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The generation of electricity based in the renewable energy sources has becoming a more significant in the last years because of continues increase on energy demand and fossil oil energy dependence, additional to preoccupation of environmental. Wind and PV power systems to generate electricity in The Republic of Cape Verde are analyzed in this paper. The power electronics converters and electrical...
A real wind power generation system is given in this paper. SVM control strategy and vector control is applied for generator side converter and doubly fed induction generator respectively. First the mathematical models of the wind turbine rotor, drive train, generator side converter are described. Then the control strategy of generator side converter system is given in detail. Finally the simulation...
This paper explores the performance of alternative voltage control strategy applied to direct drive synchronous wind generators, more specifically with permanent magnetic (PMSG). The reactive power control of the grid-side converter is investigated for voltage control purposes. In Brazil, the Grid National Operator (ONS) requires that wind turbines stay connected to the grid during voltage dips, but...
Energy harvesting devices which convert ambient energy to electrical energy has attracted a lot of attention in commercial sectors. Due to the environmental consciousness, energy harvesting devices or so called micro generators promise a cleaner environment by avoiding the usage of batteries. Piezoelectric energy harvesters are the most promising solution because they can efficiently convert mechanical...
This paper deals with an application of the power balance theory in a voltage and frequency controller (VFC) of an autonomous wind power generation using an isolated asynchronous generator (IAG) feeding three-phase four wire loads. The reference generator currents are estimated using the power balance theory to control the voltage and frequency of IAG system. Three-leg voltage source converter (VSC)...
This paper presented a system of Aircraft Power Distribution System (APDS). Large-signal models of synchronous generator, three phase boost converter and inverter was developed. A two-port network interconnection rule was chose as a special convention about voltage and current variable of component exchange, and a system level model of APDS was performed. The system model was designed to assessment...
This paper presents a marine generator control system which BDFM control winding side is controlled by commercial converter. Two problems of the commercial converter in control system is solved. One is the common commercial converterpsilas output voltage and frequency at constant V/F curve, the other is it canpsilat feedback energy to AC power. Based on generator voltage and frequency loop , we discuss...
The current confluence of energy needs, enhanced environmental awareness and technical developments has led vigorous global efforts toward making wind power a key component of renewable and sustainable energy resources. The conventional wind generators are induction machine types having small and limited wind power production and high cost per unit. Large wind plants involving interior permanent magnet...
In this paper, the control method of extracting maximum power from the seaflow energy is proposed. This paper describes a variable speed seaflow generation system consisted on permanent magnet synchronous motor, bridge rectifier, boost converter and Fuzzy controller. In this proposed seaflow generation system, the duty ratio of boost converter is controlled by the fuzzy controller. An advantage of...
The objective of this paper is to compare the permanent magnet synchronous generator (PMSG) systems for wind turbines with the different drive trains and power ratings by design optimization. The comparison is mainly based on the cost and annual energy production (AEP) for a given wind climate. Firstly, the analytical models of the wind turbine, the 1-stage and 3-stage gearbox, the 3-phase radial-flux...
Permanent magnet synchronous generation (PMSG) has been more and more used in the wind power generation system due to its advantage of simpler structure, higher generation efficiency and more reliable operation. However, the behavior of wind power system during grid disturbances becomes more important with an increasing amount of wind energy installed. Nowadays the grid code demands that the wind...
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