PREDICTIVE SMART GRID RE-STRUCTURING BASED ON EXPECTED LOAD AND POWER GENERATION

摘要

A method for structuring an electric utility grid having traditional and renewable sources of electric power uses a weather forecasting system to determine, for a time interval, whether there are paths between all generating units and all consuming units satisfying certain constraints. The method includes computing a probable output for each of the generating units, both traditional and renewable, and computing a probable load for each of said consuming units for the time interval using both historical and weather forecast data. The method also includes determining the maximum load capacity of each segment in the utility grid for the time interval, the segments being the power lines making up the grid, and assigning the maximum load capacity of each segment to be a constraint therefor for the time interval and computing whether there are paths from each of the generating units to each of the consuming units for which the maximum load capacities will not be exceeded. If such paths exist, the method further concludes with setting the utility grid to the paths; and transmitting electric power over the paths for the time interval. If such paths do not exist from each generating unit to each consuming unit, the method instead continues by reducing the maximum capacities of the generating units; and recomputing whether there are paths from each of the generating units to each of the consuming units as many times as is necessary to find paths satisfying the constraints, each time further reducing the maximum capacities of the generating units.

主权项

1. A method for a utility grid having a network of interconnecting segments of power lines connecting generating units to consuming units, each of said interconnecting segments-having a maximum electric power capacity, said method comprising:
computing a probable electric power output for each of a plurality of generating units, each of said plurality of generating units having a maximum electric power generating capacity, said plurality of generating units including at least one generating unit whose electric power output depends on the weather, and a respective confidence level associated with each of said plurality of generating units, for a given time interval; computing a probable electrical power load for each of a plurality of consuming units, each of said plurality of consuming units having a maximum allowed electric power load, and a respective confidence level associated with each of said plurality of consuming units, for said time interval; and determining whether there are paths having one or more segments of power lines from each of said generating units to each of said consuming units, said paths satisfying the following constraints:
a) the actual output of each of said generating units is less than or equal to the probable output thereof for said time interval;b) the actual load of each of said consuming units is less than or equal to the probable load thereof for said time interval; andc) the actual load capacity for each of said segments is less than or equal to the maximum load capacity thereof for said time interval.