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100results about How to "Meet load demand" patented technology
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Heat accumulating type electric heating optimizing operation control method improving wind power absorption
The invention provides a heat accumulating type electric heating optimizing operation control method improving wind power absorption for solving the problems that a wind power heat supply operation manner is simple in our country, and the discarded wind power quantity cannot be flexibly and reasonably matched. The heat accumulating type electric heating optimizing operation control method improving wind power absorption is characterized by comprising the steps of the mechanism of improving wind power absorption through heat accumulating type electric heating, the evaluation index acquisition, operation of a heat accumulating type electric boiler, control analysis of the heat accumulating type electric boiler and the like. According to the operation control method, the requirement for loads of a user can be met, and more discarded wind power quantity can be absorbed; and the heat accumulating type electric heating optimizing operation control method has the advantages of being scientific and reasonable, high in adaptability, capable of fully utilizing energy more effectively, good in effect and the like.
Owner:NORTHEAST DIANLI UNIVERSITY
Distribution network reliability evaluation method considering light storage continuous load carrying capacity
The invention provides a distribution network reliability evaluation method considering light storage continuous load carrying capacity. The method specifically includes the steps of firstly, conducting a clustering analysis on photovoltaic output historical data; then, establishing a photovoltaic output time sequence model under different weather types; and finally, simulating the operating state of a distribution network considering the light storage continuous load carrying capacity through a Monte Carlo method and obtaining a reliability index of the distribution network. The invention is innovative in three aspects: first, taking into account the impact of the time sequence of photovoltaic output on the reliability of the distribution network under the different weather types; second, obtaining an island dynamic division strategy after the failure of the distribution network by calculating the light storage continuous load carrying capacity under a constant confidence level; and third, proposing the distribution network reliability evaluation method considering island operating characteristics.
Owner:SOUTH CHINA UNIV OF TECH
Fan tap position control method, fan tap position control system and air conditioner
ActiveCN104913445AMeet load demandReduce power consumptionMechanical apparatusSpace heating and ventilation safety systemsRefrigerationPower consumption
The invention provides a fan tap position control method, a fan tap position control system and an air conditioner. The fan tap position control method comprises the following steps: judging a work mode of a multi-split air conditioner, wherein the work mode comprises a refrigeration mode and a heating mode; obtaining the energy level coefficients of a plurality of indoor fans so as to determine the load coefficient of an outdoor fan according to the energy level coefficients; obtaining a preset outdoor environment interval-initial tap position mapping table, wherein the preset outdoor environment interval-initial tap position mapping table comprises a mapping relationship between the threshold value interval of a preset outdoor environment temperature value and an initial tap position; judging the preset outdoor environment temperature interval to which the outdoor environment temperature detected in real time belongs to so as to determine the corresponding initial tap position; according to the work mode, the load coefficient and the initial tap position, determining the tap position of the outdoor fan. According to the technical scheme, the load balance of the air conditioner is realized, and power consumption is saved while the load requirements of the indoor fans are guaranteed.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
Charge-discharge-storage integrated station control method based on improved V2G and priority scheduling
ActiveCN107634532ARandom Load Fluctuation SuppressionFix security issuesFlexible AC transmissionAc network load balancingLower limitElectrical battery
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
An economic dispatching method based on double multiplier iterative algorithm for electric-thermal integrated energy system
ActiveCN109345045ARealize real-time computingMeet load demandEnergy industryForecastingElectric heatingLagrange multiplier
The invention provides an economic dispatching method of an electric-heating integrated energy system based on a double multiplier iterative algorithm. The process comprises the following steps: establishing an economic dispatching model of the electric-heating integrated energy system; The Lagrange multiplier method is used to solve the economic dispatching model of electric-heating integrated energy system, which is transformed into an optimal dispatching problem. A double multiplier iterative algorithm is designed to solve the above-mentioned optimal scheduling problem, and the optimal output of each unit under the constrained conditions is found, and the minimum total operating cost under the optimal scheduling of the electric-thermal integrated energy system is calculated. The economic dispatching model of the electric-heating comprehensive energy system of the invention firstly considers the network transmission loss and can realize the real-time calculation; Realized two kinds of electric heating energy coordinated optimization disposition; On the premise of considering the transmission loss of the network, it can meet the two kinds of load demands of the users and reduce the production capacity cost of the enterprise. The double multiplier iterative algorithm proposed by the invention can avoid directly solving the multi-dimensional implicit equations, reduce the complexity of model solution and have a fast convergence rate.
Owner:NORTHEASTERN UNIV
An economical optimal dispatching method for electric-thermal integrated energy system considering transmission loss
ActiveCN109190271AMeet load demandLow production costData processing applicationsEnergy industryIntegrated energy systemEnergy coupling
The invention provides an economical optimal dispatching method for electric-thermal integrated energy system considering transmission loss. The process comprises the following steps: establishing aneconomic optimal dispatching model of the electro-thermal integrated energy system; using the Lagrange function method to analyze the conversion optimization dispatching problem. An iterative algorithm is designed to solve the optimal dispatching problem and the optimal solution is obtained. The optimal value of the economic optimal dispatching model of the electro-thermal integrated energy system, that is, the minimum value of the total cost, is calculated. The invention considers the important influence of the transmission loss on the supply and demand balance of the system and the output optimization of the unit, and considers the electric power network, the thermal pipe network, the electric heating multi-energy coupling, the unit output restriction and the operation restriction many kinds of constraint conditions; on the premise of considering the transmission loss of network, the method can meet the demand of users and reduce the cost of production capacity, so as to improve theeconomic benefits and ensure the safe and stable operation of the system; the fast iterative algorithm is used to convert the quadratic constraint of the electric force equation into affine constraint, which reduces the complexity of the model and has a faster convergence rate.
Owner:NORTHEASTERN UNIV
Microgrid control method employing integrated storage and distribution design
ActiveCN105529712AIncrease or decrease supplyReduce adverse effectsSingle network parallel feeding arrangementsAc network load balancingPower qualityMicrogrid
The invention discloses a microgrid control method employing an integrated storage and distribution design. With energy storage arrays distributed in various microgrids as core control objects, active or reactive automatic balance control of connected microgrid groups is achieved. The microgrid control method comprises the specific steps as follows: in networked and grid-connected states, exchange power constant values are calculated through an energy management module and are distributed to various microgrid control modules; and the microgrid control modules can independently maintain balance of intranet power in an isolated grid state and can cooperate with the energy management module, so that constant value distribution of various distributed power generation units in the networked and grid-connected states is achieved. According to the microgrid control method, mutual aid of power is achieved through a low-voltage and medium-voltage two-stage distribution network between neighboring microgrids free of support of an extranet power supply; the microgrid operation reliability is improved; the microgrids can constantly carry out electromigration among a plurality of working conditions and automatically keep the balance of generated power and electric power; the electric energy quality is improved; the safe electricity utilization requirements are met; clean power generation resources of wind, light and the like are utilized to the maximal extent; and oil and electricity are utilized to the minimal extent, so that pollution to the environment is reduced.
Owner:樊朝晖 +3
Three-pipe heat recovery multi-split air conditioner and outdoor unit thereof
InactiveCN104879852AReduce energy consumptionMeet load requirementsMechanical apparatusSpace heating and ventilation safety systemsVapor–liquid separatorPlate heat exchanger
The invention discloses an outdoor unit of a three-pipe heat recovery multi-split air conditioner. The outdoor unit comprises a compressor, an oil separator, a first heat exchanger and a second heat exchanger, wherein an inlet of the oil separator is communicated with a liquid outlet of the compressor, the first heat exchanger is communicated with a liquid outlet of the oil separator through a first four-way valve, and an outlet pipe of the first heat exchanger is provided with a first throttle part; the first throttle part and the second throttle part are respectively connected with an inlet of a gas liquid separator through a connecting pipe; the outdoor unit is provided with two heat exchangers which can be respectively used as a condenser and an evaporator, the flows of the two heat exchangers can be adjusted through the first throttle part and the second throttle part, the load requirements of a refrigerating room and a heating room can be met, and the best energy distribution effect can be achieved. The invention further provides an air conditioner applying the outdoor unit, which can meet the load demands of the refrigerating room and the heating room, and is low in energy consumption.
Owner:GUANGDONG CHIGO HEATING & VENTILATION EQUIP CO LTD
Control method for double-throughflow air conditioner
InactiveCN109751665AImprove indoor cooling comfortImprove cooling comfortMechanical apparatusLighting and heating apparatusEngineeringRefrigeration
The invention provides a control method for a double-throughflow air conditioner. The control method comprises a detection step, a judgment step and a control step. The detection step is used for detecting indoor environment temperature t and for detecting whether the double-throughflow air conditioner is in a refrigeration mode or a heating mode. The judgment step is used for judging whether theindoor environment temperature t and a preset temperature value T0 meet the relation that t1 error<|t-T0|<=t2 error after the air conditioner is started for preset time. According to the control step,when t1 error<|t-T0|<=t2 error, the rotation speed N1 of a first motor is controlled to be N1max, the rotation speed N2 of a second motor is controlled to be N2min, or the rotation speed N1 of the first motor is controlled to be N1min, the rotation speed N2 of the second motor is controlled to be N2max, wherein N1max is the preset maximum rotation speed of the first motor, N2max is the preset maximum rotation speed of the second motor, N1min is the preset minimum rotation speed of the first motor, and N2min is the preset minimum rotation speed of the second motor. Through the control method,on the premise that the requirement of a room load is met, air-feeling-free air supply enjoyment is really brought to a user, and the comfort level of a human body is increased.
Owner:GREE ELECTRIC APPLIANCES INC
Generated power control system and control method for intelligent micro-grid with medium energy storage function
ActiveCN105470982ASafe and stable operationSuppress power fluctuationsSingle network parallel feeding arrangementsEnergy storageSmart microgridNew energy
The present invention discloses a generated power control system and control method for an intelligent micro-grid with a medium energy storage function. The control system mainly comprises: a wind-solar complementary power generation system, a photothermal generator set with the medium energy storage function, a micro-grid power control system, etc. The control method comprises: by a micro-grid power control center, receiving a power instruction transmitted from a micro-grid dispatching automation system in real time; collecting generated power of the wind-solar complementary power generation system in real time; and calculating a micro-grid optimal power allocation scheme by an energy management system. According to the power allocation scheme, by carrying out coordination control on heat storage of a heat storage system, a heat release rate, and the generated power of the photothermal generator set, stable output of the generated power of the micro-grid is achieved. According to the control method, technical defects of uncontrollability, discontinuity, large fluctuation adn the like of wind energy and solar generated power, which are caused by change of the external environment, can be overcome, the generated power of the micro-grid is stabilized, electric energy of new energy can be consumed to the greatest extent, and the problem of phenomena of ''wind curtailment'' and ''light curtailment'' in the new energy can be effectively solved.
Owner:BEIJING SIFANG JIBAO AUTOMATION +1
Engineering configuration method of independent wind-diesel-storage micro grid system capacity
ActiveCN103166248AOptimizationChoose accuratelyClimate change adaptationSingle network parallel feeding arrangementsSystem capacityModel selection
The invention provides an engineering configuration method of independent wind-diesel-storage micro grid system capacity. The engineering configuration method includes the following steps: A, collecting local actual measurement loads and wind speed history data, and constructing a load and wind speed prediction curve of a whole life cycle according to a timing sequence mode; and B, performing preliminary model selection on a wind generation set, a diesel generation set and an energy storing device according to the curve obtained in the step A, and determining unit capacity and quantity limiting value of each distributed power source. The engineering configuration method of the independent wind-diesel-storage micro grid system capacity can accurately select configuration of the independent wind-diesel-storage micro grid system capacity, optimizes the capacity configuration, provides practical and effective scientific bases for planning and design of independent wind-diesel-storage micro grid system engineering, can reduce power supply cost of a system to the minimum on the premise of satisfying load requirements, and is simple in method and suitable for engineering calculation.
Owner:GUODIAN UNITED POWER TECH
Distribution transformer capacity control method and system
ActiveCN104092215AGuaranteed reasonable useGuaranteed safe operationAc network voltage adjustmentDistribution transformerTemporal change
The invention provides a distribution transformer capacity control method and system. Power using users in a power grid are classified, annular maximum practical coefficients of various users within a collection year limit are respectively sampled and computed, a maximum practical coefficient tendency chart changing with the operation time of distribution transformers is drawn according to the data, the maximum practical coefficients of different distribution transformers within the year limit are looked up, and finally the capacity of each distribution transformer is controlled according to the maximum practical coefficients. In the whole process, man-made subjective participation is avoided, strict data acquisition and computation are adopted, and the result accuracy is ensured, namely accurate capacity control of the distribution transformers can be achieved. In addition, a maximum practical coefficient selecting principle is adopted to ensure that the load demand can be meet and high device utilization rate can be also obtained, and accordingly reasonable utilization of the power grid resources and safe running of the power grid are ensured.
Owner:FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
Method of energy scheduling optimization based on dynamic adaptive fuzzy logic controller
ActiveCN107706932AReduce sensitivityReduce operating costsSingle network parallel feeding arrangementsAc network load balancingFault toleranceFuzzy logic inference
The invention discloses a method of micro grid energy scheduling based on dynamic adaptive fuzzy logic. The method includes the steps of taking one-day prediction information of a micro grid as a training set for generating an optimal fuzzy controller; taking the obtained prediction information as an analog input, and with the dual optimization goal of minimizing the operation cost of the micro grid and minimizing the power fluctuation of a public grid, performing dynamic adaptive design on two aspects, including the shape of a membership function and a fuzzy inference rule, of a fuzzy interference system through a new heuristic optimization algorithm; and further using the obtained optimal fuzzy controller for real-time control of the micro-grid energy management. For one thing, the adaptive optimal controller considers the running information for a period of time and adjusts its own fuzzy inference system according to different environments so that the optimal scheduling of the global time can be realized; and for another, since the fuzzy logic inference has good fault tolerance towards its own imprecise information, the method can effectively avoid the interference of the uncertainty caused by a prediction error.
Owner:ZHEJIANG UNIV
Capacity optimization method for park-level integrated energy system based on investment constraints
PendingCN110086184AEmission reductionMeet load demandLoad forecast in ac networkAc network load balancingDevice typeIntegrated energy system
The invention discloses a capacity optimization method for a park-level integrated energy system based on investment constraints. The method comprises steps that S1, a load type required by a park isdetermined and recorded as a sold energy set, and various types of energy load demands are predicted; S2, a form of externally available energy is determined and recorded as a purchased energy form set; S3, corresponding energy production device and conversion device types are determined and recorded as a device type set; S4, relevant available energy storage devices are determined and listed intoan energy storage device set; S5, an alternative scheme combination set is formed according to a random initialization scheme; S6, a corresponding annualized device investment amount is calculated incombination with the alternative scheme combination set to form a reserved scheme set; S7, the reserved scheme set is screened by utilizing investment constraints to form a reserved scheme set; S8, the reserved scheme set is inputted into a multi-target collaborative optimization model; and S9, the TOPSIS method is utilized to solve an optimal configuration scheme.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Optimizing method for power supply volume of micro gas turbine adopting microgrid under grid-connected mode
InactiveCN102315650AMeet load demandImprove the economy of power supplyEnergy industrySingle network parallel feeding arrangementsMicrogridMathematical model
The invention discloses an optimizing method for the power supply volume of a micro gas turbine adopting a microgrid under a grid-connected mode. The optimizing method comprises the following steps of: (1) classifying power supply modes: classifying the power supply mode of the microgrid under the grid-connected mode into four classes, namely power supply from a large power grid to the microgrid, regenerative distribution type power generation, non-regenerative distribution type power generation and interruptible load IL; (2) quantizing the power supply costs of various power supply modes; and (3) providing a mathematical model for optimizing the power supply volume of the micro gas turbine based on the cooperative optimal theory, wherein the mathematical model is established according to the target of minimizing the summation of the power supply costs from various power supply modes, thereby acquiring the power supply optimizing quantity P(g, t.0) of the micro gas turbine. Therefore, according to the optimizing method disclosed by the invention, on the premise of meeting the load requirement of the microgrid, the characteristic of economic mutual complement of various supply modes for the microgrid under the grid-connected mode is fully utilized, and the relationship among various power supply modes is comprehensively considered so as to improve the power supply economy of the microgrid under the mode and further realize the optimization for the power supply volume of the micro gas turbine.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
A multi-objective optimal dispatching method for power system based on two-level consistency algorithm
ActiveCN109066812ARealize real-time computingImprove representationEnergy industrySingle network parallel feeding arrangementsWeight coefficientElectric power system
The invention provides a multi-objective optimal dispatching method of a power system based on a two-layer consistency algorithm. The process comprises the following steps: establishing a multi-objective optimal dispatching model of the power system; searching for the best condition; designing a two-level consistency algorithm to find out the optimal output of the generator and calculating the minimum value of comprehensive expectation. The invention considers the influence of the transmission loss on the system supply-demand balance and the unit output optimization, and can realize the real-time calculation of the transmission loss. The multi-objective optimization problem is transformed into a single objective optimization problem by using linear weighted sum method. The supply side cansatisfy its own interests by adjusting the weighted coefficient according to the demand of the enterprise. The optimal configuration of electric energy is realized, and the supply side is guided to make a reasonable capacity plan. On the premise of considering the transmission loss, it can meet the user's load demand and improve the economic benefit and social environmental protection benefit of the enterprise. Low dependence on communication and effective protection of enterprise and user privacy, and can achieve plug and play group and effectively respond to network topology changes.
Owner:NORTHEASTERN UNIV
High-step-down-ratio multi-end DC transformer with fault ride-through capability
ActiveCN109830950AHigh Step-Down RatioImprove efficiencyEmergency protective circuit arrangementsDc source parallel operationLow voltageFull bridge
The invention discloses a high-step-down-ratio multi-end DC transformer with a fault ride-through capability. The DC transformer is composed of two converters and is suitable for the interconnection of medium-and-low-voltage DC systems. The front-stage converter is connected with a medium-voltage DC line, is formed by cascaded full-bridge submodules, and realizes step-down and DC fault ride-through functions. The rear-stage converter is composed of a plurality of modules connected in parallel. Each module is composed of a bridge circuit and a high-frequency transformer, and is connected with alow-voltage DC line to realize isolation and voltage stabilization functions to meet different load requirements. When a bipolar short-circuit fault occurs at the medium-voltage side of the DC transformer, a fault characteristic is detected, the front-stage converter of the DC transformer is quickly locked, the reverse voltage is supplied to the DC line, the fault current is quickly reduced to zero, and the DC transformer restores to normal operation after the fault is cleared. In the whole fault occurrence, detection, clearing and recovery process, there is no need to disconnect the DC lineby a DC breaker, which is beneficial to the rapid recovery of the system to complete the bipolar short-circuit fault ride-through and achieve the stable operation of the DC system.
Owner:SOUTHEAST UNIV +2
Power system optimization dispatching method and device, computer device and storage medium
ActiveCN110783963AImprove economyImprove scheduling flexibilitySingle network parallel feeding arrangementsElectric power systemControl engineering
The invention relates to a power system optimization dispatching method and device, a computer device, and a storage medium. According to the power system optimization dispatching method, an objectivefunction and basic constraints are acquired by processing coal-fired unit data and renewable energy unit data; based on a power transmission distribution factor, historical coal power output data, historical output data of renewable energy, and the load rate of each line, safety constraints are established; the safety constraints and basic constraints are used to solve the objective function to acquire the dispatching result; the impact of source and load uncertainty fluctuations on the operation of a power system is determined; when a credible and anticipated accident occurs, the power system can optimize the dispatching based on the dispatching result to improve the dispatching flexibility; the power system can adjust a dispatching strategy based on the dispatching result to meet the load requirements of the system; and the safety and economics of the operation of the power system are taken into account.
Owner:GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
Refrigerant with low GWP value
The invention relates to a refrigerant with a low GWP value, which can substitute R22 and be directly filled to such systems as air-conditioners / heat pumps, etc. The refrigerant comprises propylene and 2,3,3,3-tetrafluoropropene and is prepared by the method of physically mixing the components according to a corresponding proportion in a liquid phase state. The refrigerant provided in the invention completely meets requirements for environment-friendly substitution of R22 at home and abroad at present since the ODP value of the refrigerant is zero and the GWP value is very low; the pressure of the refrigerant is close to that of R22, compression ratio of the refrigerant is smaller than that of R22, exhaust temperature and unit refrigerating capacity of the refrigerant is superior to those of R22, and the properties of the refrigerant are beneficial for long-term operation of a compressor; application of the refrigerant provided in the invention needs no change to equipment or parts of existing R22 refrigerating air-conditioning systems, and the refrigerant is soluble in mineral oil and can be directly filled.
Owner:SHANDONG DONGYUE CHEM
Cascade stage air conditioning system optimization control method based on energy consumption models of water chilling units
ActiveCN110486896AMeet load demandExcellent operating costSpace heating and ventilation safety systemsLighting and heating apparatusCurrent loadSupport vector regression machine
The invention discloses a cascade stage air conditioning system optimization control method based on energy consumption models of water chilling units. The method comprises the following steps that related data of a cascade stage air conditioning refrigeration system are collected, and the ice melting amount and the unit maximum refrigerating load upper limit are estimated; energy consumption model modeling is carried out on a base-load water chilling unit and a double-working-condition water chilling unit in the cascade stage air conditioning refrigeration system by adopting a support vectorregression machine; the actual unit running quantity is calculated according to the estimated ice melting amount, the unit maximum refrigerating load upper limit and the load demand at the current moment, and the unit group control is achieved; the base-load water chilling unit, the double-working-condition water chilling unit and the ice melting amount load are distributed, parameter optimizationis achieved by combining with the energy consumption models of the units so as to enable the operation cost to be the lowest while the current load and boundary conditions are met; and the optimal updating period is set, and re-optimizing is carried out after each period is finished. According to the control method, the operation cost is the lowest while the current load and boundary conditions are met.
Owner:NR ENG CO LTD +1
Unit sliding pressure control optimization method and system based on thermoelectric load condition
ActiveCN112000012AImprove economyWide applicabilitySteam useSafety/regulatory devicesProcess engineeringThermal load
The invention discloses a unit sliding pressure control optimization method and system based on a thermoelectric load condition. The method comprises the steps of S1, establishing a conversion relation model for converting a unit thermal load into an electric load; S2, establishing a mapping model between the thermoelectric load and the main steam pressure optimization value; S3, performing main steam pressure real-time rolling optimization based on the mapping model in combination with actual operation parameters; and S4, outputting an optimization result to a unit control system to control the operation of the unit. According to the unit sliding pressure control optimization method and system based on the thermoelectric load condition, the heat supply amount is taken into consideration,sliding pressure operation strategies of multiple variables such as the thermoelectric load and main steam parameters are comprehensively considered, and thus real-time optimization is conducted.
Owner:浙江浙能绍兴滨海热电有限责任公司 +1
Refrigerant composition with low GWP (Global Warming Potential) value
The invention provides a refrigerant composition with low GWP (Global Warming Potential) value, and the refrigerant composition consists of fluoroethane(R161) and 2,3,3,3-tetrafluoropropene (HFO-1234yf). The preparation method of the refrigerant composition is as follows: physically mixing the components under liquid phase based on corresponding proportions. The refrigerant composition provided by the invention, which has zero ODP (Ozone Deplete Potential) value and quite low GWP value, can be applied to directly replacing R22 in a household air conditioners / heat pump systems and the like.
Owner:SHANDONG DONGYUE CHEM
Multi-stage scene generation electric heating system optimal scheduling method based on wind power consumption
ActiveCN110796373AFlexible and economical operationFully mobilize the enthusiasm of load responseResourcesInformation technology support systemThermodynamicsOptimal scheduling
The invention discloses a multi-stage scene generation electric heating system optimization scheduling method based on wind power consumption, and belongs to the technical field of economic dispatch of an electric heating combined system. The multi-stage scene generation electric heating system optimization scheduling method comprises the steps of generating day-ahead wind power prediction and intra-day and real-time wind power prediction containing prediction errors through a Monte Carlo and roulette selection mechanism on the basis of considering uncertainty of wind power output, determiningreal-time electricity price according to an electric quantity proportion, and constructing an intra-day demand response model. In order to effectively promote the system to consume wind power, a windcurtailment penalty term with the cost dynamically increased along with the wind curtailment amount is constructed. The minimum system cost is used as a target function; and scheduling is carried outby adjusting a conventional unit and a CHP unit before the day; and intra-day scheduling is implemented through a heat accumulating type electric boiler and an intra-day demand response model set based on electric quantity, and unbalanced electric quantity of the real-time market is adjusted through an electric storage device and a unit, and the model is solved through a particle swarm algorithmof dynamic weight, and a reasonable electric-heat joint optimization scheme is obtained.
Owner:FUXIN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER +2
Distributed power source and micro grid hybrid power supply system
ActiveCN105846457AGood effectLow investment costSingle network parallel feeding arrangementsAc network load balancingStored energyPower grid
The invention relates to a distributed power source and micro grid hybrid power supply system, comprising a distribution network to which a distributed power source and a load are connected, and a micro grid connected with the distribution network. The distributed power source and the load are configured outside the micro grid and directly connected to the distribution network. A distributed power source, a load and stored energy in a micro grid constitute a micro grid, which is then connected to a grid. The wiring mode of the power supply system adapts to possible working conditions such as failure and overhaul in the running process, and the running mode can be transformed according to the working condition and is very flexible. While taking into consideration high reliability and other advantages of power supply based on a micro grid, constraints such as cost of investment and control difficulty are considered, and an appropriate micro grid scale is maintained.
Owner:STATE GRID CORP OF CHINA +2
Optimized control method and system for electric heat pump-combined heat and power system
ActiveCN112069734AConducive to coping with subject diversityMeet load demandSingle network parallel feeding arrangementsForecastingProcess engineeringParticle swarm algorithm
The invention provides an optimized control method and system for an electric heat pump- combined heat and power system, relates to the technical field of energy operation. The method can take each unit as a different main body, and performs control by taking benefit maximization of each main body as a target, thereby meeting load requirements of combined heat and power users, and satisfying the each unit main body with the revenue to the maximum extent. The method comprises the following steps: S1, establishing a composition structure framework of the electric heat pump-combined heat and power system, and establishing an output model of each unit; S2, establishing a revenue function model of each unit in the electric heat pump-combined heat and power system; S3, establishing a non-cooperative gaming model of the electric heat pump-combined heat and power system; and S4, solving the gaming model by particle swarm optimization to obtain a combined heat and power scheduling optimizationscheme of each unit. The technical scheme provided by the invention is suitable for the control process of the electric heat pump-combined heat and power system.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Device and method for performing distributed energy utilization on molten salt stored energy
ActiveCN107289664AMeet heating requirementsSave land areaHeat storage plantsEnergy efficient heating/coolingWater sourceLithium bromide
The invention discloses a device and method for performing distributed energy utilization on molten salt stored energy and belongs to the technical field of photo-thermal power generation. The device comprises molten salt heat storage tanks and a steam generator, and the molten salt heat storage tanks are internally provided with electric heaters, drainage pipes and molten salt pumps; the steam generator is provided with a heat source inlet, a heat source outlet, a cooling water inlet and a stream outlet; the electric heaters are connected with electric signal processing equipment through wires; the drainage pipes are connected with the heat source outlet through first pipes, and the molten salt pumps are connected with the heat source inlet through second pipes; the cooling water inlet is connected with a water source through a third pipe; and the steam outlet is connected with a steam turbine, a steam converter, a heating heat supply network and a lithium bromide unit correspondingly through fourth pipes. By means of the device, renewable resources can be effectively utilized, the energy comprehensive utilization rate is high, the occupied area is small, the cost is low, emission of various pollutants is reduced, and good economic and social benefits are achieved.
Owner:深圳众合零碳储能技术有限公司
Method for calculating absorptive renewable energy of electric vehicle based on off-grid micro-grid
InactiveCN107482675AImprove stabilityEfficiencySingle network parallel feeding arrangementsWind energy generationNormal loadFuel cells
The present invention discloses a method for calculating absorptive renewable energy of electric vehicle based on off-grid micro-grid. According to the invention, an electric vehicle is taken as an active load, and a micro-grid model is proposed which comprises a photovoltaic cell, a wind turbine, a micro gas turbine, a fuel cell, a power storage battery, an electric vehicle and a normal load. Through the utilization of the model, the optimal running strategy and the machine group combination are solved so as to realize the minimization of running cost. The micro grid scheduling strategy proposed by the invention allows the access of an electric vehicle and the usage of renewable sources, which can not only save the investment funds into the micro grid and the running and maintaining cost, but can also reduce environmental pollution. In addition, the method can make full use of the electric vehicle as the main load to cut the peak to fill the valley, therefore, making the micro grid more economic.
Owner:SOUTHEAST UNIV
Control method and system of radiant air conditioner
ActiveCN109028403AMeet load demandNo wasteSpace heating and ventilation safety systemsLighting and heating apparatusEngineeringWater temperature
The invention discloses a control method and system of a radiant air conditioner. The control method of the radiant air conditioner comprises the following steps that the environmental load information of the environment where at least one indoor unit connected with an outdoor unit is located is obtained; the water temperature of water needing to be supplied to each indoor unit is determined according to the environmental load information of the environment where the indoor unit is located; the highest water temperature of water needing to be supplied to at least one indoor unit is determinedas a first water supply temperature of a first water chilling unit; the lowest water temperature of water needing to be supplied to at least one indoor unit is determined as a second water supply temperature of a second water chilling unit; and a first water supply quantity of the first water chilling unit and a second water supply quantity of the second water chilling unit are controlled according to the dew-point temperature of the environment where each indoor unit is located, so that the air temperature of the environment where each indoor unit is located is made higher than the dew-pointtemperature of the environment where each indoor unit is located. The method capable of adjusting a water system of the air conditioner according to the load requirement of the air conditioner is provided, and thus, an efficient, low-energy-consumption and anti-condensation operation effect of the air conditioner is achieved.
Owner:浙江国芝科技有限公司
Control method of natural cooling refrigerating system
ActiveCN110736276APrecise control of opening and closingReduce operating loadRefrigeration safety arrangementEnergy regulationFree cooling
The invention discloses a control method of a natural cooling refrigerating system. According to the technical scheme, the control method of the natural cooling refrigerating system is characterized by comprising an energy regulation control device, a natural cooling coil pipe, a heat exchanger, a water chilling unit and a chilled water solution; the energy regulation control device is any one, orany two or all of a linear three-way valve, a variable frequency water pump and a variable frequency draught fan; when the refrigerating system is in a running state, the conditions (1), (2) and (3)are set, and whether the natural cooling coil pipe is opened or not is determined according to the conditions; when the refrigerating system is in a shutdown state and the natural cooling coil pipe isin a closed state, the conditions (4), (5) and (6) are set, and whether the natural cooling coil pipe is opened or not is determined according to the conditions.
Owner:QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
Rail transit refrigeration system and intelligent adjustment method and device thereof
ActiveCN109899935AGuaranteed energy efficiencyImprove comfortMechanical apparatusEfficient regulation technologiesTraffic volumeEngineering
The invention discloses a rail transit refrigeration system and an intelligent adjustment method and device thereof. The method comprises the steps that a load demand in a field after a preset time period in future is estimated, and a deviation between the load demand after a preset time period and a load demand in a current moment field is determined; operating parameters of the refrigeration system is adjusted according to the deviation of the load demand; and according to the target temperature and the return air temperature, obtained after the operating parameters are adjusted, of the refrigeration system, the operating parameters are continuously adjusted to meet the load demand in the field after the preset time period. Therefore, when the flow rate of persons changes rapidly, the operating parameters of the refrigeration system can be adjusted in time according to the deviation of the load demands, and the purpose of improving the user comfort while ensuring energy efficiency isachieved. After the operating parameters are adjusted according to the deviation of the load demands, adjustment can be continuously carried out according to the return air temperature, the delay problem caused by the fact that the refrigeration system is far away from a user area can be solved, so that the adjustment is more accurate.
Owner:GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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