Abstract: A method and a system for locating a fault of a complex power line are provided. Several monitoring points on the complex power line can be obtained by providing several traveling wave head monitoring sensors on the complex power line. The complex power line is transformed into coordinates in conjunction with an arrival moment and a location corresponding to the monitoring points, thereby establishing a trunk line fault-locating equation related to a line location, the arrival moment, and a traveling wave propagation speed, from which a first fault point can thus be derived simply and quickly. If a fault point is located on a branch line, a branch line fault-locating equation is then established to derive a second fault point. Furthermore, the first fault point and the second fault point serve as a basis for deriving a target fault point of the complex power line.

Abstract: A target tracking method, including: acquiring a video stream of a preset acquisition region; performing target detection on tth video frame of the video stream, and determining a first candidate box of the candidate target in the tth video frame; ranking the candidate targets, according to a confidence of the candidate target and a first intersection over union between the first candidate boxes of respective candidate targets, and determining a candidate target in at least one matched rank; performing at least one matching on the candidate target in the at least one matched rank, respectively, according to a set of trackers of the video stream in (t?1)th state and a preset matching strategy, and determining a target tracking result of the tth video frame; and determining a tracking trajectory of the target in the video stream according to the target tracking results of the T video frames.

Abstract: The embodiments of the present invention disclose a line protection method and a related apparatus for a flexible grounding system of a power distribution network. The method comprises outputting a first compensation voltage by a voltage source of a flexible grounding device of each line of a target power distribution network in the case where a ground fault occurs in the target power distribution network; starting to calculate the zero-sequence impedance of each line in real time by the zero-sequence impedance protection device; after the first compensation voltage is output for a first output duration, outputting a second compensation voltage; calculating the zero-sequence impedance of each line in real time by the line zero-sequence impedance protection device; determining a fault line by the zero-sequence impedance protection device, and cutting off the fault line to isolate the ground fault after a trip for a preset time delay.

Abstract: A target tracking method, including: acquiring a video stream of a preset acquisition region; performing target detection on tth video frame of the video stream, and determining a first candidate box of the candidate target in the tth video frame; ranking the candidate targets, according to a confidence of the candidate target and a first intersection over union between the first candidate boxes of respective candidate targets, and determining a candidate target in at least one matched rank; performing at least one matching on the candidate target in the at least one matched rank, respectively, according to a set of trackers of the video stream in (t?1)th state and a preset matching strategy, and determining a target tracking result of the tth video frame; and determining a tracking trajectory of the target in the video stream according to the target tracking results of the T video frames.

Abstract: The embodiments of the present invention disclose a line protection method and a related apparatus for a flexible grounding system of a power distribution network. The method comprises outputting a first compensation voltage by a voltage source of a flexible grounding device of each line of a target power distribution network in the case where a ground fault occurs in the target power distribution network; starting to calculate the zero-sequence impedance of each line in real time by the zero-sequence impedance protection device; after the first compensation voltage is output for a first output duration, outputting a second compensation voltage; calculating the zero-sequence impedance of each line in real time by the line zero-sequence impedance protection device; determining a fault line by the zero-sequence impedance protection device, and cutting off the fault line to isolate the ground fault after a trip for a preset time delay.

Abstract: A method and a system for locating a fault of a complex power line are provided. Several monitoring points on the complex power line can be obtained by providing several traveling wave head monitoring sensors on the complex power line. The complex power line is transformed into coordinates in conjunction with an arrival moment and a location corresponding to the monitoring points, thereby establishing a trunk line fault-locating equation related to a line location, the arrival moment, and a traveling wave propagation speed, from which a first fault point can thus be derived simply and quickly. If a fault point is located on a branch line, a branch line fault-locating equation is then established to derive a second fault point. Furthermore, the first fault point and the second fault point serve as a basis for deriving a target fault point of the complex power line.

Abstract: The embodiments of the present invention disclose a method and a related device for locating a ring power network fault. The method comprises: expanding in each ring line segment with an arbitrary point as a coordinate origin in a ring power network to construct a plurality of reference coordinate systems; acquiring monitoring point coordinate information and wavehead arrival time information of each of the monitoring point positions; acquiring assumed fault point information; acquiring a traveling wave propagation speed; constructing a plurality of distributed fault location equation sets according to the monitoring point coordinate information, the wavehead arrival time information, the assumed fault point information and the traveling wave propagation speed in each of the reference coordinate systems; and determining an actual fault position according to a solution result of each of the distributed fault location equation sets and the assumed fault section.

Abstract: A user equipment (UE) configured to perform self-calibration. The UE includes a first radio configured to perform implicit beamforming and further configured to transmit and receive signals during the calibration procedure. The UE further includes a first plurality of antennas communicatively coupled to the first radio, a second radio configured to transmit and receive signals during the calibration procedure and at least one second antenna communicatively coupled to the second radio. The calibration procedure includes the second radio transmitting a tone signal over the calibration frequency and a first antenna of the first radio receiving the tone signal and a second antenna of the first radio receiving the tone signal.

Abstract: An automatic data acquisition system based on a low-insulation vibrating wire sensor is provided, including a power module and a data acquisition module, where the power module includes a storage battery, an external power supply, and a power management unit; the storage battery is connected to the data acquisition module; the power management unit is configured to: according to a working status of the system, selectively control a connection between the data acquisition module and the external power supply and control charging and discharging of the storage battery; the data acquisition module includes a channel switching circuit and a plurality of data acquisition channels, and each data acquisition channel corresponds to at least one vibrating wire sensor; and the channel switching circuit is configured to conduct time-division control on a connected status of the data acquisition channel, to obtain data acquired by the corresponding vibrating wire sensor.

Abstract: A user equipment (UE) configured to perform self-calibration. The UE includes a first radio configured to perform implicit beamforming and further configured to transmit and receive signals during the calibration procedure. The UE further includes a first plurality of antennas communicatively coupled to the first radio, a second radio configured to transmit and receive signals during the calibration procedure and at least one second antenna communicatively coupled to the second radio. The calibration procedure includes the second radio transmitting a tone signal over the calibration frequency and a first antenna of the first radio receiving the tone signal and a second antenna of the first radio receiving the tone signal.