REAL-TIME LINE FLOW CALCULATION USING A NEW SENSITIVITY METHOD

This paper presents an injected power shift distribution factor to improve the deficiencies of conventional sensitivity methods. A modified two-step technique, combining the generalized generation shift distribution factor and the proposed injected power shift distribution factor, is developed to consider the nonconformity of the demand change. Line flows can be obtained directly without running a load flow program when the system operating point is shifted to a new one. The derivation is performed iii an integral form to replace an incremental form reported in the literature and the solution algorithm is described. The potential performance of the proposed method is demonstrated by means of a standard system. Compared with the exact solution of the fast decoupled load flow calculation, the proposed method has a lower execution time and high solution accuracy. This method is very suitable for real-time application in power system operation.