Centralized inverter is generally used for large photovoltaic power plants In systems with a power output of>10kW, many parallel photovoltaic strings are connected to the DC input of the same centralized inverter. Generally, three-phase GBT power modules are used for high-power ones, and field-effect transistors are used for low-power ones. At the same time, DSP conversion controllers are used to improve the quality of the generated electricity, making it very close to sine wave current. The biggest characteristic of the system is high power and low cost. However, due to the matching of photovoltaic strings and partial shading, the entire system is affected The efficiency and electrical capacity of a photovoltaic system. At the same time, the power generation reliability of the entire photovoltaic system is affected by the poor working status of a certain photovoltaic unit group. The latest research direction is to use space vector modulation control and develop new topology connections for inverters to achieve high efficiency under partial load conditions. The inverter "is equipped with an interface box for attaching a photovoltaic array to monitor each string of photovoltaic panels. If one of the strings is not working properly, the system will transmit this information to the remote controller. At the same time, this string can be stopped through close range control, so that the failure of one string of photovoltaic panels will not reduce or affect the operation and energy output of the entire photovoltaic system.