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89results about How to "Will not affect the operation" patented technology

Method and system for detecting and identifying rotating speed of wind power generation set

The invention discloses a method and a system for detecting and identifying the rotating speed of a wind power generation set. The method comprises the steps of measuring generator bearing pedestal vibration acceleration signals of the wind power generation set, firstly moving a trend item in the signals, and carrying out band-pass filtering, wherein upper and lower cutoff frequencies of the filter pass band respectively take the lowest and the highest rotating frequencies of a generator shaft of the double-fed wind power generation set; carrying out singular value noise reduction processing on filtered signals, and bringing forward a prominent rotating frequency component in the band-pass signals; and finally, carrying out discrete Fourier transform on the filter and denoised signals, and acquiring an estimated value of the rotor rotating frequency by using an interpolation Fourier transform method. According to the method disclosed by the invention, precise estimation for the generator rotor rotating frequency can be given, necessary rotating speed information is provided for fault feature extraction of different components, and rotor rotating speed signals are acquired without installing a rotating speed measurement system, thereby simplifying a vibration monitoring system, reducing the system cost, and being easy for engineering implementation.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1

High-availability industrial Ethernet redundancy method

The invention relates to a high-availability industrial Ethernet redundancy method, which comprises the following steps: adding a link redundancy entity on an original data link layer of the Ethernet for managing the sending and receiving of data frames of the Ethernet; setting two network adapter drivers relative to an original protocol stack for managing two network adapter interfaces; connecting a double-connected node which comprises the link redundancy entity and the two network adapter drivers to two independent networks respectively through two network adapters; adding a redundancy control tracker for the data frames on the link redundancy entity for distinguishing the data frames with the same content; sending the data frames which have the same content and is provided with the redundancy control tracker to two mutually-independent networks by the double-connected node through the two network adapters; keeping effective frames and discarding copy frames; and setting up a node table. The method has the characteristics of transparency, self-healing property and compatibility and the like; and the reconstruction thereof is simple, and the safety performance of the system is increased so as to enable the system to have high usability.
Owner:MICROCYBER CORP

Battery system and electric automobile with same and energy storage system

The invention discloses a battery system. The battery system comprises multiple power supply loops which are arranged in parallel, each power supply loop is provided with multiple battery packs which are connected in series, and each power supply loop is set to be capable of supplying power or cutting off power supply to electric equipment under the control of a control unit. The invention further provides an electric automobile with the battery system, especially, a power lithium battery system or other rechargeable secondary battery systems. The battery system can also be applied to various energy storage systems. By means of the battery system and the electric automobile with the same, the problems of the battery system in the aspects such as reliability, safety, cooling and heating properties and battery protection are effectively solved.
Owner:曾丹玢

Welding process method of brass H62

The invention discloses a welding process method of brass H62, which uses a welding wire Scu6810A and a soldering flux CJ301, and uses a manual argon tungsten-arc welding method. The welding process method of the brass H62 comprises the following steps of: firstly, machining a groove of a welding piece, wherein a groove angle is 32.5-37.5 degrees; controlling a truncated edge within a range of 0-1.5 mm; cleaning the welding surface of a welding piece and a welding wire; coating soldering flux paste of the soldering flux CJ301 on the groove of the clean welding piece and an area within a 30-mm range near the groove, as well as the surface of the welding wire; assembling the welding piece with an assembly clearance of 1.5-3.0 mm; pre-heating the welding piece to 200-300 DEG C before welding; welding a welding bead at a bottom layer by using a high-frequency arc striking technology; cleaning the surface of the welding bead at the bottom layer after the welding bead at the bottom layer is welded; coating the CJ301 soldering flux paste on the surface of the welding bead at the bottom layer; welding a filling layer, cleaning the surface of the filling layer after the filling layer is welded, and coating the CJ301 soldering flux paste after cleaning the surface of the filling layer; welding a cover surface layer; welding a weld joint and then pickling, and washing the weld joint with water; and drying with hot air.
Owner:CHINA NAT CHEM ENG THIRD CONSTR

New energy power generation system and distributed mixing maximum power tracking method

A distributed new energy power generation system and a distrusted mixed maximum power tracking method. Output ends of a plurality of serially connected new energy power generation devices (1011, 1012, …, 101n) form a high-voltage direct-current bus bar. A DC-DC converter (102) and a backend integrated converter (103) separately perform MPPT on an output power of each new energy power generation device (1011, 1012, …, 101n) and an output power of a whole new energy power generation system. A difference current of the new energy power generation device (1011, 1012, …, 101n) is delivered to the DC-DC converter (102), and the output voltage is adjusted by using the DC-DC converter (102), so that this part of energy is merged into the direct-current bus bar and jointed delivered to the integrated converter (103), and by means of the collaboration of two MPPT functions, the whole new energy power generation system outputs a maximum power.
Owner:SHANGHAI CONVERTERGY ENERGY TECH

Portable operation shadowless lamp with camera shooting function

The invention discloses a portable operation shadowless lamp with a camera shooting function. The portable operation shadowless lamp is characterized in that the portable operation shadowless lamp is provided with a base capable of being dragged and moved, the base is provided with an accommodating box capable of being opened or closed and supporting rods detachably connected, and LED illumination devices and camera shooting devices are arranged at the ends of the supporting rods in a detachable mode; when the portable operation shadowless lamp is not used, the supporting rods, the LED illumination devices and the camera shooting devices are detached and placed into the accommodating box and can be conveniently dragged and moved; when the portable operation shadowless lamp is in use, the supporting rods, the LED illumination devices and the camera shooting devices are sequentially connected and assembled to form a floor shadowless lamp. The portable operation shadowless lamp has the advantages of being convenient to carry and flexible to use. Furthermore, because the portable operation shadowless lamp is provided with the illumination devices and the camera shooting devices, the portable operation shadowless lamp has the operation illumination function and can also conveniently achieve medical camera shooting. According to the portable operation shadowless lamp, the brightness and light spots of the illumination devices can be intelligently adjusted so as to meet different illumination requirements.
Owner:张波

Distal locking nail sighting device for interlocking intramedullary nail

The invention discloses a distal locking nail sighting device for an interlocking intramedullary nail, and relates to the technical field of orthopaedic trauma medical instruments. A guide slider is slidably arranged in the guide slider mounting frame of the distal guide rod, Between that mount frame of the guide slider and the guide slider, a first slide movement adjusting mechanism is arranged,a distal guide rod is provided with a first guide hole, the guide slider is provided with a second guide hole, the upper and lower sides of the second guide hole are respectively provided with a firstmetal indicating line, and the side frame of the guide slider mounting frame is provided with a metal graduation line. The calibration slider mounting frame of the calibration lever is slidably provided with a calibration slider, a second slider movement adjusting mechanism is arranged between the calibration slider mounting frame and the calibrated slider, the calibration lever is provided witha first calibration hole, the calibration slider is provided with a second calibration hole, and the upper and lower sides of the second calibration hole are respectively provided with a second metalindicating line. The distal locking nail sighting device solves the problem that the distal end of the intramedullary nail is difficult to lock, shortens the operation time and improves the operationefficiency.
Owner:熊海阔 +1

Large circulation garbage percolate treatment process with characteristic of adaptability

The present invention discloses a large circulation garbage percolate treatment process with a characteristic of adaptability. The process is characterized in that the following improvements are performed based on the conventional garbage percolate treatment process, wherein the improvements comprise that: an ultra-filtration effluent reflux system is added, and comprises four parts such as reflux of ultra-filtration effluent to an adjustment tank, reflux of ultra-filtration effluent to an anaerobic tank, reflux of ultra-filtration effluent to a denitrification tank and reflux of ultra-filtration effluent to a nitrification tank, two parts such as reflux of ultra-filtration concentration sludge to the anaerobic tank and reflux of ultra-filtration concentration sludge to the adjustment tank are added, a pipeline transcending system is added so as to perform direct transcendence entering of the percolate raw liquid into the denitrification tank, and a fuzzy control system is additionally arranged. The process has the following beneficial effects that: self-circulations of various process segments in the system in the large range are flexibly regulated so as to effectively reduce impact on the system due to substantial organic load fluctuation, ensure long time stable operation of the system, and achieve an adaptability function of the garbage percolate treatment process; and structure sizes of various reactors can be properly reduced, capital construction investment and operating cost can be saved, foams in the nitrification tank can be effectively eliminated, and other effects are provided.
Owner:PACIFIC WATER TREATMENT ENG

Control method for inhibiting continuous commutation failure of high-voltage DC power transmission based on harmonic detection

ActiveCN110165694AWill not affect the operationDoes not Compromise Low-Voltage Current-Limit Control (VDCOL) PerformanceCurrent/voltage measurementElectric power transfer ac networkLow voltageDecomposition
The invention discloses a control method for inhibiting a continuous commutation failure of high-voltage DC power transmission based on harmonic detection, and belongs to the technical field of thermo-optic and electro-optic. The method comprises the steps: deducing control parameters of each harmonic control loop by a time area analysis method, and adding the control parameters into low-voltage current-limiting control of an original control system; when the high-voltage direct-current system has a commutation failure, detecting the voltage of the commutation bus, performing Fourier decomposition, and performing the inhibition of each harmonic component through a newly added harmonic control system, thereby achieving the purpose of inhibiting the subsequent commutation failure. Accordingto the invention, no primary equipment is added, and only a control system is improved, so the system transformation workload is low, namely, the cost is low; when a harmonic voltage of the system isdetected, the control method provided by the invention improves the performance of low-voltage current-limiting control (VDCOL) by reducing the influence of the harmonic component, achieves the effectof inhibiting the continuous commutation failure, reduces the risk of DC locking, and improves the safety and stability of system operation.
Owner:NANJING NORMAL UNIVERSITY +2

Method for testing short circuit of medium-voltage busbar of EMU train

The invention relates to a method for testing the short circuit of a medium-voltage busbar of an EMU (electric multiple units) train. The method comprises the steps of (1) setting multiple auxiliary converters in the train, setting N coupling switches on the medium-voltage busbar, wherein the auxiliary converters are connected in parallel for output, the coupling switches are switched on in normalworking, and the medium-voltage busbar connects the whole train, (2) firstly confirming whether a short circuit fault is an auxiliary converter internal fault once the vehicle has the short circuit fault and reducing a fault range, (3) allowing a vehicle to start an external short-circuit test program if the auxiliary converter has no internal fault, switching off the N coupling switches, dividing the medium-voltage busbar into N+1 segments, and then inputting the auxiliary converters to judge a faulty busbar segment, and (4) switching off one or two adjacent coupling switches after confirming the faulty busbar segment, switching on coupling switches which are not adjacent to the faulty busbar segment to ensure the normal working of a medium-voltage load of a busbar segment which is not in short circuit. According to the method, a line fault point can be refined, the fault influence range is reduced, even the fault influence can be avoided, and the vehicle operation is maintained to the maximum extent.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD

Method for detecting whether distance between subway platform shielded gate and vehicle body is safe

InactiveCN104266598AImprove detection accuracyEasy to maintain and testUsing optical meansCar doorEngineering
The invention discloses a method for detecting whether the distance between a subway platform shielded gate and a vehicle body is safe. According to the method, a two-dimensional laser scanner is installed at the point where the midperpendicular of the rear surface of a railway vehicle intersects with the plane where the bottom edges of vehicle doors are located, an angle encoder is installed on the head of an axle, a polar coordinate storage module, a data processing host and a mileage positioning module are installed in a compartment, spatial three-dimensional coordinates are obtained through processing of the data processing host by means of the distance between the scanner and the shielded gate obtained by the two-dimensional laser scanner and the advancing mileage of the vehicle obtained by the angle encoder and the mileage positioning module, then specified vehicle limit coordinate values are introduced to the same three-dimensional coordinate system, and the actual distance between the vehicle body and the shielded gate is measured and then compared with the specific safety distance so that whether the distance between the shielded gate and the vehicle meets safety requirements can be judged. According to the method, vehicle-mounted dynamic detection is achieved, detection precision is improved, operation is easy, realizing cost is low, and application and popularization are facilitated.
Owner:SHANGHAI UNIV OF ENG SCI

Waste single battery crushing system and process

The invention provides a waste single battery crushing system and process. The crushing system comprises a battery crusher, a low-temperature baking furnace, a first hammer mill, a first linear sieve, a magnetic separation mechanism, a second hammer mill, a cyclone dust collector, a drum sieve, a second linear sieve and a gravity separation system, wherein a first negative pressure adsorption system is arranged above the battery crusher and the low-temperature baking furnace; a second negative pressure adsorption system is arranged above the first hammer mill, the first linear sieve, the magnetic separation mechanism, the second hammer mill, the drum sieve and the gravity separation system; the first negative pressure adsorption system is connected with a waste gas treatment system; and a dust collection treatment system is connected to the portion above the second negative pressure adsorption system and the cyclone dust collector. The waste single battery crushing system integrates crushing of waste single batteries, recovery and disposal of electrolyte, baking of crushed materials, grinding of the crushed materials, screening of magnetic shells, recovery of positive and negative electrode powder, recovery of diaphragm paper, recovery of copper and aluminum foils and dust collection treatment, and the purpose of recycling resources is achieved.
Owner:派尔森环保科技有限公司

High-power direct current pulse power supply

The invention discloses a high-power direct current pulse power supply. The high-power direct current pulse power supply comprises a rectification power supply, a positive pole confluence busbar, a negative pole confluence busbar, a pulse controller and multiple basic units; a positive pole of the rectification power supply is connected with the positive pole confluence busbar, a negative pole of the rectification power supply is connected with a negative pole confluence busbar, the multiple basic units are arranged between the positive pole confluence busbar and the negative pole confluence busbar in parallel, and the pulse controller is connected with each basic unit. The high-power direct current pulse power supply has the advantages that each electrolysis unit adopts a distributed structure, pulse direct current power supply is realized for each electrolysis unit by virtue of a pulse transformer provided with a pulse driving tube and by utilizing a magnetic balance principle and vector superposition effect of electric quantity, capacity is not limited, demand of pulse power supplies in any specification and at any voltage and current grades can be met, and a transformer is adopted as a pulse generating element, so that loss of the high-power direct current pulse power supply is far lower than on-state loss of power electronic devices such as an IGBT and an MOSFET.
Owner:XIANGTAN ELECTRIC MFG CORP LTD

Nuclear power peak regulation system and method based on seawater desalination technology

The present invention proposes a nuclear power peak regulation system and method based on seawater desalination technology. Multiple chlorine plants in Group B and Group B, and each desalination plant in each group works in parallel; the desalination plants in Group A are connected to the chlorine plants in Group A to form the first group of joint desalination plants; the desalination plants in Group B The plant is connected to the chlorine plant in group B to form the second group of combined desalination plants; the desalination plant and the chlorine plant are powered by nuclear power units, and each desalination plant is powered independently. The peak shaving method makes the nuclear power units run at full capacity during the peak load period, one of the two combined desalination plants is out of operation, and the two sets of combined desalination plants are put into operation at the same time during the off-peak period. Using hydropower cogeneration to meet the requirements of nuclear power units to participate in peak regulation, extend the operating time of nuclear power with base load, increase the minimum operating power of nuclear power units, and then improve the safety and economy of nuclear power operation.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
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