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The power systems laboratory at the University of Aberdeen has developed new converter topologies that have applications in connecting MW size DC power sources with DC transmission/distribution grids. These converters resolve very challenging questions of fault isolation on high-power DC networks. Scottish Enterprise funded a proof of concept project which developed a prototype, and confirmed the feasibility for various applications with interconnecting renewable power sources. Impact from the research is ongoing. Initial impact has been on public policy and services, where policy debate has been informed by our research evidence; and where decisions, regulations or guidelines have been informed by our research. Impact has also been generated for practitioners and professional services, where both a professional body and a company have used research findings in the conduct of their work, their practices have changed, and new or improved processes have been adopted as a direct result of research findings.
The technology has attracted the attention of George Adamowitsch, European Coordinator for the working group for offshore and onshore grid development. He has described the Aberdeen research in his annual report to EU parliament in 2010, and the lead academic, Professor Dragan Jovcic, now sits on the Working Group for onshore/offshore grid development, developing plans for the European DC supergrid. In addition, this research has contributed to Working Group B4.52 of the International Council on Large Electric Systems (CIGRE), and their major technical brochure "HVDC Grid Feasibility study". Finally, the research has been analysed by the French power company RTE (Réseau de Transport d'Electricité). As a result of the research findings the company has adapted their approach to the planning of major offshore wind farm developments, resulting in a re-definition of the company research and development strategy.
This addresses improvements in the design of hydraulic transmission systems, for vehicular and renewable energy generation systems, by replacing the mechanical gearboxes to reduce their significant energy losses. This ERPE design of novel digitally controlled hydraulic transmission systems has culminated in the licensing, manufacture and production of high efficiency hydraulic gearboxes, now registered as the Digital Displacement® (DD®) patented technology.
This novel technology enabled the formation of the spin-out company Artemis Intelligent Power Ltd., with 30 staff in 2008, which was acquired by Mitsubishi Heavy Industries Ltd., in 2010, enabling the growth to 50 employees today.
Practical Waveform Engineering, developed at Cardiff, is having a major impact on how modern- day microwave power amplifiers are designed, delivering real competitive advantages for global communications companies such as Nokia-Siemens-Networks and M/A-COM.
Economic impact is through reduced time-to-market and lower design costs, leading to high- performance power amplifier products. Examples include $40M revenue and employment of additional staff for M/A-Com, and the successful spin-off company Mesuro Ltd., generating revenue in excess of £2.5M.
Impact on practice is through successful demonstration of new device technologies and amplifier architectures, the introduction of PWE-based CAD models, and most significantly, the introduction of the "Cardiff Model" into mainstream simulation tools.
Environmental Impact is by improving the efficiency of power amplifiers and significantly reducing the carbon contribution of mobile communications systems, translating into savings of approximately £2.5M/year and a 17 kiloton reduction in CO2 emission for a typical EU network.
Research at the University of Strathclyde between 2003 and 2008 directly produced the following impacts from 2008 onwards: 10 wind farms (17 MW aggregate capacity) connected to the Orkney power network from 2009 to 2013 with accompanying economic and environmental benefits; Orkney power network reinforcement deferral saving of £30M from 2009 with repeat deployments of Active Network Management (ANM) technology in other UK power networks; spin-out company formed in September 2008 with total revenues to date of £6.1M, equity investment totalling £3.5M and 35 FTE jobs created; provision of new power system options for long term network plans impacting the 2013 investment decisions in distribution network companies; contribution to the emerging Smart Grid business sector in the UK and overseas from 2008.
Research by the University of Cambridge Department of Engineering (DoEng) on high-reliability micro-inverters for use in solar power systems was commercialised by DoEng spin-out company Enecsys Limited. Since 2008, Enecsys has attracted GBP34M in private investment, increased its number of employees from 7 to 75 people across three offices in Europe, North America and Asia-Pacific, and shipped more than 150,000 micro-inverter units. Its revenue in financial year 2012/13 was USD11.7M. Solar power installers have confirmed that Enecsys' products, in comparison with traditional string inverters, are: easier, cheaper and safer to install; more reliable; and able to extract more energy from an array of solar panels. Enecsys products are also changing the market for solar power with simple plug-in solutions that home owners buy from retailers and install themselves.
Electrical power companies are tasked with operating a highly reliable and robust power system. Electrical power outages (blackouts) have serious consequences for the companies concerned as well as society. The health of electrical insulating materials is critical for the reliability of these systems as it often determines equipment lifetime.
Leicester was the first to demonstrate experimentally that polymer based nanocomposite materials could increase the service life and reliability of electrical insulation as used in high voltage power transmission systems. Its research has also led to the development of measurement techniques to assess the health and the extent of thermal ageing of HV power cables.
National Grid has used Leicester's research findings to manage and monitor its electricity transmission equipment, with resulting impacts on its safety, efficiency and financial economy. Borealis, a major international supplier of insulating materials has used the research to solve manufacturing problems and to set up test facilities for medium voltage cables. A Knowledge Transfer Partnership with Alstom Grid has led to the the establishment of a £1M commercial size HVDC cable test facility which has attracted £0.5M investment from cable manufacturers worldwide.
Newcastle University has a substantial background in researching novel control methods for electric motors. This case study concerns the impact that our work on sensorless control systems has had upon Dyson consumer products.
One of our sensorless control schemes has been adopted by Dyson for their vacuum cleaner drive systems offering benefits of ruggedness, flexibility and being inexpensive to implement, leading to reduced production costs and improved ergonomics derived from the ability to eliminate bulky sensor components and separate control electronics from the motor.
Dyson has invested £5M in a new production line for products using this sensorless control system which have production volumes of around 5 million units per annum. The Company estimates the cost savings accruing from the use of our designs at around £2M per annum.
Prof Irving and Prof Sterling of the Institute of Power Systems at Brunel University collaborated with National Grid (NG) to develop and deploy a Sparse Dual Revised Simplex (SDRS), optimisation engine for real-time power allocation of all generators that were controlled by the NG. Since 2005-6 NG has been using the algorithms to aid in operation of their Balancing Mechanism, which provides a means of adjusting the level of production or consumption of individual generators or demands in the British Electricity Trading and Transmission Arrangements (BETTA). The algorithms enable the Balancing Mechanism (BM) to efficiently adjust outputs of generators in real time in order to balance the demand for electricity at minimum cost. Therefore, providing economic balancing of the transmission system at a scale of 2-3% of the £5bn annual electricity market (approximately £100M-200M per annum), hence about £800 million has been optimally traded in total in the BM since 2008. It is also important to acknowledge the reliability of the algorithms and SDRS optimisation engine from 2006 to present day, as periods of software outage carry high operational costs. The algorithms developed at Brunel continue to have very significant real world impact in terms of financial volume and its reach, such that every transmission scale power generator in the UK participates in the balancing mechanism and by implication every electricity-user benefits.
The supply of electrical energy to centres of demand is an increasingly important issue as our power generation sources decarbonise. Without innovation in our use of high voltage cables, security of supply to our major cities cannot be guaranteed. Our research has:
Innovative research at Strathclyde University, embodied in its spinout Diagnostic Monitoring Systems (DMS) Ltd, has enabled the Glasgow-based company to become the premier supplier of ultra-high frequency (UHF) systems for detecting harmful partial discharge (PD) activity in high-value gas insulated substations and power transformers. Annual sales rose from £6.7M in 2008 to £11M in 2012, and its staff doubled to 56 employees. DMS' equipment is utilised in 27 countries, with total exports over 2008 - 2013 exceeding £45M. A sustained partnership with Strathclyde has yielded new sensor technologies and secured mainstream international recognition for UHF PD detection techniques, which are being incorporated within a new IEC standard. Economic value of Strathclyde's UHF technology was further emphasised in 2009 when DMS was acquired by Qualitrol, part of the US $46B Danaher Corp that owns numerous global engineering brands including Tektronix, Fluke, Leica Microsystems and Gilbarco Veeder-Root.