Wind parks' operation in the context of system adequacy

From the experience of TSOs in whose systems are installed significant wind power, it appears that wind parks (WP) have technical and operational characteristics which significantly differs them from other types of power plants. WP's available power can vary between zero and installed power, depending entirely on meteorological factors and, in particular, on the wind speed. WP production can be predicted only within certain limits, which makes it necessary for TSO to balance in real time the differences between prognosis and actual production, which can be significant. Since the volume of installed power in WP for which are expressed intentions of connection, is much higher than the RTR in the National Energy System (NES), the RTR value is the power limiting criterion. Thus, according to the rules of ANRE, Transelectrica annually establishes the maximum installed power in WP, acceptable in terms of RTR availability existing in NES.