The effect of wind parks on the operation of voltage control devices

The penetration of wind generation in distribution networks is increasing and is expected to increase further in the near future. In the case of weak networks, serious concerns are expressed regarding the degradation of quality and the increasing needs for compensation and more efficient control strategies. This paper presents the effects of wind turbine operation on the distribution network operation expressed as probability density functions of voltages along the feeder and it proposes a method for the adjustment of voltage control devices based on probabilistic constrained load flow. It is shown that the method leads to operation of distribution networks with increased wind power without voltage limit violations and fewer adjustments in the control setpoints.