Stavros A. Papathanassiou

TL;DR: In this article, the authors provide an overview of grid code technical requirements regarding the connection of large wind farms to the electric power systems, including active and reactive power regulation, voltage and frequency operating limits and wind farm behaviour during grid disturbances.

TL;DR: A benchmark LV network developed within the EU project “Microgrids” and later adopted as a benchmark LV system by CIGRE TF C6.04.02 maintains the important technical characteristic of real utility grids, whereas, at the same time, it dispenses with the complexity of actual networks to permit efficient modeling and simulation of microgrid operation.

Abstract: This paper presents an investigation on wind turbine (WT) contribution to the frequency control of noninterconnected island systems The capability of WTs to participate in the primary frequency control and offer primary reserve is discussed The investigation includes both transient frequency support (inertial response) and permanent frequency response (droop characteristic), as well as the combined application of these concepts A quantitative analysis is presented for the expected benefits and drawbacks of each method, including the appropriate selection of their parameters The power system of Rhodes Island has been selected as a study case, which includes different types of conventional generation and the three basic WT types, based on Active-Stall Induction Generator (ASIG), Doubly Fed Induction Generator (DFIG), and Permanent Magnet Synchronous Generator (PMSG)

TL;DR: In this article, a set of analytical expressions is introduced to determine the five parameters of the single-diode model for crystalline PV modules at any operating conditions, in a simple and straightforward manner.

TL;DR: In this paper, the first wind-hydro-pumped-storage hybrid stations in the world are described and a suitable operating policy is introduced, both for the HPS and the overall generation system of Ikaria, taking into consideration the existing regulatory framework for HPS in isolated island grids.