GENERALIZED THREE PHASE UNBALANCED LOAD FLOW WITH RENEAWALE GENERATIONS

Abstract

The technique for the power flow solution of the distribution system with renewable generation is presented in this paper work. The load flow problem is solved by the methods one is direct approach for distribution system and the second is the fortescue equivalent admittance matrix approach for distribution load flow. The first load flow approach is based on building two matrices in taking into account the different characteristics of the distribution system. The two developed matrices are BIBC and BCBV matrix. The matrix giving the relation between bus current injections to the branch currents is known as BIBC matrix and the matrix giving the relation between branch current to the bus voltage is known as BCBV matrix. The above two matrices provides the direct approach solution for load flow when combined together. In the second method the phase admittance matrix is converted into fortescue coordinate. Then injected current is calculated from the given power. From this current the voltages are calculated. The power is calculated from this voltage and current. Error in the power is checked if it is in within the limit then the load flow is completed. The two different renewable generation models discussed briefly. The renewable generation is accommodated in the load flow with simply by considering PQ model.