Research of Available Transfer Capacity of Power Grid Considering Optimal Location-allocation of STATCOM

Abstract

The rational planning of STATCOM can effectively improve the power transmission capacity of the system. In the research of grid transmission capacity considering N-1 safety check, the nonlinear problem is difficult to solve. This paper proposes a calculation method of transmission capacity based on Benders decomposition method. Firstly, the sub-question is added to the core accident screening process to fit the actual grid operation scenario. Secondly, the parallel problem calculation method is used in the sub-problem solving to improve the calculation efficiency. The example shows that the proposed method solves the transmission capacity of the asynchronous grid, and the convergence speed is faster, which verifies the improvement effect of STATCOM on the transmission capacity of the asynchronous grid. The method in this paper can provide calculation aids for grid optimization planning and operation.