Adaptive controller for forced oscillation suppression in the grid
| DWPI Title: Control system for inverter based resource device in power system, has controller module that provides supervisory control of inverter-based resource device, and suppresses forced oscillation detected in power transfer function |
| Abstract: A control system and method for an inverter-based resource device provided in a synchronous power grid. The control system includes at least one inverter based resource device connected to an electrical power system, and a controller module. The inverter based resource device includes a reference power Pref, a combination module and a transfer function. The inverter based resource device injects modulated power into the power system. The power system (which is represented by a transfer function in the control system) receives an undesirable forced oscillation, which is connected to a measuring device. A controller module processes the measured output and provides a control signal to the inverter based resource device. The controller is arranged to suppress a forced oscillation detected in the power system. |
| Use: Control system for an inverter based resource device by an adaptive controller for forced oscillation suppression in a power grid of a power distribution grid. |
| Advantage: The system avoids a condition where unwanted oscillations are induced into the system if the forced oscillation detection fails, such as might occur with an open-loop design. The system automatically induces a second oscillation into the power grid, which cancels the impact of the force oscillation without the need for locating the source of the original forced oscillations. The control method identifies and adapts to changing forced oscillator frequency and continue suppression as the suppression frequency changes with time. |
| Novelty: The control system (10) comprises an inverter based resource device (12) connected to an electrical power system and a controller module. The inverter based resource device has a reference power, a combination module (13) and an inverter transfer function (15). The inverter based resource injecting power into the power system that has a power transfer function to receive a forced oscillation source. The power transfer function configured to generate an output. A controller module to provide supervisory control of the inverter based resource device. The controller module configured to suppress a forced oscillation detected in the power system transfer function. |
| Filed: 6/14/2021 |
| Application Number: US17346482A |
| Tech ID: SD 15265.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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