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This paper develops a data-based hybrid driven control (DHDC) approach for a class of networked nonlinear systems compromising delays, packet dropouts and disturbances. First, the delays and/or packet dropouts are detected and updated online using a network problem detector. Second, a single-variable first-order proportional-integral (PI)-based adaptive grey model is designed to predict in a near...
Energy Storage Systems (ESS) can offer a combination of services to transmission and distribution network operators and energy suppliers. In order to do this effectively, the power and energy resources of the energy storage system must be allocated ahead of time, and account for uncertainty in service delivery. This paper presents a method for scheduling these resources, which accounts for the limited...
In this paper, we use data mining techniques and formulate suitable assessment metrics to derive estimates of the State of Health (SOH) of stand-alone solar home systems. Data is provided from a company with significant numbers of such systems in Africa. The systems in question contain a PV panel, lead-acid battery and a series of DC loads. Data mining allows us to not only estimate the SOH of the...
Electricity demand disaggregation describes the identification of appliance level loads from aggregate power measurements. This topic is widely researched, but the majority of projects focus on grid connected customers with strong connections and many loads; however, there are numerous applications for disaggregation in the intelligent, off-grid systems emerging in developing countries. In this paper,...
The paper introduces the benchmarking of multivariable systems using an offline optimal LQG approach. Polynomial system optimal LQG control theory is used to derive a solution to the multivariable restricted structure controller computation. This solution theory is then developed into an computational algorithm. The control problems of the hotstrip finishing mill interstand looper as found in the...
This paper describes how new benchmarking concepts can be applied to different aspects of process control performance assessment. Three general levels of benchmarking concepts for process and industrial control applications are introduced and defined: economic process, technical process and control loop benchmarking. The concepts of technical process and control loop benchmarking are demonstrated...
Real-Time Thermal Ratings (RTTR) has a natural synergy with wind generation, since during periods of high local wind speed increased wind farm output coincides with uplifted line ratings. This paper describes a network planning study on a real section of UK distribution network. The study considers a branch of 132kV network connecting several wind farms to the grid. By assessing the local wind conditions...
Society is challenging systems engineers by demanding ever more complex and integrated systems. With the rise of cloud computing and systems-of-systems (including cyber-physical systems) we are entering an era where mission critical services and applications will be dependent upon ‘coalitions-of-systems’. Coalitions-of-systems (CoS) are a class of system similar to systems-of-systems but they differ...
With the rise of cloud computing and system-of-systems we are entering an era where mission critical services and applications will be dependent upon ‘coalitions-of-systems’. Coalitions-of-systems (CoS) are a class of system similar to systems-of-systems but they differ in that they interact to further overlapping self-interests rather than an overarching mission. Assessing the sociotechnical dependability...
This case study illustrates the potential benefits and risks associated with the migration of an IT system in the oil & gas industry from an in-house data center to Amazon EC2 from a broad variety of stakeholder perspectives across the enterprise, thus transcending the typical, yet narrow, financial and technical analysis offered by providers. Our results show that the system infrastructure in...
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