Second‐order matrix pencil‐based phasor measurement algorithm for P‐class PMUs

Abstract

Phasor measurement units (PMUs) have made real-time monitoring and control of power systems possible, thanks to their time synchronisation and fast reporting rate. It is critical that the PMUs can track the dynamics of complex power systems accurately. In this study, a measurement bandwidth extraction method based on signal reconstruction is proposed to filter the out-of-band signals without extra response time. The synthetic phasor is modelled by the second-order Taylor's series expansion. A matrix pencil-based fast phasor measurement algorithm is proposed for P-class PMUs. Simulation and experiment results show that the accuracy and the response time of the proposed algorithm meet the requirements of the IEEE standard. Field data test shows that out-of-band signals have been reduced and the dynamic change of power system can be accurately reflected by phasor estimations. All results demonstrate that the proposed algorithm is suitable for P-class PMUs in complex power systems.