公开(公告)号：US20240275269A1

公开(公告)日：2024-08-15

申请号：US18639637

申请日：2024-04-18

Applicant: BATTELLE MEMORIAL INSTITUTE

Inventor： Wei Du ,  Sheik Mohammad Mohiuddin

IPC: H02M1/32 ,  H02M7/5395

CPC classification number: H02M1/32 ,  H02M7/5395

Abstract: This document describes systems and techniques for a control system for a grid-forming inverter. In aspects, a reactive power current-limiting subsystem, based on a measured reactive power, is configured to generate a first signal representing a magnitude of a modulation waveform presentable to a pulse-width modulator configured to direct transistors in the inverter of the grid-forming inverter. An active power current-limiting subsystem, based at least in part on a measured active power, is configured to generate a second signal representing a rotating phase angle of the modulation waveform presentable to the pulse-width modulator. The reactive power current-limiting subsystem and active power current-limiting subsystem are configured to cause an alternating current (AC) output of the grid-forming inverter to resume a nominal form subsequent to current being directed around one or more transistors in an inverter to prevent an excessive output current from flowing through the one or more transistors.

公开(公告)号：US20240195166A1

公开(公告)日：2024-06-13

申请号：US18537542

申请日：2023-12-12

Applicant: Battelle Memorial Institute

Inventor： Bhaskar Mitra ,  Nimat Shamim ,  Sheik Mohammad Mohiuddin ,  Manisha Maharjan ,  Ahmad Tbaileh ,  Quan H. Nguyen ,  Jinho Kim ,  Nader A. Samaan

IPC: H02H3/02 ,  H02H3/08

CPC classification number: H02H3/021 ,  H02H3/025 ,  H02H3/083

Abstract: Circuit breakers and associated methods are described. According to one aspect, a circuit breaker includes an input node configured to receive an AC waveform of electrical energy, an output node configured to output the AC waveform, mechanical breaker circuitry configured to selectively operate in a conductive state to conduct the AC waveform from the input node to the output node, switching circuitry configured to selectively operate in a conductive state to conduct the AC waveform from the input node to the output node, energy absorption circuitry coupled with the input node and the output node, wherein the mechanical breaker circuitry and the switching circuitry are changed from the conductive state to a non-conductive state after detection of a fault, and wherein the energy absorption circuitry is configured to dissipate electrical energy of the fault after the mechanical breaker circuitry and the switching circuitry are changed to the non-conductive state.

公开(公告)号：US20240079947A1

公开(公告)日：2024-03-07

申请号：US18241739

申请日：2023-09-01

Applicant: BATTELLE MEMORIAL INSTITUTE

Inventor： Wei Du ,  Yuan Liu ,  Quan Nguyen ,  Sheik Mohammad Mohiuddin

IPC: H02M1/00 ,  H02M1/32 ,  H02M7/5395

CPC classification number: H02M1/0019 ,  H02M1/0009 ,  H02M1/0012 ,  H02M1/32 ,  H02M7/5395

Abstract: This document describes systems and techniques for a current-limiting control strategy for single-loop droop-controlled grid-forming inverters. In aspects, a hysteresis module is configured to compare an output current detected across one or more transistors in an inverter controlled by the single-loop droop converter with a specified maximum current and to generate an overcurrent signal. The overcurrent signal presents a fault signal responsive to the output current exceeding the specified maximum current. A logic array is configured to logically combine gate control signals generated by the single-loop droop controller to selectively direct the one or more transistors to allow the output current to flow therethrough with the overcurrent signal to present modified gate control signals to the one or more transistors. The logic array is configured to replace one or more of the gate control signals in the modified gate control signals with a gate disable signal responsive to the overcurrent signal presenting the fault signal.