Method for evaluating power supply reliability of power grid in snow disasters based on meteorological parameters

The invention belongs to the field of power system reliability and risk evaluation and relates to a power grid power supply reliability evaluation method. The method puts forward a power grid reliability evaluation idea for the problem that the existing method for evaluating the power supply reliability of a power grid in snow disasters does not take continuity of weather worsening into consideration. First, the meteorological load which can be borne by a power grid in snow disasters is described by use of easy-to-measure conventional meteorological parameters; then, the relation between the meteorological load and the system line outage probability is deduced and a fault probability model taking different design standards into consideration in snow disasters is established according to the mass distribution of system components and by considering the system design standard; and finally, the power supply reliability calculation methods of load points of the power grid are worked out. The method takes conventional meteorological parameters as the starting point and avoids large investment. The measured meteorological parameters are actual meteorological environment parameters borne by a system, which ensures the authenticity of calculated results. The method is highly practical.