152 results about "Economic analysis" patented technology

The invention provides a protective method for removing an arch bridge, which belongs to the technology field of bridge removal. The method aims to provide a protective bridge removal method with safety, high efficiency and no pollution. The technical points include: building up a new trestle, erecting a gantry crane, carrying out the bridge removal in a reverse order of the bridge building including bridge decking, coping, column, beam, arch rib and arch support in sequence. The removal stage of the arch rib especially includes removing by adopting methods of top-supporting under the arch, arch box transverse stop and horizontal restraining rope, which better solves the difficult problem of the protective bridge removal with safety, high efficiency and no pollution in a complex construction environment of guaranteeing under-arch navigation, high security level, short construction period and various unpredictable elements, manages to meet the design requirements of the removal safety factor in the protective bridge removal process and the limit control under various removal working conditions and guarantees the removal quality and the construction safety. The removal method has low cost and remarkable social benefit reflected in the direct economic analysis, which is a protective removal method of large-span bridges with safety, high efficiency and practicability.

The present invention is applicable in the field of corporate finance, corporate capital investments, economics, math, risk analysis, simulation, decision analysis, and business statistics, and relates to the modeling and valuation of investment decisions under uncertainty and risk within all companies, allowing these firms to properly identify, assess, quantify, value, diversify, and hedge their corporate capital investment decisions and their associated risks

A method and a computer program for economic evaluation of completion methods for drilling a well. An extensive user interface is provided for inputting of reservoir data and parameters relating to a first completion method. A rigorous first skin factor is generated based on the reservoir data and first drilling parameters. An interface is preferably provided for entering cost data related to the first completion technique and a first total cost can be generated. Production data is optionally generated from the first skin factor. The production and cost data can then be combined to generate an economic analysis of the first completion technique. The process can be repeated for alternate completion techniques. Preferably, ranges can be entered for certain reservoir and/or cost variables. Multiple iterations can be performed on the ranges resulting in total cost and production ranges which can be combined to yield ranges of economic data for statistical analysis. This results in a user being able to choose the most advantageous completion method.

A method for creating a linear programming (LP) model of an industrial process facility is disclosed. The model may be used for interactively simulating and/or optimizing the operation of the facility to facilitate feedstock selection and/or other economic analyses. According to the inventive method, a first principles reference tool is used to create a non-linear reference model of the entire facility. Then, independent input variables and key output variables are specified, and initial values for the independent input variables are specified. Base case values for each key output variable are determined by running the non-linear reference model using the specified initial values for the independent input variables. Next, partial derivatives for each key output variable with respect to each independent input variable are determined. A matrix is constructed containing the base case values and partial derivatives. The matrix serves as the depiction of the industrial process facility in the final LP, which may also include prices, availabilities, and other external constraints.

The invention discloses a distributed power source optimizing configuration method based on user-side economic indexes and relates to the technical field of distributed power generation in electric systems. The method includes the steps that firstly, an optimization problem mathematical model is established with the minimum user cost as a target and in combination with operation constraint conditions of all units, and then benefits and costs of a user side and a power grid side are obtained; then, capacities and power of all distributed power sources are changed and then are led into the optimization model to be calculated, corresponding benefits and costs are obtained, and the benefits and costs are used as inputs and outputs to train a neural network, and therefore the optimum distributed power source capacity and power can be obtained. The method has the advantages that economic analysis and estimation methods for a distributed power source grid-connected system based on the user-side economic indexes are provided, and the optimum configuration from which users can obtain the greatest benefits is obtained; based on the method, economic estimation is also performed on a power supply side, and the optimizing problem of the system is simplified to be a linear programming problem; accordingly, computation is simplified, a relatively comprehensive and systematic economic analysis method is provided, so the method has engineering promotional value.

The invention discloses a household average distribution transform capacity configuration method based on user behaviors, comprising the steps of: S1, calculating resident loads to obtain a calculated load Pjs; S2, calculating a distribution transformer load rate beta, and based on the calculated load Pjs obtained in step S1, calculating a distribution transformer capacity S and a distribution economic operation range; S3, determining a user number n; S4, calculating a household average distribution transform capacity Sav based on S1,S2 and S3; and S5, performing economic analysis on the distribution transformer capacity. The method can guarantee power grid safe operation, reduce power grid loss, improve power supply reliability and electric energy quality, effectively reduce distribution transform requirements and construction investment, improve the use ratio of electric power company manpower and material resources, achieve the purposes of saving electricity and reducing power grid operation costs, and allow a power distribution network to satisfy maximum electricity demands of social economy development and living standard improvement.

A modeling framework performs an economic analysis of a battery storage system to determine the economic feasibility with different business opportunities. The installed battery system can be utilized to optimize the energy flow between the wind farm and the utility. Several factors can be considered when performing the analysis, the most important being, how to determine the best optimal time to charge and discharge the battery to maximize economic benefit.

The invention discloses a dust-accumulation power-generation-amount loss prediction-based auxiliary decision-making method of photovoltaic-plant cleaning time. The method comprises the following steps: 1) predicting a number N of days before a precipitation day with a significant cleaning effect; 2) estimating a dust-accumulation loss rate, in a case where a photovoltaic plant is not cleaned in the N days, and a dust-accumulation loss rate of the photovoltaic plant in the N days after cleaning of the next day; and 3) respectively calculating profit before and after cleaning according to estimation results, carrying out cleaning if the profit is greater than a cleaning cost, and not carrying out cleaning if the profit after cleaning is less than the cleaning cost. According to the method, aprediction method is applied to dust-accumulation power-generation-amount loss estimation of the photovoltaic plant, thus comparative analysis of whether cleaning economy exists is carried out, a technical method and an economic analysis method are fused, result accuracy thereof is higher, and economic benefits of the photovoltaic plant can be effectively increased.

A method for evaluate that comprehensive performance of a supercritical carbon dioxide cycle power generation system of a small lead-based reactor. Firstly, the basic operating parameters of the supercritical carbon dioxide (S-CO 2) cycle power generation system for lead-based reactor are determined. Subsequently, the modular design method is used to establish the sub-modules of turbomachinery work, heat transfer, heat exchanger pressure drop calculation, heat exchanger efficiency calculation, thermal analysis and economic analysis of power generation system. Then, the iterative calculation method is used to solve the heat exchanger pressure drop calculation and the thermodynamic analysis sub-module of the power generation system, and the thermal parameters of the power generation system and the unit power cost are obtained. Finally, based on multi-objective collaborative optimization, the thermal performance of power generation system is evaluated. Economy. This method can effectivelycomplete the new type of small-sized lead-based reactor S_Sco2 Design of Cycle Power Generation System, Thermodynamic, Heat Transfer and Economic Analysis Models for CO2 Cycle Power Generation Systems, Efficient System Heat Transfer-Economic performance analysis, solve the problem of automatic system design, complete the comprehensive performance comparison and guide the optimal S-CO2 Cycle PatternScreening.

The invention relates to an online power station main steam flow calculation method based on flow correction. According to the method, an online main steam flow calculation model is corrected through a mass flow balance equation, the model finishes flow calibration on the basis of condensate water flow measured by a spray nozzle, under the different load working conditions, iteration method verifying calculation is utilized to obtain the main steam flow value, the Friuli Greig formula is corrected through the verified main steam flow measuring value, and finally an online main steam flow calculation model is built and obtained. By means of the method, the change tendency of the main steam flow can be reflected quickly, and meanwhile the high accuracy of the flow can be guaranteed. Considering the situation that sensor drift distortion occurs in a field adjusting level pressure measuring point, whether the adjusting level pressure value is distorted or not is judged according to the association coefficient, accordingly an adjusting level pressure soft measurement replacement solution is proposed, and the stability of an online main steam flow calculation module is guaranteed. The online main steam flow calculation strategy can be referred to by a power station and be used for conducting economic analysis.

The present invention discloses a fossil power generation unit coal blending scheme acquisition method. According to the method, a coal blending ratio is used as a target function; coal blending parameters obtained by calculating mixed coal coal quality parameters and calculating boiler checking heat are used as input quantities; safety and environmental friendliness of unit operation and practical indexes on site are used as constraint conditions; a coal blending ratio digital model which meets all the constraint conditions is established and obtained; and by means of economic analysis, experimental verification, introduction of auxiliary engine power consumption and the like, the coal blending ratio with the optimal economy is selected and an optimal and reliable coal blending scheme is obtained. According to the present invention, various coal blending schemes obtained by model calculation are subjected to economic analysis and the relatively optimal coal blending scheme is selected according to different constraint conditions; the application range of a boiler for coal types can be enlarged; under the condition of ensuring safe and environmental-friendly operation of a unit, flexibility of coal purchase is improved; and production cost of a power plant is effectively reduced.

This disclosure enables energy providers and users to establish variable pricing or maximum thresholds for individual components (aka appliances) or groups of components. The consumer (individual or business) defines a usage policy for each device or component which defines limits the consumer is willing to pay in a supply shortage. The usage policy also defines safety parameters as well as energy limiting capabilities of the appliance or component. Energy suppliers use this usage policy to determine which devices get managed or powered off in a shortage situation. With the detailed consumer supply and demand data available from this invention, energy providers may use economic analysis to better understand customer price sensitivity. This information will enable the provider to run simulations of different energy shortage scenarios.

The invention relates to a method for detecting internal leakage of a valve of a thermodynamic system in a power plant. The method comprises the following steps of: measuring outer wall temperatures of pipe segments in front of and at the back of the valve and ambient temperatures; calculating to obtain quantities of heat emission of the pipe; calculating to obtain flow velocity and flow rate of a fluid inside the pipe; and performing quantitative economic analysis on the flow rate of the fluid inside the pipe. When the leakage of working medium of the valve occurs, the pipe wall temperature rises due to heat emission. The heat transfer process tends to be stable after a certain time period if the leakage of the valve keeps unchanged, and the heat emission and the pipe wall temperatures maintain a certain value. When the calculation control volume used is short enough, the heat transfer quantities Q4 and Q5 in the longitudinal direction of the pipe are minimal and can be neglected in calculation. As a result, the heat emission of the pipe wall and the heat emission of the heat-insulating layer are close to the heat transfer of a single-layer homogenous cylindrical wall. The detection method is significant in determining inspection and repair according to the running state of the valve in the power plant, reducing internal leakage of working media of the valve in the power plant, reducing power and coal consumptions during operation and increasing operating economy.

The invention discloses an outlier detection method based on clustering. The outlier detection method comprises that a data set is obtained, k class clusters are calculated by means of an improved k_means clustering algorithm, the k class clusters are divided into a big class cluster set BC and a small class cluster set SC, outlier factors of data objects are calculated based on the big-small class cluster method and then are collected to form an outlier factor sequence, and outlier data is determined based on the outlier factor sequence. The outlier detection method is advantaged in that outlier data hidden in a lot of data sets can be effectively discovered, the outlier degree of each data object is determined, the outlier detection method is accurate and efficient in detection, and can be widely applied to fields of finance, economic analysis, electronic communication, modern logistics and the like.

The invention provides a preparation method of a fiber and cold patch asphalt mixture. The fiber and cold patch asphalt mixture is prepared from the following components in percentage by mass: 0.1 percent to 0.5 percent of fiber, 3 percent to 8 percent of cold patch asphalt, 3 percent to 5 percent of filling and the balance of an aggregate material. The fibers comprise polyester fibers, cellulose fibers and the like. The cold patch asphalt component is prepared from asphalt, a diluting agent and a clay mineral material. The clay mineral material comprises bentonite, kaolin, attapulgite, diatomite and the like. According to the cold patch asphalt mixture prepared by the invention, pavement performance, including Marshall stability, high-temperature stability, low-temperature crack resistance, water stability and the like, is remarkably improved. Technical and economic analysis shows that the prepared fiber and cold patch asphalt mixture has obvious economic benefits and has a very good application prospect.

A system for generating updated reactive capability curves of a generator operates the generator at a number of operating load levels and at a number of different power factors to collect data regarding the real and reactive power generated at each of the various operating load levels and power factors. Subsequently, the system analyzes the collected data to determine an actual reactive capability curve of the generator. The system also provides generator health monitoring and identifies changes and trends in the capability curves of the generator. The updated reactive capability curves may be used by an economic dispatch program in determining optimum MW and MVAR setpoints for the generator.

The invention discloses an industrial-business-information analysis report generation method and system. The method includes the steps that an industrial-business-information analysis report template is set and stored to a database server; industrial business information and spatial distribution information are obtained, and GIS-based spatial correlation relationship between the industrial business information and the spatial distribution information is established and stored to the database server; the industrial business information is subjected to statistics field dividing; data subjected to field dividing is subjected to real-time data editing, and the edited data is stored to a database in real time; the corresponding analysis condition is selected for the data stored to the database to carry out data extracting; the data stored to the database in real time is checked, and the successfully checked data is submitted to an economic database; the economic database is accessed, and the required economic data and the required spatial data are extracted, input into an economic analysis model and analyzed; the industrial-business-information analysis report template is called, the corresponding industrial-business-information analysis report template is filled with the analyzed result, and an industrial-business-information analysis report is generated.

The invention provides a power plant thermal performance analysis and optimization system. The thermal performance analysis and optimization system comprises a model management and rule management module, an index calculation and benchmarking module, a measurement data display and analysis module, a performance online analysis module, a performance offline analysis module, an operation and maintenance decision support module, and a trend early warning and fault diagnosis module, wherein the performance online analysis module is used for performing comparative analysis on different data types of a same measuring point by utilizing a comparison table, the data types comprise a measured value, a verification value and an expected value, a comparison result comprises an absolute deviation anda relative deviation, and a large deviation can be identified by colors. According to the system, a thermodynamic model is taken as a core, a performance analysis model is established according to equipment characteristics and system logic, economic analysis, diagnosis and prediction of equipment and the system are performed by utilizing real-time and historical operation data and simulation dataof the thermodynamic model, and decision support for operation mode and technical improvement is provided for owners. Finally, a power plant, a unit and equipment are helped to be maintained at a highperformance level.

The invention provides a three-dimensional evaluation method for lightning protection performance of power transmission lines based on lightning strike density statistics, which comprises the following steps: carrying out the lightning strike density statistics on ground; performing lightning protection performance calculation on the power transmission lines; conducting investment economic analysis on the line reconstruction; combining the lightning strike density, the lightning protection performance with the investment conditions of the different line reconstruction for each section to perform priority ranking of the reconstruction; and finally forming a strategy for the lightening protection reconstruction of the power transmission line. In the three-dimensional evaluation method for the lightning protection performance of the power transmission lines based on the lightning strike density statistics provided by the invention, the lighting protection performance of the power transmission lines can be exactly evaluated, and the requirements on the reconstruction of the lightning protection on the lines with the different voltage classes of power grid enterprises to can be met.

The invention provides a three-winding transformer design method suitable for 35kV distribution construction. The method comprises the steps: (1) according to the layout scheme of a 35kV distribution transformer substation, determining 0.4kV side capacity; (2) setting the capacity of a transformer, and designing the body of the three-winding transformer; (3) carrying out material selection for the three-winding transformer; (4) calculating the operation loss of the three-winding transformer; (5) carrying out economic analysis on the power distribution station. The three-winding transformer design method suitable for 35kV distribution construction, provided by the invention, aims at the current distribution construction of 35kV transformer substations in remote and border areas, a main transformer of each 35kV transformer substation mainly adopts a 35/10/0.4kV three-winding transformer, the 0.4kV side is configured with proper capacity to be used as a power supply for loads of the substation and surrounding loads of the transformer substation, the economical efficiency is analyzed in the two aspects of cost saving and loss reduction, meanwhile, an on-load tap changer is equipped after selectivity is considered, and the economical operation of the transformer is realized.

The invention provides an enterprise operating rate obtaining method based on electric energy service management platform, which is characterized by following steps: setting a using threshold of electric power for various enterprises based on data concerning their historical use of electric power; obtaining data concerning the use of electric power of enterprises from the electric energy service management platform and determining the operating condition of the enterprises based on their electric power using condition; performing cluster partition to enterprises and calculating the operating rate of enterprises in different sectors. The method effectively calculates the operating rate of enterprises and can be applied to evaluate the running state of enterprises and their situation for employment. By analyzing the power using condition of enterprises, the method lays an important basis for government macroscopic economic analysis and power grid scheduling.

The invention relates to a cartoon analysis method for the geographic distribution and the time trend of the price of a commodity in the field of economic analysis. The method comprises the following steps: (1), manufacturing a background diagram with the geographical position of each market; (2), dividing the price of a designated commodity in each market into a plurality of sections; (3), setting the color value of each price section; (4), drawing a commodity price distribution diagram: drawing a colored spot distribution diagram; marking one spot at the geographical position of each market in the background diagram; fully filling the spots of the color values according to the color values set by the price section of each market, wherein the colored spots can also be expanded into the polygon of a representative area of the market and are connected with the polygon of each adjacent market in a seamless way, and a colored cloud-shaped distribution diagram is drawn; and (5), manufacturing a commodity price dynamic distribution cartoon, drawing a plurality of distribution diagrams according to different time points and displaying each diagram continuously according to a time sequence at a designated speed to form the cartoon. The invention provides a vivid and dynamic commodity price analysis technology, can guide the production and the sale of commodities, improves a production plan, promotes the commodity circulation and meets the consumption requirement.

The invention relates to a physical distribution geographical information system which comprises various physical distribution models, physical distribution process flow, physical distribution scene and a physical distribution economic analysis special subject diagram; on the basis of network dataset, the physical distribution models can obtain optimized results on the actual path and show the results; on the basis of network data acquisition, the physical distribution process flow can make dynamic simulation on the actual path; based on vector data and image data, a plurality of typical physical distribution scenes can be shown on a computer screen; on the basis of physical distribution economic data, ten thousand years of physical distribution economic data can be displayed by the physical distribution economic analysis special subject diagram to the user in a form of diagram. The physical distribution process flow and the physical distribution models are set up on the generated network dataset. The invention can be applied to the teaching of the interrelated specialized field of physical distribution, the training and the like, leads teaching and studying to be more visualized and is beneficial to better acquiring and studying physical distribution geographical knowledge by the student.

The invention discloses a method for establishing a desulfurization system operation condition database, and the method comprises the steps: step 1, importing historical operation data of a desulfurization system, carrying out the data processing of the historical operation data, and removing abnormal data; step 2, analyzing the health data retained in the step 1 by adopting a principal componentanalysis method to obtain new characteristic quantities; step 3, performing economic analysis on the desulfurization system, and proposing an economic evaluation index of the desulfurization system; step 4, determining the number of clustering clusters by using an elbow rule; step 5, clustering the new characteristic quantities obtained in the step 2 by using a fuzzy C-means clustering method, andobtaining an economic optimal point in each class by combining the economic evaluation index in the step 3; step 6, carrying out data processing of the steps 1 to 6 on the real-time operation data ofthe desulfurization system, obtaining real-time operation data of the desulfurization system, clustering the real-time operation data into an existing class obtained in the step 5, and indicating theeconomic optimal point of the real-time operation data in the class where the real-time operation data is located as the optimal working condition point.

The invention relates to a resource development method suitable for polymer flooding, and belongs to the technical field of chemical flooding oil development. The oil reservoir condition, permeabilitydifference, thickness, well group condition and residual oil condition are taken into integrated consideration to determine an oilfield block; and resources of different reserve units are ordered according to the oil price by combining well pattern manners, value simulation and economic analysis, and a polymer flooding reserve resource corresponding to the present oil price is determined. The polymer flooding is used fully in the situation of low oil price to further improve the recovery efficiency and reduce successive decrease of maturing fields, the low-cost polymer flooding resource wellgroup screening standard is reached, and potentials of the polymer flooding resource are authenticated in the technical and economical aspects by means of an empirical formula, value simulation and economic analysis, and benefit of polymer flooding is developed.