Empirical test and evaluation of efficiency of string PV inverters

In this paper, a method of efficiency test and evaluation for string PV inverter in empirical testing platform is proposed. Based on the operating mechanism and efficiency empirical testing requirements of string PV inverter, the method of efficiency test for string PV inverter is researched, the device of efficiency test for string PV inverter is developed to test string PV inverter in empirical testing platform. Moreover, based on the method of efficiency evaluation in laboratory, the evaluation method of string PV inverter based on empirical test result is proposed through empirical test data analysis and processing. The experimental results verify the effectiveness of the method.