Permanent Magnet machines are great candidates to be chosen as the preferred option in many renewable energy applications, where the energy source acts generally in a low speed way over the energy converter. Technological advances in the last decade have meant that permanent magnets are being...

The increasing penetration of electricity generation from renewable energy is posing new technical challenges to the operation of power systems. Some of them are related to the different electrical behavior of the generators when compared with traditional directly coupled synchronous generators....

The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, a fuzzy logic based supervisor is proposed...

Wind energy is a growing renewable energy because of its several advantages; this has changed dramatically with more wind energy penetrating the conventional power network. The influence of wind generators on the power quality is becoming an important issue; non-uniform power production causes...

The increasing penetration of wind energy into power systems has pushed grid operators to set new requirements for this kind of generating plants in order to keep acceptable and reliable operation of the system. In addition to the low voltage ride through capability, wind farms are required to...

Electricity generation from wind has grown sharply and its growth potential is still significant. However, the decentralized nature of the wind opposes the historically centralized structure of national networks. Unlike conventional sources, wind does not provide reactive power, which is...

A nonlinear piezoelectric rotary transducer is developed that makes compact low speed wind generators realizable. Compact wind generators provide power to sensor nodes in remote or hard to reach locations. Since the locations of the sensor nodes are not optimized in terms of wind speed, the...

In recent time, the concern for grid integration of wind power has been a subject of discussion in the academic community. At present, the penetration level is still moderate for most grids to accommodate. As the penetration level increases, wind power may cause additional problems to the grid...