Distributed Robust Power Flow Control For Photovoltaic Generators Over Lv Microgirds With Limited Communication Bandwidth

This paper presents a robust distributed event-triggered control strategy that will regulate the power output of massive photovoltaic (PV) generators in a low-voltage (LV) microgird, which can achieve all of PV generators to operate at the same ratio of available power based on their status and capacity through a spare network with limited communication bandwidth and time delays. Due to employing event-triggered communication with time delays, the proposed control strategy is fully distributed and only driven at their own event time, which effectively reduces the frequency of controller updates compared with continuous-time feedback control, moreover is also robust to time delays. Furthermore, each PV only requires the local voltage and current measurement from its own and some nearest neighbors (but not all) for the distributed power control at the last event-triggered time to achieve the active and reactive power outputs to operate at the same ratio. The inequality technique is employed to devise the stability and convergence analysis of the proposed dynamic event-triggered conditions. The effectiveness of the proposed control strategy is verified under various scenarios by a modified IEEE 34-bus test network in MATLAB/SimPowerSystems.