Centralized inverter

The centralized inverter is generally used in the system of large photovoltaic power station (>10kW). Many parallel photovoltaic groups are connected to the DC input terminal of the same centralized inverter. Generally, three-phase IGBT power modules are used for large power, and field effect transistors are used for small power. At the same time, DSP conversion controllers are used to improve the quality of the generated power, making it very close to the sine wave current. The biggest feature of the system is high power and low cost. However, due to the matching of PV strings and partial shading, the efficiency and electrical capacity of the entire PV system are affected. At the same time, the power generation reliability of the entire photovoltaic system is affected by the poor working state of a photovoltaic unit group. The latest research direction is to use space vector modulation control and develop new topology connection of inverter to achieve high efficiency under partial load. On the SolarMax centralized inverter, a photovoltaic array interface box can be attached to monitor each string of photovoltaic panel strings. If one of the strings does not work properly, the system will send this information to the remote controller. At the same time, the string can be stopped through remote control, so that the work and energy output of the entire photovoltaic system will not be reduced or affected due to the failure of a string of photovoltaic panels.