Performance test and analysis of a PV power plant in Hami

Micro grid is a new kind of network structure consisting of various kinds of energy sources, and photovoltaic (PV) can be considered the most essential source because of the ubiquity, abundance and sustainability. To estimate the energy efficiency and quality of PV system is of great importance for improving the performance of micro grid. Performance ratio (PR) is a key technology parameter to estimate the PV system performance. A PV power plant in Hami of Sinkiang is the research object in this paper. Power degradation of PV modules, DC cable loss, the inverter efficiency and mismatch loss of PV strings are tested to analyze the major influencing factors of PV system energy loss. The test results are of great significance to reduce power loss and improve PR of PV system.