When there are AC overvoltages in on grid inverters, there are three situations: 01. The grid is too far away resulting in voltage rise. The distance between on grid inverter and on grid station is too far, which will lead to the increase of voltage difference at the AC terminal side of the inverters.
If the grid-connected inverter is too far away from the grid connection point, the voltage difference on the AC terminal side of the inverter will increase. When the inverter is connected to the grid-connected voltage range, the inverter will display the grid overvoltage.
This is because the grid voltage is not constant and it will change with the changing of the load and current. At the same time, the output voltage of the inverter will be affected by the grid voltage. When the grid encounters abnormal situation, the inverter power supply shall be stopped to avoid more serious damage on the grid.
According to relevant regulations, photovoltaic power generation on grid inverter must work within the specified grid voltage range, which can be monitored in real time and synchronized with the grid voltage.
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