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公开(公告)号：US20180198394A1
公开(公告)日：2018-07-12
申请号：US15403773
申请日：2017-01-11
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla
IPC: H02P9/10
Abstract: A system includes an excitation system. The excitation system includes a memory that may store an adaptive power system stabilizer (PSS) system that may dynamically stabilize an operation of a generator system. The excitation system also includes a processor communicatively coupled to the memory that may selectively utilize the adaptive PSS system based upon a determination of whether one or more operational parameters of the generator system has met or exceeded a threshold value.
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公开(公告)号：US09906176B2
公开(公告)日：2018-02-27
申请号：US14731102
申请日：2015-06-04
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla
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.
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公开(公告)号：US12249921B2
公开(公告)日：2025-03-11
申请号：US18188548
申请日：2023-03-23
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , John Andrew Leonard
Abstract: A system, including: a plurality of load commutated inverters (LCIs) connected in parallel, wherein each LCI includes: a source bridge for converting an alternating current (AC) voltage to a direct current (DC) voltage, wherein the source bridge includes at least one current switching device; a load bridge for converting the DC voltage from the source bridge to a variable frequency AC voltage; and a DC link coupling the source bridge to the load bridge; wherein each LCI includes a respective current regulator for controlling the at least one current switching device in the source bridge of the LCI to generate a current in the DC link.
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公开(公告)号：US20180274383A1
公开(公告)日：2018-09-27
申请号：US15470271
申请日：2017-03-27
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , John Huey , Scott Szepek
CPC classification number: F01D15/10 , F01D21/003 , F05D2220/32 , F05D2270/061 , F05D2270/20 , F05D2270/3061 , F05D2270/31 , H02K7/1823 , H02P9/006 , H02P9/102 , H02P9/107 , H02P2101/00
Abstract: The disclosure relates to optimization of gas turbine power plant response during power system transients. In certain embodiments, systems, methods, and apparatus can control a power generating system by using the reactive components of the current and the reactive components of the voltage and the magnitude of the voltage at the generator terminals of a gas turbine generator system. In one embodiment, a system can identify a power system fault based on at least three conditions occurring for a specified duration and at substantially the same time: (1) an increase in the reactive current, (2) a decrease in the magnitude of the voltage, and (3) an increase in the reactive power. In one embodiment, a power system can further detect a remote breaker open (RBO) condition, and distinguish a RBO condition from a power system fault condition.
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公开(公告)号：US10084409B2
公开(公告)日：2018-09-25
申请号：US14288016
申请日：2014-05-27
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , Shashidhar Nibhanupudi
Abstract: A brushless synchronous machine with a limiter for main field voltage and a method of limiting main field voltage in a brushless synchronous machine are described. The machine includes a regulator to use a field current to excite main field windings and generate the main field voltage. The machine also includes a limiter to limit the field current to maintain the main field voltage corresponding to the field current below a limit based on a transfer function.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20170346430A1
公开(公告)日：2017-11-30
申请号：US15163451
申请日：2016-05-24
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , Scott William Szepek , Alexis Sesmat , Maxime Buquet
CPC classification number: H02P9/04 , F05D2220/762 , F05D2270/05 , H02J3/00 , H02J3/24 , H02K7/1823 , H02P2101/00
Abstract: A method may involve monitoring a first set of electrical properties associated with an electrical grid configured to couple to a generator and determining whether a transient event is present on the electrical grid based on the first set of electrical properties. The method may also involve determining a mechanical power present on a shaft of the generator based on a second set of electrical properties associated with the generator, the electrical grid, or both when the transient event is present and sending the mechanical power to a controller associated with a turbine configured to couple to the generator, wherein the controller is configured to adjust one or more operations of the turbine based on the mechanical power.
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公开(公告)号：US20230417842A1
公开(公告)日：2023-12-28
申请号：US17969634
申请日：2022-10-19
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , Malepati Bhavani Sankar , John A. Leonard , Sudeep Pathak
Abstract: A system, in one embodiment, may include a system includes a ground fault detection system. The ground fault detection system includes a linear filter configured to receive one or more signals from a static starter system during operations of the static starter system and to produce a linear filter output. The ground fault detection system further includes a rectifier configured to rectify the linear filter output and to produce a rectifier output, and a gain system configured to multiply the rectifier output by a factor to produce a gain output. The ground fault detection system additionally includes a fault indicator system configured to indicate a ground fault based on the gain output, wherein the ground fault detection system is configured to command an action based on the ground fault.
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公开(公告)号：US10914701B2
公开(公告)日：2021-02-09
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
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.
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9.发明授权公开(公告)号：US10739405B2
公开(公告)日：2020-08-11
申请号：US15471366
申请日：2017-03-28
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , James Jonathan Grant
IPC: G01R31/34 , H02P6/32 , H02K11/20 , H02P29/024 , H02P9/00
Abstract: Various embodiments include a system having: at least one computing device configured to monitor a dynamoelectric machine having a rotor including an exciter electrically coupled with a field winding, by performing actions including: obtaining measured data indicating a resistance of the field winding at a plurality of rotor angular positions while the rotor is rotating at a speed below one-hundred revolutions per minute; comparing the measured data indicating the resistance of the field winding at the plurality of rotor angular positions with a threshold resistance range; and indicating a potential fault in the field winding in response to determining the measured data indicating the resistance deviates from the threshold resistance range.
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公开(公告)号：US10337348B2
公开(公告)日：2019-07-02
申请号：US15470271
申请日：2017-03-27
Applicant: General Electric Company
Inventor： Sreedhar Desabhatla , John Huey , Scott Szepek
Abstract: The disclosure relates to optimization of gas turbine power plant response during power system transients. In certain embodiments, systems, methods, and apparatus can control a power generating system by using the reactive components of the current and the reactive components of the voltage and the magnitude of the voltage at the generator terminals of a gas turbine generator system. In one embodiment, a system can identify a power system fault based on at least three conditions occurring for a specified duration and at substantially the same time: (1) an increase in the reactive current, (2) a decrease in the magnitude of the voltage, and (3) an increase in the reactive power. In one embodiment, a power system can further detect a remote breaker open (RBO) condition, and distinguish a RBO condition from a power system fault condition.
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