-
公开(公告)号：US20220413026A1
公开(公告)日：2022-12-29
申请号：US17897799
申请日：2022-08-29
申请人： Mahdi Davarpanah , Hamed Morsali
发明人： Mahdi Davarpanah , Hamed Morsali
摘要： A method for impedance measurement of coupled AC transmission lines. The method includes measuring a zero-sequence impedance of a three-phase transmission line that are configured to transmit electric power from a first substation of a power system to a second substation of the power system. Measuring the zero-sequence impedance includes disconnecting the three-phase transmission line from the power system, connecting a receiving end of the first three-phase transmission line to a local ground, connecting each phase of the three-phase transmission line at a sending end of the three-phase transmission line to a terminal node, measuring a zero-sequence current of the first three-phase transmission line, measuring a zero-sequence voltage of the three-phase transmission line, and calculating the zero-sequence impedance based on the zero-sequence current and the zero-sequence voltage.
-
公开(公告)号：US11921170B2
公开(公告)日：2024-03-05
申请号：US17721893
申请日：2022-04-15
摘要： A method for protecting a low-voltage distribution network. The low-voltage distribution network includes a low-voltage side of a three-phase distribution transformer that is configured to supply electrical power to at least one single-phase load through a respective distribution line of a plurality of three-phase distribution lines distribution lines. The method includes measuring variations of a periodic neutral-to-ground voltage between a neutral terminal of the three-phase distribution transformer and a local ground node by sampling the variations at a sampling frequency, detecting a fault in the low-voltage power distribution network based on the variations of the periodic neutral-to-ground voltage, and disconnecting the low-voltage side from the low-voltage power distribution network responsive to the fault being detected.
-
公开(公告)号：US20220236339A1
公开(公告)日：2022-07-28
申请号：US17721893
申请日：2022-04-15
摘要： A method for protecting a low-voltage distribution network. The low-voltage distribution network includes a low-voltage side of a three-phase distribution transformer that is configured to supply electrical power to at least one single-phase load through a respective distribution line of a plurality of three-phase distribution lines distribution lines. The method includes measuring variations of a periodic neutral-to-ground voltage between a neutral terminal of the three-phase distribution transformer and a local ground node by sampling the variations at a sampling frequency, detecting a fault in the low-voltage power distribution network based on the variations of the periodic neutral-to-ground voltage, and disconnecting the low-voltage side from the low-voltage power distribution network responsive to the fault being detected.
-
-
搜索结果
3 条记录 (耗时 0.03 秒)
