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This paper presents a control strategy to enhance the performance characteristics of a stand-alone wind-driven Permanent Magnet Synchronous Generator (PMSG) under different operating conditions. The presented control strategy aims at regulating the load voltage, in terms of magnitude and frequency and extracting the maximum wind-power under both constant wind-speed and variable wind-speed including...
This paper analyses the performance and control characteristics of a stand-alone wind-generating system based on Permanent Magnet Synchronous Generator (PMSG). The presented wind generating-system consists of a wind turbine, PMSG, uncontrolled rectifier, DC-DC boost converter and voltage source inverter. A simple control strategy is presented in order to supply the load with a constant voltage and...
This paper proposes a vector-control technique of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG) for maximum wind-power extraction under two strategies summarized as; unity power-factor operation and minimum converter-current. The adopted generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid...
This paper presents a control strategy for power management with maximum power extraction of a stand-alone wind-driven Permanent Magnet Synchronous Generator (PMSG). The main objective of the presented control strategy is to manage the generated wind-power between the load and the employed battery-bank in addition to extract the maximum wind-power and supply the load with a constant voltage and frequency...
This paper presents a sensorless scalar volt per hertz (v/f) control technique for maximum power tracking of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG). The proposed generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. The capability of the proposed...
This paper presents a control strategy for a standalone wind-energy conversion system using Permanent Magnet Synchronous Generator (PMSG). The presented control strategy aims at regulating the load voltage in terms of magnitude and frequency under different operating conditions including windspeed variation, load variation and the unbalanced conditions. The wind generating-system under study consists...
This paper proposes a vector-control (power-winding flux orientation) strategy for maximum wind-power extraction of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG) system. The adopted generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. In addition, a unity...
This paper presents a simple carrier-based PWM (CBPWM) technique to control a three-phase to five-phase matrix converter (3×5 MC). The proposed technique is based on the indirect configuration of the matrix converter in which the three to five-phase matrix converter is modeled as three-phase rectifier followed by a five-phase inverter. With this representation, CBPWM technique is suggested to control...
This paper presents a scalar volt per hertz (v/f) control technique for maximum power tracking of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG). The proposed generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. The presented control technique is based...
This paper develops indirect space vector modulation technique for a three- to nine-phase matrix converter. The proposed technique is based on the double-stage configuration in which the matrix converter is modeled as three-phase rectifier followed by a nine-phase inverter. Both rectifier and inverter stages are controlled using space-vector modulation technique. In the rectifier stage, the modulation...
This paper summarizes a study of the effect of cross-linking processes and by-products of cross-linking on electrochemical tree growth in polyethylene insulated cables. The investigations dealt with cables cross-linked by radiation and chemically by peroxides. The test program also included thermoplastic polyethylene insulation containing acetophenone as an additive. Results indicate that the decomposition...
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