Analytical Implementation of Balanced IEEE-33 Bus Radial Distribution System using Forward - Backward Sweep Load Flow Algorithm for power loss estimation
Three phase load flow analysis of balanced radial distribution system is presented in this manuscript using forward-backward algorithm. Forward-backward algorithm initiate with a backward sweep followed by forward sweep. A combination of Kirchhoff’s Current Law and Kirchhoff’s Voltage Law is utilized in backward sweep to acquire the upstream bus voltage of each line. On the other hand, downstream bus voltage at each line is updated during forward sweep analysis. The ratio of real and imaginary components of voltage at each substation bus is calculated using linear proportional principle. This procedure of forward-backward algorithm continues till convergence point, where the difference between calculated and specified voltage at the substation is under tolerance limits. This proposed algorithm is tested for standard IEEE 33 bus balanced radial distributed system. A 3-phase system with 11.32, 12.01, 12.66, 13.28, 13.87, 14.43, 14.98, 15.51 kV rating and its corresponding 80, 90, 100, 110, 120, 130, 140, 150 MVA rating at base impedance of 1.6028 p.u. is analyzed effectively for bus voltage level, active power loss, reactive power loss and total line loss.