Automatic Generation Control with Virtual Synchronous Renewables

As synchronous generators (SGs) are gradually displaced by renewable energy sources (RESs), the frequency stability of power systems deteriorates because RESs, represented utility-scale solar and wind sources, do not provide inertial response, primary secondary tertiary regulation. a result, remaining SGs may be sufficient to maintain balance stability. The concept control strategies virtual (VSGs) enable inverter-based emulate outer characteristics traditional participate in active systems. This paper focuses on automatic generation (AGC) with renewables (VSRs). First, VSR strategy that enables RESs AGC is introduced. Second, based interval representation uncertainty, output RES transformed into two portions, i.e., dispatchable portion stochastic portion. In portion, can jointly SGs. Accordingly, security-constrained economic dispatch (SCED) model built considering operating mode. Third, solution employs slack variables acquire deterministic constraints Finally, proposed SCED solved 6-bus 39-bus results show that, compared maximum point tracking (MPPT) mode, VSRs SGs, increase penetration level decrease cost.