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30results about How to "Comprehensive excellent" patented technology
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Variable tap-length RC equivalent circuit model and realization method based on AIC
ActiveCN103926538AComprehensive excellentEasy to implementElectrical testingModel complexityWorking range
The invention discloses a variable tap-length RC equivalent circuit model and a realization method based on the AIC. According to the variable tap-length RC equivalent circuit model, an RC model is selected as a basic model, complexity and accuracy of the basic model are fully weighted in different SOCs on the basis of the AIC, the optimal RC tap length of each SOC is determined, the variable tap-length RC model is realized through control over toggle switches, the dynamic and static characteristics of a power battery are accurately simulated within all the working ranges through a model structure which is as simple as possible, engineering realization is easy, accuracy is high, and comprehensive optimization between model complexity and accuracy is achieved. According to the variable tap-length RC equivalent circuit model and the realization method based on the AIC, the dynamic and static characteristics of the power battery can be well simulated, and the variable tap-length RC equivalent circuit model and the realization method are applicable to the working condition of constant-current charging and discharging, the working condition of pulse charging and discharging and the working condition of UDDS circulation of the power battery.
Owner:SHANDONG UNIV
Method for battery SOC estimation based on small model error criterion expanding Kalman filter
ActiveCN103941195AHigh precisionOvercoming the problem of filter divergenceElectrical testingBattery terminalFuzzy neural
The invention discloses a method for battery SOC estimation based on small model error criterion expanding Kalman filter. The method comprises the steps of first establishing a variable-order RC model based on an AIC criterion and laying a good foundation for SOC precise estimation; obtaining data such as battery terminal voltage, current and corresponding model errors in an off-line mode under different working conditions and establishing a model error prediction model based on a fuzzy neural network; predicting model errors in an on-line mode based on the neural network in filtering, and performing measurement and updating on state estimation only when predicted errors are small so that the problem of filtering divergence caused by the model errors and system noise statistical characteristic uncertainty and the problem of SOC estimation fluctuation caused by battery terminal voltage jump can be solved. The method can effectively eliminate filtering estimation errors caused by the model errors and can be suitable for the dynamic process of a battery under various complex working conditions.
Owner:SHANDONG UNIV
Thermal power plant environment economic dispatching method based on multi-target differential evolution algorithm
The invention discloses a thermal power plant environment economic dispatching method based on a multi-target differential evolution algorithm.The method comprises the following steps that a thermal power plant economic dispatching model with the lowest electricity generation cost and smallest pollutant discharge quantity as targets and with generator capacity and power balance as constraint conditions is built; the multi-target differential evolution algorithm is utilized for carrying out optimization solving on the model, an optimal Pareto solution set is obtained, the multi-target differential evolution algorithm adopts difference mutation operators for searching, mutation operators are selected based on the accumulation performance and using frequency of the operators of the latest several times of variation, and solution set convergence and distribution uniformity are ensured by means of non-dominated ranking, domination frequency and hypervolume contribution and the like; finally, a decision is made through the fuzzy set theory, and a compromise solution is selected from the Pareto solution set to be used as a final regulation scheme.The thermal power plant environment economic dispatching method has the advantages that precision is high, Pareto leading edge solution set distribution is uniform and convergence speed is high, and engineering realization is easy.
Owner:SOUTHWEST PETROLEUM UNIV
Effective method for solving multi-target resource-constrained project scheduling
InactiveCN104217293AComprehensive excellentFully consider resource requirementsResourcesPattern sequenceResource constraints
The invention discloses an effective method for solving multi-target resource-constrained project scheduling. The method comprises the following steps: (1) establishing a multi-target resource-constrained project scheduling mathematical model based on duration-cost optimization; (2) generating an initial feasible scheduling sequence; (3) evaluating the scheduling sequence; (4) updating the scheduling sequence; (5) configuring non-dominated disaggregation operation; (6) maintaining an external archive set; and (7) performing updating iteration till an optimal solution set is output. According to the method disclosed by the invention, each intelligent body corresponds to a linked list sequence in a scheduling problem, the scheduling sequence of a task linked list and a corresponding execution mode sequence are coded respectively, decoding operation is performed by adopting a serial method, and evolution and update are performed among the linked list sequences through competition, intersection and self-learning; and a project scheduling plan is adjusted, so that comprehensive optimal duration and cost are realized within a control period on the premise of satisfying conditions such as timing constraint and resource constraint.
Owner:XIAN UNIV OF TECH
Six-traction device space debris net capture system
The invention provides a six-traction device space debris net capture system which adopts level-1 launch and mass blocks synchronization launch and concentric circles rope net folding and receiving. The system comprises a launch subsystem which is composed of a launcher, a net hold, a cushioning device and a tether tension control device; a fly net subsystem which is composed of a rope net and mass blocks; the launcher is used for pushing the mass blocks at a predetermined distance from a target at a predetermined angle and to drive the rope net be pulled from the center of the net hold while unfolding to a fully unfolded state to capture the target after reaching the target location; the mass blocks are used for dragging the rope net so that the rope net is pulled out and unfolded and the net opening is tightened up to complete capture of the target; the number of the mass blocks is at least three and six mass blocks are adopted through optimized analysis; the tether tension control device is connected with the fly net subsystem and with the target through the rope net to pull the captured target off the track; the rope net is encapsulated in the net hold in a concentric circles package and is used to form sufficient coverage to completely surround the target.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
Peak-shaving boiler heating station heating demand optimized dispatching method using particle swarm optimization
The invention provides a peak-shaving boiler heating station heating demand optimized dispatching method using particle swarm optimization, and belongs to the technical field of heating station heating demand control. By means of the method, in order to enable energy consumption and economy of a heating system to be considered at the same time in optimized dispatching of a heating station, different dispatching modes are used in heating peak periods and non-peak periods, comprehensive optimum is enabled to be achieved, optimized dispatching calculation speed is enabled to be higher, and results are enabled to be more accurate. The method mainly comprises the steps of constructing a peak-shaving boiler heating station optimized dispatching model, and determining weight coefficients lambda 1 and lambda 2; and using a particle swarm optimization algorithm to obtain corresponding boiler heating load Qb and secondary net boiler heating channel flow rate Gb when comprehensive energy consumption Ew is the smallest under the condition that a constraint condition is satisfied, and therefore peak-shaving boiler heating station heating demand optimized dispatching is completed. According to the method, the peak-shaving boiler heating station optimized dispatching model with energy consumption and economy combined is built, therefore the optimal distribution of heating demands of different heat sources is achieved, energy consumption and economy are comprehensively optimal, and the purpose of energy conservation is achieved.
Owner:HARBIN INST OF TECH
Model prediction control method of spacecraft attitude avoidance by taking consideration of flywheel dynamic characteristics
ActiveCN108536014AImprove solution efficiencyHigh speedCosmonautic vehiclesCosmonautic partsTask demandMathematical model
A model prediction control method of spacecraft attitude avoidance by taking the consideration of flywheel dynamic characteristics comprises the following steps of: establishing a prediction model based on attitude dynamics of the spacecraft and dynamics of flywheels; establishing a constraint mathematic model according to the dynamic characteristics of the flywheels and an instrument angle of sight; designing a performance index function facing different task demands, and converting a control problem to a problem of solving an extreme value of a target function in equality and inequality constraint conditions; and finally, rapidly solving the problem based on the optimization method of real-time iteration. The method can process the attribute avoidance problem of the spacecraft in the execution mechanism constraint condition, can reach the comprehensive optimization of energy and time of the design of the target function, can perform processing through real-time iteration and hot start methods and can reduce the computing amount of solving the optimization problem.
Owner:BEIHANG UNIV
Prevention strategy for serious kinematic performance degradation of spatial manipulator
ActiveCN108638067AComprehensive excellentSolve the coupling problemProgramme-controlled manipulatorEngineeringPerformance index
An embodiment of the invention provides a prevention strategy for serious kinematic performance degradation of a spatial manipulator. The prevention strategy comprises the following steps: analyzing unilateral kinematic performance indexes, impacted by a locking angle of a fault joint, of the spatial manipulator, and selecting a plurality of indexes to represent comprehensive kinematic performanceof the spatial manipulator; through global processing of the selected local indexes, on the basis of constructing a corresponding global fluctuation index, constructing a comprehensive kinematic performance index of the spatial manipulator by an entropy evaluation method; based on the unilateral kinematic performance indexes or the comprehensive kinematic performance index, solving manual limitations of all joints of the spatial manipulator on the basis of the Newton-Raphson method; and preventing serious kinematic performance degradation of the spatial manipulator by manually limiting a rotation range of each joint of the spatial manipulator in an ordinary state. According to the technical solution provided by the embodiment of the invention, the kinematic performance of the spatial manipulator can still meet the demands of an on-orbit operation task after locking failures of the joints.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Multi-target power generation plan decomposition and coordination calculation method for direct-current trans-regional interconnected power grid
ActiveCN110929913AComprehensive excellentPrivacy protectionForecastingResourcesPower gridCalculation methods
The invention discloses a multi-target power generation plan decomposition and coordination calculation method for a direct-current trans-regional interconnected power grid. The method comprises the following steps: firstly, constructing a trans-regional interconnected large power grid centralized multi-target day-ahead power generation and transmission plan model containing direct-current operation engineering constraints by taking minimum power generation cost, minimum carbon emission and minimum pollutant emission as targets; converting the multi-objective optimization model into a series of centralized single-objective optimization sub-problems with different preferences by utilizing a normal boundary intersection method; and finally, for each single-target optimization sub-problem, constructing a sending end and receiving end power grid decomposition coordination model based on an alternating direction multiplier method, and realizing distributed solution of a multi-target day-ahead power generation and transmission plan. According to the method, distributed solving of the multi-target day-ahead power transmission plan of the direct-current trans-regional interconnected largepower grid can be realized, multiple scheduling targets can be considered, and the method is also suitable for a scheduling mode of unified scheduling and hierarchical management in China.
Owner:HOHAI UNIV +2
Heating load estimation method of residential electric heating film
InactiveCN105117596AMeet the needs of different residentsComprehensive excellentSpecial data processing applicationsHabitEngineering
The present invention relates to a heating load estimation method of a residential electric heating film. The method comprises the following steps: step 1, using heating power required by each household in a residential area as a target function to establish a heating load estimation formula of a residential electric heating film: P=SK(t-tw), wherein in the above expression, P is the required heating power, S is an equivalent total area of a heat-dissipating wall based on a certain occupancy rate, K is an equivalent heat transfer coefficient, t is a calculated indoor temperature determined based on the usage habits of each household in the residential area and tw is a calculated outdoor temperature; and step 2, determining parameter values of tw, t, S and K in step 1 and putting the parameter values into the formula in step 1 to obtain the heating load value required by each household in the residential area by solving the formula. The estimation method enables each household to configure a reasonable heating load capacity according to the specific situation of the household to achieve comprehensive optimization on economic and heating effects.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1
Control method for four-holding water tank system
InactiveCN104750127AAccurately describe the interactionComprehensive excellentLevel controlAutomatic controlDynamic models
The invention discloses a control method for a four-holding water tank system and belongs to the field of automatic control. A four-holding water tank is a typical hybrid system with constraint, and the mutation of the water tank structure and a switch of the a valve are discrete events. Continuous process and discrete events are integrated in a uniform framework through a modeling method for a mixed logic dynamic model, and the interaction between the discrete events and continuous dynamic process is described precisely; model predictive control for a four-holding hybrid system based on transverse 8 norm is designed, the field device control through MATLAB is finished through OPC communication, and the effect of a predictive control strategy in the MATLAB on an actual hybrid system is realized. The control method for the four-holding water tank system uses the modeling and control methods of hybrid system theory, and all the subsection models of the system are integrated to precisely describe the interaction between a model switch event and the continuous dynamic process; the predictive control based on the hybrid system model processes the control problem of the system with a lot of constraint conditions, and the continuous and discrete control for the system is optimal.
Owner:CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
openstack encrypted link management method and system
ActiveCN113542077BReduce difficultyComprehensive excellentSecuring communicationStationLink management
Owner:南京赛宁信息技术有限公司
Triangular comprehensive evaluation-based optimal configuration method of novel energy supply system
ActiveCN110266059AComprehensive excellentAvoiding Weighting Coefficient Setting ProblemsHeat storage plantsSingle network parallel feeding arrangementsMathematical modelNew energy
The invention provides a triangular comprehensive evaluation-based optimal configuration method of a novel energy supply system. The method comprises the following steps: firstly, selecting the load power loss rate, the load heat loss rate, the system annual cost and the energy surplus rate as evaluation indexes in three aspects of the power and heat supply stability, the economy and the new energy utilization condition of the novel energy supply system, building a triangular comprehensive evaluation model, and setting the area of the triangular comprehensive evaluation model as a target function of the optimal configuration method; then building an optimal mathematical model of the novel energy supply system according to the constraint conditions by taking the maximum area of the triangular comprehensive evaluation model as a target; and finally, using a hierarchical iteration algorithm to solve an optimal configuration scheme of the novel energy supply system, and verifying the correctness and feasibility of the optimal method through actual calculation examples. The optimal configuration scheme can meet the rigid requirements of power and heat in remote regions, and is beneficial to the economic operation of the energy supply system and the efficient utilization of renewable energy sources.
Owner:ZHEJIANG UNIV +1
Openstack encryption link management method and system
ActiveCN113542077AReduce difficultyComprehensive excellentData switching networksEngineeringReal-time computing
The invention discloses an openstack encryption link management method and system. The method comprises the following steps: firstly, layering intermediate nodes between a network node and a target site according to the number of tunnels on an encrypted link; then the node sending a request to obtain network delay between the node and all adjacent nodes, and obtaining the number of encrypted tunnels established on an intermediate node; and taking the network node as a starting point, taking the target station as an end point, integrating network delay and the number of encrypted tunnels established on the intermediate node as the distance between adjacent nodes, and selecting a connectable intermediate node which enables the distance to be minimum on the whole encrypted link as the intermediate node used by the encrypted link by applying an A star algorithm. According to the method, the encryption link composed of the intermediate nodes which are comprehensively optimal in the aspects of network delay and load balancing can be automatically selected, and the success rate and availability of establishment of the encryption link are improved.
Owner:南京赛宁信息技术有限公司
Micro-grid system capacity optimal configuration method based on fan-shaped radar map model
ActiveCN111311032AImprove power supply reliabilityComprehensive excellentSingle network parallel feeding arrangementsForecastingMicrogridNew energy
The invention discloses a micro-grid system capacity optimal configuration method based on a fan-shaped radar map model. The method comprises the following steps: firstly, selecting a load power lossrate, an annual cost, a renewable energy power generation loss rate and an energy excess rate as evaluation indexes in four aspects of microgrid system power supply stability, economy, a new energy consumption condition and an energy utilization rate, establishing a fan-shaped radar map model, and setting the area of a fan-shaped radar map as an objective function; taking the maximum area of the fan-shaped radar map as a target, obeying constraint conditions, and establishing an optimization mathematical model of micro-grid system capacity configuration; finally, a genetic algorithm based on aload tracking management strategy is adopted; solving an optimal configuration scheme of the micro-grid system capacity; the correctness and feasibility of the optimization method are verified through actual examples, the optimization configuration scheme can meet the stable operation target of the microgrid system composed of various new energy modules and energy storage devices, and economic operation of the microgrid system and efficient utilization of renewable energy sources are facilitated.
Owner:ZHEJIANG UNIV +1
Double-sided efficient heat dissipation airtight packaging structure and preparation method thereof
ActiveCN113327904AMeet electromagnetic compatibility requirementsSatisfy the airtightness of the package structureFixed microstructural devicesVolume/mass flow by thermal effectsElectrical connectionEngineering
Owner:SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
Variable order rc equivalent circuit model based on aic criterion and its realization method
ActiveCN103926538BComprehensive excellentEasy to implementElectrical testingPower batteryToggle switch
The invention discloses a variable tap-length RC equivalent circuit model and a realization method based on the AIC. According to the variable tap-length RC equivalent circuit model, an RC model is selected as a basic model, complexity and accuracy of the basic model are fully weighted in different SOCs on the basis of the AIC, the optimal RC tap length of each SOC is determined, the variable tap-length RC model is realized through control over toggle switches, the dynamic and static characteristics of a power battery are accurately simulated within all the working ranges through a model structure which is as simple as possible, engineering realization is easy, accuracy is high, and comprehensive optimization between model complexity and accuracy is achieved. According to the variable tap-length RC equivalent circuit model and the realization method based on the AIC, the dynamic and static characteristics of the power battery can be well simulated, and the variable tap-length RC equivalent circuit model and the realization method are applicable to the working condition of constant-current charging and discharging, the working condition of pulse charging and discharging and the working condition of UDDS circulation of the power battery.
Owner:SHANDONG UNIV
Six traction device space debris net capture system
The present invention proposes a space debris net capture system with six traction devices, which adopts the method of first-stage launch and mass block synchronous launch, and the concentric circle rope net is folded and stored, including: launch subsystem, consisting of a launcher, a net cabin, and a buffer device It is composed of a tether tension control device; the flying net subsystem is composed of a rope net and a mass block, wherein the transmitter is used to push the mass block to move according to the preset launch angle when approaching the predetermined distance of the target and drive the rope net from the net cabin. Pull out while unfolding and reach the fully unfolded state, so as to net the target after reaching the target position. The quality block is used to pull the rope net out and tighten the net mouth to complete the target capture. The number of mass blocks is at least three and passed through The optimization analysis uses six mass blocks, the tether tension control device is connected to the flying net subsystem and the target is connected to the target through the rope net to pull the captured target off the track. The rope net is encapsulated in the net cabin in a concentric circle packaging method And used to create enough coverage space to completely surround the target.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
A new energy supply system optimal configuration method based on triangular comprehensive evaluation
ActiveCN110266059BComprehensive excellentAvoiding Weighting Coefficient Setting ProblemsHeat storage plantsSingle network parallel feeding arrangementsMathematical modelNew energy
The present invention provides a new energy supply system optimization configuration method based on triangular comprehensive evaluation, which firstly selects the load loss rate, load heat loss rate, system annualized cost and energy surplus rate as the new energy supply system electric heat supply stability, The evaluation index of the three aspects of economy and new energy utilization, establish a triangular comprehensive evaluation model, and set the area of the triangular comprehensive evaluation model as the objective function of the optimal allocation method; then take the largest area of the triangular comprehensive evaluation model as the goal, obey the constraints Conditions, establish an optimized mathematical model of the new energy supply system; finally, use a layered iterative algorithm to solve the optimal configuration scheme of the new energy supply system, and verify the correctness and feasibility of the optimization method through practical examples, and optimize the configuration The scheme can meet the rigid demand for electricity and heat in remote areas, and is conducive to the economic operation of the energy supply system itself and the efficient use of renewable energy.
Owner:ZHEJIANG UNIV +1
Battery SOC Estimation Method Based on Extended Kalman Filter with Small Model Error Criterion
ActiveCN103941195BHigh precisionOvercoming the problem of filter divergenceElectrical testingEstimation methodsEngineering
The invention discloses a method for battery SOC estimation based on small model error criterion expanding Kalman filter. The method comprises the steps of first establishing a variable-order RC model based on an AIC criterion and laying a good foundation for SOC precise estimation; obtaining data such as battery terminal voltage, current and corresponding model errors in an off-line mode under different working conditions and establishing a model error prediction model based on a fuzzy neural network; predicting model errors in an on-line mode based on the neural network in filtering, and performing measurement and updating on state estimation only when predicted errors are small so that the problem of filtering divergence caused by the model errors and system noise statistical characteristic uncertainty and the problem of SOC estimation fluctuation caused by battery terminal voltage jump can be solved. The method can effectively eliminate filtering estimation errors caused by the model errors and can be suitable for the dynamic process of a battery under various complex working conditions.
Owner:SHANDONG UNIV
A Method for Environmental Economic Dispatch of Thermal Power Plant Based on Multi-objective Differential Evolution Algorithm
Owner:SOUTHWEST PETROLEUM UNIV
A Prevention Strategy for Severe Degradation of Kinematic Performance of Space Manipulator
ActiveCN108638067BComprehensive excellentSolve the coupling problemProgramme-controlled manipulatorClassical mechanicsPerformance index
An embodiment of the invention provides a prevention strategy for serious kinematic performance degradation of a spatial manipulator. The prevention strategy comprises the following steps: analyzing unilateral kinematic performance indexes, impacted by a locking angle of a fault joint, of the spatial manipulator, and selecting a plurality of indexes to represent comprehensive kinematic performanceof the spatial manipulator; through global processing of the selected local indexes, on the basis of constructing a corresponding global fluctuation index, constructing a comprehensive kinematic performance index of the spatial manipulator by an entropy evaluation method; based on the unilateral kinematic performance indexes or the comprehensive kinematic performance index, solving manual limitations of all joints of the spatial manipulator on the basis of the Newton-Raphson method; and preventing serious kinematic performance degradation of the spatial manipulator by manually limiting a rotation range of each joint of the spatial manipulator in an ordinary state. According to the technical solution provided by the embodiment of the invention, the kinematic performance of the spatial manipulator can still meet the demands of an on-orbit operation task after locking failures of the joints.
Owner:BEIJING UNIV OF POSTS & TELECOMM
A frequency management method for hypersonic vehicle attitude stabilization
Owner:BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1
Three-dimensional integrated high-efficiency heat dissipation packaging structure and preparation method thereof
ActiveCN113299618AEfficient heat dissipationEfficient Density CoolingSemiconductor/solid-state device detailsSolid-state devicesEngineeringMicrowave signals
The invention relates to the technical field of microelectronic heat dissipation, and particularly discloses a three-dimensional integrated efficient heat dissipation packaging structure and a preparation method thereof. The packaging structure comprises a first packaging substrate, a second packaging substrate, a heat dissipation micro-channel, a first chip, a second chip, a cover plate, an enclosure frame, a liquid cooling connector and an electric connector; the heat dissipation micro-channel and the enclosure frame are welded on the first packaging substrate; the first chip is welded on the heat dissipation micro-channel and is interconnected with a surface bonding pad of the first packaging substrate; the second chip is welded on the second packaging substrate and is interconnected with a surface bonding pad of the second packaging substrate; the cover plate is welded on the enclosure frame for sealing; and the liquid cooling connector and the electric connector are welded between the first packaging substrate and the second packaging substrate, and the liquid cooling connector and the electric connector are also welded on the second packaging substrate. According to the invention, the electromagnetic compatibility requirement of microwave signals can be met while high-heat-flux heat dissipation is realized.
Owner:SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
Terminal status monitoring method for power grid big data distributed system
ActiveCN107809348BAvoid Cyber Security IncidentsImprove the level of safe and stable operationData switching networksPower gridMonitoring system
The invention belongs to the research and application technical field of status monitoring and fault diagnosis of power transformer equipment in the electric power industry, and in particular relates to a terminal status monitoring method for large data distributed systems of power grids. The invention obtains the current connected power transmission and transformation equipment through the power monitoring system The status monitoring master station platform monitors information such as the IP, MAC address, and communication port of the terminal host, and detects whether the characteristics of the monitored terminal host match the established rule base, and can also provide network security, data link and data channel availability checks service, the present invention can effectively avoid network security incidents that attack the power monitoring system through distributed monitoring terminal hosts, and improve the safe and stable operation level of the system; it creatively realizes the monitoring of terminal host status based on IP address, MAC address, and communication port. The simple method overcomes the passive situation of manual inspection and monitoring of terminal hosts with cumbersome procedures, and has a large-scale engineering application value.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
A method for decomposing and coordinating calculation of multi-objective power generation plan in DC interregional interconnection grid
ActiveCN110929913BComprehensive excellentPrivacy protectionForecastingResourcesPower gridComputer science
The invention discloses a multi-objective power generation plan decomposition and coordination calculation method for a DC cross-region interconnected power grid. First, a cross-region interconnected large power grid with engineering constraints of DC operation is constructed with the minimum power generation cost, minimum carbon emission and minimum pollutant emission as the goals. Then, the above multi-objective optimization model is transformed into a series of centralized single-objective optimization sub-problems with different preferences by using the normal boundary intersection method; The power grid decomposition coordination model of the sending end and the receiving end of the multiplier method realizes the distributed solution of the multi-objective day-ahead generation and transmission plan. The method can realize the distributed solution of the multi-objective day-ahead generation and transmission plan of the DC cross-regional interconnected large power grid, which can not only take into account multiple dispatching objectives, but also be suitable for the dispatching mode of unified dispatching and hierarchical management in my country.
Owner:HOHAI UNIV +2
A Model Predictive Control Method for Spacecraft Attitude Avoidance Considering Flywheel Dynamic Characteristics
ActiveCN108536014BImprove solution efficiencyHigh speedCosmonautic vehiclesCosmonautic partsControl engineeringPerformance index
A model prediction control method of spacecraft attitude avoidance by taking the consideration of flywheel dynamic characteristics comprises the following steps of: establishing a prediction model based on attitude dynamics of the spacecraft and dynamics of flywheels; establishing a constraint mathematic model according to the dynamic characteristics of the flywheels and an instrument angle of sight; designing a performance index function facing different task demands, and converting a control problem to a problem of solving an extreme value of a target function in equality and inequality constraint conditions; and finally, rapidly solving the problem based on the optimization method of real-time iteration. The method can process the attribute avoidance problem of the spacecraft in the execution mechanism constraint condition, can reach the comprehensive optimization of energy and time of the design of the target function, can perform processing through real-time iteration and hot start methods and can reduce the computing amount of solving the optimization problem.
Owner:BEIHANG UNIV
A Method for Optimal Configuration of Microgrid System Capacity Based on Sector Radar Model
ActiveCN111311032BImprove power supply reliabilityComprehensive excellentSingle network parallel feeding arrangementsForecastingMicrogridSystem capacity
The invention discloses a microgrid system capacity optimization configuration method based on a fan-shaped radar graph model. Firstly, the load loss rate, annualized cost, renewable energy generation loss rate and energy surplus rate are respectively selected as the power supply stability of the microgrid system. , economy, new energy consumption, and energy utilization, establish a fan-shaped radar map model, and set the area of the fan-shaped radar map as the objective function; then take the maximum area of the fan-shaped radar map as the goal and obey the constraints Conditions, establish an optimized mathematical model for the capacity allocation of the microgrid system; finally, use the genetic algorithm based on the load tracking management strategy to solve the optimal allocation scheme for the capacity of the microgrid system, and verify the correctness and reliability of the optimization method through practical examples. Feasibility, the optimized configuration scheme can meet the stable operation target of the micro-grid system composed of various new energy modules and energy storage devices, and is conducive to the economic operation of the micro-grid system itself and the efficient utilization of renewable energy.
Owner:ZHEJIANG UNIV +1
A Cluster Analysis Method for Transformer Condition Monitoring Data
ActiveCN107677903BThe Key Difficulties of Overcoming Latent FaultsImprove security and stabilityElectrical testingCharacter and pattern recognitionTransformerPower equipment
The present invention relates to the technical field of state monitoring and fault diagnosis of power equipment, in particular to a method for cluster analysis of transformer state monitoring data; The analysis method of dissolved gas in oil with the same load rate) overcomes the key problem of troubleshooting latent faults of equipment and improves the security and stability of the power grid; successfully developed an inspection system covering data extraction, cleaning and fusion of dissolved gas in oil, and cluster analysis , effectively avoiding the passive situation of frequent transformer status monitoring false alarms and missing alarms, and achieving the comprehensive optimization of risk, efficiency and cost in one fell swoop.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
A routing method and system for three-dimensional reconstruction and expansion of expressways based on restrictive factors
ActiveCN108763775BLow costThe demolition area is smallGeometric CADSpecial data processing applicationsDesign planMechanical engineering
The present invention relates to a method and system for three-dimensional reconstruction and expansion of highways based on limiting factors. The limiting factors are taken as important control factors in route design, and the design process of the three-dimensional reconstruction and expansion mode is refined, and designers A variety of horizontal, vertical and horizontal schemes can be obtained according to the established design steps, and then a variety of comprehensive and better design schemes can be screened out according to the design principles of the horizontal, vertical and horizontal schemes and the relevant provisions of the design specifications. The design idea of this alignment method is clear, and the requirements for the design experience of the designer are relatively low. During the design process, no comprehensive and better design scheme will be missed. The scheme obtained after multiple screenings tends to be close to the best scheme of the project. , which is conducive to the design of a comprehensive horizontal and vertical horizontal scheme with low engineering cost, small demolition area, and small construction impact.
Owner:SOUTHEAST UNIV
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