Abstract:
The invention provides a method for fault location in a power transmission line. The method comprises obtaining (802) a plurality of parameters associated with travelling waves detected from measurements carried out at a first and second terminal. The plurality of parameters comprises arrival times of first and second peaks of the corresponding travelling waves, and rise times of the corresponding first peaks. The method also comprises identifying (804, 808) one of a first half, a second half, and a mid-point of the power transmission line, as having the fault, based on a comparison of the rise times. Accordingly, the fault location is estimated (806, 810, 812) with one or more of the arrival times of the first and second peaks of the corresponding travelling waves, propagation velocity of the travelling wave and line length.
Abstract:
A method and an apparatus for fault detection in a mixed configuration power transmission line (10) comprising a plurality of sections (11, 12, 13) arranged between one end (S1) of the transmission line (10) and the other end (S2) of the transmission line (10) and comprising at least one overhead line section (11, 13) and at least one cable section (12) are disclosed. Based on a comparison travelling wave voltage or current time derivatives at the one end (S1) and the other end (S2) of the power transmission line (10) with selected threshold values, it is determined if there is a fault occurring in at least one cable section (12) of the power transmission line (10). Embodiments of the present invention utilize amplification of travelling wave voltages and/or currents which may occur at junctions (14, 15) between a cable section (12) and an adjacent overhead line section (11, 13) in determining if the fault occurs in a cable section (12) of the power transmission line (10).
Abstract:
There is provided mechanisms for travelling wave protection of a transmission line. A method comprises acquiring information of both voltage and current polarities from two ends of a transmission line. The method comprises comparing the voltage and current polarities of both ends of the transmission line to each other. The method comprises making a trip decision based on the comparison.
Abstract:
A device includes a propulsion unit configured to move the device and a steering unit configured to control the direction of the device. The device also includes a power unit configured to provide power to the propulsion unit and a charging unit configured to use an electric field to provide electrical power to the power unit. The device further includes a first magnetic sensor configured to determine a vector of one or more magnetic fields and a processor communicatively coupled to the propulsion unit, the steering unit, the power unit, and the magnetic sensor. The processor is configured to receive, from the magnetic sensor, a time-varying signal indicative of a magnetic field and determine, based on the time-varying signal, that the magnetic field is associated with an electrical power transmission line. The processor is further configured to cause the steering unit to direct the device toward the electrical power transmission line.
Abstract:
Заявляемая группа изобретений относится к электроэнергетике и может быть использована для диагностики воздушных линий электропередач. Способ диагностики воздушных линий электропередач включает установку на грозозащитном тросе или силовом проводе устройства для диагностики воздушных линий электропередач, управление его движением, управление работой устройств контроля воздушных линий электропередач, получение, обработку и анализ данных, полученных ими. Причем размещение и управление движением устройства для диагностики осуществляют с помощью летательного аппарата вертолетного типа. Устройство для диагностики воздушных линий электропередач содержит систему управления, устройства контроля воздушных линий электропередач, систему привода, причем дополнительно содержит летательный аппарат вертолетного типа. Компонент устройства для диагностики воздушных линий электропередач содержит систему управления, устройства контроля воздушных линий электропередач, систему привода, при этом корпус дополнительно снабжен направляющими. Техническая задача, на решение которой направлены заявляемый способ и устройство для диагностики воздушных линий электропередач, расширение арсенала средств. Техническая задача, на решение которой направлен компонент заявляемого устройства, расширение арсенала средств, упрощение процесса установки устройства для диагностики воздушных линий электропередач на грозозащитном тросе или силовом проводе.
Abstract:
Embodiments of the present invention include systems, methods, computer-readable media, and computer programs to determine and locate one or more faults on a distribution network in a high resistivity area. Embodiments of the present invention include a plurality of open conductor devices positioned on lateral ends of a plurality of distribution transformers. Each of the plurality of open conductor devices are configured to, for example, determine abnormal voltage readings and communicate such readings to a master station over a GSM/ GPRS communication network. The master station, in accordance with embodiments of the present invention, is configured to determine or verify the presence of one or more faults on the distribution network and the location of the one or more faults.
Abstract:
An electrode line monitoring unit (10) for monitoring an electrode line (18) comprises: a communications device (14) including a transmitter (22) to transmit, in use, a signal; and a power supply (16) including a power extraction circuit for connection, in use, into the electrode line (18) such that a voltage drop (V) is generated across the power extraction circuit so as to provide a primary voltage source to power one or more other components (12, 14) of the electrode line monitoring unit (10), wherein the power extraction circuit includes at least one power electronic device (24) with a non-linear voltage-current characteristic.