Due to the integration of distributed photovoltaic (PV) and access of electronic devices, power systems are suffering from serious voltage problems, and therefore they require greater flexibility. By using appropriate methods, a PV cluster can autonomously regulate reactive power output in a distributed manner to improve voltage profile. In this paper, a distributed Newton-based reactive power control method to realize distributed voltage control for high penetration of PV generation is introduced, which can fast respond to voltage mismatch and address the robustness issues of (de-)centralized approaches against communication delay and noises. The proposed distributed control scheme for PV clusters can coordinate PV to provide voltage regulation in a more efficient, reliable and flexible way than existing decentralized methods.
Keywords PV cluster, distribution network, voltage control, distributed control, Newton method