48results about How to "Ensure safe and reliable operation" patented technology

The invention discloses an intelligent method for monitoring and the emission of wastewater pollutant in an industrial park. The method integrates the on-line pollutant measurement, the scientific measurement of the total pollutant emission and the real-time monitoring of the abnormal conditions of pollutant emission into a whole, selects an accurate and real-time on-line measuring instrument to realize on-line and real-time monitoring of the wastewater emission condition in the industrial park, not only overcomes the disadvantages that the chemical method has long sampling interval time, is difficult to carry out the real-time monitoring to the pollutant concentration and the scientific measurement and computation to the total pollutant emission and further can not effectively monitor and supervise the excess and stealthy emission in enterprises but also can adopt measures of warning in time, closing an overrun drain pipeline, etc. when the abnormal conditions occur in the process of pollutant emission, thereby effectively guaranteeing the safe and reliable operation in a wastewater centralized treatment plant in the industrial park and in particular being suitable for the real-time monitoring of the wastewater emission and the scientific measurement and computation of the total wastewater emission of the enterprises in the industrial park.

Provided is a double-drive railway track comprehensive inspection vehicle. The double-drive railway track comprehensive inspection vehicle includes a vehicle body, a vehicle frame, a front power unit and a back power unit, wherein the vehicle body is arranged on the vehicle frame, two ends of the vehicle body are respectively provided with a main driver's cab and an auxiliary driver's cab, an inspection room and an operation room are arranged between the main driver's cab and the auxiliary driver's cab, two sides of the lower end of the vehicle frame are respectively provided with a front power bogie and a back power bogie, the front power unit provides driving power for the front power bogie, the back power unit provides driving power for the back power bogie, a diesel oil tank which is fixed at the lower end of the vehicle frame is arranged between the front power unit and the back power unit, and the vehicle frame is provided with a plurality of detection devices. The double-drive railway track comprehensive inspection vehicle is self-powered, can subject the component state of the surface structure of high speed railway track, the steel rail contour and the route limit to fast dynamic scanning, intelligent judging of states and alarming and timely master the apparent condition of high speed railway maintenance equipment so as to guide daily maintenance and guarantee the safety and reliable operation of the high speed railway.

A software management system for processing and maintaining improved reliability of software delivered on a wide-area network. A center server includes a script describing operation of the application, and a fault countermeasure unit for coping with the occurrence of a fault. A local server includes a network-directed language execution environment, a remote management unit for downloading or deleting the application, a script interpretation unit, and a highly reliable unit for recording event data that occur while the application is being executed, for managing the data when the fault has occurred, and for executing a restoration process. The system guarantees safe and reliable operation of the software that is downloaded through a wide-area network, and supports the collection of fault data and restoration even when an abnormal condition has occurred.

The invention provides a performance detecting device for an optical fiber type oil temperature sensor for a transformer. The detecting device comprises a transformer oil tank simulating device. The transformer oil tank simulating device comprises an oil tank filled with insulating oil, and a mercurial thermometer and the optical fiber type oil temperature sensor are installed on the oil tank. The mercurial thermometer and the optical fiber type oil temperature sensor are used for measuring the temperature of the insulating oil. The optical fiber type oil temperature sensor is connected with a temperature collecting system. By means of the detecting device in the technical scheme, the installation sealing performance, the temperature measurement accuracy, the fault alarming performance and the seismic resistance of the optical fiber type oil temperature sensor for the transformer can be detected, the defects that in the prior art, when an optical fiber type oil temperature measuring system is connected into a grid, detection calibration is not carried out, and performance and reliability can not be detected are overcome, and technical supports are provided for guaranteeing safe and reliable running of the transformer.

The invention discloses a DC line fault protection method based on a current converter injection characteristic signal. The method comprises the following steps: step 1: establishing a full-bridge modular multilevel current converter; step 2: when a DC line fault occurs, starting a characteristic signal injection strategy to inject the characteristic signal after a fault clearing strategy is started for a certain time, wherein the characteristic signal injection strategy can generate an identifiable characteristic signal in the line; and step 3, after the characteristic signal injection strategy is started, judging whether the fault exists through wavefront refraction. By adoption of the DC line fault protection method disclosed by the invention, permanent faults and transient faults can be quickly distinguished, when the fault is determined as the permanent fault, the fault distance can be accurately judged, and a function of fast restart of a fast arc-extinguishing fault and the non-start of the permanent fault is achieved; and by adoption of the DC line fault protection method disclosed by the invention, adaptive restart is achieved on a DC overhead line, adaptive identificationof the fault nature and the fast restart of the fast arc-extinguishing fault are achieved, the safe and reliable operation of a DC system is ensured, the power outage loss is reduced, and the directbenefit and the indirect benefit are very significant.

The invention discloses a sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method. The method includes the steps of S1, detecting whether purity of SF6 gas is up to the standard or not; S2, detecting content of impure gases in the SF6 gas; S3, selecting the decomposition characteristics of the SF6 after partial discharging for detection and identification. The sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method has the advantages that properties and characteristics of insulation defect types in SF6 equipment can be accurately known and mastered so as to specify an effective maintenance strategy and guarantee safe and reliably running of the SF6 equipment.

The invention discloses an online direct-current grounding monitoring system for a power distribution automation terminal. The system comprises a processor, a direct-current grounding monitor, an anode grounding warning signal output module, a cathode grounding warning signal output module and a power supply module. The processor is respectively connected with the direct-current grounding monitor, the anode grounding warning signal output module, the cathode grounding warning signal output module and the power supply module. The online direct-current grounding monitoring system for the power distribution automation terminal has advantages that a voltage acquisition unit acquires voltage to ground of positive and negative buses of a direct-current system in real time and transits to the processor; by control of on or off of a detection bridge relay, insulation resistance to ground of the positive and negative buses of the system can be calculated according to changes of voltage to ground of the positive and negative buses of the direct-current system, the insulation resistance of the system is compared with a warning threshold, and warning signals are output for warning, so that the problem of equipment maloperation caused by insulation decline can be effectively avoided to guarantee safety and reliability in operation of power distribution network equipment.

The invention discloses a gas water heater and a safety control system and method thereof. The system comprises an exhaust fan for exhausting waste gas produced by the gas water heater during burning,a rotary speed detecting unit for detecting the rotary speed of the exhaust fan, a power obtaining unit for obtaining an output power given value of the exhaust fan, and an exhausting control unit connected with the exhaust fan, the rotary speed detecting unit and the power obtaining unit and used for judging the air outlet air pressure situation of the exhaust fan according to the rotary speed of the exhaust fan and the output power given value of the exhaust fan and regulating the output power given value of the exhaust fan according to the air outlet air pressure situation of the exhaust fan. The system can ensure that the gas water heater has good burning conditions and ensure safe and reliable operation of the gas water heater, is high in response speed and lower in cost, can providemore accurate air volume and improves the control accuracy.

The invention provides a rail transit train traction vehicle lithium battery energy storage system comprising a power lithium battery, a battery management unit (BMU), a battery safety management unit (SCU), a remote safety monitoring unit (RSCU), and a high voltage electric part; a bottom layer electronic control unit (LECU) of the battery management unit collects battery information and carries out balance management for the battery; a battery control unit (BCU) can control the system according to battery information. The battery safety management unit verifies uploading information of the battery control unit and the bottom layer electronic control unit, can restart the battery control unit when management failure happens, and can report first level fault if the restart fails; a communication gateway in the remote safety monitoring unit receives the information uploaded by a battery pack management system, the information is displayed by a display screen, and the data is sent to a server through a remote monitoring module configured in the display screen. The rail transit train traction vehicle lithium battery energy storage system is applied to traction usage of the train in a non-electric zone, and triple safety managements can effectively ensure the system to safely and reliably operate.

The invention relates to a remove-magnetic system performance test analysis method and its test analyzer, the each loop voltage electric current of the remove-magnetic system carries on the succession process analysis, the energy distribution analysis, the volt-ampere related characteristic analysis and the frequency spectrum characteristic analysis, and demonstrates the result, the test analyzer is composed of the computer mother board, the input connection module, the signal transformation module, the monitor and the man-machine connection processor, the communication connection module, the performance analysis module, and also the printer connection module. The invention completely provided a new remove-magnetic system tester with high accuracy, multi- parameters, maturity function, simple operation, and few maintenance quantities, which can fully and accurately reflected the remove-magnetic system performance fit and unfit, effectively safeguarded the power set the security reliable moving, and promoted the remove-magnetic system technology of our country generating set have a larger scale enhancement in design, manufacture, use and so on aspect level.

The invention discloses a new energy fast frequency response control device, which comprises a communication module, a controller, a grid-connected point bus measurement module, a frequency measurement module and a human machine interaction module. The device collects voltage, current and grid frequency of the secondary side of the grid-connected point bus through the grid-connected point bus measurement module and the frequency measurement module. When the grid frequency is disturbed, real-time active power is calculated, an active power adjustment target value is calculated within a certaintime, the active power adjustment target value is issued to each power generating unit in a remote adjustment command mode through the Ethernet, and full station active power adjustment is completed.In addition, the device is connected to an AGC system, under cooperation of the AGC system, the device participates in grid fast frequency modulation, and when the grid frequency in a station exceedsa preset frequency response threshold, fast frequency modulation operation for the grid is realized, and safe and reliable operation of the power system is ensured.

The invention provides a frequency measurement method, device and system for a pumped storage unit. The method comprises the steps of obtaining control instructions of the pumped storage unit in different working modes, wherein the working modes include the water turbine direction electricity generation module and the water pump direction water pumping mode; according to the control instructions and set selection logic, selecting PT frequency measurement or toothed disc frequency measurement at different stages in each working mode. According to the frequency measurement method, device and system for the pumped storage unit, the specific frequency measurement schemes and frequency measurement measures are adopted for a special working condition to avoid error signals, the exclusive frequency measurement schemes are developed particularly for the two special working conditions of SFC dragging and electric braking halt, and safe and reliable running of the unit is ensured; meanwhile, three probes are selected in the toothed disc frequency measurement scheme for frequency measurement, the real rotating speed of the unit can be given according to the health status and switching logic of the three probes, the confidence level of the toothed disc frequency measurement is ensured, and the frequency measurement reliability of the whole unit is improved.

The invention relates to an air cooling control cabinet of an intelligent transformer and belongs to the technical field of transformer manufacture. The technical scheme comprises an intelligent controller (2), an executive component (3) and a dual power shift device (4) which are arranged in a box (1), the intelligent controller is connected with the executive component, and the dual power shift device is respectively connected with the intelligent controller and the executive component. The intelligent controller is respectively connected with a top layer oil temperature signal (5) of a transformer, a winding temperature signal (6), a transformer load signal (7) and an environment temperature signal (8). The air cooling control cabinet can achieve automatic control and intelligent adjustment of an air cooling system and achieves on-site display and long-distance functions through procedures built in the intelligent controller and the matched executive component, display screen, optical fiber communication interface and power device, an intelligent controlling box is provided with an air cooling system efficiency evaluation and threshold value warning function and an air cooling system fault intelligent diagnosis function, and safe and reliable operation of the air cooling system of the transformer can be guaranteed.

The invention discloses an intelligent grounding box detection system for cables. The intelligent grounding box detection system comprises measurement units, a DTU, a communication module and a monitoring terminal, wherein the measurement units comprise a grounding circulating current measurement unit, a cable accessory surface temperature measurement unit, a grounding box inside humidity detection unit and a box body opening-closing contact type sensor unit, and all the measurement units are integrated to the DTU through modular structures; the DTU is used for acquiring measurement data of each measurement unit, and the measurement data is transmitted to the monitoring terminal by the communication module; data processing software of the monitoring terminal reflects cable operation data in real time, and an operator analyzes the cable operation condition on the basis of the fed back data. With adoption of the intelligent grounding box detection system, reliable evidence can be provided for cable status maintenance and evaluation work, traditional manual periodic testing can be replaced, workload is reduced greatly, working efficiency of operation and maintenance is increased, and the system has great application value.

The invention discloses an air bag type pantograph closed-loop control device, comprising an air cleaner, an electrically controlled pressure regulating valve, a silencer, a reversing solenoid valve,a bow rising throttle valve, a falling bow throttle valve, a safety valve, a bow rising airbag, a pressure sensor, a bow head airbag and a control unit, wherein, the bow head airbag is connected between a carbon slide plate and a bow head bracket, the bow head airbag and the bow rising airbag are respectively connected with a reversing electromagnetic valve, and the pressure sensor is connected with an air path between the bow head airbag and the reversing electromagnetic valve. The pressure sensor, the electronically controlled pressure regulating valve and the reversing solenoid valve are respectively in signal connection with the control unit. The pressure data in the bow airbag installed between the carbon skate plate and the bow bracket is fed back to the control unit to realize the closed-loop control of pantograph-catenary contact force. The device can detect pantograph-catenary contact force in real time, and can adjust the pantograph-catenary dynamic contact force when pantograph is running at high speed according to the needs, so as to improve the quality of current collection and ensure the safe and reliable operation of the train.

The invention discloses a nuclear power plant cable mildew comprehensive treatment method. The method comprises the following steps that the mildew degree of cables is detected, and the to-be-treatedcables are determined according to the detection result; the to-be-treated cables are subjected to indentation modulus test, the usage parameters of the required dry ice cleaning equipment are calculated according to the obtained indentation modulus, the usage parameters comprise the ice feeding speed N, the dry ice spraying speed V and the dry ice spraying pressure P of the cleaning equipment, and after the equipment is set according to the obtained usage parameters of the dry ice cleaning equipment, dry ice is sprayed to the to-be-treated cables, and the to-be-treated cables are subjected tocleaning treatment. According to the nuclear power plant cable mildew comprehensive treatment method, the usage parameters of the proper dry ice cleaning equipment can be calculated and set, the usage amount of the required cleaning materials can be accurately set, the optimal cleaning effect and the minimum damage to the cable sheaths are guaranteed, time and labor are saved, and the method is convenient and efficient; the treatment method is a set of comprehensive moldy cable treatment system, and the safe and reliable operation of the cables of a nuclear power plant is effectively guaranteed.

The invention relates to a safety control method for a vertical shaft grab bucket hoisting system and a control system of the safety control method. The method comprises the following steps: transmitting construction site images of the grab bucket hoisting system through a video monitoring device; in the video monitoring device, recording the construction site images through a video camera which operates together with a crown block by which the grab bucket hoisting system is driven, and transmitting the construction site images recorded by the video camera to a synview and a monitor sequentially through a video cable. Compared with the prior art, the safety control method and the control system thereof effectively solve the problem of safety hazard in the operation of a conventional grab bucket hoisting system, are low in manufacturing cost, are recyclable, are easy to maintain, provide adequate security for safe operation of the grab bucket hoisting system, effectively prevent accident, and guarantee safe and reliable operation of hoisting equipment, thereby being suitable for popularization and application in the fields of crane machinery in urban subway construction and other relative fields.

The invention discloses a system and a method for monitoring leakage current and dielectric loss in a cable in real time, and relates to the technical field of cable monitoring, the cable is provided with a cable sheath and joints, the number of the joints is greater than or equal to 0 and is an integer, and when the joints are zero, one end of the cable sheath is grounded through a grounding switch, and the other end of the cable sheath is grounded through a current sensor; when the connector on the cable sheath is 1, the two ends of the cable sheath are grounded, and the connector is grounded after passing through a current sensor; and when the joint on the cable sheath is greater than 1, one end of the cable sheath is grounded through the grounding switch, the other end of the cable sheath is grounded through the current sensor, and all joints are grounded through the current sensor. The leakage current in the cable can be monitored in real time, the dielectric loss is calculated, the cost is low, and power failure can be avoided.

The invention discloses a cable telescopic holder. The cable telescopic holder comprises a telescopic frame with a closed rhombus telescopic unit and a support arranged at the end portion of the telescopic frame. The support is fixedly provided with a limiting device for limiting the rotation angle of a first connecting rod located at the end portion of the telescopic frame. Due to the action of the limiting device, the rotation angle of the first connecting rod at the end portion of the telescopic frame can be limited, and therefore the cable telescopic holder can stretch and contract within the safe rotation angle range of the first connecting rod, excessive stretching and extruding of a cable are avoided, and safe and reliable running of equipment and a system is guaranteed. The invention further discloses a grate cleaning crusher comprising the above cable telescopic holder. When the grate cleaning crusher works, the cable telescopic holder can freely stretch and contract, excessive stretching and extruding of the cable are avoided, and accordingly safe and reliable running of the grate cleaning crusher is guaranteed

The invention discloses an alarm and abnormity analysis processing method suitable for a photovoltaic power station, and the method comprises an intelligent operation management platform which is provided with a diagnosis alarm module and a vehicle alarm module. The intelligent operation and management platform analyzes, studies and judges information such as phase current, phase voltage, line current and generating capacity of various devices transferred from the Internet of Things through real-time consumption, and forms a diagnosis alarm module knowledge base according to abnormal characteristics of data sent after the device breaks down and knowledge and experience judgment of operation and maintenance experts. By collecting operation data of a string, a gateway meter, an inverter, a box transformer substation and a combiner box, through calculation and analysis of a photovoltaic power station alarm system and basic data of a knowledge base, an alarm equipment reason and a maintenance strategy are finally obtained, the data are displayed through a foreground interface, and then operation and maintenance personnel are guided to carry out maintenance and repair on related equipment. Safe and reliable operation of power station equipment is guaranteed, the failure rate of the power station equipment is reduced, and good economic benefits are achieved.

The embodiment of the invention discloses a high-frequency equivalent circuit and a modeling method and device of the high-frequency equivalent circuit. The circuit is characterized in that an equivalent resistor, an equivalent capacitor and a drain parasitic inductor are connected in series and are connected in parallel with an absorption circuit formed by connecting a parasitic inductor, an absorption resistor and an absorption capacitor in series, and then an upper tube is connected in series to conduct the equivalent resistor, a power loop parasitic inductor, a direct-current link equivalent series resistor, a power supply, a power loop resistor and a shunt resistor. According to the invention, the problems of serious voltage overshoot, extra power loss, electromagnetic interference noise, even device breakdown and system reliability reduction caused by large oscillation of a Cascode type GaN device under high switching frequency in the prior art are solved; the technical effects of quantitatively suppressing switching oscillation and matching oscillation suppression parameters, ensuring safe and reliable operation of the GaN device and fully exerting the high-frequency switching characteristic of the GaN power device are achieved.

The invention relates to a neural network-based power transmission line insulator pollution grade determination method, and belongs to the field of power transmission line insulator detection. The method comprises the following steps: S1, building an insulator pollution degree experiment platform; S2, carrying out an artificial pollution experiment; S3, preprocessing data; S4, establishing a neural network model; S5, conducting model training and verification; and S6, determining the pollution grade. The invention provides a neural network model which comprehensively considers correction of multiple environmental parameters such as temperature, humidity and air pressure, and also provides a power transmission line insulator pollution grade judgment method based on the neural network model,so that the accuracy and reliability of insulator pollution degree monitoring can be effectively improved. Therefore, safe and reliable operation of the power transmission line is ensured.

The invention relates to a connector specially for a substation grounding wire ground end, which comprises a body, a movable chuck, a shoulder screw, a screw column, a grounding wire copper nose, a bolt, an operation handle, a program lock, a shaft, an operation handle fixing groove, a linked nut I, a coupling nut, a supporting groove, a lock hole, a fixing hole, an operation handle lock hole, a connection hole I, a grounding wire connection hole, a dent, a groove, a linked nut II, and a connection hole II, wherein the shoulder screw is arranged in the connection hole II via the linked nut II; the screw column is arranged in the dent via the coupling nut to enable the shoulder screw and the movable chuck to be connected; the linked nut I, the linked nut II and the body are connected; the operation handle is arranged in the supporting groove, and the shaft is connected with the operation handle via the fixing hole and the connection hole; the program lock locks the operation handle via the lock hole and the operation handle lock hole; and the operation handle can be embedded in the operation handle fixing groove only when the program lock is opened to execute forward and backward rotation operation. Compared with the prior art, the connector specially for the substation grounding wire ground end of the invention has the advantages of simple structure, simple and convenient operation, reliable and firm performance and the like.

The invention discloses a three-phase inverter control device and method based on virtual output impedance, which is characterized in that it includes a three-phase inverter main circuit, a switch for grid connection, a grid module, and a current measurement module; Including output virtual active power calculation module, output virtual reactive power calculation module, modulation signal calculation module, modulation module, frequency-active power droop control adjustment module, voltage-reactive power droop control adjustment module, power conversion calculation module, inverter The output voltage phase of the generator is synchronized with the grid phase adjustment module, the output virtual voltage phase calculation module, the output virtual voltage amplitude calculation module and the virtual voltage synthesis module. The beneficial effects achieved by the present invention: the present invention realizes the operation of single and multiple inverter parallel systems in the grid-connected mode and the off-grid mode, and realizes the seamless switching function of the off-grid and grid-connected modes, ensuring the inverter The inverter system operates safely and reliably.

The invention discloses an aero-engine sensor fault self-diagnosis method based on a neural network, and belongs to the field of aero-engine sensor fault diagnosis, and the method comprises the following steps: building an aero-engine component-level model, and collecting a sensor historical parameter database; designing a probability distribution function prediction model based on the neural network; designing a time sequence fault classification model based on the neural network; and in combination with the probability distribution mutation prediction model and the sensor fault classification model, constructing a sensor fault self-diagnosis framework, and realizing sensor fault self-diagnosis of the turbofan engine by adopting the constructed fault self-diagnosis framework. The method aims at solving the problem of fault diagnosis under the condition that a sensor can only access local historical data of the sensor, probability estimation is achieved through a neural network to solve the problems of uncertainty and randomness under the condition that information is incomplete, and feature extraction is conducted on time sequence data of the sensor to achieve fault classification.

The invention relates to an intelligent digital temperature-humidity controller, which can simultaneously realize the precise measurement and control of temperature and humidity of a field working environment, and comprises a controller main body, wherein the controller main body comprises a single chip, the single chip is respectively connected with two circuits of temperature sensors and two circuits of humidity sensors, the temperature sensors and the humidity sensors are connected with a probe, the single chip is also connected with an alarming circuit, the alarming circuit is provided with two circuits of loads, the controller main body is also provided with a digital liquid crystal display screen and a luminous diode, and the controller main body is provided with a communication interface.

The invention is suitable for the field of robots, and discloses a driving device for an automatic guided vehicle, the automatic guided vehicle and a robot. The driving device for the automatic guided vehicle comprises a bottom plate, a driving wheel, a driving motor, a speed reducer which is in transmission connection between the driving motor and the driving wheel; wherein a first encoder which is arranged on the speed reducer and is used for monitoring the output rotating speed of the speed reducer, the speed reducer and/or the driving motor are/is installed on the bottom plate, and the speed reducer and the first encoder are both arranged between the center of the bottom plate and the driving wheel. In the invention, motion information of the driving wheel is indirectly monitored by adopting the first encoder mounted on the speed reducer, and the speed reducer and the first encoder are both arranged on the axial inner side of the driving wheel, so that the first encoder can be protected; therefore, a problem that the first encoder collides with the obstacle to be damaged when the automatic guided vehicle walks is effectively avoided, and then the safety and reliability of the automatic guided vehicle and the robot are improved.