186results about How to "Full potential" patented technology

The invention discloses a multi-microgrid interconnected operation coordinated scheduling optimization method in consideration of interaction response. The method comprises the following steps: initializing a system and acquiring a related parameter in the day-ahead optimization process, wherein each microgrid independently solves the respective optimization strategy according to the initialization information; and then performing information interaction in a microgrid cluster to share the respectively acquired optimal strategies, and updating the system state information, wherein a system control center judges whether the Nash equilibrium is achieved; entering the intra-day optimization stage, performing short-term prediction on the scenery output and load demand, inputting the short-termprediction data in single microgrid to establish an optimization model, performing rolling optimization on the system and solving the same; selecting all control variables in a control time domain asthe actual scheduling scheme after the solution is finished, waiting for the next optimization period, and repeating the above optimization process. Through the optimization method disclosed by the invention, the consumption capacity on the new energy by the microgrid and the system reliability in the fault can be effectively improved, and the economic benefit of the microgrid is increased to a certain degree.

The invention provides a data storing, managing and inquiring method and system for a distributed key-value storage system. The method comprises the following steps: before storing data, respectively converting data into ordered character strings according to different data classifications and then storing the ordered character strings into the distributed key-value storage system, wherein storage sequences of the converted character strings sequenced according a dictionary sequence are consistent with numerical value sequences before conversion; and during data retrieval, the same conversion is carried out on the numerical values in retrieval conditions. The method provided by the invention supports storage and retrieval of complex data classifications and includes complex data inquiring methods, such as multi-field attribute inquiring, multi-data classification inquiring, numerical value statistic analysis and the like.

An aero-engine online optimization and multivariable control design method based on model predictive control achieves the control and online optimization of multiple variables of an aero-engine undera constraint and according to requirements of thrust and speed. A control system consists of two parts. The first part is a prediction model acquisition layer. Based on the actual working state of each control cycle and the external environmental parameters of the aero-engine, an engine small deviation linear model near different steady-state points is continuously established, and model parameters are provided for a model predictive controller. The second part is a control law decision layer. A closed-loop structure is formed by the model predictive controller and an external output feedback.The model predictive controller, based on an engine model in the current state, a control command and relevant constraint limits, determines the output of the controller at the next moment by solvinga linear optimization problem. The external output feedback introduces the aero-engine actual output into the decision on future controlled quantity of the controller to compensate for the influenceof model mismatch and external disturbances.

The invention provides a large-scene airborne point cloud semantic modeling method. The large-scene airborne point cloud semantic modeling method specifically comprises the following steps: 1) classifying ALS point cloud scenes; (2) building semantic element identifiers; (3) building semantic element identifiers; (4) making precision evaluation. The method has the advantages of (1) fusing multiplecurrent modeling ideas to reflect flexibility of a modeling method, (2) improving the possibility of processing large-scale point cloud data through an algorithm, and (3) guaranteeing the integrity of model information in the aspects of geometry, topology and semantics.

The invention provides a modeling method for a generator excited system which comprises the following steps: (1) obtaining the idle load characteristic of the generator, the idle load and the load characteristics of an exciting dynamo, the time constants of the generator and the exciting dynamo, the phase position and frequency characteristic of the generator excited system and the damping effects of low frequency oscillation by experiments; (2) building a field system model; (3) analyzing the obtained basic data to obtain normalized model parameters, building an original simulation model in a Matlab emulator to carry out step response simulation and carrying out corresponding corrections of the parameters in the model according to simulation calculation and field experiment errors until the errors meet the requirements; (4) transforming the parameters into practically useful model parameters in a power system analyzing program and carrying out further correction of the model parameters in the program according to the specific characteristics of the original model. The model parameters of the field system obtained by the invention have the advantage of enough precision, which can really reflect the performance indexes of the field system.

The invention relates to a thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of a power grid. The method includes the following steps that a thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid is added to a logical configuration coal feed amount control loop of an original coordination control system; logical configuration of a thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid is carried out, and output of the logical configuration of the thermal power generating unit coal feed amount control loop based on frequency modulation is introduced to the thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid to serve as feedforward signals for controlling the coal feed amount; the control system is put into actual operation, according to the real-time operation curve, relevant parameters of the thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid are set online, and finally the expected control effect is achieved. By means of the existing DCS coordination control system, the real time performance is good, the on-site debugging process is simple, and project realization is facilitated. By judging the operating state of the unit, the coal feed amounts of the unit in different operation states are accurately controlled, fast load response of the unit participating in frequency modulation and peak regulation and the stability of main parameters are guaranteed, the labor intensity of operators is reduced, and the safety and the economical efficiency of operation of the unit are greatly improved.

The invention relates to a power distribution network planning method based on maximum power supply capacity, which comprises the following steps of: obtaining status quo power grid data and load forecast data; judging whether the distance between a new load and an existing substation is longer than a first threshold value; if the distance between the new load and the existing substation is more than the first threshold value, which indicates a blind area for power supply exists, taking Class C measures, and establishing a new substation; otherwise, calculating the maximum power supply capacity of the existing power grid; when the maximum power supply capacity is higher than the planned total load, the load of each main transformer is matched with the maximum power supply capacity and each load horizontally meets the requirements of safety verification of the main transformers N-1, stopping the process, otherwise, taking Class B and C measures to adjust the total power supply capacity; or taking Class A measures to adjust the distribution of loads among the main transformers. By adopting the method, the dependence on capacity-load ratio indicators can be reduced, the potential of the existing network can be fully utilized, the construction of power grids can be postponed, and the problems of land shortage and high cost for construction of power grids can be solved; and the allocation scheme of loads matched with the allocation of the maximum power supply capacity can be provided to achieve the purpose of fully utilizing the power supply capacity of the power grids.

The invention relates to a flow characteristic correction method for a steam turbine high pressure control valve of a thermal power generating unit. The flow characteristic correction method comprises the following steps: additionally arranging a flow characteristic correction control loop interface of the steam turbine high pressure control valve of the thermal power generating unit in the logical configuration comprehensive valve position control loop of an original steam turbine digital electric hydraulic control system; carrying out the logical configuration of a flow characteristic correction control loop of the steam turbine high pressure control valve of the thermal power generating unit, and outputting and introducing the logical configuration into the flow characteristic correction loop interface of the steam turbine high pressure control valve of the thermal power generating unit as the offset correction signal of a comprehensive valve position command; putting a control system into actual operation, setting relevant parameters of the flow characteristic correction control loop of the steam turbine high pressure control valve of the thermal power generating unit on line according to a real-time operation curve, and finally achieving a prospective control effect. The opening of the steam turbine high pressure control valve when the unit participates in frequency modulation and peak modulation corresponds to the linearity of main steam flow, so that the equipment potential is fully developed, and the stability of main parameters is guaranteed while the frequency modulation and peak modulation requirements of a power grid are met.

The invention provides a collagen-based dura on the basis of a process-friendly type ion liquid on-site spinning technology, and a preparation method thereof. The preparation method comprises the steps of: dissolving I type collagen by a novel process-friendly solvent system-ion liquid and sodium salt composite system, fully soaking by taking decellularized pig dermis as a substrate through an electrolyte solution, carrying out electrostatic spinning by taking air as a medium, and regulating the pore structure of collagen fibers by adjusting the electrospinning conditions; removing residual ion liquid with a proper eluent, and carrying out freeze-drying, sterilization and packaging to obtain the collagen-based dura. The collagen-based dura has two or more layers of structures: the aperture of collagen fibers at one side close to brain tissue is controlled to be 3mu m and below, and the aperture of collagen fibers at one side far away from brain tissue is controlled to be 20mu m and above. Compared with the traditional solvent spinning, the preparation method is process-friendly, the toxic and side effects are reduced, and the triple-helical structure of the collagen can be furthest retained.

The invention relates to a technique for manufacturing a tube rolling tool of hot rolling seamless steel tube, in particular to a technique for manufacturing a rolling machine mandril of a PQF which belongs to the processing technique of workpiece. The invention provides a novel technique for manufacturing the mandril of a tube rolling; the technical scheme adopted by the technical problem of the invention is as follows: refining a steel ingot-forging and blooming-rolling and shaping-surface rough machining-hardening and tempering processing-fine machining and polishing-surface plating. The technique is characterized in that the rolled mandril has the advantages of smoother surface, less bending degree of a blank as well as a small size tolerance. The technique is characterized in that the basic body of the mandril has a high temperature obdurability and the surface of the mandril has excellent wear-resistance. The technique has the beneficial effects that: the manufacturing technique of the mandril is more reasonable; the potential of a device is fully exerted; the yield rate and the production efficiency are high; the cost is low; the quality of the mandril is excellent; the social benefit is remarkable; besides, the manufacture technique brings broad prospects for manufacturing the mandril of the tube mill.

The invention provides an energy source local area network energy storage system automatic demand response method based on a block chain technology. The method comprises the following steps of obtaining state information of the energy storage system connected into an energy source local area network; building an energy storage system charging and discharging model; building an electric automobileschedulable capability comprehensive evaluation system; using a real-time electricity price mechanism; setting charging and discharging electricity price orienting electric automobile users; finally developing a decentered automatic demand response criterion on the basis of the block chain technology; building an intelligent contract between two trading parties. By aiming at the energy source local area networks comprising an electric automobile cluster, a wind light power generation system and an energy storage battery, a distributive node network for charging and discharging by the user is built by the invention for pursuing point-to-point direct trading of mass users; reasonable configuration of inside resources of the system is realized; the autonomous supply and demand balance state is achieved.

The invention discloses a capturing circuit and a writing control method of 10G EPON (10 Giga Ethernet Passive Optical Network) messages. The writing control method comprises the following steps: receiving EPON messages interacting among 10G EPON OLT (Optical Line Terminal) and ONU (Optical Network Unit) through an optical module and a 10G SERDES (Serializer / Deserializer); combining and triggering message capturing according to set conditions after the decoding at a PCS (Physical Coding Sub-layer); writing the captured message into capturing cache, wherein the steps and formats for storing the capturing frames are as follows: writing 128bit frame data at an even number clock period while a frame envelope is valid; and writing the frame head byte number, the frame end byte number, the reaching time, the frame error indication, CRC (Cyclic Redundancy Check) verification error indication and frame boundary symbol of the frame within a clock period at the frame end. With the adoption of the capturing circuit and the writing control method, continuous EPON messages of 10 G can be captured and analyzed rapidly and precisely; the storage space of the captured message is reduced through specific triggering and screening conditions; the performance and the use efficiency of the remote scheduling are improved; and the inter-compatibility of factories of different equipment is enhanced.

The invention discloses an electric vehicle ordered charging and discharging control method considering user evaluation based on fuzzy control. The method comprises the following steps: S1, constructing an ordered charging and discharging framework based on fuzzy control; S2, the EV control terminal acquiring new access state information at the beginning stage of each time period; S3, sequentiallybringing all the electric vehicles into a queue waiting for obtaining a next-stage charging and discharging instruction according to the time sequence; S4, comparing a calculation result of the fuzzycontroller with a set constraint condition, and making a charging and discharging plan of the target electric vehicle again based on the constraint condition; S5, if the queue is emptied, uploading the updated power grid load state to a distribution network operator and waiting for the start of the next control time period; and S6, determining whether the ordered charging and discharging controltasks of all the control time periods in one day have been completed or not at present, and if so, ending the charging and discharging control task of the day. According to the method, the user evaluation is improved, and the purposes of reducing the power grid load fluctuation rate and performing peak clipping and valley filling are further achieved.

The invention relates to a running error calculation method of an intelligent ammeter at a low-voltage zone. The running error calculation method comprises the following steps of (1) pre-processing data, analyzing original power utilization data acquired by an acquisition system, combing and classifying dirty data, and pre-processing the data according to classification; (2) circularly selecting rebuilt data by a time window after data pre-processing is completed; (3) building a model equation set by the selected data, and solving the model equation set to obtain a calculation result; and (4)identifying an abnormal electric energy meter by an outlier detection algorithm according to a circulation calculation result. The dirty data is combed and classified, and the deficiency and abnormalpart in original data is processed; by a regularization method, the morbidity of the equation set is processor; and by the outlier detection algorithm, an abnormal object is marked, so that a new means is provided for calibration operation of the electric energy meter.

The invention discloses a large-curvature radioactive level horizontal drilling process and device includes drilling vertical well to oil layer, lowering the sleeve, drilling sleeve shoe, building up angle directionally, washing well, lifting the drill, lowering special sieve vessels, filling with gravels, decoupling the hanger for circulated well washing, lifting the hanger de-coupler and all drilling tools above, drilling other radial wells, etc. Through drilling a plurality of radial wells, the invention enlarges seepage area, expanding seepage range, increasing the daily production for single well and raises final recovery ratio, so as to achieve the purposes of making full use of energy, increasing economic benefits and benefiting the society.

The invention relates to an ethylene rectification tower system belonging to an ethylene device and a control method thereof. The invention provides a sensitive plate temperature control system and a control method thereof by combining the process operation characteristics in an ethylene rectification production process, comprehensively using latest technology in chemical engineering and automatic control science and adopting nonlinear control theory. The system and the method perform balancing control of the temperature deviation of discharged materials of two reboilers by arranging a temperature balancing control circuit and online adjustment of the flow rate of a heating medium entering the two reboilers and a load distribution proportion, ensure the gas and liquid phase balance in an ethylene rectification tower, stabilize the temperatures of a control sensitive plate and the discharged materials, overcome external disturbance caused by changes in the temperature and pressure of the heating medium, lay a firm foundation for the stable operation of the whole rectification tower and the 'optimized' operation of product quality, fully use the DCS in the ethylene device and the potential of operational equipment, and effectively utilize raw material and energy.

The invention discloses universal automatic pallet applying equipment suitable for different types of building block forming machines. The universal automatic pallet applying device is characterized in that a pallet storage conveying frame, a pallet lifting device, a pallet pushing device, a conveying bridge and a pallet moving device of a building block forming machine are arranged in a plane in matched manner and form a 'U' shape, and each device comprises a body, a transmission mechanism, an adjusting mechanism and an electric system. The equipment further comprises a control system with PLC (programmable logic controllers). The control system is connected with circuits of the electric systems to control power mechanism and the transmission mechanisms so as to allow a pile of pallets on the pallet storage conveying frame to be conveyed to the pallet lifting device, the pallet pushing device conveys the pallets one by one to a pallet box of a pallet conveyor. The universal automatic pallet applying equipment can be positioned and adjusted according to different sizes of the pallets, so that the universal automatic pallet applying equipment is suitable for different types of building block forming machines. The universal automatic pallet applying equipment has the advantages that the universal automatic pallet applying equipment is capable of achieving full-automatic, semi-automatic and manual control and is high in universality, automatic pallet applying is achieved, work efficiency is increased, labor intensity is lowered, investment is saved, production cost is lowered and the like.

The invention relates to the field of voice and image processing and mode recognition, in particular to an audio and video multi-mode sentiment classification method and system, and the method comprises the steps: carrying out the processing and calculation of original video data, and obtaining a video data sample, an audio data sample and a text feature sample; constructing an emotion feature extraction network, and performing feature extraction on the video data sample, the audio data sample and the text feature sample to obtain a visual modal feature, an audio feature and a text feature in multiple modalities; and carrying out dimension unification on the extracted visual modal features, audio features and text features, inputting the features into a tensor fusion network for fusion learning, and finally carrying out classification to output a multi-modal sentiment classification probability result. Cross-modal emotion information can be effectively integrated, space-time high-dimension feature extraction is carried out on videos, audios and texts, the videos, the audios and the texts are spliced into multi-modal feature vectors, fusion learning is carried out then, and emotion classification is carried out.

The invention relates to the technical field of microwave power device in semiconductor materials, discloses a AlGaN / GaN HEMT multilayer field board device of recessed grid, and meanwhile discloses a method for manufacturing AlGaN / GaN HEMT multilayer field board device of the recessed grid; on the basis of common AlGaN / GaN HEMT device manufacturing process, the method comprises the steps of photo-etching grid images after forming Ohm contact of a source electrode and a drain electrode, etching AlGaN extension layer of a part of the grid image, after evaporating grid metal, firstly manufacturing a grid connection field board and then a source connection field board to form the AlGaN / GaN HEMT multilayer field board device of the recessed grid. Utilization of the invention can efficiently improve puncturing characteristic, transconductance and threshold value voltage of the AlGaN / GaN HEMT device, and at the same time of improving the device plus, availably suppress phenomenon of current collapse of the AlGaN / GaN HEMT device.

The invention provides a target detection method of a dual-polarization receiving radar. According to the technical schemes of the invention, the target detection method comprises the following four steps of: the first step, dual polarization receiving: a radar receives target echo signals through adopting an orthogonal dual-polarization mode; the second step, matched filtering: the matched filtering output signals of an H polarization channel and a V polarization channel are calculated; the third step, low-threshold primary detection: CFAR detection is performed on the matched filtering output signals of the H polarization channel and the V polarization channel one point by one point, and a low-threshold coefficient is adopted as a detection threshold coefficient; and the fourth step, high-threshold confirmation detection: a low-threshold detection point set is processed according to different circumstances, so that low-threshold detection points can be screened out. The target detection method of the invention has the advantages of stable performance, simplicity and practicability.

The invention relates to a modification method of an aramid fiber. The method comprises the steps as follows: the aramid fiber is placed in a cryogenic treatment device provided with a cryogenic medium, and a container is closed; cryogenic treatment technological parameters are set as follows: the cooling rate is 0.5-50 DEG C / min, the treatment temperature is minus 90-minus 200 DEG C, and the treatment time is 3-15 h; and after the temperature returns to the room temperature, the aramid fiber is taken out of the cryogenic treatment device, and the treatment is finished. According to the modification method of the aramid fiber, the fiber abrasion resistance is improved, the roughness of the aramid fiber is increased, the bonding performance between the aramid fiber and a resin matrix interface is improved, and the comprehensive performance of the aramid fiber is improved.

The invention discloses an energy storage system automatic demand response method based on a non-cooperative game, and the method comprises the steps: obtaining the state information of an energy storage system accessed to an energy local area network, and building an energy storage system charging and discharging model; Constructing a utility function of a game participant to calculate the cost of the game participant after the game participant participates in the game; enabling Each game participant independently to formulate a strategy and perform an interactive game, and solve the respective cost minimization optimization strategy, thereby achieving the optimal target state of all the participants; And finally, simulating a power transaction process by utilizing a non-cooperative gamemechanism, and proving the effectiveness of the provided method. The non-cooperative game model of the energy storage system is established for the energy local area network, the consumption level ofrenewable energy sources is improved while the cost of individual participants is pursued to be minimized, and autonomous supply and demand balance and automatic demand response of the system are achieved.

The invention relates to a preparation method of modified carbon nanotube / graphene-resin conductive fibers .The preparation method comprises the steps that a carbon nanotube / graphene composite spinning solution is subjected to wet spinning and drying to obtain carbon nanotube / graphene-resin conductive fibers; the coagulating bath adopted for wet spinning is a resin coagulating bath; under a stretching condition, the carbon nanotube / graphene-resin conductive fibers are subjected to subzero treatment, then the temperature is returned to room temperature and maintained for a period of time, and the modified carbon nanotube / graphene-resin conductive fibers are obtained .The material has broad application prospects in the electronic textile field, electromagnetic shielding field and intelligent wearable field .The subzero treatment technological process and subzero treatment equipment are simple in structure .Compared with other modification treatment processes, more energy is saved, more production cost is reduced, and good development prospects are achieved.

The invention discloses an automatic transporting device for pallets of a building block forming machine. In the automatic transporting device, a pallet conveying rack (4) is in a 'T'-shaped plane arrangement with a pallet transporting rack (3) and in an 'n'-shaped arrangement with a pallet moving device (2). Blocks formed by a block forming machine (1) are carried away by a transport cart (C). When a front pallet (T) contacts a transport starting travel switch (ZDX) of the pallet moving device (2), a transport motor (8) is started to enable the pallet transporting rack (3) to convey the pallet (T) to the pallet moving device (2); when the front pallet (T) contacts a transport-stopping and conveying-starting travel switch (ZSX), the transport motor (8) stops, a conveying motor (20) starts and pallet conveying rack (4) conveys the pallet (T) to the pallet transporting rack (3); and when the pallet (T) contacts a conveying stop travel switch (STX), the conveying motor (20) stops and a new pallet (T) is placed on the pallet conveying rack (4). Thus, that pallets (T) are placed on all stations of a transmission mechanism is ensured, and the automatic transporting device orderly operates with the production of the block forming machine (1) to form an automatic circulating system. The automatic transporting device has the advantages of stable and reliable operation, time and labor conservation, low cost and high efficiency.

The invention relates to an air separation device for preparing oxygen and nitrogen through isobaric separation. In the air separation device, a Rankine cycle system with a similar thermal energy power cycle device at a low-temperature end is adopted, a liquid nitrogen washing process is adopted, and cold is replenished to the air separation device through a liquid nitrogen washing cold-replenishing system, so that nitrogen and oxygen can be prepared by performing isobaric separation on the air. Compared with the conventional advanced unit, the air separation device has the advantages that on the premise of the same refrigerating capacity, energy is saved by over 30 percent compared with the traditional advanced unit, equipment and materials are saved, and operation and adjustment are performed flexibly and conveniently; and meanwhile, multiple pressure grades and multi-gas supply can be realized conveniently through the air separation device, so that low-energy-consumption concentrated air supplying can be realized, the conventional air separation technology and theory are broken through, and remarkable economic, social and environmental protection benefits are achieved.

The invention discloses a variable speed wind turbine generator participation system frequency modulation method. The method comprises the steps that firstly, a wind turbine generator group is grouped to obtain multiple wind turbine generator sets; the frequency control dead zone and system frequency offset of each wind turbine generator set are set; then, when the system frequency offset exceeds the frequency control dead zone, wind turbine generator frequency control is triggered, and the frequency modulation operation mode is entered; the frequency modulation increment and frequency modulation time sequence of each wind turbine generator set are calculated; the frequency modulation increment and the frequency modulation time sequence are issued to each wind turbine generator set; finally, whether the system frequency of each wind turbine generator set exceeds the minimum point or not is judged; if yes, the wind turbine generator set exits from the frequency modulation operation mode; if not, according to the frequency modulation time sequence, frequency modulation operation is performed till the end. According to the variable speed wind turbine generator participation system frequency modulation method, on the basis of the wind power plant participation system frequency modulation time sequence control strategy, the wind turbine generator sets are coordinated for frequency modulation active power increment and time sequence exit, and the potential of variable speed wind turbine generator participation system frequency modulation is sufficiently excavated.

The invention relates to a precast expanding pile as well as a construction method and construction mechanical equipment thereof in the field of pile foundation engineering. The construction method of the precast expanding pile of the invention comprises the following steps of: sedimentating a hollow precast pile (2) into a preset depth, wherein the bottom of the hollow precast pile (2) is connected with a pile plug (1); moving away the pile plug (1) and pouring an immature pile body material into the hollow precast pile (2); squeezing the immature pile body material into a soil body at the lower part of the hollow precast pile (2) to form a pile bottom expanding segment (4); and repeating the steps until the pile bottom expanding segment (4) satisfies the requirement. The precast expanding pile obtained through the construction comprises the hollow precast pile (2) at the upper part, the pile bottom expanding segment (4) at the lower part and the pile plug (1) at the bottom, and high-efficiency construction equipment is developed, the pile in the form is convenient to construct, has reliable quality, greatly improves the bearing capacity of the end parts of the precast piles, such as PHC (Prestress High Cement ) tubular pile, hollow square piles, and the like which are widely applied at present and can be used as an pulling and compression resistant bearing pile with high bearing capacity and low manufacture cost.

The invention discloses an alternating-current and direct-current interconnected power grid Thevenin equivalent parameter online calculation method. The method includes the steps that equivalent impedance or equivalent current source processing is conducted on a direct-current power transmission unit in an alternating-current and direct-current interconnected power grid according to PMU measurement values to obtain a primary correction admittance matrix; equivalent impedance processing is conducted on the load of current state load nodes in the alternating-current and direct-current interconnected power grid to obtain a secondary correction admittance matrix after equivalent impedance processing; load impedance at the current state load node in the alternating-current and direct-current interconnected power grid is cut off, and a node admittance matrix for open-circuit voltage is calculated according to the secondary correction admittance matrix; according to the node admittance matrix for open-circuit voltage and node state information of all nodes in the current state, a node voltage equation for open-circuit voltage is calculated; Thevenin equivalent impedance is calculated, and accordingly all Thevenin equivalent parameters of researched load nodes in the alternating-current and direct-current interconnected power grid can be obtained.

The invention discloses an electric vehicle group scheduling method based on load classification. The method comprises steps of carrying out load prediction and electric vehicle behavior prediction; establishing a charging type electric vehicle load group scheduling objective function and a charging type electric vehicle load group scheduling constraint condition in G2V and V2G modes; optimizing the economic benefit of the power exchange type electric vehicle load aggregator in the G2B mode and the economic benefit of the power exchange type electric vehicle load aggregator in the B2G mode tothe maximum, and establishing a power exchange type electric vehicle load group scheduling objective function and a power exchange type electric vehicle load group scheduling constraint condition in the G2B mode and the B2G mode; determining an electric vehicle load classification scheduling method and charging and discharging schemes for rechargeable electric vehicle batteries; adopting a batterycharging, discharging and battery replacing scheme of the battery replacing type electric automobile; and enabling the aggregator to purchase and sell electricity from the power grid and optimizes the economic benefit of the aggregator. According to the method, the potential of the demand side is fully excavated, and certain guiding significance is achieved for large-scale electric vehicle accessto the power grid in the future.