Enhancement of Slovenian Electricity Transmission System Resilience spurred by experience and new approach

this paper aims to report primarily on new measures encompassed and introduced with respect to the relevant technical regulations put recently in force and on endeavors in immediate mostly technical modifications of assets imposed by lessons learned during past emergency events, as well. Emphasis was given particularly to enforcing of asset’s mechanical withstand capability based on scrutinized analyses of loads experienced during past emergency events. Increasing withstand of critical structures was selectively made. This paper gives an overview of various essential long-term activities and shows the level of new developments achieved after encountering bitter experiences during last decade. The paper deals also with assessing loading limits of selected essential network components aiming to reduce system vulnerability during emergencies hence increase its resilience. Majority of the experienced emergencies were produced by harsh weather impacts in the wintertime. There were many cases of OHL failures, which triggered in the aftermath scrutinized analyses aiming to determine the mechanical loads, encountered. Suitable refurbishing of OHL critical parts have been done respecting new standards. Aiming to allow for expedite restoring of OHL operating capability in emergencies the introduction of Emergency (modular) towers usage was selected and successfully implemented. Owing to the notorious fact, that OHLs’ and power transformer’s loading limits can be extended, several projects were launched to assess, evaluate and eventually up-grade the limit capacity implementing advanced monitoring equipment. Intensive support to asset management was done, such as maintenance optimization, state-of-the-art approach, condition monitoring of HV equipment, assets life cycle assessment and evaluation, etc. One of all-important steady processes remains to encourage the political decision makers to support the erection of new facilities notably OHL through simplifying and facilitating the spatial planning procedure (OHLs Right of Ways!) as well as mediating the social public-private dialogue. All these endeavors being in favor of upgrading the power system resilience.