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This article, firstly, introduced the operating principle of variable speed constant frequency (VSCF) wind power generation based on a structure of dual PWM converter. Then the mathematical model of network-side and rotor-side converter was set up. Decoupling control and vector control technique were presented based on grid voltage orientation and stator flux orientation to simplify the control strategy...
It is proposed in this paper a methodology to obtain optimal controllers gains for the rotor-side converter of doubly fed induction generators (DFIGs) using a genetic algorithm approach. The main objective is to enhance the operational security and robustness of the power system, by a more effective contribution of the DFIG controllers to the system controllability. To reach this goal, the crow-bar...
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...
This paper presents the analysis and operation of doubly fed induction generator (DFIG)-based wind power generation system under unbalanced network voltage conditions. The limited voltage and current ratings, the control capabilities of both the grid-side and the rotor-side converter (GSC & RSC) for unbalanced network voltage compensation are investigated in detail. A new current control scheme,...
One position controlling source using sinusoidal wave by CPLD through linear amplifier technique for driving ring-type traveling-wave ultrasonic motor with 30 mm diameter of the stator (RTWUSM30) has been proposed and designed in this paper. The driving and controlling signals can be adjusted the frequency, the phase, the amplitude, and the phase difference of the two sin wave exciting signals through...
Since variable-speed generation has a higher energy capturing and converting efficiency than the fixed-speed system, new proposals for wind power system utilize variable-speed generators are introduced, among which permanent-magnet synchronous generator(PMSG) is an attractive choice. This paper describes a sensorless vector control strategy for a direct-driven PMSG, which is connected to the power...
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