Reduced-order modelling of solar-PV generators for small-signal stability assessment of power systems and estimation of maximum penetration levels

• Published in: IET generation, transmission & distribution Vol. 12; no. 8; pp. 1838 - 1847
• Main Authors: El-Shimy, Mohamed, Sharaf, Adel, Khairy, Hossam, Hashem, Gamal
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 30.04.2018
• Subjects: complex dynamic performance; enhanced search algorithm; ETAP‐software environment; fault‐ride through requirement; MATLAB; maximum penetration level estimation; maximum power point trackers; maximum power point tracking; mixed mode generation; photovoltaic power systems; power generation control; power generation faults; power grid; power grids; power system stability; PSAT; reduced order systems; relevant grid code; renewable source; Research Article; search problems; security; small‐signal stability assessment; solar photovoltaic generator; solar power stations; solar‐PV generator; SPVG model; standard reduced‐order modelling; power generation control; small-signal stability assessment; power grid; solar-PV generator; MATLAB; security; PSAT; solar photovoltaic generator; SPVG model; reduced order systems; standard reduced-order modelling; power generation faults; power grids; fault-ride through requirement; search problems; renewable source; ETAP-software environment; power system stability; enhanced search algorithm; solar power stations; complex dynamic performance; photovoltaic power systems; relevant grid code; maximum penetration level estimation; maximum power point trackers; maximum power point tracking; mixed mode generation
• ISSN: 1751-8687; 1751-8695
• DOI: 10.1049/iet-gtd.2017.0381

There is an urgent need for constructing adequately accurate standard reduced-order models of various renewable sources for fast assessment of the stability and security of power grids. This study focuses on this theme considering solar-photovoltaic generators (SPVGs). The main objectives of this study include the construction of a valid reduced-order dynamic model for SPVGs, analysis of the impact of the SPVG model on the stability of the host power system in a mixed mode generation under various integration scenarios, and evaluation of the consistency of SPVGs with fault-ride through requirements based on relevant grid codes. Various modes of operations of SPVGs are analysed and considered using an enhanced search algorithm for maximum power point tracking. In addition, this study proposes an algorithm for the estimation of the maximum penetration level of SPVGs constrained by the small-signal stability of power systems. The results presented in this study are based on dynamic simulation and validation using the MATLAB, PSAT, and ETAP-software environments for stability assessment of power systems. The results show that the developed reduced-order model indicates an acceptable accuracy accompanied with simplicity in simulating complex dynamic performances of host power systems with SPVGs integration.