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A different topology for brushless doubly-fed induction generators is presented. A power conditioning system is mounted onto two coaxially connected wound rotors. Carbon brushes and slip rings are replaced by the wound rotors and the rotor-mounted power condition system, which bi-directionally exchanges power to the grid with appropriate amplitude and phase difference between the voltages applied...
This paper presents an improvement technique for the power quality of the electrical part of a wind generation system with a self-excited induction generator (SEIG) which aims to optimize the utilization of wind power injected into weak grids. To realize this goal, an uncontrolled rectifier-digitally controlled inverter system is proposed. The advantage of the proposed system is its simplicity due...
Self-excited induction generators (SEIGs) have a significant potential for application in small scale wind energy generation systems due to their robustness, lower cost and lower maintenance requirements. This type of generator is often incorporated with variable speed wind turbines where maximum power extraction is possible. In such applications, SEIG is intensively used with full-sized converter...
This paper proposes a hybrid AC/DC micro-grid which consists of an AC grid and a DC grid and operates in both grid-tied and autonomous mode. Wind turbine generators (WTGs), diesel generators (DGs) and conventional AC loads are connected to the AC grid whereas photovoltaic arrays with boost converter (PVBC), fuel cell generators and DC loads are tied to the DC grid. AC bus and DC bus are coupled through...
The recent development of power electronic technology encourages to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or permanent magnet synchronous generator (PMSG) for wind power generation. Among those, stability analysis of DFIG type of VSWT has already been reported in many literatures. On the other hand, stability...
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