45results about How to "Narrow down the scope of failure" patented technology

The invention discloses a chain multi-port grid-connected interface device comprising a commutation chain. The commutation chain is formed by at least two submodule units connected in series in the same direction. The chain multi-port grid-connected interface device further comprises at least one DC converter and at least one DC-AC converter. One end of each DC converter is connected with a DC end of the corresponding submodule unit, and the other end of the DC converter is defined as a DC interaction port of the grid-connected interface device. A DC connection end of each DC-AC converter is connected with a DC end of the corresponding submodule unit, and an AC connection end of the DC-AC converter is defined as an AC interaction port of the grid-connected interface device. The invention also includes a control method using the above chain multi-port grid-connected interface device. The chain multi-port grid-connected interface device of the invention provides the plurality of independent ports for the connection with a low-voltage power supply, a load and an energy storage unit and achieves plug and play, thereby greatly reducing the implementation difficulty and cost.

The invention discloses an outdoor online monitoring system for trackside equipment. The system comprises a data acquisition unit, a data transmission unit and a PLC protocol converter, wherein the data acquisition unit is used for collecting a frequency shift signal parameter, track circuit voltage, a signal lighting loop parameter, a turnout switch machine action and a notch characteristic parameter of a track circuit; the data transmission unit is used for transmitting data collected by the data acquisition unit to the PLC protocol converter through an LPLC channel; and the PLC protocol converter is used for carrying out protocol conversion, transmitting the converted data to a communication interface extension and transmitting the data to a signal centralized monitoring station machine through the communication interface extension. According to the system, the technical effects of reducing the communication fault coverage, improving the reliability of the outdoor online monitoring system for the trackside equipment and improving the monitoring efficiency are realized.

The invention discloses an equipment port failure detecting and positioning method and an equipment port failure detecting and positioning system, which are used for improving port failure detecting and positioning efficiency. According to the method, after a first port and a second port are connected through a physical transmission medium, a first node of a self-starting loop is set if the amount of error messages received by the first port exceeds a preset threshold; the first port or the second port sends the data massages with the preset amount to an opposite port; if the first port is used for sending massage to the opposite port and the error massage is received, the fault in a link between the first node and an MAC (Media Access Control) chip of the first port is determined; and otherwise, the fault in a link between the first node and an MAC chip of the second port is determined; and if the second port is used for sending the message to the opposite port and the error message is received, the fault of the link between the first node and the MAC chip of the second port is determined, and otherwise, the fault of the link between the first node and the MAC chip of the first port is determined.

The invention discloses an automatic auxiliary analysis method and system for service failures of optical transmission equipment. The method comprises the following steps: acquiring log data of each subnet, and extracting failure information based on a failure information filtering rule; judging and extracting abnormal service information; establishing an incidence relation between the failure information and the abnormal service information based on attribute characteristics of the failure information and the abnormal service information; and performing common path analysis on the extracted failure information and the abnormal service information based on the incidence relation. According to the automatic auxiliary analysis method for the service failures of the optical transmission equipment provided by the invention, the failure information and failure services are subjected to multi-dimensional correlation and are comprehensively presented, thus network failures can be accurately grasped by the operation and maintenance personnel.

Disclosed is a single power supply 10-kilovolt circuit protection three-stage configuration and fixed value setting method. Two section switches are arranged on a 10kV circuit main line, and three-stage protection configuration is performed for protecting a circuit with a length of greater than 6km; the circuit distance of three-stage switches is not less than 2km; a second-stage switch and the third-stage switch on the main line are positioned close to positions of three dividing points on the main line; and then the first-stage switch, the second-stage switch and the third-stage switch are subjected to protection fixed value setting, and reclosure is set. The three-stage protection configuration and fixed value setting method for the 10kV single power supply circuit powered by 110kV and 220kV is proposed; the circuits of each stage of protection fixed values is set by the setting method, so that complete protection matching of circuit sections can be realized; in faults, a fault range can be greatly reduced; and by matching with reclosure setting, a fault-less region can be recovered within the shortest time.

The invention discloses a high-frequency trail transmission positioning system and a positioning method. The high-frequency trail transmission positioning method comprises the following steps: a signal output end transmits test signals at least containing AC signals in a set frequency to a to-be-tested line; a signal detection end is close to the to-be-tested line, the AC signals in the set frequency in the to-be-tested line are sensed, and detection signals are obtained; the detection signals are processed to obtain detection data and position information; the detection data and the positioninformation are transmitted to a mobile terminal; the mobile terminal receives the detection data and the position information; the mobile terminal compares the detection data and a preset value; andif the detection data are consistent with the preset value, the mobile terminal generates fault signals, and the fault signals and the corresponding position information are outputted. The high-frequency trail transmission positioning method can quickly and accurately check a fault point, fault checking by manual line patrol is not needed, and the fault checking efficiency is improved.

The invention discloses a PCBA short-circuit point detection method. The method comprises the following steps: selecting a circuit network, setting a base point, setting a measurement point, selectinga measurement instrument, selecting accessories, measuring resistance, judging resistance, updating the measurement point according to the resistance, comparing the distance between the measurement points, judging a short-circuit region, repeatedly detecting and obtaining a final conclusion. The beneficial effects of the invention are that: a plurality of measurement points are arranged; the fault range can be quickly reduced, thus improving detection efficiency, and the frequency required by detection is reduced; accessory with consistent specification, the consistency of influence factors of accessories can be ensured; the detection method is advantaged in that the same external influence on different areas during detection is guaranteed, detection precision is improved, through settingmultiple times of detection, multiple times of detection results are integrated, detection correctness is guaranteed, detection accuracy is improved, short circuit points do not need to be checked one by one, and printed circuit board short circuit point detection efficiency is improved.

The invention, which belongs to the field of gas turbine fault diagnosis, relates to a gas turbine fault diagnosis method and device. The method comprises the steps that: thermal performance parameters of each component in multiple components of a gas turbine are obtained, wherein the multiple components comprise a gas compressor, a combustion chamber and a turbine; mechanical vibration parametersof each unit in a plurality of units included in each component, wherein the mechanical vibration parameters are obtained according to vibration signals output by an acceleration sensors, each unit is provided with one acceleration sensor, and the plurality of units including blades, bearings and rotors; a faulty component is determined according to the obtained thermal performance parameter of each component; a fault unit is determined according to the mechanical vibration parameters of each unit of the faulty component, wherein the fault unit is a unit having a fault in a plurality of unitsincluded in by the faulty component. Therefore, a problem of low diagnosis precision of gas turbine fault diagnosis in related technologies is solved; the diagnosis precision of gas turbine fault diagnosis is improved, and the gas turbine fault diagnosis method and device are used for diagnosing gas turbine faults.

The invention discloses a fault positioning method for gas insulated switchgear equipment, wherein the method comprises the steps: carrying out fault partitioning on GIS equipment, and dividing the GIS equipment into 10 fault areas; processing the gas data of different fault areas according to a sliding time window; dividing the gas data of the different fault areas subjected to sliding processing into training sets and a test set according to the proportions of 80% and 20%; determining initial parameters of a neural network; building a CNN-LSTM neural network model; preprocessing the training set data and then sending the data into the neural network model for training; calculating gradient values of internal parameters of the neural network through error back propagation; updating neural network parameters through an optimization algorithm, repeating iteration until the loss function is reduced to a set value, and ending neural network model training; and determining the precision of the CNN-LSTM model through the change of the number of the training sets and the test of the test set. The technical problems of complex work, low positioning precision and the like existing in GIS fault positioning are solved.

The invention provides a whole body surface contamination monitor and an over-voltage protection method of the whole body surface contamination monitor. An over-voltage protection device is connected to each output interface of a power supply of the whole body surface contamination monitor in series, when it is detected that a current voltage output by the corresponding output interface exceeds a preset voltage threshold value, only the corresponding output interface of the power supply is controlled to be disconnected from a corresponding connecting device, the failure range is reduced, maintenance staff can quickly troubleshoot failure devices accordingly, the failure processing speed is greatly increased, failure time is shortened, and therefore detection efficiency is improved.

A method and system for automatically positioning failure, which contains executing warning relativity analysis to obtain origin resulting in warning, obtaining the all reason resulting in warning, determining whether the failure reason resulting in the failure by matching the practical test result with expected result of test action.

The invention discloses IO equipment and a microcomputer protection device in the technical field of power system automation, and the IO equipment comprises a core board and an extensible bottom board, the core board is connected with the extensible bottom board through a data line, receives external data collected by circuits with different functions, and transmits the external data to the extensible bottom board through a data line; a control command is sent to the circuit execution units with different functions, and the extensible bottom plate is matched with the core plate to complete data input, output and isolation. Various changes can be achieved according to requirements, expandability is high, IO equipment with new characteristics can be added only by designing an expansion bottom plate, and the development scale can be reduced.

The invention provides a multi-line electric leakage synchronous detection device of 220V alternating current lines. The multi-line electric leakage synchronous detection device comprises a plurality of single electric leakage signal sampling circuits connected in parallel and connected with a main control unit. Each sampling circuit comprises a current transformer, a signal amplification and processing module and a signal conversion processing module and is connected with a data transmission, recording and management module, wherein the signal amplification and processing module comprises an amplifier circuit, and a resistance-capacitance filter circuit; the signal conversion processing module employs an ADC branch control unit; the current transformer, the amplifier circuit, the filter circuit, the ADC branch control unit and the main control unit are connected successively. The main control unit is connected with a clock circuit and a displayer. The device can completely record and store the dynamic state electric leakage current and the corresponding electric leakage occurrence time of each power supply line in real time, provide accurate and reliable maintenance information, furthest narrow the line fault coverage and improve the accuracy and efficiency of line maintenance.

The invention provides a self-healing capacitor element which comprises a shell body, wherein a cylinder formed by at least two layers of metallized films in a wound mode is arranged in the shell body in a closed mode. Two ends of the cylinder are connected with a first electrode and a second electrode respectively, the metallized films at least comprise a flat type metallized film layer and an isolated type metallized film layer, and at least one flat type metallized film layer is arranged between two adjacent isolated type metallized films. Due to the fact that the adopted isolated metallized films carry out isolation and partition on the flat type metallized films, electric damage of single-point healing to peripheral regions is reduced, the fault area of a capacitor is shortened, and energy in healing is also limited. Therefore, self-healing failure is greatly reduced or eliminated, self-healing performance is improved, operating safety of the capacitor is guaranteed, and the service life is prolonged.

The invention discloses a transmission line malfunction monitoring auxiliary device, comprising an electrical signal acquisition circuit, a phase conversion circuit, an alternating-direct current conversion circuit and a comparison output circuit which are electrically connected in sequence, wherein the electrical signal acquisition circuit is used for collecting a secondary phase current and a secondary phase voltage; the phase conversion circuit is used for performing phase conversion on the collected secondary phase current to obtain a first voltage vector U after phase conversion, and performing reduction voltage on the collected corresponding secondary phase voltage to obtain a second voltage vector U' after reduction voltage; the alternating-direct current conversion circuit is used for performing rectification on a vector U+U' and a vector U-U' to respectively obtain a first direct current voltage U2 and a second direct current voltage U3; the comparison output circuit is used for comparing the first direct current voltage U2 and the second direct current voltage U3, and outputting an electric signal to an external monitoring terminal according to a comparative result. On basis of the original protection device, according to the scheme, the time for recovering the power supply of regions without malfunction is effectively shortened, and the malfunction scope is effectively shrunk.

The invention discloses a power distribution line fault positioning method. Data information of existing scheduling automation, distribution network automation, measurement automation systems and thelike is sufficiently utilized, and acquired data is subjected to comprehensive analysis to rapidly reduce a power distribution line fault range, so that a fault position is rapidly and accurately positioned. The power distribution line fault positioning method disclosed by the invention is simple in positioning process and feasible; a positioning result of the fault position is high and the methodis convenient for wide popularization and application.

The invention discloses a substation power system and fire-fighting system information fused interaction control device. Automatic data information of a substation power system and information of a traditional firefighting automatic system of a substation are collected, fused and normalized, so that fire alarm of the transformer substation can be realized more accurately and comprehensively, corresponding firefighting equipment in the substation can be started to control the fire when the traditional firefighting automatic system is started for mistake or fails in starting, and thus, operationcondition of electrical equipment in the substation is protected and controlled. The substation power system and fire-fighting system information fused interaction control device meets the requirements of a load transformer substation power system monitoring specification and a fire-fighting automatic control system, can realize active fire fighting by the power automatic system of the substation, and ensures stable operation.

The invention discloses a degaussing switch mistrip-out detecting system comprising an original circuit, an opening coil 41TC, and an electric counter coil JSQHC, and characterized in that the openingcoil 41TC is connected in parallel with the electric counter coil JSQHC while the opening circuit of the original circuit is not changed; the control voltage of the opening circuit is DC 220V; the electric counter coil JSQHC has operating voltage of 121V and coil resistance of 16.9K[omega]; the electric counter coil JSQHC has operating voltage of 103V and total resistance is 78.5[omega] after being connected in parallel with the opening coil. The degaussing switch mistrip-out detecting system is reasonable in counter installation position, simple in wiring, easy to implement, and improves thereliability of the correct opening of the switch.

Disclosed is a single power supply 10-kilovolt circuit protection three-stage configuration and fixed value setting method. Two section switches are arranged on a 10kV circuit main line, and three-stage protection configuration is performed for protecting a circuit with a length of greater than 6km; the circuit distance of three-stage switches is not less than 2km; a second-stage switch and the third-stage switch on the main line are positioned close to positions of three dividing points on the main line; and then the first-stage switch, the second-stage switch and the third-stage switch are subjected to protection fixed value setting, and reclosure is set. The three-stage protection configuration and fixed value setting method for the 10kV single power supply circuit powered by 110kV and 220kV is proposed; the circuits of each stage of protection fixed values is set by the setting method, so that complete protection matching of circuit sections can be realized; in faults, a fault range can be greatly reduced; and by matching with reclosure setting, a fault-less region can be recovered within the shortest time.

A test method for eliminating software abnormalities of gas water heaters, characterized in that: 1. Building a communication platform; 2. Establishing a database, and writing test regulations into the database; 3. Turning on the upper computer and connecting to the database; 4. Writing the software failure rate reference value β, select the regulations and the number of tests n; 5. Determine whether the number of tests j is greater than or equal to n, if yes, go to step 7; ; Seven, statistical failure rate k; Eight: output test results: a, failure rate k=0%, software is normal; b, failure rate k=100%, software failure; c, failure rate 0%≤k≤β and every If the faults are the same, there are other abnormal conditions; d, the failure rate is 0%≤k≤β and each fault is different, then start troubleshooting from the software; e, β≤k≤100%, then start troubleshooting from the software. The invention has the advantages of reducing the range of possible failures of the gas water heater, thereby shortening the test period and improving the test efficiency, which is of great significance to the entire development and design process of the gas water heater.

The invention relates to a fault location method, system and medium of a traction network based on a transient sudden change current, obtains a set of measured currents in each district, and obtains a set of sudden changes in each district; Set, judge whether there is a line short-circuit fault, and find out at least one potential fault area; obtain the target fault area, fault location index, and the difference between the transient mutation accumulation current of the cross-connection line in each potential fault area in turn The difference between the accumulated current and the transient sudden change of the cross-connection line on the opposite side; and then calculate the target fault distance in each potential fault area; obtain the fault distance measurement result of the traction network to be tested according to all target fault distances. The present invention determines the section where the fault is located based on the abrupt current in the transient quantity, and accurately calculates the distance from the fault to the traction station, and realizes the fault detection of different lines of the full-parallel AT traction system in the manner of local communication and distributed fault processing High-precision fault location.

The invention relates to the technical field of intelligent circuit breakers, and discloses a fault indication unit which comprises a data acquisition module, an intelligent identification module, an electronic control module, an adjustment module, a signal display module and an opening and closing module. The fault range of the intelligent circuit breaker is narrowed, the fault reason of the intelligent circuit breaker is determined, the signal display module broadcasts the fault reason in real time according to the fault information, and flickers and sounds an alarm lamp, so that a worker can timely master which part of the intelligent circuit breaker has a fault, the intelligent circuit breaker is convenient to maintain, and the working efficiency is improved. A large amount of troubleshooting of fault reasons of the intelligent circuit breaker is avoided, low-speed disconnection when the current is small and high-speed disconnection when the current is large are adjusted through the adjusting module, so that the optimal disconnection effect in electrical and mechanical properties is obtained, motion characteristics adaptive to the current system working state are obtained, and the working performance of the intelligent circuit breaker is ensured.

The invention discloses a power transmission network topology optimization method, which comprises the following steps of constructing a power transmission network topology optimization model by taking minimum load balance and switching action times before and after power transmission network topology optimization as optimization targets and comprehensively considering eight boundary constraint conditions of topology optimization, acquiring operation data of the power transmission network in real time, and inputting the acquired operation data of the power transmission network into the power transmission network topology optimization model, and calculating and outputting the optimized network topology and switch state by the model. According to the power transmission network topology optimization model constructed by the invention, the network topology structure output according to the power transmission network operation data obtained in real time is more reasonable, and the power transmission network fault range and power failure time are reduced, and the network loss of the power transmission network in a normal state is reduced; and therefore, the reasonability of power flow distribution of the power transmission network is improved, and the operation safety of the power transmission system has high application value.

The invention discloses a helicopter hydraulic steering engine tester and a testing method, which belong to the technical field of steering engine test. The tester comprises a box body and a main circuit, the input end of an input unit of the main circuit is used for being connected with a power supply on a helicopter, and the output end of the input unit of the main circuit is connected with oneend of each indication unit; the other end of each indication unit is connected with an output unit; the input end of a voltage regulation unit is connected with the input unit, the output end of thevoltage regulation unit is connected with one end of a polarity selection switch, the other end of the polarity selection switch is connected with one end of each servo valve switch, and the other endof each servo valve switch is connected with the corresponding end of the output unit; the first input end of each balancing valve switch is connected with the output end of the voltage regulation unit, the second input end of each balancing valve switch is connected with the other end of the polarity selection switch, and the output end of each balancing valve switch is connected with the corresponding end of the output unit. The tester has the advantages of simple structure, simplicity and convenience in operation, safety, reliability, high test efficiency and the like.

The invention discloses a conventional direct-current valve area fault positioning method. The method comprises the following steps: firstly, constructing a linear rectification function according to the one-way conduction characteristic of a thyristor; constructing criteria corresponding to different areas of the valve area according to the Kirchhoff's current law by utilizing the valve area measuring points, and judging the specific position of the valve area fault according to the differential flow calculated according to the criteria; and reducing misjudgment by further utilizing the conduction time sequence of the converter valve and the existing protection, and reducing the fault range defined by the method. The partitions corresponding to the criterion are accurate to the phase by using the conduction time sequence of the converter valve, and the adverse effect of commutation failure on criterion use is eliminated by combining the existing direct current protection. In the analysis of an actual fault event, the valve area fault positioning algorithm provided by the invention gives a valve area fault positioning result which is accurate to the phase. Analysis and simulation tests show that the method has practical value.

The invention discloses a ground over-phase-splitting fault processing method, comprising the following steps: S01, during the running of the train, detecting the fault of the ground over-phase-splitting device in real time; S02, disconnecting the The connection between the fault ground over-phase device and the substation. The invention also discloses a ground over-phase fault processing system, including: a fault detection module, used for real-time detection of the fault of the ground over-phase device during train operation; and a fault processing module, used for detecting the ground over-phase When the phase device fails, disconnect the connection between the faulty ground and the substation between the phase device and the substation. The ground excessive phase separation fault processing method and system of the present invention have the advantages of high safety and reliability.

The invention discloses a QT-based sodium-sulfur battery management system, which monitors the operating state of the sodium-sulfur battery on the interface of a host computer by collecting information such as the voltage and temperature of a sodium-sulfur battery in real time; specifically, according to the sodium-sulfur battery According to the operation state of the sulfur battery, different operation strategies are implemented. When the battery operation state is abnormal, the relay protection device is activated to protect the operation safety of the system; when the battery operation state is normal, the battery is charged according to the pre-established operation strategy. Discharge and battery temperature rise and fall control, and finally through the real-time monitoring of the working status of the sodium-sulfur battery pack by the host computer, the management and protection of the sodium-sulfur battery operation are realized.

The invention discloses a phase-shifting transformer system which comprises a series branch and a parallel branch. The series branch comprises a seventh isolation disconnecting link, a sixth breaker, a phase shifter body, a ninth breaker and a tenth isolation disconnecting link which are sequentially in serial connection, wherein an eighth grounded disconnecting link is installed between the sixth breaker and the phase shifter body, and an eleventh grounded disconnecting link is installed between the phase shifter body and the ninth breaker; and the parallel branch comprises a second isolation disconnecting link, a bypass breaker and a fourth isolation disconnecting link, wherein a third grounded disconnecting link is installed between the second isolation disconnecting link and the bypass breaker, and a fifth grounded disconnecting link is installed between the bypass breaker and the fourth isolation disconnecting link. The phase-shitting transformer system is capable of meeting the requirement for switching different operation manners of a phase shifter system during normal operation of the phase-shitting transformer system, and guaranteeing the fact that a phase shifter can quickly exit from an electrical power system and is free from affecting normal operation of lines during failure of the phase-shitting transformer system so that safe reliability of the electrical power system is guaranteed. The invention further discloses a control method of the phase-shifting transformer system.