Simplified Approach for Load Flow Analysis of a Radial Distribution Network and Symmetrical Fault Analysis

This paper presents a simplified approach for the load flow study of a radial distribution network and symmetrical fault analysis. Kirchhoff’s voltage law (KVL) and Kirchhoff’s current law (KCL) are used to determine the bus voltage at each bus and the branch current respectively by using the backward and forward sweep algorithm. The branch current depends only on the current injection at neighboring bus and current in adjacent branch is calculated using backward algorithm starts from the end node of the line to the root node. The voltage calculation is done by forward algorithm which starts from the root node and move towards the end node. The symmetrical fault current and voltage at each bus after the fault is calculated by using simply the total impedance from the faulted bus to generating bus and the pre-fault voltage at faulted bus. Satisfactory simulations are performed by using MATLAB, and short circuit analysis done in ETAP Software.