公开(公告)号：US20160357207A1

公开(公告)日：2016-12-08

申请号：US14731102

申请日：2015-06-04

Applicant: General Electric Company

Inventor： Sreedhar DESABHATLA

IPC: G05F1/66 ,  G05B13/02

CPC classification number: H02P9/10 ,  G05F1/66 ,  H02J3/1885 ,  H02K11/00

Abstract: A method keeps a synchronous machine in a stable operating zone during large transient voltage excursions on a power grid to which the machine is connected. The machine's load angle, i.e., the position of the rotor flux with respect to the position of the stator flux, is calculated. If the load angle is not within a defined range of reference values for stable machine operation, the machine's field excitation is adjusted to bring the machine's load angle within the defined range of reference values for stable machine operation.

Abstract translation: 一种方法是在机器连接的电网上的大瞬变电压偏移期间将同步电机保持在稳定的工作区域。 计算机器的负载角，即转子磁通相对于定子磁通位置的位置。 如果负载角度不在稳定的机器运行的参考值范围内，则机器的励磁电流被调整，以使机器的负载角度在规定的参考值范围内，以保证机器的运行。

公开(公告)号：US20170363559A1

公开(公告)日：2017-12-21

申请号：US15626708

申请日：2017-06-19

Applicant: General Electric Company

Inventor： Sunil UNNIKRISHNAN ,  Sreedhar DESABHATLA ,  Pradeep Kumar VAVILALA ,  Vamshi Krishna KANDULA

IPC: G01N27/20 ,  H02K11/20 ,  G01M15/14 ,  G01R23/16

CPC classification number: G01N27/20 ,  G01M15/14 ,  G01R23/16 ,  G01R31/34 ,  G01R31/343 ,  G01R31/346 ,  H02K11/20

Abstract: Embodiments of the disclosure are directed at determining rotor deterioration in a dynamoelectric machine. Various current and voltage measurements are carried out upon an exciter assembly when the dynamoelectric machine is operated at various speeds and at various occasions over an extended period of time. More particularly, a set of current and voltage measurements that are carried out when the dynamoelectric machine is in a slow-roll mode of operation can be used for determining a resistance of a current path through which the exciter assembly provides electrical power to a rotor assembly. A time-domain-to-frequency-domain conversion can be carried out upon this set of resistance measurements in order to generate a spectral signature. The spectral signature can then be evaluated to detect an altered rotor resistance condition and/or a rotor resistance alteration trend.

公开(公告)号：US20210281078A1

公开(公告)日：2021-09-09

申请号：US16809891

申请日：2020-03-05

Applicant: General Electric Company

Inventor： Sreedhar DESABHATLA ,  Scott William SZEPEK

IPC: H02J3/38 ,  G05B13/04 ,  F02C9/00 ,  F02C6/00

Abstract: This application provides methods and systems for rapid load support for grid frequency transient events. Example electric power systems may include a turbine, a generator coupled to the turbine, where the generator is configured to provide power to an electrical grid, and a controller configured to detect a grid event, determine a rate of change of frequency (rate of change of frequency) value, determine a predicted post-grid event governor set point based on the rate of change of frequency value, and initiate a change to at least one turbine operating parameter based on the predicted post-grid event governor set point.

公开(公告)号：US20210104965A1

公开(公告)日：2021-04-08

申请号：US16592205

申请日：2019-10-03

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Luis Fernando GUTIERREZ ,  John T. NGUYEN ,  Adnan Fareed ZAFAR ,  Yulimar ROA ,  Jose Carlos SANCHEZ ,  Juan Uziel MONTOYA ,  Sreedhar DESABHATLA ,  Stephen Roy BARTLETT ,  Maxime Buquet

IPC: H02P9/10 ,  F02C9/28 ,  F01D15/10 ,  H02P9/04

Abstract: This application provides methods and systems for rapid load support for grid frequency transient events. Example systems may include a turbine having a first controller, a generator coupled to the turbine, where the generator is configured to provide power to an electrical grid, and an exciter configured to provide a magnetic field in the generator. The exciter may include a second controller configured to monitor a first set of electrical properties associated with the electrical grid, determine that a transient event is present on the electrical grid based on the first set of electrical properties, and send a notification of the transient event to the first controller.

公开(公告)号：US20200096960A1

公开(公告)日：2020-03-26

申请号：US16615972

申请日：2017-05-23

Applicant: General Electric Company

Inventor： Ara PANOSYAN ,  Sreedhar DESABHATLA ,  Luca PAROLINI ,  Adolfo ANTA MARTINEZ ,  Naresh ACHARYA ,  Krishna Kumar ANAPARTHI ,  Scott William SZEPEK

IPC: G05B19/042 ,  H02J3/46 ,  H02J3/38

Abstract: An electric power system includes a generating unit, which includes a controller for controlling an operational mode of the generating unit. The electric power system also includes an event estimator communicatively coupled to the controller of the generating unit and a network estimator communicatively coupled to the event estimator. The network estimator includes a processor configured to receive status information associated with the electric power system, determine, based upon the status information, at least one characteristic of the electric power system, and transmit the at least one characteristic to the event estimator.