183results about How to "Fast fault location" patented technology

A monitoring system for detecting earth faults in an electrical power supply grid providing a power signal includes a plurality of monitoring devices, each of the monitoring devices including a detector for detecting the level of harmonics in the power signal, wherein the level of harmonics is detected in a specific frequency range. Each of the monitoring devices further includes a memory for storing a harmonics reference value, a processor for comparing the detected level of harmonics with the reference level, and a communication device for transmitting an alarm if the detected level of harmonics is above the reference level for a specific period of time. Each of the detectors includes an optical sensor for detecting the harmonics by use of the Faraday effect.

A monitoring system for detecting earth faults in an electrical power supply grid providing a power signal includes a plurality of monitoring devices, each of the monitoring devices including a detector for detecting the level of harmonics in the power signal, wherein the level of harmonics is detected in a specific frequency range. Each of the monitoring devices further includes a memory for storing a harmonics reference value, a processor for comparing the detected level of harmonics with the reference level, and a communication device for transmitting an alarm if the detected level of harmonics is above the reference level for a specific period of time. Each of the detectors includes an optical sensor for detecting the harmonics by use of the Faraday effect.

The invention discloses an on-line diagnosing method for faults of a metering production facility. The method comprises the following steps that firstly, centralized monitoring data are collected; secondly, a diagnosing expert base (training sample) is established; thirdly, a fault prediction model based on an artificial neural network is established; fourthly, on-line diagnosis is carried out on the faults of the metering production facility. All of hardware production units of the metering production facility are provided with alarming equipment, however, when the faults actually occur, production is usually already influenced, and the alarming equipment does not send alarms aiming at production anomalies and some equipment faults. An on-line diagnosing system for the metering production facility constantly analyzes 'four-line-one-storeroom' system running data, a current system running state is judged, the faults are predicted, when the production anomalies or the equipment faults are predicted, staff can solve the problems in time, threats which might influence the production are eliminated, and the reliability of the metering production facility is greatly improved.

The invention relates to an intelligent socket for the Internet of Things. The intelligent socket comprises a socket body which is provided with an MCU, a power supply module, a measuring unit, a storage unit and an electric appliance automatic identification unit. The power supply module, the measuring unit, the storage unit and the electric appliance automatic identification unit are respectively connected with the MCU which is in communication connection with a far-end control center. Power consumption information of an electric appliance can be fed back to a far-end management center in real time. The management center provides power-using details and a power-using detailed list for a user. The intelligent socket has a self-identification function, an ad-hoc networking function and a self-routing function, when the user practically uses the socket, the user does not need to change existing living habits on appearance and operation, the user can learn of real-time and history power-using situations, the power-using detailed list, power quality, electric appliance types, operation working conditions and other data at any time, and meanwhile when a power supply is in fault, in overload, in overvoltage and in overcurrent, power can be cut off timely, electric appliances are protected, fire hazards are avoided, and fault location is quick.

The invention discloses a fault-tolerance correction method for a matrix algorithm fault location result of a power distribution network. An evaluation function is utilized to evaluate fault section location results and the splitting-combinations of the location results of the matrix algorithm, a splitting-combination which enables the evaluation function to have the minimum value is selected from the fault section location results and the splitting-combinations of the location results, the splitting-combination is the actual fault section of the power distribution network, and the fault-tolerance location of the fault section of the power distribution network is realized. According to the fault-tolerance correction method, the fault section location results of the matrix algorithm are sufficiently utilized, the evaluation on the fault section location results and the splitting-combinations of the fault section location results, carried out by the evaluation function, is also taken into consideration, no complicated iteration operation is needed, the location speed is high, the accuracy is high, the problems that the fault tolerance of the matrix algorithm of the power distribution network fault location method is poor, the fault location speed of an artificial intelligent algorithm is low, and the location results easily trap into local optima are well solved, and the fault-tolerance correction method is simple and practical and has the prospect of online application.

The present invention relates to a method for locating single-phase ground fault of a low current grounding system power distribution network, including determining a total length L[total] and a total impedance Z[total] between two lines of M and N, and injecting signals when occurring a fault, when a P point between the M and N positions occurring a single-phase ground fault, systems of the two positions inject signals at the M and N position, and measures the amplitude of a return current signal as well as a phase difference between the return current signal and the injection voltage signal, after a line selection device has selected the fault phase; calculating a loop total impedance Z[M] grounded through the P point from the M and N ends, the modulo of the Z[N], and a phase angle Phi[M] of the Z[M] and the Z[N], according to |Z| = |U| / |I|, the measured injection voltage, the amplitude of the return current signal and the phase difference, a distance from the fault point P to the M position is further calculated through the following formula. By the method of the invention, it is easy to detect when the signal amplitude is strong, the attrition in the power distribution network is low, the algorithm is high, and the accuracy is high.

The invention discloses an interactive electronic technical manual browsing system, which is characterized by being a three-layer running mode based on network connection, that is a data layer (1), anintermediate layer (2) and an express layer (3), wherein the data layer (1) is a Common Source Data Base(CSDB); the intermediate layer (2) comprises a data ADO.NET data access model (4) and a Web server ASP.NET (5); the data access model (4) extracts and saves data from the data layer (1); the Web server ASP.NET (5) processes, maintains and guarantees service logic and service rule which are related with technical data; the express layer (3) is a client browser; the system can directly use the technical data of XML format; information elements can be used by a plurality of systems, such as anIETM, CBT(based on the training of a computer), a WBT(based on the training of network) and the like, for many times and are easy to update; and the interactive electronic technical manual browsing system can realize convenient and quick information search of a plurality of channels, can be integrated with an expert system and the CBT to enhance fault positioning, realizes real-time training, andhas simple and convenient operation and friendly interface.

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 method for processing boundary information deficiency of a centralization protector of a digitalized converting station, which comprises the following steps that: the centralization protector collects current and voltage values of the whole converting station and the states of circuit breakers, and acquires voltage and current sampling value information of the whole converting station in real time; when faults happen, if the current sampling value information of one line is deficient, a current sampling value of the information deficient line is synthesized on the premise that a bus is supposed to have no faults, and then a bus voltage and a line current sampling value are used, wherein the information deficient line adopts a resultant current, and the faults are removed through conventional line protection; and if the faults are detected on a first section of the conventional protection of the information deficient line, the circuit breaker of the line is tripped off without delay, and then the conventional bus differential protection is used for detecting whether the bus has the faults or not so as to determine whether to trip off all the circuit breakers connected with the bus. The method can quickly position the faults and remove the faults of boundary regions, greatly simplifies the cooperating setting of protection, and improves the reliability of the protection.

The invention relates to a transformer station equipment cloud maintenance system and a monitoring system. The cloud maintenance system comprises a transformer station monitoring subsystem and a remote maintenance subsystem, wherein the transformer station monitoring subsystem comprises a monitoring layer and an evaluation layer, the monitoring layer is used for monitoring the relevant state information of transformer station equipment and outputting the state information to a server of the evaluation layer to acquire health status data of the transformer station equipment, and the remote maintenance subsystem comprises a cloud maintenance work station in remote communication connection with the evaluation server through the network and is used for receiving the health status data of the transformer station equipment sent by the evaluation server. The system is stored with all the operation state information of the whole far-end transmission transformer station, the health status data of the transformer station equipment is acquired through far-end transmission, the data is not scattered data, data bulk is relatively small, so loss of the data does not easily occur, and the cloud maintenance work station further does not misjudge the operation state of the transformer station.

The invention relates to a fault locating method and system of an active power distribution network. The method comprises the following steps that 1 fault current constant values of feeder terminals are set to be higher than the largest load current; 2 when the active power distribution network has faults, fault detection is started for the feeder terminal through which a fault current passes, and a short-circuit current measurement value is submitted to a power distribution network system master station; 3 the power distribution network system master station resets a fault current constant value according to the short-circuit current, passing through an outlet breaker, submitted by a circuit outlet switch feeder terminal and then judges whether the fault current passes through a switch of one certain circuit, and the fault section is recognized by adopting a common fault locating method. The system comprises the power distribution network master station, the feeder terminals and a communication system, and the power distribution network master station is connected with all the feeder terminals through the communication system to achieve information exchange. The method and system can locate the faults easily and rapidly, easy to achieve and good in use effect.

The present invention provides an on-chip debug and diagnostic method, a device and a chip. The method comprises the steps of monitoring the interrupt trigger information; generating a stop clock signal, a freeze signal and an interrupt trigger flag based on the interrupt trigger information; according to the stop clock signal, closing a functional clock; according to the freeze signal, freezing the state of a non-debug module port; upon monitoring the interrupt trigger flag, recording the state of an internal trigger and the internal state of a memory; after the recording is completed, recovering the function of the clock. Based on the on-chip debug and diagnostic method, the device and the chip, the functional clock can be automatically closed when the chip goes wrong, and the operation of a processor is paused. Meanwhile, the debug and diagnostic function is triggered automatically, so that the internal state of the chip can be quickly and accurately acquired. The debugging capability of the chip is effectively improved. therefore, the fault diagnosis is more rapid and the fault location is more accurate.

The invention discloses a method for testing a radio-frequency hardware module. The method comprises dividing each test task of the radio-frequency hardware module into a plurality of test subtasks in the test process. During the test task, the test subtasks are executed in order, if the current test subtask is executed successfully, the next test subtask is executed; when the test subtask is overtime or abnormal, the test task is terminated immediately, and a current test task mark, a current test subtask mark and the corresponding fault information are output at the same time. The test method for the radio-frequency hardware module, provided in the invention, divides each test task into a plurality of the test subtasks, which has the advantages that a user can efficiently control the test and obtain important test information during the test process; and that the method realizes the rapid fault location and facilitates the maintenance and transplantation of programs.

The invention provides a distribution network fault location method based on an improved quantum cuckoo algorithm. Distribution network fault location is modeled into high-dimensional combination optimization; a distribution network fault location section is expressed by using a quantum double-chain code; with an improved Levy flight algorithm, updating of a value of each dimension of a quantum cuckoo algorithm is optimized; and the quantum double-chain code is processed by variation by combining a differential evolution algorithm, so that an optimal solution to the distribution network fault location combination and an optimal solution is calculated. According to the invention, an optimized objective function of the distribution network fault location model is established; optimization calculation of the objective function is performed based on the improved quantum cuckoo algorithm; a fault section is identified; and verification is performed by using a distribution network example. Moreover, fault point location under the condition of multi-point simultaneous fault occurrence can be processed.

The invention discloses a method for determining the state of testing hardware by using statistical test data in the process of testing a wafer of an integrated circuit. The test data generated in the process of testing the wafer reflects the physical parameter of each chip, the function of an internal module, a manufacturing process of each chip, and the state of the testing hardware in the testing process. By a site yield statistical method for a multi-site parallel test, whether the state of the testing hardware in the testing process is defective or not is checked. By the method, the yield of each site is obtained through the statistical induction of massive test data, and specific bin value distribution is obtained, so that the failure cause of the testing hardware can be quickly found, solution measures are taken, and test quality is ensured.

The invention discloses a quick protection method applicable to an intelligent distribution network. The method is that a current break variable starting element is utilized to start protection; adjacent protection devices exchange information; the protection is started from the downstream of a distribution circuit in which fault current is detected, and a circuit breaker at each protecting part is sequentially tripped off until reaching the upstream of the circuit, so that whether the fault current occurs in can be determined through adjacent protection devices before tripping off the circuit breaker to achieve fault positioning and fault isolation; meanwhile, an interconnection switch of each circuit is utilized to quickly recover from fault. With the adoption of the method, the quick fault positioning, fault isolation and recovery from fault of the distribution circuit can be achieved; the fault time is reduced; the power restoration of a non-fault power-off area is sped up; therefore, the power supply reliability is improved; the conflict between a distributed power supply and quick protection of the distribution network can be solved; in addition, the advantage of the network structure with high power supply capacity of the intelligent distribution network can be brought into full play, and the intelligent distribution network can be adapted well.

The invention belongs to the technical field of monitoring management systems, and particularly relates to a one-stop network monitoring management system based on a Zabbix open source platform. The system comprises a database area, an acquisition area and a WEB area. The MySQL1 in the database area is used as a master library, and the MySQL2 in the database area is used as a slave library. The one-stop monitoring management platform is realized based on a deep network management function of a mainstream open source platform Zabbix, adopts distributed deployment, and supports a two-stage agenttransverse expansion architecture. Through monitoring a network, a host, middleware, a database, a storage device, virtualization management and the like, the comprehensive overall monitoring of thesystem is realized. Through flexible alarm setting, accurate alarm detection, diversified alarm pushing and alarm experience accumulation, the operation and maintenance personnel can effectively obtain fault information in time. The rapid fault positioning and fault analysis functions are provided. The unified centralized monitoring is realized. The production system environment is comprehensivelymonitored. The first-time intelligent early warning, first-time fault discovery and first-time notification release are realized.

The invention discloses a rapid self-healing distributed intelligent feed line automatic system which is characterized in that the system is composed of a main station, a transformer substation, a local area network, a GPS and multiple intelligent power distribution terminals. The intelligent power distribution terminals are connected with the main station through an optical fiber ethernet. The transformer substation is connected with the intelligent power distribution terminals through a circuit breaker. The intelligent power distribution terminals are connected with the intelligent power distribution terminals through a current mutual inductor and a voltage mutual inductor. The intelligent power distribution terminals have the effects of state monitoring, fault detection, fault location, fault diagnosis, information interaction and switch motion control. A new method of realizing feed line fault location through an improved differential current method is utilized so that high-accuracy and high-speed fault location of intelligent feed line automation can be realized. The method of realizing fault recovery through heuristic search is utilized so that rapid fault recovery of intelligent feed line automation can be realized, and feed line load balancing can also be realized.

The invention discloses a method for processing warning correlation information and a device thereof. When network element equipment generates a warning, the warning correlation of the warning is judged by the warning correlation rule of the network element equipment, the warning correlation information is generated according to the judgement result and the warning correlation information together with initial warning information of the warning as warning information are sent to a network management system by a network element management system. When the network management system receives the warning information, the network management system judges the warning correlation of the warning information. The invention overcomes the disadvantage of a passive warning correlation analyzing method and also solves the problem of the prior art that the judgement treatment of the warning correlation is only carried out at a network element side or a network side, so that the treatment result has certain limitation and one-sidedness.

The invention relates to an active power distribution network fault positioning method based on current polarity comparison. Each detection point of an active power distribution network feed line is provided with a switch and an FTU, the FTUs are in information interaction via communication network. The FTUs detect the fault current in real time, the current abrupt change time is taken as the fault starting point, the fault current signal of half cycle after the fault is recorded, the polarity is calculated according to the data of the half cycle, and the fault positioning is realized by comparing the polarity of the fault current of the adjacent detection points. In addition, when the fault positioning credibility is low and missed reporting occurs, the data detected at the downstream replaces the detection point data to realize the fault positioning, so that the method has a certain fault tolerance capability. The high-precision fault positioning of the active power distribution network including a distributed power supply can be realized, and the rapid fault positioning can be realized as well, so that the requirement of the active power distribution network can be met. The method further supports the power distribution network of the high-permeability distributed power supply, and facilitates the promotion of energy saving and emission reduction and smart grid construction.

The invention relates to a current fault component-based substation area backup protection method and system. The method comprises the following steps: 1) a substation area backup protection boundarycondition is determined; 2) differential areas with a boundary differential area and a component differential area covering different protection ranges are determined; and 3) substation area backup protection recognizes a fault position according to defined differential judgment of each differential area, and the original main protection action condition of the component, a power grid topology structure and a breaking state of a circuit breaker are integrated to realize high-performance backup protection for the substation. According to the current fault component-based substation area backupprotection method, various different types of fault in intra-station and inter-station lines can be quickly and reliably recognized, a tripping area can be expanded automatically when the circuit breaker fails to operate, the fault positioning time can be effectively shortened in the current fault component-based search scheme, and the safety of the power grid can be greatly ensured.

The invention discloses an economical operation control method for distribution transformers with a spare power automatic switching function. A distribution network system has three operation modes. When the distribution network system is in the control mode, power failure conditions of low-voltage sides of two transformers are detected first, and a relay is used for collecting on-off states of three phases of breakers on the low-voltage sides of the transformers; when any two phases are powered off or the three phases are all powered off, it is judged that the transformers are in a power failure state; then, switching is conducted according to different power failure conditions. In the switching process, firstly, a load is removed from the low voltage side of an original system; secondly, the high voltage on the other side is put into use, then the low voltage is put into use, and finally the high voltage on the fault side is removed. According to the economical operation control method, 10 KV-0.4 KV power distribution devices are combined to be an integral whole and controlled, so that the control difficulty is reduced; switching of the distribution transformers is automatically achieved according to built-in logical functions, so that no-load loss of the transformers is reduced, and economical operation is achieved. The reliability of no-voltage judgment is improved through multi-phase voltage detection, no-voltage faults can be detected more effectively, the quality of electric energy is improved, and the security of electric equipment is protected.

The invention discloses a fault positioning system and method for an overhead power distribution line. The fault positioning system comprises fault indication units, fault monitoring units and mobile intelligent fault positioning terminals, and is characterized in that the fault indication units are used for acquiring and monitoring load information and line fault information of the power distribution line and transmit the load information and the line fault information to the corresponding fault monitoring units through wireless local area communication networks; the fault monitoring units are used for receiving the load information and the line fault information which are transmitted by the power distribution fault indication units, and sends remote measurement packets and fault information short message packets to the corresponding mobile intelligent fault positioning terminals through a wireless wide area communication network; and the mobile intelligent fault positioning terminals are used for performing information interaction with the power distribution fault monitoring units, realize monitoring for the power distribution line, execute a fault positioning strategy so as to realize fault section positioning, carry out positioning according to topological graph and display fault information. The fault positioning system disclosed by the invention gives an alarm timely when a fault emerges and displays a fault positioning section, thereby reminding the maintenance personnel to process in time, being convenient for quick rush repair for faults, greatly improving the operation and maintenance efficiency, and having good application prospects.

The invention discloses a network analog simulation system for a large-scale integrated data network based on NS-3. The network analog simulation system is characterized by comprising three subsystems: a visualization system (1), an analog simulation system (2) and a network operation analysis system (3). A framework used by the network analog simulation system compensates and perfects the defect of an existing NS-3 function module; 22 function modules systematically built based on an NS-3 platform and a parallel module provide an omnibearing function support for the simulation of the integrated data network. According to the network analog simulation system, technologies of route analysis, flow analysis, data network element analysis and the like can be integrated based on overall operating status data of the integrated data network; through the realization of the framework, a simulation platform for rapid fault location and diagnosis and network performance analysis can be provided at high efficiency and high precision.

The invention belongs to the technical field of power system fault positioning and discloses a fault location method for two ends of a line irrelevant with transition resistance and load current. The fault location method comprises that a fault location device detects positive and negative sequence voltage and positive and negative sequence current of the two ends of the power transmission line, performs distributed current compensation to the positive and negative sequence voltage and the positive and negative sequence current of the two ends of the power transmission line and then utilizes the positive and negative sequence voltage and positive and compensated negative sequence current of the two ends of the power transmission line to directly calculate fault positions. The fault location method is applied to quick fault positioning of the two ends of the power transmission line, influence of distributed capacitance to the accuracy of positioning results is eliminated, the fault positions are not required to be calculated by means of a search algorithm, operation quantity is low, and the fault positioning speed is high. The fault location method utilizes double-end sequence components to achieve the fault positioning of the two ends of the power transmission line, is suitable for the fault positioning of the whole fault process of any fault of the power transmission line and has universal applicability.

The invention discloses a method and a system for locating a fault of a high-voltage transmission line. According to the method and the system disclosed by the invention, a current transformer is arranged at a tower needing to be located of an erected high-voltage transmission line and is used for sending acquired current information to a current signal processing unit; the current signal processing unit is used for determining whether fault current at the tower is in accordance with the load current in direction according to the current information so as to obtain a current direction result; the current direction result is sent to a remote server by a wireless unit; the remote server is used for collecting the current direction results of all towers; when the current direction results of certain two adjacent towers are both opposite, a fault point of the high-voltage transmission line can be determined to be between the two towers. Thus, the fault point of the high-voltage transmission line can be accurately located, and rapid fault location and precise overhauling are facilitated.

The invention discloses a fault traveling wave location method of multiple branch lines of a power distribution network. According to the method of the invention, traveling wave recording devices are installed at the head end of a trunk line, the tail end of the trunk line and the tail ends of the branch lines of a detected power distribution line; time for head-end reference traveling wave signals, tail-end reference traveling wave signals and fault traveling wave signals to arrive the head end of the trunk line, the tail end of the trunk line and the tail ends of the branch lines is acquired respectively through the traveling wave recording devices; based on a theory that traveling waves are transmitted according a shortest path of a line and traveling wave transmission characteristics in line faults, the branch lines are judged with different sequences according to a first condition formula and a second condition formula, and therefore, fault intervals of the multiple branch lines of the power distribution network can be determined fast and accurately; and calculation is carried out through a double-end traveling wave fault location formula, so that the positions of fault points of the lines can be located accurately. The method of the invention has the advantages of fast and accurate fault location and small calculation quantity, and can assist in shortening power outage time, decreasing a power outage range, and improving the power supply reliability of the power distribution network.

The invention discloses a 2M ring network fault diagnosis method and a 2M ring network fault diagnosis system. The method comprises the following steps of: (1) acquiring network topology information of a dynamic environmental centralized monitoring system, and respectively storing the information aiming at each 2M ring; and (2) accessing a loop gathering bus of 2M rings of the dynamic environmental centralized monitoring system, scanning the communication status of each node in the 2M ring in real time aiming at each 2M ring in the system, forming a communication interrupt node set S by all scanned communication interrupt nodes during communication abnormality, reading the network topology information corresponding to the 2M ring, analyzing and judging two fault source nodes N and P positioned at two ends of the communication interrupt node set S according to the read network topology information, obtaining a fault source node set O={N,P} and generating a fault work order. The invention can accurately and rapidly position faults, and the fault work order with clear fault information and low redundancy is generated.

The invention provides an alarm information processing method, and its kernel: screening corresponding alarm information to alarm in vibrating state. And it makes it quick and accurate to locate system failure and besides, makes normal working state of the system unable to be influenced by transmission of large amounts of information, thus achieving the purpose of improving system failure locating accuracy and system operating stability.

The invention discloses a locating device for fault discharge of a cable. The locating device is characterized by comprising an optical fiber vibration module, a sensing optical fiber, a high-voltage cable, a high-voltage pulse module, and a data acquisition system, wherein the optical fiber vibration module is connected with the sensing optical fiber and is laid along the high-voltage cable; the high-voltage pulse module outputs a pulse signal which is injected into the high-voltage cable; a vibration signal is generated at a discharge point of the high-voltage cable , and then is returned to the optical fiber vibration module through the sensing optical fiber; the data acquisition system acquires a distributed vibration signal which is measured by the optical fiber vibration module and along the cable and a synchronous pulse signal of the high-voltage pulse module and then sends the signals to a data processor which analyzes and processes the signals to obtain the specific location of the discharge point. Due to the adoption of the structure, the locating device can locate a fault accurately so as to save the human resources and reduce the waste of cable caused by maintenance, is high in fault locating speed and can locate the fault point within several minutes in case of the fault discharge of the cable so as to shorten the fault recovery time of the high-voltage cable; moreover, the device can locate a plurality of fault discharge points at the same time so as to implement a real distributed cable fault location.