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Presentazione RSE 17000663

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

Presentazione

WEMC - World Energy and Meteorology Council, 27-28, Giugno-2017.

Richiedi il materiale (12.88 MB, .pdf)

M. Lacavalla (RSE SpA), P. Marcacci (RSE SpA) , R. Bonanno (RSE SpA)

GRID RESILIENCE 2017 - Security and vulnerability of electric system

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). 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.

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.