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Warrington, United Kingdom

Navarro-Espinosa A.,University of Manchester | Ochoa L.F.,University of Manchester | Randles D.,Electricity North West Ltd
2014 IEEE PES Innovative Smart Grid Technologies Conference, ISGT 2014 | Year: 2014

Significant penetrations of low carbon technologies in low voltage (LV) networks could result in voltage issues, thermal overloads of the lines, higher energy losses, etc. In this work, the meshed connection of LV feeders is investigated as one of the possible alternatives to minimise these impacts and, consequently, increase the corresponding hosting capacity. Two different technologies, photovoltaic panels (PV) and electric heat pumps (EHP) are studied for different penetration levels by using a real three-phase four-wire LV network in the North West of England. Profiles of loads, PV and EHP have a granularity of 30 minutes. Energy losses, voltage problems and thermal loading are studied. A Monte Carlo approach is considered in order to cater for the random nature of some parameters such as the location and size of low carbon technologies. Results for the studied LV network clearly indicate that meshed operation can indeed increase its ability to host higher penetrations of PV and EHP. © 2014 IEEE. Source

Wang L.,Northumbria University | Liang D.H.,DNV GL | Crossland A.F.,Durham University | Taylor P.C.,Northumbria University | And 2 more authors.
IEEE Transactions on Smart Grid | Year: 2015

A method for the coordination of multiple battery energy storage systems (BESSs) is proposed for voltage control in low-voltage distribution networks (LVDNs). The main objective of this method is to solve over-voltage problems with multiple suitably sized energy storage systems. The performance of coordinated control is compared with noncoordinated control using both a real-time digital simulator and a MATLAB model of a real U.K. LVDN with a high installed capacity of solar photovoltaics. This is used to show that coordinated control is robust and effective at preventing voltage rise problems in LVDNs. The proposed coordinated control scheme is able to use the BESSs more evenly, and therefore reduces the costs of battery replacement to the storage operator in terms of both number of batteries and maintenance visits. © 2015 IEEE. Source

Williamson G.E.,Parsons Brinckerhoff | Emin Z.,Parsons Brinckerhoff | Povey I.,Electricity North West Ltd
IET Seminar Digest | Year: 2013

Delivery of the UK Government's Carbon Plan [1] to achieve the reduction in emissions required for compliance with the fourth carbon budget [2] will drive an increasing number of non-linear connections onto electrical distribution networks. More photo voltaic generators, heat source pumps and electric vehicle charging points are expected to increase harmonic distortion levels on the LV system. Commissioned by Electricity North West Limited, a simple assessment has been undertaken to determine the likely amount of these harmonic-producing connections to low voltage distribution networks that could be made whilst maintaining harmonic voltage distortion values below the planning levels of Engineering Recommendation G5/4-1 [3]. Using typical system parameters, harmonic voltage distortion values were estimated based on assumed current injections from the new connections and average network background harmonics, calculated from measurements at 50 random LV sites. It was found that the limiting penetration level of low carbon connections was 40% of the distribution substation rating and it is postulated that this could be extrapolated to apply to the entire UK distribution network. Source

Crossland A.,Durham University | Jones D.,Electricity North West Ltd | Wade N.,Durham University
IET Conference Publications | Year: 2013

With the high growth in distributed generation in the UK and resulting challenges in distribution, there is a need for network operators to develop cost based tools to plan for and control technologies such as energy storage. This paper presents three methods for locating storage in LV networks to solve voltage rise problems. The methods are compared and evaluated and it is shown that careful heuristic selection and storage located in homes can provide significant savings for network operators. Source

Crossland A.F.,Durham University | Jones D.,Electricity North West Ltd | Wade N.S.,Newcastle University
International Journal of Electrical Power and Energy Systems | Year: 2014

In light of the expansion of domestic photovoltaic (PV) systems in the UK, there are concerns of voltage rise within LV networks. Consequently, network operators are interested in the costs and benefits of different technologies to manage their assets. This paper examines the particular case for distributed energy storage. A heuristic planning tool is developed using a genetic algorithm with simulated annealing to investigate the problem of locating and sizing energy storage within LV networks. This is applied to investigate the configuration and topologies of storage to solve voltage rise problems as a result of increased penetration of PV. Under a threshold PV penetration, it is shown that distributed storage offers a financially viable alternative to reconductoring the LV network. Further, it is shown that a configuration of single phase storage located within the customer home can solve the voltage problem using less energy than a three phase system located on the street. © 2014 Elsevier Ltd. All rights reserved. Source

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