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.