Practical Frequency Synchronization in Power Systems Using Extended High-Gain Observer Under Unknown Time-Varying Power Demand

In this paper, we consider the frequency synchronization problem in a network of lossless, connected and network-reduced power system. Frequency synchronization is an important problem in power systems as frequency deviation can lead to degraded power quality, tripping of generators, etc. We present a load-estimator-based consensus algorithm that achieves practical frequency synchronization in the presence of unknown time-varying power demand. It is shown that the synchronization error can be made arbitrarily small by tuning a controller parameter. Finally, simulations are performed to show the efficacy of the proposed controller.