Extended Black-start Schemes of Power Systems

Restoration of a power system after a major blackout is a very important issue to the security defense of power systems.Reasonable black-start schemes are required to restore the power system as soon as possible.In view of the fact that some current black-start power sources usually have large capacity and good operating performance,a novel extended black-start strategy was proposed to restore the power system in a more rapid way,in which a single black-start source is used to start more than one power plant simultaneously.The mathematic model of the extended black-start strategy was presented,where the restoration target is to maximize the total weighted power generation output(MW?h) over a restoration period with the generator's start-up and power system's operating constraints being satisfied.Then,the problem was changed into a two-dimensional knapsack problem,and the algorithm of classic Dijkstra and backtracking was adopted to determine the best extended black-start scheme.The effectiveness of the proposed method was validated by the optimization results on the New England 10-unit 39-bus power system and the southern power system of Hebei province.