Improving Dynamic Security in Islanded Power Systems: Quantification of Minimum Synchronous Inertia Considering Fault-Induced Frequency Deviations

• Type: Article in International Scientific Journal
• Date: 2023

Authors

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

Journal

The Journal is awaiting validation by the Administrative Services.

Title: Electricity

Vol. 4

Pages: 114-133

ISSN: 2673-4826

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00Y-8QC

DOI: 10.3390/electricity4020008

Abstract (EN): In isolated power systems with very high instantaneous shares of renewables, additional inertia should be used as a complementary resource to battery energy storage systems (BESSs) for improving frequency stability, which can be provided by synchronous condensers (SCs) integrated into the system. Therefore, this paper presents a methodology to infer the system dynamic security, with respect to key frequency indicators, following critical disturbances. Of particular interest is the evidence that multiple short-circuit locations should be considered as reference disturbances regarding the frequency stability in isolated power grids with high shares of renewables. Thus, an artificial neural network (ANN) structure was developed, aiming to predict the network frequency nadir and Rate of Change of Frequency (RoCoF), considering a certain operating scenario and disturbances. For the operating conditions where the system frequency indicators are violated, a methodology is proposed based on a gradient descent technique, which quantifies the minimum amount of additional synchronous inertia (SCs which need to be dispatch) that moves the system towards its dynamic security region, exploiting the trained ANN, and computing the sensitivity of its outputs with respect to the input defining the SC inertia.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20