102results about How to "Improve the level of refinement" patented technology

The invention discloses an integrative specialized weather service integrated system which comprises a data acquisition and sharing unit, a product processing unit, a product release and display unit and a service management unit, and integrates weather data acquisition, specialized weather service product manufacturing, processing and release, specialized weather service monitoring and management, and other links. The integrated system remarkably improves the specialized weather service level, facilitates expanding service field, increases service items, improves pertinence and fine level of the service product, and meets the requirements of various users to the maximum extent.

The invention discloses a sensitivity factor based calculating method for power grid node marginal pricing. The method is performed through the following steps: determining the calculating period for node marginal pricing, obtaining the sensitivity factors of a power grid, building a power market clearing optimal model based on the sensitivity factors, adopting a linear programming method to solve the model, calculating the shadow price under constrained conditions and finally generating the clearing result of the power grid node marginal pricing. According to the invention, high calculating efficiency can be achieved. The method is suitable for addressing the market clearing problems in a large-scale power grid.

The invention discloses a day-ahead power generation plan photovoltaic power generation receiving capability analysis method based on SCED. The day-ahead power generation plan photovoltaic power generation receiving capability analysis method based on SCED includes the following steps that based on a physical model and an economic model which access a power grid, under the condition that a regular unit booting and shutting scheme is known, an SCED model is set up; photovoltaic power stations in a zone serve as a specific analysis target, an optimized target of the SCED model is set to be maximum photovoltaic power generation total output power and an optimized model of photovoltaic power generation receiving capability analysis is obtained; non-linear factors in the model undergo linearization; the linear programming method is used for solving the model to calculate out an active power curve of receiving photovoltaic generation of a study area, the photovoltaic generation receiving capability of the power grid is obtained and the maximum grid connection power generating capability in an analysis period of all photovoltaic power stations is obtained. The day-ahead power generation plan photovoltaic power generation receiving capability analysis method based on SCED facilitates pre-control on risks generated after the power grid accesses large-scale photovoltaic power generation and improves safety of operation of the power grid.

The invention discloses a cross intersection traffic signal lamp arrangement judgment method which successively comprises the steps of establishing a cross intersection traffic characteristic data set without traffic signal control, numbering of each entrance direction of the intersection, intersection equivalent traffic flow characteristic parameter calculation, establishing and calibrating a cross intersection passenger total delay model without traffic signal control, determination of a cross intersection signal timing scheme, establishing and calibrating the intersection passenger total delay model under the signal timing scheme, establishing a main-branch equivalent traffic flow calculation model, determining a main-branch equivalent traffic flow threshold diagram and judging arrangement of the traffic signal lamp at the intersection. Compared with the conventional subjective judgment method, the judgment method is relatively objective and accurate and has high operability so that the fine level of urban road traffic management and control can be further enhanced, and the beneficial reference can be provided for scientific decision of the urban traffic manager.

The invention relates to a power/electric-quantity balance index calculation method based on time-sequence running simulation. The method includes the steps of: power balance indexes and calculation,wherein monthly profit/loss control time periods and peak regulation control time periods are obtained by monthly running simulation data, then the profit/loss and peak regulation control time periodsare utilized to calculate the 11 types of monthly power balance indexes, the 11 types of monthly power balance indexes include system requirement capacity, system machine installation, nuclear powerutilization, energy storage utilization, hydropower utilization, thermal power utilization, peak regulation utilization, wind/light utilization, peak regulation insufficiency and other power indicators; and electric-quantity balance indexes and calculation, wherein fully-yearly and monthly total load demand, generated electric-quantity of various units, wind/light consumption quantity and utilization hour numbers of the various units are respectively calculated by results of running simulation of 8760 points, electric-quantity balance situations of a planning scheme are evaluated according tothe obtained indexes, and the electric-quantity balance indexes include system requirement electric-quantity, nuclear power generation, energy storage balance, hydropower availability, peak regulationgeneration, thermal power generation, wind/light availability and utilization hours.

The invention relates to a method for rapidly generating and solving a model in power system operating simulation under security constraints, and belongs to the field of power system analysis. The method comprises the following steps: obtaining all information relating to all branches and nodes within an operating simulation time range, and calculating an original node impedance matrix, a load transfer distribution factor original matrix and a generator transfer distribution factor original matrix, considering all branches, of a power system; correcting the original node impedance matrix, the load transfer distribution factor original matrix and the generator transfer distribution factor original matrix according to daily power system branch states; solving outputs of various generators in various time periods according to a power system unit combination optimization model free of the security constraints, and judging whether one branch is in an overload or not again; and carrying out multiple iterations until no branch is in a flow overload, obtaining the outputs of the generators of considering the security constraints in the time periods, and finishing annual operating simulation results of considering the security constraints. According to the method, the power system operating simulation speed of considering the security constraints can be improved; large-scale operating simulation, considering the security constraints, of the power system is facilitated; and improvement of the refinement level of power system planning is facilitated.

The invention discloses a method for determining a high-speed wind tunnel large aircraft model scale and aims at solving the problems that an existing method for determining a large aircraft model scale is high in difficulty, high in costs and inaccurate. The method comprises the following steps of step 1, generating testing computational grids of different model elongations according to numerical simulation of a model; step 2, setting boundary conditions according to testing operating conditions; step 3, performing numerical simulation of testing conditions by utilizing a CFD (computational fluid dynamics ) calculation procedure and obtaining pressure distribution data of side walls; step 4, comparing the pressure distribution date with pressure distribution data of side walls of an empty wind tunnel, performing statistic analysis on the data and substituting the data into judgment criteria, determining the scale of the full elongation of the model and the width of a testing section to further obtain a proper model scale. The method for the high-speed wind tunnel large aircraft model scale determines the high-speed wind tunnel large aircraft model scale according to disturbance pressure distribution of the side walls of panels of the testing section and provides the basis for the formulation of a testing scheme and the design of a model.

The invention discloses a strength check method for an asphalt pavement. The method comprises the step of carrying out planar isobaric/axial compression, planar isobaric/axial tension, planar tension-compression, planar compression/axial compression, planar tension-compression/axial compression, planar tension-compression/axial tension and planar anisobaric/axial compression tests on the basis of a three-axis test system and a three-axis test method for an asphalt mixture to obtain a multi-axis strength test result for the asphalt mixture. According to the new method for carrying out strength check on an asphalt pavement according to an asphalt mixture breakage criterion in a complex stress state, the problem that the existing one-dimensional strength theory is incapable of objectively reflecting the breakage characteristics and the resistance of a pavement structure is solved, and the refinement level of an asphalt pavement design is improved.

Provided is a classification method for areas with power supplied by a power distribution network. The method is comprehensive, systematic and quantitative. The method includes the following steps of data collection, design objective grading function, design objective weight, comprehensive grading, and classification selection. The method includes a power supply area evaluation objective system covering two aspects of area developing levels and power utilization developing levels and the design objective grading function and weight, a classification comprehensive evaluation model for the areas with the power supplied by the power distribution network is built, and the method is comprehensive, systematic and quantitative on the basis of the model.

The invention provides a high-efficiency continuous machine tea refining automation production line. The production line comprises a fresh leaf conveying mechanism, an enzymes deactivating machine, anenzyme-denatured leaf conveying mechanism, a cooling and moisture-regain mechanism, a rolling machine leaf conveying mechanism, a four-machine linkage type mechanism, a dryer feeding conveying mechanism, a drying mechanism, a frying machine feeding conveying mechanism, a frying mechanism, an winnower feeding conveying mechanism, a wind-selection mechanism, a production line distribution controlsystem based on a programmable logic controller, a data acquisition and monitoring system, a process parameter expert decision-making system, and a process parameter precision control system. The production line implements a parameter automatic configuration scheme of a field bus technology and an expert decision-making library for the whole processing production line as a whole, the parameters ofeach link of the whole production process of tea can be automatically configured from the whole, and the equipment can be continuously controlled as a whole, the production line can improve the standardization, automation and refinement levels of tea processing, and effectively improves the quality of machined tea products.

The invention relates to a hydropower station short-term fine scheduling method, and belongs to the technical field of power generation scheduling of power systems. According to the method, the minimum peak-valley difference of the residual load of a power grid is taken as a target, the influence of reservoir operation constraints, unit operation constraints, power constraints and head changes onthe power generation and water pumping characteristics of the pumped storage hydroelectric generating unit is comprehensively considered, and the purpose of improving the fine level of dispatching isachieved. For nonlinear factors such as a nonlinear multi-objective function, a unit power generation and hydropower constraint, a water turbine dynamic characteristic constraint, a water pump dynamiccharacteristic constraint and a unit operation state constraint in a scheduling model. A corresponding linearization processing strategy is provided, an original model is converted into a standard mixed integer linear programming model, and then the model is solved. The method gives full play to the peak shaving effect of the pumped storage hydropower station in the power grid, improves the refinement level of power grid dispatching, and guarantees the safe and stable operation of the power station.

The invention discloses a power support capacity distribution method of different DC lines in a multi-DC system, and belongs to the technical field of an electric power system and automation thereof. The method comprises: calculating the contribution of the different DC lines in improving transient power angle stability, the DC line maximum voltage controllable amount satisfying voltage safety constraints, and a support capacity integrated contribution index of each DC line, then determining a power support capacity distribution mode, and performing power support capacity distribution on each DC line. The method provided by the invention can be used for solving the problems of priority order determination and support capacity distribution of DC emergent power support of a multi-DC system, is helpful in fully utilizing the controllability characteristic of the DC system, improves transient stability of the system, prevents motor tripping or reduces motor tripping, and improves operation economic benefits and safety of an electric power system.

The invention discloses a multi-stage wind power accepted range calculating method based on unit combination and economic dispatching, comprising an annual planning stage, a monthly planning stage, and a current planning stage. A, in the annual planning stage, a mathematical model for solving the maximum wind power installed capacity which can be accepted by a region and the minimum wind power installed capacity which must be accessed to the region is established by using regional typical load curve data and based on an economic dispatching optimization method; B, in the monthly planning stage, a mathematical model for solving the maximum wind power which can be accepted by the region and the minimum wind power which must be accessed to the region is established by using monthly load prediction data and based on the economic dispatching optimization method; and C, in the current planning stage, a mathematical model for solving the maximum wind power which can be accepted by the region next day and the minimum wind power which must be accessed to the region next day is established by using recent load prediction data, recent wind power prediction data and a monthly thermal power unit start-stop optimization result and based on the economic dispatching optimization method.

The invention discloses a step-by-step optimization method for medium and long term electric quantity safety correction. The method comprises the following steps of collecting information required bymedium and long term electric quantity safety correction; based on the collected information, establishing a power flow checking optimization model for medium and long term electric quantity safety correction by taking the minimum power flow out-of-limit amount of the power transmission section as an objective function; calculating a power flow checking optimization model, and judging whether theelectric quantity plan meets power grid safe operation requirements or not according to a power flow checking optimization result; and in response to the condition that the electric quantity plan doesnot meet the safe operation requirement of the power grid, establishing an electric quantity plan optimization model for medium-and-long-term electric quantity safety correction by taking the minimumadjustment of the starting and stopping states of all generator sets as an objective function, and correcting the electric quantity plan. Compared with traditional experience correction, the method greatly improves the refinement level of power grid dispatching, and provides technical support for increasingly complex trans-provincial and intra-provincial dispatching plan compilation.

The embodiment of the invention provides a model and flow mounting method and device, and relates to the technical field of engineering management. The method comprises the steps of displaying an initial interface, wherein the initial interface comprises a BIM model, when a binding instruction triggered when a user clicks a component to which a preset flow needs to be added on the BIM model is detected, displaying a construction set name input interface, wherein the construction set name input interface comprises a textbox; after construction set name information corresponding to the componentinput by the user into the textbox is obtained, displaying a flow selection interface, wherein the flow selection interface comprises at least one preset flow; then, when it is detected that the userclicks a target flow in at least one preset flow, displaying an information input interface corresponding to the target flow, obtaining target information input by the user in the information input interface, and generating target flow information bound to the BIM model so as to achieve the purpose of binding the BIM model to the target flow. The searching time is shortened, and the refined leveland management efficiency of project management are improved.

The invention discloses a method and device for a wind turbine generators participating in power grid emergency control. The emergency control system comprises a plurality of wind turbine generators and an energy storage system. The emergency control method comprises steps that the control measure quantity of the emergency control system is determined according to the different fault information;the control measure quantity is distributed to each wind turbine generator to obtain the measure quantity corresponding to each wind turbine generator; the adjustment quantity of an energy storage system is determined according to the execution condition of each wind turbine generator on the measure quantity. The device and the method are advantaged in that the active and reactive power rapid adjustable capabilities of a wind turbine generator inverter are utilized, the wind turbine generators are incorporated into the power grid emergency control system, and the power grid emergency control resources can be improved.

The invention discloses a neighboring grid power transmission line icing prediction method based on an altitude factor. The method comprises the steps of setting a numerical mode grid, calculating the grid point altitude, determining neighboring grid parameters, ordering the altitude, predicting grid point icing, calculating the altitude of 0 DEG C and predicting icing of prediction points. The neighboring grid power transmission line icing prediction method based on the altitude factor has the advantages of being capable of predicting the icing situation of micro terrain areas, high in applicability, high in prediction accuracy and high in prediction efficiency.

The invention discloses an urban garden patrol management and maintenance system capable of realizing field operation data through a mobile phone, and belongs to the technical field of landscaping management. The system comprises a mobile phone APP terminal, and the output end of the mobile phone APP terminal is electrically connected with the input end of a personnel login module. According to the urban garden patrol management and maintenance system capable of realizing field operation data through the mobile phone APP,a garden event data collection unit, a data information integration management unit, a PC management terminal and a feedback module are arranged, so that the construction of a more complete landscaping event disposal process is facilitated; on the basis, the acquired various data information is subjected to service comprehensive analysis; management personnel are helped to accurately grasp the on-duty condition, the real-time position and the motion trail of departmentpersonnel, meanwhile, a flexible data statistical analysis function is provided, the problems that field personnel are difficult to supervise in the working process, extensive in management, inconvenient to check attendance and the like are solved, and the scientific and refined level of personnel management is improved.

The invention relates to the technical field of engineering management, in particular to an engineering management system based on WBS modeling, and the system comprises: a three-dimensional model module which is used for building a BIM three-dimensional model of construction engineering, the BIM three-dimensional model is composed of a plurality of engineering components, and each engineering component builds a WBS structure tree task of engineering quantity; the encoding module that is used for encoding the engineering component; the management platform that is used for managing the construction progress of the engineering component and managing the engineering component according to the encoding module; and the information platform that uses the notification of the planned constructionprogress of the engineering component and the filling of the actual construction progress. According to the engineering management system based on WBS modeling, visual management is carried out on theconstruction plan, the construction progress is convenient to monitor, and it is guaranteed that an engineering project is completed according to quality and quantity.

The invention discloses a new energy centralized frequency correction control system and control method. The method comprises the steps of: obtaining fixed value information preset by an execution station, new energy grid-connected information, power grid operation information and actual response control quantity information; formulating a power grid frequency correction control measure accordingto the information and the acquired total load information of the power grid; and issuing the power grid frequency correction control measures to an execution station, and controlling the new energy inverter to adjust the power by the execution station. According to the invention, the rapid active power regulation capability of the new energy inverters is utilized, the frequency distribution characteristics of the power grid after serious faults and the difference control strategy of the new energy centralized frequency correction control for each new energy inverter are considered, and the refinement and reliability levels of the power grid frequency correction control are improved.

The invention provides a single-base-tower-based intelligent prediction method for the construction cost of a power transmission line. The method comprises. The method comprises the following steps:.The method comprises the following steps: constructing an empirical parameter prediction model in combination with empirical parameters of a least square support vector machine model; optimizing parameters in the prediction model by using a particle swarm optimization algorithm to obtain a particle swarm optimization least square support vector machine prediction model; and taking the original data as an input variable, inputting the original data into the optimized vector machine prediction model, and training the vector machine prediction model to obtain a cost prediction value of the singlebase tower. According to the method provided by the invention, dimension reduction processing is carried out on indexes by utilizing a principal component analysis method; a particle swarm algorithmis innovatively introduced to perform parameter optimization on a least square support vector machine model to obtain optimal parameters, and the obtained principal component data is imported into anempirical parameter prediction model and an optimized parameter prediction model for training and prediction, so that the accuracy of cost prediction can be improved, and the refinement level of costmanagement is improved.

The invention discloses a step-by-step optimization method for real-time generation scheduling closed-loop control. The method includes the steps of acquiring various optimization data and determining an optimization space for real-time generation scheduling closed-loop control; respectively building an active power optimization model and a control mode optimization model for real-time generation scheduling closed-loop control; when unit adjusting capacity in a system is insufficient, enabling an active power optimization module to adjust unit output scheduling so as to achieve optimization and transfer of adjustable capacity; if the unit adjusting capacity still cannot satisfy requirements, enabling a control mode optimization module to adjust a control mode of a unit so as to supplement the adjustable capacity level of the system; after step-by-step optimization, obtaining a reasonable real-time generation scheduling closed-loop control result finally. The step-by-step optimization method has the advantages that more reasonable invoking of control resources by a power grid is benefited, and the power grid scheduling fining level is improved.