A NEW FAST SEARCHING METHOD FOR TRANSMISSION SECTION BASED ON VIRTUAL BRANCH MODEL

摘要

Transmission section is of great significance for maintaining the stability of the power grid. There are few researches focus on the power flow transmission section searching of the system when the multi-branch disconnected at the same time. According to the characteristics of power flow transfer after branch disconnection, a transmission section search algorithm based on virtual branch model is proposed. After the multiple branches are disconnected at the same time, all the broken branches are equivalent to a virtual branch through the established virtual branch model. And define the flow exceed risk index based on virtual branch. All the branches constituting the transmission section can be obtained by screening the branches in the power flow transfer area through the flow exceed risk index. By comparing the simulations results of the proposed method with the results of other research methods in IEEE-39 system, it can be concluded that the proposed method in the paper is more efficient to obtain the transmission section than other exist methods.