Grid connected PV inverters lead to a local rise in system voltage. Therefore it is a good idea to compensate locally by injecting inductive reactive power into the grid. This means that the inverter should be able to behave like an inductor. This seems counterintuituve ati first, since we are used to capacitive compensation, but here the problem is reversed! A good idea to control the DPF of the inverter would be to monitor the voltage at the local bus. A rise in voltage should lead in production of more inductive reactive power. Another way, would be to follow regulations, such as has been set by the German BDEW. Careful! The total kVA capacity of the inverter must not be exceeded. Therefore, when prooducing reactive power, the active power must be derated.
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