Rule-based adaptive control strategy for grid-forming inverters in islanded power systems for improving frequency stability

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Gouveia, J (Author) Other; C. L. Moreira (Author) FEUP; João Peças Lopes (Author) FEUP

Journal

Title: Electric Power Systems Research

Vol. 197

ISSN: 0378-7796

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Other information

Authenticus ID: P-00V-3CV

DOI: 10.1016/j.epsr.2021.107339

Abstract (EN): Operating isolated power systems with increasing shares of renewable energy sources requires the integration of battery energy storage systems in order to assure enhanced frequency regulation capabilities. The control mode of power converters interfacing battery energy storage systems to the grid can be based on grid-forming type structures given its superior performance with respect to the mitigation of network frequency disturbances. Nevertheless, in case of network faults, the interactions between existing synchronous units and the grid-forming type converters may adversely affect the global system behavior. Therefore, this paper addresses the study-case of a MW-scale isolated power system with large shares of converter-interfaced renewable generation, operating with both synchronous machines and a grid-forming type power converter. An optimal grid-forming control parameter tuning procedure considering different disturbances is presented, aiming to reduce the associated battery energy storage system power regulating effort following the disturbances. Moreover, it is proposed and discussed the need of a novel rule-based adaptive control solution to switch between different sets of control parameters used in grid-forming type converters depending on the network status following a fault-type disturbance. Extensive numerical simulations performed over different operating scenarios illustrate the performance of the proposed solution.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10