LOAD FLOW STUDIES USING EXACT SECOND ORDER METHOD

Abstract

The work presented deals with load flow studies using second order methods in cartesian coordinate. One of . the most. widely used load flow method is Newton Raphson. Method.. Because. of its important feature that the number of iterations for; conver_oence is small irrespective of the system size, However it has a disadvantage that the time required to reach the solution is rather long because of matrix, inversion required in each iteration. The second order method is several times faster than Newton Raphson method because of single. inversion involved and has the s ime mathematical complexity, accuracy, and memory requirement as the Newton Raphson method. As the. system size increases, the second order method becomes. more advantageous. As an•example, the. convergence time for 57 bus was only about one fourth of the. Newton Raphson method. Chapter II deals with review of load flow calculation methods. in Chapter III various second order method and the equation on wf ,ichomputat.ions are based have been dealt with. Detailed aescription of the computer algorithm for both. Newton Raphson method and second order method have been given i.n Chapter IV, Chapter V gives the details and data. of the pro--.. .. blems studied and results obtained. The second order method and Newton Raphson methods have been tested on a 5 bus, 8 bus', IEEE .14 bus, IEEE 30 bus and IEEE 57 bus standard test system. The computational work has been carried out on DEC 2050 computer system of the Roorkee University and execution times referred in this work corres-pond to DEC 2050 system.