Centralized inverter of solar inverter

Centralized inverters are generally used in large photovoltaic power station (> 10kW) systems. Many parallel photovoltaic strings are connected to the DC input of the same centralized inverter. Generally, three-phase IGBT power modules are used for high power. The smaller power uses a field effect transistor, and a DSP conversion controller is used to improve the quality of the generated power, making it very close to a sine wave current. The biggest feature is the high power and low cost of the system. However, due to the matching of photovoltaic strings and partial shading, it leads to the efficiency and electrical capacity of the entire photovoltaic system. At the same time, the power generation reliability of the entire photovoltaic system is affected by the poor working condition of a certain photovoltaic unit group. The latest research directions are the use of space vector modulation control and the development of new inverter topology connections to achieve high efficiency under partial load conditions. On the SolarMax centralized inverter, a photovoltaic array interface box can be attached to monitor each string of solar panel strings. If one of the strings is not working properly, the system will The information is transmitted to the remote controller, and at the same time, the string can be stopped by remote control, so that the failure of a string of photovoltaic strings will not reduce and affect the work and energy output of the entire photovoltaic system.