Prediction method and device for supply and demand balance scene of regional power grid

The invention discloses a prediction method and device for a supply and demand balance scene of a regional power grid. The method comprises the following steps: acquiring uncertainty components of a power supply and a load in the regional power grid; calculating an actual output probability distribution curve of the uncertain component; obtaining an output sequence of each uncertain component according to the actual output probability distribution curve; selecting a maximum output value and a minimum output value at the same moment every year in the output sequence, and constructing an output interval of each uncertain component; dividing the output interval into a plurality of grades, and calculating the output occurrence probability of each uncertain component in different output intervals; combining the levels of all the uncertain components, constructing various supply and demand balance scenes, and calculating the output generation probability of the uncertain components in each supply and demand balance