The wind energy conversion systems when operate in weak grid or in isolated mode may cause power quality problems due to variation in wind speed and other circuit conditions. To improve the power quality of wind generation system a wind-diesel hybrid system is proposed in this paper. The power quality of the system is improved by controlling the excitation and input power of the synchronous gen...

As renewable energy increasingly penetrates into power grid systems, new challenges arise for system operators to keep the systems reliable under uncertain circumstances, while ensuring high utilization of renewable energy. This paper presents unit commitment (UC) which takes into account the volatility of wind power generation. The UC problem is solved with the forecasted intermittent wind pow...

The recent interest in alternative and renewable energy systems results in increased installed capacity ratio of such systems in total energy production of the world. Specifically, Wind Energy Conversion Systems (WECS) draw significant attention among possible alternative energy options, recently. On the contrary of the positive points of penetrating WECS in all over the world in terms of envir...

In off-grid wind energy systems batteries often undergo frequent charge discharge cycles, which reduce battery service life. In addition, due to motor start and other high ‘inrush current’ loads batteries can also undergo high rates of discharge which also degrade battery life. In this paper, a superconducting magnetic energy storage and battery hybrid energy storage system is proposed which is...

-This paper introduces an optimisation model that may be used for planning wind turbine installations over a global energy scenario. The model follows from the observation that, in most practical cases, installations may have to be made under space constraints, and that this may limit the overall energy output per unit land area. In such cases, it may be wise to install wind turbines of large r...