Patents by Inventor Amol Rajaram Kolwalkar
Amol Rajaram Kolwalkar 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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Publication number: 20200328705Abstract: A power generation system is disclosed. The power generation system includes an engine coupled to a DFIG and a PV power source to supply a solar electrical power to the DFIG (108). The power generation system also includes a controller configured to operate the engine at a first operating speed corresponding to a first determined efficiency of the engine for a first desired level of an engine power in a first operating condition; or operate the engine at a second operating speed corresponding to a desired level of the second electrical power to be absorbed by a rotor winding and a second desired level of the engine power in a second operating condition, wherein the determined first efficiency is substantially close to a first maximum achievable efficiency of the engine. Method of operating the power generation system is also disclosed.Type: ApplicationFiled: June 16, 2017Publication date: October 15, 2020Inventors: Govardhan GANIREDDY, Amol Rajaram KOLWALKAR, Somakumar RAMACHANDRAPANICKER, Arvind Kumar TIWARI, Sharath Sridhar ARAMANEKOPPA, Subbarao TATIKONDA, Yashomani Y. KOLHATKAR
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Publication number: 20190214824Abstract: A power generation system is disclosed. The power generation system includes a doubly-fed induction generator (DFIG) coupled to a variable speed engine and a photo-voltaic (PV) power source. The DFIG includes a generator to generate a first electrical power based at least partially on an operating speed of the variable speed engine. The PV power source may supply a second electrical power to a Direct Current (DC) link between a rotor side converter and a line side converter of the DFIG. The generator and the line side converter are coupled to an electric grid and/or a local electrical load to supply the first electrical power and at least a portion of the second electrical power to the local electrical load.Type: ApplicationFiled: March 19, 2019Publication date: July 11, 2019Inventors: Amol Rajaram KOLWALKAR, Somakumar RAMACHANDRAPANICKER, Arvind Kumar TIWARI, Subbarao Tatikonda
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Patent number: 10079485Abstract: A power generation system is provided. The system includes a prime mover for transforming a first energy to a second energy. The system also includes an induction generator operatively coupled to the prime mover and configured to generate electrical power using the second energy. The system further includes an inverter electrically coupled to the induction generator for controlling a terminal voltage of the induction generator during a grid-loss condition. The system also includes a power dissipating device operatively coupled to the inverter for dissipating power generated by the induction generator during the grid-loss condition.Type: GrantFiled: October 21, 2015Date of Patent: September 18, 2018Assignee: General Electric CompanyInventors: Amol Rajaram Kolwalkar, Arvind Kumar Tiwari, Rajendra Naik, Sanjay Vijayaraghavan
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Publication number: 20180048157Abstract: A power generation system is disclosed. The power generation system includes a doubly-fed induction generator (DFIG) coupled to a variable speed engine and a photo-voltaic (PV) power source. The DFIG includes a generator to generate a first electrical power based at least partially on an operating speed of the variable speed engine. The PV power source may supply a second electrical power to a Direct Current (DC) link between a rotor side converter and a line side converter of the DFIG. The generator and the line side converter are coupled to an electric grid and/or a local electrical load to supply the first electrical power and at least a portion of the second electrical power to the local electrical load.Type: ApplicationFiled: August 15, 2016Publication date: February 15, 2018Inventors: Amol Rajaram Kolwalkar, Somakumar Ramachandrapanicker, Arvind Kumar Tiwari, Subbarao Tatikonda
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Patent number: 9759798Abstract: A calibration method for enhancing a measurement accuracy of one or more voltage sensing devices in presence of a plurality of conductors is provided. The method includes operatively coupling at least one voltage sensing device of the one or more voltage sensing devices to a respective conductor of the plurality of conductors and determining a sensed voltage value of the respective conductor using the at least one voltage sensing device The method further includes determining a calibration matrix having cross-coupling factors representative of cross-coupling between an antenna of the at least one voltage sensing device and other conductors of the plurality of conductors and determining a corrected voltage value of the respective conductor by deducting at least in part contributions of the cross-coupling from the sensed voltage value of the respective conductor using the calibration matrix.Type: GrantFiled: May 13, 2014Date of Patent: September 12, 2017Assignee: General Electric CompanyInventors: Amol Rajaram Kolwalkar, Sameer Dinkar Vartak, Arun Kumar Raghunathan, Abhijeet Arvind Kulkarni, Charles Brendan O'Sullivan
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Patent number: 9678115Abstract: A contactless voltage sensing device configured to measure a voltage value of a conductor is provided. The contactless voltage sensing device includes a first impedance element having a first impedance, where the first impedance element is configured to be operatively coupled to the conductor. Further, the contactless voltage sensing device includes an antenna operatively coupled to the first impedance element, a second impedance element having a second impedance, where the second impedance element is formed in part by the antenna and a parasitic impedance element, and where the parasitic impedance element includes a parasitic impedance, and measurement and communication circuitry coupled to the first impedance element to measure the voltage value of the conductor.Type: GrantFiled: May 13, 2014Date of Patent: June 13, 2017Assignee: General Electric CompanyInventors: Arun Kumar Raghunathan, Amol Rajaram Kolwalkar, Sameer Dinkar Vartak, Abhijeet Arvind Kulkarni, Charles Brendan O'Sullivan
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Publication number: 20160111872Abstract: A power generation system is provided. The system includes a prime mover for transforming a first energy to a second energy. The system also includes an induction generator operatively coupled to the prime mover and configured to generate electrical power using the second energy. The system further includes an inverter electrically coupled to the induction generator for controlling a terminal voltage of the induction generator during a grid-loss condition. The system also includes a power dissipating device operatively coupled to the inverter for dissipating power generated by the induction generator during the grid-loss condition.Type: ApplicationFiled: October 21, 2015Publication date: April 21, 2016Inventors: Amol Rajaram KOLWALKAR, Arvind Kumar TIWARI, Rajendra NAIK, Sanjay VIJAYARAGHAVAN
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Publication number: 20150331079Abstract: A calibration method for enhancing a measurement accuracy of one or more voltage sensing devices in presence of a plurality of conductors is provided. The method includes operatively coupling at least one voltage sensing device of the one or more voltage sensing devices to a respective conductor of the plurality of conductors and determining a sensed voltage value of the respective conductor using the at least one voltage sensing device The method further includes determining a calibration matrix having cross-coupling factors representative of cross-coupling between an antenna of the at least one voltage sensing device and other conductors of the plurality of conductors and determining a corrected voltage value of the respective conductor by deducting at least in part contributions of the cross-coupling from the sensed voltage value of the respective conductor using the calibration matrix.Type: ApplicationFiled: May 13, 2014Publication date: November 19, 2015Applicant: General Electric CompanyInventors: Amol Rajaram Kolwalkar, Sameer Dinkar Vartak, Arun Kumar Raghunathan, Abhijeet Arvind Kulkarni, Charles Brendan O'Sullivan
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Publication number: 20150331017Abstract: A contactless voltage sensing device configured to measure a voltage value of a conductor is provided. The contactless voltage sensing device includes a first impedance element having a first impedance, where the first impedance element is configured to be operatively coupled to the conductor. Further, the contactless voltage sensing device includes an antenna operatively coupled to the first impedance element, a second impedance element having a second impedance, where the second impedance element is formed in part by the antenna and a parasitic impedance element, and where the parasitic impedance element includes a parasitic impedance, and measurement and communication circuitry coupled to the first impedance element to measure the voltage value of the conductor.Type: ApplicationFiled: May 13, 2014Publication date: November 19, 2015Applicant: General Electric CompanyInventors: Arun Kumar Raghunathan, Amol Rajaram Kolwalkar, Sameer Dinkar Vartak, Abhijeet Arvind Kulkarni, Charles Brendan O'Sullivan
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Patent number: 9178350Abstract: A system for distributing electrical current to a plurality of loads includes a first sensor coupled to an input of a protection zone for measuring a first current entering the protection zone, wherein the protection zone includes at least a portion of an electrical distribution feeder. The system also includes a second sensor coupled to an output of the protection zone for measuring a second current exiting the protection zone, and a processor coupled to the first sensor and to the second sensor. The processor is programmed to receive measurements representative of the first current and the second current, and calculate a reactive current differential of the protection zone based on the first current and the second current. The processor is also programmed to compare the reactive current differential with a fault threshold, and generate an error notification if the reactive current differential is greater than the fault threshold.Type: GrantFiled: November 30, 2011Date of Patent: November 3, 2015Assignee: General Electric CompanyInventors: Pan Yan, Reigh Allen Walling, Amol Rajaram Kolwalkar, Michael Lewis Reichard, Wei Ren, Swakshar Ray
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Publication number: 20150168465Abstract: A method of estimating a state of an electric power distribution system that includes a plurality of nodes and at least one electrical monitoring sensor includes measuring electric current flow (I), real power flow (P), and reactive power flow (Q). The method also includes determining estimated real power load values (PLis) and reactive power load values (QLis) and determining a plurality of estimated load current values (ILis) based on the PLis and the QLis. The method further includes measuring a value of voltage (VM) for at least one node and determining a voltage estimate (Vi) for the node. The method also includes comparing the Vi with the VM, thereby determining a difference value between the Vi and the VM. The method further includes determining that the difference value exceeds a threshold and adjusting the PLis and the QLis to match the Vi and the VM.Type: ApplicationFiled: December 13, 2013Publication date: June 18, 2015Applicant: General Electric CompanyInventors: Kasi Viswanadha Raju Gadiraju, Amol Rajaram Kolwalkar, Mallikarjuna R. Vallem
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Patent number: 9043040Abstract: A method of damping power system oscillations include obtaining a time synchronized damping control signal from a remote location and determining a communication time delay in receiving the time synchronized damping control signal from the remote location. The time synchronized damping control signal is then modified based on a phase compensation factor and an amplitude compensation factor determined from the time delay. Finally, a damping signal is generated based on the modified time synchronized damping control signal.Type: GrantFiled: January 31, 2012Date of Patent: May 26, 2015Assignee: General Electric CompanyInventors: Swakshar Ray, Mark Gerard Adamiak, Amol Rajaram Kolwalkar
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Patent number: 9006933Abstract: A method of damping power system oscillations includes obtaining an AC measurement signal from a power system location and determining oscillation frequency values in the AC measurement signal. A plurality of single signal components are extracted from the AC measurement signal by subtracting a plurality of processed measurement signals from the AC measurement signal and a damping signal is generated based on the plurality of single signal components. Each of the plurality of processed measurement signals are generated by time delaying the AC measurement signal with a time delay associated with each of the oscillation frequency values other than the oscillation frequency value of the single signal component to be extracted.Type: GrantFiled: October 21, 2011Date of Patent: April 14, 2015Assignee: General Electric CompanyInventors: Swakshar Ray, Amol Rajaram Kolwalkar
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Patent number: 8908343Abstract: An electric distribution system includes at least one feeder and a protection and control system. The feeder includes at least one segment including a first end and an opposing second end. The protection and control system includes a protective device and an electric current measuring device coupled to the segment proximate each end. The system further includes at least one processor coupled in communication with the electric current measuring devices. The at least one processor is programmed to determine a difference between a synchronized first electric current measured proximate the first end and a synchronized second electric current measured proximate the opposing second end and determine a switching condition of the protective devices as a function of the difference between the synchronized first and second electric currents.Type: GrantFiled: October 31, 2011Date of Patent: December 9, 2014Assignee: General Electric CompanyInventors: Yan Pan, Wei Ren, Swakshar Ray, Michael Reichard, Amol Rajaram Kolwalkar, Reigh Allen Walling
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Patent number: 8810233Abstract: A phase identification system includes a power distribution station and a phase detection device. The power distribution station includes a phase distortion device for generating voltage distortions of a known harmonic frequency in at least one of three phase voltage signals of the power distribution station. The phase detection is configured to receive at least one of distorted three phase voltage signals and to identify a phase of the received voltage signal. The phase detection device includes a delay circuit to generate a phase shifted voltage signal of the received voltage signal and a transformation module to transform the received voltage signal and the phase shifted voltage signal into d-q domain voltage signals of a known harmonic frequency reference frame. A phase determination module in the phase detection device determine the phase of the received voltage signal by comparing an amplitude of a harmonic of the known harmonic frequency in the received voltage signal with a threshold value.Type: GrantFiled: August 25, 2011Date of Patent: August 19, 2014Assignee: General Electric CompanyInventors: Prasad Kulkarni, Amol Rajaram Kolwalkar
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Patent number: 8766620Abstract: A phase identification system includes a power distribution station and a phase detection device. The power distribution station includes a phase distortion device for generating voltage distortions of a known harmonic frequency in at least one of three phase voltage signals of the power distribution station. The phase detection is configured to receive at least one of distorted three phase voltage signals and to identify a phase of the received voltage signal. The phase detection device includes a delay circuit to generate a phase shifted voltage signal of the received voltage signal and a transformation module to transform the received voltage signal and the phase shifted voltage signal into d-q domain voltage signals of a known harmonic frequency reference frame. A phase determination module in the phase detection device determine the phase of the received voltage signal by comparing an amplitude of a harmonic of the known harmonic frequency in the received voltage signal with a threshold value.Type: GrantFiled: August 25, 2011Date of Patent: July 1, 2014Assignee: General Electric CompanyInventors: Prasad Kulkarni, Amol Rajaram Kolwalkar
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Patent number: 8626462Abstract: A phase identification system is proposed. The system includes a sensor coupled to a terminal of a distribution transformer. A processor is coupled to the sensor for processing phase information of the terminal, wherein the sensor and the processor are embedded within a bushing unit on the distribution transformer. The processor is further configured to identify and display phase information at the distribution transformer.Type: GrantFiled: December 2, 2009Date of Patent: January 7, 2014Assignee: General Electric CompanyInventors: Amol Rajaram Kolwalkar, John Erik Hershey, Glen Peter Koste, Michael J Dell'Anno
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Publication number: 20130234680Abstract: A method for damping power oscillation in a power system includes generating synchronized generator speed signals by time stamping a plurality of generator speed signals. The synchronized speed signals are transmitted to a control station for determining power oscillations in the power system. The control station provides damping control signals to a plurality of damping devices based on power oscillations in the power system.Type: ApplicationFiled: March 8, 2013Publication date: September 12, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Amol Rajaram Kolwalkar, Rajni Kant Burra, Gurunath Gurrala
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Publication number: 20130197705Abstract: A method of damping power system oscillations include obtaining a time synchronized damping control signal from a remote location and determining a communication time delay in receiving the time synchronized damping control signal from the remote location. The time synchronized damping control signal is then modified based on a phase compensation factor and an amplitude compensation factor determined from the time delay. Finally, a damping signal is generated based on the modified time synchronized damping control signal.Type: ApplicationFiled: January 31, 2012Publication date: August 1, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Swakshar Ray, Mark Gerard Adamiak, Amol Rajaram Kolwalkar
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Publication number: 20130178998Abstract: A power distribution network system is provided. The system includes a plurality of metering devices configured to generate load side data, a plurality of processing subsystems that is in operational communication with at least one of the plurality of metering devices and a central processing subsystem, wherein the plurality of processing subsystems is configured to receive a subset of the load side data from at least one of the plurality of metering devices, receive supervisory controls and supervisory conditions from the central processing subsystem, determine whether one or more of the supervisory conditions are satisfied based upon the received subset of the load side data, and execute one or more of the supervisory controls based upon the determination whether one or more of the supervisory conditions are satisfied, wherein each of the plurality of processing subsystems is located at a load bifurcation point in the power distribution network.Type: ApplicationFiled: January 5, 2012Publication date: July 11, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Kasi Viswanadha Raju Gadiraju, Mallikarjuna Reddy Vallem, Amol Rajaram Kolwalkar, Gurunath Gurrala, Sanjay Verma