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987results about "Energy industry" patented technology

Real-time monitoring and early warning method and system for variable-frequency energy-saving motor

The invention discloses a real-time monitoring and early warning method and system for a variable-frequency energy-saving motor, and the method comprises the steps: collecting the operation parameters of the motor in real time through a multi-source sensor group disposed on the variable-frequency energy-saving motor; determining a current motor working condition according to the motor operation parameters, and determining a real-time load rate of the motor based on a preset load working condition correlation model; acquiring historical operation data of the variable-frequency energy-saving motor, and generating a dynamic threshold curve according to the historical operation data; generating a dynamic threshold according to the motor operation parameters and the dynamic threshold curve, performing health degree calculation on the variable-frequency energy-saving motor based on the dynamic threshold, and determining a life prediction value of the variable-frequency energy-saving motor according to the health degree; and when the life prediction value of the variable-frequency energy-saving motor is lower than a preset value, automatically triggering a frequency reduction instruction, switching to a field-oriented vector control mode, and synchronously generating an alarm and equipment health file of the variable-frequency energy-saving motor.
Owner:DONGGUAN QUNLI MOTOR CO LTD

Methods and systems for data collection, learning, and streaming of machine signals for analytics and maintenance using the industrial Internet of Things

An industrial machine predictive maintenance system may include an industrial machine data analysis facility that generates streams of industrial machine health monitoring data by applying machine learning to data representative of conditions of portions of industrial machines received via a data collection network. The system may include an industrial machine predictive maintenance facility that produces industrial machine service recommendations responsive to the health monitoring data by applying machine fault detection and classification algorithms thereto. The system may perform a method of predicting a service event from vibration data captured data from at least one vibration sensor disposed to capture vibration of a portion of an industrial machine. A signal in a predictive maintenance circuit for executing a maintenance action on the portion of the industrial machine can be generated based on a severity unit calculated for the captured vibration.
Owner:STRONG FORCE IOT PORTFOLIO 2016 LLC

Customized energy-saving air conditioner control method and device oriented to industrial process requirements

The invention provides a customized energy-saving air conditioner control method and device for industrial process requirements, and is applied to the technical field of data processing. According to the method, electromagnetic interference and vibration noise are eliminated through Kalman filtering, and a standardized process-environment-energy consumption correlation sequence is generated; and converting the three-dimensional process load map into a three-dimensional process load map, and establishing an individualized air conditioner dynamic load prediction model in combination with heat and humidity characteristics of a scene through fluid dynamic simulation and self-adaptive grid division. Extracting process priority factors to construct an adjustment matrix, calculating an air conditioner parameter combination under target energy consumption, extracting energy consumption characteristics, dividing standard exceeding risk levels, and constructing a multi-dimensional characteristic matrix; and comparing real-time data with historical data to identify abnormity, and generating an energy consumption optimization correction factor. Users are grouped according to enterprise conditions, key factors are screened by using a gradient boosting tree, a personalized energy-saving control model is constructed by fusing multiple information, target parameters are output, and a real-time adjustment instruction and a time-phased energy-saving strategy are generated in combination with a time sequence.
Owner:CLP ZHIWEI (SHANGHAI) TECH CO LTD +1

Intelligent building energy-saving processing control method and system

The invention provides an intelligent building energy-saving processing control method and system, and relates to the technical field of industrial automation. The method comprises the following steps: dividing a factory into a plurality of areas, and collecting operation data and energy consumption data of production equipment; constructing a digital twin model comprising an equipment energy consumption physical model and a production process logic model, and establishing an initial energy consumption benchmark; generating a cross-regional scheduling scheme through a hierarchical control architecture, inputting the scheduling scheme into a digital twinborn model for simulation, dynamically adjusting an energy consumption reference and scheduling parameters according to a simulation result, and verifying whether an energy-saving index meets a preset threshold value or not; deploying the optimized scheduling scheme to a physical factory, controlling equipment start-stop and operation parameters through an automatic control system, and updating a digital twin model and an energy consumption benchmark based on real-time feedback data; accurate management and control, efficient scheduling and dynamic optimization of intelligent building production energy consumption are realized, the energy consumption cost is effectively reduced, and the service life of equipment is prolonged.
Owner:CHONGQING YUTE MINING CO LTD

On-site monitoring system for performance of elastic loose type anchorage system suitable for deep-sea buoys

The invention discloses an on-site monitoring system for the performance of an elastic loose type anchorage system suitable for deep-sea buoys, and particularly relates to the field of deep-sea monitoring. The on-site monitoring system auxiliary comprises a central processing module, wherein the output end of the central processing module is separately connected with an information display module,an information storage module, an auxiliary recovery module and a driving module, and the input end of the central processing module is separately connected with a power supply module, a monitoring module, a correction module and a positioning module. According to the on-site monitoring system for the performance of the elastic loose type anchorage system suitable for the deep-sea buoys, the auxiliary recovery module is arranged, air bags are installed at a plurality of node positions on the anchorage system, a booster pump in a pressurization unit is used, outside air is conveyed into a floating ball unit through a pipeline unit, so that the retractable air bags are enabled to bulge upwards to float, the whole anchor system is directly floated in sections, people conveniently recycle theanchorage system greatly, the workload during the recycling process is reduced, and the practicability is high.
Owner:OCEAN UNIV OF CHINA

Compressor energy-saving operation control method and system based on reinforcement learning

The invention provides a compressor energy-saving operation control method and system based on reinforcement learning, and belongs to the technical field of compressor control. The method comprises the steps that multi-dimensional data in the operation process of a compressor are collected through a multi-parameter sensor network; preprocessing the multi-dimensional data to obtain target feature data; inputting the target characteristic data into a state prediction model, and predicting an operation parameter prediction value in a future control period; splicing and fusing the target feature data and the operation parameter predicted value, and constructing state representation of the reinforcement learning model; inputting the state representation into a target reinforcement learning model based on a near-end strategy optimization framework to obtain an optimal control action; safety verification is conducted on the optimal control action based on preset compressor safety operation constraints, and an execution instruction is determined; and adjusting operation parameters of the compressor based on the execution instruction. According to the compressor energy-saving operation control method and system based on reinforcement learning, the energy-saving performance and the operation stability of the compressor are improved.
Owner:BEIJING JERRYWON ENERGY EQUIP CO LTD

Efficient multi-stage waste heat recovery and reutilization combined heat and power generation system

The invention relates to the technical field of heat energy recovery, in particular to an efficient multistage waste heat recovery and reutilization combined heat and power generation system which comprises a heat output calculation module, a temperature difference mode analysis module, a heat exchange efficiency analysis module, an optimal parameter identification module, a condenser management module and a condensate water recovery control module. According to the method, temperature, flow and pressure data of multiple positions are collected in real time, the heat fluctuation trend under multiple input conditions is accurately predicted, a basis is provided for follow-up optimization decision making, and through dynamic prediction of a temperature difference mode, the heat exchanger inlet and outlet temperature and the mutual relation between multiple equipment working parameters are combined, so that the heat exchange efficiency is improved. Real-time evaluation of the heat exchange efficiency is achieved, construction of a working model of a heat exchanger is combined, optimal working parameters under multiple temperature gradients are accurately recognized, optimization of working parameters of a condenser and condensate water recovery equipment is combined, the energy utilization rate of the combined heat and power generation system is increased, energy consumption is reduced, and resource waste is reduced.
Owner:LIANYUNGANGZE HEATING CO LTD

Large reciprocating compressor continuous stepless regulation system and method based on intelligent control

The invention provides a large reciprocating compressor continuous stepless regulation system and method based on intelligent control, and the method comprises the steps: building a continuous stepless regulation model according to a load change trend and process fluctuation characteristics, and determining an initial parameter set of a regulation instruction through a preset load range regulation threshold value and a dynamic response speed requirement; according to the non-equilibrium stress adjustment scheme, dynamically adjusting operation parameters of a compressor execution mechanism, monitoring the abrasion state of key components through a real-time feedback control technology, and determining operation data of the components after stress equilibrium; and the operation data of the parts after stress balance are obtained, the operation parameters of the compressor are subjected to secondary calibration through an intelligent control system in combination with an energy efficiency improvement target, and the optimized optimal pressure ratio state parameters are obtained.
Owner:XINJIANG HUIAN ENERGY CO LTD

Full-bridge LLC resonant converter control circuit

The utility model provides a full-bridge LLC resonant converter control circuit, which is characterized in that a full-bridge LCC resonant converter is provided with a frequency conversion controller, a phase shift controller and a mode switching module, the input end of the mode switching module is connected with an input voltage detection module, and when the input voltage of the full-bridge LCC resonant converter is lower than a preset threshold value, the phase shift controller is connected with the mode switching module. When the input voltage of the full-bridge LCC resonant converter is larger than or equal to a preset threshold value, the variable frequency controller controls a switching tube in the full-bridge LCC resonant converter to work through switching of the switch, and when the input voltage of the full-bridge LCC resonant converter is larger than or equal to the preset threshold value, the phase shift controller controls the switching tube in the full-bridge LCC resonant converter to work through switching of the switch. The full-bridge LLC resonant converter has the advantages that the variable-frequency controller and the phase-shift controller are arranged in the control circuit at the same time, switching of control modes can be achieved based on judgment of the magnitude of input voltage and through a simple switching circuit, the full-bridge LLC resonant converter has the advantages of variable-frequency control and phase-shift control, and the problems of voltage fluctuation and instability are solved.
Owner:MAINTENANCE BRANCH OF STATE GRID CHONGQING ELECTRIC POWER

Brushless direct current motor efficient control method and system based on FOC algorithm

The invention belongs to the technical field of industrial control, and particularly relates to a brushless direct current motor high-efficiency control method and system based on an FOC algorithm, and the method comprises the steps: superposing high-frequency sine disturbance in a voltage instruction, extracting a response component, achieving the online identification of the equivalent impedance of a motor, and dynamically solving and updating the estimated values of resistance and inductance; and correcting d-axis and q-axis voltage feed-forward items in real time by using the updated parameters, and correspondingly adjusting a current loop proportion and an integral gain. The method can adapt to the time-varying characteristics of motor parameters in an industrial field, so that the accuracy of feed-forward compensation and the stability of current loop bandwidth are effectively guaranteed, and the robustness and the control precision of a control system under complicated industrial working conditions such as variable temperature and variable load are remarkably improved; and the requirements of high-end industrial equipment on high performance and high reliability of the motor driving system are met.
Owner:HANGZHOU QIRUN ELECTRONICS CO LTD

Self-adaptive dynamic pressure regulating and energy saving system and method based on pneumatic equipment

The invention relates to the technical field of industrial automation, and discloses a self-adaptive dynamic pressure regulation energy-saving system and method based on pneumatic equipment, and the system comprises a state monitoring module which is used for constructing an operation state matrix of the pneumatic equipment; the pressure control module is used for generating a dynamic pressure control vector of the pneumatic equipment; the risk judgment module is used for calculating a real-time operation risk coefficient of the pneumatic equipment; the hierarchical regulation and control module is used for establishing a hierarchical regulation and control strategy set of the pneumatic equipment; the control feedback module is used for generating a self-adaptive control parameter sequence of the dynamic voltage regulation instruction and the state early warning instruction; and the scheme output module is used for integrating the dynamic pressure regulating instruction, the state early warning instruction, the hierarchical regulation and control strategy set and the self-adaptive control parameter sequence and outputting a self-adaptive dynamic pressure regulating and energy saving scheme of the pneumatic equipment. The energy utilization efficiency and the operation stability of the pneumatic equipment can be improved.
Owner:HARBIN SAISI TECH CO LTD

Energy and low-carbon cooperative regulation and control method and system based on reinforcement learning

The invention discloses an energy and low carbon cooperative regulation and control method and system based on reinforcement learning, and relates to the technical field of energy management and low carbon control, and the method comprises the steps: building an initial data set through real-time collection of energy consumption data, carbon emission data and key operation parameters in industrial production; preprocessing the data by adopting a multivariable correlation analysis and data standardization technology; constructing a dynamic optimization model based on a reinforcement learning algorithm, and adaptively adjusting operation parameters of production equipment by taking energy utilization efficiency maximization and carbon emission minimization as targets; and a closed-loop feedback mechanism is established, the regulation and control effect is monitored in real time, model parameters are optimized, and continuous efficient low-carbon operation of the system is ensured. The technical problem that energy efficiency and environmental protection are difficult to collaboratively optimize in a traditional industrial energy management method is solved, and the method is suitable for intelligent low-carbon production in high-energy-consumption industries such as chemical engineering and metallurgy.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY

Control method and system for energy efficiency optimization of air conditioning system of constant-temperature and constant-humidity factory workshop

The invention discloses a control method and system for energy efficiency optimization of a workshop air conditioning system of a constant-temperature and constant-humidity factory. The control method comprises the steps that a load prediction model is trained, and the constant-temperature and constant-humidity factory is partitioned to set importance weights for all air conditioners; based on a reinforcement learning algorithm, multi-objective optimization is carried out on an air conditioning system composed of all air conditioners, the reinforcement learning algorithm takes adjustment of operation parameters of all the air conditioners as actions, and the actions of each iteration and environment parameters, detected in real time, of a constant-temperature and constant-humidity factory workshop are input into a load prediction model; the predicted cold load, the predicted heat load and the predicted dehumidification amount of each air conditioner are obtained, and the performance coefficient of each air conditioner is calculated; and weighting the performance coefficient of each air conditioner according to the importance weight, and constructing a reward function for multi-objective optimization by combining a weighting result and the environment parameters, detected in real time, of the constant-temperature and constant-humidity factory workshop. According to the invention, the optimal optimization of the constant-temperature and constant-humidity factory among the lowest energy consumption, the most stable control and the highest precision is realized.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD SUZHOU BRANCH

Water vapor single-screw compressor testing system

A steam single-screw compressor testing system is characterized in that the steam single-screw compressor testing system is composed of a steam pocket (5) and a liquid-gas separator (3), an electric heater (12) and an inverted-T-shaped steam distribution mixer (13) are installed in the steam pocket (5), and the steam pocket (5) is communicated with a steam single-screw compressor (1) through a steam return pipeline (6); the steam single-screw compressor (1) is communicated with a gas inlet of the liquid-gas separator (3) through a high-pressure steam outlet pipeline (2), high-pressure steam separated by the liquid-gas separator (3) is communicated with a gas inlet of the inverted-T-shaped steam distribution mixer (13) installed in the steam pocket through a low-pressure steam pipeline (4), and the bottom of the inverted-T-shaped steam distribution mixer (13) is located below the waterline of the steam pocket (5). And small holes are fully distributed, so that high-temperature steam and water in the steam pocket are uniformly mixed for heat transfer, and heat energy is recycled. The air conditioner is simple in structure, the compressor is started without electric heating, and energy and water resources are saved.
Owner:NANJING CARBON RECYCLE BIOMASS TECH CO LTD

Intelligent valve management and control platform based on Internet of Things

The invention provides an intelligent valve management and control platform based on the Internet of Things, and relates to the technical field of industrial automation control, and the intelligent valve management and control platform based on the Internet of Things comprises a data collection module, an edge calculation module, an Internet of Things communication module, a cloud platform management module, an intelligent diagnosis module and a self-adaptive control module. Through a mode of combining multi-source sensor data acquisition, edge calculation and cloud intelligent analysis, real-time monitoring of a valve state, accurate prediction of a fault and self-adaptive optimization of a control strategy are realized, compared with a traditional valve control system, the problems of response lag, high maintenance cost, data isolation and the like are effectively solved, and the system is suitable for large-scale popularization and application. The method can be widely applied to multiple industrial fields such as petroleum, chemical engineering and water affairs, the automation level, production efficiency and safety of industrial production are remarkably improved, the operation cost of enterprises is reduced, and the method has wide application prospects and huge economic value.
Owner:SHIFANG HUIFENG OIL PROD MASCH CO LTD +1

Micro-grid on-grid and off-grid state detection method and system capable of resisting step disturbance influence

The invention discloses a step disturbance influence resistant micro-grid on-grid and off-grid state detection method and system, and the method comprises the steps: carrying out the filtering and normalization processing of a discrete time sequence, and obtaining a standard signal; identifying mutation points in the standard signal, and constructing a mutation point index set; screening out a point column meeting a time closeness feature from the mutation point index set, and constructing a continuous candidate section; performing stability analysis, monotonicity judgment and fallback trend identification on each continuity candidate section to judge whether the continuity candidate section is a step change section or not; whether a real continuous pulse sequence is formed or not is judged according to the time interval, the amplitude change rate and the amplitude peak-valley characteristic for the remaining sections excluding the step change section in the continuous candidate sections; and outputting the disturbance type of each continuity candidate section. According to the method, the accuracy of disturbance identification and the robustness of system control are improved, and the operation safety and the control decision reliability of the system under the complex disturbance background are guaranteed.
Owner:STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Energy-saving control system and method based on air compressor operation state analysis

The invention discloses an energy-saving control system and method based on air compressor operation state analysis, and relates to the technical field of air compressor energy-saving control. The system comprises the following components: a data acquisition module, a data processing module, a virtual twin model construction module, an energy-saving control strategy test module, a scheme evaluation and optimization module and an actual control execution module. According to the method, the virtual twin model of the air compressor system is constructed, the operation states under different energy-saving control strategies are simulated in the meta-cosmic space, the energy-saving effects of various strategies can be rapidly and accurately evaluated, the energy-saving control strategies are continuously optimized through the scheme evaluation and optimization module, and the energy-saving effect of the air compressor system is improved. And finally, the optimal energy-saving control strategy is determined and applied to an actual control system, the energy-saving effect and the operation efficiency of the air compressor are improved, and the energy consumption and the operation cost are reduced.
Owner:SHENZHEN YONGJIE ELECTROMECHANICAL EQUIP CO LTD

Integrated control method and system for efficient and energy-saving industrial automation product

The invention relates to the field of automation control, and discloses an integrated control method and system for an efficient and energy-saving industrial automation product, and the method comprises the steps: firstly obtaining the historical energy consumption data of automation equipment of a target industrial product, recognizing an abnormal point to determine a basic control mode, and constructing an energy consumption optimization process according to the basic control mode; the method comprises the steps of determining an optimal operation mode and generating an energy-saving operation strategy according to energy consumption efficiency of different process links, then evaluating energy consumption performance under different working conditions, finding out energy consumption bottlenecks and occurrence conditions, constructing a dynamic adjustment mechanism, generating an adjustment task list and extracting detailed adjustment tasks, and finally analyzing an energy-saving target and identifying hindering factors. And generating an energy consumption control scheme based on the production feedback data. The control efficiency of the industrial automation system can be improved.
Owner:横川机器人(深圳)有限公司

Heat recovery and utilization system and micro-pressure steam heat energy unit

The utility model discloses a heat recovery and utilization system and a micro-pressure steam heat energy unit, and an efficient heat energy recovery and reutilization loop is constructed through equipment such as an evaporator, a screw compressor, a condenser, an expansion valve and a flash tank. The evaporator absorbs heat from heat source water and evaporates a refrigerant into low-pressure gas, then high-temperature hot water is generated through the compression and condensation process, meanwhile, the flash tank is used for converting the high-temperature hot water into micro-pressure steam so as to meet the requirement for low-pressure steam in the system, by efficiently recycling and utilizing waste heat, the dependence of the system on external steam and electric power is reduced, and the energy consumption of the system is reduced. Therefore, energy efficiency is improved, operation cost is reduced, and energy waste and environmental influence are reduced.
Owner:SHENZHEN YOUDE GREASE ENG TECH

Energy efficiency prediction method and system based on three-phase asynchronous motor

The invention relates to an energy efficiency prediction method and system based on a three-phase asynchronous motor. According to the method, an equivalent circuit model based on a motor physical mechanism is constructed, and theoretical current and ideal loss are generated to serve as benchmark references; voltage and current signals of actual operation of the motor are collected in real time, and vector subtraction is carried out on actually measured current and theoretical current to obtain difference current signals; blind source separation processing under physical constraint is applied to the difference signal, independent components representing different physical loss sources are decoupled, and additional power of the independent components is quantified; and the ideal loss, the additional loss and the output power are fused to realize dynamic accurate prediction of the real-time energy efficiency of the motor. According to the scheme, through the synergistic effect of differential driving and a physical mechanism, penetrability diagnosis of loss roots such as power grid interference and mechanical degradation is achieved, and the self-adaptive precision of energy efficiency prediction under variable working conditions is improved more remarkably.
Owner:PANZHIHUA GANGCHENG GROUP

Air compressor unit energy-saving scheduling optimization method and system based on SSA-LSTM dynamic load prediction

The invention provides an air compressor unit energy-saving scheduling optimization method and system based on SSA-LSTM dynamic load prediction, and relates to the technical field of industrial energy efficiency management. The method comprises the following steps: decomposing gas load data to perform characteristic analysis; firstly, parameters with physical significance are qualitatively screened based on the working principle of the air compressor, and then multi-dimensional parameters are selected as input through Pearson correlation coefficient analysis; in combination with shipyard production data characteristics, LSTM is adopted to carry out dynamic load prediction, SSA optimization hyper-parameters are introduced, and an SSA-LSTM load prediction model is constructed; sSA-LSTM load prediction is taken as key input, constraint conditions of multiple time scales of air compressors are integrated, and an air compressor unit optimization scheduling model is systematically constructed. According to the method, the space-time heterogeneity and the dynamic fluctuation characteristics in the working condition data are effectively captured through the SSA-LSTM model, efficient global tuning is realized, and the prediction precision and the calculation efficiency are remarkably improved; the method is suitable for a high-dynamic, real-time and accurate load prediction industrial scene represented by a shipyard, and provides key support for scheduling decision making.
Owner:SHANGHAI JIAOTONG UNIV +1

Universal energy-saving and stable air supply control method for air compression system of iron and steel plant

The invention relates to the technical field of steel plant air compression, and discloses a steel plant air compression system universal energy-saving and stable air supply control method which comprises the following steps that S1, the total air consumption demand Q of a steel plant compressed air pipe network is monitored in real time; s2, executing a load segmentation control strategy based on the total gas consumption demand Q; s3, loading and unloading operation of the power frequency air compressor and rotation speed adjustment of the variable frequency air compressor are controlled in a coordinated mode through a central energy-saving control unit; and S4, a pressure buffer tank is arranged on an output pipeline of the variable-frequency air compressor and used for stabilizing the pressure of the pipe network. The total air consumption demand Q is divided into two sections, the power frequency machine is started and stopped according to the N + 1 principle, and the frequency converter is supplemented for continuous quantity supplement, so that the system can operate only with the minimum necessary unit in any load scene, energy waste caused by over-start and over-stop in a traditional scheme is avoided, and overall reduction of compressed air production energy consumption is realized.
Owner:JIANGSU JINCAN ENERGY TECHNOLOGY CO LTD

Integrated power production and storage systems

A power plant is configured to output power to a grid power system and comprises a hydrogen generation system configured to produce hydrogen, a gas turbine combined cycle power plant comprising a gas turbine engine configured to combust hydrogen from the hydrogen generation system to generate a gas stream that can be used to rotate a turbine shaft and a heat recovery steam generator (HRSG) configured to generate steam with the gas stream of the gas turbine engine to rotate a steam turbine, a storage system configured to store hydrogen produced by the hydrogen generation system, and a controller configured to operate the hydrogen generation system with electricity from the grid power system when the grid power system has excess energy and balance active and reactive loads on the grid power system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.
Owner:MITSUBISHI POWER AMERICAS INC

Micro-grid distributed secondary voltage control method and system based on voltage constraint

The invention discloses a microgrid distributed secondary voltage control method and system based on voltage constraint, and relates to the technical field of microgrid control. The method comprises the following steps: establishing a secondary voltage control model of the distributed generator; designing an event trigger function according to the continuous voltage amplitude information of the generator, and determining a corresponding event trigger mechanism; designing a voltage constraint projection scheme, performing load rate adaptive constraint on the voltage amplitude by considering the dynamic change of the load rate, and projecting the voltage amplitude of the distributed generator into a voltage constraint range by adopting a constraint projection function; and designing a distributed secondary voltage controller based on the voltage constraint projection scheme, and performing secondary voltage control on the micro-grid. Through a dynamic event triggering mechanism and a distributed cooperative control strategy and in combination with a constraint voltage projection technology, the bus voltage is quickly recovered to a reference value under a constraint condition, and the communication frequency is remarkably reduced.
Owner:SHANDONG UNIV

Intelligent factory building energy optimization control method and system based on big data analysis

The invention provides a smart factory building energy optimization control method and system based on big data analysis, and the method comprises the following steps: comprehensively deploying sensors: deploying sensors in each region of a factory building, including a production workshop, a warehouse, an office area, a lighting system, a ventilation system and various energy consumption devices, and collecting energy data; according to the method, sensors are widely deployed in various areas and various devices of the factory building, the situation that a traditional method only depends on limited sensors to obtain part of key position data is changed, energy related data including device operation state parameters and the like can be comprehensively collected, and therefore the energy use condition of the whole factory building can be comprehensively mastered; a high-speed data acquisition system and a stable transmission network are utilized to acquire and transmit data to a data center in real time, so that the timeliness of the data is ensured, a manager can know the energy use dynamic state in real time, and the defect that real-time monitoring cannot be carried out in a traditional method is overcome.
Owner:SUZHOU YANGJI ELECTROMECHANICAL ENG CO LTD

Thermal energy storage system with steam generation system including flow control and energy cogeneration

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.
Owner:RONDO ENERGY INC

Production line vacuum pump energy-saving control method based on vacuum degree feedback and PI algorithm

The invention belongs to the technical field of vacuum pump control, and relates to a production line vacuum pump energy-saving control method based on vacuum degree feedback and a PI algorithm. A stability index is constructed based on the vacuum change rate, the effective deviation and the vibration intensity to divide the system state, and the proportion and integral gain of the PI algorithm are dynamically adjusted according to the system state, the effective deviation and the temperature influence coefficient, so that the control parameters can adapt to different states and temperature interference of the system. The problem of response lag or overshoot of a traditional fixed parameter PI algorithm during working condition fluctuation is solved, and the working condition adaptability is improved; and finally, overshoot is avoided by adjusting an integral term, energy efficiency optimization constraints are superposed, and on the premise that surge and temperature safety threshold values are met, unnecessary high-frequency operation is limited, and redundant energy consumption under a stable working condition is reduced.
Owner:SICHUAN RUICHUANG XINDA TECHNOLOGY CO LTD

Control method and device, controller, computer readable storage medium and microgrid

The invention provides a control method and device, a controller, a computer readable storage medium and a micro-grid, and is applied to the technical field of micro-grids, so as to improve the power angle stability after a certain branch in the micro-grid breaks down. The control method can be executed through a controller in the micro-grid. The controller can firstly obtain a plurality of simplified branch transient power transmission capability indexes corresponding to a plurality of branches of the micro-grid. And then, when the duration that the minimum value in the transient power transmission capacity indexes of the plurality of simplified branches is smaller than a preset index threshold value is longer than a preset duration, controlling the network construction type energy storage to execute emergency control operation. Wherein the emergency control operation comprises a first operation and a second operation. The first operation is to reduce the amplitude of the output voltage frequency and the amplitude of the output voltage phase of the grid-forming energy storage. And the second operation is to reduce the output power of the network construction type energy storage. On the basis, the power angle stability after a certain branch in the micro-grid breaks down can be improved through control over network-forming type energy storage.
Owner:HUAWEI DIGITAL POWER TECH CO LTD +1

100kW-level low-rotating-speed composite-structure energy-saving motor and driving control method

The invention relates to the field of motor control, and discloses a 100kW-level low-rotating-speed composite-structure energy-saving motor and a driving control method, and the method comprises the steps: firstly, detecting the rotor rotating speed, stator current, bearing temperature and vibration signals of the motor in real time through a sensor module; a data analysis module calculates change values of the rotating speed of the rotor in a plurality of continuous monitoring periods, accumulates the change values to obtain a comprehensive fluctuation ratio, and compares the comprehensive fluctuation ratio with a preset fluctuation ratio threshold interval; then, the current running state of the motor is judged according to a comparison result; the motor operation states comprise stable operation, overload operation and light load operation; finally, if the motor is in the stable operation state, the current driving parameters are maintained; if the motor is in the overload operation state or the light-load operation state, the current driving parameters are adjusted until the motor is in the stable operation state, and therefore the motor driving parameters are dynamically monitored and adjusted to maintain the motor in the stable state.
Owner:JIANGSU SHENGNAN ELECTRONIC TECH CO LTD