Analysis of grid events influenced by different levels of renewable integration on extra-large power systems

In this work, the impact of implementing a large amount of decentralized renewable energysources (RES) of different scales on an extra-large power grid is investigated. Three scenariosare created, substituting 10%, 20%, and 30% of the conventional energy production by RES.For this purpose, the initial dynamic model of Continental Europe in combination with theindustrial power system application DIgSILENT PowerFactory was used. In order to comparethe behavior of different applied scenarios, a performance index was developed to evaluate andrank the effects of network disturbances by means of time-domain simulations. The performanceindex was designed based on three different criteria that analyze the oscillatory content andthus, the severity of a given event. The initial power flow of the dynamic model was identifiedas a limiting factor for the integration of RES, therefore two additional power flows weredeveloped following an innovative procedure. Through the methodologies mentioned above, itwas found that Turkey is the most sensitive to such changes, which are amplified by increasingimplementation of RES and often lead to inter-area oscillation