First, near the step-down transformer, in order to ensure that the voltage is normal in the place far away from the transformer, taking into account the line voltage loss, the transformer output voltage is generally raised; The second is that the user side of photovoltaic power generation can not digest, and the voltage should be increased to a far place, causing the inverter output side voltage to be too high, causing the inverter protection to shut down.
At this time, there are three ways to let the inverter continue to run: first, increase the output cable diameter, because the thicker the cable, the lower the impedance; Second, the mobile inverter is close to the merging point, the shorter the cable, the lower the impedance; The third is to manually adjust the inverter voltage range, but not too high, more than 270V May damage the user's other electrical equipment.
The high voltage of the inverter should be solved by increasing the capacity of the oscillation capacitor in the oscillation circuit. Because frequency is proportional to voltage, and frequency is inversely proportional to capacitance.