Systems and methods for health monitoring and fault detection in power distribution networks are provided. Aspects include providing a first power supply coupled to a power channel, providing a load coupled to the power channel, providing a transmitting sensor coupled to the power channel between the first power supply and the load, providing a receiving sensor coupled to the power channel between the transmitting sensor and the load, operating the transmitting sensor to provide an AC test signal to the power channel, the AC test signal comprises a predefined test signal pattern, operating the receiving sensor to sense, from the power channel, a continuous power signal including the AC test signal, analyzing, by the controller, the AC test signal to determine a fault of the power channel based on comparing the predefined test signal pattern with a predefined nominal probe signal pattern corresponding to a specific network configuration.

A three-terminal power line fault location and correction system and method, and a computer readable storage medium. An electronic device is electrically connected with a plurality of terminal devices. When a fault occurs at a certain position of the power line, each terminal device detects the fault to generate a fault distance corresponding to the fault. The electronic device corrects the fault distance as follows: the corrected fault distance of one of the terminal devices=(an actual distance between the terminal device and a divergence point+a function of actual distances between the other two terminal devices and the divergence point)*the fault distance corresponding to the terminal device/(the fault distance corresponding to the terminal device+the fault distance corresponding to a function of the actual distances between the other two terminal devices and the divergence point).

A device (10) for detecting breakage of at least one electrical cable (12) has the at least one electrical cable (12), a wireless sensor (14) connected to the at least one electrical cable (12), and at least one power supply unit (18) supplying power to the wireless sensor (14). The at least one power supply unit (18) has a means (20) of applying a predetermined potential to the at least one electrical cable (12), and the wireless sensor (14) is designed to detect either the predetermined potential, which is an indicator of the integrity of the at least one electrical cable (12), or a floating potential, which is an indicator of the breakage of the at least one electrical cable (12).

The present disclosure discloses a single-phase fault arc detector. A fault arc signal processing circuit performs processing to obtain a voltage square wave signal, a voltage sine wave signal, a current sine wave signal, a current square wave signal, a current square shoulder pulse signal, and a current high-frequency pulse signal, and a processor accurately determines, on the basis of the plurality of obtained current signals and voltage signals and in combination with a preset operation rule, whether there is a single-phase fault arc in a power utilization line. Correlated characteristics of square shoulder parts may be accurately recognized by accurately extracting the current square shoulder pulse signal from current sampling signals; then, characteristics such as the number and durations of the square shoulder parts as well as current values may be comprehensively recognized on the basis of the current square shoulder pulse signal and the current high-frequency pulse signal.

A method determines a fault position on a line of a power supply network. Transient profiles of current and voltage values are measured at the line ends of the line and, by using the transient profiles, after the occurrence of a fault, a fault position is determined. To carry out fault location with high accuracy even in the case of a line having more than two line ends, transient profiles of a node current and a node voltage at a node point are determined by using the current and voltage values of a line end and a traveling wave model for the respective line section, and, for each line section, a two-sided fault position determination is carried out using the transient profile of the current and voltage values measured at its line end and, the node current and the node voltage and the traveling wave model for this line section.

A power cable includes a cable core, a jacket and an outermost semiconductor layer. The cable core includes at least one conductor, an insulating system thereof, and at least one metallic screen. The jacket surrounds the cable core and includes an inner jacket layer and an outer jacket layer. The outermost semiconducting layer surrounds the outer jacket layer in direct contact thereto. The power cable further includes a test semiconducting layer radially external to the inner jacket layer, radially internal to the outer jacket layer, and directly contacting them. A power cable system, and a jacket integrity testing method for a power cable, are also provided.

A defect detector can receives voltage data characterizing a three-phase voltage for each of a plurality of feeder lines. The defect detector generates an alert indicating that a potential defect exists at a switch upstream of the plurality of feeder lines in response to the voltage data indicating (i) a drop in two or more phases of voltage at a given feeder line of the plurality of feeder lines occurred within a predetermined amount of time of toggling of the switch or (ii) a drop in two or more phases of voltage on at least two or more feeder lines of the plurality of feeder lines has occurred.

A drone deployable power line fault detection sensor. The sensor can include a clamp mechanism having a clamp ring with first and second ring portions movably connected to each other and a resilient member positioned to urge the first and second ring portions toward a closed configuration. A latch can be positioned to retain the first and second ring portions in an open configuration whereby the sensor can be positioned on a power transmission line with a drone. A trigger can be coupled to the latch and operative, under the weight of the sensor, to disengage the latch thereby releasing the first and second ring portions to close around the transmission line under the force of the resilient member. One or more sensors are carried by the clamp mechanism and positioned to detect a line fault on the power transmission line, which is reported to a power station control system to de-energize the power transmission line.

Described are curve shapes that may be implemented in a transformer protector that provide enhanced fault protection. A transformer protector curve rating structure relates response curves to the transformer size and simplifies selection of response curves implemented within a transformer protector and associated transformer.

A live flaw detection system for a multi-bundled conductor splicing sleeve and an application method thereof are disclosed. The system includes an upper apparatus and a lower apparatus, where the upper apparatus includes an unmanned aerial vehicle and an industrial X-ray machine, and a laser sensor, and the lower apparatus includes a press plate frame apparatus, vertical screw slide table modules, a horizontal screw slide table module, a projection imager, and a linear retractable apparatus. The unmanned aerial vehicle functions as a power apparatus that controls the system to be online or offline, the industrial X-ray machine is configured to perform ray flaw detection on each splicing sleeve, the laser sensor is configured to guide the unmanned aerial vehicle to land the lower apparatus on splicing sleeves accurately, and the press plate frame apparatus is configured to fixedly clamp the splicing sleeves.