Intelligent Flexible Control Device and Technology for Distributed PV

Distributed photovoltaic (PV) utilizes renewable energy sources for power generation, offering advantages such as carbon emission reduction and environmental friendliness. When distributed PV power exceeds the regional load consumption limits, it may lead to the issue that the reverse power flow exceeds the rated capacity of transformers and distribution feeders. This could result in abnormal operation of power equipment and power quality issues. Since these situations have frequently occurred in some regions, this paper proposes two developed devices and a specific implementation method to monitor, calculate and control distributed PV systems in real-time. These devices and systems have been widely applied. The conclusion of practice is that if the friendly interaction between distributed PV and the power grid can be achieved, the large-scale power outages under the extreme situations can be prevented.