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A challenge for renewable and hybrid power systems is the dynamically stableintegration of Renewable Energy Sources (RES). This paper specificallyinvestigates the influence of intermittent RES and measurement delays frompower electronic resources on frequency stability. In addition it presents anOpen-Source framework to undertake dynamic RES modeling.  First, for local intermittent fluctuations in lossy distribution grids I finda remarkable and subtle but robust interplay of dynamical and topologicalproperties, which is largely absent for lossless grids.  Second, I show how delays may induce resonance catastrophes and how theexistence of critical delays sets an upper limit for measurement times.Further, I investigate whether centralized vs. decentralized power production,for different grid topologies, changes this behavior.  Third, the code used for producing the above results is in the process ofbeing published as an open-source Software framework called PowerDynamics.jlbeing developed in the programming language Julia. It will cover the rich noveldynamics caused by the integration of RES with the implementation ofDifferential Algebraic (DAEs), Delayed Differential (DDEs) and StochasticDifferential Algebraic Equations (SDAEs).  Altogether, this paper investigates the stability of future power gridsmoving towards integrating more aspects of renewable energy dynamics andpresents an adequate modeling framework for RES integration studies.

Modeling the dynamics and control of power systems with high share of renewable energies