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 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 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 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 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 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 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 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.