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In large-scale natural disasters, humans are likely to fail when they attempt to reach high-risk sites or act in search and rescue operations. Robots, however, outdo their counterparts in surviving the hazards and handling the search and rescue missions due to their multiple and diverse sensing and actuation capabilities. The dynamic formation of optimal coalition of these heterogeneous robots for...
Early and intensive physical therapy can improve upper arm and hand functionality for stroke survivors. Virtual reality systems that utilize state-of-art natural user interface tracking sensors and adaptive user profiling software has the potential to supplement traditional physiotherapy and engage patients to sustain beneficial quantity and quality of rehabilitation. In this paper we provide an overview...
This demo will show the key features of a Platform as-a-Service (PaaS) we have proposed in a research paper accepted for presentation at IEEE LANMAN 2016 conference. The proposed PaaS enables IoT applications provisioning in hybrid cloud/fog environments. Two goals are assigned to the demo. On the one hand, we will highlight how IoT applications can be provisioned in such environments. On the other...
Fog computing brings cloud close to end-users and data sources by enabling computation and storage at the edges of the network. An application can have some of its components running in a “distant” cloud and interacting with the other components running in the fog, closer to end-users and data sources such as wireless sensors. Low latency is the main benefit. Applications spanning cloud and fog, such...
Internet of Things (IoT) is expected to enable a myriad of end-user applications by interconnecting physical objects. Cloud computing is a promising paradigm for provisioning IoT end-user applications in a cost-efficient manner. IoT end-user applications are provisioned in cloud settings using PaaS and offered as SaaS. This paper focuses on the PaaS aspects of IoT end-user applications provisioning...
Wound rotor synchronous generators are widely used for diesel-generating sets (gen-sets) and wind power generation. For the former, they are designed for operation at only one speed and their operating conditions are dictated by the load. The gen-sets are a standard power supply in islanded power systems as a back-up power supply in remote locations [1]-[3]. For the latter, the wind turbine needs...
This paper presents a new technique for the detection of islanding conditions in electrical power systems. This problem is especially prevalent in systems with significant penetrations of distributed renewable generation. The proposed technique is based on the application of principal component analysis (PCA) to data sets of wide-area frequency measurements, recorded by phasor measurement units. The...
Activity recognition is used in a wide range of applications including healthcare and security. In a smart environment activity recognition can be used to monitor and support the activities of a user. There have been a range of methods used in activity recognition including sensor-based approaches, vision-based approaches and ontological approaches. This paper presents a novel approach to activity...
The paper presents a methodology for managing a network's voltage profile by dispatching grid-connected distributed generation (DG). The coordinated voltage control algorithm has two main stages for controlling network voltages. Firstly, it avails of any available network reactive power assets and reactive power available from DG which is dispatched to coincide with network needs. If insufficent reactive...
The recent years have seen an increase in the implementation of Wireless Sensor Networks (WSNs) in various monitoring and management applications. Deployment of a WSN for critical management or monitoring applications in locations with poor accessibility requires the WSN to be autonomous and sustainable. In this paper, a framework based state implementation within the sensor node is discussed that...
Two case studies are presented in this paper to demonstrate the impact of different power system operation conditions on the power oscillation frequency modes in the Irish power system. A simplified 2 area equivalent of the Irish power system has been used in this paper, where area 1 represents the Republic of Ireland power system and area 2 represents the Northern Ireland power system. The potential...
This paper examines the growing issue of voltage management of medium-voltage (MV) distribution networks. These networks, especially in rural areas, often host a growing capacity of renewable generation, in particular wind turbine generators (WTGs). Wind generation in general causes voltage to rise. Such are the exacting voltage control requirements that distribution networks are vulnerable to the...
This paper focuses on the use of flexible loads for providing emergency reserve to manage wind variability for a weakly interconnected power system. Ramping restrictions and starting costs of existing reserve facilities prompt research work on reserve from load. Flexible loads can be switched off quickly during under-frequency transients to maintain stable frequency and operation of the power system...
Due to the deregulation of the power supply industry and the continuing need for network expansion, there is pressure to maximize utilization of the existing transmission and distribution networks. Compared to the traditional static line rating, a dynamic line rating identifies the ampacity in real time according to the measured weather conditions, taking the wind cooling effect into account that...
The use of Voltage Source Converter (VSC) based HVDC transmission has been strongly suggested for the interconnection of various power networks. However, VSCs susceptibility to DC faults, particularly the potential damage caused to the converter IGBTs due to overcurrent, is an issue that must be addressed. This paper analyses the behaviour of a VSC-based HVDC system under varying DC fault conditions...
Electrical energy networks are increasingly making use of Information Technology to enhance the way in which the electricity delivery infrastructure operates. A ‘Smart Grid’ can be understood as an electrical network which uses applications that are somehow dependent on the exchange of information to enhance its operation. This paper evaluates telecommunications delivery technologies that are appropriate...
This paper presents a method of improving anti-islanding detection for distributed generation by application of a wide-area measurement system. Present anti-islanding solutions were developed when installed capacity of distributed generation was low. Issues such as nuisance tripping, cascade tripping and poor anti-islanding detection sensitivity common with present solutions could be justified since...
Reactive power control is an important control issue for distribution system operators due to increased penetration of distributed generation. The work presented in this paper utilizes the inherent reactive power capability of the doubly-fed induction generator (DFIG) based wind farms to optimize the system losses while considering the network constraints in the system. The IEEE-30 bus system was...
The continued development of high power wind turbines raises the standards of operation requirement. This paper evaluates the ability of an energy storage device with a bidirectional dc-dc converter connected to the dc link of a direct driven wind turbine for output power smoothing and fault ride through enhancement. Method based on simple dc voltage measurement and coordinated dc voltage loops of...
Heat pumps are vitally important for achieving low carbon and renewable energy targets. There is a rapid increase in heat pump installations in the UK and Europe in the last few years for their supporting role towards green energy and demand-side management. The increase in heat pump installation prompts research work on the impact of high penetration of heat pumps on the low voltage network. This...
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