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公开(公告)号：US20210399545A1
公开(公告)日：2021-12-23
申请号：US17288640
申请日：2019-10-22
Applicant: ABB Power Grids Switzerland AG
Inventor： Obbalareddi Demudu Naidu , Preetham Venkat Yalla , Vedanta Pradhan , Nandkishor Kubal , Sachin Srivastava
Abstract: The invention relates to protection from faults in a power transmission system having two or more transmission lines. Travelling waves are detected from a signal obtained with a measurement equipment associated with a bus of the power transmission system. Arrival times of a first peak of a first travelling wave, a second travelling wave and a third travelling wave, are detected from the signal. A value for line length is calculated from the arrival times and propagation velocity of the travelling wave in the corresponding transmission line. The calculated value is compared with an actual length of the corresponding transmission line, for determining if the fault is an internal fault or an external fault. According to the fault being one of the internal fault and the external fault, a signal for controlling a switching device associated with the corresponding transmission line is generated.
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2.发明申请公开(公告)号：US20210003625A1
公开(公告)日：2021-01-07
申请号：US16764695
申请日：2018-06-14
Applicant: ABB Power Grids Switzerland AG
Inventor： Obbalareddi Demudu Naidu , Rahul Nandkumar Gore , Nandkishor Kubal
Abstract: A method can be used to determine a fault location in a power transmission line that connects a first terminal with a second terminal. Parameters associated with travelling waves are detected from measurements carried out at the first and second terminals. The parameters include arrival times of first and second peaks of the travelling waves at the first and second terminals respectively, and rise times of the first peaks of corresponding travelling waves. A first half, a second half, or a mid-point of the power transmission line is identified as having a fault based on the parameters. The fault location can be estimated based on the arrival times of the first and second peaks of the travelling waves detected from measurements carried out at the first and second terminals, a velocity of propagation of the travelling wave in the power transmission line, and/or a length of the power transmission line.
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公开(公告)号：US20210165032A1
公开(公告)日：2021-06-03
申请号：US16760843
申请日：2017-12-29
Applicant: ABB POWER GRIDS SWITZERLAND AG
Inventor： Obbalareddi Demudu Naido , Neethu George , Nandkishor Kubal
Abstract: A system can be used for analyzing fault data in a power transmission network with a plurality of power transmission lines. A number of power system devices are distributed across the power transmission network. Each power system device performs one or more of measurement of data to generate measured data and processing of the measured data to generate processed data in response to a condition in a corresponding segment of the power transmission network. The system includes a data aggregator, a data analyzer, and a fault locator.
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4.发明授权公开(公告)号：US11204382B2
公开(公告)日：2021-12-21
申请号：US16764695
申请日：2018-06-14
Applicant: ABB Power Grids Switzerland AG
Inventor： Obbalareddi Demudu Naidu , Rahul Nandkumar Gore , Nandkishor Kubal
Abstract: A method can be used to determine a fault location in a power transmission line that connects a first terminal with a second terminal. Parameters associated with travelling waves are detected from measurements carried out at the first and second terminals. The parameters include arrival times of first and second peaks of the travelling waves at the first and second terminals respectively, and rise times of the first peaks of corresponding travelling waves. A first half, a second half, or a mid-point of the power transmission line is identified as having a fault based on the parameters. The fault location can be estimated based on the arrival times of the first and second peaks of the travelling waves detected from measurements carried out at the first and second terminals, a velocity of propagation of the travelling wave in the power transmission line, and/or a length of the power transmission line.
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