Title :
Comparison of accuracy in load-flow programs
Author :
Roebuck, R. ; Saylor, Ch ; Wallach, Y.
Author_Institution :
Niagara Mohawk Power Corp., Syracuse, NY, USA
Abstract :
The equations for solving the load-flow problem by the Newton-Raphson method are developed in order to show that they are extremely sparse. By running LINPACK, optimally ordered factorization and parallel optimally ordered factorization routines, it is shown that the last two generate rather high roundoff errors, especially when close to a solution. The overall conclusion is that because of error accumulation a larger number of iterations is needed to solve the load-flow problem by the optimization methods than by the LINPACK routines. Accuracy was traded for memory space
Keywords :
load flow; optimisation; power system analysis computing; roundoff errors; LINPACK; LINPACK routines; Newton-Raphson method; accuracy comparison; load-flow programs; optimization methods; parallel optimally ordered factorization; roundoff errors; Admittance; Arithmetic; Equations; Jacobian matrices; Voltage;
Conference_Titel :
Circuits and Systems, 1990., Proceedings of the 33rd Midwest Symposium on
Conference_Location :
Calgary, Alta.
Print_ISBN :
0-7803-0081-5
DOI :
10.1109/MWSCAS.1990.140673
