Topology and control of a two-phase residential PV system with load compensation capability

This paper describes the topology and control scheme of a photovoltaic system for two-phase three-wire residential consumers. The system is composed basically of a photovoltaic array, dc-link and a grid-interface three-phase voltage sourced converter. The paper describes in detail how this system can work in an installation that uses two-phases and neutral derived from a three-phase distribution system. The incremental conductance technique is used to track the maximum power point. All generated power is used to feed the load or injected to the grid. Simultaneously to active power injection, the interface converter is also controlled to perform reactive power and current harmonics compensation. A single-phase instantaneous powers technique is used to obtain reference currents. A predictive controller used to generate converter switching signals is described as well. Simulation results are presented to confirm the suitability of the proposed topology and control scheme.