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718 results about "Economic dispatch" patented technology
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Economic dispatch is the short-term determination of the optimal output of a number of electricity generation facilities, to meet the system load, at the lowest possible cost, subject to transmission and operational constraints. The Economic Dispatch Problem is solved by specialized computer software which should satisfy the operational and system constraints of the available resources and corresponding transmission capabilities. In the US Energy Policy Act of 2005, the term is defined as "the operation of generation facilities to produce energy at the lowest cost to reliably serve consumers, recognising any operational limits of generation and transmission facilities".
Security region based security-constrained economic dispatching method
The present invention relates to a power system and provides a method for considering the network security constraints of in the operation of economic dispatch of power systems, which comprises the power flow constraint of branches, the static voltage stability constraint and the transient stability constraint, and provides an effective way for coordinating contradiction between the economy and security of power system operation. The security region based security-constrained economic dispatching method comprises the following steps: step 1, calculating the coefficients for the active power static security region, the cut-set voltage stability region and the dynamic security region respectively; step 2: building the models for security region based security-constrained economic dispatch; step 3: solving the unit on / off state optimal sub-problem through Social Evolutionary Programming; step 4: calculating the generation cost, the static voltage stability margin and the transient stability margin in the dispatching period; step 5: obtaining a feasible economic dispatching scheme, otherwise, return to step 3. The invention is mainly applied in load dispatching optimization.
Owner:TIANJIN UNIV
Methods that provide dispatchers in power grid control centers with a capability to manage changes
InactiveUS20110071690A1Easy to manageMechanical power/torque controlLevel controlProgram planningPower grid
Methods are provided that enable dispatchers in power grid control centers to manage changes. A comprehensive operating plan is provided with multiple, security constrained economic dispatch engines 1, 2 and 3. The scheduler engines are security constrained unit commitments and economic dispatch sequences with different look-ahead periods. The comprehensive operation plan is configured to integrate scheduler engines into a unified scheduling system. The comprehensive operating plan includes a repository of all operating plans in a multi-stage decision process.
Owner:ALSTOM TECH LTD
Integrated distribution system optimization
A power forecasting module determines a load forecast of a distribution system (DS) and a power generation forecast of distributed energy resources (DERs). A demand response (DR) module estimates an available DR based on the load and the power generation forecast and modifies the load forecast by dispatching an optimal DR. An energy storage commitment module determines a charging / discharging schedule of energy storage devices in the system based on the modified load profile and generates a second load profile by incorporating the charging / discharging schedule of energy storage devices. An unit commitment (UC) module determines a DER schedule of supplying electrical power to the loads in the second load profile based on a first objective function. An economic dispatch (ED) module determines an optimum operating point for each DER and an Integrated Volt-VAR Control (IVVC) module controls distribution assets to maintain a voltage profile in the system.
Owner:GENERAL ELECTRIC CO
General optimized dispatching strategy for combined supply of cooling, heating and power microgrid system
The invention belongs to the field of optimized dispatching of combined supply of cooling, heating and power microgrid systems and relates to a general optimized dispatching strategy of combined supply of a cooling, heating and power microgrid system. Based on functions of equipment, the equipment of the combined supply of cooling, heating and power microgrid system is divided into three types, namely source equipment, a convertor and energy accumulation equipment; based on load types, loads are divided into electrical loads, steam loads, hot-water loads and cooling loads; energy buses are divided based on different transmission modes of different energies on the combined supply of cooling, heating and power microgrid system; and various equipment is connected among different buses and on a single bus based on properties. The overall system adopts a bus-type structure, takes bus power balance and equipment operation constraint as constraint conditions to model the combined supply of cooling, heating and power microgrid system, and builds a dynamic economic dispatch model taking the minimum operating cost as an optimization objective to solve problems. The general optimized dispatching strategy of the combined supply of cooling, heating and power microgrid system can effectively solve the problems that the combined supply of cooling, heating and power microgrid system has various types of equipment, is complicated in coupling and difficult in dispatching.
Owner:苏州钧灏电力有限公司
Layered optimization method of regional distribution network comprising micro-grid
ActiveCN103544655AMaximize utilizationImprove receptivityForecastingSingle network parallel feeding arrangementsPower-system automationPower grid
The invention relates to an optimization method in the field of power system automation, in particular to a layered optimization method of a regional distribution network comprising a micro-grid. The method includes the following steps: (1) building a micro-grid and distribution network combined dispatching model; (2) building an efficiency-maximizing secondary dispatching model of the micro-grid; (3) optimizing the two dispatching models. According to the method, the micro-grid is taken as a controllable unit capable of dispatching independently; through coordinated dispatching of a controllable distributed power supply on the distribution network side, the micro-grid and the distribution network and bi-layer dispatching control of economic dispatch of distributed energy resources inside the micro-grid, the distributed energy resources are used in a maximized manner internally, the regional distribution network power supply and loads are dispatched optimally externally, and acceptance capability of the distraction network to the distributed power supply can be effectively improved.
Owner:STATE GRID CORP OF CHINA +2
Method for optimizing wind power system-contained unit and backup configuration
ActiveCN103151803AOverall clarityEasy to understandSingle network parallel feeding arrangementsWind energy generationElectricityMathematical model
The invention discloses a method for optimizing a wind power system-contained unit and backup configuration in the technical field of the operation and scheduling of an electric power system. The invention adopts a technical scheme that by analyzing the output characteristics of a fan, a valve point effect generated when a turbine inlet valve is suddenly opened is considered in a traditional method for analyzing the operation expense of a thermal power generating unit, and analysis on the rotary backup capacity based on the reliability index is also added; and a mathematic model for optimizing the unit and backup capacity is established, so that an optimal configuration result is obtained, and the configuration is carried out according to the configuration result. According to the method, different treatment ways of the water power in different periods are considered, and a favorable foundation is provided for the stable economical scheduling of the electric power system containing a wind power field; and the random fluctuation of the wind power is considered in the modeling process, a step for analyzing the rotary backup capacity based on the reliability index is added, the operation economical efficiency of the unit is combined with the optimized configuration of the rotary backup capacity, and a unit and backup optimization mathematic model containing the wind power field electric power system is established.
Owner:JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +3
Power-to-gas multi-source energy storage type microgrid day-ahead optimal economic dispatching method
InactiveCN106372742AIncrease profitReduce the amount of abandoned airForecastingAc network load balancingMicrogridEnergy absorption
The invention discloses a power-to-gas (P2G) multi-source energy storage type microgrid day-ahead optimal economic dispatching method. The method comprises the steps of building a P2G multi-source energy storage type microgrid model by performing modeling on a P2G multi-source energy storage type microgrid by adopting an energy concentrator method, establishing a supply side matrix expression, a conversion component matrix expression and a load side matrix expression, simultaneously establishing a supply side matrix, a conversion component matrix and a load side matrix, and obtaining a matrix expression of an energy relationship of the P2G multi-source energy storage type microgrid; and establishing a day-ahead P2G multi-source energy storage type microgrid economic dispatching model, which comprises target functions, component models and constraints. According to the method, a second microgrid is added to a power storage and heat storage device on the basis of a first microgrid, so that the wind curtailment amount is slightly reduced, the system cost is also reduced, and the advantages of multi-source energy storage are reflected; and a third microgrid is added to a P2G device, so that the wind curtailment amount is greatly reduced, the utilization rate of a fan is increased to a great extent, and the unique advantages of the P2G multi-source energy storage in the aspect of wind energy absorption are proved.
Owner:TIANJIN UNIV
System tools that provides dispatchers in power grid control centers with a capability to make changes
InactiveUS20110029142A1Mechanical power/torque controlData processing applicationsEngineeringUser interface
A system tool provides dispatchers in power grid control centers with a capability to manage changes. A user interface and a plurality of scheduler engines are provided. A comprehensive operating plan has multiple dispatch engines that are security constrained unit commitments and economic dispatch sequences with different look-ahead periods. The comprehensive operating plan is configured to integrate the dispatch engines into a unified scheduling system. The comprehensive operating plan has a data structure for capturing scheduling data, transaction scheduling, load forecast and time series data. The comprehensive operating plan is configured to coordinate scheduling data to and from power grid system applications and present a comprehensive, synchronized and harmonized view of scheduling data to at least one of, applications, power grid system operators and other stakeholders for power grid system operations.
Owner:ALSTOM TECH LTD
Multi-objective dispatching model-based microgrid energy control method under grid-connected operation mode
ActiveCN103151797AExactly reflect the actual operating statusHigh control precisionSingle network parallel feeding arrangementsReactive power adjustment/elimination/compensationPower controllerMicrogrid
The invention relates to a multi-objective dispatching model-based microgrid energy control method under the grid-connected operation mode. A microgrid comprises a plurality of microsources and a load. The method includes the following specific steps: (1) the information of each microsource and connecting lines in the microgrid is acquired by a processor, and with minimum power generation cost and environmental cost as objectives, a multi-objective economical dispatching model is created; (2) a membership function is created to fuzzify the multi-objective economical dispatching model, so that a non-linear single-objective microgrid economical dispatching model is obtained; (3) an improved genetic algorithm is adopted to optimize the non-linear single-objective microgrid economical dispatching model, so that the optimal active and reactive power data of each microsourcre and the connecting lines are obtained, and the data are transmitted to a microgrid power controller; (4) according to the received optimal active and reactive power data, the microgrid power controller controls the active and reactive power output of each microsoruce and the connecting lines. Compared with the prior art, the method has the advantages of high control precision and the like, and can guarantee the economical operation of the microgrid.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Microgrid economic operation optimization method based on fuzzy particle swarm algorithm and energy saving system
ActiveCN104135025ALow costReduce pollutionSingle network parallel feeding arrangementsWind energy generationMicrogridMathematical model
The invention provides a microgrid economic operation optimization method based on a fuzzy particle swarm algorithm and an energy saving system. The method comprises the following steps of: (1) determining an economic dispatch strategy of a micro source in the microgrid; (2) building a microgrid grid-connected economic operation mathematical model combined with economic benefit and environment benefit; (3) putting forward a fuzzy control strategy for charging / discharging control of the energy saving system; and (4) optimizing based on the particle swarm algorithm, and determining the output of all micro sources and the generation cost per day. Compared with a method in which an optimization dispatch scheme is not adopted by the energy saving system, the method has the advantages that the generation cost per day of microgrid running and pollution emission are reduced; and compared with a method in which the fuzzy control charging / discharging strategy is not adopted by the energy saving system, the method has the advantages that optimal solution quality is improved, operational convergence rate is increased, and the reliability of microgrid running is further enhanced.
Owner:STATE GRID CORP OF CHINA +4
Two-stage optimized dispatching method for virtual power plant
InactiveCN103824134AEfficient managementGuaranteed economyForecastingSystems intergating technologiesElectricity marketVirtual power plant
The invention discloses a two-stage optimized dispatching method for a virtual power plant. The two-stage optimized dispatching method comprises the steps of acquiring the power generation and power utilization information of an internal power source of the virtual power plant, and simultaneously, acquiring excitation information from a power company or a power market outside the virtual power plant, constructing an economical dispatching model, substituting the obtained information in the economical dispatching model and carrying out optimization solution, constructing a safe dispatching model, substituting network constraint information and a obtained dispatching scheme into the safe dispatching mode, and solving by a particle swarm optimization algorithm to obtain the final dispatching scheme. The two-stage optimized dispatching method for the virtual power plant is capable of realizing effective management on a large-scale distributed power source, an energy storage device, controllable load and the like, and a large-scale complex power dispatching and planning problem is decomposed into two dispatching subproblems, namely, an economic dispatching problem and a safe dispatching problem, and in addition, the complexity of calculation is reduced and the calculation time is shortened while the economical efficiency and the reliability of the dispatching scheme are guaranteed.
Owner:HOHAI UNIV
Composite energy charging energy storage system and method thereof
ActiveCN103248064AImprove operational efficiencyReduce loadEnergy storageAc network load balancingMathematical modelScheduling instructions
The invention discloses a composite energy charging energy storage system. The composite energy charging energy storage system comprises a monitoring scheduling module, a plurality of battery chargers, a power distribution module, a photovoltaic power generation module, a wind power generation module and a comprehensive energy storage module, wherein the power distribution module is connected with an external power grid; the comprehensive energy storage module is used for storing energy; and the power distribution module, the photovoltaic power generation module, the wind power generation module and the comprehensive energy storage module are connected through direct current buses and are connected to the monitoring scheduling module through data buses. The system is used for collecting required parameters, establishing an economic scheduling mathematical model for the composite energy charging energy storage system, and obtaining an optimum scheduling instruction by virtue of an improved particle swarm algorithm. The composite energy charging energy storage system is environment-friendly, reduces the impact on the power grid, is stable in operation, meanwhile has high operation efficiency, and realizes economical operation.
Owner:惠州美亿瑞创电气设备有限公司
Dynamic economic dispatching method for power system considering photovoltaic power generation
InactiveCN106058917AProof of validityVerify rationalitySingle network parallel feeding arrangementsPhotovoltaic energy generationStatistical analysisGrowth of photovoltaics
The invention discloses a dynamic economic dispatching method for a power system considering photovoltaic power generation. The method comprises the following steps: historical meteorological data are acquired for statistical analysis, and solar irradiance and temperature prediction curves in the next 24 hours are obtained; statistics on historical load data is carried out, and a power system load curve in the next 24 hours is predicted and obtained; a photovoltaic power station output model is built, and a photovoltaic output prediction curve in the next 24 hours is obtained; according to a photovoltaic output probability distribution model, the photovoltaic output probability distribution in the next 24 hours and photovoltaic output values in different scenes are obtained; a dynamic economic dispatching optimization model for the power system with the photovoltaic power station is built, and a risk reserve curve is obtained; the risk reserve capacity is calculated, and a risk capacity curve is obtained; a basic UC optimization problem is solved, and a unit commitment scheme is corrected; and a dispatching scheme with the minimum target function found out during an operating cost expected value process is solved as the optimal economic dispatching scheme. The operation risk controllability and the operation economy of the power system are ensured.
Owner:STATE GRID SHANDONG ELECTRIC POWER +1
Distributed energy management method and distributed energy management device composed of ground layer, intermediate layer and energy management layer
ActiveCN104167763AStable voltageFrequency stabilityEnergy industrySingle network parallel feeding arrangementsStructure of Management InformationShort terms
The invention relates to a distributed energy management method and device. The distributed energy management device is composed of a ground layer, an intermediate layer and an energy management layer. The ground layer comprises a distributed power controller, an energy storage controller, a load controller, an invertor, a converter and a breaker. The intermediate layer comprises a data communication module, an operation control module, an energy storage management module and a load management module. The energy management layer comprises a data communication and monitoring module, an economic dispatch and optimal operation module, a load prediction module and a power generation prediction module. The ground layer and the intermediate layer coordinate and control short-term power in a local micro-grid system to be stable; the energy management layer coordinates and controls long-term power in the micro-grid system where the energy management layer belongs to be stable, and economization of micro-grid operation is achieved; meanwhile, the distributed energy management device is clear in structure, functions are specific, and system upgrade and function extension are facilitated.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD
Power grid safety optimization dispatching method considering demand response
ActiveCN106712005AReduce operating costsOptimizing Load ProfilesData processing applicationsSystems intergating technologiesOperational costsComputational model
The invention discloses a power grid safety optimization dispatching method considering demand response. The method comprises the following steps: establishing a dynamic excitation compensation mechanism, and carrying out modeling on demand response behaviors of a user according to load shedding and transfer features; establishing a calculation model of power grid reliability index loss-of-load probability and expected energy not supplied; converting a reliability index into an economic index and integrating the index into an objective function, and establishing a day-ahead economic dispatch model with the total operation cost minimum being as an objective; establishing constraint conditions to enable an electric power system to meet system constraints, unit constraints and security constraints; and carrying out solving through calculation software to obtain an optimal day-ahead economic dispatch result. The demand response and reliability index are integrated into day-ahead dispatching of the electric power system, and the optimal dispatching model considering dynamic excitation compensation and expected power failure loss is established, thereby coordinately solving the problem of unit commitment of a generation power side and the problem of supply-demand interaction of a demand side and realizing economy and security of operation of a power grid.
Owner:SOUTHEAST UNIV
Solving large-scale security-constrained economic dispatch problem in real-time
InactiveUS20130018517A1Mechanical power/torque controlData processing applicationsOptimization problemElectric power
A system, a method and a computer program product for determining an amount of an electric power to be generated in an electric power system and determining a total cost for generating the amount of electric power while satisfying at least one contingency constraint and one or more customer request. The system creates an optimization problem for calculating amount of the electric power to be generated and a total cost for generating the calculated amount of the electric power while meeting the at least one contingency constraint. The system runs the optimization problem in real-time. The system outputs, from the optimization problem, an output specifying the calculated amount of the electric power and the total cost to generate the calculated amount of the electric power.
Owner:IBM CORP
Security constraint economic dispatch method based on security domains
InactiveCN102983573ADefine Safety MarginData processing applicationsPower network operation systems integrationTransient statePower flow
Owner:TIANJIN UNIV
Day-ahead economic scheduling method for electric-pneumatic coupled system based on mixed integer second-order cone programming
ActiveCN108846507ARealize the solutionPrecisely optimize the operation planForecastingSteady stateNatural gas
The invention discloses a day-ahead economic scheduling method for an electric-pneumatic coupled system based on mixed integer second-order cone programming. A function whose all-day energy and spareall-in cost are minimum is used as a target function, and constraint conditions of a power system and a natural gas system, and electric-pneumatic coupling and conversion relations are considered, toestablish an optimization model of electric-pneumatic coupled system day-ahead economic scheduling. On the basis of the model, through second-order cone relaxation of a steady-state airflow equation of a gas pipeline, a mixed integer second-order cone programming model of day-ahead economic scheduling of the electric-pneumatic coupled system is established, and an initial operation scheme is solved and obtained. Aimed at a problem that an initial scheduling result of a natural gas system is not accurate, a calibration model based on a steady-state power flow calculation method of a natural gassystem is established, so as to modify an initial operation scheme. The method realizes accurate solution of a non-convex nonlinear optimization problem, and provides a feasible, economical and accurate optimal operation scheme for electric-pneumatic coupled system day-ahead scheduling.
Owner:XI AN JIAOTONG UNIV
Multi-region asynchronous coordination dynamic economic dispatching method based on robustness tie line plan
ActiveCN106327091ATake advantage ofFast convergenceResourcesSystems intergating technologiesElectricityMatrix expression
The invention relates to a multi-region asynchronous coordination dynamic economic dispatching method based on a robustness tie line plan, and belongs to the technical field of operation and control of a power system. The method comprises the steps of firstly, establishing a multi-region asynchronous coordination dynamic economic dispatching model based on a robustness tie line plan in consideration of wind power uncertainty, wherein the established model is a two-phase robustness optimization model, and the model is composed of a target function and a constraint condition; and then converting the established multi-region asynchronous coordination dynamic economic dispatching model into a matrix expression, solving the model by adopting a solution algorithm based on a constraint-column generation method, and performing economic dispatching by using the result. The peak-load regulating capacity of different regions of a grid is sufficiently developed in consideration of wind power uncertainty, so that the method adapts to quick fluctuation of wind power and can effectively reduce abandoned wind.
Owner:TSINGHUA UNIV
Isolated island micro-grid layered distribution type control strategy based on consistency theory
ActiveCN109687526AQuick responseStable voltageSingle network parallel feeding arrangementsResourcesPower controllerInner loop
The invention provides an isolated island micro-grid layered distribution type control strategy based on a consistency theory. The isolated island micro-grid layered distribution type control strategycomprises the steps: firstly, a primary droop control strategy is proposed, a distribution type multi-loop controller based on droop control is designed and comprises an outer loop power controller and an inner loop voltage and current controller, distribution type power supply quick response is achieved, and the system voltage and frequency are stabilized; then based on a finite time consistencyalgorithm, a translational droop curve method and a voltage-reactive droop coefficient correcting method, distribution type secondary frequency control and secondary voltage-reactive control strategies are proposed, frequency and voltage deviations caused by primary droop control are corrected, and reactive power proportional distribution is achieved; and finally, an economic dispatching model isbuilt by considering the optimal total power generating cost of a micro-grid system as a target, solving is carried out by adopting a Lagrangian dual decomposition method, an isolated island micro-grid distribution type economic dispatching method is further proposed based on the finite time consistency algorithm, and thus the optimal output active power of all distribution type power supplies isindependently solved locally.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
AC-DC series-parallel regional power grid spot market clearing calculation optimization method and device
ActiveCN110874692AImprove clearing calculation efficiencyBest configurationResourcesSystems intergating technologiesPower gridResource allocation
The invention relates to an AC-DC series-parallel regional power grid spot market clearing calculation optimization method and device. The method comprises the steps of obtaining basic data; accordingto the basic data, establishing and solving an AC-DC series-parallel regional power grid spot market safety constraint unit combination model to obtain a safety constraint unit combination model calculation result; establishing and solving an AC-DC hybrid regional power grid spot market safety constraint economic dispatching model according to the basic data and the safety constraint unit combination model calculation result to obtain a safety constraint economic dispatching model calculation result; establishing and solving an AC-DC hybrid regional power grid spot market node marginal electricity price calculation model according to the basic data and the safety constraint economic dispatch model calculation result to obtain a node marginal electricity price, wherein the node marginal electricity price is used for resource allocation optimization. By the adoption of the method, spot market clearing calculation efficiency can be effectively improved, optimal resource allocation can beefficiently achieved, and time and labor are saved.
Owner:CHINA SOUTHERN POWER GRID COMPANY
A virtual power plant optimal scheduling method based on a master-slave game strategy
InactiveCN109902884AAccurate descriptionAccurately reflectForecastingResourcesLoad forecastingElectricity market
The invention discloses a virtual power plant optimization scheduling method based on a master-slave game strategy. The method comprises the following steps: 1, analyzing and constructing a virtual power plant model containing multiple load types; 2, establishing a virtual power plant transaction model based on an existing power market transaction mechanism; 3, establishing a risk cost model considering uncertain factors; 4, carrying out optimal scheduling on the virtual power plant by adopting a master-slave game strategy; And 5, solving the optimized scheduling model through a reinforcementlearning algorithm. According to the method, the volatility of distributed energy output in the virtual power plant and the uncertainty of load prediction are considered, an economic dispatching modelof the virtual power plant in the power market is constructed, and a master-slave game strategy and a reinforcement learning algorithm are adopted for optimization solution, so that the purposes of improving the production benefits of the virtual power plant and reducing the load power purchase cost are achieved.
Owner:HEFEI UNIV OF TECH
Internet and thermal power plant heat production operation integrated management platform
ActiveCN105243457AGuaranteed functionImprove performanceForecastingSystems intergating technologiesPrivate networkThe Internet
The invention discloses an internet and thermal power plant heat production operation integrated management platform. The internet and thermal power plant heat production operation integrated management platform comprises a centralized dispatching control center, six important functional subsystems such as a heat and power generation optimized dispatching subsystem, a heat transmission and control subsystem, a pipe network safety management subsystem and the like, as well as long-distance pipe networks and user control terminals, wherein the user control terminals are accessed to the internet through a mobile communication network; the centralized dispatching control center and the functional subsystems are connected with each other through an industrial control network and connected with the internet; the heat and power generation optimized dispatching subsystem is connected with DCS of each generator set through the industrial control network; and the heat transmission and control subsystem is connected with each long-distance pipe network and each user control terminal through the internet and the mobile communication network. Through the internet and the private network, the heat production and operation businesses and the target requirements of the thermal power plants are integrated on one platform, so that the data share and business integration are realized, the production and operation efficiency is optimized, and the economic dispatching operation level and the enterprise management level are improved.
Owner:SOUTHEAST UNIV
AC/DC power distribution network scheduling method considering wind power uncertainty
InactiveCN110782363AOptimizing Operational ResearchFit closelyData processing applicationsSingle network parallel feeding arrangementsPower qualityReliability engineering
The invention discloses an AC / DC power distribution network scheduling method considering wind power uncertainty, being characterized in that factors such as a flexible adjustment range, an adjustmentrate and adjustment time are considered; quantitative evaluation is carried out on source network load flexibility resources of the AC / DC power distribution network; an AC / DC power distribution network operation flexibility evaluation index and a calculation method are defined; based on non-parametric kernel density estimation and a confidence interval method, constraint conversion of a power distribution network flexibility demand considering wind power uncertainty is realized; and an implementation scheme of a layered and partitioned scheduling strategy in the AC / DC power distribution network is determined, and a multi-target day-ahead flexible economic scheduling model of the AC / DC power distribution network is established by taking the operation economy and the electric energy qualityof the power distribution network as target functions and taking controllable operation parameters in the converter station and the AC / DC power grid as decision variables. On the premise of ensuringthat the AC / DC power distribution network deals with system uncertainty fluctuation, the system network loss is further reduced, and the node voltage level is improved, and the RES acceptance level isimproved, and the total system scheduling cost is reduced.
Owner:SOUTHEAST UNIV
Day-ahead economic dispatch method for virtual power plant
ActiveCN103971181AOvercome poor calculation resultsImprove computing efficiencyForecastingSystems intergating technologiesElectricity priceMathematical model
The invention provides a day-ahead economic dispatch method for a virtual power plant. The method includes the following steps that first, a day-ahead economic dispatch mixed integer linear programming mathematical model making benefits of the virtual power plant maximum is built, and in an objective function, a stochastic programming method is adopted for handling the uncertainty of electricity price; second, constraint conditions are built to make an electric power system meet power constraint, unit operation constraint and contract electric quantity constraint, and in the constraint conditions, a robust optimization method is adopted for handling the uncertainty of generated output of renewable energy; third, a prediction error coefficient and a robust coefficient are set; fourth, calculation software is used for obtaining an optimum day-ahead economic dispatch result. Compared with the prior part, the method has the advantages of being good in calculation result, high in calculation efficiency and the like.
Owner:HOHAI UNIV
Typical daily load characteristic-based power load forecasting method
ActiveCN104992238AForecast load trendImprove consistencyForecastingInformation technology support systemCorrelation coefficientUtilization behavior
The invention discloses a typical daily load characteristic-based power load forecasting method, including: collecting power load data of users in a set industry in a set area, and performing preprocessing on the data; obtaining typical daily load curves of the users and an industry overall load curve; obtaining a correlation coefficient of the typical daily load curves of the users; classifying the users according to a power utilization laws of the users; and selecting a user whose power load change trend has the highest consistency with an industry overall load change, and forecasting power load data of an overall industry through the power utilization behavior laws of the user. The typical daily load characteristic-based power load forecasting method provided by the invention has the beneficial effects of being capable of deriving a forecast of an abnormality of a specific industry and even a whole society power load abnormality from an abnormality of a certain user power load, improving accuracy of a power load forecasting result, and providing a power guarantee for reasonable economic dispatching of an electric power system, reduction of production cost, and prevention of a large-area power failure of a power grid or a power grid breakdown.
Owner:国网山东省电力公司营销服务中心(计量中心) +2
Dynamic probability-based power outage management system
InactiveUS20160241031A1Single network parallel feeding arrangementsAc network load balancingOutage management systemEngineering
A method and system are provided for managing a power system having a grid portion, a load portion, a storage portion, and at least one of a renewable portion and a fuel-based portion. The method includes generating, by a scheduler responsive to an indication of an occurrence of a power outage, an outage duration prediction. The method further includes solving, by the scheduler, an economic dispatch problem using a long-term energy optimization model. The method also includes generating, by the scheduler based on an analysis of the long-term energy optimization model, an energy management directive that controls, for a time period of the outage duration prediction, the storage portion and at least one of the renewable portion and the fuel-based portion. The method additionally includes controlling, by a controller responsive to the directive, the storage portion and the at least one of the renewable portion and the fuel-based portion.
Owner:NEC LAB AMERICA
Economic dispatch method for micro grid based on centralized and distributed double-layer optimization strategy
InactiveCN104779611AReliableSatisfy the scheduling resultSingle network parallel feeding arrangementsWind energy generationPower controllerReal-time data
The invention discloses an economic dispatch method for a micro grid based on a centralized and distributed double-layer optimization strategy. The method is an optimized dispatching method using economical efficiency as an objective under the running state of a single micro grid. The method comprises the following steps: in the centralized-distributed double-layer optimization, a centralized layer corresponds to an advanced optimization process within a predicted period, which is performed based on predicted data of the output power and the load of each uncontrollable unit in the micro grid, and the process of the method is completed by a centralized control center of the micro grid; the distributed optimization corresponds to a real-time optimization process performed based on real-time data of the output power and the micro grid load of each uncontrollable unit of the micro grid at each dispatch time in a predicted period length, and the optimization process is performed in a distributed manner and is completed by a micro power supply controller which is built in each unit of the micro grid. The economic dispatch method disclosed by the invention puts forwards that the economical efficiency of energy storage is not considered, namely the energy storage does not participate in the optimization process of the economical efficiency.
Owner:KAILI POWER SUPPLY BUREAU
Generating method of universality cost space in security-constrained dispatch
InactiveCN101917024AAchieve decouplingCalculation speedSingle network parallel feeding arrangementsElectricity marketPower grid
The invention relates to a generating method of a universality cost space when an electric grid dispatching mechanism draws up generation plans meeting various security constraints, and provides a 'sequence cost space' construction method required by an optimization algorithm, including information of a generation dispatching loading sequence, a constraint adjustment sequence, and the like by summarizing production rules of dispatch and combining an electric power market with an economics theory of energy-saving dispatch. Cost management is cooperated in the process of solving security-constrained economic dispatch, such that the optimization algorithm can universally meet requirements on various generating modes of just, fair and open dispatch, energy-saving dispatch, cost dispatch, electric power market, and the like, and a new solving way is provided for realizing generation resource optimum distribution and large electric grid security constraint, reducing loss of the electric grid and further improving electric transmission and transformation resource. The invention provides a time-saving, labor-saving and universal cost space generation method without needing of carrying out complex mold construction and solution according to the particular case in the security-constrained dispatch.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
A comprehensive energy system day-ahead economic dispatching method
ActiveCN109670730ASolve technical problems with inefficient utilizationGood effectResourcesEnergy system optimizationEnergy coupling
The present invention relates to a comprehensive energy system day-ahead economic dispatching method, by which the technical problem that the comprehensive energy utilization efficiency is low due tothe fact that an existing analysis method takes insufficient consideration of the multi-energy coupling effect of heat, electricity and gas can be solved. The method comprises the following steps of S100, establishing an energy efficiency model with economic benefit maximization as a target to meet the requirements of different users for electricity and heat under supply and demand balance and operation constraint conditions; S200, establishing a model objective function, taking the total profit maximization as an objective function, i.e., the total system cost is subtracted from the energy selling profit, wherein the total cost comprises the operation cost of power supply, heat supply and gas supply, the starting cost and the shutdown cost; S300, establishing a model constraint condition,wherein the model needs to meet two types of constraints of the system operation constraint and the operation constraint of each device; and S400, performing linear conversion on the model. Accordingto the method, the segmented linearization is adopted to carry out conversion solution, a good effect is achieved, and important guidance can be provided for researching comprehensive energy system optimization scheduling adapting to the marketization environment.
Owner:HEFEI POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER
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