1,597 research outputs found
A*-based optimal coordination of vehicle-to-grid batteries and renewable generators in a distribution network
No full textThe increasing integration of Electric vehicles (EVs) and renewable generators (RGs) is an inevitable trend in power system development to control the release of greenhouse gases and pollution and reduce dependence on fossil fuels. This will challenge distribution networks, which have constrained capacities, due to the intrinsic intermittence of renewable power and additional charging load demand of EVs. However, appropriate dispatch of EVs via vehicle-to-grid (V2G) operation in coordination with RGs can solve the stability issues and provide operational support for the power grid and benefit both environment and EV users. This paper utilizes the A∗ search procedure for the first time to solve the optimal decentralized coordinated dispatch problem of RGs and EVs, which is formulated as a distributed multi-objective constraint optimisation problem using the Analytic Hierarchy Process. Both power grid and EV users' concerns and priorities are taken into account. The proposed algorithm is tested on a radial distribution network, a modified UK generic distribution system (UKGDS). The simulation results demonstrate the feasibility and stability of the proposed A∗-based optimal coordinated dispatch strategy.</p
Optimal decentralized coordination of electric vehicles and renewable generators in a distribution network using A<sup>∗</sup> search
No full textThe increasing integration of Electric vehicles (EVs) and renewable generators (RGs) is an inevitable trend of power grid concerning the global control of greenhouse gas release. This will challenge constrained distribution networks due to the intrinsic intermittency of renewable power and additional charging load demand of EVs. However, appropriate dispatch of EVs via vehicle-to-grid (V2G) operation in coordination with RGs can solve the stability issues, provide operational support for the power grid, reduce the reliance on fossil fuels and benefit both the environment and EV users. This paper develops a novel algorithm to solve the optimal decentralized coordinated dispatch problem of RGs and EVs based on multi-agent and the A∗ search procedure. This optimal dispatch problem is formulated as a distributed multi-objective constraint optimisation problem using the Analytic Hierarchy Process taking into account both power grid and EV users’ concerns and priorities. The inherent uncertainty of EV driving activities and RG output power are considered in this work, of which the stochastic modelling is established using copulas. The proposed algorithm is tested on a radial distribution network, a modified UK generic distribution system. The simulation results demonstrate the feasibility and stability of the proposed A∗-based optimal coordinated dispatch strategy.</p
Decentralized coordination of distributed generators in a distribution network using A
No full textThe increasing penetration of renewable generators (RGs) in the power grid is an inevitable trend to combat air pollution and reduce the usage of fossil fuels. In a distribution network, the growing erection of distributed small-scale renewable generators poses several challenges for the network operator: constrained capacity and balancing of supply and demand. Therefore, an appropriate approach is required to achieve the optimal dispatch of distributed generators within a distribution network. In this paper, a decentralized agent-based dispatch approach is proposed for the optimal coordination of distributed generators. It is first formulated as a distributed constrained optimization problem and then solved using an A∗-based algorithm. The proposed approach is explained and tested on an example distribution network. A comparison with a published algorithm based on dynamic programming is made to discuss the difference between them and the potential advantages of the proposed A∗-based optimal dispatch algorithm.</p
Global Media Ideas - Infinite Pathways to Creative Succes - Andy Elwood - Part One.mp4
No full textDuring the X Media Lab: Global Media Ideas summit in June 2011, media and technology writer Brad Howarth conducted interviews with industry experts for Creativeinnovation. This video is part one of Brad Howarth's interview with Andy Elwood, Directory of Business Development at Gowalla. Andy Elwood discusses the idea behind the application and how their founder Josh Williams went from inspiration to launching the idea as a business and where they stand in the market today
Global Media Ideas - Infinite Pathways to Creative Succes - Andy Elwood - Part Two.mp4
No full textDuring the X Media Lab: Global Media Ideas summit in June 2011, media and technology writer Brad Howarth conducted interviews with industry experts for Creativeinnovation. This video is part two of Brad Howarth's interview with Andy Elwood, Director of Business Development at Gowalla. Andy Elwood discuss how other companies should be taking advantage of the location platform to create experiences of their brand, not just using the platform as a point of data generation. Elwood also observes that Australian brands and creative companies are well positioned to become market leaders in this platform which is still relatively new world-wide
Marie and Andy Auzin visit the Old Town part of Riga Latvia
No full textMarie and Andy Auzins visit the Old Town part of Riga with cousin Elita Petersone in 19942.1.3 Current Latvian History in Europe (Pre-Post WWII), 2.1.1 Physical Attributes of Latvi
20 x 20 : Twenty Years of Conundrum Press
No full text"To celebrate twenty years in operation he [Andy Brown] asked one author or artist for each year of the press who had a book out that year to contribute something new, something that represented Conundrum. For some it would have been the first book he or she had ever made. So in the end twenty Conundrumites represent twenty years, hence 20×20. There will be digging deep into the archives, there will be memoirs, there will be comics, drawings, and photographs. There will be laughter and tears of joy." -- Publisher's website
Episode 62: Andy Jones: Asking the Right Questions
No full textAndy Jones, B.A. \u2706 is a writer, pastor, and CSP alumnus who lives in the Bay Area. In this interview, he shares about his experiences as a CSP student and staff member, his ministry journey, and how he became a published author. His books bring tremendous theological insights in an accessible and understandable manner
Simulation based life cycle cost modelling as a decision support tool
No full textThis paper summarizes the work that has been carried out as part of the FLAVIIR project, a 5year research program looking at technologies for future unmanned air vehicles. This is a UKEPSRC funded project sponsored by BAE systems. A framework is presented in which a life cyclecost model can be integrated into the design process to facilitate the comparison between differentconfigurations. The architecture to estimate the life cycle cost and the associated models aredescribed. The acquisition costs are estimated using a hierarchical structure and a discretesimulation model is used to estimate the maintenance and operation costs. It is then demonstratedhow the framework can be used to evaluate the cost penalty of different design concepts
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