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More and more small-scale wind generators are being connected to distribution systems. Higher degree of penetration of wind generators can significantly change many operating characteristics of the system including voltage profile and hence voltage stability. This paper proposes a straightforward method of static voltage stability assessment of a radial distribution system with fixed-speed wind generators...
Recent grid codes requires the wind farms not only to ride through the fault disturbances but also support the stability of nearby grid during severe network disturbances. This paper presents the impact of direct drive wind generators to the improvement of fault ride through (FRT) capability of fixed speed wind turbine. Three operational strategies have been investigated, i.e. without reactive power...
Dynamic optimal power flow (DOPF) is a typical complex multi-constrained non-convex non-linear programming problem when considering the valve-point effect of conventional generators. Moreover, it is mixed integer when considering the discreteness of reactive compensation devices for power system with fixed speed wind generators (FSWGs). DOPF model is established in this paper, and then an improved...
This paper presents a new operational strategy for a small scale wind farm which is composed of both fixed and variable speed wind turbine generator systems (WTGS). Fixed speed wind generators suffer greatly from meeting the requirements of new wind farm grid code, because they are largely dependent on reactive power. Integration of flexible ac transmission systems (FACTS) devices is a solution to...
Gearboxes for wind turbines must ensure high reliability over a period of 20 years withstanding cumulative and transient loads. Grid disturbances affecting wind turbines with induction generators directly connected to the grid generates electromagnetic torque transients that will result in significant stresses and fatigue of the gearbox. This paper presents a technique by which the transient torques...
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