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pubblicazioni - Presentazione

Weather Forecast and Monitoring System of wet-snow sleeve on Overhead Power Lines in Italy

pubblicazioni - Presentazione

Weather Forecast and Monitoring System of wet-snow sleeve on Overhead Power Lines in Italy

L’infrastruttura della rete elettrica è vulnerabile ad alcuni fenomeni meteorologici estremi e ciò può creare alcune difficoltà nella gestione sicura del sistema energetico. L’accrescimento di neve bagnata sulle linee elettriche aeree è ben nota agli operatori dei sistemi di trasmissione e distribuzione (TSO e DSO). Per rispondere a questo fenomeno atmosferico dannoso, RSE ha sviluppato un sistema di previsione meteorologica denominato WOLF. WOLF, insieme alla previsione del carico di neve bagnata, fornisce una stima della corrente di anti ghiaccio necessaria per mantenere le linee libere da formazioni di manicotto di neve. Queste informazioni possono supportare gli operatori di trasmissione nell’adozione di strategie attive di mitigazione. In sinergia con WOLF, una stazione automatica denominata WILD-Wet Snow Ice Laboratory Detection- è stata installata nel comune di Vinadio nelle Alpi occidentali, ad un’altitudine di 950 m per la verifica del sistema di previsione.

The power grid infrastructure is vulnerable to some extreme meteorological phenomena and this could create some difficulties in the safe management of the power system. The wet-snow accretion on OHL (OverHead Lines) is well-known to the Transmission and Distribution System Operators (TSO&DSO). The problem affects much of Europe, with an annual number of wet-snow type steadily increasing over the total number of snowfalls. The problem imposes a greater attention to this phenomenon, either through a focused weather forecast both through active and passive mitigation strategies. To answer this harmful atmospheric phenomenon, RSE has developed a weather forecast system named WOLF -Wet snow Overload aLert and Forecasting- for the electric power grid warning. WOLF, together with wet snow load prediction, provides an estimation of the anti-icing current necessary to maintain lines free of snow sleeve formations.

These information can support the TSO operators in adopting mitigation active strategies. In synergy with WOLF, an automatic station named WILD -Wet snow Ice Laboratory Detection- has been installed in the municipality of Vinadio in the west Alps, at an altitude of 950 m asl for the forecast system verification. Through innovative measurements, it is possible to analyse in detail the most critical weather conditions for the wet snow sleeve formation on conductors. WILD is the first station in Italy devoted to study the power lines behaviour during wet snowfall events. The station is equipped with instruments with proven reliability in extreme weather conditions for monitoring wet snow loads and ice thickness on some samples of typical HV conductors. This experimental activity is the first step towards a real time monitoring system of sleeve accretion on operational overhead lines.

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