Ragaa M.,Northern Powergrid |
Jones G.R.,University of Liverpool |
Deakin A.G.,University of Liverpool |
Spencer J.W.,University of Liverpool
Gaodianya Jishu/High Voltage Engineering | Year: 2013
This contribution describes the use of chromatic techniques for quantifying signatures of partial discharges (PD). A brief description of the basis of chromatic monitoring is given along with explanations of how the approach may be applied for addressing signals produced by PDs. Laboratory test data from several sources for different types of PDs, operating conditions and geometries have been subjected to the chromatic procedures. These include a point-plane gap, a sphere in a liquid and treeing in a cable. Chromatic changes in PD signals have been investigated as a function of the amplitude of the alternating voltage producing the PD, the time duration before full electrical breakdown and for different forms of PDs. Results of the chromatic processing of these data are presented in the form of a number of chromatic maps relating to different quarter cycles of the alternating voltage producing the PDs. The results show the potential of the chromatic techniques for indicating the likelihood of full electrical breakdown and for distinguishing between certain forms of PDs. A summary of the chromatic processing procedures is presented for producing chromatic maps and for adaptation in further exploring PD signal features.
Dent C.J.,Durham University |
Hernandez-Ortiz A.,Durham University |
Blake S.R.,Newcastle University |
Miller D.,Northern Powergrid |
Roberts D.,EA Technology Ltd
IEEE Transactions on Power Systems | Year: 2015
Installed capacities of distributed generation (DG) are projected to increase substantially in Great Britain and many other power systems. This paper will discuss the definition of capacity value of DG arising from its ability to support additional demand without the need for new network capacity, in analogy with the definition of effective load carrying capability (ELCC) at transmission level. This calculated ELCC depends on the precise detail of its definition; in particular in a demand group fed by a pair of circuits where the double outage state dominates the calculated reliability index, the ELCC will be very small unless the generator can run in islanded mode. Finally, requirements for use in practical planning studies and development of formal planning standards will be discussed. © 1969-2012 IEEE.
Blake S.,Durham University |
Taylor P.,Durham University |
Miller D.,Northern Powergrid
Smart Innovation, Systems and Technologies | Year: 2013
Northern Powergrid are responsible for the distribution of electrical energy to 3.8 million customers in the North East of England, Yorkshire and North Lincolnshire. They are accountable to the industry regulator OFGEM, in particular for the level of network risk, as measured by the frequency and duration of interruptions of supply to customers. Durham University has extensive experience of research into Power Systems, and of working with the electricity distribution industry both in the UK and overseas. © Springer-Verlag Berlin Heidelberg 2013.
Lyons P.F.,Northumbria University |
Wade N.S.,Northumbria University |
Jiang T.,Northumbria University |
Taylor P.C.,Northumbria University |
And 3 more authors.
Applied Energy | Year: 2015
The UK government's CO2 emissions targets will require electrification of much of the country's infrastructure with low carbon technologies such as photovoltaic panels, electric vehicles and heat pumps. The large scale proliferation of these technologies will necessitate major changes to the planning and operation of distribution networks. Distribution network operators are trialling electrical energy storage (EES) across their networks to increase their understanding of the contribution that it can make to enable the expected paradigm shift in generation and consumption of electricity.In order to evaluate a range of applications for EES, including voltage control and power flow management, installations have taken place at various distribution network locations and voltage levels. This article reports on trial design approaches and their application to a UK trial of an EES system to ensure broad applicability of the results. Results from these trials of an EES system, low carbon technologies and trial distribution networks are used to develop validated power system models. These models are used to evaluate, using a formalised methodology, the impact that EES could have on the design and operation of future distribution networks. © 2014 Elsevier Ltd.
News Article | November 9, 2015
Warren Buffett wants to tell you the best time to wash your clothes. Or at least his energy company in the U.K does. Buffett’s Northern Powergrid Holdings Co. is working with Siemens AG to test a so-called smart grid that has the ability to control when consumer appliances will be used in the home.