A Research of the String Inverter Grid-Connected Photovoltaic System Based on Intelligent Cluster Controller

摘要

Based on the design of intelligent cluster controllers, a high performance gird-connected photovoltaic power system of string inverters is developed in this paper. The system is consist of single phase gird-connected inverters, intelligent cluster controllers and friendly computer monitor software. With the optimal MPPT arithmetic by the forth-back voltage increment perturbation , the maximal power output of PV modules is realized. On the other hand, The cluster controller can monitor a maximum of 60 inverters in the locale of PV modules synchronously. The relevant verification has been carried using the experimental units, and the system possesses excellent capability of high efficiency, intelligent maintenance and integrated management.