SYSTEM.AND METHOD FOR ASSESSING FIRE HAZARD OF TYPICAL OIL IN WIND TURBINE NACELLE

摘要

The present invention relates to a system and method for assessing the fire hazards of typical oils in a wind turbine nacelle. A thermogravimetric analyzer is used to obtain key pyrolysis characteristic parameters of oils used in the wind turbine nacelle atiifferent.heating'rates ineuiair atmosphere, and a cone calorimeter is used to obtain reaction—to—fire characteristic parameters and derived parameters under different radiant heat fluxes. The development process of a wind turbine nacelle fire is divided into five stages of ignition, growth, flashover, full development, and decay. Based.on the characteristics of different stages, such as the ignitionandpwrolysischaracteristics,heatandsmokerelease capabilities,andheatandsmokehazardcharacteristicsofoils, a three—layer structure system of fire hazard assessment is established.Thepresentinventioncharacterizesthepyrolysis and reaction—to—fire characteristics of main and typical fire loads (four oils) in the nacelle, and proposes a holistic approach to multi—scale correlations between pyrolysis and combustion. The present invention realizes the multiple assessment methods for the potential fire hazards throughout the whole operation process of a wind turbine. The present invention has a solid theoretical foundation as well as the advantages of simpledperation, reliable results anclexcellent repeatability. The present invention provides a basis for the research and application of intrinsic safety in the wind turbine nacelle.