Systems and methods for solar photovoltaic energy collection and conversion

摘要

A circuit for an energy collection system is provided that includes one or more strings that are configured to couple to an electrical load. Each of the one or more strings comprises one or more string members that are coupled to each other in series. Each of the one or more string members comprises (i) a connection to receive an output from an energy output device, and (ii) an inverter configured to convert the output of the energy output device into alternating current (AC) energy. The circuit includes a controller that controls the output that is provided by the one or more strings by controlling the individual string member.

主权项

1. A circuit for an energy collection system comprising:
a string to couple to an electrical load, wherein the string comprises:
a plurality of string members coupled to each other in series,
wherein each string member of the string comprises (i) a connection to receive an output from an energy output device, (ii) an inverter configured to convert the output of the energy output device into an individual alternating current (AC) energy output, (iii) a control circuit configured to control one or more operations of the respective string member, and (iv) a voltage compensator,wherein one string member is a current administrator voltage compensator (CAVC), wherein the CAVC is configured to synthesize current and compensate string voltage to be adequately and sufficiently compatible with that of the load,wherein CAVC functionality is assigned to the string member based on a relative scale of strength (SoS) ranking of the plurality of string members based on at least one of input voltage and input power of each string member,wherein the CAVC controls and regulates string current and each of the other members of the string contributes a respective output voltage to the string commensurate with the input power of the respective string member,wherein the CAVC operates in a current control mode to administer the desired current through the string that is adjusted to achieve a predetermined optimal energy contribution to the string and generate a compensating output voltage that is a difference of the load voltage and a summation of voltages of the string members besides the CAVC,wherein the voltage compensator of each of the string members besides the CAVC adjusts a voltage of that string member to achieve the predetermined optimal energy contribution to the string,wherein the string produces a cumulative AC energy output that is provided to the electrical load.