125results about How to "Reduce the impact of normal operation" patented technology

The invention discloses a game theory-based multi-micro-grid interconnection running optimization method. The method includes the following steps: analyzing load demand response characteristics of allmicro-grids, and constructing a micro-grid group model; then initializing a system, establishing a day-ahead game model, and calculating a net load of the i-th micro-grid in a j-th period and a totalnet load amount of the system by day-ahead forecast data; obtaining respective optimal strategies by solving by all the micro-grids according to initial status, carrying out information exchange in amicro-grid group, sharing respectively obtained best strategy information, and updating status information; judging, by a system control center, whether Nash equilibrium is reached, and if the systemmeets an equilibrium condition, ending a game, and outputting a final optimization strategy set; and otherwise, turning ahead to carry out optimization again according to updated status information.The method can give consideration to both the stability and the economy of the system, and realize individual benefit maximization and optimal group running of the micro-grids at the same time.

The embodiment of the invention provides a service message verification method and device and a computer storage medium, and the method comprises the steps: analyzing a plurality of configuration files corresponding to a message format, and obtaining a plurality of pieces of configuration information corresponding to the message format wherein each piece of configuration information comprises a splitting rule and a checking rule corresponding to a message format; obtaining a service message; matching configuration information corresponding to the service message from the plurality of pieces ofconfiguration information according to the message format of the service message; splitting and verifying a specified field in the service message according to a splitting rule and a verification rule in the configuration information corresponding to the service message; and when it is determined that the verification result of the specified field is that verification is successful, generating abusiness object of the target business type according to the verified specified field. According to the embodiment of the specification, the service rule deployment updating efficiency of the servicesystem can be improved, and the influence of the service rule deployment updating of the service system on normal services is reduced.

The invention discloses a photovoltaic energy storage air-conditioning device and a control method thereof. The air-conditioning device comprises a photovoltaic power generation device, an energy storage device, an air-conditioning unit and an energy dispatching management device. The energy dispatching management device comprises a detection module which is used for detecting the air-conditioning operation state and the power supply quantity and the working state of the photovoltaic power generation device and the energy storage device; and a dispatching module which is used for controlling power supply and / or charging according to the air-conditioning operation state, the power supply quantity and the working state and the preset power supply priority and the power consumption priority. According to the photovoltaic energy storage air-conditioning device and the control method thereof, the air-conditioning device can operate under different working modes according to the change of the actual situation of power generation, power storage and power consumption so that real-time operation of multiple working modes can be realized, the influence of weather changes, the storage battery capacity and the operation state of the power grid on normal operation can be reduced and the stability and the reliability can be enhanced. Besides, photovoltaic power generation consumption is not wasted, the influence of charge and discharge on the service life of the storage battery is low and benefit maximization can be realized.

Embodiments of the invention provide a data processing method, and an error code dynamic compatibility method, apparatus and system. The error code dynamic compatibility method comprises the steps of receiving a request of a requester; when request processing fails, reading an error code mapping relationship from a specified position of a memory, wherein the error code mapping relationship is previously obtained from a dynamic loading server and loaded to the memory, and the error code mapping relationship is generated through configuration of the dynamic loading server; and returning corresponding error prompting information to the requester according to the error code mapping relationship. According to the data processing method and the error code dynamic compatibility method, apparatus and system, the problem that codes of an apparatus or a system need to be modified and re-released when the error code mapping relationship is changed each time can be avoided.

The invention discloses a method for selecting neighbor nodes for peer-to-peer network transmission. The method comprises the following steps: establishing a connection between a central node and target nodes, which download target files, in a cluster, and judging whether the target nodes have non-downloaded file fragmentations or not; if YES, inquiring network usage amounts and total network card bandwidths of the target nodes; calculating residual bandwidths of the target nodes according to the network usage amounts and the total network card bandwidths of the target nodes, and sequencing the target nodes according to an order of the residual bandwidths from large to small to obtain a sequence table; selecting the previous N target nodes in the sequence table as the neighbor nodes. The method can increase the data distribution speed on the premise of reducing the influence on normal operation of tasks of the cluster. The invention further discloses a system for selecting the neighbor nodes for peer-to-peer network transmission, a computer readable storage medium and a server which have the above beneficial effects.

The invention discloses a calibration method of an electrochemical gas sensor. The calibration method of the electrochemical gas sensor includes the following steps: S100, turning off a measurement box for the electrochemical gas sensor when receiving an instruction for calibrating the electrochemical gas sensor; S200, acquiring the gas concentration detection value in the measurement box; and S300, updating the gas concentration reference value of the electrochemical gas sensor according to the gas concentration detection value. The invention also discloses the electrochemical gas sensor and an air conditioner. The calibration method can improve the detection accuracy of the electrochemical gas sensor.

The invention discloses a jet-flow control structure for an overflow surface of a high dam. An overflow surface flip bucket is arranged at a chute section on a dam body; the lower section of the chute section is connected with a continuous type flip bucket; arc-shaped water retaining walls are arranged at the two sides of the overflow surface flip bucket for converging water flow; an arc-shaped aeration ridge is arranged on the side surface of the overflow surface flip bucket; an aeration slot communicates with the overflow surface of the dam body; the overflow surface flip bucket comprises a middle overflow surface flip bucket which is aligned to the middle of a sluice hole and edge overflow surface flip buckets which are correspondingly connected with upper side piers at the two sides of the chute section; discharged water flow is firstly crossed and collides to dissipate energy after being diffused from the two sides of the overflow surface flip bucket, so that water flow shot by the overflow surface flip bucket is converged by the arc-shaped water retaining walls and is crossed with and collides with water flow shot by the continuous type flip bucket to dissipate energy, and sufficient aeration of water flow is matched, and therefore, discharged water flow drops into a downstream river bed after a great deal of energy is dissipated, downstream water flow is good in shape, and the energy dissipating effect is obvious.

The invention discloses an SCR post treatment pipeline device for a large displacement engine, which includes an ejection pipeline. The ejection pipeline is provided with at least one nozzle that can spray carbamide liquor in the ejection pipeline. The nozzle is mounted on the ejection pipeline in a mode that the spraying direction is along the flow direction of the smoke body in the ejection pipeline and the spraying axis of the nozzle forms an included angle together with the axis of the ejection pipeline positioned along the spraying direction of the nozzle. Mixers are respectively arranged along the spraying direction of the nozzle in the ejection pipeline. The device can lead the carbamide liquor to be fast hydrolyzed to release ammonia and uniformly mixed with waste gas. The hydrolyzing rate of the carbamide is higher, thus leading an NOx compound to have longer reaction time and to be fully reacted and leading the SCR system to have higher waste gas conversion rate.

The invention discloses a node vulnerability scanning method and device and computer equipment. The method comprises the steps: obtaining the vulnerability information of an industrial control system, the vulnerability scanning information of a target industrial control system, and the network topology information of the target industrial control system; according to the vulnerability information of the industrial control system, the vulnerability scanning information of the target industrial control system and the network topology information of the target industrial control system, generating a target attack graph, wherein the target attack graph is used for representing attack path information between nodes in the target industrial control system; according to the target attack graph, calculating a vulnerability risk level of each node in the target industrial control system; and determining a vulnerability scanning strategy of the target system according to the vulnerability risk level of each node. Through the implementation of the invention, a higher security protection level can be provided for nodes with high risk levels, and the overall security of the system is improved; scanning of low-risk-level nodes is reduced, system resources are saved, and influences on normal operation of the system are reduced.

The invention discloses a permanent magnet brushless DC motor provided with a self anti-interference speed control circuit. The structure of the invention comprises a stator, a rotor and the speed control circuit, wherein, the speed control circuit consists of a tachogenerator, an A / D converting circuit, a digital pulse-width modulation circuit, a logic time delay circuit, a power amplifier drive circuit, an inverter circuit and a digital control circuit; the input end of the digital control circuit is orderly connected with the A / D converting circuit and the tachogenerator in series, and then to the rotor end of the permanent magnet brushless DC motor; the output end of the digital control circuit is orderly connected with digital pulse-width modulation circuit, the logic time delay circuit, the power amplifier drive circuit and the inverter circuit in series, and then to the stator end of the permanent magnet brushless DC motor. The invention has the advantages that: the invention can estimate external disturbance and compensate through feedback, reduce the effect of the external disturbance to the permanent magnet brushless DC motor, improve the dynamic performance of the motor, and reinforce the stability and reliability.

The invention relates to a wind power plant / photovoltaic power station model verification method based on a quick response generator. The method comprises the following steps: acquiring a measured voltage value, a measured frequency value, a measured active power value and a measured reactive power value at a wind power plant / photovoltaic power station grid-connection point; realizing accurate equivalence of an external power grid by taking the measured voltage value and the measured frequency value as control reference values of an excitation and speed regulation system of the quick response generator; and acquiring an active power value and a reactive power value at the grid-connection point through digital simulation computing, comparing the acquired active power value and reactive power value with the measured active power value and reactive power value, proving that a wind power plant / photovoltaic power station model is accurate if the acquired active power value and reactive power value are consistent with the measured active power value and reactive power value, otherwise indicating an error. Along with further contraction of a measured equivalent point, the method can be used for positioning the specific position of an error source of the wind power plant / photovoltaic power station model.

The invention discloses a server heat dissipation parameter regulation and control method. The method comprises the following steps of obtaining PID heat dissipation parameters of a target server, temperature values of target server components and a fan rotating speed through an IPMI protocol; judging whether a target server component of which the temperature value exceeds a corresponding temperature threshold exists or not; if yes, modifying the PID heat dissipation parameters to obtain the modified PID heat dissipation parameters; and calculating a target fan rotating speed according to themodified PID heat dissipation parameters, and adjusting the fan rotating speed to the target fan rotating speed. By applying the technical scheme provided by the embodiment of the invention, the operation is simple and easy, the debugging complexity is greatly reduced, and the influence on the normal operation of the server is reduced. The invention further discloses a server heat dissipation parameter regulation and control device and equipment and a storage medium, and the corresponding technical effects are achieved.

The invention provides an air guide plate driving device comprising a moving component, a first driving component, a second driving component, a positioning device and a first control module. The moving component with the tail end connected with an air guide plate is used for closing the air guide plate and moving the same to a preset position on the outer side of an air outlet of an air-conditioner indoor unit, and the preset position is the position capable of enabling the air guide plate to complete rotation of an air guide angle on the outer side of the air outlet. The first driving component is connected with the moving component and used for driving the same to move. The second driving component is connected with the air guide plate and used for driving the same to rotate. The positioning device is arranged correspondingly to the moving part, and forms a sensing signal when the moving component drives the air guide plate to move to the preset position. The first control module is connected with both the positioning device and the first driving component in a communication manner. According to the arrangement, the air guide plate driving device is capable of effectively guaranteeing accuracy in movement of the air guide plate. The invention further provides an air conditioner with the air guide plate driving device.

The embodiment of the invention provides a method and a device for processing registration and keeping alive. Network terminals or network exchange devices of a monitoring management system serve as registration authentication devices with a unified management platform, a network exchange device with initial registration success uses the management platform as a keeping-alive target device for keeping alive, the network terminal with the initial registration success is bound to a predetermined network exchange device in a registration message sending link, and keeping alive is carried out with the predetermined network exchange device bound with the network terminal as a keeping-alive target device. Occupancy of working resources in the management platform by registration and keeping alive can be effectively reduced.

The invention discloses a bus route recommending method considering bus arrival frequency and bus riding comfort, which comprises the following steps of: firstly, establishing a bus complex network for all bus stops and bus routes in a research area, and calculating the intermediary centrality of each bus stop; meanwhile, constructing an evaluation system of the bus route recommending method considering the bus arrival frequency and the bus riding comfort; secondly, setting geographical positions of a departure place S and destination E, and carrying out walking buffer area analysis on the S and the E respectively to obtain stop sets {Sa} and {Ea} of the S and E in a specified buffer area; and calculating all recommended bus route schemes from each bus stop in the {Sa} to {Ea}, wherein theobtained results are recorded as a set {SE}; finally, solving bus routes considering the bus arrival frequency and the bus riding comfort, wherein the results are sorted according to a specified itemsequence. According to the invention, the problems of walking distance, transfer, bus passenger comfort degree, arrival frequency and the like can be considered more reasonably, and a scientific basis is provided for urban bus trip optimization.

The invention discloses a peer-to-peer network transmission neighbor node selection method. The method includes the following steps that: connections are established between a central node and targetnodes in a cluster which download a target file; downloaded fragments of the central node are calculated, so that a first bit array is obtained, fragments stored in the target nodes are calculated, sothat second bit arrays are obtained; exclusive OR operation is performed on the first bit array and all the second bit arrays, so that the mutually-different data amount of the central node and eachtarget node can be obtained; and the target nodes are sequenced according to the large-to-small order of the mutually-different data amount, so that a sorted list can be obtained, and top N target nodes in the sorted list are selected as neighbor nodes. With the method adopted, data transmission rate can be improved under the premise that impact on the normal operation of a cluster task is decreased. The present invention also discloses a peer-to-peer network transmission neighbor node selection system, a computer readable storage medium and a server. The peer-to-peer network transmission neighbor node selection system has the advantages as the peer-to-peer network transmission neighbor node selection method.

The invention provides a ventilation and heat dissipation device for a new energy automobile battery pack, and relates to the technical field of new energy automobiles. The ventilation and heat dissipation device comprises a box body for accommodating a battery pack and a box cover matched with the box body, wherein the box body and the box cover form a battery pack accommodating cavity; the box body comprises a bottom plate and a side plate, the bottom end of the box body is fixed to the upper surface of the bottom plate, a high-temperature air inlet with a downward opening is formed in the bottom plate, and a low-temperature air inlet is formed in the side plate; an air guide assembly is mounted on the low-temperature air inlet; and an air outlet with an upward opening is formed in the box cover. The high-temperature air inlet and the low-temperature air inlet are formed at the same time, normal-temperature air flow and cooled low-temperature air flow are fed into the battery pack containing cavity, multi-point air supply can effectively improve the air supply efficiency, the heat dissipation effect is remarkably improved, meanwhile, the high-temperature air inlet and the low-temperature air inlet are each provided with an air guide assembly. The air inlet amount can be adjusted according to different vehicle using environments, and the adaptability is good.

The invention provides a control method for oil return and noise reduction of a multi-split air conditioner, a storage medium and the multi-split air conditioner. The control method for oil return and noise reduction of the multi-split air conditioner comprises the steps that S1, when operation parameters of the multi-split air conditioner meet preset conditions, an oil return operation is carried out; S2, according to the degree of supercooling before and after oil return, whether noise reduction control is met or not is judged; and S3, an electromagnetic valve SV<1> of a noise reduction device is opened, so that a refrigerant circulates on one side of an outdoor unit. According to the control method for oil return and noise reduction of the multi-split air conditioner, the problems that after oil return, when a system lacks the refrigerant, the refrigeration operation airflow sound is large, and control fails can be effectively solved; pre-acting is carried out on the oil return process, so that the time by circulation of the refrigerant again is shortened; and meanwhile, judgement is carried out on the opportunity of quitting noise reduction control, quitting is carried out in different modes, and therefore the influence on normal operation of the multi-split air conditioner is reduced, and the user experience is good.

The invention discloses a novel oxygen producing and supplying square cabin which comprises a square cabin body and an oxygen producing and supplying system arranged in the square cabin body, whereinthe oxygen producing and supplying system comprises a power distribution cabinet, an air compressor, an air pretreating system, a nitrogen-oxygen separation module, a cyclic-process compressor and anoxygen-argon separation module; the air compressor, the air pretreating system, the nitrogen-oxygen separation module, the cyclic-process compressor and the oxygen-argon separation module are sequentially connected through pipelines; the cyclic-process compressor is further connected with an oil-free oxygen compressor through a pipeline, and the oil-free oxygen compressor is connected with an oxygen bottle through a pipeline; a plurality of groups of axial-flow fans which are opposite to each other two by two are arranged on a lateral wall of the square cabinet body, an air inlet grid is arranged on a lateral wall of an inlet right facing the air compressor of the square cabinet body, and the power distribution cabinet is connected with a power supply and can distribute power for the oxygen producing and supplying system. As the oxygen producing and supplying system in the oxygen producing and supplying square cabin disclosed by the invention is in a modularization design, on one hand,the oxygen producing and supplying square cabin has the advantages of simpleness in being assembled and disassembled, convenience in installation and convenience in maintenance; on the other hand, convenience is brought to a user to do simple and convenient development; furthermore, the modularization design reduces gas buffer volume, the volume of the oxygen producing and supplying system is reduced, and the novel oxygen producing and supplying square cabin is convenient to transport and transfer.

The invention discloses an elastic displacement compensating fixed-connection unit and a deep sea multi-pressure-body combined type pressure structure. The elastic displacement compensating fixed-connection unit comprises a circular disc-shaped pre-tightening cover, a locating cylinder section, an elastic element, a displacement compensation element and a sliding coating; the displacement compensation element is mounted at the internal bottom of the locating cylinder section; the sliding coating is plated on the external bottom surface of the displacement compensation element; the elastic element is mounted above the displacement compensation element; and the circular disc-shaped pre-tightening cover is screwed into the upper portion of the locating cylinder section and compresses the elastic element so as to push the displacement compensation element by using the elastic element. According to the elastic displacement compensating fixed-connection unit and the deep sea multi-pressure-body combined type pressure structure, the shrinkage deformation of the deep sea multi-pressure-body combined type pressure structure can be effectively compensated, the influence of deformation incompatibility of multiple pressure structures on a connecting frame can be reduced, the connecting safety and reliability of the combined structure can be effectively enhanced, and the mounting and maintenance are convenient.

The invention belongs to the technical field of closed water connection, and particularly relates to an FRD double-sealed immediate detection closed water socket-and-spigot joint. The problems that inthe prior art, a spigot and a socket possibly make contact with each other and are sealed, the positions which make contact with each other and are sealed are prone to causing connectivity of the interior of a annular space to be interrupted, accordingly, sealing performance detection of a double-sealed socket-and-spigot joint is uncompleted are solved. According to the technical scheme, the FRDdouble-sealed immediate detection closed water socket-and-spigot joint comprises a spigot and a socket, the spigot is a joint part of an inserting-in end, and the socket is a joint part of a socket end; the outer wall of the spigot is provided with an annular pressure test groove, the two sides of the pressure test groove are provided with annular sealing ring installation grooves correspondingly,and sealing rings are installed in the sealing ring installation grooves; and the socket is provided with pressure test holes which correspond to the pressure test grooves. In addition, baffles are arranged in the pressure test grooves. The FRD double-sealed immediate detection closed water socket-and-spigot joint is suitable for connection of drainage pipelines.

The invention belongs to the technical field of drainage pipes, and specifically relates to a polyolefin drainage pipe with FRD double seal for instant detection of a closed water bell and socket joint. The polyolefin drainage pipe aims at the problem that in the prior art, a socket and a bellmouth may be contacted and sealed, and the contacted and sealed parts may lead to the interruption of theinternal connectivity of an annulus, and then the incomplete detection of the sealing inspection of the double-sealed bell and socket joint may exist. According to the technical scheme, the polyolefindrainage pipe comprises a pipeline, two ends of the pipeline are separately provided with the socket and the bellmouth through an integral forming mode, an annular pressure test groove is arranged onthe outer wall of the socket, and annular sealing ring installation grooves are arranged on both sides of the pressure test groove; and a pressure test hole is formed in the bellmouth, the distance between the pressure test hole and a bellmouth opening is equal to the distance between the middle of the pressure test groove and a socket opening, and in addition, a baffle can be arranged in the pressure test groove. The polyolefin drainage pipe with the FRD double seal for instant detection of the closed water bell and socket joint is applicable to the connection of the drainage pipeline.

The embodiment of the invention discloses a data processing method and device, equipment and a storage medium, and the method comprises the steps: receiving a data writing request which comprises a target data packet; Processing the target data packet according to a preset processing rule to obtain a processed data packet, the preset processing rule comprising a data format processing rule or a data filtering processing rule; Writing the processed data packet into the solid state disk; And when the data volume in the solid state disk reaches a preset data volume, writing a data packet in the solid state disk into the mechanical disk. By storing the data into the solid state disk, rotation of a magnetic head and rotation of a disk of the mechanical disk are reduced, and the service life ofthe mechanical disk is prolonged.

The invention provides a system utilizing low-temperature smoke residual heat of a generator unit to generate power. The system comprises a first steam power generation system, a condensing water pipeline, a low pressure heater and a steam condenser, wherein the low pressure heater and the steam condenser are arranged on the condensing water pipeline, the first steam power generation system comprises a low pressure cylinder, a smoke residual heat recycling device and a second steam power generation system, the low pressure heater is connected with the low pressure cylinder, the smoke residual heat recycling device comprises a heat absorbing section and a heat releasing section, the heat absorbing section is arranged in a boiler flue, the heat releasing section is arranged on a condensing water branch pipe which is parallelly connected with the condensing water pipeline, the second steam power generation system comprises a second steam turbine and a second generator which are connected, the second steam turbine is connected with the low pressure cylinder through a steam suction pipe, and the low pressure cylinder and the second steam turbine are connected with the condenser through steam exhaust pipes. The system has the advantages that the low-temperature smoke residual heat can be safely recovered, the recovered residual heat is used for generating power again by the cascade utilization method, the traditional problem of inaccurate metering of the power generation by recovered residual heat is solved, the problem of low-efficiency utilization of low-temperature residual heat of large power plants is also solved, and the power plant can reach the energy-saving and environment-protection purposes.

The data migration method comprises the steps of establishing connection with a to-be-migrated database, and determining operation activity of the to-be-migrated database at each time; determining target time according to the operation activity; at the target time, forbidding first operation on the to-be-migrated database; establishing a connection with a target database, and migrating the data inthe to-be-migrated database to the target database, the target database being forbidden to perform a second operation; when an instruction for carrying out a first operation on the migration databaseis received, carrying out the first operation on the target database; if the target database is not abnormal after the first operation, determining a performance index of the target database; and ifthe performance index of the target database is greater than a preset performance index threshold, determining that data migration is completed. The invention further provides a data migration device,a server and a storage medium. According to the invention, the stability of data migration can be improved to ensure the availability of the system.

The invention provides an air conditioner and a control method and device thereof and relates to the field of condensation-preventing control over air conditioners. The control method and device of the air conditioner can select an accurate moment to execute condensation-resisting operation so as to improve user experience. The control method comprises the steps that firstly, when the air conditioner performs refrigeration operation, first operation parameters of the air conditioner are obtained, wherein the first operation parameters comprise the first relative humidity in a room corresponding to the air conditioner and a rotation speed of an indoor fan of the air conditioner; the accumulative operation duration or continuous operation duration of a compressor of the air conditioner underthe condition that it is determined that the first operation parameters meet condensation conditions is obtained, wherein the condensation conditions comprise that the first relative humidity is larger than a preset relative humidity, and the rotation speed of the indoor fan is smaller than a preset rotation speed; and if it is determined that the accumulative operation duration is longer than afirst preset duration or the continuous operation duration is longer than a second preset duration, the condensation preventing operation is executed, wherein the first preset duration is longer thanthe second preset duration. The control method and device are applied to the air conditioner.

The invention discloses a cable positioning method based on weak magnetic detection technology. The method comprises the following steps: moving a fluxgate sensor horizontally above an area to be tested along a broken line; determining a starting point of a detector; determining a specific position and distribution of a cable; performing a processing process of magnetic field data; decomposing a total magnetic field component into three sub-magnetic fields; obtaining time-varying change waveforms of three magnetic field components; judging the position of the cable according to the wave troughs and peaks of the waveforms; and selecting the sampling frequency. The method has the advantages of high anti-jamming capability, capability of performing high-identification positioning, high sensitivity and simple operation. The method can be applied to AC cables and DC cables.

The embodiment of the invention discloses a routing implementation method and device for a peer-to-peer network, equipment and a medium. The method comprises the steps of determining at least one setidentity routing table through a node upper layer, wherein at least one node in the set identity routing table meets a set identity condition; deploying the set identity routing table in a routing layer of the node, the routing layer being further deployed in a basic routing table; and when a message sending demand is generated, sending the message in the peer-to-peer network based on the set identity routing table and the basic routing table. According to the routing implementation method for the peer-to-peer network, the influence of the network attack on the normal operation of the networkis reduced, the disgusting difficulty of the network attack is enhanced, and the stability of the system is further improved.

The invention provides a three-phase squirrel cage asynchronous motor with an auto-disturbance-rejection speed regulation circuit. The three-phase squirrel cage asynchronous motor is characterized in that the motor consists of four parts: a three-phase squirrel cage asynchronous motor, a state acquisition circuit, a digital control circuit with an auto-disturbance-rejection speed regulation function and a control quantity transmission circuit; the three-phase squirrel cage asynchronous motor has the advantages of obviously improving the capability that the three-phase squirrel cage asynchronous motor resists the external disturbance, leading the rotation speed to be recovered to the rated rotation speed after suffering severe disturbance, being capable of controlling the three-phase squirrel cage asynchronous motor in real time, reducing the control delay caused by low processing speed of a normal singlechip as a digital signal processor is employed, having higher reliability for the calculation and control, improving the dynamic performance of the motor, and reinforcing the stability and the reliability when the three-phase squirrel cage asynchronous motor runs.

The invention discloses a three-in-one vertical desander and a desanding process. The desander comprises a quick opening closure and a vertical barrel, wherein a medium inlet is formed in the upper part of the vertical barrel, a medium outlet is formed in the middle, a backflush port is formed in the lower part, and a sand discharge port is formed in the bottom; a screen pipe is arranged in the vertical barrel, the upper part of the screen pipe is connected with the upper part of the vertical barrel, and the lower part of the screen pipe is connected with the medium outlet; the medium inlet adopts tangent gas inflow, a cyclone guide device is arranged at the medium inlet, a sand storing space is formed below the medium outlet, and a conical funnel is arranged below the sand storing space;an inlet differential pressure gauge is arranged at the medium inlet, and an outlet differential pressure gauge is arranged at the medium outlet. Compared with the prior art, the three-in-one verticaldesander has the positive effects as follows: desanding precision is improved, influence on normal operation of downstream equipment is reduced, time for desanding operation is determined by monitoring desanding time through differential pressure, desanding operation is convenient, and operation difficulty is reduced.