AUTOMATIC VOLTAGE REGULATION FOR PHOTOVOLTAIC SYSTEMS

摘要

A photovoltaic system includes solar cells and photovoltaic inverters configured to convert direct current generated by the solar cells to alternating current. Grid voltage at the point of interconnection (POI) of the photovoltaic system and the power grid is measured and compared to a setpoint. A control signal is generated based on the measured grid voltage. The control signal is provided to the photovoltaic inverters. The control signal is adjusted to cause the photovoltaic inverters to generate or absorb reactive power to respond to transient grid voltage changes.

主权项

1. A method of operating a photovoltaic system, the method comprising:
measuring a grid voltage delivered by a photovoltaic system at a point of interconnection (POI) with a power grid to generate a measured grid voltage; comparing the measured grid voltage to a reference voltage, the reference voltage indicating a setpoint voltage for the POI; generating a control signal based on a result of comparing the measured grid voltage to the reference voltage, the control signal indicating a reactive power setpoint for a photovoltaic inverter; and presenting the control signal to the photovoltaic inverter at the location of the photovoltaic inverter, the photovoltaic inverter converting direct current generated by solar cells to alternating current for delivery to the power grid; and adjusting the control signal to respond to transient changes to the grid voltage.