Impact of Wind Power Plants on Voltage and Transient Stability of Power Systems

With the scenario of wind power constituting up to 20% of the electric grid capacity in the future, the need for systematic studies of the impact of wind power on both voltage and transient stability of the grid has increased. A large number of parameters will affect such studies. For this paper, studies were conducted on a standard three-machine, nine-bus system augmented by a radially connected wind power plant (WPP), which contains 22 wind turbine generators (WTG). The studies include examining the voltage stability (P-V) curves of the system at the point of interconnection (POI), as well as in the radial system with and without the WPP. These voltage stability studies are done for the base case as well as for contingencies. This is followed by transient stability studies for three-phase faults, again at the POI as well on the radial system. The transient stability studies illustrate the capability of the WPP. The conclusions drawn from this study will be supported by an analytical study in the future.