194results about How to "Non-stop operation" patented technology

The invention relates to an emergency protection circuit device capable of completing automatic switching when an AC-DC power grid is in an abnormal state, and in particular relates to an intelligent warning and control method dedicated for ensuring safety and stability of the power grid. The method comprises the steps that: an intelligent control master station acquires real-time data of the power grid through an EMS (energy management system), and an intelligent control substation in each zone real-timely monitors the bus voltage of the zone, power-receiving channel overload, main transformer overload in the zone and voltage instability of the power grid in the zone, and starts the power grid safety and stability control operation; the acquired real-time data of the power grid is integrated with the information uploaded by each substation to real-timely form tide section data of the power grid, and the safety and stability of the power grid are evaluated online; and safety and stability early-warning information of the power grid is provided by using the real-time operation data of the power grid to realize safe and stable control of the power grid and to realize the function of the second line of defense of the power system. The method provided by the invention can ensure safe and stable operation of the power grid by regulating a stability control device according to the running condition of the power grid.

The invention discloses a real-time recommendation system and method of financial products of banks based on Naive Bayesian classification wherein the method comprises: acquiring the data of a bank business system, a peripheral system, and an internet / mobile internet; processing and storing the data in a basic database; conducting characteristic processing to the data attributes of the customers in a certain area; converting for data characteristics to develop a characteristic database; classifying the data in the characteristic database as a training data set and a verification data set which are used respectively for the training and estimating of a Naive Bayesian classification algorithm model; obtaining a model base after several times of iteration; identifying the characteristics of customers and in combination with the Naive Bayesian classification algorithm model base, matching the customers with the financial products they are mostly likely to purchase in real time; and recommending to the customers the financial products that are forecasted and matched by the models. The recommendation system and method of the invention are capable of helping customers to find out suitable products, therefore, increasing the user experience and the bonding effect of the customers to the financial products, lifting up the transferring rate of the products and making the bank more competitive.

The invention relates to an emergency protection circuit device capable of completing automatic switching when an AC-DC power grid is in an abnormal state, and in particular relates to an intelligent warning and control system dedicated for ensuring safety and stability of a power grid. The intelligent safety and stability early-warning and control system comprises a distributed computing platform and a multilevel zone control network, wherein the multilevel zone control network is composed of an intelligent control master station, intelligent control substations controlled by the intelligent control master station and arranged in each zone, and a plurality of intelligent control terminal stations respectively connected with each intelligent control substation; and two-way connections are constructed between the intelligent control master station and the intelligent control substations, between every two intelligent control substations and between the intelligent control substations and the subordinate intelligent control terminal stations. The real-time running data of the power grid is used to provide safety and stability early-warning information of the power grid so as to realize safety and stability control of the power grid and to realize the function of the second line of defense of the power system. The system provided by the invention can ensure safe and stable operation of the power grid by regulating a stability control device according to the running condition of the power grid.

The invention discloses a sewage filter plant, which comprises a support, a water inlet channel, a rotating disc, a rotating shaft, a water scouring sprayer, a driving motor and a speed reducer. Two filters capable of switching are arranged on a suction opening pipeline of a water pump, a pressure sensor automatically detects a water pressure setting value, when blocked, a filter screen is automatically replaced and cleaned, the total process is finished instantly, and the water pump does not stop. The sewage filter plant has the advantages of simple structure, low cost and power consumption, capabilities of effectively avoiding blockage due to dirt and guaranteeing stable operation of a system, and the like.

The invention proposes a solid-state transformer with an alternating current-direct current fault continuous operation capability and a control method. A hybrid modular multi-level converter bridge arm consists of a half-bridge sub-module and a full-bridge sub-module; the half-bridge sub-module and the full-bridge sub-module are interconnected with input ends of isolated dual active bridge converters through a sub-module direct current capacitor; output ends of multiple isolated dual active bridge converters are connected in parallel to form a low-voltage direct current bus; and the low-voltage direct current bus is connected to a three-phase full-bridge inverter. The solid-state transformer provided by the invention can provide a medium-voltage direct current port, a medium-voltage alternating current port, a low-voltage direct current port and a low-voltage alternating current port, so that multi-voltage-grade and multi-form alternating current-direct current hybrid power distribution network interconnection can be realized; the solid-state transformer has the alternating current-direct current fault continuous operation capability, quick switching of device operation modes whena short circuit or open circuit fault occurs on a network connected to any port can be realized, and continuous operation between non-faulty ports can be ensured, thereby improving the power supply reliability of the alternating current-direct current hybrid distribution network.

The invention discloses a dual-computer hot backup system, and relates to the technical field of backup. The dual-computer hot backup system comprises a master server (1), a slave server (2), a fiber switch (3), a fiber memory (4), and a network switch (5). The master server (1) is connected with the slave server (2) through a heartbeat line (6). Two ends of the fiber switch (3) are connected with the master server (1) and the slave server (2) separately. Two ends of the network switch (5) are connected with the master server (1) and the slave server (2) separately. The fiber switch (3) is connected with the fiber memory (4). The dual-computer hot backup system has advantages of high reliability, high safety and low cost.

The invention discloses a main base station of submarine observation network based on a constant-current power supply. The main base station is connected in series in a backbone network submarine cable. The main base station is connected with a shore base station and an adjacent main base station through a submarine cable terminal box. The main base station comprises an underwater power supply anda communication control module. The underwater power supply is used for converting a constant-current power supply provided by a shore base station into a power supply of the main base station and aplurality of backup power supplies, outputting a direct-current constant-voltage power supply to the communication control module, and controlling the main base station to be networked and offline. The communication control module is used for monitoring the internal state of the main base station in a master control backup manner and sending the state information and data uploaded by the externalequipment to the shore base station. The communication control module is also used for receiving an instruction of the shore base station to perform fault isolation when the internal state has a fault. The main base station of submarine observation network based on the constant-current power supply has the advantages of high power and high reliability. The problems that a constant-voltage power supply type main base station is poor in submarine cable fault resistance and poor in robustness are solved.

A computer apparatus and a method of diagnosing are provided that increase reliability and make non-stop operation possible even at a hardware repair, replacement, or addition time. The computer apparatus, which comprises a main OS and a sub OS, may have a peripheral device or an I / O card repaired, replaced, or added with power on. The repaired, replaced, or added hardware component is disconnected from the main OS. With the main OS performing usual processing, the sub OS uses a test / maintenance program to check the operation of the repaired, replaced, or added hardware component and then passes the control of the hardware component to the main OS.

The invention belongs to the field of environmentally-friendly purification, and relates to a method for removing acidic gases through a biological technology. The method is mainly used to remove acidic gas flow containing carbon dioxide, hydrogen sulfide, carbonyl sulfide, carbon disulfide and mercaptan. A chemical absorption, microbial oxidation regeneration and biotrickling filter three-tower technology is adopted, and the chemical absorption characterized in that an alkaline solution is used to absorb carbon dioxide, hydrogen sulfide and a small amount of organic sulfur which are introduced to the alkaline solution; the microbial oxidation regeneration realizes biological oxidation of sulfides into biological sulfur under aeration conditions and alkaline solution regeneration; and biotrickling filter purification of organic sulfur is used for removing carbonyl sulfide, carbon disulfide, mercaptan and other organic sulfurs. The method adopting carbon dioxide fixation, sulfur resource recovery, absorption liquid recycling and organic sulfur deodorizing purification realizes acidic gas integral treatment, and solves the environmental protection problem of acidic gas pollution.

The invention relates to a novel filter capable of measuring liquid flow rate and continuously working, which comprises a surface body, a bottom plate, an inner core and an electromagnetic sensing annunciator. The inner core is a main structure part and consists of an impeller, a rotating shaft, a filtering screen and a scrapper. The surface body and the inner core form two channels to separate fluid from impurities. The fluid flows into the filtering screen from the bottom plate, flows out from the surrounding part, and flows by the impeller, and finally flows out from the top end of the surface body. The impeller is driven to rotate when the fluid flows by the impeller, and the rotation speed of the impeller and the fluid quantity have fixed quantity relation, the change of the flow rate can be displayed and the stability of the system can also be detected. Meanwhile, because the impeller is coaxial to the scrapper, the scrapper is driven to rotate to automatically clean impurities on the inner wall of the filtering screen; the impurities can also be cleared when the system runs so as to ensure the continuity of filtering operation. The invention also has functions of a flowmeter and a filter; and therefore, the filter has strong practicability.

The invention discloses a carbon dioxide overlapping-type commercial refrigeration system. The system is characterized in that a high-temperature stage loop and a low-temperature stage loop constitute an overlapping-type refrigeration loop; a plurality of refrigeration compressors connected in parallel are respectively arranged in the high-temperature stage loop and low-temperature stage loop; the high-temperature stage loop adopts an R404A, R134a, R717 or R410A environment-friendly refrigerant; and the low-temperature stage loop uses a natural working medium R744. The system has the advantages of high safety and reliability and energy saving, is convenient to operate and control, and can provide a refrigeration, freezing or quick-freezing cold source for food production, storage and transportation, and marketing enterprises.

The invention relates to the storage technique in the filed of data communication, using multi level buffer storage system. The said system comprises a first storage unit, hard disk, control module, with the said first level storage unit being disk buffer area for writing and reading of data temporarily with the said control module used for controlling the reading and writing of the data, the secondary level storage unit writing the temporarily stored data of the first level storage unit based on the instruction of the control module, introducing the self stored data to the hard disk before the stored overall data arriving the preset valve value. It can increase the protection for hard disk, extending its usage, improving the reliability and stability of the storage system.

The invention discloses a processing apparatus for drying sludge by utilizing waste heat of a draught fan and a method for using the same. The processing apparatus comprises a solar energy greenhouse, a sludge pressure delivery system, a sludge drying system, an exhaust gas circulation system. The sludge pressure delivery system that is arranged inside the solar energy greenhouse includes a screw pump or a plunger pump, a sludge arrangement machine and a belt conveyor. The exhaust gas circulation system that is connected with the solar energy greenhouse includes an inlet device, an aeration blower, a heat exchanger and a filter, wherein the inlet device is used for adjusting the air input according to the temperature and the humidity. The sludge drying system that is arranged inside the solar energy greenhouse includes a screw pump or a plunger pump, a sludge arrangement machine, a sludge turning-throw device, a aeration blower waste heat heating system, a heat exchanger and a temperature controller. And the aeration blower is used for waster heat recovery as well as gas circulation and ventilation. According to the invention, during the sludge processing process, the energy can be effectively saved and the power consumption can be reduced, so that energy conservation and emission reduction can be realized in a real sense.

The invention relates to CNC linkage integrated equipment. The CNC linkage integrated equipment comprises a supply device, a receiving device, a manipulator rail and a machine tool system, wherein the two ends of the manipulator rail are respectively connected with the supply device and the receiving device, and penetrate through the whole machine tool system; the machine tool system comprises multiple general machine tools; all the general machine tools are serially connected; the material transportation among the machine tools is realized through the manipulator rail; all the general machine tools in the machine tool system transfer materials through manipulators; the multiple manipulators on the manipulator rail perform a reciprocating motion to finish the transfer of the materials on a whole production line; the materials linearly flow on the whole production line without shifting outside the CNC linkage integrated equipment; and the design enables the CNC linkage integrated equipment to realize unmanned factory management to a certain extent.

The elevator consists of mainly main body, driving tracks, control system and power supply. The driving tracks include upper one and lower one connected to the positive pole and negative pole of the power supply separately; the main body has chain wheel matching chains in tracks for transmission; the control system consists of main body controller, main controller, floor control boxes and calling and lighting boxes connected together; and the main power supply adopts mode of low voltage DC, accumulator float charging, and double-track intermittent powering. The present invention has simple structure, and combines programmable controller, frequency-division bi-directional coaxial multiplex transmission and infrared point-to-point communication, and may be used in shorter building.

The invention discloses a pipe inner wall variable-diameter grinding device which comprises a variable-diameter grinding mechanism, a revolution drive member, a front displacement support mechanism, afront grinding support mechanism, a rear displacement support mechanism and a rear grinding support mechanism. The front displacement support mechanism and the front grinding support mechanism are arranged at one end of the variable-diameter grinding mechanism, and the rear displacement support mechanism and the rear grinding support mechanism are arranged at the other end of the variable-diameter grinding mechanism; the variable-diameter grinding mechanism is used for grinding the pipe inner walls; and the front displacement support mechanism and the rear displacement support mechanism alternately provide axial displacement for the variable diameter grinding mechanism, and the front grinding support mechanism and the rear grinding support mechanism are used for providing radial supporting force. By means of the pipe inner wall variable-diameter grinding device, the front grinding support mechanism and the rear grinding support mechanism are used for supporting the variable-diameter grinding mechanism, the variable-diameter grinding mechanism adjusts the action radii according to pipes with different pipe diameters, rotation is carried out under driving of the revolution drive member, weld beading, welding slag and rust spots on the pipe inner walls are ground to form a smooth surface, and the front displacement support mechanism and the rear displacement support mechanism alternately provide the axial displacement to complete grinding of the entire pipe inner walls.

A fully-automatic chemiluminescence immunoassay analyzer provided by the invention includes a frame provided with at least one supporting frame, a control system, a delivery mechanism, and a station group arranged on the at least one workbench; the station group comprises a functional station group, a liquid taking station group and a cuvette storage area, the functional station group includes anincubating area, a cleaning area and a detecting area, and the liquid taking station group includes a sample area, a reagent area and a tip storage area for storing pipette tips; the delivery mechanism allows a sample from the sample area and a reagent from the reagent area to be mixed in cuvettes under the control of the control system in order to obtain a substance to be detected, and sequentially delivers the substance to be detected to the incubating area, the cleaning area and the detecting area; and the analyzer also comprises a liquid feeding station unit, the liquid feeding station unit comprises at least two liquid feeding stations used for adding a liquid taken from the liquid taking station group into the cuvettes, and every liquid feeding station corresponds to at least one cuvette. The fully-automatic chemiluminescence immunoassay analyzer has the advantages of smooth working process and high efficiency.

The invention relates to a mooring chain fatigue strength testing method. Three groups of samples are needed for single test; three of the seven common mooring chain rings are used for the common test, and the other four common mooring chain rings are used for the supplementary test after the failed test. All the samples comprise connectors, and serial numbers need to be carved on the connectors. All the samples comprise the connectors, and mechanical testing needs to be carried out according to the classification society requirements. All the samples comprise the connectors, and the visual detection, the magnetic particle detection and the ultrasonic detection need to be carried out after the tension test and the cleaning are carried out. Before performing shot blasting, all the chain rings and the connectors need to be checked to find out scratches, burrs or other surface defects. A loading unit approved by the classification society is used for measuring. The mooring chain fatigue strength testing method comprises the steps of recording upper load limit and lower load limit, recording testing frequency and recording fatigue testing times. The test result meets the requirements of the classification society and the international standard, and the mooring chain fatigue strength test method is improved to be more perfect.

The invention provides a three-level six-phase permanent magnet synchronous motor dual-mode operation control system and control method. The power level of a three-level inverter is limited at present, the harmonics are relatively high and the torque ripple of the motor is high. The system is composed of a control circuit. The PWM signal outputted by the control circuit is electrically connected with a drive circuit (5). The drive circuit is electrically connected with a six-phase inverter (2). The six-phase inverter is electrically connected with the three-phase uncontrolled rectifier circuit(1) of a frequency converter. A phase missing detection circuit (4) is connected in parallel on the front end of the three-phase uncontrolled rectifier circuit of the frequency converter. The rear end of the three-phase uncontrolled rectifier circuit of the frequency converter is electrically connected with a bus voltage detection circuit (3). A phase missing detection circuit and the bus voltagedetection circuit are electrically connected with the A / D interface of a controller. The six-phase inverter is inputted to the A / D interface of the control circuit through a six-phase current sampling circuit 12. The control system and the control method are used for dual-mode operation control of the three-level six-phase permanent magnet synchronous motor.

The invention relates to the field of defrosting control, in particular to a refrigerator intelligent defrosting control method, a controller, refrigeration equipment and a storage medium. The controlmethod comprises the steps that a refrigerator compressor enters a defrosting cycle; in the defrosting cycle, when a door of a refrigerator is opened, the defrosting time t of the cycle is graduallyreduced according to the number of times of door opening; when the defrosting time t is reduced to t13, defrosting is conducted immediately; and when the defrosting time t is not reduced to t13, if the fact that chamber temperature is raised to T1 or continuous working time of the compressor is larger than t14 is judged, defrosting is conducted immediately. Considering that the door opening time is too long or a large quantity of heat loads are put in, the temperature in the refrigerator is increased sharply, and the operation time of the compressor is prolonged, whether defrosting is needed or not is judged according to the multiple factors such as the number of times of door opening, real-time temperature of a chamber, and operation time of the compressor during defrosting judgment in the technology, decrease of the refrigeration efficiency caused by too much frost of an evaporator can be reduced through rapid defrosting, and the situation that the heat loads in the refrigerator aretoo large, and the compressor operates continuously without shutdown is prevented.

The utility model relates to a double-stage matrix converter for Mega Watt wind turbine, belonging to the technical filed of wind turbine, and comprising a motor side converter and a net side converter. The utility model is characterized in that the motor side converter and the net side converter are respectively formed by connecting three-phase bridge type arms in parallel which consist of six double-direction switches with same structure. Each double-direction switch is formed by reversely connecting the common emitters of two insulated double-stage transistors in series or reversely connecting the common connectors of two insulated double-stage transistors in series. The motor side converter and the net side converter are back-to-back connected with each other through a DC bus-bar. The utility model has the advantages of good input and output performance, reversible energy transmission, no energy storing element needed in the DC link, real time control on the rotation of the wind turbine motor unit and adjustable input and output power factors of the motor unit.

The invention relates to arrangement equipment for packaging with a supporting and sending device. The arrangement equipment comprises the supporting and sending device, a pressing and packaging part, a pushing and arranging part and a bearing part; the supporting and sending device is composed of a rotary shaft and a plurality of supporting units fixedly arranged in the circumferential direction of the rotary shaft; each supporting unit is composed of a supporting rod and a supporting plate fixed at the end part of the supporting rod; the pressing and packaging part is composed of a pressing device and a packaging device; the pressing device is composed of a lifting rod and a pressure plate fixed at the end part of the lifting rod; the pushing and arranging part is composed of a transmission part driven by the lifting rod and a baffle part which slides along a workbench driven by the transmission part; the bearing part is composed of moving rod driven by the lifting rod and a bearing plate which rotates around a fixing shaft arranged at the upper section part of a bracket driven by the moving rod; and a through groove through which the supporting and sending device rotates is formed in the bearing plate. According to the arrangement equipment, the problems of untidy piling of paper boxes before packaging, infirmness in loose packaging, large equipment operation noise, instability in whole transmission of cached and piled paper boxes and up and down irregularity are overcome

The invention discloses a device and a method for smoothly upgrading an information system. The device comprises a database synchronization management module, a database system and a memorizer F, wherein, the database system consists of a new version database and at least one old version database; a synchronizer trigger used for recording modifications is respectively arranged in the databases; the memorizer F is connected with the database system and is used for recording updating information; when a database is changed, the synchronizer trigger arranged inside the database records asynchronous updating contents automatically according to marks for operation source and records the asynchronous updating contents into the memorizer F; the updating content in the memorizer F is monitored on a real-time basis by the database synchronization management module; and synchronous operations among databases can be performed. The invention ensures that the uninterrupted running can be realized during the information system upgrading process.

The invention provides a magnesium oxide board pushing type stereoscopic storage device and a storage method. The device comprises a stereoscopic storage rack assembly for storing magnesium oxide boards, a board pushing assembly for pushing the magnesium oxide boards, a baffle assembly for preventing the magnesium oxide boards from rushing out of storage racks due to inertia after the magnesium oxide boards enter the stereoscopic storage racks, and a lifting table assembly for moving the stereoscopic storage rack assembly, the board pushing assembly and the baffle assembly up and down so that the magnesium oxide boards can be fed into the stereoscopic storage racks successfully. When one stereoscopic storage rack is filled with the stored magnesium oxide boards, all the boards are pushed by the magnesium oxide board pushing type stereoscopic storage device to another unoccupied stereoscopic storage rack at a time, so that new magnesium oxide boards can be received. The effect that after one stereoscopic storage rack is filled with the magnesium oxide boards, all the magnesium oxide boards can be pushed to another unoccupied stereoscopic storage rack rapidly is achieved, the effect that a production line can be operated in a non-stop mode is achieved, and the operation efficiency of the production line is improved.

The invention discloses a safety system based on a power grid statistical data searching method, which comprises an application safety protection unit, a data safety protection unit, a host safety protection unit, a network safety protection unit and a physical safety protection unit, wherein the application safety protection unit is used for safety of the system application; the data safety protection unit is used for considering the system data safety from aspects of data integrity, data confidentiality, data backup and recovery; the host safety protection unit is used in a system host safety range and comprises a server, a terminal, and an operation system and a database system of a working station; the network safety protection unit considers the system network safety from aspects of structure safety and access control; and the physical safety protection unit is used for system physical safety and comprising safety of a computer room, a monitoring hall and an office place, and considers the safety from aspects of physical position selection and physical access control.

The invention provides a method for calling a background task through a notification bar based on an Android system. The method includes the steps that A, when a background task notice in the notification bar is touched to be selected by a user, an application program assembly which is started by the notification bar is established; B, the background task which is touched to be selected by the user is started through the established application program assembly, and the background task is switched to a foreground to be displayed; C, the established application program assembly is closed. Consequently, the software task can be skipped to the foreground from a background, continuous operation is achieved, and therefore the problem that a main interface program assembly of monitoring software is established again when the monitoring software is started by the notification bar can be solved.

The invention discloses a wireless vehicle-mounted USB flash drive video recording control device with a hard disk backup function, wherein a central processing unit detects the information of a USB storage control module or a CAN bus control module and starts to record videos; a multipath video switching module selects a channel which needs to record the videos; an audio / video coding module codes audios / videos; the central processing unit writes information into a video recording file; a real-time clock module sends date and time parameters of a system to the central processing unit and displays date and time on the video recording file; the USB storage control module stores the video recording file in an external storage medium in real time; and a hard disk backup module can backup data inside the USB storage medium in a hard disk and can also read and write digital data inside the hard disk through a network module. The invention has a CAN bus control function, a U flash drive storage function, a hard disk backup function and a network transmission function and can collect various data through real-time monitoring, thereby being convention to timely master occurred information and events.

The invention relates to a virtual cloud desktop security access method based on deep protection, which comprises the following steps of: analyzing according to a business flow direction, reasonably dividing security areas, analyzing according to the business flow direction, establishing a security area model, and dividing the security area model into five security areas, namely a security servicearea, a wired access area, a wireless access area, a security support area and a security interconnection area; And performing virtual deep protection, and for security threats faced by a virtualization layer, realizing isolation of a virtual network by designing a virtual network identifier to route and forward a data frame. Through the functions of virus prevention, access control, intrusion detection / intrusion protection, virtual patches, host integrity monitoring, log auditing and the like, comprehensive protection of a virtual host and a virtual system is achieved, different regional networks, different users and different applications are achieved, and different depth protection strategies are adopted to achieve deep-level safety protection of the virtual cloud desktop.

The invention discloses an implementation method for deploying an object storage back-end service by referring to a traffic type. According to the method, high availability and safety of each flow line are comprehensively considered according to a deployment mode of an object storage back-end service, different protocols are adopted according to different data flow types, and different networks are divided for transmission so as to consider data transmission efficiency. Compared with an existing deployment mode, the kubernetes cluster is adopted to manage the deployment nodes in architecture,unified management and maintenance of deployment service applications are facilitated, and cross-platform deployment supported by a set of deployment programs is achieved. Network partitioning is morespecific, and separation of user data and management data is achieved, separation of the user backup data and other data of the user and separation of the data flow avoid mutual influence among various services at a service peak value, upgrade and maintenance of a network environment are facilitated, object storage back-end services can be deployed quickly, and the deployment cost and daily upgrade and maintenance cost of operation and maintenance deployment personnel are greatly reduced.

The invention discloses an energy storage inverter grid-connected and stand-alone seamless switching control algorithm based on complex variables, belonging to the distributed power supply grid-connected control field. The energy storage inverter grid-connected and off-grid seamless switching control algorithm can be applied to large-scale microgrid operation mode seamless switching control, guarantees uninterrupted power supply of key charges and stable operation of the distributed power supply during a switching process, and improves reliability of power supply of the microgrid. The energy storage inverter grid-connected and stand-alone seamless switching control algorithm connects voltage control, current control and a frequency locking ring in series to become an organic integrity and thus a seamless switching control flow is simplified. The energy storage inverter grid-connected and stand-alone seamless switching control algorithm utilizes a dynamic internal mold which has infinite gain and has a polarity selection characteristic at an appointed frequency, designs a frequency locking ring structure having characteristics of a discrete resonator and realizes that the phase of output voltage does not mutate during the process of transferring from the grid-connected operation to the stand-alone operation of the microgrid. The energy storage inverter connected-network and stand-alone seamless switching control algorithm adopts linear secondary type optimal adjustment, designs a unified calculation algorithm for complex control parameters and simplifies a multi-complex-parameter design process.