Patents by Inventor YASHOMANI KOLHATKAR
YASHOMANI KOLHATKAR has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10784689Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The electrical power system further includes a subsystem breaker configured with each of the electrical power subsystems, and a cluster transformer for connecting each cluster of electrical power subsystems to the power grid. The electrical power system further includes a cluster power path extending between each subsystem breaker and the cluster transformer, and a distortion filter electrically coupled to the cluster transformer. The distortion filter reduces harmonics in current flowing from the electrical power subsystems to the cluster transformer.Type: GrantFiled: May 8, 2017Date of Patent: September 22, 2020Assignee: General Electric CompanyInventors: Govardhan Ganireddy, Saurabh Shukla, Rajni Burra, Robert Gregory Wagoner, Anthony Michael Klodowski, Yashomani Kolhatkar
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Patent number: 10784685Abstract: An electrical power subsystem includes a generator comprising a generator stator and a generator rotor, and a power converter electrically coupled to the generator. The power converter includes a plurality of rotor-side converters electrically coupled in parallel, a line-side converter, and a regulated DC link electrically coupling the plurality of rotor-side converters and the line-side converter. The electrical power subsystem further includes a stator power path for providing power from the generator stator to the power grid, and a converter power path for providing power from the generator rotor through the power converter to the power grid.Type: GrantFiled: May 8, 2017Date of Patent: September 22, 2020Assignee: General Electric CompanyInventors: Govardhan Ganireddy, Saurabh Shukla, Sumeet Singh Thakur, Robert Gregory Wagoner, Anthony Michael Klodowski, Yashomani Kolhatkar
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Patent number: 10243352Abstract: The present disclosure is directed to a protection system for a wind turbine power system connected to a power grid. The protection system includes a main brake circuit having at least one brake resistive element and at least one brake switch element, a battery system, and a controller. The brake resistive element is coupled to at least one of a DC link of a power converter of the wind turbine power system, windings of a rotor of the generator, or windings of a stator of a generator of the wind turbine power system via the brake switch element. The battery system is coupled to the generator via a battery switch element. In addition, the controller is configured to disconnect the power converter and the generator from the power grid and connect at least one of the main brake circuit or the battery system to the generator in response to detecting an electromagnetic (EM) torque loss event so as to generate an EM torque.Type: GrantFiled: July 29, 2016Date of Patent: March 26, 2019Assignee: General Electric CompanyInventors: Robert Gregory Wagoner, Govardhan Ganireddy, Yashomani Kolhatkar
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Publication number: 20180323619Abstract: An electrical power subsystem includes a generator comprising a generator stator and a generator rotor, and a power converter electrically coupled to the generator. The power converter includes a plurality of rotor-side converters electrically coupled in parallel, a line-side converter, and a regulated DC link electrically coupling the plurality of rotor-side converters and the line-side converter. The electrical power subsystem further includes a stator power path for providing power from the generator stator to the power grid, and a converter power path for providing power from the generator rotor through the power converter to the power grid.Type: ApplicationFiled: May 8, 2017Publication date: November 8, 2018Inventors: Govardhan Ganireddy, Saurabh Shukla, Sumeet Singh Thakur, Robert Gregory Wagoner, Anthony Michael Klodowski, Yashomani Kolhatkar
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Publication number: 20180323620Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The electrical power system further includes a subsystem breaker configured with each of the electrical power subsystems, and a cluster transformer for connecting each cluster of electrical power subsystems to the power grid. The electrical power system further includes a cluster power path extending between each subsystem breaker and the cluster transformer, and a distortion filter electrically coupled to the cluster transformer. The distortion filter reduces harmonics in current flowing from the electrical power subsystems to the cluster transformer.Type: ApplicationFiled: May 8, 2017Publication date: November 8, 2018Inventors: Govardhan Ganireddy, Saurabh Shukla, Rajni Burra, Robert Gregory Wagoner, Anthony Michael Klodowski, Yashomani Kolhatkar
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Publication number: 20180034264Abstract: The present disclosure is directed to a protection system for a wind turbine power system connected to a power grid. The protection system includes a main brake circuit having at least one brake resistive element and at least one brake switch element, a battery system, and a controller. The brake resistive element is coupled to at least one of a DC link of a power converter of the wind turbine power system, windings of a rotor of the generator, or windings of a stator of a generator of the wind turbine power system via the brake switch element. The battery system is coupled to the generator via a battery switch element. In addition, the controller is configured to disconnect the power converter and the generator from the power grid and connect at least one of the main brake circuit or the battery system to the generator in response to detecting an electromagnetic (EM) torque loss event so as to generate an EM torque.Type: ApplicationFiled: July 29, 2016Publication date: February 1, 2018Inventors: Robert Gregory Wagoner, Govardhan Ganireddy, Yashomani Kolhatkar
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Patent number: 9882424Abstract: A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle is calculated relative to a common reference angle, and control operation of each UPS based on the respective calculated phase angles.Type: GrantFiled: February 21, 2014Date of Patent: January 30, 2018Assignee: General Electric CompanyInventors: Yashomani Kolhatkar, Pradeep Vijayan, Silvio Colombi, Rajendra Naik, Viswanathan Kanakasabai
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Patent number: 9705360Abstract: A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate an output voltage frequency for each UPS of the plurality of UPSs, and control operation of each UPS based on the respective calculated output voltage frequencies.Type: GrantFiled: June 17, 2014Date of Patent: July 11, 2017Assignee: General Electric CompanyInventors: Yashomani Kolhatkar, Rajendra Naik, Viswanathan Kanakasabai, Silvio Colombi
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Patent number: 9685820Abstract: A system is provided. The system includes a utility, a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs, the controller configured to determine a common reference angle while the utility is disconnected from at least one UPS of the plurality of UPSs, calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle for each UPS is calculated relative to the common reference angle, and control operation of each UPS based on the respective calculated phase angles.Type: GrantFiled: June 17, 2014Date of Patent: June 20, 2017Assignee: General Electric CompanyInventors: Yashomani Kolhatkar, Pradeep Vijayan, Viswanathan Kanakasabai, Silvio Colombi, Rajendra Naik, Prashanth Manikumar Chennamsetty
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Publication number: 20170155278Abstract: A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle is calculated relative to a common reference angle, and control operation of each UPS based on the respective calculated phase angles.Type: ApplicationFiled: February 21, 2014Publication date: June 1, 2017Applicant: General Electric CompanyInventors: YASHOMANI KOLHATKAR, Pradeep Vijayan, Silvio Colombi, Rajendra Naik, Viswanathan Kanakasabai
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Publication number: 20150263567Abstract: A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate an output voltage frequency for each UPS of the plurality of UPSs, and control operation of each UPS based on the respective calculated output voltage frequencies.Type: ApplicationFiled: June 17, 2014Publication date: September 17, 2015Inventors: Yashomani Kolhatkar, Rajendra Naik, Viswanathan Kanakasabai, Silvio Colombi
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Publication number: 20150263566Abstract: A system is provided. The system includes a utility, a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs, the controller configured to determine a common reference angle while the utility is disconnected from at least one UPS of the plurality of UPSs, calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle for each UPS is calculated relative to the common reference angle, and control operation of each UPS based on the respective calculated phase angles.Type: ApplicationFiled: June 17, 2014Publication date: September 17, 2015Inventors: Yashomani Kolhatkar, Pradeep Vijayan, Viswanathan Kanakasabai, Silvio Colombi, Rajendra Naik, Prashanth Manikumar Chennamsetty
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Publication number: 20150244210Abstract: A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle is calculated relative to a common reference angle, and control operation of each UPS based on the respective calculated phase angles.Type: ApplicationFiled: February 21, 2014Publication date: August 27, 2015Applicant: General Electric CompanyInventors: YASHOMANI KOLHATKAR, Pradeep Vijayan, Silvio Colombi, Rajendra Naik, Viswanathan Kanakasabai