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This paper describes the design, modeling and development of a novel Airborne Wind Energy system (the EAGLE System), designed to handle a 2.5 kW, 25 kW or 100 kW aloft generator at varying altitudes. The system combines a hybrid tethered lighter-than-air and aerodynamic lift based flyer supporting a counter-rotating wind power generator payload, and a nonlinear-robust MIMO control system, with longitudinal...
The control of mechanical power in wind turbogenerators involves the participation of many subsystems. One of them is related to pitch mechanism, which usually employs conventional PI strategies. This paper presents an alternative for estimating the parameters of this PI controller, using Fuzzy Logic (FL). Matlab-Simulink™ software was used in order to verify the performance of the FL-based parameter...
With the rising penetration of wind power into electric power systems, more accurate and comprehensive studies are required to identify the interaction between wind farm(s) and power system. This requires accurate models of different types of wind turbine-generators. This paper describes modeling and small signal analysis of a grid connected fixed speed wind turbine generator (FSWTG). A complete model...
In this paper we develop a model of combined heat and power (CHP) dispatch for the system consisting of both thermal generators and wind turbines. In this model, the probability of stochastic wind power is included in the constraint set. This approach avoids the probabilistic infeasibility caused by using the average of random variables. The effects of wind speed on the generated power are investigated...
This paper presents a hybrid renewable energy system integrating a small wind turbine, photovoltaic panel coupled to a permanent exchange membrane fuel cell (PEMFC). The interconnection of the fuel cell with finite power source is going to improve the energizing performances of the system by solving the problems of fluctuation of renewable wind and photovoltaic powers sources.
Recent advancements in size and technology of wind turbines require sophisticated control systems to effectively optimize energy conversion and enhance grid integration. This article investigates output power stability of a WECS in a highly fluctuating wind environment. The aim is advanced controls development to identify and assess the critical loads and instabilities, and improve the dynamic response...
This paper investigates the control and operation of doubly fed induction generator (DFIG)-based wind generation systems under unbalanced voltage conditions. DFIG system behaviors under unbalanced voltage are analyzed and different control targets are discussed. A new rotor current control strategy containing a main controller and an auxiliary controller is proposed. The main controller is implemented...
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