63 results about "Power coupling" patented technology

The application discloses a new energy base phase modifier synchronous instability analysis method and system, and belongs to the technical field of power system stability analysis. The method comprises the following steps: obtaining a training data set covering multi-dimensional power grid parameters and fault scenes, calculating dominant degree factors based on the coupling dynamic index of inverters, and dividing multiple dominant degree factor intervals to represent the control dominance of different types of inverters; a risk guardrail set containing a power coupling index and a damping ratio change amount is constructed, and a differentiated threshold is set for each interval; the control parameters of the inverters are extracted and a candidate boundary line set is generated, the performance of the candidate boundary line set is evaluated through transient simulation, the priority value is calculated by comprehensively considering the deployable proportion, the time benchmark ratio and the safety coefficient, and the optimal target boundary line is selected; finally, the target boundary line parameters are mapped into adaptive control gears, and the coordinated control of the phase modifier and the inverter is realized in combination with the real-time risk state, so that the synchronous instability risk is effectively inhibited.

The application discloses a coal-fired power plant water-heat-chemical value-added system for a new power system and an intelligent flexible operation method thereof. The system comprises a coal-fired generator unit, a heat-steam-power coupling subsystem, a water-hydrogen-oxygen coupling subsystem and a carbon-chemical coupling subsystem integrated with the coal-fired generator unit, and is uniformly coordinated by an intelligent collaborative control unit. Solid particle storage flue gas waste heat can be used to quickly produce steam injection into a steam turbine to improve the frequency modulation response speed of the unit. Low-valley electricity is used to electrolyze hydrogen, and by-product oxygen is recycled. Hydrogen and captured carbon dioxide are used to synthesize green methanol to realize carbon resource utilization. Methanol synthesis reaction heat and electrolysis waste heat are recovered in stages. The operation method can intelligently switch and cooperate between fast frequency modulation, hydrogen production by electrolysis and methanol synthesis according to grid instructions and real-time electricity prices, so that the flexibility of the unit, resource utilization and comprehensive benefits are systematically improved.

The application discloses a kind of mine electricity coupling multi-stage collaborative progressive scheduling method and system, constructs the process network model of ore flow and power flow coupling, abstracts "node-connector" structure and "push-pull" interactive mechanism;According to the multi-stage collaborative progressive scheduling framework of "week before-day before-intra-day", a multi-time scale optimal scheduling model is established;Prioritize the controllable load in the multi-time scale optimal scheduling model, form a multi-round hierarchical load flexible control strategy for the ore mining and dressing process;Based on the multi-time scale optimal scheduling model, generate week before plan, day before plan;Through real-time simulation system, the multi-stage collaborative progressive scheduling strategy is verified.The application establishes mine electricity collaborative progressive scheduling method, realizes the effective connection of multi-time scale and real-time closed-loop control and "mine determines electricity-mine electricity interaction-electricity adjusts production" whole-chain collaborative optimization, effectively improves the stability and economy of mine operation.

The application discloses a source network load storage intelligent coupling system based on new energy photovoltaic, which comprises a support and a power coupling mechanism. The power coupling mechanism comprises a coupling seat, a retaining assembly and a triggering assembly. The triggering assembly is provided with a triggering seat, a first pressing piece, a second pressing piece, a limiting piece and a driving piece. The source network load storage intelligent coupling system based on new energy photovoltaic limits the position of the electric conductor by the triggering assembly and the retaining assembly, so that the electric conductor needs to be moved upward and rotated before being forced to move, thereby avoiding the electric connection between the electric conductor and the electric terminal due to accidental touch, and accidents. By the retaining assembly and the triggering assembly, the position of the electric conductor can be limited, so that other actions are required before closing, thereby providing safety guarantee for the later maintenance and cleaning operation of the photovoltaic panel, preventing accidental operation and other irrelevant personnel from easily closing, and reducing the occurrence of dangerous accidents to a certain extent.

The application relates to the technical field of electric automobile power drive control, and discloses a high-speed energy-saving drive system based on motor alternate starting and stopping and group power battery rotation, which comprises a vehicle controller, two or more drive motors, independent motor controllers, a power coupling disengaging mechanism and group power batteries; when the vehicle enters a high-speed driving working condition, the vehicle controller controls the entry into an alternate driving mode: only one motor works at the same time, and the remaining motors are powered off and mechanically disengaged to eliminate the drag loss; the motors are rotated according to a period, a temperature or an efficiency threshold value; the group power batteries are one-to-one corresponding to the motors and are synchronously rotated to supply power, so that the battery discharge rate is reduced; the system makes the motor keep operating in a high-efficiency interval, reduces the continuous large-current discharge loss and heating, thereby reducing the power consumption of the vehicle in high-speed driving, improving the real high-speed endurance, and automatically switching to multi-motor parallel driving in complex working conditions such as sudden acceleration and climbing, so that the energy saving and power performance are considered.

This utility model's electric mining truck gearbox features a three-speed design that allows selection of the most suitable gear based on different working conditions, optimizing power output to meet the power requirements of mining trucks, increasing the coverage of the motor's high-efficiency zone, improving the overall efficiency of the gearbox, and effectively reducing energy consumption. Based on the powerful performance provided by the multi-motor configuration, it enhances the flexibility and efficiency of the drive system. The front intermediate shaft assembly is coaxially connected to the output end of the power coupling assembly, and the rear intermediate shaft extends into the front intermediate shaft assembly and is coaxially aligned with the output end of the power coupling assembly, forming a compact parallel shaft structure. This fully utilizes the radial space of the gearbox and reduces its axial dimensions, thereby reducing the gearbox's volume and facilitating overall vehicle layout. Furthermore, the front and rear intermediate shaft assemblies share the radial and axial loads during transmission, reducing gear stress and improving the transmission stability and reliability under harsh working conditions, thus enhancing the gearbox's adaptability to various operating conditions.

The application discloses a hybrid transmission, which comprises an engine, a transmission input shaft, a transmission intermediate shaft, a transmission output shaft, a first motor and a second motor, the engine is connected with the transmission input shaft, the transmission input shaft is a solid shaft, the first motor is connected with a first transmission mechanism, the second motor is connected with the transmission output shaft through a second transmission mechanism; the first transmission mechanism is selectively coupled with the transmission input shaft through a first power coupling mechanism; the hybrid transmission adopts the solid input shaft, which can greatly reduce the machining cost of the shaft system; the transmission coupling structure of the first motor is arranged, the system structure is simplified, the integration and assembly cost is reduced, the motor no-load drag loss is eliminated through the decoupling power coupling design, the double power sources are independently selected, the engine and the motor can always work in the high-efficiency interval, and the optimal energy consumption in all working conditions is realized; the application further discloses a hybrid vehicle and a control method of the hybrid transmission.

This invention belongs to the technical field of integrated travel gearbox and superstructure reduction gearbox, specifically relating to a power coupling and shift power holding control method and system for a loader. This invention monitors and calculates the load power of the travel system and superstructure system in real time, and dynamically decides on the coupling and decoupling of power flow by comparing it with the maximum power thresholds of their respective motors. When the travel power is insufficient and the superstructure power is abundant, the clutch is engaged to achieve power convergence; when the conditions are not met, the clutch is disengaged to allow the system to operate independently. During gear shifting, the clutch is forcibly engaged to maintain continuous power output to the output shaft using the superstructure power. This invention intelligently distributes power according to operating conditions, maximizing the power utilization of the dual motors. Through power compensation during gear shifting, operational smoothness and efficiency are improved. The system can adaptively switch between independent and coupled modes, combining flexibility and reliability.

The application provides a double-power coupling type wind and steam complementary power generation device, relates to the technical field of wind power generation devices, and comprises a generator set, a wind power generation device is installed at the top of the generator set, the wind power generation device comprises a mounting rod, a gear box is fixed at the top of the mounting rod, connecting shafts are arranged at the two ends of the gear box, a first fan blade is arranged at the front end of the gear box, and a second fan blade is arranged at the rear end of the gear box, a sleeve frame is fixed at the positions of the first fan blade and the second fan blade corresponding to the connecting shafts, and the sleeve frame is sleeved on the connecting shafts, and an opening is arranged at the upper end of the sleeve frame, compared with the prior art, the two groups of fan blades can be used alternately, one group of damaged fan blades is disassembled and sent to the lower part for maintenance, and the other group of fan blades is used for replacement, so that the continuous operation of the wind power generation device is maintained, high-temperature compressed gas is sent into the steam power generation device through a compression assembly, the consumption of fuel is reduced, and power generation is jointly completed.

The application discloses a combined photovoltaic energy storage system, and belongs to the technical field of solar power generation and energy storage. The system comprises a photovoltaic input module, a high-frequency isolation power conversion module, an energy storage battery module, a grid-connected inverter output module and a control module. The high-frequency isolation power conversion module internally comprises a three-winding high-frequency transformer, realizing magnetic coupling power transmission and electrical isolation between three ports of photovoltaic input, energy storage battery and grid-connected output. The three-winding transformer has preset leakage inductance between each winding, and forms LC filter circuits with corresponding capacitors, filtering high-frequency ripples and suppressing harmonics. The control module monitors the state of each module in real time and dynamically adjusts the switching frequency and phase shift angle. The application fundamentally solves the power coupling interference and fault propagation problem in the traditional DC coupling scheme through the three-port high-frequency isolation topology, and has the advantages of high integration, high efficiency and good safety.

The application provides an electro-hydraulic composite recycling integrated hoist system, comprising: an assembly controller, a transmission assembly, a first electric drive assembly, a second electric drive assembly, a hydraulic drive assembly, a sensing assembly, an electric control handle, and a load arranged on the hoist reducer; the system adopts an electro-hydraulic composite drive system, uses a power battery as a power source of the hoist system to meet the national energy-saving and emission-reducing development requirements, simultaneously uses a motor to drive a variable hydraulic pump or uses an accumulator to complete power input of the variable hydraulic pump motor, and power output of the variable hydraulic pump motor and power output of a motor generator are coupled to realize electro-hydraulic composite drive hoisting; the electro-hydraulic composite drive hoist system utilizes high power density output of the variable hydraulic pump motor in the hydraulic power system, utilizes high energy density of the power battery and good control characteristics of the motor generator in the electric power system, and can better control lifting movement of the hoist drive system.

Embodiments of the present application disclose a comprehensive energy system optimization method, device, equipment and medium, wherein the method comprises: determining at least one candidate position of a heat storage tank in a comprehensive energy system; the candidate position is located between two heat supply pipelines in a heat supply network of the comprehensive energy system; determining a target function of the comprehensive energy system in a preset time period; the target function comprises a total cost of operation of the comprehensive energy system; and determining an optimization scheme of the comprehensive energy system based on each candidate position, at least one constraint condition and the target function. Through the execution of the technical scheme provided by the embodiments of the present application, complementary utilization of the heat network and the heat storage equipment can be realized, thereby changing the matching curve of the heat and power load, relieving the heat and power coupling relationship of the combined heat and power unit, expanding the flexible adjustment space of the system, improving the consumption level of wind energy, and reducing carbon dioxide emissions.

This utility model belongs to the field of vehicle drive technology, and in particular relates to a multi-input / output coupling mechanism for a fuel cell hybrid tractor. The structure includes a fuel cell (24), a DC / DC unidirectional converter (25), a second motor (26), a planetary gear system, a hydraulic system, a drive axle (30), a brake (18), a clutch (5), a first motor (22), and a power battery (23). This utility model combines a continuously variable transmission (CVT) device and a power coupling device. The CVT device and the power coupling device share a planetary gear system. The planetary gear system can both change speed and achieve power coupling, reducing transmission links, saving manufacturing costs, saving vehicle space, and improving energy utilization.

This invention discloses a downhole docking wireless power coupling mechanism, comprising a magnetic coupling coil assembly, coaxially nested inner and outer cylinders. A magnetic coupling coil assembly is fixed to the inner wall of both the outer and inner cylinders. The magnetic coupling coil assembly includes a coil, radial magnetic cores, and axial magnetic cores. Multiple axial magnetic cores, equally spaced along the circumference, are fixed to the inner and outer cylinders respectively. A coil is fixed to the inner side of each inner and outer cylinder, surrounded by corresponding axial magnetic cores. Multiple radial magnetic cores, arranged radially along the coil's direction, are arranged on the opposite end faces of the coils in the inner and outer cylinders. This invention alters the magnetic circuit topology of the coupling mechanism, reducing radial space occupation and weight, and decreasing the sensitivity of coupling performance to strict coaxial alignment of the transmitting and receiving ends. It also changes the distribution of the alternating magnetic field in the vicinity of the cylinder, suppressing eddy current losses.

The application discloses a parameter matching method, device and equipment of a hybrid power system and a vehicle. The hybrid power system at least comprises an engine, a first motor, a second motor, a power battery and a power coupling mechanism. The method comprises the following steps: determining the rated power of the second motor based on a braking energy recovery working condition; determining the maximum demand driving power of the vehicle based on a limit climbing working condition; determining the minimum driving power of the engine in a driving mode according to the rated power of the second motor and the maximum demand driving power of the vehicle; obtaining the average demand power required by the vehicle running based on a development process; and determining the rated power of the first motor and the rated power of the engine according to the average demand power. The optimal vehicle configuration is obtained by obtaining different parameters, so that the vehicle performance is ensured.

A linear electromechanical system comprising: a stator comprising at least a first stator electronic circuit and a second stator electronic circuit or circuit set; a free piston mover movable in a reciprocating manner relative to the stator. The free piston comprising: a piston surface; a transducer configured such that an electromagnetic force is applicable on the free piston mover by one or more of the stator electronic circuits or one or more of the circuit set; and one or more transducer electronic circuits. The system further comprising a switching device for each of the first stator electronic circuit and the second stator electronic circuit or each of the circuit set, such that the current in each of the first stator electronic circuit and the second stator electronic circuit or each of the circuit set is independently controllable, and wherein at least one of the transducer electronic circuits is configured to receive power from at least one of the independently controllable stator electronic circuits or at least one of the circuit set during at least part of a stroke of the free piston mover.

A cable swivel for inductive power couplings for powering pool or spa components is provided. A swivel component allows a power cable to a pool or spa component, such as an electric pool cleaner, to swivel when the inductive power couplings are coupled together. The couplings include a first inductive coupling that can be positioned within and / or mounted into a wall fitting, a second inductive coupling that inductively couples with the first inductive coupling, and a swivel component attached to the second inductive coupling for allowing the second coupling to swivel with respect to the first inductive coupling. A retainer ring engages with the wall fitting and retains the first and second couplings and the swivel component in position within the wall fitting.

The application provides a control method and device for a power converter of an energy storage system, a coupling relationship between active power and reactive power is analyzed through a power outer loop control model based on a virtual synchronous machine and a power coupling coefficient matrix, PI parameters of a reactive voltage compensation channel are adjusted based on the coupling relationship and a fundamental component extracted, a voltage reference value output by a PI controller after correction is obtained, a current value in a prediction time domain is predicted through a model-free predictive control method based on a bias format dynamic linearization in a current inner loop, and the voltage reference value and the current value are optimized in combination with an intuitionistic fuzzy model and a rough decision model, so that a target voltage reference value and a target current value generated after optimization are used for regulation and control. Therefore, through fusion of power decoupling, model-free predictive control, fundamental component extraction, and the intuitionistic fuzzy model and the rough decision model, adaptability, robustness and power quality of the power converter in a complex power grid environment are improved.

The utility model discloses a kind of sampling devices for coalfield geological exploration, comprising: metal cylinder, the top of the metal cylinder is threadedly connected with screw cap, two handles are fixed symmetrically outside the screw cap, sampling hole is provided in the bottom side of the metal cylinder, sampling collection piece is fixedly installed in the inside of the metal cylinder, sampling collection groove is provided in the outside of the sampling collection piece, the sampling collection groove is communicated with sampling hole, the outside of the metal cylinder is provided with scale line;Sampling plugging structure, slidingly installed in the inside of metal cylinder, and cooperate with sampling hole, sampling hole is plugged when not using.This device is through low friction transmission, dynamic plugging, composite power coupling and so on innovative design, realizes the integrated operation of efficient drilling, accurate depth control, leakproof collection in the process of coalfield geological sampling, significantly improves the sampling reliability and operation efficiency under complex geological conditions, while reducing maintenance cost.

The application discloses a coal furnace mixed coal parameter determination method, device and equipment, wherein the method comprises the following steps: obtaining historical power plant operation data and historical coal type data; based on the historical power plant operation data and the historical coal type data, a coal power coupling model for representing the mapping relationship between the coal quality parameters and the coal furnace performance indexes is trained; current power grid operation data and current coal furnace operation data are obtained, and based on the current power grid operation data and the current coal furnace operation data, a constraint condition is constructed; a target function is constructed based on the coal furnace performance indexes, a mixed coal parameter determination model is constructed based on the target function, the coal power coupling model and the constraint condition, the mixed coal parameter determination model is solved, and the target mixed coal parameter corresponding to the coal furnace on the power plant side is determined; and the target mixed coal parameter is used for representing the mixed coal proportion of different coal types. Through the above method, the mixed coal parameter can be quickly and accurately determined, and the power grid peak regulation demand can be adapted.

The application discloses a two-stroke free piston engine, which comprises two opposite cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, and a piston connected through a push rod, wherein the swing gear is engaged with a rack on the push rod, the swing gear is connected with the first power output through the first one-way clutch and connected with the second power output through the second one-way clutch, and the piston makes a linear reciprocating motion once to form a first stroke and a second stroke in sequence, and in each stroke, one cylinder works and the other cylinder compresses to ensure the output power of each stroke, and the power of the two power outputs is coupled and then outputted as continuous power through a transmission unit. Thus, the complex transmission mechanism formed by the push rod, the crankshaft and the like in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in the rotary form is outputted, and the engine efficiency is improved.

This invention relates to the technical field, specifically to a cathode-enclosed air-cooled fuel cell stack system and method for hydrogen-powered two-wheeled vehicles. The system includes an anode hydrogen supply assessment module to generate a hydrogen supply status number, a cathode channel concentration identification module to determine the channel segment sequence, a surface temperature path extraction module to obtain the diffusion path number, a power deviation quantification module to generate power coupling characteristics, a stack operation status characterization module to classify operation characteristic results, and an operation status closed-loop intervention module to send adaptive adjustment commands and complete coordinated control. This invention constructs a multi-dimensional hydrogen supply status characterization based on pressure fluctuations and amplitude levels, combines oxygen concentration differences along the path with surface temperature diffusion paths, couples gas reaction distribution with heat transfer direction, introduces power output levels to achieve a structured description of the operation status, and integrates multi-source parameter change trends to correct the adjustment amplitude, achieving coordinated matching of hydrogen supply and heat dissipation, and improving operational continuity and stability.

The application discloses a door opening mechanism and an electrical appliance. The door opening mechanism is installed on an appliance body and comprises a driving device, a door opening part, a first coupling part and a second coupling part. The driving device comprises a motor and a rotating part which are coupled. The door opening part is coupled with the rotating part and reciprocates between a recovery position and an ejection position under the driving of the rotating part. The first coupling part is arranged at the rotating center of the rotating part. The second coupling part is arranged on one side of the rotating axis of the rotating part and is coupled with the first coupling part. A controller is electrically connected with the motor and the second coupling part and receives the rotating angle information of the first coupling part detected by the second coupling part.

This application relates to the field of semiconductor manufacturing technology, proposing a circuit and control method for testing power semiconductors, as well as a testing method. The circuit for testing power semiconductors includes at least three sets of inverters and a three-phase power coupling unit with at least three sets of ports. The DC terminals of the at least three sets of inverters are interconnected to form a common DC bus. Each set of ports of the three-phase power coupling unit is connected to the AC terminal of the corresponding inverter. At least two of the at least three sets of inverters contain the power semiconductor device under test. The inverter includes a DC capacitor unit, an AC filter unit, and a three-phase bridge circuit. The AC filter unit is an L-type filter, an LC-type filter, an LCL-type filter, or an LC combination filter. The topology of the three-phase bridge circuit is a two-level topology, a three-level topology, a multi-level topology, an H-bridge topology, or an H-bridge combination. This method enables active power testing of power semiconductor devices, improves testing accuracy and reliability, and enhances the flexibility of power semiconductor device testing methods.

This application discloses a method and system for spot market bidding decisions in combined heat and power (CHP) power plants, relating to the technical field of CHP power plants. The method includes: acquiring operating data of the CHP unit and market data of the electricity spot market; constructing a heat-power coupling and coal consumption characteristic model based on the operating data and the market data, with rigid heat load supply parameters as the primary constraint; inputting the cleaned operating data and market data, along with energy conversion efficiency, energy consumption characteristics, and feasible domain of CHP output under different operating conditions, into a chaotic hierarchical gray wolf optimization algorithm to initialize the population and implement a hierarchical search strategy; defining a fitness function with profit maximization as the objective, solving for the optimal power output or optimal bid price, and guiding the CHP power plant in making bidding decisions regarding power generation or price. This application aims to solve the problems of unscientific bidding decisions and low profitability of CHP power plants in the electricity spot market.

In examples, provided are leadless power couplers that include (1) a thermal insulating system having an outer wall and an inner wall, (2) a first electrically conductive winding located outside the thermal insulating system, where the first electrically conductive winding is configured to create a varying magnetic field, (3) a plurality of second electrically conductive windings located inside the thermal insulating system and configured to couple to the varying magnetic field, the plurality of second electrically conductive windings being superconductors, (4) a plurality of cryogenic rectifiers, each cryogenic rectifier being coupled to a respective second electrically conductive winding in the plurality of second electrically conductive windings, and (5) a plurality of cryogenic cables coupled between respective outputs of the plurality of cryogenic rectifiers and respective loads.

The application discloses a power-keeping type triphibian unmanned device power transmission device and propeller combination module and a multi-rotor unmanned device, which comprises a first motor, a second motor, a power coupling device, a three-gear automatic mechanical transmission capable of skipping gears and a propeller assembly; the power coupling device is used for selectively or coupling outputting power from output ends of the first motor and the second motor to the three-gear automatic mechanical transmission capable of skipping gears; the three-gear automatic mechanical transmission capable of skipping gears is used for outputting to the propeller assembly after adjusting the rotating speed and the torque; the propeller assembly comprises rotors and rims, the angle and position of the rotors and the rims can be adjusted, and the rotors and the rims can independently rotate around the coaxial center. The application has multiple working modes and strong power output capacity, can provide driving force for the unmanned device, and enables the unmanned device to switch postures among water / land / air different environment operation modes, and improves energy consumption economy through gear adjustment.

The present application relates to the technical field of comprehensive energy system application, in particular to a wind-solar-thermal-pumped distributed robust optimization scheduling method considering variable working condition characteristics of pumped storage units. In view of the problems that system power balance is difficult under high proportion of new energy access, and traditional model is difficult to accurately solve the non-convex nonlinear characteristics of pumped storage units, the present application firstly generates typical scenarios and initial probability based on clustering; the core lies in introducing a model linearization processing strategy, processing the water level-storage capacity curve by piecewise linearization, and using McCormick envelope method to convex relaxation the head-flow-power coupling characteristics of the unit, and constructing a mixed integer linear distributed robust optimization model based on comprehensive norm fuzzy set. On this basis, by using column and constraint generation algorithm for solving, the optimal balance of system operation cost minimization and scheduling robustness is realized while coping with source and load uncertainty.