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US 2018/0123469 A1Published application
Remotely controllable modular power control device for power generation
AssigneeInternational Business Machines Corporation
InventorsJULIAN DE HOOG, SHIVKUMAR KALYANARAMAN, RAMACHANDRA KOLLURI
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Abstract
A power adjusting circuit includes a sensor configured to measure a voltage and a current of the first AC output by an inverter, an AC/DC/AC converter configured to receive the first AC output from the inverter, and a controller configured to convert the first AC output to a second AC output having a desired power factor.
Claims20
A method of adjusting power, the method comprising:
- measuring, by a sensor positioned at an output of an inverter, a voltage and a current of a first AC signal output by the inverter;
- in response to wireless receipt of a request signal including a first amount of desired active power and a second amount of desired reactive power, determining by a controller, a third amount of active power and a fourth amount of reactive power in the first AC signal from the measured voltage and current;
- determining, by the controller, an adjustment signal based on the first through fourth amounts;
- applying, by the controller, the adjustment signal to an AC/DC/AC converter connected to the output of the inverter to cause the AC/DC/AC converter to convert the first AC signal to a second AC signal having the first amount of the desired active power and the second amount of the desired reactive power,
- wherein the inverter comprises a DC/DC converter receiving an output of a photovoltaic array and a DC/AC converter receiving an output of the DC/DC converter.
2 more elements
A method of adjusting power, the method comprising:
- measuring, by a sensor positioned at an output of an inverter, a voltage and a current of a first AC signal output by the inverter;
- negotiating, between a first controller and a second controller, to determine first and second amounts of active power to provide, and third and fourth amounts of reactive power to provide;
- applying, by the first controller, a first adjustment signal to a first AC/DC/AC converter based on the first amount and the third amount, and applying, by the second controller, a second adjustment signal to a second AC/DC/AC converter based on the second amount and fourth amount, to cause the AC/DC/AC converters to collectively generate a second AC signal having a different power factor from the first AC signal,
- wherein the second AC signal has an amount of active power totaling the first and second amounts and an amount of reactive power totaling the third and fourth amounts,
- wherein the first AC/DC/AC converter is connected to the output of the inverter to receive the first AC signal output, and
- wherein the second AC/DC/AC converter is connected to the output of the inverter to receive the first AC signal and the second controller.
3 more elements
A method of adjusting power, the method comprising:
- measuring, by a sensor positioned at an output of an inverter, a voltage and a current of a first AC signal output by the inverter;
- notifying, by a central controller, a first controller of a first amount of power to provide and a second controller of a second amount of power to provide;
- applying, by the first controller, a first adjustment signal to a first AC/DC/AC converter based on the first amount, and applying, by the second controller a second adjustment signal to a second AC/DC converter based on the second amount, to cause the AC/DC/AC converters to collectively generate a second AC signal having a desired power factor different from the first AC signal,
- wherein the first AC/DC/AC converter is connected to an output of the inverter to receive the first AC signal output,
- wherein the second AC/DC/AC converter is connected to the output of the inverter to receive the first AC signal and the second controller, and
- wherein, periodically, the first controller applies the first adjustment signal to the first AC/DC/AC converter and the second controller applies the second adjustment signal to the second AC/DC/AC converter, to gradually produce the second AC signal having the desired power factor.
3 more elements
Dependencies are inferred from the claim text.