Harmonic analysis for power networks

The problem of harmonic penetration in power networks is of increasing importance. One method of estimating the penetration is to measure the harmonic voltages at points of common coupling and at selected locations in the network. This paper presents a method of solution which predicts harmonic penetration using a digital computer. The method of calculation is based upon the concept of conventional load flow. In conventional load flow only the fundamental frequency component of the voltage is calculated. In the proposed method this can be extended to any desired frequency range and these voltages at different frequencies are calculated simultaneously. The major obstacles to such an approach would be the establishing of a mathematical model and valid assumptions to ensure consistent convergence. The proposed method overcomes both of these obstacles. The method had been tried on a sample network with different starting points and with different loading conditions, and consistent convergence was obtained.