Grid Load Balancing Using Phase Adapter Via Fuzzy Logic

Balancing the load in the distribution networks is one of the basic needs to ensure the operation of power systems without additional energy load. Unbalance load on low voltage side distribution transformer is one of the problems in the electrical distribution systems due to several nonlinearities. The cause of the nonlinearities can be attributed to: the nature of subscribers’ power demand, the instantaneous changes in the electricity usage at homes daily and seasonally which varies based on the outside temperature. This can lead to a non-zero neutral current and technical and commercial losses. Nonzero neutral also called return current refers to the flowing of unbalanced three phase currents that produces unbalanced voltage drops in the electric feeders (technical losses). These losses lead to money losses for electrical distribution companies. This energy was supposed to be sold to subscribers, but it was lost to the feeder lines. In this research, a fuzzy logic was utilized to design a load balancing controller using MATLAB. ETAP program was also used to make load flow analysis. The designed fuzzy controller was able to reduce the losses by 3.5%.