Harmonics Resonance Assessment of Power Systems Using Eigenvalue Sensitivity Analysis

To detect and alleviate harmonic resonance in a power system have been a delicate issue. In this paper, the resonance behavior of a power system is determined by means of eigenvalue sensitivity analysis. The most influencing parameters to mitigate resonance modes are detected using the sensitivity of critical eigenvalues with respect to the network various components in a frequency range. Also, results inferred from the criteria of driving point impedance and bus participation factors are compared with those of the sensitivity analysis. Where to locate capacitors and filters to mitigate the resonance modes is obtained using these criteria. The methods are tested on the wellknown New Zealand test system as a case study. Simulation results are discussed in detail to investigate the methods’ efficiency and capability.