Abstract

This paper firstly analysis the principle of three-phased photovoltaic grid-connected power system. Secondly, the 20KW photovoltaic power system will be given as an example to introduce the design strategy of photovoltaic modules. Also, the photovoltaic grid-connected inverter is designed, which includes its parameters calculation and components selection. Finally, the whole photovoltaic power system is designed and verified via the experiment. The result of the experiment shows the design is reasonable and reliable. The power system can achieve full power operation and satisfy its expected goal.

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