34 results about "Energy flow analysis" patented technology

The invention discloses a probability energy flow analysis method for an integrated energy system (IES). According to the method, the concept of probability energy flow widely applied to an electric power system (EPS) is generalized to probability energy flow analysis of the IES, the influence on the state quantity probability distribution of the IES from the uncertainty of electricity, gas and heat loads of the IES and output of a wind power plant is quantitatively evaluated, and therefore a foundation is laid for subsequent network planning, steady-state analysis, optimized dispatching, real-time control, safety analysis and the like of the IES.

The invention relates to a micro-grid energy optimization and evaluation method based on a full energy flow model. The method includes following steps: (1) building the full energy flow model: including energy and energy flow analysis; energy conversion link analysis, energy distribution link analysis, energy storage link analysis, and energy utilization link and energy management link analysis; (2) building a full energy flow network model; (3) performing energy optimization management based on the full energy flow network model including energy static optimization management and energy dynamic optimization management; (4) establishing an index system of the full energy flow model; and (5) performing comprehensive evaluation of the full energy flow model. According to the method, processes of generation, conversion, transmission, storage, and utilization of different types of energies in a micro-grid are described via the manner of digital abstract representation, the index system is established, the micro-grid energy optimization method is proposed, unified quantification of different types of energies is realized via digital representation of energy flow, and comprehensive analysis and evaluation of energy efficiency utilization of overall and partial links are performed.

The invention relates to a method for predicting psychoacoustic parameters in a high-speed train based on statistical energy flow analysis. The method comprises the steps of: acquiring high-speed train exterior noise source excitation; conducting a sound insulation test on a high-speed train body structure sample piece; conducting an internal loss factor test on a high-speed train interior sound cavity; conducting an internal loss factor test on high-speed train interiors; predicting a sound pressure level inside the train by utilizing a statistical energy flow analysis method; and calculating and analyzing psychoacoustic objective parameters in the high-speed train. The method has the beneficial effects that the method for high-speed train interior noise simulation and modeling analysis and interior psychoacoustic objective parameter prediction is provided, is more rapid and accurate when compared with prediction methods utilizing a BP neural network and the like, and is more suitable for engineering practice.

The invention discloses an integration testing method for analyzing the energy flow of a finished automobile. The method comprises the steps of installing a testing element of a power transmission system, installing a cooling system, an air conditioning system, a gas exhaust piping, a lubricating system, and a testing element for testing the network of an electric appliance, installing testing elements for a passenger compartment and an engine compartment, creating a testing environment, and testing and recording the real-time parameters of the above subsystems, wherein the cooling system, the air conditioning system, the gas exhaust pipe, the lubricating system and the testing element for testing the network of the electric appliance are connected with an engine. By the testing method, the real-time parameters of various subsystems of the same automobile under the same environment and working conditions are recorded, and the requirements of the analysis of energy flow of the finished automobile on the real-time parameters of the various subsystems are met.

The invention relates to a micro-grid modeling approach, in particular to a micro-grid versatile flow modeling method based on different types of energy. The approach comprises the steps of (1) constructing a versatile flow model, including energy and energy flow analysis, energy conversion link analysis, energy distribution link analysis, energy storage link analysis, energy utilization link analysis and energy management link analysis; and (2) constructing a versatile flow network model. The approach systematically describes the energy characteristics of energy flow in the processes of generation, conversion, transmission, storage and utilization through a unified quantitative versatile flow digital model. Meanwhile, the theory can also be used flexibly for energy unified quantitative analysis of a single device through lumped constraints. In practical applications, the invention can freely and flexibly select each links in the energy network as required, takes factors under different situations and constraints into full consideration, systematically establishes a corresponding versatile flow model, and achieves unified quantitative analysis of different types of energy in a micro-grid.

The invention discloses a multiple uncertainties-considered natural gas probability-fuzzy energy flow analysis method. The method mainly comprises the following steps of: 1) establishing a natural gassystem model; 2) establishing a probability model of non-equilibrium node loads; 3) sampling the probability model of the non-equilibrium node loads by utilizing a Latin hypercube method, so as to obtain an N*NL-dimensional load probability sample matrix; 4) establishing a fuzzy model of pipeline comprehensive parameters; 5) sampling the fuzzy model of the pipeline comprehensive parameters by utilizing a <alpha>-cut set method; 6) calculating a pipeline energy flow and pipeline non-equilibrium node bearing pressure in the natural gas system by utilizing a newton method; and 7) calculating a possibility measure Pos and a necessity measure Nec of an output variable, so as to obtain a credibility function Bel and a verisimilitude function Pl of the output variable. The method combines the influences of two uncertain factors such as probability and fuzziness, and is capable of effectively and correctly calculating change ranges of output variables of natural gas systems.

The invention relates to a dynamic power balance analyzing system for a lunar explorer and belongs to the technical field of lunar explorers. According to the dynamic power balance analyzing system disclosed by the invention, the energy analyzing process of the whole process from the emulation start to emulation ending is realized, relevant information conditions of power balance in the whole flying process are dynamically displayed and the omni-bearing power balance information is presented by using various modes such as a process curve, graph display and digital list display. The dynamic power balance analyzing system has a function of modifying flying programs; users can be allowed to simply input new flying programs; and the adaptability of different programs is solved. According to the dynamic power balance analyzing system disclosed by the invention, a system model library is established; parameters of the system model library are outputted to fit actual telemetry parameters of an aircraft and an analysis result with higher accuracy is obtained.

The invention provides an embodied carbon energy-based machine tool equipment product carbon emission quantification method. The method comprises three parts, i.e., machine tool equipment product material flow and energy flow analysis, a machine tool equipment product carbon emission quantification model and an embodied carbon energy-based carbon emission quantification method. A machine tool equipment product material flow and energy flow superposition principle is provided by analyzing the characteristics of energy flow and material flow; a carbon emission boundary model at a main lifecycle stage is established, and a machine tool equipment product carbon emission quantification principle is given based on an embodied carbon energy concept; an embodied carbon energy-based specific carbon emission calculation formula is obtained according to the characteristics of the main lifecycle stage. The invention adopts an embodied carbon energy quantification method, which takes a product as the boundary, for providing data support for a low carbon design, and is more close to the target object requirements of actual low-carbon optimization improvement, so that the practicality and consistency of the carbon emission boundary and a calculation result are guaranteed, and an effective basis and theoretical support are provided for energy conservation and emission reduction of products manufactured by machine tool equipment.

The invention discloses an energy flow decoupling analysis and calculation method for a distributed combined cooling, heating and power comprehensive energy system. The system comprises a cooling / heating / power network, an auxiliary electrical device, a combined cooling, heating and power distributed power supply and an independent electric cooling / heating device. Through the known voltage amplitude and a phase angle of a connection point of a comprehensive energy network and an external power network, the power of the other power loads except the electric cooling / heating device and the auxiliary electrical device of the cooling / heating network at the nodes of a power supply network, the generating power of each distributed power supply, the supply / return temperature of the node where the combined cooling, heating and power distributed power supply is located in the cooling / heating network, the total cooling / heating load power required by each node of the cooling / heating network, and the network characteristic parameters of the cooling / heating / power network, the voltage and line power of each node of the power supply network, the cold / heat supply power of each node of the cooling / heating network and the electric power of the auxiliary electrical device in the comprehensive energy system are solved. The energy flow analysis and calculation method better meets the requirements ofactual application scenes, the algorithm is simple and easy to understand, and the solving speed is high.

The invention discloses a multi-network steady-state energy flow analysis method and device for an electricity-gas comprehensive energy system. The multi-network steady-state energy flow analysis method comprises the following steps: respectively carrying out topology analysis on an electrical network and a natural gas network in a to-be-analyzed electricity-gas comprehensive energy network, and determining an electrical network equation and a corresponding electrical system variable, a natural gas network equation and a corresponding natural gas system variable, an electricity-gas coupling element equation and a corresponding additional variable; and solving a nonlinear algebraic equation set comprising a power network equation, a natural gas network equation and a coupling element equation to obtain the value of the electrical system variable, the value of the natural gas system variable and the value of the additional variable, wherein the value of the electrical system variable, the value of the natural gas system variable and the value of the additional variable form a steady-state energy flow of the to-be-analyzed electricity-gas comprehensive energy network. The multi-network steady-state energy flow analysis method and device for an electricity-gas comprehensive energy system are good in accuracy, low in calculation amount and high in calculation efficiency.

The invention relates to an energy flow analysis-based vehicle energy management system and an energy flow analysis-based vehicle energy management method. The energy flow analysis-based vehicle energy management system comprises a vehicle electronic control management system, an electronic control unit, a control area network (CAN) bus, a water pump flow control device, an oil pump flow control device and an idle start-stop device. According to the system and the method, energy loss of an engine is reduced by controlling the cooling, lubrication and idle running of the engine.

The invention discloses a dynamic probabilistic energy flow analysis method considering the uncertainty of integrated demand response and a computing device. The method includes: based on the characteristics of a power-air interconnected system, establishing a source-side model for dynamic probabilistic energy flow analysis, based on the source network side model and combined with the characteristics of the terminal energy load, constructing an integrated demand side response model, the integrated demand side response model including a plurality of traditional probabilistic variables and uncertain variables, performing consistent processing on each uncertain variable in the integrated demand side response model to update the integrated demand side response model, determining an optimal dynamic electricity price, and updating the updated comprehensive demand side response model again according to the actual response quantity distribution of various loads under the optimal dynamic electricity price; solving the re-updated comprehensive demand side response model to calculate the dynamic probabilistic energy flow in the power-gas interconnected system.

The invention provides an intelligent distribution transformer which can transfer information such as electric quantity of a user and the like to a smart grid according to energy flow analysis of the transformer. In the invention, the transformer is equipped with a single-chip microprocessor intelligent device, and the intelligent device and the transformer form an electrical signal connection through an electric quantity sensor and a status sensor which are arranged on the transformer so as to detect the energy flow and operating status of the transformer; the generated signals are delivered to an intelligent unit for analysis processing to obtain various electric quantity information of the user and the status information of the transformer; and the relevant information is intercommunicated with the smart grid through a communication module. The intelligent distribution transformer has the advantage that various electric quantity parameters of the user and the state quantity of the transformer can be intercommunicated with the smart grid.

The invention discloses an integration testing method for analyzing the energy flow of a finished automobile. The method comprises the steps of installing a testing element of a power transmission system, installing a cooling system, an air conditioning system, a gas exhaust piping, a lubricating system, and a testing element for testing the network of an electric appliance, installing testing elements for a passenger compartment and an engine compartment, creating a testing environment, and testing and recording the real-time parameters of the above subsystems, wherein the cooling system, the air conditioning system, the gas exhaust pipe, the lubricating system and the testing element for testing the network of the electric appliance are connected with an engine. By the testing method, the real-time parameters of various subsystems of the same automobile under the same environment and working conditions are recorded, and the requirements of the analysis of energy flow of the finished automobile on the real-time parameters of the various subsystems are met.

The invention discloses an energy flow analysis method and system for an engineering vehicle. The method comprises the steps of obtaining parameter data of a power system, a transmission system, a hydraulic system and a heat dissipation system in the engineering vehicle; based on the obtained parameter data, calculating input energy, output energy and efficiency of the power system, the transmission system, the hydraulic system and the heat dissipation system respectively; and based on the calculated energy and efficiency of each system, analyzing to obtain transmission, utilization and lossesof energy flow. According to the energy flow analysis method and system, the transmission, utilization and losses of the energy flow are analyzed, and the energy flow analysis can be completed quickly and effectively.

The invention relates to a steel enterprise energy flow analysis method based on an energy multi-stage transmission model. The technical characteristics are that the method includes the following steps: step 1, establishing an steel enterprise energy multi-stage transmission model of an entire energy flow process including energy input and energy utilization; and step 2, on the basis of the steel enterprise energy multi-stage transmission model in the step 1, establishing a steel enterprise energy flow network including energy input, energy consumption and energy output, establishing an energy flow model of a steel enterprise through analysis of energy flow during energy conversion of a steel enterprise energy consumption process, and then analyzing energy flow in the steel enterprise. From the three aspects of energy input, energy conversion and energy output, energy flow status quo in the steel enterprise is analyzed, and thus energy utilization ways in the steel enterprise are obtained.

The invention relates to a battery module structure design method based on energy flow analysis. The method comprises the following steps: obtaining constraint conditions and preset battery module heat spread time T, and constructing a battery module model; carrying out heat spread simulation analysis on the battery module model in simulation software, if the heat spread time t is greater than the preset battery module heat spread time T, obtaining the optimal battery module model, otherwise, carrying out energy flow analysis, increasing the heat flow path of the single battery, reducing the heat transfer between the adjacent single batteries, and obtaining the optimal battery module model. And performing thermal spread simulation analysis again. Compared with the prior art, the method has the advantages that the battery module model which meets the constraint condition and is relatively long in heat spreading time is found by changing the arrangement mode of the single batteries, the volume constraint and heat spreading time requirements of the battery module are considered, and the obtained battery module model can buy enough time for fire-fighting measures; and the possibility of occurrence of disasters and accidents is reduced.

The invention relates to a dynamic power balance analyzing system for a lunar explorer and belongs to the technical field of lunar explorers. According to the dynamic power balance analyzing system disclosed by the invention, the energy analyzing process of the whole process from the emulation start to emulation ending is realized, relevant information conditions of power balance in the whole flying process are dynamically displayed and the omni-bearing power balance information is presented by using various modes such as a process curve, graph display and digital list display. The dynamic power balance analyzing system has a function of modifying flying programs; users can be allowed to simply input new flying programs; and the adaptability of different programs is solved. According to the dynamic power balance analyzing system disclosed by the invention, a system model library is established; parameters of the system model library are outputted to fit actual telemetry parameters of an aircraft and an analysis result with higher accuracy is obtained.

The invention discloses a natural gas probability-fuzzy energy flow analysis method considering multiple uncertainties, which mainly includes the following steps: 1) Establishing a natural gas system model. 2) Establishing a probability model of the unbalanced node load. 3) Sampling the probability model of the unbalanced node load by using the Latin super-cubic method, so as to obtain an N×NL dimensional load probability sample matrix. 4) Establish the fuzzy model of the comprehensive parameters of the pipeline. 5) Sampling the fuzzy model of the comprehensive parameters of the pipeline using the α-cut method. 6) Using Newton's method to calculate the pipeline energy flow and pipeline unbalanced node pressure in the natural gas system. 7) Calculate the possibility measure Pos and the inevitability measure Nec of the output variable, so as to obtain the belief function Bel and the plausibility function Pl of the output variable. The invention combines the influence of two types of uncertain factors, probability and fuzzy, and can effectively and accurately calculate the variation range of the output variable of the natural gas system.

The invention relates to a micro-grid modeling approach, in particular to a micro-grid versatile flow modeling method based on different types of energy. The approach comprises the steps of (1) constructing a versatile flow model, including energy and energy flow analysis, energy conversion link analysis, energy distribution link analysis, energy storage link analysis, energy utilization link analysis and energy management link analysis; and (2) constructing a versatile flow network model. The approach systematically describes the energy characteristics of energy flow in the processes of generation, conversion, transmission, storage and utilization through a unified quantitative versatile flow digital model. Meanwhile, the theory can also be used flexibly for energy unified quantitative analysis of a single device through lumped constraints. In practical applications, the invention can freely and flexibly select each links in the energy network as required, takes factors under different situations and constraints into full consideration, systematically establishes a corresponding versatile flow model, and achieves unified quantitative analysis of different types of energy in a micro-grid.

The invention provides an embodied carbon energy-based machine tool equipment product carbon emission quantification method. The method comprises three parts, i.e., machine tool equipment product material flow and energy flow analysis, a machine tool equipment product carbon emission quantification model and an embodied carbon energy-based carbon emission quantification method. A machine tool equipment product material flow and energy flow superposition principle is provided by analyzing the characteristics of energy flow and material flow; a carbon emission boundary model at a main lifecycle stage is established, and a machine tool equipment product carbon emission quantification principle is given based on an embodied carbon energy concept; an embodied carbon energy-based specific carbon emission calculation formula is obtained according to the characteristics of the main lifecycle stage. The invention adopts an embodied carbon energy quantification method, which takes a product as the boundary, for providing data support for a low carbon design, and is more close to the target object requirements of actual low-carbon optimization improvement, so that the practicality and consistency of the carbon emission boundary and a calculation result are guaranteed, and an effective basis and theoretical support are provided for energy conservation and emission reduction of products manufactured by machine tool equipment.

The invention discloses a quasi-steady-state energy flow analysis method of an electricity-water comprehensive energy system. The method comprises the steps: 1) acquiring network structure parametersof the electricity-water comprehensive energy system; 2) obtaining the initial steady-state energy flow of the electricity-water comprehensive energy system, i.e., the energy flow distribution of thewater distribution network and the tidal current distribution of the power distribution network when the time t is equal to 0. 3) calculating the transient energy flow and the water pump power of thewater distribution network in the next time period by utilizing a characteristic line method; 4) substituting the water pump power of the next time step length into the power distribution network to serve as an electrical load, and calculating the power distribution network energy flow of the next time step length; 5) storing an energy flow calculation result, if the current time t is less than the total duration T, returning to the step 3), otherwise, outputting the energy flow of the power distribution network. According to the method, the transient characteristics of the water distributionnetwork are comprehensively considered in the process of analyzing the energy flow of the electricity-water comprehensive energy system, and the influence of the transient process of the hydraulic system with the time scale of minute level or second level on the electricity-water comprehensive energy system can be analyzed.

The invention relates to an equivalent power source-based unified multi-energy power system coupling model building method. A unified coupling model of various heterogeneous energy generation units and power plants and stations is built by adopting a power source equivalence principle. According to the method, each heterogeneous energy generation unit is equivalent to a voltage source and a controllable resistor connected in series to form a unified generation model; various heterogeneous energy power plants and stations are equivalent to controllable current sources separately; an energy storage device is equivalent to a capacitor; and coupling grid connection is carried out to form a unified multi-energy power system coupling model. The installed capacity of the power plants and stationscan be adjusted through control coefficients of the controllable current sources. The built unified multi-energy power system coupling model is suitable for static energy flow analysis of a multi-energy power system and is also suitable for dynamic process analysis, unified description of multiple time scales of the multi-energy power system is achieved, and a theoretical basis is provided for coordinated control and optimal scheduling of the multi-energy power system.

The invention discloses a probabilistic energy flow analysis method for an electric gas interconnection system considering a thermal process of a natural gas system, and the main steps are as follows:1) sampling the electric gas interconnection system. 2) establishing a device model that considers the thermal process of the natural gas system. 3) establishing a probabilistic energy flow model ofthe electrical-air interconnection system. Wherein The probabilistic energy flow model of the electrical-air interconnection system includes a node equilibrium equation and an uncertainty factor model. 4) establishing a risk indicator model. 5) inputting the sample data into the probabilistic energy flow model of the electric gas interconnection system, calculate the energy flow of the electric gas interconnection system, and input the result into the risk indicator model to calculate the risk index of the electric gas interconnection system. 6) making convergence judgment. The invention proposes a comprehensive consideration of various devices existing in the natural gas system, and a probabilistic energy flow calculation and analysis method for the thermal process in each device, which can more accurately and effectively analyze the system state and evaluate the risk situation.

The present invention discloses a vehicle electricity load performance test method. The method comprises the following steps of: S1, setting a test environment to a room temperature vehicle environment; S2, measuring a working current and a working voltage of an electricity load; S3, performing data validity determination of the working current and the working voltage; and S4, calculating equivalent resistance and power of the electricity load. The vehicle electricity load performance test method can improve the accuracy and the reliability of the vehicle electricity load detection and has animportant meaning for the vehicle energy flow analysis.

The invention discloses a multi-energy flow analysis method of an electro-thermal system based on the improved Sukhov cooling formula, comprising: identifying the topology structure of the electro-thermal system, reading the known state quantities of the energy flow of the electro-thermal system, and determining The node type of the electric-thermal system and select the balance node of the power system and the network system; set the iterative initial value of the required state quantity of the electric-thermal system energy flow, and pass the iterative initial value of the required state quantity Calculate the electric power and thermal power of the electric-thermal balance node of the electric-thermal system; establish and calculate the state deviation function according to the known state quantity and the state quantity to be requested of the energy flow of the electric-thermal system; and adopt Newton-Raphson The algorithm iteratively solves, and finally obtains the state quantities of the power system and thermal system, and calculates the data such as gas consumption rate, electric-thermal network loss, etc., which can quickly and accurately analyze the regional multi-energy flow system, which is beneficial to the multi-energy flow system. The safe and stable operation and status assessment of the system.

The invention discloses a quasi-steady-state energy flow analysis method of an electric-water integrated energy system. The steps include: 1) obtaining network structure parameters of the electric-water integrated energy system; 2) obtaining the initial steady state of the electric-water integrated energy system Energy flow, that is, the energy flow distribution of the water distribution network and the power flow distribution of the distribution network at time t=0. 3) Use the characteristic line method to calculate the transient energy flow and pump power of the water distribution network in the next period; 4) Substitute the pump power of the next time step into the distribution network as the electrical load, and calculate the power of the next time step. Distribution network energy flow; 5) Save the energy flow calculation result, if the current time t is less than the total duration T, return to step 3), otherwise, output the distribution network energy flow. The invention comprehensively considers the transient characteristics of the water distribution network in the process of analyzing the energy flow of the electric-water integrated energy system, and can analyze the influence of the transient process of the hydraulic system with a time scale of minutes or seconds on the electric-water integrated energy system.

The invention discloses an energy flow analysis method and system in an energy station, and the method comprises the steps: obtaining the power generation amount of all renewable energy electric fields connected to the energy station based on a preset operation strategy of an energy router; determining an interval to which the generating capacity of the renewable energy electric field belongs based on a pre-divided generating capacity interval of the renewable energy electric field; based on the interval of the generating capacity of the renewable energy electric field, determining the operation condition of an energy station and an adopted energy flow equation, wherein a photovoltaic power generation field and a wind power generation field in the renewable energy electric field and a generator in the combined cooling heating and power system are respectively connected with each input port of the energy router; respectively connecting the electric heating furnace and the refrigerating machine with an alternating current output port of the energy router; and connecting the flexible load with the direct current output port of the energy router. According to the invention, alternating-current and direct-current seamless hybrid power supply, plug-and-play of a distributed power supply and a flexible load device and fault isolation are realized.

The invention discloses a probabilistic energy flow analysis method for an integrated energy system. The present invention extends the concept of probabilistic power flow widely used in electric power system (EPS) to the probabilistic energy flow analysis of IES, and quantitatively evaluates the comprehensive energy system (electricity, gas, heat) load and the uncertainty of wind farm output on the comprehensive The impact of the probability distribution of the state quantity of the energy system has laid a foundation for the subsequent network planning, steady-state analysis, optimal scheduling, real-time control, and safety analysis of the integrated energy system.