Abstract
Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since high renewable penetrated power grids result in a low-inertia system, this electromechanical characteristic provides support to the dynamic stability of active power and frequency in the power generation area. This goal can be achieved through the proper tuning of virtual electromechanical parameters that are embedded in the control layers of power converters. In this paper, a novel mathematical pattern and strategy have been proposed to adjust dynamic parameters in Renewable Static Synchronous Generators controlled by SPC (RSSG-SPC). A detailed dynamic modeling was obtained for a feasible design of virtual damping coefficient and virtual moment of inertia in the electrometrical control layer of RSSG-SPC’s power converters. Mathematical solutions, modal analysis outcomes, time-domain simulation results, and real-time validations of the test in IEEE-14B benchmark confirm that the proposed method is an effective procedure for the dynamic design of RSSG-SPC to provide these dynamic stability supports in grid connection.
Highlights
This paper aims to target three main goals: (i) a deep review and analysis of the electromechanical performance of RSSG-Synchronous Power Controller (SPC), (ii) proposal of solution for enhanced adaption of RSSG-SPC operation in the grid connection to facilitate the contribution of RSSG-SPC in the power-sharing process as well as frequency regulation, and (iii) proposal of a regular and coherent pattern as well as the mathematical expressions for the electromechanical
A deep analysis of RSSG-SPC internal dynamics has been preformed which revealed that an RSSG-SPC can manage its internal dynamics with a proper dynamic degrees of freedom relying on the dynamic performance of SPC
This dynamic flexibility has been accessible over the virtual damping and virtual moments of inertia settings in RSSG-SPC
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Expansion of renewable generation is one of the main targets of most countries in the modernization of the electricity industry [1]. The competition is on the power capacity level of such generation units, and another key trend is the development of operation technologies for enhanced adaption with the rest of the grid [2]. There is a consensus that the goal of the international organizations is to achieve double the capacity of current renewable generation. This competition is expected to be more intense during the forthcoming years [3]
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