What are the functions of the inverter?

The inverter not only has the function of direct-to-ac conversion, but also has the function of maximizing the function of the solar cell and the function of system fault maintenance. In summary, there are active operation and shutdown functions, maximum power tracking control function, independent operation prevention function (for grid-connected systems), active voltage adjustment function (for grid-connected systems), DC detection function (for grid-connected systems), DC grounding detection Function (for grid-connected system). Here is a brief introduction to the active operation and shutdown functions and the maximum power tracking control function.
1. Active operation and shutdown function: After sunrise in the morning, the solar radiation intensity gradually increases, and the output of the solar cell increases accordingly. When the output power required by the inverter task is reached, the inverter starts to operate actively. After entering operation, the inverter will take care of the output of the solar cell modules at all times. As long as the output power of the solar cell modules is greater than the output power required by the inverter task, the inverter will continue to run; The inverter can also operate on rainy days. When the output of the solar cell module becomes small and the output of the inverter is close to 0, the inverter becomes a standby mode.
2. Maximum power tracking control function: The output of the solar cell module changes with the intensity of solar radiation and the temperature of the solar cell module itself (chip temperature). In addition, because the solar cell module has the characteristic that the voltage decreases with the increase of the current, there is an optimal task point that can obtain the maximum power. The intensity of solar radiation is changing, and it is obvious that the optimal mission point is also changing. In relation to these changes, the mission point of the solar cell module has been kept at the maximum power point, and the system has been obtaining the maximum power output from the solar cell module. This kind of control is the maximum power tracking control. The biggest feature of the inverter used in the solar power generation system is that it includes the function of maximum power point tracking (MPPT).