Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

33 results about "Two time scale" patented technology

Coordination and optimization control method for multi-energy complement comprehensive energy system

ActiveCN107290968ARealize layered collaborationAchieve optimizationAdaptive controlControl layerAutomatic control
The invention discloses a coordination and optimization control method for a multi-energy complement comprehensive energy system, optimization control for comprehensive energy system cooling heating and power energy flow is realized through a hierarchical regulatory mechanism, wherein a scheduling optimization layer serves operation cost minimization as a target, according to system operation constraint conditions, cooling heating and power load requirements are combined to perform current plan optimization, according to the current load plan obtained by the scheduling optimization layer, a coordination control layer combines current operation condition of the system to obtain a real-time cooling heating and power load instruction, and the coordination control layer transmits the instruction to an automatic control system of equipment relative to the comprehensive energy system through a real-time control layer. According to the invention, coordination dispatching and control of the comprehensive energy system in current and real time can be realized, negative influences for system optimization caused by energy demand uncertainty and load prediction error are eliminated, economic operation of the comprehensive energy system is realized, so that energy utilization rate of the system is improved.
Owner:NR ELECTRIC CO LTD +1

Multi-time scale rolling micro-grid energy optimization management method

The invention discloses a multi-time scale rolling micro-grid energy optimization management method. Firstly, two time scales are divided, the intra-day optimization aims at the minimum of the operating cost and the system network loss, the constraints of start, stop and operation of each distributed power supply are taken as constraints, and at the same time, a mathematical model for intra-day optimization is established in consideration with three load response costs and the constraints. The real-time optimization uses the intra-day optimization result as a reference, and the rolling optimization solution in the future finite time domain is performed by using a model prediction control algorithm. The method can comprehensively consider the constraints of various distributed power supplies and various load characteristics to ensure the safe and stable operation of a micro-grid, at the same time, considers the power consumption and improves the operating economic efficiency of the micro-grid.
Owner:YANSHAN UNIV

Optimal scheduling model of micro-energy grid with multi-energy storage under multi-time scales

ActiveCN109088442AEffective response powerDealing with Errors EffectivelySingle network parallel feeding arrangementsEnergy storageEnergy balancingDaily operation
The invention discloses an optimal scheduling model of a micro-energy grid with multi-energy storage under multi-time scales, which relates to the field of energy internet optimization operation. Themicro-energy network comprises three energy forms of electricity, heat and gas, including P2G equipment, a heat and power co-generation micro-combustion engine, an electric boiler, a gas boiler, an accumulator, a heat storage tank and a gas storage tank. The multi-time scale considers two time scales, one hour before the day and 15 minutes within the day. The process of establishing the optimal scheduling model of the micro-energy grid comprises the following steps: 1, determining the component parameters and the network parameters of the micro-energy network; 2, establishing an hour-level optimized dispatch model before that day of the micro-energy grid; 3, establishing a micro-energy grid intra-day 15-minute level optimal scheduling model. The invention effectively deals with the power fluctuation of the renewable energy and the load prediction error on the premise of ensuring the daily operation energy balance of each energy storage device, and improves the absorbing capacity of themicro-energy grid to the wind power and the photovoltaic.
Owner:STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY +1

Feedback control method for fuzzy time delay state of uncertainty time-delay two-time scale systems (UTDNTTSSs)

The invention provides a feedback control method for the fuzzy time delay state of uncertainty time-delay two-time scale systems (UTDNTTSSs), and belongs to the technical field of high-precision control of complex systems. According to the method, based on an uncertainty standard disperse fuzzy singular perturbation model, a fuzzy time-delay state feedback controller is designed, and high-precision control over the complex UTDNTTSSs is achieved. Fuzzy logic, a singular perturbation technology and a time delay and uncertainty system theory are fused, the uncertainty standard disperse fuzzy singular perturbation model of the controlled UTDNTTSSs is established, combining with the fuzzy logic and a time-delay system theory, the fuzzy time-delay state feedback controller is designed, a spectral norm and LMIs method is adopted, it is deduced that sufficient conditions exist in the controller, high-precision control simulation is conducted through a CE150 helicopter attitude control system, and the specific implementation process and the effectiveness of the method are shown. The feedback control method for the fuzzy time delay state of the UTDNTTSSs has the advantages of solving the problem that in the existing modeling and control method of the UTDNTTSSs, steady state errors caused by time delay, quick modality and parameter perturbation can not be removed, and the control performance of the UTDNTTSSs is greatly improved.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND

Method for aligning section raw data on basis of double time scale delay evaluation

The invention relates to a method for aligning section raw data on the basis of double time scale quantitative evaluation measurement point delay and performing prediction and modification. By the method, multi-source section raw data with different delay can be aligned. According to data delay differences among different regions, different stations and different transmission types, the method comprises the following steps of: quantitatively evaluating delay time of each measurement point by using sampling sequences with two time scales; predicting and modifying the current numerical value through an autoregression-sliding average model; evaluating the precision grade of the numerical value and a delay distribution interval; and providing for a state estimator. By the method, the data delay of different measurement points can be quantified accurately; the current section numerical value of the measurement point can be predicted and modified according to the delay; and precision weightis endowed, so that the aligned multi-source real-time data is integrated into a section closer to the operation condition of the current power grid.
Owner:NORTHEAST CHINA GRID +1

Method for dispatching multi-time-scale energy of micro power grids on basis of real-time electricity price mechanisms

The invention discloses a method for dispatching multi-time-scale energy of micro power grids on the basis of real-time electricity price mechanisms. The method for dispatching the multi-time-scale energy of the micro power grids on the basis of the real-time electricity price mechanisms includes day-ahead dispatching time scales and intra-day dispatching time scales. Priority dispatching strategies are connected with the day-ahead dispatching time scales and the intra-day dispatching time scales, and robust optimization problems can be solved for multiple time scales of the micro power gridsby particle swarm optimization algorithms. The method has the advantages that requirements of the real-time electricity price mechanisms can be met, the method is applicable to peak and valley time-of-use electricity price systems and includes concise steps, real-time and definite dispatching priority can be provided for various distributed power sources in the micro power grids in each dispatching time frame, renewable energy can be sufficiently utilized, wind and light abandoning can be reduced, and the load power supply reliability can be improved; dispatching strategies on the basis of real-time electricity price information and multi-time-scale theories are combined with one another, accordingly, intra-day dispatching guiding effects of day-ahead dispatching can be enhanced, coordination and matching of dispatching of two time scales can be promoted, and burden due to short-time-scale dispatching can be relieved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Image display device

A device for displaying in vivo images picked up inside a subject in a time series. The device automatically detects lesion images contained in all in vivo images picked up over the time series. The device displays an elongated display area having a time scale assigned along a longitudinal direction thereof and an indicator which moves along the time scale to indicate a time position in the time scale which corresponds to a current in vivo image currently displayed in a main display area. In response to a detection of the lesion image, the device makes pixels located at a time position in the elongated display area which position corresponds to the lesion image to emit light in a predetermined pixel-display mode. The display mode of the indicator is controlled in response to information on a lesion that is possible to be contained in the current in vivo image.
Owner:OLYMPUS CORP

Method for two time-scales video stream transmission control

A method for two time-scales video stream transmission control is proposed, which mainly includes the following three steps. Firstly, a model-based long time-scale bandwidth trend extraction step is proposed to calculate a current bandwidth through a Transmission Control Protocol (TCP) throughput model, and predict a trend of network bandwidth by using an Exponential Smooth Model (ESM) according to the calculated current bandwidth. Secondly, a short time-scale bandwidth fluctuation detection step is proposed to divide a network status into three categories and according to different network statuses, additively increase or multiplicatively decrease the estimated bandwidth. Thirdly, a target bit rate adjustment step based on two asymmetrical thresholds is proposed to set an up-threshold and a down-threshold of bandwidth to avoid frequently adjusting a target bit rate of an encoder. The method can satisfy the requirements of TCP-friendliness, real-time, and smoothness for the video transmission.
Owner:BEIHANG UNIV

Method for predicting daily water consumption of urban dweller

The invention discloses a method for predicting the daily water consumption of urban residents. Based on the detailed data of residents' domestic water consumption, the data is merged according to the time period type of residents' domestic water consumption, and according to the merged water use data, the time scale is calculated according to the hour and day. Two time scales are used to predict the domestic water consumption of urban residents and achieve better results. The present invention can simulate and analyze residents' domestic water consumption, and can provide residents with services such as water consumption forecasting and step-by-step water price prompts; on the other hand, by predicting the daily water consumption of all users in a certain area, it can provide microscopic water supply for water supply enterprises. Scheduling provides an auxiliary decision-making basis, thereby reducing water supply energy consumption, and at the same time reducing the leakage rate of the pipe network which is proportional to the water supply pressure.
Owner:GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI

Networked control method for nonlinear two-time-scale system (NTTSS) with random packet loss

The invention discloses a networked control method for a nonlinear two-time-scale system (NTTSS) with random packet loss, and belongs to the technical field of networked control of a complex system. By fusing fuzzy logic, a singular perturbation technique and a random system theory, the method comprehensively considers the nonlinear two-time-scale coexistence characteristic of a controlled system and the random packet loss problem caused by network communication under a unified model framework, a discrete fuzzy singular perturbation model of the networked NTTSS is established, and a random fuzzy state feedback robust control method is disclosed. The network control method has the advantages that the problem that system unstability or steady-state errors caused by a fast variable of the complex two-time-scale system cannot be eliminated in an existing network control method is solved, and the networked control performance of NTTSSs is greatly improved.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND

Method for quantitatively analyzing intermittent energy synergistic effect based on time domain

ActiveCN104866978AClear reciprocal dampening effectResourcesNew energyClassification methods
The invention discloses a method for quantitatively analyzing intermittent energy synergistic effect based on a time domain, and belongs to the technical field of new energy power-generation grid-connection. The method comprises the following steps: analyzing intermittent energy long-term synergistic effect from two time scales of years-months and days based on related coefficients; determining an intermittent energy daily output fluctuation characteristic classification method based on fuzzy classification; computing two intermittent energy synergistic effect indexes: the intermittent energy synergistic effect related coefficient and an intermittent energy synergistic effect fluctuation index; analyzing intermittent energy years-months and days scale synergistic effect according to the intermittent energy synergistic effect related coefficient; and analyzing intermittent energy short-term synergistic effect based on the intermittent energy synergistic effect fluctuation index. The synergistic effects of the intermittent energies are analyzed from the time scales in different levels to determine the relevance and complementary between the intermittent energies, and the theoretical basis and guidance are provided for the power network planning containing a high permeability intermittent energy regional power grid.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1

Image display device, image display method and image display program

An image display device by which an image pickup position of a selected image can be easily estimated from a display screen. The image display device is provided with a display part for displaying a series of time-series picked up images of a desired object, and a control part. The control part controls the display part to display a time bar which has a time scale indicating an image pickup period of the series of images and controls the display part to display an indicator for indicating a position on the time scale corresponding to a time the selected desired image is picked up from the series of images.
Owner:OLYMPUS CORP

Fault parameter estimation method based on unscaled Kalman filter with two time scales

The invention discloses a system fault parameter estimation method based on a dual-time scale unscaled Kalman filter, which comprises the following steps of: discretizing a system state space equationof an electric walking vehicle system to obtain a time-discretized system state space equation; adding parameters to be estimated to system state variables to obtain an augmented system state space equation, wherein the parameters to be estimated are parameters in a fault set; an unscaled Kalman filter algorithm with two time scales being used to estimate the parameters and the state variables ofthe original system, In the macro-scale, only the original system state variables before augmentation are estimated by unscented Kalman filter, and in the micro-scale, the augmented system state variables being estimated by the unscented Kalman filter. The invention solves the problems of poor real-time fault diagnosis and delayed fault source positioning, reduces the calculation amount when fault diagnosis is performed, and improves the operation efficiency.
Owner:HEFEI UNIV OF TECH

Space manipulator track rolling planning method based on vision measurement

The invention relates to a space manipulator track rolling planning method based on vision measurement. The vision sensor measured data updating period differs from a bottom layer interpolation periodgreatly; firstly, upper layer planning is carried out based on vision sensor measured information; secondly, lower layer planning of a motor layer is carried out based on the upper layer planning result, and the space manipulator track planning is alternatively carried out in a rolling manner in two time scales; and a space manipulator is guided by the vision sensor measured information to move to be in expected configuration, it can be guaranteed that the space manipulator moves continuously and stably, advantages are created for stable imaging of a vision sensor conveniently, and the success rate of space operation tasks is improved.
Owner:BEIJING INST OF CONTROL ENG

Two-time-scale-based user-side energy management method

ActiveCN107147115ALoad Power Consumption OptimizationReduce the impact of volatility in power generationAc network load balancingAc network with energy trading/transmission rightsCharge dischargeLoad regulation
The invention provides a two-time-scale-based user-side energy management method, which can be simultaneously applicable to fluctuation of distributed power generation equipment and demands of power generation, power purchase, power selling, power utilization, energy storage and load regulation of a user, also has low complexity and is easy to operate. A user side comprises the distribution power generation equipment, a load and energy storage equipment, a two-time scale comprises a large time slot and a small time slot, and the large time slot comprises K small time slots. The method comprises the steps of building a total utility function of the user under the large time slot, optimizing load power utilization quantity of the user in the large time slot, service electric quantity and charge-discharge electric quantity of energy storage equipment by taking the optimal total utility function of the user as a target, and regulating the load in the small time slot according to a forecast error of the charge-discharge electric quantity of the energy storage equipment so that the fluctuation of power generation quantity of the distributed power generation equipment is offset, wherein the forecast error is difference between a forecast value and an actual value of the charge-discharge electric quantity of the energy storage equipment in the small time slot.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Image display device, image display method and image display program

An image display device by which an image pickup position of a selected image can be easily estimated from a display screen. The image display device is provided with a display part for displaying a series of time-series picked up images of a desired object, and a control part. The control part controls the display part to display a time bar which has a time scale indicating an image pickup period of the series of images and controls the display part to display an indicator for indicating a position on the time scale corresponding to a time the selected desired image is picked up from the series of images.
Owner:OLYMPUS CORP

Active balance control performance evaluation method based on electric power system reliability

The invention discloses an active balance control performance evaluation method based on electric power system reliability. The method comprises steps that safety frequency requirements are determined; adequacy frequency requirements are determined; evaluation indexes are designed. According to the method, a new adequacy index, namely frequency loss expect is constructed, a deviation degree and probability of electric power system frequency after an accident are quantitatively described to reflect influence of accident disturbance on power supply capability of an electric power system; adequacy and safety requirements of the electric power system are both considered, long-term (a range from a month to a year) and short-term (minute-level) time scales are employed, the accumulation off-limit time and the continuous off-limit time of the frequency are respectively limited, in combination with the safety adequacy index, through theoretical derivation, analysis expressions of the evaluation indexes are acquired, long-term and short-term frequency fluctuation situation situation requirements under a stable state are realized, and complete theoretical bases are realized.
Owner:DALIAN UNIV OF TECH

Method for observing ammonia coverage rate and storage capacity of diesel engine series SCR system

ActiveCN108386262AEffective estimated coverageEstimated Storage EffectivelyInternal combustion piston enginesExhaust treatment electric controlChemical reactionAmmonia storage
The invention discloses a method for observing the ammonia coverage rate and storage capacity of a diesel engine series SCR system, and belongs to the technical field of tail gas treatment. The methodcomprises the steps that a state space model is established firstly according to a main chemical reaction in the series SCR system and is simplified into a single state space model; on the basis, theammonia coverage rate and the total ammonia storage capacity of the surface of an average catalyst of two SCR reaction tanks are estimated by using an EKF algorithm; and finally, the ammonia coveragerates and storage capacity of the two reaction tanks are estimated correspondingly by using a two-time-scale method, and thus the purpose of reducing the calculating load is achieved. According to the method for observing the ammonia coverage rate and storage capacity of the diesel engine series SCR system, the ammonia coverage rate and storage capacity on the surface of the catalyst can be estimated effectively and simultaneously, and a basis is provided for subsequent controller design; and the two-time-scale method is adopted, the calculation time of the algorithm is effectively decreased,and the method is applied to the practice more advantageously.
Owner:BEIHANG UNIV

Multi-time scale coordinated voltage reactive power control method

The invention provides a multi-time scale coordinated voltage reactive power control method. A voltage is adjusted by different response speeds of a plurality of voltage reactive power control equipment and by two time scales, the two time scales are coordinated by a two-stage power loss forecast model, and the total expected power loss is reduced as well as the voltage limitation on different time scales are met. A safety voltage level is maintained under the condition that a load changes and regenerative energy power output fluctuates, and the total expected power loss can be reduced.
Owner:JIANGSU FRONTIER ELECTRIC TECH +2

Control architecture suitable for medium-low voltage DC power distribution and utilization system

The invention relates to a control method suitable for a medium-low-voltage DC power distribution and utilization system. The method comprises three control layers: optimal control for the top layer,unified control for the intermediate layer, and distributed autonomous control for the bottom layer. The method comprises the following steps: 1) taking optimal control as the top layer control: achieving the optimal control in energy management, and providing a reliable scheduling instruction for a system control center, wherein the input data comprises prediction data, the real-time operation state information of the adjacent AC power distribution systems and the real-time operation state information of the medium-low voltage DC power distribution and utilization system; the output data of the energy optimization management is scheduling data and comprises voltage and power reference points and control parameters; and the internal functions of the energy optimization management comprisethree parts, namely reference point optimization, control parameter optimization and two time scale coordination strategies; 2) taking unified control as the intermediate layer control; 3) taking distributed autonomous control as the bottom layer control.
Owner:TIANJIN UNIV +2

Optimizing and dispatching method for microgrid economical operation on basis of multiple time scale coordination

The invention discloses an optimizing and dispatching method for microgrid economical operation on the basis of multiple time scale coordination, comprising the following steps: dividing microgrid economical operation into two time scales, namely a dayahead plan and real-time dispatching; in the dayahead plan, dividing one dispatching period into a plurality of time intervals, and modelling into a mixed integer linear programming program based on the dayahead prediction data; and during the real-time dispatching period, complying with the startup and halt result of the dayahead plan, and modelling into a nonlinear plan based on real-time ultra-short term prediction data. In the optimizing and dispatching method, the coordinated mechanism of two time scales is designed, the dispatching scheme obtained with the method not only can satisfy the economic factors of a long time scale but also can satisfy safe operation constraints, such as the inner microgrid voltage, carrying capacity and the like of short time scales, and the capacity fluctuation of new energy is smoothened. The method is suitable for optimizing and dispatching economical operation in the parallel and single network operation of a micro power grid composed of a controllable power supply, an uncontrolled power supply and energy storage equipment of any type and any volume proportion.
Owner:ZHEJIANG UNIV

A method for quantitative analysis of intermittent energy synergies based on time domain

ActiveCN104866978BClear reciprocal dampening effectResourcesNew energyClassification methods
The invention discloses a method for quantitatively analyzing intermittent energy synergistic effect based on a time domain, and belongs to the technical field of new energy power-generation grid-connection. The method comprises the following steps: analyzing intermittent energy long-term synergistic effect from two time scales of years-months and days based on related coefficients; determining an intermittent energy daily output fluctuation characteristic classification method based on fuzzy classification; computing two intermittent energy synergistic effect indexes: the intermittent energy synergistic effect related coefficient and an intermittent energy synergistic effect fluctuation index; analyzing intermittent energy years-months and days scale synergistic effect according to the intermittent energy synergistic effect related coefficient; and analyzing intermittent energy short-term synergistic effect based on the intermittent energy synergistic effect fluctuation index. The synergistic effects of the intermittent energies are analyzed from the time scales in different levels to determine the relevance and complementary between the intermittent energies, and the theoretical basis and guidance are provided for the power network planning containing a high permeability intermittent energy regional power grid.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1

Optimal dispatching model of micro-energy grid considering multiple energy storage in multiple time scales

The invention discloses an optimal dispatching model of a micro-energy network considering multiple energy storages under multi-time scales, and relates to the field of optimized operation of the Energy Internet. The micro-energy network includes three energy forms of electricity, heat and gas, including P2G Supply-type micro-gas turbines, electric boilers, gas boilers, batteries, heat storage tanks, and gas storage tanks; multi-time scales consider the two time scales of 1 hour before the day and 15 minutes within the day, and the establishment process of the optimal scheduling model of the micro energy network includes The following steps are as follows: step 1, determine the component parameters and network parameters of the micro energy network; step 2, establish the optimal scheduling model of the micro energy network at the level of 1 hour before the day; step 3, establish the optimal scheduling model of the micro energy network at the level of 15 minutes within the day. The present invention effectively copes with renewable energy power fluctuations and load prediction errors under the premise of ensuring the daily operating energy balance of each energy storage device, and improves the ability of the micro energy network to accommodate wind power and photovoltaics.
Owner:STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY +1

Multi time zone clock

The invention discloses a multiple-time-zone clock. Time scale on the clock surface of the multiple-time-zone clock is distributed on a circle with a first distance away from the center of the clock surface, an hour hand of the multiple-time-zone clock is in the shape of a disc with a second radius, and the second radius is smaller than the first distance. The disc shaped hour hand is provided with at least two indicate zones, each indicate zone is provided with a cover plate which has an identical color with the disc shaped hour hand, and the indicate zones have different colors from that of the disc shaped hour hand, wherein an include angle between two radiuses of any two indicate zones is any multiple of 30 degrees. By utilizing the technical scheme of the invention, the multiple-time-zone clock can indicate the time of multiple time zones on the same clock surface clearly and effectively.
Owner:王昌懿
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products