Decentralized Control of PV Inverter to Mitigate Voltage Rise in Resistive Feeder

Decentralized Control of PV Inverter to Mitigate Voltage Rise in Resistive Feeder

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Increasing installation of photovoltaic (PV) in the distribution power system has resulted in serious voltage rise, limiting grid-connectable power.This scenario becomes significant in the low-voltage resistive feeder.This paper proposes a decentralized control for distributed PV inverters to mitigate voltage rise.

Instead of MPPT (maximum power point tracking) mode, the proposed PV inverter is sequal eclipse 5 battery able to curtail its real power and compensate the reactive power according to the impedance at the installation location.The drooped characteristics between the output power and the impedance are developed so that the PV inverters are able to cooperatively suppress voltage rise based on their local voltage measurement only.Therefore, PV inverters are allowed to supply more power to the utility within voltage 12n/1200 wella limitation.

Simulations are conducted to guarantee the proposed control on improvement of voltage rise considering different parameter of feeder.A lab-scaled prototype circuit is established to verify effectiveness in a resistive feeder.