A Novel Optimal Power Flow Model and Algorithm Based on the Imputation of an Impedance-Branch Dissipation Power

This paper presents a new optimal power flow model based on the algorithm of Imputation of an impedance-branch dissipation power. The complex nonlinear constrained expression of line security and stability constraints in optimal power flow model is transformed into an approximate linear expression in which generator power output serves as a variable. This model is solved by successive or piecewise linear programming in light of the nonlinearity degree of the constraints, so the low efficiency controls are compressed. It considers line security and stability constraints directly, rather than examines them passively and modifies them in the case of Newton´s method, so the marked advantage of this method is its good convergence and solution efficiency. Simulation results show that the proposed model and algorithm is effective and feasible.