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60results about How to "Guaranteed stable operation" patented technology

Power balancing control method of cascaded photovoltaic grid-connected inverter

InactiveCN103795077AAchieving power balanceGuaranteed stable operation
The invention brings forward a power balancing control method of cascaded photovoltaic grid-connected inverter on the partial shadow condition. The method comprises the following steps: (1), carrying out independent maximum power point tracking (MPPT) controlling on H bridges of all cascade units to obtain all-stage direct-current voltage instruction values and then carrying out PI controlling on a general direct-current voltage to obtain a grid-connected current instruction value; (2), carrying out quasi-proportional resonant (PR) control of the grid-connected current and grid voltage feedforward control so as to obtain initial duty ratio values of the H bridges; (3) carrying out per-unit processing on actual values of the direct-current side voltages of the cascade units according to the respective direct-current side voltage instruction values of all the cascade units, carrying out comparison with 1 and carrying out PI controlling so as to obtain active correction values of the duty ratios of the H bridges, and realizing power balancing control based on the duty ratio correction. According to the control method, floating control of the grid-connected current can be realized; and power balancing of all power units of the cascade inverter can be maintained. The provided control method has advantages of clear conception, simple control structure, and easy engineering realization and the like.
Owner:SOUTHEAST UNIV

Detection robot for transmission pole climbing

ActiveCN108454721AGuaranteed stable operationReduce the risk factor
The invention discloses a detection robot for transmission pole climbing. The robot comprises an upper box body and a lower box body, wherein a guiding cylinder is arranged on the upper box body, a connecting cylinder is arranged on the lower box body, a threaded rod is arranged in the upper box body, a main motor is arranged in the upper box body, a main gear is arranged on an output end of the main motor, and a sub-gear is arranged on the threaded rod; a sub-motor is arranged in a shell body, the shell body is provided with an opening, an output end of the sub-motor is provided with a driving gear, a driven gear is arranged on a screw rod, a clamping claw is hinged at the end portion of each supporting rod, a compressing block is fixed at the end portion of a sleeve, and the side wall ofthe clamping claw is provided with a plurality of anti-slip strips. The detection robot for the transmission pole climbing has the advantages that the vertical movement of the upper box body and lower box body on the pole are used to replace manual climbing, components on the pole are detected and monitored through a detecting part arranged on the upper box body, detection data is fed back to a monitoring center on the ground, so that a construction worker can quickly exclude relevant obstacles to ensure the stable operation of a high-voltage transmission line.
Owner:SHENZHEN POWER SUPPLY BUREAU +1

Adjusting method and system for three-phase imbalance of load of transformer area

PendingCN111463804AGuaranteed stable operationEnsure reliable power supply
The invention discloses an adjusting method, system and device for three-phase imbalance of the load of a transformer area, a medium and equipment. The method comprises the following steps: S1, carrying out transformer area recognition and phase recognition on power consumers, and uploading recognition results; S2, acquiring the voltages and currents of all the ammeters in a transformer area to which a terminal belongs according to a preset acquisition frequency, and calculating an average current value according to a preset period; S3, calculating the three-phase unbalance rate of a low-voltage power grid of the power supply transformer area according to the collected voltages and currents of the ammeters and the phase information of the transformer area where the ammeters are located; S4, if the three-phase unbalance rate exceeds a preset limit value, making a regulation and control strategy according to corresponding relation among the phase information, an intelligent phase changeswitch and electric meters carried under the intelligent phase change switch; and S5, issuing a regulation and control instruction, and issuing a phase switching instruction to the intelligent phase-change switch. The method has the advantages of dynamic adjustment, good real-time performance, low cost, high applicability and the like.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

Movable contaminated bottom sediment on-site treatment integral device and treatment process thereof

InactiveCN107140802AGuaranteed stable operationsolve processing problems
The invention relates to a movable contaminated bottom sediment on-site treatment integral device and a treatment process thereof. The integral device comprises a movable assembly and an integral treatment assembly loaded on the movable assembly, wherein the integral treatment assembly comprises a slag-removing sand-removing integral unit, a pre-concentrating unit, a dosing conditioning unit and a deep concentrating and dewatering unit; a slag-removing outlet of the slag-removing and sand-removing integral unit is connected with a sundry collecting device; a sand-removing outlet is connected with a sand grain receiving device; a sewage outlet and a dosing hole of the dosing conditioning unit are connected with the inlet of the pre-concentrating unit together; a bottom sludge outlet of the pre-concentrating unit is connected with the inlet of the deep concentrating and dewatering unit; the bottom outlet of the deep concentrating and dewatering unit is connected with a mud cake receiving device. Compared with the prior art, the movable contaminated bottom sediment on-site treatment integral device and the treatment process thereof have the advantages that contaminated bottom sediment can be treated effectively, and resource utilization of sand grains in the bottom sediment is realized synchronously; meanwhile, the integral treatment assembly is loaded on ta container or a ship in a centralized way, so that the floor area is saved effectively, building cost is lowered, and operation is flexible.
Owner:中国电建集团装备研究院有限公司

Device and method for hydraulic support gesture detection

InactiveCN108981650AGuaranteed stable operation
The invention discloses a device and a method for hydraulic support gesture detection. The device comprises a data acquisition device, a signal transmission module, a signal processing module and a display module. The water column pressure is measured through a pressure sensor, the perpendicular height of a hose pipe is further determined, a vertical height difference of four corners of a rectangular top plate of a hydraulic support and a vertical height difference of four corners of a rectangular bottom plate are obtained, then a long side inclined gesture angle and a wide side inclined gesture angle of the rectangular bottom plate and a long side inclined gesture angle and a wide side inclined gesture angle of the rectangular top plate are obtained by utilizing a trigonometric function through the vertical height differences and known long side lengths and wide side lengths of the rectangular bottom plate and the rectangular top plate, and finally, by adopting the two angles as difference values, the long side inclined gesture angle and the wide side inclined gesture angle, relative to the rectangular bottom plate, of the rectangular top plate are obtained; finally the real-timegesture detection of the hydraulic support top plate and the bottom plate is realized. According to the device and the method provided by the invention, the real-time gesture angle of the hydraulic support can be accurately detected, so that the stable operation of the hydraulic support is ensured.
Owner:CHINA UNIV OF MINING & TECH

Ice disaster prevention method for suppressing wire torsion through distributed suspended heavy hammers

InactiveCN111029964APreventing Icing DisastersGuaranteed stable operation
The invention provides an ice disaster prevention method for suppressing wire torsion by distributed suspended heavy hammers. The method comprises the following steps: S1, acquiring parameters of a power transmission line, wherein the parameters comprise an equivalent icing thickness and a line span length of the power transmission line; S2, calculating eccentric torque of eccentric ice of wing-shaped icing formed by the power transmission line under the condition that the power transmission line is not twisted; S3, determining the total torque of the suspended heavy hammers according to the suspended weight mass and the shape of the suspended heavy hammers, wherein the total torque is equal to the eccentric torque; and S4, determining the number and the distribution spacing of the suspended heavy hammers, and then suspending the suspended heavy hammers according to the distribution spacing. The power transmission line can be effectively prevented from waving under the wind power condition so that the power transmission line is prevented from twisting due to waving to form uniform icing and the icing is non-uniformly coated on one side. The wing-shaped icing of the power transmission conductor naturally falls off under the action of natural wind power so that the icing disaster of the power transmission line is prevented, the stable operation of the whole power grid system is further ensured, and the production and life loss of the society caused by the icing of the power transmission line is avoided.
Owner:CHONGQING UNIV +4

System of utilizing liquid nitrogen wash to produce syngas for synthetic ammonia and LNG

ActiveCN106642988AGuaranteed stable operation
Disclosed is a system of utilizing liquid nitrogen wash to produce syngas for synthetic ammonia and LNG. The system comprises a first heat exchanger, a second heat exchanger, a dehydrogenation tower, a liquid nitrogen wash tower, a methane tower, a nitrogen refrigerating system and a medium voltage nitrogen inlet pipe, wherein the medium voltage nitrogen inlet pipe is connected to a medium voltage nitrogen gas source, the medium voltage nitrogen inlet pipe is connected to the liquid nitrogen wash tower after passing the first heat exchanger, the second heat exchanger and a third heat exchanger, the medium voltage nitrogen inlet pipe is communicated with a first pipeline through a first inlet pipe, a communication point between the first inlet pipe and the first pipeline is located between a nitrogen compressor unit and the first heat exchanger, and the first inlet pipe is provided with a first valve. According to the system of utilizing liquid nitrogen wash to produce syngas for synthetic ammonia and LNG, qualified syngas for synthetic ammonia is produced, and an LNG product with a high additional value is obtained at the same time; in addition, when a synthesis ammonia system stops, stable operation of the system can be guaranteed under the situation that a raw material of ammonia synthesis is not produced.
Owner:BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD

Method for preventing whole-house separate purifying device film from being polluted

InactiveCN103084070AAvoid heavy pollutionGuaranteed stable operation
The invention relates to the technical field of water purification, and in particular relates to a method for preventing a whole-house separate purifying device film from being polluted. The method comprises the following steps of: 1) carrying out ultrafiltration membrane backwashing on a hollow fiber ultrafiltration membrane of ultrafiltration equipment through tap water, and then carrying out positive ultrafiltration membrane washing; and 2) carrying out positive spiral-wound membrane washing on a spiral-wound membrane of nanofiltration or reverse osmosis equipment through water. According to the method for preventing the whole-house separate purifying device film from being polluted, the hollow fiber is subjected to ultrafiltration backwashing, positive ultrafiltration washing and positive spiral-wound membrane (nanofiltration or reverse osmosis) washing by the raw water of tap water when in downtime in light of the polluting conditions of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) of a core component of a whole-house separate water supplying device, the serious pollution of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) can be effectively avoided, the stability of the system in running can be ensured, the service life of the reverse osmosis membrane is prolonged, and the operation cost of the system is reduced.
Owner:ZHEJIANG CREATION ENVIRONMENT TECH

Deep bed underflow process for enhanced nitrogen removal advanced treatment of low-pollution sewage

PendingCN111517587AGuaranteed stable operation
The invention relates to a deep bed underflow process for enhanced nitrogen removal advanced treatment of low-pollution sewage. According to the process, sewage is enabled to flow through a surface flow constructed wetland and a deep bed horizontal subsurface flow wetland in sequence; the surface flow constructed wetland comprises a first-stage surface flow wetland and a second-stage surface flowwetland; a nitrifying bacteria inoculant is added into the first-stage surface flow wetland; an aeration drop weir is arranged at the tail end of the first-stage surface flow wetland; wherein the deep-bed horizontal subsurface flow wetland is sequentially paved with a breathable impermeable sand layer, a filter layer, a denitrifying bacterium agent composite carbon source layer and an ecological gravel filler layer from bottom to top; tail water of the surface flow constructed wetland enters the deep bed horizontal subsurface flow wetland through a water collecting weir and a water passing culvert pipe and then is discharged through a water distribution channel, a subsurface flow wetland main body and a water collecting channel of the deep bed horizontal subsurface flow wetland. Accordingto the invention, the problems of nitrification reaction aeration of the subsurface wetland, lack of a carbon source in denitrification and low hydraulic load and large occupied area of the subsurfacewetland are solved, the stable operation of artificial constructed wetland system is ensured, and the low-pollution sewage is subjected to deep enhanced denitrification treatment.
Owner:山东省环科院环境工程有限公司

Water filter type dust absorption apparatus for chemical engineering production of chemical fertilizers

InactiveCN107930317AGuaranteed stable operation
The invention relates to an absorption apparatus, and especially relates to a water filter type dust absorption apparatus for chemical engineering production of chemical fertilizers. A technical problem to be solved is to provide the water filter type dust absorption apparatus for chemical engineering production of chemical fertilizers, having the advantages of effectiveness in absorption of smallparticles, convenience in cleaning of the absorbed small particles, and ensuring of the production safety of workers. The water filter type dust absorption apparatus for chemical engineering production of chemical fertilizers, provided to solve the technical problem, comprises a first mounting plate, an L-shaped supporting rod, a preliminary filtering device and a first air discharging tube; anda water tank is arranged at the right side of the top of the first mounting plate, a water inlet tube is arranged at the right side of the top of the water tank, and a water outlet tube is arranged atthe lower part of the right side of the water tank. Outside large impurities are separated through a first mesh plate to avoid the outside large impurities from entering an air absorption device, sothe stable running of the absorption apparatus is guaranteed; and a second mesh plate is positioned in a second frame to adsorb parts of small particles under the action of static electricity, so thefiltering capability of the apparatus is improved.
Owner:邱苏英

Indoor waterproof leakage monitoring insulating top shell device

InactiveCN112909754AAvoid secondary failures with unstable operationGuaranteed stable operation
The invention relates to an indoor waterproof leakage monitoring insulating top shell device which is technically characterized by comprising a waterproof leakage monitoring insulating top shell and a water guide supporting device installed at the lower end of the waterproof leakage monitoring insulating top shell. The waterproof leakage monitoring insulating top shell is made of a waterproof leakage monitoring insulating plate with the high middle and the two low sides, and water collecting grooves are formed in the lower edges of the two sides of the waterproof leakage monitoring insulating plate; and a drainage hole is formed in the water collecting groove and is used for draining water in the water collecting groove through the water guide supporting device. The water collecting groove is formed in the lower edge of the waterproof leakage monitoring insulation top shell, water in the water collecting groove is discharged through the water guiding supporting device at the bottom, and the functions of water prevention, water leakage monitoring, water leakage guiding, electrical insulation and isolation and the like are achieved; and meanwhile, the moisture-sensitive ink layer with uniform net-shaped patterns is arranged on the waterproof leakage-monitoring insulating top shell, so that maintenance personnel can find the water dripping condition and deal with the water dripping problem in time, and normal operation of the high-voltage electrical equipment is ensured.
Owner:TIANJIN DONGJIA ELECTRIC POWER ENG TECH CO LTD

Transformer oil intelligent temperature adjusting system and transformer oil intelligent temperature adjusting method

PendingCN113690023AGuaranteed stable operation
An intelligent temperature regulation system for transformer oil provided by the invention can be used for carrying out intelligent temperature regulation control on the transformer oil, and comprises an oil-water cooler, a steam heater and a microcomputer controller; an oil inlet pipeline, an oil outlet pipeline, a water inlet pipeline A and a water outlet pipeline A are arranged on the oil-water cooler, and a bracket A is arranged at the bottom of the oil-water cooler; a steam inlet pipeline, a steam outlet pipeline, a water inlet pipeline B and a water outlet pipeline B are arranged on the steam heater, and a bracket B is arranged at the bottom of the steam heater; the water outlet pipeline B is communicated with the water inlet pipeline A through a connecting pipeline; a temperature sensor A is arranged on the oil inlet pipeline, and a temperature sensor B is arranged on the water outlet pipeline B; an electric valve A is arranged on each of the steam inlet pipeline and the steam outlet pipeline; a bypass pipe is communicated with the connecting pipeline, and an electric valve B is arranged on the bypass pipe; and the temperature sensor A, the temperature sensor B, the electric valve A and the electric valve B are electrically connected with the microcomputer controller. Correspondingly, the invention further provides an intelligent temperature adjusting method for the transformer oil.
Owner:ZHEJIANG ERG TECH

Forklift feeding structure for steel mill

InactiveCN109573495AGuaranteed stable operation
The invention discloses a forklift feeding structure for a steel mill. Multiple groups of forklift wheels are arranged on a rack; a guiding structure is arranged between the two groups of forklift wheels, and comprises a support beam; the support beam is perpendicular to a plate unloading table; the back end of the support beam and a rack of the plate unloading table are arranged in a sliding waythrough a track; multiple groups of guide wheels are arranged on the upper surface of the back end of the support beam; a guiding frame is arranged at the front end of the support beam; rolling wheelsare arranged on the bottom part of the support beam; the guiding frame is provided with an inclined surface; the height of the inclined surface is larger than the height of each forklift wheel; a casting blank is arranged in front of the guiding frame; and when the guiding frame moves backwards, the casting blank moves to the upper face of the support beam along the inclined surface, so that therolling wheels are effectively prevented from being scrapedoff. The forklift feeding structure for the steel mill provided by the invention has the advantages that the guiding frame is additionally arranged at the gap between the two groups of forklift wheels of the plate unloading table, and the guiding wheels are arranged above, so that the casting blank can slide favorably. When steel is pushed, an operator firstly utilizes the frame to align at the casting blank, then the casting blank is lifted up and lowered down so as to be higher than the guiding wheels, and the steel is then pushed, so that the guiding wheels are effectively prevented from being scraped, and the stable operation of production is ensured.
Owner:宋玉

Drainage tank and thinning machine

The invention relates to the technical field of thinning machines, in particular to a drainage box and a thinning machine. The drainage box comprises a leveling boss, a connecting piece, a pull rod and an adjusting piece, a plurality of leveling stations are arranged on a bottom plate of the drainage box in the circumferential direction of the assembly hole at intervals, the leveling stations are concaved inwards to form the leveling boss with an opening in the bottom, and the side wall of the leveling boss is connected with the bottom plate of the drainage box. The connecting piece is arranged at the opening end of the leveling boss and connected with the bottom plate. One end of the pull rod is fixedly connected with the top wall of the leveling boss, and the other end is movably connected with the connecting piece. The adjusting piece can enable the connecting piece to move in the axial direction of the pull rod and drive the bottom plate close to the leveling station to deform, and therefore the size of the gap between the assembly hole and the rotary table is adjusted. The thinning machine adopts the drainage box, and the bottom plate near the leveling station is leveled through the matching of the adjusting piece and the pull rod so as to level the assembly hole, so that the gap between the assembly hole and the rotary table is uniform and consistent, and the rotary table is prevented from interfering with the assembly hole in the rotating process.
Owner:JIANGSU JCA ELECTRONICS TECH CO LTD

Resource utilization method of copper in etching waste liquid

The invention is suitable for the technical field of resource recovery, and provides a resource utilization method of copper in etching waste liquid, the etching waste liquid enters a water inlet tank of a ceramic membrane system, the etching waste liquid is pumped into the ceramic membrane system through a feeding pump and a circulating pump, impurities such as large particles and suspended solids in the waste liquid are removed through ceramic membrane filtration, and the copper in the waste liquid is recycled. The obtained ceramic membrane system produced water enters the ceramic membrane system produced water tank, the etching waste liquid is pretreated by adopting a ceramic membrane technology, and due to the fact that the etching liquid is high in acidity and complex in component, compared with other technologies, a ceramic membrane has the excellent performance of acid resistance, alkali resistance, organic solvent resistance, high temperature resistance and the like, stable operation of the system can be guaranteed, and meanwhile, the production water can be recycled. The pore size of the ceramic membrane is nanoscale, the filtering precision is high, suspended matter impurities in waste liquid can be removed, the turbidity of water produced by the ceramic membrane system is smaller than 1 NTU, the water inlet requirement of a back-section nanofiltration system is met, and stable operation of the nanofiltration system can be guaranteed.
Owner:苏州金渠环保科技有限公司
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