US Department of Energy directions in photovoltaic power conditioner development using smart power/power integrated circuit technologies

Photovoltaic (PV) power applications are currently concentrated in intermediate or residential size for utility-interactive, or small stand-alone modes of operation. Consequently, the development of low cost, highly efficient and reliable power conditioning subsystems (PCS) in the small to medium power range is critical for the viability of PV power systems as an alternative energy source. The paper summarizes US Department of Energy programmatic directions and development efforts in photovoltaic PCS designs. It describes new opportunities arising from increased availability and capabilities of semiconductor switching components such as smart power devices and power integrated circuits. The paper describes developmental efforts of manufacturers of these components and evaluates the synergistic impacts that will assist in new PCS development, and will accelerate PV power applications. It is found that the use of these technologies in future PCS designs offers significant promise of improved PCS reliability, cost and performance, thereby making PV AC power more competitive with utility power.