Understanding the 2024 Reduction in South African Loadshedding: A Technical Analysis
摘要
Between 2018 and 2023, South Africa experienced increasing levels of loadshedding, that then came to an abrupt stop after March 2024 up to the present, August 2024. The sudden decline in loadshedding occurrences in South Africa sparked public debate on possible causes. This study aims to inform this debate by analysing the power generation data of the national utility Eskom, focusing on the reduced loadshedding event frequency from a technical standpoint. This study investigates recent trends in typical loadshedding causes, such as planned and unplanned maintenance and breakdowns, while assessing the resulting Energy Availability Factor (EAF), alongside an analysis of changes in national electricity demand and the adoption of embedded solar photovoltaics (PV). The study evaluates these factors against previously used traditional loadshedding mitigation methods such as reduced maintenance schedules, the use of diesel-burning Open Cycle Gas Turbines (OCGT), and new generation capacity installation. The study finds that the primary reason for the reduced loadshedding appears to be an improved maintenance strategy by the utility, which improved Planned and Unplanned Capacity Factor Losses (PCFL and UCFL) and subsequently improved the EAF. The findings also indicate a significant increase in embedded private solar PV generation which reduces typical daily demand. New utility-scale generation capacity installations have remained stagnant, contributing minimally to the reduction in loadshedding events. The analysis also shows no significant increase in OCGT power production in recent months compared to similar time periods in previous years.