Systems and methods for voltage-based current limiting
AssigneeCummins Inc.
InventorsMichael James Scheuerell, Jordan Loos, Lane Woodland, Jeff Martin, Fei Gong, Mugdha S. Sane
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Abstract
A system and method of controlling voltage in a power system by automatically manipulating current with a power conversion device in response to a measured voltage value within the power system meeting or exceeding at least one predetermined threshold. The power conversion device may also automatically disconnect from the power system when the measured voltage value meets or exceeds an over-voltage protection threshold. Current manipulation and disconnect from the power system may occur without receiving a command from a supervisory controller.
Claims20
A system for limiting voltage, the system comprising:
- a power source configured to provide power to a power network of the system;
- a power conversion device connecting the power source to the power network;
- and
- a controller connected to the power conversion device and configured to transmit a current command to the power conversion device to maintain a steady current within the power conversion device;
- wherein the power conversion device is configured to override the current command received by the controller and automatically alter current within the power conversion device in response to a measured voltage of the power system meeting or exceeding a predetermined voltage threshold.
A power system, the power system comprising:
- a power source;
- a power network;
- and
- a power conversion device configured to connect the power source and the power network, the power conversion device having:
- a first state in which the power conversion device maintains a steady current;
- a second state in which a measured voltage meets or exceeds a first voltage threshold and the power conversion device increases current in response;
- and
- a third state in which the measured voltage meets or exceeds a second voltage threshold and the power conversion device decreases current in response.
A method for limiting voltage, the method comprising:
- measuring a change in voltage within a power system including a power conversion device;
- automatically increasing current using the power conversion device in response to a measured voltage meeting or exceeding a first threshold;
- automatically decreasing current using the power conversion device in response to the measured voltage meeting or exceeding a second threshold;
- and
- automatically disconnecting the power conversion device in response to the measured voltage meeting or exceeding a third threshold.
Dependencies are inferred from the claim text.