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Today micro wind turbines are the most widely used type of wind turbine. The use of rotor tip-fan for enhancing both power conversion as well as low wind speed operation of wind turbines is investigated. It is proposed that tip-fans operating in the tangential directions create a tangential force that enhances the rotor thrust. Experiments were carried out in New Mexico State University wind tunnel...
This paper looks at the significance of bi-directional communication in the Smart Grid and the customer driven microgrid, a basic building block of the smart grid. It presents a classification model of communication requirements from the top down and bottom up perspective. Ultimately this paper presents future areas of work for microgrid operation that can be facilitated by a protocol specifically...
The use of rotor tip-fans for enhancing both power conversion as well as low wind speed operation of wind turbines is investigated. It is proposed that tip-fans operating in the tangential directions create a tangential force that enhances the lift force due to wind. Experiments are carried out in a wind tunnel to investigate the effect of tip-fans on the turbine performance. Furthermore, initial...
This paper describes the simulation of a 34 kV feeder from Pacific Gas and Electric (PG&E)'s distribution network. This feeder has a problem of being disconnected due to relay operation at the time of energization. A simulation model is created using PSCAD/EMTDC®, and validated using the test results provided by PG&E. Based on the simulations, some observations about the phenomenon are made...
A hardware implementation of a completely decentralized multi-agent system for capacity discovery in micro-grids is presented. Performance in terms of time-to-convergence of the decentralized system, using wireless communications is reported. An Arduino microcontroller and ZigBee radio are used to implement the algorithm.
In this paper, the potential of a completely decentralized multi-agent based control architecture is explored for the identification of viable islands in a customer-driven micro-grid prior to a fault or disturbance. The agents follow a set of rules and determine the prospective islands, in case a fault results in the opening of sub-station breaker, by communicating only with their immediate neighbors...
Fundamental-frequency impedance measurements conducted on a single-phase distribution feeder suggest that conventional methods of calculating line-impedance can lead to gross errors. These errors are shown to be due to lack of adequate modeling of the current division between earth and neutral as determined by neutral grounding. Models that include the effects of self-and mutual-impedances, pole-ground...
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