7results about How to "Quick resection" patented technology

The utility model discloses an electric split-phase protection device for a contact network, and relates to the field of electrified railway traction power supply systems. The system is composed of a signal acquisition unit, an interphase fault identification unit, a fault removal unit, a power supply unit, a man-machine interface unit and an information interaction unit. An analog quantity acquisition circuit of the signal acquisition unit is connected with the interphase fault identification unit through a high-speed PCIE bus. The switching value acquisition circuit, the electric split-phase fault identification unit, the fault removal unit, the information interaction unit and the man-machine interface unit of the signal acquisition unit are connected together through the CAN bus, and the power supply unit supplies power to each unit through a device backboard power supply loop. The device is used for identifying and removing the phase-to-phase fault of the overhead line system, can improve the identification rate of the phase-to-phase fault, shortens the fault removal time, and achieves the quick removal of the fault, thereby avoiding the large-area power failure of a traction power supply system, and guaranteeing the normal operation of an electric locomotive.

The invention discloses a generator-transformer unit intelligent fault diagnosis and tripping control method, system and device based on double microcomputer protection and a storage medium, and relates to the technical field of generator-transformer unit microcomputer protection and intelligent control. Constructing a multi-dimensional non-electric quantity sensing system based on the standardized electric quantity data, performing synchronous alignment and logic fusion on electric quantity and non-electric quantity signals by using a communication model, and outputting a state data set; the method comprises the following steps: performing intelligent fault identification and self-adaptive criterion generation, determining fault types, ranges and confidence coefficients, calling the self-adaptive criterion to establish hierarchical tripping and delay control logic, mapping fault levels into quick-break, delay and trend three-level action channels, and performing multi-source criterion collaboration and shunt output control through an arbitration mechanism among double devices. According to the method, the threshold value and the time delay can be dynamically adjusted according to different operation conditions, and accurate judgment of the fault type, the fault range and the confidence coefficient is achieved.

The application discloses a kind of cascade utilization battery pack power energy storage system, including cascade battery module, basic energy storage unit, bidirectional DC / DC converter, DC bus, bidirectional DC / AC converter, sensor assembly, solid-state switch group and controller.The application compared with prior art has the advantages that a kind of cascade utilization battery pack power energy storage system, including cascade battery module, basic energy storage unit, bidirectional DC / DC converter, DC bus, bidirectional DC / AC converter, sensor assembly, solid-state switch group and controller;The cascade battery module is divided into A, B, C three grades by comprehensive health index evaluation, and the same grade 4 cascade battery modules are connected in series to form a basic energy storage unit;Each basic energy storage unit is connected to DC bus by independent bidirectional DC / DC converter, and DC bus is connected to power grid or load by bidirectional DC / AC converter;Each basic energy storage unit is equipped with sensor assembly and solid-state switch group, and can independently complete system access or cut-off.

The application discloses a kind of electric leakage protection device and rail transit power supply system, the device includes: multiple sets of electric leakage protection sub-device, it is set up one-to-one with the multiple traction substations of rail transit power supply system, it includes: ground leakage protection circuit, digital current selective trip protection circuit and switch, digital current selective trip protection circuit is connected with the corresponding switch by tail cable communication, and it is electrically connected with the corresponding ground leakage protection circuit by hard wire, for when receiving the electric leakage warning signal sent by corresponding ground leakage protection circuit, obtain and locate fault interval according to the current vector of all feeder loop inflow, outflow of the power supply interval to which itself belongs, and after positioning, remove fault interval. The switch between the two adjacent traction substations is connected by optical cable communication. Thus, the device can quickly and accurately remove the fault interval, reduce the power outage range, guide the maintenance personnel to carry out targeted maintenance, and maintain the continuity and stability of the power supply system.

The present application belongs to the technical field of electrified railway traction power supply, and particularly relates to a traction network multi-terminal longitudinal differential protection system and method under a double-sided through AT power supply mode. The system sets multi-terminal longitudinal differential protection elements according to uplink and downlink feeders, covers multi-terminal branches composed of traction substations, AT substations and partition substations, and each branch is configured with a current transformer. The protection element includes a power frequency variation current differential element, a T-line / F-line current differential element and a low-voltage differential current starting element, which are respectively adapted to fault transient and steady state characteristics, and realize rapid fault identification and accurate removal through cooperative action. The method combines current threshold criterion, voltage criterion and opposite side allowable signal to ensure the rapidity, selectivity, sensitivity and reliability of action, realize rapid removal of fault two-end power supply, reduce the fault isolation range, and ensure the safe and stable operation of the traction network.

The utility model discloses a steel strand girdling device, which relates to the technical field of cutting equipment and specifically comprises a sleeving part, an adjusting part, a handheld cutting machine and a mounting part, the adjusting part is mounted at the end part of the sleeving part, the handheld cutting machine is mounted on the sleeving part through the mounting part, and the handheld cutting machine is mounted on the mounting part through the mounting part. The sleeving part is arranged from the end of a steel strand needing to be annularly cut in a sleeving mode, the end of the adjusting part abuts against the end face of the steel strand, the depth, arranged on the steel strand in a sleeving mode, of the sleeving part is adjusted through the adjusting part, the output end of the handheld cutting machine acts on the periphery of the steel strand, and the steel strand is annularly cut by rotating the sleeving part and the handheld cutting machine. The girdling device is simple in structure, can quickly cut off the separated wires on the steel strand through the simple auxiliary sleeving part, and ensures the smoothness of a notch.

The utility model discloses a deflashing device for a rubber sealing ring, which relates to the technical field of sealing ring processing and comprises a base, an equipment shell is fixedly mounted on the base, a fixed rotating wheel is rotatably mounted on the equipment shell, a movable rotating wheel is movably mounted below the fixed rotating wheel, an O-shaped sealing ring is arranged between the fixed rotating wheel and the movable rotating wheel, and the O-shaped sealing ring is fixedly mounted on the base. A driving mechanism is fixedly installed on the equipment shell, the driving mechanism comprises a motor and a positioning sleeve which are fixedly installed on one side of the equipment shell, a driving shaft is fixedly installed at the output tail end of the motor, the tail end of the driving shaft is fixedly installed on a movable rotating wheel, and a cutting mechanism is installed on the equipment shell; the driving mechanism further comprises a driving lead screw rotationally installed in the positioning sleeve and a telescopic rod installed in the positioning sleeve in a sliding mode. According to the deflashing device for the rubber sealing ring, through cooperative use of the driving mechanism and the cutting mechanism, flashes on the inner side and the outer side of the sealing ring can be rapidly cut off.