Restoration Of Large Area Breakdown For Distribution Grids Based On Tabu Search Algorithm

To reconfigure the distribution grids under emergency states with the minimum interruption cost, a novel Tabu search approach is put forward. The set of tripped switches is used as candidate solution. Some virtual tripped nodes are defined at the end of terminal nodes and by the source nodes. The neighborhood searching is committed by moving a tripped switch to the adjacent node of its upper stream or down stream. A Tabu list is formed for the tripped switches. The electrical limitations, the allowed voltage range and the required topology are used as the constraints. The global aspiration criterion is adopted. An approach to form the switching operation sequence is suggested.The switches to be operated are categorized into two classes, based on which, an approach to form the switching operation sequence for both restoration process and return-to normal process is suggested. The loads with larger lost costs are restored in a higher superiority. The overload of feeders and loop in topology are avoided in the processes, as well. The problem and its solution of switching operation failure in the restoration process and return-to normal process are also discussed.Based on above works, an application software based on VC++ 6.0 is developed, the switching operation sequence for both restoration process and return-to normal process is obtained, two typical example is given and the results of analysis show that the proposed approach is feasible.