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A hybrid predictive control strategy is proposed which can efficiently deal with the speed regulation control of permanent magnet synchronous generator (PMSG) in wind-energy conversion system. A single linear MPC controller is designed with a simpler linearization model. Model predictive controller generates control voltages which are iuput into PWM controller. Thus PMSG can be controlled by three-phase...
The recent makeshift in fuel choice, renewable energy sources has been considered as the most popular form of its kind because of its environment friendly approaches, less cost tariff policy and the natural fuel abundance. This inclusion in power system promotes Micro-grid system to optimize the overall distribution. FPGA, elaborated as Field Programmable Gate Array, proposes chances for enhanced...
At present, the parallel back-to-back PWM converters which adopt the parallel mode of sharing DC bus are used in megawatt-level high-power wind generation system. However, there will be circular current when the switch states of two parallel converters are not the same and this circular current will increase system wastage and decrease system efficiency. This paper adopts a novel control strategy...
In this paper, an averaged model of circulating current is proposed. Based on the model, the mechanism concerned with the circulating current occurring are explained explicitly. Owing to the circulating current which mainly consists of zero-sequence components varies with different factors such as pulse width-modulation strategies, circuit parameters and so on, therefore a new control variable associated...
In this paper, On the basis of analyzing the model of three-phase PWM rectifier for wind power grid-connected inverter, the mathematical model of the vector decoupling controlled PWM rectifier at three-phase synchronous rotating coordinate system is deduced. This paper proposes a novel vector decoupling control strategy, which consists of two control loop, i.e. outer voltage loop and inner current...
In wind power generation system the grid-connected inverter is essential device for energy conversion and transmission, of which the performance has a direct influence on the entire wind power generation system. The inductance of AC side affects the static and dynamic performance of the whole system when the grid-connected inverter is actively inverting. So the design of inductance of AC side is essential...
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