Test and study of utility interface and control problems for residential PV systems in Rokko Island 200 kW test facility

A 200 kW test facility comprising one hundred 2 kWp PV systems and a simulated utility grid was constructed to establish an adequate utility interface and control technology for small-scale dispersed PV systems. Experimental results are described. Demonstration experiments were performed, and the results show that the harmonic distortion in the distribution line was little influenced, and the problem of harmonics has been almost solved. It is confirmed that appropriate measures must be established for prevention of voltage variation in the low-voltage distribution line and for prevention of islanding during power outages. Solutions to these problems were also investigated using this facility.