Methods for evaluating penetration levels of wind generation in autonomous systems

During the last decades there has been a continuous growth of wind power generation. This trend, especially in Greek islands, where wind potential is high, raises the issue of acceptable penetration levels of wind generation especially in autonomous systems. This work is part of a research program between PPC S.A. -of Greece and NTUA. The method is applied to two islands, Crete and Rhodes, where wind power penetration is expected to be increased within the next years. The power grid of each island is modeled and speed governors, automatic voltage regulators of conventional plants, as well as wind turbines are modeled in detail. Case studies are formed and simulation results are produced, discussed and eventually the penetration levels are determined, together with proposed measures to increase them.