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47results about How to "Taking into account the rapidity" patented technology
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Dual-motor wire-controlled complex steering system and control method thereof
PendingCN109291991ATaking into account the rapidityTaking into account the accuracyFluid steeringElectrical steeringSteering wheelSteering control
The invention provides a dual-motor wire-controlled complex steering system and a control method thereof. The dual-motor wire-controlled complex steering system comprises a steering wheel, a steeringcolumn assembly, a road sense assembly, a dual-motor steering execution device and a steering control unit, and steering control of the system is completed through an adaptive control method. According to the dual-motor wire-controlled complex steering system, integration and unification of steering performance such as larger steering torque, lower energy consumption, faster response speed can berealized, steering control parameters are adjusted automatically according to actual driving situation, uncertainty in driving environment can be better resisted, and steering accuracy and vehicle safety are ensured.
Owner:NANJING TIANHANG INST OF INTELLIGENT EQUIP CO LTD
Embedded real-time high-speed binocular vision system for moving target detection
InactiveCN104835163ATaking into account the rapidityConsider flexibilityImage analysisParallel algorithmVisual system
The invention discloses an embedded real-time high-speed binocular vision system for moving target detection. An image acquisition processing board card, an embedded man-machine interaction board card, a touch display screen and a power supply are packaged by a mechanical shell. Two high-speed cameras are used to simultaneously shoot a moving object. A binocular bracket is used to support the two cameras, and can adjust the shooting angles of the cameras. The image acquisition processing board card is used to complete an image processing algorithm, and comprises two main chips which are respectively an FPGA and a DSP, wherein the FPGA completes an image parallel algorithm, and the DSP completes an image serial algorithm. The embedded man-machine interaction board card is used to replace the PC of a traditional vision system to complete human-computer interaction. The touch display screen is used to display results and receive operation instructions of operators. The image acquisition processing board card adopts a double-main-chip structure, takes into consideration both the rapidity of an FPGA hardware implementation algorithm and the flexibility of a DSP software implementation algorithm, and makes the system more compatible and applicable to more application fields.
Owner:HUAZHONG UNIV OF SCI & TECH
Flexible direct-current high-frequency resonance suppression method based on voltage feedforward nonlinear filtering
ActiveCN109802420AImprove impedance characteristicsSuppression of high frequency resonanceProgramme controlElectric power transfer ac networkNonlinear filterVoltage amplitude
Owner:BEIJING SIFANG JIBAO AUTOMATION +1
Real-time safety evaluation method of running trends of power grid
The invention discloses a real-time safety evaluation method of the running trends of a power grid. The real-time safety evaluation method includes the following steps that internal elements of the power grid are divided; the importance degrees of the regional electricity utilizing sides are determined; the importance degrees of the regional electricity generating sides are obtained; the importance degrees of connecting lines are obtained; normalization processing is performed on the importance degrees of the regional electricity utilizing sides, the importance degrees of the regional electricity generating sides and the importance degrees of the connecting lines; unified quantization is performed on impact events of the power grid; the probabilities of any internal element of the power grid at different running trend levels are determined, and an evaluation matrix is obtained; the running trends of the internal elements of the power grid are determined. The real-time safety evaluation method can meet the requirement for rapidity of online evaluation, can guarantee the comprehensiveness of state indicators and greatly reduces the calculation amount on the premise that the calculation precision is guaranteed.
Owner:DALIAN UNIV OF TECH
Power utilization information intelligent analysis system based on Internet of Things technology
PendingCN110888913ASave on electricity billsSave energyDigital data information retrievalTechnology managementThe InternetElectric consumption
The invention discloses a power utilization information intelligent analysis system based on the Internet of Things technology. The system includes an intelligent electric meter, the intelligent electric meter is connected with the home-entry connection module. The intelligent electric meter is electrically connected with a plurality of electric appliances; the intelligent electric meter is connected with a voltage detection module, a current detection module and a harmonic detection module. The intelligent electric meter is connected with an electric quantity comparison module and a feedbackmodule. The electric quantity comparison module is connected with a historical monthly electricity consumption average value statistics module, a first threshold module and a current monthly real-timeelectricity consumption statistics module, and the electric quantity comparison module is also connected with an average value statistics module, a second threshold module and a current time period electricity consumption statistics module of historical monthly daily time period electricity consumption. The method has the beneficial effects that the electric charge can be saved for the user, theenergy can be effectively saved, the waste of electricity is reduced, and the rapidity and the reliability of judging whether the electricity load and the electricity consumption exceed the normal usecan be considered.
Owner:STATE GRID XINJIANG ELECTRIC POWER CO URUMQI ELECTRIC POWER SUPPLY CO +1
Substation direct-current power source system
ActiveCN105182148ATaking into account the rapidityTaking into account fault toleranceElectrical testingElectrical connectionEngineering
The invention relates to a direct-current power source system for supplying power for the relay protection, automatic device and remote communication device of a substation and protection of the direct-current power source system, in particular, a substation direct-current power source system with a grounding fault automatic inspection function. The substation direct-current power source system includes an inspection control module, a direct-current busbar detection module connected with the output end of the inspection and control module, a direct-current branch detection module and a line selection verification module; fault feature identification is carried out according to the state quantity of current before and after a fault, the state quantity of voltage before and after the fault and the calculation quantity of grounding resistance, and electrical connections among the state quantity of current, the state quantity of voltage and the calculation quantity of grounding resistance; a line selection verification function is integrated onto the substation direct-current power source system with a grounding inspection line selection verification mechanism through adopting a logical event driving-based automatic inspection mode; and zero drift and fault branches can be identified through calling an unbalanced bridge mode and based on logical judgment, and therefore, wrong selection or missed selection of direct-current grounding inspection devices can be fast identified.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Inrush current recognition method and low-voltage and medium-voltage quick disconnection protection method utilizing same
InactiveCN102809681ASolve the problem of protection misoperationTaking into account reliabilityCurrent/voltage measurementFault locationDistribution transformerHarmonic
The invention relates to an inrush current recognition method and a low-voltage and medium-voltage quick disconnection protection method utilizing same. The technical scheme includes that a secondary harmonic locking criterion and a locking criterion by a waveform comparison principle are adopted to judge phases or logics on the basis of self quick disconnection overcurrent criteria of a circuit (while keeping the direction and low-voltage locking selective), phase-separation locking is realized, and the inrush current recognition with a low-voltage open criterion is adopted and differentiates magnetizing inrush current from fault current of an air-dropped distribution transformer when the circuit in a power distribution network is manually closed or repeatedly closed. Accordingly, reliability of quick disconnection protection is guaranteed while speediness of the quick disconnection protection is ensured.
Owner:XJ ELECTRIC +2
Predictive control method for optimized output track of DC-DC converter discrete model
InactiveCN104656444ARealize online computingThe amount of calculation is smallAdaptive controlDc dc converterVoltage overshoot
The invention discloses a predictive control method for the optimized output track of a DC-DC converter discrete model. The predictive control method comprises the following steps: step 1, establishing a discrete predictive model of a DC-DC converter; step 2, determining the steady-state voltage and the current characteristic of the discrete predictive model; step 3, determining the objective function of the discrete predictive model; step 4, determining a predictive control strategy. The method has the simple mathematical model and small computational amount of optimization problem solving and can realize online computation of control decisions. The method can work alone in a CCM, also can work alone in a DCM, and also can work in the mixed mode of the CCM and DCM. The method can avoid the voltage overshoot phenomenon of the DC-DC converter in the starting process and also has the accuracy and fastness of the DC-DC converter for regulation of output voltage under various running conditions.
Owner:XIAN UNIV OF TECH
Unmanned aerial vehicle reservation aerial photographing method and system based on user reservation and automatic control
PendingCN108810459AEasy and fast bookingTaking into account rationalityTelevision system detailsColor television detailsParking areaAutomatic control
The invention relates to the technical field of unmanned aerial vehicles, and specifically provides an unmanned aerial vehicle reservation aerial photographing method and system based on user reservation and automatic control. The method is specifically as follows: a user submits a reservation aerial photographing request to a server through a user terminal, the server determines conditions required for the aerial photographing according to the reservation aerial photographing request, obtains state information of unmanned aerial vehicles in an unmanned aerial vehicle parking area in real time, and selects an unmanned aerial vehicle meeting the conditions required for the aerial photographing according to the obtained state information of the unmanned aerial vehicles, the server generatesan aerial photographing task according to the conditions required for the aerial photographing and allocates the aerial photographing task to the selected unmanned aerial vehicle, and the unmanned aerial vehicle flies to an aerial photographing waypoint according to a flight route, performs aerial photographing service for the user, sends video image data of the aerial photographing to the corresponding user terminal after completing the aerial photographing of the user, and returns to the unmanned aerial vehicle parking area according to the flight route. According to the method, unmanned aerial vehicle achieves multi-angle shooting, meanwhile, the unmanned aerial vehicle flight dispatching scheme is optimized, and the aerial photographing efficiency is improved.
Owner:GUANGZHOU EHANG INTELLIGENT TECH
Substation DC grounding inspection device with line selection checking mechanism
ActiveCN105242171AImprove lookup speed and fault toleranceQuickly diagnose and troubleshootFault locationInformation technology support systemEmbedded systemDC-BUS
The invention provides a substation DC grounding inspection device with a line selection checking mechanism, relating to a device or method which detects an electric fault in a cable, transmission line or a network. The invention especially relates to an inspection device for detecting a substation DC system grounding fault. The device comprises an online monitoring automatic inspection control module and a group of inspection function modules. The inspection function modules comprise a DC bus detection module, a balanced bridge detection module, an unbalanced bridge detection module, a fault branch determination module and a line selection checking module. According to the state quantities of current voltage before and after a fault and the calculation amount of a grounding resistor and the electrical association among the three members, the fault feature recognition is carried out, an automatic inspection mode based on logic event driving is employed, a line selection checking function is integrated into the substation DC grounding inspection device with the line selection checking mechanism, an unbalanced bridge mode is called through logic judgment to identify zero drift and fault branches, and the wrong selection or missed selection of a DC grounding inspection device is quickly identified.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Hydraulic supporting system-based breakable automobile stabilizer bar system
ActiveCN103213469ATaking into account the rapidityTaking into account stabilityInterconnection systemsSupporting systemSteering wheel
The invention relates to a hydraulic supporting system-based breakable automobile stabilizer bar system, which comprises a stabilizer bar, a control system and a stabilizer bar hydraulic supporting system, wherein the stabilizer bar consists of a stabilizer bar body and a stabilizer bar pull rod; the stabilizer bar hydraulic supporting system is based on controllable lock-up and switch-on and is connected to the left and right sides of the stabilizer bar body; the stabilizer bar body is connected with a suspension swing arm through the stabilizer bar pull rod; the suspension swing arm is positioned on wheels of a vehicle body fixed frame; a suspension travel sensor is positioned on a shock absorber; and the shock absorber, the wheels and a steering wheel angle sensor are fixedly arranged on thevehicle body fixed frame. The hydraulic supporting system-based breakable automobile stabilizer bar system has the beneficial effects that the stabilizer bar provides different roll stiffness according to different lateral accelerations during vehicle steering through the stabilizer bar hydraulic supporting system, so that the roll stiffness ratio of front and rear axles is changed according to the lateralacceleration of the vehicle, and the quickness and the stability of steering response are simultaneously considered by the vehicle.
Owner:ZHEJIANG WANXIANG SYST +1
Wire selection checking method of substation DC grounding inspection
ActiveCN105242163ATaking into account the rapidityTaking into account fault toleranceFault locationInformation technology support systemFault toleranceElectricity
The invention provides a wire selection checking method of substation DC grounding inspection, relating to a method for detecting an electric fault in a cable, transmission wire or network, and particularly relates to a method for detecting a substation DC system grounding fault. The method comprises the a step of using an electric bridge method to carry out bus or branch grounding inspection, a step of carrying out fault characteristic recognition according to the state amounts of current voltage before and after a fault and the calculation amount of a grounding resistor and the electrical contact of the above three amounts, an automatic inspection mode based on logic event driving is employed, the rapidness of a balance electric bridge and the fault tolerance of an unbalanced electric bridge, the search speed and a fault tolerance level are improved, and the rapid diagnosis and troubleshooting are realized. A wire selection checking function is integrated into a substation DC grounding inspection device, an unbalanced electric bridge mode is called through a logic judgment to identify a zero drift and a fault branch, the wrong selection or missed selection of the DC grounding inspection device is rapidly identified, and the performance of the inspection device is improved under the premise of not increasing hardware cost.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Substation DC power supply system with grounding inspection line selection checking mechanism
ActiveCN105244853ATaking into account fault toleranceImprove lookup speed and fault toleranceEmergency protective circuit arrangementsFault locationZero driftElectrical current
The invention provides a substation DC power supply system with a grounding inspection line selection checking mechanism, relating to a DC power supply which supplies power to the relay protection and automatic device and the telecontrol communication device of a substation and the protection of the system. The invention especially relates to the substation DC power supply system with the grounding inspection line selection checking mechanism. The system comprises an online monitoring automatic inspection control module and a group of inspection function modules. The inspection function modules comprise a DC bus detection module, a balanced bridge detection module, an unbalanced bridge detection module, a fault branch determination module and a line selection checking module. According to the state quantities of current voltage before and after a fault and the calculation amount of a grounding resistor and the electrical association among the three members, the fault feature recognition is carried out, an automatic inspection mode based on logic event driving is employed, a line selection checking function is integrated into the substation DC power supply system with the grounding inspection line selection checking mechanism, an unbalanced bridge mode is called through logic judgment to identify zero drift and fault branches, and the wrong selection or missed selection of a DC grounding inspection device is quickly identified.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Positive and negative sequence extraction method
InactiveCN108020731ATaking into account the rapidityTaking into account stabilityPhase sequence/synchronism indicationPower gridGenerating unit
The invention discloses a positive and negative sequence extraction method comprising low-pass filtering, constant-power park conversion, geometric coordinate conversion and geometric coordinate solving. The method has the same quickness as an instantaneous value analytical settlement method. The low-pass filter is added into the analytical process to deal with work conditions like harmonic, sampling error and sudden frequency change conditions, so that the good quickness and stability are realized. Positive and negative sequence components of the grid voltage are extracted quickly and stably.The method has the important significance in the new energy industry. When a grid failure occurs, an inverter is able to deal with the grid failure quickly; a corresponding reactive support is sent out or absorbed based on a corresponding requirement to realize grid recovery, so that a power generating unit passes through the grid failure successfully. The adaptability to the grid is high; stepout of the power generating unit is reduced; and thus worsening of the grid failure is avoided.
Owner:浙江日风电气股份有限公司
Single wave-piercing yacht
InactiveCN103786829ATaking into account the rapidityReduced detectabilityDefensive equipmentOffensive equipmentSeakeepingPolygonal line
A single wave-piercing yacht in the technical field of ships on water comprises a main yacht body, a mixed internally-inclining prow, a square stern and a full-closed upper-layer building. The mixed internally-inclining prow comprises a first column, a full-closed prow deck and a prow freeboard, wherein the first column is of a broken line structure, and the portion located above a waterline and the portion located under the waterline are provided with different sweepback angles. The rapidity and seakeeping of the single wave-piercing yacht are reasonably considered by using the mixed internally-inclining prow, and the yacht can easily pierce waves. By adopting the mixed internally-inclining prow and the full-closed, smooth and wave-piercing upper-layer building, the detectability is reduced, the yacht has good cloaking capacity, and meanwhile the probability that the yacht running in the waves at high speed encounters wave impact can be reduced. The controllability of a thin and long ship form is improved by adopting spray water propulsion. The single wave-piercing yacht can serve as a houseboat, a seaborne high-speed interceptor yacht and the like.
Owner:SHANGHAI JIAO TONG UNIV
Instrument for intelligently and quickly detecting flammable and combustible dangerous goods for vehicle and using method
InactiveCN110942596AShorten Diffusion TimeHigh sensitivityFuel testingAlarmsCombustible gasMoisture sensor
The invention discloses an instrument for intelligently and quickly detecting flammable and combustible dangerous goods for a vehicle and a using method, and belongs to the technical field of detection instruments. The instrument comprises a shell and a mounting plate. The mounting plate is integrally formed at the tail end of the shell. A temperature sensor, a humidity sensor, an active air suction device, a pyroelectric infrared sensor and an infrared sensor are sequentially installed at the top end of the shell from right to left. The active air suction device comprises a flammable and combustible gas sensor, an air suction fan and an air suction pipe. A display screen and an audible and visual alarm are embedded in the surface of the shell, and a CPU chip and a circuit board are installed in the shell. Compared with an existing detection method, the detection method is mature, the measurement sensitivity is improved, the pyroelectric infrared sensor is used for judging whether instrument alarm shielding is needed or not, invalid alarm is avoided, the infrared sensor is used for sensing obstacles, the measurement sensitivity when the instrument is shielded is improved, the air duct design is optimized, and the measurement sensitivity, rapidness and accuracy are considered.
Owner:FUJIAN MEIYING AUTOMATION TECH
Device capable of mounting and detecting oil discharging bolt gasket of oil pan
PendingCN108637650ALabor savingImprove stabilityUsing optical meansMetal working apparatusElectricityControl system
The invention discloses a device capable of mounting and detecting an oil discharging bolt gasket of an oil pan. The device comprises a machine body, wherein an electricity box is arranged at the bottom of the machine body; an electrical control system is arranged on one side of the machine body; a mounting clamp, a height detecting assembly, a bolt screwing assembly and a position detecting assembly are arranged on the machine body; the height detecting assembly is positioned at the upper end of one side of the mounting clamp; the bolt screwing assembly is positioned above the mounting clamp;and the mounting clamp, the height detecting assembly, the bolt screwing assembly, the position detecting assembly and the electricity box are connected with the electrical control system. The devicehas the advantages of being high in stability and detecting speed and precise in detection, improving the working efficiency and reducing the rejection rate.
Owner:GUANGDONG HONGTUNANTONGDIE CASTING
Task allocation method and device, computer equipment and readable storage medium
ActiveCN110390464APlay a role in equitable distributionConsider performanceResourcesDistribution methodComputer engineering
The invention provides a task allocation method and device, computer equipment and a readable storage medium, and the method comprises the steps: carrying out the sorting of original processors according to the number of held tasks, forming a processor queue, and always allocating the number of tasks to a newly-added processor from the original processor with the largest number of held tasks according to the processor queue. When the tasks are allocated to the newly added processors, the task number is always allocated from the original processor with the largest task number, and a fair allocation effect can be achieved; meanwhile, after the task number is allocated once, the first original processor only needs to be compared with the adjacent second original processor in the processor queue, the specific original processor with the largest task number can be determined, and the performance and rapidity of the task allocation process are both considered.
Owner:PING AN TECH (SHENZHEN) CO LTD
An automobile motor galloping fault detection device and a working method thereof
PendingCN109878342ASo as not to damageTake into account the accuracySpeed controllerElectric energy managementReliability engineeringAcceleration Unit
The invention discloses an automobile motor galloping fault detection device and a working method thereof, and the device comprises the following parts: a galloping fault monitoring module which is used for monitoring the state of an automobile motor; a galloping fault protection module used for receiving the state of the automobile motor and carrying out protection operation on the automobile motor in a galloping state. The method has the following beneficial effects that no extra hardware cost needs to be increased, and a controller and a power supply can be judged and protected from being damaged before the galloping fault reaches an uncontrollable state. Whether galloping occurs or not is judged without depending on the rotating speed, and whether galloping occurs or not is judged according to the rotating speed acceleration. And a galloping fault acceleration threshold value is obtained through an actual test table, so that the accuracy and rapidity of fault judgment are both considered. According to the galloping protection strategy, the rotating speed is prevented from continuously and rapidly rising, the rotating speed is rapidly decreased, the motor is closed after the safe rotating speed is achieved, and the safety of motor electronic control, a battery and field personnel is protected to a great extent.
Owner:江苏力信电气技术有限公司
Self-adaptive setting method and system for power distribution network based on switch grading
PendingCN113471927AProtecting Valuation DataAvoid complexityParameter calibration/settingControl theoryComputer science
The invention provides a self-adaptive setting method and system for a power distribution network based on switch grading. The method comprises the following steps: establishing a setting principle library according to the switch grade number; marking a switch configured with a protection function; acquiring switch information in the distribution network automation system, and judging whether switch displacement exists or not according to the switch information; if the switch is shifted, mapping the switch information corresponding to the shifted switch to the network topology; analyzing a network topology by taking a 10 kV outgoing line switch as a primary switch, traversing the network topology downwards, and re-grading the switch with a protection function; based on a switch re-grading result, automatically matching a setting principle in a setting principle library; and performing constant value calculation according to a setting principle matched with the switch series to generate new constant value data. The complexity of setting the distribution network equipment can be avoided, the time level difference is saved, meanwhile, the selectivity and rapidity of protection are considered, and multi-level series power supply line protection can be ensured to be matched.
Owner:STATE GRID ANHUI ELECTRIC POWER +1
A substation DC ground inspection device with line selection and verification mechanism
ActiveCN105242171BTaking into account the rapidityTaking into account fault toleranceFault locationInformation technology support systemElectrical resistance and conductanceElectricity
The invention provides a substation DC grounding inspection device with a line selection checking mechanism, relating to a device or method which detects an electric fault in a cable, transmission line or a network. The invention especially relates to an inspection device for detecting a substation DC system grounding fault. The device comprises an online monitoring automatic inspection control module and a group of inspection function modules. The inspection function modules comprise a DC bus detection module, a balanced bridge detection module, an unbalanced bridge detection module, a fault branch determination module and a line selection checking module. According to the state quantities of current voltage before and after a fault and the calculation amount of a grounding resistor and the electrical association among the three members, the fault feature recognition is carried out, an automatic inspection mode based on logic event driving is employed, a line selection checking function is integrated into the substation DC grounding inspection device with the line selection checking mechanism, an unbalanced bridge mode is called through logic judgment to identify zero drift and fault branches, and the wrong selection or missed selection of a DC grounding inspection device is quickly identified.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Wheat yellow striate virus N gene recombination expression protein, method for preparing polyclonal antibodies and application thereof
InactiveCN109797159AOvercome the shortcomings that are difficult to express normallyEasy to detectSerum immunoglobulinsImmunoglobulins against virusesEscherichia coliNew Zealand white rabbit
The invention discloses a wheat yellow striate virus N gene recombination expression protein, a method for preparing polyclonal antibodies and application thereof. The method for preparing the polyclonal antibodies includes steps of synthesizing genes by optimization codons according to sequences of N genes of WYSV (wheat yellow striate viruses) for the first time and subcloning the genes into target vectors pET-30a for expressing Escherichia coli; carrying out prokaryotic expression on recombinant proteins and immunizing New Zealand white rabbits to obtain the WYSV-N protein polyclonal antibodies. The wheat yellow striate virus N gene recombination expression protein, the method and the application have the advantages that as shown by Western blot detection, the antibodies prepared by theaid of the method can be specifically bound with toxic insect samples, and accordingly the high specificity of the obtained antibodies is illustrated; whether vector insects carry the WYSV or not canbe quickly detected by the aid of immunofluorescence detection processes under laboratory conditions, and accordingly a foundation can be laid for research on WYSV prediction and forecast and psammotettix striatus L. and WYSV interaction mechanisms.
Owner:INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
A substation DC power supply system
ActiveCN105182148BTaking into account the rapidityTaking into account fault toleranceElectrical testingPower flowRapid identification
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Variable speed horizontal elevator mechanical system
InactiveCN102259791ATake security into considerationApplicabilityEscalatorsRoad constructionCommercial area
The name of the present invention is the variable-speed horizontal elevator mechanical system. Aiming at the disadvantage that the current horizontal elevators are all designed at a uniform speed, and its speed is inconsistent with the safety of people getting on and off the elevator, it realizes the speed of the entrance section, middle section and exit section of the elevator. The free setting, the function of smooth transition between different speed sections can also realize smooth turning, so that the safety, applicability and speed of the elevator can be taken into account. In the present invention, the elevator speed is directly proportional to the distance between the crawler belts of the elevator, and the distance between the crawler belts is controlled by the slider, the slider limit guide rail and the cable mechanism. By setting the position of the slider limit guide rail, the elevator speed can be set there. The present invention can be widely used in airports, subways, railway stations, business districts, scenic spots, etc. In the future, it can also be built along the main streets of the city, making it the backbone of urban traffic together with subways and buses.
Owner:周力
An on-line monitoring device for substation DC power supply system
ActiveCN105137363BTaking into account the rapidityTaking into account fault tolerancePower supply testingRapid identificationGrounding resistance
The invention relates to an on-line monitoring device for DC power supply system of a substation, relates to a relay protection and automatic device of a substation, a DC power supply system powered by a telecontrol communication device and its protection, specifically a device with the function of automatic inspection of grounding faults The online monitoring device includes a patrol control module, a DC bus detection module connected to the output end of the patrol control module, a DC branch detection module and a line selection check module; Calculate the amount of resistance, and the electrical connection of the three, carry out fault feature identification, adopt the automatic inspection mode driven by logic events, and integrate the line selection and verification function into the substation DC power supply system with the grounding inspection line selection and verification mechanism In the process, the unbalanced bridge mode is called through logical judgment to identify zero drift and faulty branches, and quickly identify the misselection or omission of the DC grounding inspection device.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Device for detecting oil seal height and parallelism of aluminum alloy chain cover
InactiveCN106979765ALess installation damageTake care of installation damageMechanical measuring arrangementsSide chainEngineering
The invention discloses an aluminum alloy chain cover oil seal height and parallelism detection device, comprising a device body, an upper pressure cylinder is arranged above the device body, the piston rod of the upper pressure cylinder is connected to an upper movable plate through the upper plate, and the upper movable plate A linear guide rod passing through the upper plate is also connected, a number of limit posts and pressing rods are connected below the upper movable plate, a bearing platform is arranged on the bottom plate, a chain cover is installed on the bearing platform, and a pressing cylinder is arranged on the side of the chain cover. A detection cylinder is arranged on the upper side of the chain cover, and a number of displacement sensors are movably connected to the detection cylinder. The invention has the advantages of high stability, fast detection speed, good detection effect, and less damage to fittings, and also reduces labor costs, improves efficiency, and reduces the work intensity of operators.
Owner:GUANGDONG HONGTUNANTONGDIE CASTING
A wind power prediction method and system
ActiveCN108376316BReduce the number of effective scenesTake into account the accuracyResourcesSystems intergating technologiesTime correlationEngineering
The invention relates to a wind power prediction method and system. The method comprises the following steps: step one, on the basis of historical data of a wind power, carrying out scene prediction and interval prediction on a wind power within preset time periods to obtain representative scene sets and the interval prediction results of the wind power during all preset periods; step two, withinthe preset periods, screening the representative scene sets within the same periods based on the obtained interval prediction results; and step three, connecting all screened representative scene setsof all preset periods according to a time sequence to obtain a daily wind power sequence with consideration of the time correlation, and carrying out wind power prediction based on the daily wind power sequence. With the method provided by the invention, the accuracy of prediction of the wind power is improved substantially; the calculation load is reduced; and the calculation efficiency is high.The wind power prediction method and system can be applei dto the wind power prediction field widely.
Owner:STATE GRID CORP OF CHINA +2
Air conditioner control method and system
ActiveCN113757931ATaking into account the rapidityTaking into account the suppression of power oscillationMechanical apparatusPower network operation systems integrationPower oscillationSmart control
The invention relates to an air conditioner control method and system. The method comprises the steps that the conventional response number is calculated according to equivalent thermal parameters and reduction target parameters; a first aggregation power curve, conventional control duration and a maximum power reduction value are obtained according to the number of air conditioners in all the operation states in all the temperature intervals at the initial moment and a transmission model; an air conditioner cluster is controlled according to the conventional control duration and the conventional response quantity; under the current number of iterations, the number of the air conditioners in all the operation states in all the temperature intervals at the current moment is input into the transmission model, and a third aggregation power curve under the last number of iterations is obtained; according to the maximum power reduction value, the first aggregation power curve, a target reduction power curve and the third aggregation power curve under the last iteration number, intelligent control duration and intelligent response quantity under the current iteration number are obtained; and the air conditioner cluster is controlled according to the intelligent control duration and the intelligent response quantity under the current iteration number. According to the an air conditioner control method and system, rapid response of aggregation power and suppression of power oscillation can be realized at the same time.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
S-shaped feeding and withdrawing control method of locking device for servomotor of hydroelectric generating set
ActiveCN109058036AOvercome the problem of excessive impact forceImprove buffering effectHydro energy generationReaction enginesElectricityIngot
The invention provides an S-shaped feeding and withdrawing control method of a locking device for a servomotor of a hydroelectric generating set. The locking device comprises a locking servomotor, a displacement sensor positioned at the rear part of a locking bar, and hydraulic control valves connected with a feeding cavity and a withdrawing cavity separately; when the locking bar of the locking servomotor is fed or withdrawn, the locking bar does accelerated movement slowly at the start point position, rapidly moves at the middle position, and does decelerated movement when being close to thefinal point position; and the curve between the displacement of the locking bar and the time is S-shaped. Through the adoption of the S-shaped feeding and withdrawing control method, the problem thatthe impact force is too large when guide vanes of an original hydroelectric generating set are controlled to be locked is solved, the structure is simple, the curve between the displacement of the locking device and the time is S-shaped, the fact that the locking device has high buffer performance in the start point position or the final point position of feeding and withdrawing control is realized, realizes fast feeding and withdrawing control, and avoids mistaken change of the position of the locking device caused when a controller is powered on.
Owner:CHINA YANGTZE POWER
Control circuit of charging mode in USB charging stand and method thereof
ActiveCN101232196BEasy to controlImprove convenienceBatteries circuit arrangementsSecondary cells charging/dischargingCharge currentControl circuit
The invention discloses a control circuit of charging mode in USB charging base and method thereof, which is used for controlling corresponding charging mode of a USB charging base according to different USB charging input power supplies connected with the USB charging base. The control circuit comprises a charging power determination circuit arranged in the USB interface of the USB charging basefor determining the USB charging input power supply connected with the USB charging base and acquiring the type of the USB charging input power supply; and a charging management unit arranged in the USB charging base for setting charging current in a corresponding constant-current stage according to the level state of a detection pin corresponding to the USB charging input power supplied of different types, and entering corresponding charging mode. The invention can add the charging power supply determination circuit in the USB socket interface of the charging base at low cost and enter corresponding charging mode by setting a different charging current according to the different power supplies, thus achieving the control of the charging modes.
Owner:ZTE CORP
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