Transformer-less Unified Power Flow Controller
The ability to store and shift electrical power over time is becoming more important as economies increasingly adopt renewable power sources. Meshed AC power grids have limited controllability and cannot effectively handle congestion of key transmission lines during sporadic peaks and valleys of input power such as that produced by solar and wind sources. Conventional unified power flow controllers (UPFCs) mitigate the congestion problem by balancing the load across transmission lines but require expensive large transformers with high losses.