Wind Power Impact on Power System Dynamic Performance

Abstract

In this chapter the dynamic behavior of a power system with high percentage of wind power penetration (up to 40%) was studied with emphasis given to the modeling of the system, in order to examine the probable impacts. More precisely, several simulations were performed to study the impact of the wind park on the dynamic behavior of a representative autonomous power system as Crete's power system. The most considerable disturbances that were invastigated are the short circuit, the sudden disconnection of conventional power units as well as wind parks and the strong wind velocity fluctuations. Simulations have shown that the deviations of the power system voltage and frequency remain acceptable under most examined perturbations. However, the situation depends on the scheduling of the power units and the amount of allocated spinning reserve. Cause to significant replacement of conventional power generation that was supplied by synchronous generators, with wind turbines that operate either asynchronous or variablespeed generators, the dynamic performance of the power system will indeed be affected. Thus, although wind turbines affect the transient stability of a power system, they are not a principal obstacle to an adequate secure and reliable operation. The stability of a power system can be maintained even if high penetration of wind power exist by additional system measures, control enhancement and preventive actions. Finally, a method for on-line preventive dynamic security is proposed, in order to determine optimal reserves and to provide corrective advice considering dynamic security.