On-grid inverters are generally divided into photovoltaic power generation on-grid inverters, wind power on-grid inverters, power equipment on-grid inverters and on-grid-connected inverters of other power generation equipment to generate . The biggest feature of the on-grid inverter is the high power and low cost of the system. On-grid inverters are generally used in systems for home-connected power generation systems and large-scale photovoltaic power plants. Many parallel PV strings inverters are connected to the DC input of the same centralized inverter. Generally, the three-phase power is used. The IGBT power module uses a small field-effect transistor with low power and uses a DSP conversion controller to improve the quality of the power produced, making it very close to the sinusoidal current.