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400results about How to "Short action time" patented technology

Three-phase load imbalance automatic adjusting method of power distribution network

The invention provides a three-phase load imbalance automatic adjusting method of a power distribution network. A phase change switch module and a central control region module are arranged. The central control region module comprises a control module and a carrier wave module. The phase change switch module comprises an electric power electronic switch unit and a phase selection switch controller unit. The three-phase load imbalance automatic adjusting process comprises steps of acquiring three-phase current data into the central control region module; calculating imbalance degree; adopting the genetic algorithm during over-limit; coding a vector gene for a three-phase switch switching state corresponding to each load branch; obtaining an optimal phase change control instruction according to corresponding target function of the phase change module; transmitting the optimal phase change instruction to a phase selection switch controller unit of a phase change switch module on each load branch through the carrier wave module; and controlling the electric power electronic switch unit to finish the phase change operation. According to the invention, the method is used for supporting automatic detection during operation of an electric power system, so large quantity of manpower and materials are saved, device safety is improved and power supply reliability is improved.
Owner:WUHAN UNIV

Three-phase imbalance regulation method capable of reducing network loss

The invention discloses a three-phase imbalance regulation method capable of reducing a network loss. The three-phase imbalance regulation method is characterized in that integrated minimum loss and optimal commutation operation are provided for three-phase imbalance regulation through considering the influence of three-phase imbalance on the network loss, the influence of a single-phase load on the network loss and the influence of a line loss on imbalance degree. The invention further provides an implementation method. Commutation switch modules and a central control area module are arranged; the commutation switch modules are arranged on various load branches in a power distribution network; all commutation switch modules are intensively connected to the central control area module; and three phases of current input ends of the commutation switch modules are connected with three phases of lines and three phases of current output ends of the commutation switch modules are connected with a user. The three-phase imbalance regulation method is used for supporting automatic detection while a power system runs, so that a lot of manpower and material resources are saved and the security of equipment and the power supply reliability are improved.
Owner:WUHAN UNIV

Over-voltage over-current protector of electronic and electric equipment

The invention discloses an over-voltage over-current protector of electronic and electric equipment. The over-voltage over-current protector of the electronic and electric equipment comprises a power surge protective device SPD I, a surge voltage divider and a power frequency current protector, two ends of the power surge protective device SPDI are respectively connected with a live wire and a null line after a power supply distribution board access port and before a protected equipment port, the surge voltage divider is composed of an electric reactor A, a power surge protective device SPD II and an electric reactor B in a series mode, the electric reactor A at one end of the surge voltage divider is arranged on a live wire after the power surge protective device SPD I, the electric reactor B at the other end is arranged on a null line after the power surge protective device SPD I, and the power frequency current protector is composed of a PTC positive temperature coefficient thermistor, an NTC negative temperature coefficient thermistor and a TVS tube. The over-voltage over-current protector of the electronic and electric equipment has surge over-voltage limit and surge residual voltage division protection functions and power frequency over-voltage and over-current protection functions, enables the equipment fault rate to be reduced and enables the equipment aging speed to be lowered.
Owner:CHANGSHA FAYBO COMM TECH

Fault protection system for distribution system

The present invention discloses a fault protection system for a distribution system. The system comprises a grounding-transformer protection device, a neutral point protection device, a transformer protection device for a station, a line protection device, a capacitor protection device, a low backup protection device, a high backup protection and a segment protection device which are connected with the A net and the B net of a station control layer of the distribution system and a synchronization time setting network, and each protection device interacts each operation state and the open and close state of the breaker connected with each protection device. Through network information interaction, the fault protection system for a distribution system allows the grounding-transformer protection device to timely know the position of the single-phase grounding fault, after the single-phase grounding fault happens, the grounding-transformer protection device does not need to wait for the motion time of other protection devices any longer and directly perform motion according to the itself delay, so that the protection motion time is reduced, the sensitivity is high, the rapid cutting of the single-phase grounding fault is realized as far as possible.
Owner:JIEYANG POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD +2

Card gluing mechanism

The invention discloses a card gluing mechanism. The gluing mechanism comprises a base, a fixing base, a pushing air cylinder, a sliding base, a jacking and placing mechanism, a supporting frame, a first proximity switch, a second proximity switch, guide rods, a pressing frame, first springs, a glue uniformizing plate with a plurality of glue uniformizing holes and a gluing mechanism; and a raw material plate to be glued is placed in the jacking and placing mechanism, the pushing air cylinder pushes the sliding base to move rightwards in place, the jacking and placing mechanism drives the rawmaterial plate to move upwards to be in contact with the glue uniformizing plate, the first springs are compressed, the gluing mechanism penetrates through the pressing frame to be in contact with theglue uniformizing plate, then a glue solution coats the raw material plate due to the action of the surface tension, so that glue solution coating is completed. According to the card gluing mechanism, the structure is simple, gluing can be automatically carried out on the raw material plate, the jacking and placing mechanism can be used for carrying out positioning and fixing and exerting certainpressure on the raw material plate, so that gluing is uniform, the gluing process and the raw material plate ejection process are combined together, so that the action time is shortened, and the production efficiency is improved; and meanwhile, devices such as air cylinders do not need to be arranged, so that the production cost is effectively reduced.
Owner:BEAUTIFUL CARD TECH SUZHOU CO LTD

Residual voltage recording module and residual voltage detection method of recloser type feed line terminal

A residual voltage recording module and a residual voltage detection method of recloser type feed line terminal relate to the field of power detection equipment, and especially to a recloser that feedline terminal for detecting the residual voltage and locking in power failure and a related method. The residual voltage recording module structurally comprises a rectification module, a current-limiting resistor, an energy storage capacitor, a freewheeling diode, a clamping diode, a bistable relay, and a voltage monopulse maintenance module. When there is residual voltage in a power distributionline, a residual voltage event recording module records a residual voltage event and maintains the residual voltage. After that the feed line terminal runs normally, state information in the residualvoltage event recording module is detected to determine a residual voltage fault, a corresponding motion is executed, and a fault area is isolated. The residual voltage event recording module employsall reactive devices, the motion time is short, the residual voltage event can be recorded, the feed line terminal can accurately determine a fault position according to information of the residual voltage event recording module, the fault line is isolated, and power supply of the normal line is ensured.
Owner:SHIJIAZHUANG KE ELECTRIC

Gray system theory-based method for actively controlling fuel charge of internal combustion engine

InactiveCN101761407AIn line with the actual fuel injection conditionsShort action timeElectrical controlMachines/enginesExternal combustion engineEngineering
The invention provides a grey system theory-based method for actively controlling the fuel charge of an internal combustion engine, belonging to the technical field of fuel injection system control of the internal combustion engine. The method comprises the following steps: 1.1 regularly and continuously sampling cooling water temperature T(0)(k) of the internal combustion engine under a running work state, air inlet temperature t(0)(k) of the internal combustion engine, the rotating speed n(0)(k) of the throttle internal combustion engine and the air-fuel ratio lambda(0)(k) of the internal combustion engine; and 1.2 taking the initialized basic injection time mu'(0)(k) as a reference sequence of grey association analysis, carrying out grey association analysis on the initialized parameters, and eliminating factors which are not in accordance with the association degree according to the grey association degree to acquire a factor sequence qi(0)(k) of each internal combustion engine affecting the injection time, and preparing for reducing the processing strength of the micro-processing unit and grey model construction; carrying out active forecast on the best injection time by applying the grey system theory so as to shorten the action time for fuel injection control of the micro-processing unit, improve the dynamic following performance, and simultaneously reduce the working strength of the micro-processing unit.
Owner:SHANDONG SHENPU TRAFFIC TECHNOLOGY CO LTD

Soft bag material alignment and packing work station machine

The invention discloses a soft bag material alignment and packing work station machine. The soft bag material alignment and packing work station machine comprises a frame body, a packing work station conveyor, an empty carton conveyor, a full carton conveyor, a separation feeder, a material collection box and an alignment box; the packing work station conveyor is arranged on the lower portion of the frame body; the bilateral sides of the packing work station conveyor, along the conveying direction, are connected with the empty carton conveyor and the full carton conveyor respectively; the separation feeder is arranged on the upper portion of the material collection box; the material collection box and the alignment box which are of bottomless structures are connected with each other, fixed on the frame body from top to bottom in turn and are corresponding to the packing work station conveyor which is arranged on the lower portion of the frame body; the lower end of the material collection box is provided with a drawing plate discharging device; the lower end of the alignment box is provided with a turning plate discharging device. According to the soft bag material alignment and packing work station machine, the structure is simple, the occupied area is small, the arrangement is convenient, the mechanical performance is stable, the automatic control is achieved, the production operation can be continuous, the operation time is greatly saved, the production efficiency is significantly improved, the unmanned production is achieved, and the labor productivity can be greatly saved.
Owner:DALIAN JIALIN EQUIP MFG

Superconduction switch for superconduction coil

The invention discloses a superconduction switch for a superconduction coil. The superconduction switch is characterized in that a resistance wire (4) which is connected with a heating power supply (5) is wound on a heat-conduction cylinder (2); a superconduction section (1) penetrates through the cylinder (2), and two ends, stretching out of the cylinder (2), of the superconduction section (1) are respectively connected with two leading-out ends of the superconduction coil (6); two leading-out ends of the superconduction coil (6) are also connected with a power supply (7) respectively through a power supply wire (7a). The superconduction switch is used for powering the superconduction coil, and after the superconduction coil is powered for one time, a magnetometer can obtain a high and stable noiseless magnetic field for a relatively long time; after the superconduction coil is powered by the superconduction switch for one time, the stable excitation current of an excitation system can be maintained for a long time, so that a car-mounted power supply which needs to continuously power the excitation system in the linear superconduction driving can be canceled, the weight of a suspension vehicle body can be reduced, and the system running efficiency can be improved.
Owner:SOUTHWEST JIAOTONG UNIV
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