Move the tennis balls representing Zero, Positive, and Negative sequence current phasors. Watch how each of the sequence currents affects the unbalanced phase currents.
When first learning about three-phase power, three-phase voltage and current are assumed to be balanced, which allows for analysis of the power system as if it were a single-phase network. In the real world, power systems are more often than not unbalanced. Unbalanced systems are significantly more difficult to analyze faults for. In 1918, Charles Fortescue came up with symmetrical components, a way to use three balanced systems (zero, positive, and negative sequences) interconnected in different ways to analyze fault currents in "sequence domain", which could then be used to compute phase currents. At work I was struggling to intuitively understand what contribution each of the three sequence currents had on the final phase currents. I came up with this tool to visualize what was happening. This project assumes some understanding of symmetrical components and phasors.
