39results about How to "Reduce the scope of failure" patented technology

The invention relates to a low-expense high-survivability PON protection structure, and belongs to the technical field of optical networks. A plurality of different functional units of logic decision, backup transmitting-receiving, protection path control, and the like are additionally arranged in an optical line terminal; the switching of an optical switch is confirmed by the logic decision unit according to received logic signals; protection wavelength of a faulty component is tuned by the backup transmit-receive unit to enable a WDM part to conduct switching operation just on the faulty component to realize low expense concentrated protection; a cross concentration line structure is adopted at a TDM part; quick distributed protection switching is realized when ONU detects fault. According to the invention, the number of components participating in the protection switching in the WDM/TDM-PON system is effectively decreased; influence range of the fault is reduced; protection resource expense on the fault is reduced; full protection to all optical fiber fault in the whole system is realized.

The invention relates to a method for testing the short circuit of a medium-voltage busbar of an EMU (electric multiple units) train. The method comprises the steps of (1) setting multiple auxiliary converters in the train, setting N coupling switches on the medium-voltage busbar, wherein the auxiliary converters are connected in parallel for output, the coupling switches are switched on in normalworking, and the medium-voltage busbar connects the whole train, (2) firstly confirming whether a short circuit fault is an auxiliary converter internal fault once the vehicle has the short circuit fault and reducing a fault range, (3) allowing a vehicle to start an external short-circuit test program if the auxiliary converter has no internal fault, switching off the N coupling switches, dividing the medium-voltage busbar into N+1 segments, and then inputting the auxiliary converters to judge a faulty busbar segment, and (4) switching off one or two adjacent coupling switches after confirming the faulty busbar segment, switching on coupling switches which are not adjacent to the faulty busbar segment to ensure the normal working of a medium-voltage load of a busbar segment which is not in short circuit. According to the method, a line fault point can be refined, the fault influence range is reduced, even the fault influence can be avoided, and the vehicle operation is maintained to the maximum extent.

The invention provides a data center power supply system, a power supply control method and device and a data center, and relates to the technical field of computers, in particular to the field of big data. According to the specific implementation scheme, the data center power supply system comprises a power supply module; the at least one server is connected to the output end; the energy storage module comprises a bidirectional direct-current converter, a battery pack loop and a battery management unit, a first side port of the bidirectional direct-current converter is connected with the output end of the power supply module, a second side port of the bidirectional direct-current converter is connected with the battery pack loop, and a control end of the bidirectional direct-current converter is connected with the battery management unit; and the battery management unit is used for controlling the current flowing directions of the first side port and the second side port of the bidirectional direct-current converter so as to charge the battery pack loop or enable the battery pack loop to discharge to the server. In the power supply system, the energy storage module is low in cost and flexible in configuration, and can meet the diversity requirements of the data center.

The embodiment of the invention discloses a buscouple protection method with an outgoing line reactor, and the method can achieve the separation of internal and external faults of a bus in buscouple segmented protection with the outgoing line reactor through setting a low-voltage locking quick break on a buscouple and a segmented circuit breaker, protects the quickness of buscouple protection through combining with conventional current protection, can quickly cut off a fault, and reduces the impact range of a fault. The method comprises the steps that a system is provided with a buscouple circuit breaker and/or the segmented circuit breaker; the buscouple circuit breaker and/or the segmented circuit breaker are/is arranged to have functions of low-voltage locking quick break and current protection; a current value of the buscouple circuit breaker and a voltage value of a bus where the buscouple circuit breaker is located are obtained; The current value is compared with a buscouple current set value and the voltage value is compared with a buscouple voltage set value, thereby obtaining a buscouple comparison result; and the buscouple protection is started according to a protection movement logic of the buscouple circuit breaker and the buscouple comparison result.

The invention discloses a grounding protection mode of a traction network of a DC power supply system with both positive and negative electrodes insulated, which is mainly generated by a negative ground single conduction device arranged between a negative electrode bus bar and a grounding bus bar of a traction substation as a positive electrode of the DC power supply system. In case of short-circuit fault of ground (overhead ground wire, through ground wire, vehicle shell or running rail, etc.), a short-circuit return path is provided, and the DC feeder protection action corresponding to the traction substation with current variation characteristics is used to realize selective tripping. The DC power supply system is mainly composed of a rectifier unit of a traction substation, a DC switchcabinet, a traction network positive and negative pole, a negative ground single conduction device, and the like. The grounding system comprises a grounding grid, a substation grounding bus bar, an overhead ground wire of an overhead contact network (a special rail return power supply system), a through ground wire (a medium-and low-speed maglev traction power supply system), a grounding flat steel, and other grounding conductors or reinforcing bars. The invention can realize selective tripping when the DC power supply system has a positive electrode ground short-circuit fault.

The invention discloses a cascade system capable of realizing automatic line bridging and a method. The cascade system comprises a central controller and a plurality of cascaded functional subunits, wherein each functional subunit comprises a micro-control module which is used for transmitting bridging control information when the result of the heartbeat detection of the environment monitoring board of the functional subunit of the level is abnormal; a drive module which is used for generating a bridging drive signal according to the received bridging control information transmitted by the micro-control module; and a line switching module which is used for bridging the functional subunit of the lower level with the functional subunit of the upper level or the central controller through a transmission line according to the bridging control signal transmitted by the drive module to realize the automatic bridging of the line. In the invention, through using the line switching module to bridge the functional subunit of the lower level with the central controller or the functional subunit of the upper level when the functional subunit of the level is failed, the range affected by the failure is reduced and the operation reliability of the system is improved.

The invention discloses power distribution network fault searching equipment which comprises a single chip microcomputer and peripheral system, a high-voltage pulse signal source main circuit and driving circuit and an S signal source main circuit and driving circuit. The power distribution network fault searching equipment is characterized in that the high-voltage pulse signal source main circuit and driving circuit and the S signal source main circuit and driving circuit are connected with the single chip microcomputer and peripheral system by electric conductors. The power distribution network fault searching equipment has the advantages that the power distribution network fault searching equipment is simple in structure, smart in design and convenient to use; high-voltage pulse methods and S injection methods are combined with one another, the traditional voltage and current point measurement methods can be replaced, accordingly, the power distribution network fault searching equipment is high in positioning speed, faults can be accurately positioned, line patrol can be omitted, the power distribution network line operation, maintenance and repair efficiency can be improved, and influence ranges of the faults can be narrowed.

The invention discloses a high-concurrency order processing method, which comprises the following steps that: an order creating module creates an order request and sends the order request to an application server with a corresponding code according to the code information of the order request; the application server carries out data preprocessing on the order request and sends the order request subjected to the data preprocessing to the business processing module; and the business processing module carries out business processing on the order request after data preprocessing, and feeds back aprocessing result to the application server. Meanwhile, the invention discloses a high-concurrency order processing system, and the system comprises an order creation module which is used for creatingan order request, and sending the order request to different application servers according to the coding information; the application server carries out data preprocessing on the order request; and the business processing module performs business processing on the order request and feeds back a business processing result. The invention also discloses the beneficial effects that the application server can process the corresponding order types respectively, so that the order processing efficiency is greatly improved.

The invention relates to a quick rush repair device for catastrophic failures of power communication transmission equipment. The quick rush repair device comprises a processor, a memory unit, a control system and a communication module, all of which are arranged in a housing, wherein the processor is connected with the memory unit, the control system and the communication module, respectively. The communication module is used for acquiring configuration parameters of transmission equipment in the power communication field; the processor is used for converting the configuration parameters into control commands which are stored in the memory unit; once the transmission equipment has a failure, idle transmission equipment is found out or new transmission equipment is established; then the control commands in the memory unit are distributed to the transmission equipment; consequently, rush repair for failures can be realized conveniently and quickly. The quick rush repair device is simple in structure, personnel investment can be reduced, failure processing duration can be shortened, the failure influence range can be reduced, and service restoration accuracy rate can be ensured.

The invention discloses an intelligent substation relay outlet clamping solving system and method in the technical field of intelligent substations. The method comprises the steps that a device which is prepared before operation is powered on and initialized; before responding to the control command of each processing board, monitoring whether each processing board is in normal communication; when any processing board is subjected to communication interruption, the control commands of the processing board with the communication interruption are all reset before the exit command is generated; in response to normal communication of any processing board, taking a control command issued by the processing board with normal communication; performing phase OR on the reset control commands and the taken control commands to generate outlet commands corresponding to outlets of the relays; and on-off of an outlet channel corresponding to the output plate is controlled based on the outlet order. According to the device, the fault influence range is reduced, and the problem that when only one processing board is abnormal, the other processing board of the device cannot be used for controlling an outlet channel of the output board, and then the function of the whole device is lost is solved.

The invention discloses a rapid target-scoring paper and a processing method thereof. The rapid target-scoring paper comprises a first main wire and a second main wire, first branched wires and secondbranched wires are separately connected to the first main wire and the second main wire, the first branched wires and the second branched wires are mutually arranged at intervals, the first branchedwires are connected through a first bus, and the second branched wires are connected through a second bus. The processing method of the rapid target-scoring paper comprises the following steps that two films separately as a first film and a second film are prepared, the first main wire, the first branched wires, the second main wire and the second branched wires are printed on the first film, insulating layers are separately printed on the first branched wires and the second branched wires, printing buses are printed on the insulating layers, and the second film covers and is bond on the firstfilm. According to the rapid target-scoring paper and the processing method thereof, the invalid range of the rapid target-scoring paper can be effectively reduced, and the detection capacity is improved.

The invention provides a method and a system for protecting subareas of direct-current (DC) power grids. The method comprises the steps of using DC protection units (RPUs) arranged on connecting lines of the DC power grids to collect fault protection information of a fault isolation device, and judging whether protection actions of the RPUs are started or not according to the fault protection information, so as to realize the subarea fault isolation among the DC power grids; using local measurement and protection units (LMPUs) arranged in the subareas of the DC power grids to judge whether protection actions of the LMPUs are started or not based on the fault protection information, so as to realize the fault isolation between the DC power grids and alternating current (AC) power grids. According to the method and the system, a layered and divisional DC power grid fault protection frame is adopted, and all LMPU systems are independent of one another, so that the coupling relationships between the LMPUs and between the LMPUs and the upper layer RPUs are fewer.

The invention provides a distributed locomotive electronic brake control system comprising a communication unit, a brake controller, a locomotive main control unit, a brake control cabinet and a brakedisplay unit, wherein the brake controller, the locomotive main control unit, the brake control cabinet and the brake display unit are connected through the communication unit. The brake control cabinet comprises a brake control unit, an electric air control unit, a valve driving mechanism and a brake executing mechanism; the brake control unit controls the valve driving mechanism according to control information of the brake controller, the locomotive main control unit and the brake display unit; and the electric air control unit controls the brake executing mechanism according to the control information of the brake controller, the locomotive main control unit and the brake display unit and data information of the brake executing mechanism. According to the invention, the integration level of the electronic brake control system and the range of fault influence are reduced, the complexity of the system is reduced, the maintenance is convenient, and the reliability of the electronic control system is improved.

The invention discloses a microelectronic control-based portable automatic positioning device for an electronic circuit fault. The microelectronic control-based portable automatic positioning device for the electronic circuit fault comprises a shell, wherein a wire clamping post is fixedly arranged at the right side of the shell, and the inner side of the wire clamping post is connected with a spiral wire in a sleeving manner; a clamping rod is fixedly arranged at the left side of the spiral wire, and a spherical clamping block is integrally arranged at the left side of the clamping rod; a chuck is clamped at the left side of the spherical clamping block, and a top cover is arranged at the upper end of the shell; a microelectronic controller is arranged on the top cover. The microelectronic control-based portable automatic positioning device for the electronic circuit fault provided by the invention has the advantages of clever design, reduced production cost, convenient use for people, combination of a high pressure pulse method and an S injection method, high positioning speed, more accurate positioning, no need for line patrol, narrowing in fault incidence range, and fingerprint identification by using various integrated circuit modules based on a microelectronic technology, so that the microelectronic control-based portable automatic positioning device for the electronic circuit fault is safer and prevented from being stolen.

The invention provides a through flexible traction substation based on an existing traction transformer and a protection configuration method of the through flexible traction substation. Comprising an existing traction transformer, a matching transformer, a three-phase-single-phase converter and a plurality of circuit breakers. The through flexible traction substation can return to an existing power supply mode when the three-phase-single-phase converter has a serious fault. According to the invention, the influence of the unbalanced secondary side voltage of the existing traction transformer on the three-phase-single-phase converter is reduced, and meanwhile, the power supply reliability of the power supply interval of the through flexible traction substation is improved. According to the invention, negative sequence over-current protection is added in matching transformer protection, so that the safety of the transformer in an asymmetric fault is improved; and a reconfiguration switch is arranged at the output side of the power module of the three-phase-single-phase converter of the flexible traction substation, so that when the module has a non-short-circuit fault, the self-healing reconfiguration of the converter can be realized through the driving pulse blocking and reconfiguration switch, and the safe and reliable operation of the flexible traction substation is realized.

The invention discloses a partition-based application disaster tolerance system. The system comprises a product business layer, a middle platform service layer and a global support layer, wherein eachof the product business layer and the middle platform service layer comprises at least one business exclusive partition, a plurality of partitions of each business exclusive partition comprise a first partition and a second partition which are backed up mutually, and the global support layer is used for providing auxiliary support; the product business layer, the middle station service layer andthe global support layer perform business isolation and layering through partition middleware. By means of the technical scheme, resource isolation can be achieved, the fault influence range is narrowed, the positioning problem is clear, resource allocation is accurate, and elastic telescoping is convenient.

The invention discloses a wireless shunting locomotive signal and monitoring system maintenance management method. An analysis center is remotely connected with each station locomotive device in a wireless shunting locomotive signal and monitoring system by utilizing an existing microcomputer monitoring network channel; and the analysis center performs maintenance management on each station locomotive device. The method comprises the steps of monitoring a running state of each station locomotive device, and when an alarm signal sent by a station locomotive device is received, backing up important data of the corresponding station locomotive device; and querying related data of the specified station locomotive device through an online query instruction, obtaining historical record data meeting a retrieval condition and called by each station locomotive device by sending a retrieval instruction to each station locomotive device, and assessing a health state of each station locomotive device. The method can improve efficiency of device maintenance, upgrading and management, and ensure security application of the system on site.

The invention relates to the technical field of electric power systems, and discloses a line selection method and device for an AC/DC line contact fault, and a storage medium. The method comprises thesteps of: calculating a voltage component, a first current component and a second current component of each busbar in a multi-terminal DC transmission system, wherein the voltage component is a 50Hzcomponent of the voltage of the busbar, the first current component is the 50Hz component of the DC line current flowing into the busbar, and the second current component is the 50Hz component of theDC line current flowing out from the busbar; when the voltage component, the first current component and the second current component meet preset safety conditions, calculating a first power directionand a second power direction of the busbar according to the voltage component, the first current component and the second current component; and determining a DC line in which the AC/DC line contactfault occurs according to the first power direction and the second power direction of the busbar. By adopting the line selection method disclosed by the invention, accurate fault line selection can berealized, the power loss is reduced, and the influence range of the fault is reduced.