Newton-Raphson decoupled load flow with constant matrices of condutance and susceptance

This paper presents a new load flow based on Newton-Raphson method. The matrices used in the method are the constants matrices of conductance and susceptance. The proposed method uses the equations to calculate the voltages angles and voltages modules in decoupled form. In the scheme of iteration values most up to voltages angles are used to calculate voltages modules and the same procedure is used in the calculation of voltages angles. The method shows good results in systems of transmission, distribution and transmission systems coupled with distribution feeders. Several systems are used in test including the classical IEEE systems. The results obtained with the proposed method are compared with results obtained with the methods of constants matrices XB, BX and Primal and the iterations number for convergence of the new method present a better performance than the decoupled versions already mentioned and the new method presents convergence where all other methods tested fail to convergence.