System and Method for Controlling Outputs of Photovoltaic System
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsMouhacine Benosman, Chun Wei
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Abstract
A voltage at a point of common coupling (PCC) between a photovoltaic (PV) system and a power grid is regulated by a controller having a gain determined according to a gain function that is a function of a time. The gain function is determined based on an error between the voltage measured at the PCC and the reference voltage, and the gain is updated according to the updated gain function and a current instance of time. The controller generates a modulating signal using the updated gain and the voltage at the PCC is regulated according to the modulating signal.
Claims20
A voltage source converter (VSC) for regulating a voltage at a point of common coupling (PCC) between a photovoltaic (PV) system and a power grid, comprising:
- a circuitry to accept a reference voltage for the PCC and measurements of a voltage at the PCC;
- a controller including a processor to generate a modulating signal using at least one gain;
- an extremum seeking controller to determine the gain, wherein the extremum seeking controller
- determines a gain function based on an error between the voltage at the PCC and the reference voltage, wherein the gain function is a function of time;
- and
- updates a gain of the controller according to the gain function and a current instance of time;
- and
- an inverter to regulate the voltage at the PCC according to the modulating signal.
A method for regulating a voltage at a point of common coupling (PCC) between a photovoltaic (PV) system and a power grid, comprising:
- receiving a reference voltage for the PCC and measurements of a voltage at the PCC;
- determining a gain function based on an error between the voltage measured at the PCC and the reference voltage, wherein the gain function is a function of a time;
- updating a gain according to the updated gain function and a current instance of time;
- generating a modulating signal using the updated gain;
- and
- regulating the voltage at the PCC according to the modulating signal, wherein at least some steps of the method are performed using a processor.
A non-transitory computer readable storage medium embodied thereon a program executable by a processor for performing a method for regulating a voltage at a point of common coupling (PCC) between a photovoltaic (PV) system and a power grid, the method comprising:
- determining a gain function based on an error between a voltage measured at the PCC and a reference voltage for the PCC, wherein the gain function is a function of a time;
- updating a gain according to the updated gain function and a current instance of time;
- generating a modulating signal using the updated gain;
- and
- regulating the voltage at the PCC according to the modulating signal.
Dependencies are inferred from the claim text.