2018/02/24 by Dominic Groß, Marcello Colombino, Groß, Dominic +5 · 12 citations
Engineering · #Microgrid Control and Optimization #Power System Optimization and Stability #HVDC Systems and Fault Protection
paper · pdf · doi:10.48550/arxiv.1802.08881
In this work, we analyze the effect of transmission line dynamics on\ngrid-forming control for inverter-based AC power systems. In particular, we\ninvestigate a dispatchable virtual oscillator control (dVOC) strategy that was\nrecently proposed in the literature. When the dynamics of the transmission\nlines are neglected, i.e., if an algebraic model of the transmission network is\nused, dVOC ensures almost global asymptotic stability of a network of AC power\ninverters with respect to a pre-specified solution of the AC power-flow\nequations. While this approximation is typically justified for conventional\npower systems, the electromagnetic transients of the transmission lines can\ncompromise the stability of an inverter-based power system. In this work, we\nestablish explicit bounds on the controller setpoints, branch powers, and\ncontrol gains that guarantee almost global asymptotic stability of dVOC in\ncombination with a dynamic model of the transmission network.\n