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This paper presents the steady-state performances of a self-excited induction generator under unbalanced conditions. Particular interest was given to an extreme unbalance condition where a three-phase induction generator is supplying a single-phase load. The computation approach used simplifies the mathematical equations governing the operation of the generator. The adopted model for the generator-load...
Power electronic grid-connected converter topologies are widely used as grid interface to interconnect several renewable energy sources under the concept of distributed generation systems. These converters must ensure an active and reactive flux control, minimize the current and voltage harmonic distortions and perform a proper synchronization with the electrical grid. This paper presents an analysis...
Short circuit and ground failures that are quite common in power transmission lines are investigated. These failures are designed considering a system that is supplied by this wind system, analysis are interpreted. In the study, a system is set up and it is fed by the wind turbine. Furthermore, the mathematical model of wind turbine and generator is prepared and the results obtained from the simulation...
Wind is uncontrolled and non-deterministic and causes unexpected variations in wind power and power generation in wind energy conversion systems. The drive train subjected to a varying wind power develops transients at various levels owing to interaction among the mechanical and electrical variables with non-linear characteristics. A transient performance analysis has been carried out showing the...
Wind energy schemes have the potential to substantially reduce the consumption of fossil fuels used in the production of electric energy. The self-excited induction generator has found renewed interest as a low maintenance wind generator for standalone and grid integrated applications. This paper will present a full analytical model of the dynamic response and steady state operation of the induction...
Recently, the grid codes require taking into account the reactive power of the wind farm in order to contribute to the network stability during grid fault, thus operating the wind farm as active compensator devices. This paper presents a comparative study of stabilizing a wind farm with variable speed wind turbine generator system that use doubly fed induction generator (DFIG) as the wind generator...
Responding to more demand in coming years, the task of the small wind energy industry requires progress on several fronts-from public policy initiatives, to technology development, to market growth. Enhanced technologies such as contra-rotating blades, transmission systems, lubrication, airfoils, generators, and power electronics will lower cost and increase energy production. This paper mainly considers...
This paper presents an analysis of a high-performance model reference adaptive system (MRAS) observer for the sensorless control of a induction generator (IG). The sensorless control is based on a model reference adaptive system observer for estimating the rotational speed. The proposed output maximization control is achieved without mechanical sensors such as wind speed or position sensor, and the...
In this study, a novel sinusoidal PWM Switched Power Filter (SPF) and Dynamic Voltage Compensation (DVC) scheme using VSC/SMC/B-B controller for power mitigation and quality enhancements in medium power distribution systems are simulated. The system is based upon a stand-alone Wind Energy Conversion Scheme (WECS) using an induction generator and the proposed system control mechanisms, which are digitally...
In this paper, the low voltage ride-through (LVRT) capabilities of an hybrid wind plant is studied. The hybrid wind plant considered combines fixed speed wind turbines (FSWTs) based on classical induction generator and full power converter variable speed wind turbines (VSWTs) with permanent magnet generator. However, it must be able to respect grid code requirements. A specific control of the variable...
This paper deals with the impact of wind induction generators connected to weak distribution grids. The study presented in this paper, starting from the definition of a model regarding the wind speed, wants to evaluate the impact of the wind turbine connected to weak distribution grids. The main characteristic of the wind model is its simplicity in spite of the number of phenomena that can be simulated...
A novel sinusoidal PWM switched power filter (SPF) and dynamic voltage compensation (DVC) scheme is studied in this work. A real time dynamic voltage, power and generator velocity error tracking based fuzzy logic controller (FLC) is used to stabilize the stand alone wind energy conversion scheme (WECS) comprising an induction generator. The novel dynamic error driven FLC controlled scheme serves as...
This paper concerns the design and practical application of the multipolar induction generator which can be applied to small power directly driven wind generators (1 - 30 kW). All the windings of this generator are placed on the stator. The overturned rotor is tooth-like without windings on it. The stator is placed inside the rotor. This construction helps to reduce the weight of the generator for...
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