Secondary and Tertiary Voltage Regulation based on optimal power flows

This paper proposes a combined Secondary and Tertiary Voltage Regulation (SVR+TVR) methodology based on real-time optimal power flows (OPFs) to periodically update the generators' voltage regulator set points. Minimum active power losses (MAPL) and maximum loadability (ML) OPF approaches are used for the proposed SVR+TVR control. The presented technique is compared against a “classical” SVR control, where the pilot-bus set points are determined by means of MAPL-OPF- and ML-OPF-based TVR approaches. Time domain simulations of the New England 10-machine 39-bus system are used to validate the proposed SVR+TVR technique, and to demonstrate some of its advantages with respect to existent SVR and TVR approaches.