186results about How to "Improve fault location efficiency" patented technology

The invention provides an on-line fault location device for a high-voltage power cable. The on-line fault location device comprises a first terminal and a second terminal which are respectively arranged at two ends of the high-voltage power cable and are in fiber connection with each other, as well as a data processing unit, wherein the first terminal is used for receiving fault generated traveling waves generated by a fault point and simultaneously sending a pulse signal to the second terminal; the second terminal is used for receiving the fault generated traveling waves generated by the fault point, as well as the pulse signal, and recording the time difference value between the fault generated traveling waves and the pulse signal; and the data processing unit is used for calculating the position of the fault point in the high-voltage power cable according to the time difference value. By adopting the technology provided by the invention, the high-voltage power cable can be monitored in a real time manner, and when the major insulation of the cable fails to work, reliable triggering of two-end timing equipment is realized by virtue of pulse waves which are generated at the fault point by the self energy of a power system, and analysis and calculation are carried out according to the timing data so as to acquire the position of the fault point in the high-voltage power cable, so that on-line monitoring and accurate location are achieved, the fault location efficiency is high and the fault location cost is low.

Disclosed in an embodiment of the present invention are a fault location method and device, the method comprising: extracting the alarm information of each device in a network, and establishing a correspondence between an alarm name and an alarm fault cause in the alarm information; according to a fault location target, merging and classifying the alarm fault causes to obtain a set of alarm fault causes; acquiring the alarm set of alarm data in a current network, and establishing a correspondence between the alarm set and the set of alarm fault causes, the alarm set comprising a set of alarm names; determining the probability of the fault cause occurrence corresponding to the alarm set in a preset time window, and selecting the probability of the fault cause occurrence satisfying a preset range as the fault cause of the alarm set; and hierarchically merging and classifying the fault causes of the alarm set to realize hierarchical locations of the fault causes. The embodiment of the present invention solves the technical problem in the prior art of inaccurate fault location and low location efficiency.

The invention provides a method for detecting ECMP (Equal-Cost Multi-path Routing). The method comprises the steps that a network detection device generates N detection messages which comprise same label stacks, TTL (time to live), source IP (Internet Protocol) addresses and destination IP addresses, and mutually different port groups, wherein the label stacks comprise M link labels, the value of the TTL is M+1, and the N is greater than or equal to equal-cost paths from a to-be-detected network node to the destination address; and the network detection device sends the N detection messages according to the link labels at the stack tops of the label stacks, receives N notification messages corresponding to the N detection messages and determines whether the ECMP function of the to-be-detected network node is accurate or not according to the N notification messages and a preset ratio range. A fault is positioned rapidly.

The invention discloses a network fault positioning method and a device. The method comprises steps of: dividing an original network domain into multiple sub network domains according to occurrence probability of different types of faults to a network node; acquiring history fault data in the network and obtaining a network fault positioning model through the neural network training; and acquiring information network fault data in the current network, inputting the information network fault data into the network fault positioning model and calculating to obtain communication network fault data so as to obtain a positioning result of the network faults. According to the invention, by considering dependency, between different layers, of the faults, the network domain with complex structure, high volume and many faults is divided into sub network domains with simplified structures, so more precise fault positioning can be performed; parallel positioning based on multiple sub network domains is performed, so fault positioning efficiency is improved; and by use of the neural network, the correlation between the network nodes is considered in the fault positioning, so accuracy of the network fault positioning is improved.

The invention discloses a power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors, comprising the steps of: utilizing a main station to collect the current spillage information of each feeder line switch of a power distribution network; setting a switch function set; building a power distribution network fault locating non-linear complementation optimization fault locating model; building a non-linear programming fault locating model meeting KKT extremum conditions; and utilizing a lagrangian multiplier and a continuous space non-linear optimization extremum theorem to obtain fault auxiliary fault factors, and realizing a fault locating and FTU defect diagnose fault locating non-linear equation set model. The method realizes single or multiple fault high fault-tolerance location on a power distribution network feeder line fault section, realizes latent defect FTU apparatus position accurate identification and large scale complex power distribution network on-line fault positioning, provides theoretical guidance for FTU apparatus state maintenance, and has the advantages of convenient implementation, high reliability, strong fault tolerance capability, high fault locating efficiency, great adaptability to multiple faults, etc.

The embodiment of the invention discloses a V x LAN detection method and device, which are applied to a transmission node; the detection method comprises the following steps: detecting a sent detection message; when the detection message is detected, copying the detection message to form a duplicate message; adding transmission information transmitted by the detection message to the transmission node in the duplicate message; sending the duplicate message added with the transmission information to a control node; and sending the detection message to a next transmission node. In the embodiment,the detection message is duplicated, and the transmission information is added in the duplicate message, so that the transmission condition of the detection message in the transmission node can be known after the control node receives the duplicate message; therefore, whether the transmission node causes a network abnormal fault point or not is positioned according to the transmission condition;simple network fault positioning is realized, the fault positioning efficiency is improved, and the recovery speed of network communication is improved.

The invention provides a contribution degree-based synchronous digital hierarchy (SDH) fault positioning method. The method is characterized by comprising steps: an alarm propagation model is constructed and an SDH alarm derivative tree is built; the contribution degree factor of each SDH alarm is calculated; fault reasons for each kind of SDH alarm data and times of the kind of SDH alarm caused by the reason are counted; the certainty factor of each kind of fault is calculated; the SDH contribution degree factors and the SDH fault certainty factors obtained after calculation are integrated to construct an SDH alarm fault reason list, and an SDH alarm rule knowledge base is constructed by the constructed SDH alarm fault reason list; and association model analysis is carried out, and SDH network fault positioning is carried out on the current SDH alarm. The method of the invention is based on the SDH fault positioning technology based on the contribution degree, faults of the topological complex SDH network can be positioned automatically, and the efficiency is higher on the basis of maintaining accuracy.

The invention discloses an IPTV (Internet Protocol Television) system fault location method and system. The method comprises the following steps: acquiring a fault tree corresponding to a fault phenomenon to be located, wherein in the fault tree of each fault phenomenon, the fault phenomenon is located at a root node of the fault tree, and multiple fault causes that may lead to the fault phenomenon are located in non root nodes of the fault tree respectively; and traversing the acquired fault tree, detecting the fault cause corresponding to each non root node, and locating the fault cause causing the fault phenomena to be located from the fault tree. According to the IPTV system fault location method and the system provided by the invention, the fault causes that lead to the fault phenomenon to be located are located by acquiring the fault tree corresponding to the fault phenomenon to be located, and traversing the fault tree and detecting the multiple fault causes, so that the fault location efficiency in the IPTV system is effectively improved.

The embodiment of the invention provides a method and device for transmitting fault messages, and relates to the field of communication. The method and device can improve network fault locating efficiency and reduce fault duration. The method comprises the steps that a label switching router is used for detecting links adjacent to the device, if the label switching router detects faults of the links, fault messages of the links are obtained, the fault messages comprise fault types, fault positions, fault channel types and fault channel identification messages, and alarming messages including the fault messages are sent to sink ends in the data traffic transmitting direction, so that the sink ends analyze the alarming messages to obtain the fault messages. The method and device are used for transmitting fault messages.

The invention discloses a method for positioning the faults of an embedding control path, which comprises the following steps that: a part with the highest packet loss rate is determined, a splitter is added on a cable between each two network elements, a receiving port of a reference network element which is determined to have no faults is connected, all the network elements and the receiving and sending packet values of a counter of the receiving and sending packets of a main control board of the reference network element which are corresponding to all the data paths in a link are taken as the original values; the both ends of the link are connected with data instruments with the functions of the receiving and sending packets for carrying out the two-way receiving and sending packets; a period of time of the receiving and sending packets is recorded, the receiving and sending packet values of all the data paths which are recorded by all the network elements and the main control board of the reference network element of the link are compared with the corresponding original values; and the faults of the embedding control path are positioned according to the comparison result. As the method adopts the main control board to record the number of the data packets which are generated in the packet sending process, the reference direction is connected by the splitter for comparing the number of the data packets of all the directions, thus improving the ECC fault positioning efficiency.

The invention provides a method and device for detecting a forwarding table and a detection device. A network detection device generates a detection message comprising a label stack, TTL, a source IP address and a destination IP address according to network topology information, wherein the label stack comprises N link labels, the value of the TTL is N+1, and the N is hop count from the network detection device to a to-be-detected network node; and the network detection device sends the detection message according to the link labels at the stack top of the label stack and receives a notification message sent by a next hop, namely a feedback node, of the to-be-detected network node; and the network detection device determines whether the forwarding table of the to-be-detected network node is accurate or not according to the IP address and the network topology information of the feedback node in the notification message. A fault is positioned rapidly.

The invention provides a fault detection method and device and relates to the communication technology field. The method is applied to first network equipment. The method comprises the following stepsof receiving a first BFD message sent by second network equipment, and determining the receiving time interval of the first BFD message and the second BFD message according to the receiving time of asecond BFD message and the receiving time of the first BFD message which are received last time; if the receiving time interval is greater than a preset time interval threshold, deleting a first message header packaged by the second network equipment in the first BFD message; determining whether the destination Internet protocol IP address of the first BFD message is the same with a local IP address; and if the destination IP address is the same with the local IP address, outputting state monitoring information, wherein the state monitoring information includes the current message header of the first BFD message, and the current message header is the message header without the first message header. Fault positioning efficiency can be increased.

The invention discloses a power transmission line double-end fault positioning method and system based on golden section search. The method comprises the steps of collecting the positive sequence voltage and positive sequence current at a double-end bus of a line at a fault moment when a short-circuit fault happens to a power transmission line, and listing a voltage calculation equation along theline by combining with a line impedance admittance parameter; selecting two test points on the line with the short circuit fault according to the golden section proportion; and respectively comparingthe double-end reckoning voltages of the two test points according to the voltage calculation equation along the line so as to judge a fault interval. The method is based on the voltage distribution characteristics along the line of the lumped parameter model, and the fault point is the minimum value point of the positive sequence voltage distribution curve, so that the search algorithm can be used for infinite approximation until the positioning precision requirement is met. The calculation pressure can be reduced, and meanwhile, the iteration speed is higher. The fault positioning calculation efficiency and reliability are effectively improved.

The invention discloses an inter-turn short circuit fault locating system and method. The system comprises a pulse generating unit, a data acquisition unit, a protection unit, a fault judgment and positioning unit, a data storage unit, and a display unit. The output end of the pulse generating unit is connected with both ends of a rotor coil; the input end of the data acquisition unit is connectedwith both ends of the rotor coil through the protection unit; the output end of the data acquisition unit is connected with the input end of the fault judgment and positioning unit, and the data storage unit and the display unit are connected with the fault judgment and positioning unit. The invention has the advantages of simple structure, reliability, small size and light weight, and protects the data acquisition unit through the protection unit, so as to prevent damage to the system caused by overvoltage or overcurrent; fault judgment and fault location of the tested coil are realized by similarity calculation; the coil fault location efficiency is improved and the diagnosis result is more reliable.

The invention discloses an intelligent operation and maintenance management method and system of data center alarm. The method comprises the following steps: acquiring alarm information; performing compression, correlation filtering processing on the alarm information to generate predicted alarm data; performing scheduling management on intelligent operation and maintenance manpower of a data center according to the predicted alarm data, and obtaining an alarm processing result; generating a report via the alarm information, the predicted alarm data and the alarm processing result; and performing real-time alarm display on the alarm information, the predicted alarm data and the alarm processing result. The system comprises five parts: an alarm information collection module, an alarm management module, a scheduling management module, a report output module and a real-time alarm display module. By adoption of the intelligent operation and maintenance management method and system disclosed by the invention, the operation state, the performance and the alarm condition of the intelligent operation and maintenance management system of data center alarm can be reflected on a unified interface, thereby presenting various data that need to be understood by workers of different roles, which is conducive to quickly finding the fault basis, and accordingly, the fault positioning efficiency is high.

The embodiment of the invention provides a fault location processing method and a device. The method comprises the following steps of: collecting service data information of each service subsystem according to a pre-configured service tag, wherein the service data information comprises service indicators and operation data information of network element nodes at various levels included in the service subsystem; According to the service index, if it is judged that the service subsystem is abnormal, the target faulty network element node is determined according to the operation data informationof the network element nodes at various levels. The apparatus is used to perform the method described above. The method and the device provided by the invention improve the fault location efficiency.