Experience on 10kW grid-connecting solar power station

This paper researches the components and operations of a 10 kW grid-connecting photovoltaic power system and gives 2 whole year yield data and their analyses. The single phase transformerless grid-connecting inverter has two-stage structure, DC-DC and DC-AC, but often operates only with last DC-AC stage according to the panel string output voltage. Apparently, weather is the remarkable influence factor to yield, but other parameter settings can also do same business. The research shows the correlation. The power quality of inverter is analyzed, too.