CONVERTER FOR FORMING THE NEUTRAL IN AN ISLANDED SPLIT-PHASE POWER SYSTEM

A neutral forming converter provides a center point neutral reference when a single-phase power source supplies power to a load center in a split-phase power system islanded from the electrical grid. When a load center is islanded and the center-tapped utility transformer cannot provide a neutral reference, a single-phase power source such as a bidirectional electric vehicle charger can supply power to the load center but will require a neutral reference for loads that operate on only half the line-to-line voltage. Without a neutral reference, loads with different impedances can cause the single-phase power system to become unbalanced. The neutral forming converter connects circuitry forming a neutral reference node between the two line voltages of the single-phase power supply. The converter actively balances the voltage between the loads connected across Line 1 and the neutral reference and that between the loads connected across Line 2 and the neutral reference.