Arvind Kumar Tiwari

US Patent:

20220349385, Nov 3, 2022

Filed:

Apr 29, 2021

Appl. No.:

17/244151

Inventors:

- Barcelona, ES
Rupam Mukherjee - Bangalore, IN
Jishnu Kavil Kambrath - Kannur, IN
Veena Padmarao - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Benjamin Simon Engels - Osnabrueck, DE
Norman Arnold Turnquist - Carlisle NY, US

International Classification:

F03D 17/00
F03D 15/00
F03D 7/04
H02P 9/10

Abstract:

A method for operating a generator of a wind turbine includes generating, via a controller, a time series of a plurality of operating signals of the generator. The method also includes applying at least one algorithm to the time series of the plurality of operating signals of the generator to generate a processed time series of the of the plurality of operating signals of the generator. Moreover, the method includes identifying, via the controller, patterns in the processed time series of the plurality of operating signals of the generator to identify one or more of at least one slip event occurring in the slip coupling or a surface health of the slip coupling. Further, the method includes implementing, via the controller, a control action when the at least one slip event occurring in the slip coupling is identified or the surface health of the slip coupling is indicative of degradation in the slip coupling.

US Patent:

20220321039, Oct 6, 2022

Filed:

Apr 5, 2021

Appl. No.:

17/221977

Inventors:

- Barcelona, ES
Kapil Jha - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Kum Kang Huh - Niskayuna NY, US
Robert Gregory Wagoner - Roanoke VA, US

International Classification:

H02P 9/00
H02P 9/02
H02K 7/18
G01R 31/52
G01R 31/12
G01R 27/18
G01R 25/00

Abstract:

A method for preventing damage in a bearing of a generator of an electrical power system includes monitoring one or more electrical signals of a power conversion assembly of the electrical power system. The method also includes estimating an impedance path of common mode current from a terminal to ground using the operating parameter(s) of the power conversion assembly. Further, the method includes determining a one or more magnitudes and/or a one or more phase angles of the impedance path at different frequencies, such a switching frequency and/or harmonics. Moreover, the method includes determining whether the impedance path is indicative of degradation in at least one of bearing insulation or a ground brush of the generator based on a change in the one or more magnitudes and/or the one or more phase angles. In addition, the method includes implementing a control action when the impedance path is indicative of degradation in the bearing insulation and/or the ground brush of the generator.

US Patent:

20220321040, Oct 6, 2022

Filed:

Apr 5, 2021

Appl. No.:

17/222008

Inventors:

- Barcelona, ES
Arvind Kumar Tiwari - Niskayuna NY, US
Shahid Ali - Bangalore, IN

International Classification:

H02P 9/00
H02P 9/02
H02K 7/18

Abstract:

A method for preventing damage in a bearing of a generator includes monitoring, via a controller, one or more electrical signals of the power conversion assembly. The method also includes converting the electricals signal(s) to a frequency domain. Further, the method includes extracting one or more spectral components in frequency bands of the frequency domain around one or more known characteristic frequencies of the bearing. Moreover, the method includes determining at least one characteristic of the spectral component(s) in the frequency bands. In addition, the method includes comparing the characteristic(s) of the spectral component(s) in the frequency bands to at least one baseline value. The method further includes generating a fault signal or a baseline signal for the bearing based on the comparison. In response to the fault signal being generated, the method includes implementing a control action.

US Patent:

20220294231, Sep 15, 2022

Filed:

Mar 10, 2022

Appl. No.:

17/691545

Inventors:

- Grenoble, FR
Raganathan RADHAKRISHNAN NAIR - Vadoddara, IN
Arvind Kumar TIWARI - Niskayuna NY, US
Santhosh Kumar C - Chennai, IN
José Luis FERRAL - Vaulnaveys le Haut, FR

International Classification:

H02J 3/46
H02J 3/32

Abstract:

The invention concerns a method for controlling a hybrid power generation plant comprising a plurality of power sources among a hydro plant, a solar plant and a battery storage system, said method comprising:

US Patent:

20220224264, Jul 14, 2022

Filed:

Jan 12, 2021

Appl. No.:

17/146549

Inventors:

- Barcelona, ES
Jishnu Kavil Kambrath - Kannur, IN
Kapil Jha - Bangalore, IN
Veena Padmarao - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Subbarao Tatikonda - Bangalore, IN

International Classification:

H02P 9/00
H02J 3/00
H02J 3/38
H02J 13/00
H02J 3/24
H02K 7/18
G05B 15/02

Abstract:

The system and method described herein provide grid-forming control of a power generating asset having a double-fed generator connected to a power grid. Accordingly, a stator-frequency error is determined for the generator. The components of the stator frequency error are identified as a torsional component corresponding to a drivetrain torsional vibration frequency and a stator component. Based on the stator component, a power output requirement for the generator is determined. This power output requirement is combined with the damping power command to develop a consolidated power requirement for the generator. Based on the consolidated power requirement, at least one control command for the generator is determined and an operating state of the generator is altered.

US Patent:

20220190602, Jun 16, 2022

Filed:

Dec 10, 2020

Appl. No.:

17/117472

Inventors:

- Barcelona, ES
Kapil Jha - Bangalore, IN
Veena Padmarao - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Subbarao Tatikonda - Bangalore, IN

International Classification:

H02J 3/38
H02K 7/18
H02P 9/00
H02P 27/06

Abstract:

A method for operating an asynchronous inverter-based resource connected to a power grid as a virtual synchronous machine to provide grid-forming control thereof includes receiving a frequency reference command and/or a voltage reference command. The method also includes determining at least one power reference signal for the inverter-based resource based on the frequency reference command and/or the voltage reference command. Further, the method includes generating at least one current vector using the power reference signal(s). Moreover, the method includes determining one or more voltage control commands for the inverter-based resource using the at least one current vector. In addition, the method includes controlling the inverter-based resource based on the one or more voltage control commands such that the inverter-based resource actively participates in controlling at least one of voltage and frequency at a point of interconnection between the inverter-based resource and the power grid in a closed loop manner.

US Patent:

20220190681, Jun 16, 2022

Filed:

Dec 10, 2020

Appl. No.:

17/117613

Inventors:

- Barcelona, ES
Kapil Jha - Bangalore, IN
Veena Padmarao - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Subbarao Tatikonda - Bangalore, IN
Werner Gerhard Barton - Rheine, DE

International Classification:

H02K 7/18
H02P 9/00
H02J 3/38
H02P 27/06

Abstract:

A method for controlling an inverter-based resource having an asynchronous machine connected to a power grid to provide grid-forming control of the inverter-based resource includes coupling at least one additional device to terminals of a first converter of the inverter-based resource. Further, the method includes emulating, via a controller, at least one of the at least one additional device or the first converter as a first virtual synchronous machine. Moreover, the method includes coordinating, via the controller, operation of the first virtual synchronous machine and a second converter of the inverter-based resource using a vector-control approach to control at least one of voltage and frequency at a point of interconnection between the inverter-based resource and the power grid in a closed loop manner.

US Patent:

20230110182, Apr 13, 2023

Filed:

Dec 14, 2022

Appl. No.:

18/081112

Inventors:

- Barcelona, ES
Jishnu Kavil Kambrath - Kannur, IN
Kapil Jha - Bangalore, IN
Veena Padmarao - Bangalore, IN
Arvind Kumar Tiwari - Niskayuna NY, US
Subbarao Tatikonda - Bangalore, IN

International Classification:

H02P 9/00
G05B 15/02
H02J 3/00
H02J 3/24
H02J 13/00
H02K 7/18
H02J 3/38

Abstract:

The system and method described herein provide grid-forming control of a power generating asset having a double-fed generator connected to a power grid. Accordingly, a stator-frequency error is determined for the generator. The components of the stator frequency error are identified as a torsional component corresponding to a drivetrain torsional vibration frequency and a stator component. Based on the stator component, a power output requirement for the generator is determined. This power output requirement is combined with the damping power command to develop a consolidated power requirement for the generator. Based on the consolidated power requirement, at least one control command for the generator is determined and an operating state of the generator is altered.