduce the operating losses in the networks. A key feature of the project is the retention of the existing AC cables and overhead line; hence attention was paid to the choice of DC voltage and DC current to avoid over-stressing the existing asset, parts of which are in excess of 50 years old. As discussed in the paper, the voltage was chosen to be ±27kV and the current was chosen to be 556A. This gave a scheme power rating of 30.5MW, which is a 23% increase in transmitted power capacity from the existing operational limit of 24.8MW. Initial voltage testing of the cable at 38kV indicated that operation under DC stress was possible and that no significant partial discharge was measured. To provide condition monitoring on the cable, an on-line partial discharge detection system will be installed when the circuits are converted for DC operation. The ANGLE DC project will demonstrate the viability of converting existing AC assets to DC operation and the up-lift in power transmission which can be achieved. For future applications, with less concern about the age of the assets, higher power up-lift may be anticipated.


Bryans R.,TNEI Services | Bebbington M.,Scottish Power Energy Networks | Yu J.,Scottish Power Energy Networks | Smith K.,Scottish Power Energy Networks | And 2 more authors.
IET Conference Publications | Year: 2017

This paper investigates the real-time control of a Point to Point DC link. The DC link will be used to simultaneously control both power flow and voltage within a constrained distribution network. The operational envelope, overall control strategy, control hierarchy and communications strategies are discussed. The high levels of demand and distributed generation give rise to a wide range of operating conditions under which the link must operate. This paper assesses the feasibility of using a local control system to control the DC link and manage fast acting response schemes. A local control system is shown to be capable of operating within an N-1 operational envelope, to limit the risk of operating the network outside thermal and voltage limits. The concept of a central control system, using SCADA data from the wider network to optimise the setpoints for the DC link, is also discussed.


Cross J.D.,EA Technology | Hartshorn R.,Scottish and Southern Energy Power Distribution
IET Conference Publications | Year: 2016

The My Electric Avenue Project studied the impact of electric vehicle uptake on Britain's electrical distribution networks by monitoring 200 customers for 18 months. Customers also trialled a new demand side response technology which delayed charging to support the distribution network. At current projections, we find that upgrading Britain's low voltage infrastructure to accommodate electric vehicles will cost consumers approximately £2.2bn by 2050. This cost can be largely avoided if demand-side response is deployed to shift vehicle charging away from times of peak demand. Customer response to DSR has been found to be positive with no statistically significant difference in acceptance between customers who experienced DSR and those who did not. © 2016, Institution of Engineering and Technology. All rights reserved.


O'Brien D.,EA Technology
IET Conference Publications | Year: 2013

The article presents development and implementation of an integrated asset risk prioritisation (ARP) tool on UK power networks. Asset Risk and Prioritisation (ARP) builds upon existing methodology of Condition Based Risk Management (CBRM) and shift of strategy from pure replacement to include refurbishment / asset life extension and more focus on TOTEX.


News Article | October 13, 2016
Site: cleantechnica.com

Batteries are going to get bigger. They are going to charge faster. People will become more comfortable with the range of new electric cars. “Electric Nation” brings well over 500 EVs together —  to all charge at once — as an expression of the future to come. As I pull into an empty spot for EV charging, next to another empty spot for EV charging, I do wonder: When more people do catch on and find out how smooth it is to drive electric, will it be this easy? Will more electric cars charging all at once overload the grid? What happens when everybody is plugging in their car at a similar time? Will there be blackouts? Robert Llewellyn talks to others — with a lot more to offer — who are wondering as well. Who is going to keep balancing the electric power energy grid? What is vehicle-to-grid technology? Electric Nation is a project to find out what happens when hundreds of electric cars all plug in at the same time and to prepare for the EV revolution. The Electric Nation project is being hosted by Western Power Distribution. It is being delivered by a partnership of EA Technology, DriveElectric and Lucy Electric Gridkey. The project is funded via Ofgem through its Network Innovation Allowance scheme. The project aims to provide local electricity network operators with the tools to be able to ensure that their networks can cope with this massive new challenge, whilst avoiding replacing cables and substations. Robert Llewellyn, as animated and thoughtful as ever explored the topic in his most recent episode of Fully Charged. He interviewed some participants at the Cenex Low Carbon Vehicle Event 2016 in the UK. Check it out: Buy a cool T-shirt or mug in the CleanTechnica store!   Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech daily newsletter or weekly newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter.


Wilson S.D.,EA Technology | Stewart P.,University of Lincoln | Stewart J.,University of Lincoln
IET Electric Power Applications | Year: 2012

Real-time thermal management of electrical machines relies on sufficiently accurate indicators of internal temperature. One indicator of temperature in a permanent-magnet synchronous motor is the stator winding resistance. This study applies two current injection techniques to a commercially produced permanent-magnet servomotor, which are applicable under load and cause minimal disturbance to the shaft torque. The current injection techniques applied here enable the temporary boosting of resistive voltage and consequent application to low-resistance, high-voltage machines. The effectiveness of the approach is demonstrated by tracking the change in winding temperature during a 2 h load cycle. © 2012 The Institution of Engineering and Technology.


Gillie M.,EA Technology | Nowell G.,EA Technology
IET Conference Publications | Year: 2013

Electric vehicles are becoming more commonplace on our streets, and already, small pockets, or 'clusters' of EV owners are forming. If clusters of EVs on one feeder all charge during the normal peak electricity demand, this could overload feeders resulting in network operators having to implement costly reinforcement. However, during off peak times there is existing capacity on local feeders. A system to allow direct control of charging of EVs has been developed called Esprit. To test the system, clusters of EVs need to be 'created'. This is being carried out via the Ofgem Low Carbon Networks Fund project 'My Electric Avenue' (I2EV). In return for a reduced monthly charge on an 18 month lease, participants will allow their EV charger to be controlled, data to be collected and will provide feedback on their experience. The success of this trial relies on close working between Distribution Network Operators, technology developers, communities, EV manufacturers, academics and car leasing companies.


Hughes D.,EA Technology | Barnfather P.,EA Technology | Harrison A.,EA Technology
IET Conference Publications | Year: 2013

Over the past 12 years the authors and colleagues at EA Technology have worked with Electricity Distribution and Transmission companies in many countries developing and applying asset based risk models to assist with planning and justifying investments. Initially the work concentrated on building detailed asset models that quantified the risk (expressed as £, $ or €) arising from deteriorating asset condition (Condition Based Risk Management, CBRM). Over the past 2 years the authors have continued the development of the methodology by applying it to the quantification of load related risk and have succeeded in creating a process that combines load and condition based risk. The essential output from the combined model is a measure of risk (expressed as £, $ or €) now and in the future, reflecting both the changing condition of the assets and changes in load. Potential interventions, replacement of assets or reinforcement of the network can then be factored in and the resulting risk re-quantified. This provides the means to compare the cost benefit of different potential interventions and ultimately to justify specific investment plans (using NPV or similar financial analysis).


Dudek E.,EA Technology
IET Seminar Digest | Year: 2015

Introduction Efficiency and value of storage System Integration Difficulties in estimating state of charge and degradation Practical issues and future work. © 2012 BSI. All rights reserved.


Roberts D.A.,EA Technology
IET Seminar Digest | Year: 2010

Presents a collection of slides covering the following topics: generation intermittency management; transmission interface management; distribution interface management; smart metering benefits maximization; and domestic consumption management.

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