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A wind farm usually consists of a large number of wind turbine generators (WTGs) connected through an internal electrical network and operating simultaneously. In order to study the impact of a wind farm on the dynamics of the power system, a major issue is to develop adequate equivalent models that allow characterizing the dynamics of all individual WTGs. In this sense, with the advance of power...
This paper presents a novel Adaptive Network-Based Fuzzy Inference System(ANFIS) for the optimal control of permanent magnet synchronous generator (PMSG) to extract maximum power without the need of speed & position sensors or any complex estimating algorithm. The control algorithm determines the optimal value of torque controlling current component as a function of change in output power. The...
The paper presents a control strategy for a wind energy conversion system (WECS) for an optimal extraction of power from the wind. The topology of the system consists of a permanent magnet synchronous generator (PMSG), a diode bridge rectifier, a hybrid dc-dc converter which lowers the dc voltage, a supercapacitor and an inverter. However, the grid side inverter is not subject to this paper research...
Microturbine generator system is one of the most promising distributed generation systems because it is small, efficient and mobile. When it is running, the high-frequency alternating current of permanent magnet synchronous generator generating must be rectified and inverted into 50Hz AC to meet the user requirements. Normally, the diode rectifier is used. When we need to regulate voltage, the DC/DC...
Firstly, the limitation of using simplified model to design thermal generating unit controller is discussed. For the simplified model, the dynamic of the synchronous generator is neglected, and thus it is not valid in the emergency state of power systems. Secondly, the integral model of thermal generating unit is constructed, which consists of the models of boiler, turbine and synchronous generator...
The recent trend of wind power generator is to use variable speed wind turbines coupled with Direct Driven Permanent Magnet (DDPM) Synchronous Generators. This configuration offers a considerable flexibility in design and operation, as the output of the generator is delivered to the grid through a fully controlled frequency converter. In this paper, a new control strategy for this generation unit...
This paper focuses on normal operation control of permanent magnet synchronous wind power generator system. It presents the system model theory and the operation control strategy under all the detailed information, such as reference direction of variables. Then a simulation for the normal operation of PMSG system is carried out in PSCAD with the desired results obtained.
Using a boost chopper to implement the maximum power point tracking (MPPT) for a PMSG-based small-scale wind turbine is described in this paper. By analyzing the characteristics of the boost chopper, the optimal duty ratio was theoretically determined by the equivalent resistance of the load. Then the duty ratio was used as a reference instruction to control the output power of the permanent magnet...
Back to back full-size PWM converter is widely used in direct drive wind power system (DDWPS). It is the most cost-effective converter topology verified in field application. The characteristics of back to back full-size converter of DDWPS based on permanent magnetic synchronous generator (PMSG) are researched on in detail through a precise simulation and an experiment. The control strategy is given...
Electric utility deregulation has made it possible for power producers and suppliers (PPSs) to enter the electricity market in Japan. PPSs are supposed to achieve 30-minute balancing control for stable supply of electrical power, in which energy demand and energy supply should be matched within thirty minutes. Meanwhile, load rejection and instantaneous voltage drop greatly affect turbine shafting,...
In the future, with the high penetration level of the distributed generation, their decoupling from network during the fault will eventually cause critical consequences. In order to avoid such situation, it is necessary to perform the transient stability analysis. The paper investigates the hybrid methods for fast transient stability assessment which are able to detect quickly the loss of stability...
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