167results about How to "Realize fault location" patented technology

The invention discloses a power distribution network broken line fault location method. According to a structure of a power distribution network and a power supply mode, a local power distribution network line section is divided into a plurality of kinds of typical sections, and characteristics of voltage and load flow of each of endpoints of the typical sections in different broken line faults are proposed. During application, the characteristics of each local line section of the power distribution network are matched with the typical sections, types of the typical sections which the each local line section belongs to are determined, the measured characteristics of the voltage and the load flow of each of the endpoints in the each local line section are matched with the characteristics of the voltage and the load flow of each of the endpoints of the typical sections in the different broken line faults to judge whether the line section has the broken line fault and to judge types of the broken line faults, and the typical sections correspond to the line section. According to the power distribution network broken line fault location method, a modeling rule is used for customizing the method, and the comprehensiveness and the reliability for problem processing are achieved; the customization of the rule is flexible and prone to adapt to a plurality of operating modes of the power distribution network; the location is accurate, and the fault location of sections can be achieved; and human line patrolling is avoided, and the power distribution network broken line fault location method is an ideal method.

The invention discloses a DC injection type route selection positioning system and a method thereof, which makes use of neutral-point voltage to ground to provide power supply for the generation of DC signal and inject DC to a fault system, and realizes faulty route selection and position by the detection of circulation of the DC signals. The structure of the invention comprises a grounding transformer, a DC generator, a control device and a fault indicator FD, wherein, the grounding transformer is connected with a system bus and injects the DC to the fault system by the primary coil of the grounding transformer; the DC generator is arranged between the primary-side neutral-point N of the grounding transformer and the ground; the control device is connected with the secondary side of bus-bar potential transformer to monitor whether a power distribution system has single-phase earth fault, control the switching of the DC, measure the injected DC at the same time and adjust the injected DC according to the measured injected DC; the fault indicator FD is positioned at the outlet of each feeder, and the fault indicator FD is also arranged at the feeder at intervals to detect the injected DC and select faulty line and locate the fault.

This invention discloses a tracking method for base stations including: receiving an activated tracking message including ID of the tracked target and content needing track and tracking the target to get corresponding track content. This invention also discloses a base station, in which, related data can be got at the station to realize track to information of the base station and get complete track information and realize fault location and performance test.

The invention relates to a method for positioning a short-circuit fault of a distribution network based on distributed intelligent multi-calibration. The method comprises the following steps of: arranging a plurality of intelligent agents in the distribution network and establishing a modeled multilevel multi-verification short-circuit fault positioning rule for different operating modes of the distribution network; in the operation process of the distribution network, monitoring operation information of a local current distribution network in real time through each distributed intelligent agent; once the current is out of limit, sending a current out-of-limit signal to the directly-adjacent intelligent agent and a superior intelligent agent and checking whether a short-circuit fault early-warning signal exists locally; if so, assuring that the short-circuit fault happens locally; otherwise, waiting for receiving the current out-of-limit signal sent by the directly-adjacent intelligent agent; and after delaying the signal for time t, according to the local current out-of-limit signal and the received current out-of-limit signal, carrying out rule matching and multi-condition calibration to determine a fault diagnosis result by utilizing a local short-circuit fault positioning rule library and combining a wiring type of the distribution network and the position of the intelligent agent.

The invention discloses a fault location method based on a travelling wave when the signal / noise ratio is at a lower level. Because of the strengthening of capacitance effects of a high-voltage powertransmission line, the travelling wave decays comparatively large when is transmitted along the line, in particular when high resistance fault or low voltage inception angle ground fault occurs, the initial energy of the travelling wave is very low, and the energy is comparatively low after line capacitance decaying, and is mainly overwhelmed by noise. Therefore, as far as the present used travelling wave method is concerned, if a sampled signal is not preprocessed, wavelets transformation is directly used for carrying out fault location, but correct result can't be obtained. In the fault location method, a moving average filter is firstly used to preprocess the sampled signal, and then Bspline wavelet transformation is used to realize fault location. Because the moving average filter can effectively restrain the noise without decaying an abrupt signal, based on this, fault location at a low signal / noise ratio can be realized by utilizing the Bspline wavelet transformation.

The invention relates to a broadband access network method for accessing integrated services. The invention includes the following steps: firstly, establishing at least one label switching path (LSP) in broadband access network based on multi-protocol label switching (MPLS); then, MPLS encapsulates the service to be transferred in the broadband access node equipment and transfer in the broadband access network through the LSP. As MPLS is a technology of providing a multi-level connection, the method, which takes MPLS as a private line means for broadband access network networking and traversing core network, can solve the problem faced by broadband access network as integrated services bearer network, thus realizing the bearing of integrated services like IP video, voice, data and private lines (including IP leased line and ATM private line of traditional asynchronous transmission mode, TDM private line and FR private line ).

The invention belongs to the technical field of electric-power equipment detection, and in particular, relates to a detection device of dissolved gases in transformer oil based on infrared spectrum absorption. The device includes a light source system unit, a sensing arrangement unit and a detection acquisition and analysis unit; the light source system unit is composed of a high-power supercontinuum broadband light source, a light source controller and a photoswitch and is used for realizing output multiplexing control of the light source; the sensing arrangement unit is formed by arranging one sensing path of fiber Bragg grating hydrogen sensor series-connection wavelength division multiplexing and the other one sensing path of hollow photonic crystal optical fiber internal spectrum absorption sensing in a cavity body of an oil-immersed power transformer; the detection acquisition and analysis unit is composed of a wavelength demodulation device, a light intensity detector and a data acquisition and analysis device, the wavelength offset and the spectral absorption intensity of fiber Bragg grating hydrogen sensors are detected, and the data acquisition and analysis device records data and types and contents of corresponding fault gases are obtained by calculation; and on the basis, insulation conditions of the transformer oil are evaluated, positioned, analyzed and forecasted.

The invention discloses a distributed traveling wave range finding method comprising the following steps: collecting traveling wave voltage and current data of multi-measuring point according to preset distances; timing and correcting the acquisition time; determining the initial traveling wave speed according to traveling wave time and measuring point distance measured on measuring points of two ends of the fault; determining the fault position according to the initial traveling wave speed, the distance of two adjacent measuring points, the fault propagation time to the measuring point, and two end range finding. The method distributes measuring points along power transmission line poles according to certain distances, and can dynamically measure the traveling wave speed approaching to the real value, thus solving the existing power transmission traveling wave monitoring problems, and ensuring the range finding precision under various complex conditions like high resistance grounding.

The invention discloses an anti-colony-algorithm-based distribution network fault positioning method. The method comprises: an anti colony algorithm evaluation function is constructed; and fault positioning is carried out by using an anti colony algorithm. When the anti colony algorithm is used for carrying out fault positioning, the evaluation function serves as a basis of an evaluation solution performance; and the good performance expresses the selected path is short. When equipment with the fault in the distribution network is diagnosed, a hypothesis is found and all uploaded RTU or FTU information can be explained well; and thus deviation of the corresponding FTU or RTU information and actual uploaded information is minimized by finding the hypothesis, thereby realizing fault positioning of the distribution network.

The invention relates to a single-phase earth fault line selection method of a 10kV power distribution network earthing system. When the ratio between the inductance impedance value of an arc suppression coil and the impedance value of a harmonic elimination resistor is within some ratio range, and a single-phase earth fault occurs in the 10kV power distribution network earthing system, the difference between the zero-sequence voltage and the zero-sequence current of a fault outgoing line will be smaller than a preset value, and a protection device outputs a fault indication signal and an outgoing line switch actuating signal when the conditions are satisfied. The single-phase earth fault line selection method of the 10kV power distribution network earthing system has the advantages that parameter characteristic values on an arc suppression coil loop of the10kV power distribution network earthing system are adopted to be combined with the zero-sequence voltage and the zero-sequence current of the 10kV power distribution network earthing system, the changes of a phase angle cannot be easily influenced by factors such as operation conditions of the10kV power distribution network earthing system, criterion output is stable, and accuracy of judgment is high. The single-phase earth fault line selection method of the 10kV power distribution network earthing system can rapidly achieve fault location, can greatly improve the degree of automation of a power distribution network, can greatly reduce the time of a blackout of a user, reduces loss caused by the blackout, overcomes the defects existing in a small-current earthing operation mode, and has good social benefit and economic benefit.

The invention discloses a video quality monitoring method, a video quality monitoring device and a CDN system. The video quality monitoring method comprises the steps of: carrying out video stream sampling at interface monitoring points arranged at video input and output interfaces of CDN nodes at different levels; analyzing inlet video streams and outlet video streams sampled from the interface monitoring points and acquiring KPI parameters; and judging whether the playing of the video streams is abnormal according to the KPI parameters, and positioning a fault point. The video quality monitoring method, the video quality monitoring device and the CDN system can conduct whole-course tracking and monitoring of video streams during CDN video quality monitoring, are used for carrying out double monitoring on upper and lower level interfaces of the CDN nodes and associating the corresponding video streams, achieves linkage analysis of inlet video stream KPI and outlet video stream KPI through the KPI monitoring on the inlet video streams and outlet video streams, reflect video quality overall KPI parameters of the upper and lower level nodes objectively, can position the fault point causing the KPI abnormity, and achieve video quality monitoring and fault positioning.

The invention relates to a fault recording device based on a voltage traveling wave principle and a range finding method. The fault recording device based on a voltage traveling wave principle comprises a recording criterion unit, a traveling wave unit, a time synchronization unit, and a management unit which are all installed in a wave recorder simulating cabinet. The management unit is connected with the traveling wave unit and the recording criterion unit. The recording criterion unit determines recording activation and computes various characteristic parameters. The traveling wave unit determines the coming time of the head of a traveling wave in combination with software and hardware. The time synchronization unit is connected with a required time module and provides reliable and accurate system time for the device. The management unit performs communication management, recording management, comprehensive criterion management, and system task management. A bus voltage travelling wave is integrated into the fault recording device so as to increase power transmission line fault point positioning accuracy in the fault recording device and greatly shorten fault line inspection and fault repair time.

The invention discloses a direct current power distribution network line single-pole ground fault locating method. The method comprises the steps that 1, a fault current differential initial value expression is obtained according to a transient characteristic equation of a fault current; 2, a fault current differential initial value is replaced through an interpolation algorithm; 3, a fault location value expression containing the fault current differential initial value is obtained; 4, the fault location value expression is combined with a loop current equation, and a fault-based location equation is obtained; 5, voltage and current value information before and after a single-pole ground fault happens is obtained, the fault current differential initial value obtained in the step 2 and the fault location equation obtained in the step 4 are combined, and a fault location value is obtained. According to the direct current power distribution network line single-pole ground fault locating method, calculation is easy, the application range is wide, the method is free of influence of factors such as transition resistance, the calculation result can be used for offline maintenance, automatic operation can be achieved, high resistance to transition resistance is achieved, and when the transition resistance is increased, the high location precision is still achieved.

The invention relates to a protection method, a system and a protection control device for a multi-section cascaded transmission network. The method comprises the following steps: detecting the signals of the working path and the protected path in each section; when detecting that the working path and the protected path of the first-level section loss the signals at the same time or successively within a first preset time period, maintaining the states of the working path and the protected path of the first-level section before the business-side fault is cleared; when detecting that the working path and the protected path of each section posterior to the first-level section loss the signals at the same time or successively within a second preset time period, maintaining the states of the working path and the protected path of the section within a preset switch lag time period. The protection method, system and device solve the problem that the failure of a certain upstream section in the prior network results in the random, out-of-order and frequently-switched misoperation of several downstream sections, ensure stable business on the original path when the downstream sections are normal, avoid the incorrect switching and the incorrect alarm report, facilitate the network operation maintenance, and achieve the effect of rapid fault location.

The invention discloses a fault positioning method used for a power distribution network and comprising multiple T-connection inversion distributive power sources. The method includes steps of electrifying a relay protection device; initiating circuit parameters; acquiring power of the distributive power sources; acquiring voltage phasor and current phasor on two sides of a feed line; calculating output current of the distributive power sources; calculating the magnitudes of comparison voltage on two sides of the feed line; if the comparison voltage is greater than a setting value, determining faults within a feed line zone and starting a fault positioning algorithm; if the faults occur in a specific section, calculating a measurement distance percentage, and determining the faults within the section if the measurement distance percentage is smaller than 100%. By adopting the method, problems in relay protection and fault positioning when the multiple distributive power sources are in T-connection with the circuit can be solved effectively. Besides, the method is insusceptible to influence by connection number and connection position of the distributive power sources, fault types and transition resistors, and is high in adaptability and engineering practicality.

The invention provides a power distribution network protection method based on fault feature matching. The method comprises following steps: step one, when a power distribution network is at fault, obtaining the current fault characteristic values of all positions of the power distribution network in real time; step two, matching the current fault characteristic values of all positions of the power distribution network with reference fault characteristic values, which are corresponding to each fault type pre-stored in fault type database, to obtain the fault type corresponding to the current fault; step three, according to the fault type, inquiring a protection strategy corresponding to the fault type in protection strategy database; and step four, according to the inquired protection strategy, forming protection motions, and executing the protection motions to protect the failed power distribution network. The invention also provides a corresponding system. The method and system can quickly position the faults and the maintenance efficiency is improved.

The invention provides a circuit breaker-based automatic fault processing method of a local reclosing feeder. The circuit breaker-based automatic fault processing method comprises the steps of 1) configuring delay rapid-breaking protection and primary reclosing function in a circuit breaker at an outlet of a substation, and arranging circuit breakers at segmented switches and branch switches alonga line; 2) setting delay closing time T1 and closing determination time T2 of the segmented switches and the branch switches; 3) performing fault tripping; 4) performing fault isolation, and recovering power supply to an upstream load; and 5) recovering power supply to a fault downstream load, in which a contact switch is closed by a remote or manual operation mode so as to recover power supply to the upstream load. By the circuit breaker-based automatic fault processing method, the problem of reclosing for two times is needed to be configured for automation of a traditional voltage-time typeand voltage-current type reclosing feeder is solved, the influence of reclosing for many times on the load during the automatic fault processing process of the reclosing feeder is prevented, and thepower supply reliability and the high-quality service level of a power distribution line are greatly improved.

The invention discloses an auxiliary method for fault location and power supply recovery based on a GIS platform. The method comprises: distinguishing regional measurement and control properties; selecting a suitable fault location method and carrying out fault location (a rough set method, a Bayes formula method, and a power distribution network fault location method based on a GIS hierarchical power supply tree method); using an FTU device or a computing device to avoid human or power distribution network information interference, and to carry out accurate fault location; using a heuristic search algorithm to carry out analysis of different power supply recovery situations such as self-feeder recovery, whole area recovery of support feeders, partial area recovery of support feeders, load shifting, load shedding, and the like of the power distribution network, and enabling selection of a power supply recovery scheme set after a power distribution network fault; and evaluating and analyzing the selected scheme set by using a fuzzy evaluation method, to select an optimal power supply scheme. According to the method, multi-class multi-source information is comprehensively obtained; a scientific and systematic comprehensive analysis method is established to locate a faulty point; an optimal power supply recovery scheme is obtained, thereby making a conventional simple determination method obsolete.

The invention discloses a power distribution switch machinery characteristic on-line monitoring system and a monitoring method. The power distribution switch machinery characteristic on-line monitoring system comprises a power distribution switch, a power distribution terminal and main station waveform recording and analysis system which are successively connected. The power distribution switch has an operation mechanism and controls the on-and-off of the power distribution circuit through the operation mechanism and realizes the fault clearing, isolation and a node for load transferring; the power distribution terminal is matched with the power distribution switch for collecting voltage and the current waveform of the operation mechanism, performing statistic on the motion times of the switch, collecting the switch position signals, realizing the pre-processing and initial determination of the information, and uploading the data to the main station waveform recording and analysis system; and the main station waveform recording and analysis system receives the waveform transmitted by the power distribution terminal. The invention can retrieves the waveform of the operation mechanism of any power distribution switch and the machinery characteristic determination result on the power distribution terminal by the power distribution switch and realizes the fault alarm and fault positioning of the operation mechanism of the power distribution switch in order to provide the convenience to the maintenance staff to maintain.

The invention discloses a remote pump optic fiber amplifying module comprising a wavelength division multiplexer, at least a section of erbium-doped fiber and two circulators each having three ports. The port 1 of the first circulator is connected with the port 3 of the second circulator, wherein the port 3 of the first circulator is connected with one input end of the wavelength division multiplexer; the output input end of the wavelength division multiplexer is connected with the port 1 of the second circulator, thus optical signal is input from the port 2 of the first circulator and output from the port 2 of the second circulator. The erbium-doped fiber is serially connected between the input end of the wavelength division multiplexer and the first circulator, and / or between the output end of the wavelength division multiplexer and the second circulator; while the other input end of the wavelength division multiplexer is connected with the output end of the remote pump. The invention can provides passage for reversal feedback optical signal, ensure the optical signal of OTDR to be transparently transmitted through the remote pump optic fiber amplifying module, accordingly, the function of the remote pump optic fiber amplifying module can be expanded.

The invention provides an onboard fault locating system for an ICNI device and aims at providing a fault locating system accurate in localization, stable and reliable, and operable via a graphical interface. A technical scheme of the invention is that a data acquisition analysis subsystem acquires the operating state parameters of circuit modules in each LRU or LRM of the ICNI device, filters and analyzes data of a selected sensor function, and circularly updates data content to a human-machine graphical interface; a resource scheduling parameter configuration subsystem simulates an avionic system in order to send control and parameter configuration commands to the ICNI device, and may flexibly select a universal module and a hardware channel used by an internal functional threading of the ICNI device according to a locating requirement; a simulated failure injection subsystem constructs interface control data of a fault according to a requirement, injects the fault into any internal module or channel of the ICNI device, issues the fault to the ICNI device, queries the modified fault content of the ICNI device, triggers an ICNI reconstruction mechanism, and locates and checks sensor function and module faults.

The invention discloses an online single-shot thrust fault diagnosis method for a carrier rocket. The method comprises the following steps: S100, establishing a carrier rocket state equation based onthe attitude kinematics and kinetic equation of the carrier rocket, widening the band identification quantity into the state quantity, and establishing a corresponding number of system state equationsand measurement equations for fault diagnosis of the single-shot thrust of the carrier rocket according to the actual number of the single-shot thrust of the carrier rocket; S200, in the real-time flight process of the carrier rocket / missile, estimating the single-shot thrust of the carrier rocket by using unscented Kalman filtering, and obtaining an estimation error and a covariance matrix; andS300, performing probability matching calculation by using the error and the covariance matrix to realize thrust fault positioning and obtain the output thrust of a faulted engine. The method has theadvantages of being simple in structure, simple in design process, high in convergence speed and high in identification precision, and therefore the method has wide application prospects in carrier rocket single-shot thrust fault diagnosis.

The invention discloses an intelligent station terminal with an edge computing capability and a fault judgment method. The intelligent station terminal is composed of a central processing unit, a power supply and management module, a communication module, a line loss module, an acquisition control module, an operation control module and a man-machine interaction module. The central processing unit, the power supply and management module, the communication module, the line loss module and the acquisition control module all adopt a plug-and-play mode, so that the expansion is convenient. The device is installed at a power distribution terminal at a power distribution network switching station, a power distribution room, a ring main unit, a box-type substation or the like, and has the functions of multi-line acquisition, control, fault detection and the like. By performing a partitioning technology on the CPU, operational capability of the station terminal is improved, and the station terminal has the capability of edge computing. The device is connected with a main station and adjacent terminal equipment through a communication medium. Fault positioning, fault isolation and non-faultarea power restoration are rapidly realized by utilizing a transverse and longitudinal multidirectional communication mode and transverse communication data of adjacent terminals, and a three-remotefunction is realized by matching with a longitudinal communication mode of the main station.

The invention discloses a distribution network traveling wave fault positioning method based on multi-terminal data. A terminal node of a used measurement terminal is located at a tail end position of each branch of the distribution network. The method comprises steps: the fault initial wave front time of each terminal node is calculated; according to the fault initial wave front time of each terminal node and the length of a branch circuit, the fault initial wave front time of each virtual node corresponding to each terminal node on a trunk circuit is calculated; according to the wavelet transform modulus value of each terminal node, the fault initial wave front time of each virtual node and the circuit length data, a reference node on the trunk circuit is determined; according to the fault initial wave front time of adjacent two virtual nodes of the reference node and the circuit length data, whether a fault point is in the trunk circuit or the branch circuit is judged; and the position of the fault point is calculated. According to the method of the invention, fault in the trunk circuit and the branch circuit can be accurately positioned, and the system has high reliability.

The invention discloses an Internet business packet capturing and fault positioning method based on a non-root android terminal. A virtual communication channel is established on an android terminal; communication data packets with identification ID are captured on the virtual communication channel; the communication data packets with the identification ID are written into a data format file; the data format file is analyzed; and the content of the data format file is analyzed, and a communication abnormity is positioned. Through application of the method, when the abnormity that APP service cannot surf the Internet or surfs the Internet slowly occurs in the android terminal, the communication fault can be rapidly positioned.

The invention provides an underground cable fault detection robot, which includes a robot body and a driving device for driving the robot body to walk, and also includes a cloud platform, a lifting mechanism, a CCD camera and an LED lighting lamp; the lifting mechanism is placed on the robot body, and the lifting mechanism drives the cloud The platform is lifted; the platform is connected with the CCD camera, and the platform is used to control the swing of the CCD camera; the LED lighting is located near the CCD camera; the present invention can replace manual cable detection in a narrow and dark underground; the height sensor, angle sensor and control The module can provide protection for the shooting angle; the built-in image processing module of the present invention can process the pictures by itself to find out the fault occurrence point, and can feed back the fault occurrence point to the main server of the power grid through the wireless module; the present invention also provides specific image processing Method steps, the method steps are well applied to the underground dark environment characteristics, and realize fault location in a large range, and have high accuracy and high efficiency.

The invention belongs to the field of a broadcast television network, in particular to a topology discovery method, device and system of broadcast television network equipment. The topology discovery method comprises the following steps of: sending an authentication package through broadcast by the first level equipment; receiving the authentication package sent by (N-1)th level equipment connected with the Nth level equipment by Nth level equipment, and judging whether the (N+1)th level equipment connected with the Nth level equipment is provided below the Nth level equipment, wherein N is more than or equal to 2; if so, sending a confirmation package to the (N-1)th level equipment by the Nth level equipment and sending the authentication package which is added with own information through the broadcast; otherwise, adding own relative information into the authentication package by the Nth level equipment, changing the information type of the authentication package into a feedback package, and sending the feedback package to the primary equipment directly; and analyzing by the first level equipment according to the received feedback package and generating a topological relation list of all the equipment. By adopting the invention, the network equipment topology relation list is accurately and timely generated, so that a plurality of different types of the equipment can be combined well; and the uniform management and control is realized.

The invention discloses a method and a device for monitoring a failure of a data link layer, and network equipment. According to the embodiment of the invention, a monitoring result is obtained by monitoring the legality and operation process of service operation in the data link layer, and is compared with a preset operation rule to obtain failure information, namely the failure of the data link layer is positioned by monitoring the legality and operation process of the service operation in the data link layer, so that failure positioning efficiency and accuracy can be improved to solve the problem of low processing efficiency of the failure of the data link layer in the prior art.

The invention provides a network fault positioning method, a server, an acquisition probe and a storage medium. The method comprises the following steps: sending an acquisition request to a target acquisition probe such that the target acquisition probe sends acquisition requests to a user edge device and an operator edge device respectively according to the acquisition requests such that the user edge device returns client network data at the current moment to the target acquisition probe according to the data acquisition request, and the operator edge device returns operator network data atthe current moment to the target acquisition probe according to the data acquisition request; wherein the target acquisition probe is deployed in a client network; receiving the client network data and the operator network data sent by the target acquisition probe; and performing network fault positioning according to the client network data and the operator network data. The scheme can realize network fault positioning.