公开(公告)号：US11588333B2

公开(公告)日：2023-02-21

申请号：US17739634

申请日：2022-05-09

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Abdel Rahman Khatib ,  Niannian Cai

IPC: H02J3/38 ,  H02J13/00 ,  H02J3/00 ,  G05B15/02 ,  H02J3/18

Abstract: A microgrid power flow monitoring and control system is described herein. The control system may determine active and reactive power sharing shortage on the electric power delivery system. The control system may utilize the control strategies of generation units, such as ISO control, droop control and constant power control to estimate power flow within a microgrid or other isolated system. A control strategy of one or more generators may be modified based on the determined power flow.

公开(公告)号：US20220393468A1

公开(公告)日：2022-12-08

申请号：US17329436

申请日：2021-05-25

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Niannian Cai ,  Abdel Rahman Khatib

IPC: H02J3/00 ,  H02J13/00 ,  H02J3/14 ,  G05B17/02

Abstract: An autonomous real-time remedial action scheme (RAS) control system may receive electrical measurements of a power system. The RAS control system may determine active power and reactive power of each bus in the power system based on the received electrical measurements. The RAS control system may dynamically determine whether to shed one or more loads, generators, or both in the power system by optimizing an objective function to maintain maximum critical load and maximum critical generation in the electrical system based on the active and reactive power of each bus in the power system and the generation of each generator in the power system. The RAS control system may send a command to trip at least one breaker to cause the at least one breaker to shed the one or more loads, generators, or both. The RAS control system may send a command to runback one or more generators.

公开(公告)号：US11009931B2

公开(公告)日：2021-05-18

申请号：US16284882

申请日：2019-02-25

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Abdel Rahman Khatib ,  Niannian Cai

IPC: G06F1/26 ,  H02J3/14 ,  H02J13/00 ,  H02J3/38 ,  G06F1/32 ,  G06F30/27 ,  G05B17/02 ,  G05B15/02

Abstract: The present disclosure relates to systems and methods of predicting voltages for various contingencies. For example, a monitoring system may include a processor that acquires at least one contingency of an electric power delivery system. The processor may acquire an expected control action based on the at least one contingency from controllers/IEDs. The processor may predict a voltage of at least one bus of the electric power delivery system by simulating the change in the state of the electric power delivery system caused by the expected control action. The processor may determine that the voltage of the at least one bus is predicted to violate one or more operational settings of the electric power delivery system if the at least one contingency were to occur. The processor may provide an indication that the voltage violates the one or more operational settings on a display of the electronic device.

公开(公告)号：US10992134B2

公开(公告)日：2021-04-27

申请号：US16409486

申请日：2019-05-10

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Niannian Cai ,  Abdel Rahman Khatib ,  Niraj Kiritkumar Shah

IPC: H02J3/14 ,  G05F1/70 ,  H02J3/18 ,  H02J3/16

Abstract: The present disclosure relates to shedding loads based on perturbation of active power and perturbation of reactive power. For instance, a method includes receiving electrical measurements of a power system. The method includes detecting a contingency in the power system. The method includes determining perturbation of the active power and perturbation of reactive power in the power system based on the electrical measurements. The method includes shedding one or more loads of the power system due to the contingency based on the perturbation of the active power and the perturbation of reactive power.

公开(公告)号：US20180034317A1

公开(公告)日：2018-02-01

申请号：US15644323

申请日：2017-07-07

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Abdel Rahman Khatib ,  Niannian Cai

IPC: H02J13/00 ,  G05B15/02 ,  H02J3/18

Abstract: A microgrid power flow monitoring and control system is described herein. The control system may determine active and reactive power sharing shortage on the electric power delivery system. The control system may utilize the control strategies of generation units, such as ISO control, droop control and constant power control to estimate power flow within a microgrid or other isolated system. A control strategy of one or more generators may be modified based on the determined power flow.