Decoupling and dimension reduction method for distribution system security region

The application of the security region methodology in a practical distribution system with large scale normally requires computer memory and high computation time. To overcome this problem, article proposes decoupling dimension reduction method, which can significantly accelerate calculation (DSSR) is important for DSSR theory large-scale systems. First, definition reflecting size solution space time complexity proposed. And algorithm also given. Second, method suitable analysis Following an incidence matrix be obtained from expressions, further divided into multiple block matrices. According to feeder combinations matrices, decoupled sub-networks more efficient analysis. Finally, 10kV network used case study validate proposed method. results time-consuming calculation, that is, TSC curve show reduce significantly, making cases.