The characteristics of higher harmonics in clustered PV systems

The PCS on the market approved by Japan Electrical Safety & Environment Technology Laboratory (JET) is satisfactory for the standards specified in the government's guideline of higher harmonics. So problems of higher harmonics are less serious than those of others in the present time. However the characteristics of higher harmonics are partially unknown if clustered PV systems are interconnected to the distribution line. In this research, higher harmonics voltage and higher harmonics current and phase are measured as for as 39 harmonics every one minute. We investigate quantity of generated higher harmonics and the transition. This investigation is carried out for PV-Systems made by main 4 manufacturers in Japan