Topology based approach for Efficient Load flow Solution of Radial Distribution Networks

In this paper, load flow solution is obtained for radial distribution system using a new algorithm. Network topology is exploited to build two matrices for obtaining load flow solution of radial distribution system. Effective load at each node consists of two parts. Part one is the sum of all active and reactive powers connected to nodes beyond a particular node. And part two is the power loss in all the lines connected beyond the node under consideration. Two new network matrices are proposed to obtain the two parts of the effective load. ‘bus injection to Node power matrix’ is used to identify first part of the effective load at each node and ‘Line loss to node power matrix’ is used to calculate the second part of the effective load at each node. In this method, simple algebraic expression of voltage magnitude is used. This method is very efficient and requires very less computer memory. The proposed algorithm is applied to 15bus and 85 bus systems used in the literature and the results are compared. Results are accurate up to the fourth decimal.