32results about How to "Achieve power" patented technology

The invention belongs to the technical field of energy storage systems, and provides a multi-scale energy storage system control method and system, and the technical scheme is that a centralized access mode is adopted, an energy storage device is connected to a wind power grid-connected bus, damping control is adopted, a power oscillation damper is additionally arranged, and damping is increased by controlling the output of a DFIG; mode damping, filtering and phase compensation are improved through a POD control structure installed on the machine side; low-frequency oscillation is suppressed through energy storage, positive damping is provided for frequency oscillation of the system, when low-frequency oscillation occurs in the frequency of the system, the energy storage dynamically adjusts the active output according to the frequency change of the system, the control modes mainly include droop control, inertia control and nonlinear control, power compensation and peak load shifting are achieved, the energy storage utilization rate is high, and the energy storage efficiency is high. Damping control is adopted for a multi-scale energy storage system and a new energy system, a power oscillation damper is additionally arranged, and the small disturbance stability of a high-permeability regional power grid is enhanced.

The invention relates to an unmanned aerial vehicle communication and sensing integrated trajectory and beam forming joint optimization method. According to the method, firstly, an unmanned aerial vehicle communication sensing environment is constructed, in the environment, an unmanned aerial vehicle sends superposed signals by using a non-orthogonal multiple access technology, then a bit rate model and a sensing power model are established, and a target function is constructed according to the bit rate model and the sensing power model; and finally, unmanned aerial vehicle flight parameter constraints are set, and under the constraints, the optimal solution of the target function is solved by adopting the improved particle swarm optimization. Compared with the prior art, the method has the advantages that weighted sum maximization of communication user throughput and effective target sensing power is achieved, the spectrum utilization rate is improved, the system application scene is expanded, and the accuracy of unmanned aerial vehicle communication and sensing integrated trajectory and beam forming joint optimization solution is improved.

The invention provides a network construction control method and a control terminal. The method is applied to the networking converter and comprises the following steps: acquiring an output current and a feedback voltage of the networking converter at the current moment; performing flux linkage observation according to the output current and the feedback voltage to obtain a rotating speed and a torque; determining a d-axis reference current and a q-axis reference current according to the rotating speed, the torque and the feedback voltage; and according to the d-axis reference current and the q-axis reference current, generating a feedback voltage at the next moment and a driving wave of the grid-forming converter. According to the method, the virtual flux linkage is adopted to simulate the behavior of the synchronous machine, the rotating speed and torque are controlled, voltage active support and active inertia characteristics are provided, and the stability of a power system is effectively improved.

The utility model relates to a wireless charging device and a vehicle, and the wireless charging device comprises an installation seat which is used for placing electronic equipment; the wireless charging body is movably mounted below the mounting seat, and the wireless charging body comprises a coil and a current detection module electrically connected with the coil; and the driving assembly is configured to drive the wireless charging body to move according to the magnitude of the current detected by the current detection module. Therefore, the induction current change and the charging power of the coil are identified through the current detection module, the driving assembly drives the wireless charging body to move according to the current detected by the current detection module, the current signal is judged in real time, and when the induction current is maximum, the position of the wireless charging coil of the electronic equipment is determined. And the maximum charging power and the self-adaptive charging function are realized. The device is high in intelligent degree, and automatic alignment can be carried out according to the size, the placing position and midway movement of the electronic equipment.

The invention discloses a high-heat-dissipation diamond substrate GaN transistor structure and a preparation method thereof. The transistor comprises a diamond substrate layer, a dielectric layer, an III-N barrier layer, a GaN channel layer and an III-N composite buffer layer. The source electrode, the drain electrode and the gate electrode are wrapped by the dielectric layer, the III-N composite buffer layer, the GaN channel layer and the III-N barrier layer are grown on the original substrate layer in sequence, the source electrode, the drain electrode and the gate electrode are prepared on the surface of the III-N barrier layer, the dielectric layer is deposited on the surface of the III-N barrier layer, the dielectric layer and the diamond are bonded, the original substrate layer is removed, and the device is inverted. And finally, etching an electrode connecting through hole on the surface, and leading the electrode to the surface of the device. The heat dissipation capability of the device can be improved, the self-heating effect of the device can be improved, high-frequency and high-power application is realized, and the stability of the device is improved.

The application provides a sensitivity-based energy storage charging and discharging strategy method, and relates to the technical field of power system energy storage, which comprises the following steps: obtaining current section flow data and current section flow limit value, and judging whether there is a current overload / limit-exceeding section according to a preset overload / limit-exceeding standard; receiving an energy storage charging and discharging request, obtaining energy storage section sensitivity, and determining whether to allow energy storage charging and discharging operation in combination with the judgment result; if energy storage charging and discharging operation is allowed, calculating the maximum charging and discharging power; constructing a short-term load prediction model to determine predicted section flow data; constructing an energy storage charging and discharging strategy to calculate the predicted section flow change amount, and then obtaining simulated section flow data in combination with the predicted section flow data; judging whether there is a future overload / limit-exceeding section again according to the preset overload / limit-exceeding standard, and adjusting the energy storage charging and discharging strategy, so that the real-time performance and adaptability of energy storage charging and discharging can be improved, the energy storage utilization efficiency can be improved, and the safe operation of the power grid can be ensured.

A powered ankle-foot prosthesis and control method based on electro-hydraulic direct drive, belonging to the field of mechanical and hydraulic technology. The present invention solves the problem that the existing powered ankle-foot prosthesis has a low power density ratio and performs poorly in practical applications. The control module of the present invention is connected to the electro-hydraulic direct drive actuator, and fluid pipelines are distributed in the hydraulic valve block. The hydraulic cylinder, the first energy storage sensor and the first pressure sensor are connected to one fluid pipeline with one end oil port of the bidirectional gear pump, and the hydraulic cylinder, the second accumulator and the second pressure sensor are connected to another fluid pipeline with the other end oil port of the bidirectional gear pump, and the calf prosthesis is connected to the hydraulic cylinder. A powered ankle-foot prosthesis and control method based on electro-hydraulic direct drive of the present invention can absorb the negative work done by the human body on the ankle-foot prosthesis in the dorsiflexion control stage through bilateral accumulators, and reduce the peak power required by the prosthesis drive unit in the power plantar flexion stage, thereby realizing energy recovery and power amplification.

The invention relates to the technical field of energy storage, and discloses a composite energy storage adaptive power dynamic allocation method, system and device and a medium, and the method comprises the steps: determining composite energy storage reference power based on obtained load power and network side output power; performing modal decomposition on the composite energy storage reference power to obtain a plurality of IMF components and residual errors from high frequency to low frequency, and determining initial power type reference power and initial energy type reference power based on permutation entropies corresponding to the adjacent IMF components and the residual errors; generating power type adjustment power corresponding to the initial power type reference power and energy type adjustment power corresponding to the initial energy type reference power; a target power-type reference power is determined based on the preliminary power-type reference power, the power-type adjustment power, and the energy-type adjustment power, and a target energy-type reference power is determined based on the preliminary energy-type reference power, the energy-type adjustment power, and the power-type adjustment power. The method has the beneficial effects that the charging and discharging process is optimized, and the cycle life of energy-type energy storage is prolonged.

The application provides a two-stage MPC control method and system for power smoothing output, and relates to the field of new energy control. A discrete state space prediction model is constructed; all state variables are obtained in the current sampling period and used as the input of the first-stage MPC control; the mechanical and electrical state prediction sequence and the optimal control input are obtained by combining the constraint condition and the dynamic optimization objective function of the second-stage MPC control feedback in the last sampling period; in the second-stage MPC control, the optimal power trajectory meeting the smoothing requirement is obtained by combining the smoothing optimization objective function, and is mapped to the control constraint interval of the next sampling period and fed back to the first-stage MPC control; the optimal control input is applied to the execution equipment, and after the constraint condition is fed back to the first-stage MPC control, the next sampling period is entered. The application can inhibit the rapid fluctuation of the generated power without energy storage devices, improve the grid connection quality, and enable the renewable energy power generation system to still stably output under the severe changes of the external environment.

The invention discloses a single-stage isolated bidirectional AC-DC converter and a control method thereof, and belongs to the technical field of power electronic converters, the single-stage isolated bidirectional AC-DC converter comprises a primary side conversion module, a voltage transformation module and a secondary side conversion module, and the primary side conversion module, the voltage transformation module and the secondary side conversion module are connected in sequence. The single-stage isolation type bidirectional AC-DC converter provided by the invention has the advantages of smaller conduction loss, lower cost and higher power density.

The invention provides a photovoltaic system heat collector testing method and device, and relates to the technical field of photovoltaic test.The method comprises the steps that the photovoltaic system heat collector testing device is started; the heat collection amount of a heat collector is determined according to the inlet temperature and the outlet temperature in a preset time period, and the heat storage amount is determined according to the water body temperature; screening time points according to the difference between the heat collection capacity and the heat storage capacity so as to determine a target time point; and the heat collection efficiency at the target time point is obtained, an efficiency curve is obtained through fitting according to the heat collection efficiency, and the total power of the heat collector is obtained according to the efficiency curve. By collecting the data and screening the time points, the efficiency curve and the power of the heat collector are obtained, the test result is prevented from being influenced by deviation data, and the test accuracy of the heat collector is improved.

This invention relates to the field of robot actuator technology, specifically disclosing an integrated joint module with torque sensing and energy self-recovery, and its design method. The method includes: constructing the physical architecture of the joint module; constructing a nonlinear elastic torsional model and a dynamic friction model of the harmonic reducer to calculate and derive the torque; calculating the physical sampling torque; fusing the derived torque and the physical sampling torque using an adaptive Kalman filter to obtain the final torque signal; constructing an energy feedback model under motor braking mode, and calculating the instantaneous flow of recoverable electrical energy in real time based on the energy feedback model when the joint module decelerates or is dragged by an external force; introducing a supercapacitor and a DC-DC converter for energy recovery; and releasing the energy stored in the supercapacitor to the DC bus when the joint module starts up or enters the acceleration phase. This invention can effectively eliminate nonlinear transmission interference caused by the harmonic reducer and can achieve on-site recovery of braking kinetic energy and peak power assistance.

The invention belongs to the field of heaters, and discloses a design method of a directional solidification furnace heater, which comprises the following steps of: 1, calculating the total power of the heater; 2, modular design is carried out on the heater; step 3, performing preliminary simulation and verification; step 4, power distribution of the heating element is carried out; 5, selecting the material of the heating element; step 6, designing the shape of the heating element; and step 7, performing simulation and verification again. The heater designed by the invention can effectively realize the uniformity and consistency of the contour temperature of the outer surface of a heated object and the control of the position of a cold point, and effectively reduce the temperature gradient of a radial section. And particularly, the method shows obvious advantages when heating special-shaped materials, and is suitable for directional solidification of materials with complex shapes.

A novel electric hoisting system includes a motor and a drum connected by a drive mechanism. The output end of the motor is driven by a planetary gear reducer, and the output end of the planetary gear reducer is driven by the drum to drive its rotation. The output end of the motor is driven by a first reduction unit, and the output end of the first reduction unit is driven by the input end of the planetary gear reducer. The motor and the first reduction unit are externally located on the drum. This hoisting system, based on existing technology, adds a first reduction unit, which, when used with a low-torque motor, can meet the power and torque requirements of the entire hoisting system, thereby reducing costs.

The application discloses a self-adaptive SOC equalization control method in a black start process of an energy storage system. Compared with the prior art, the application has the following beneficial effects: compared with the traditional black start control strategy of the energy storage system, the method disclosed by the application effectively realizes SOC balancing and power sharing of different energy storage units in the energy storage system by using a self-adaptive SOC equalization strategy. The application provides an energy storage system capacity configuration strategy in the black start process and a safety threshold of charging and discharging power of each energy storage unit of the energy storage system. The method disclosed by the application improves the stability and reliability of the black start process of the energy storage system.

The invention discloses a four-quadrant operation washing machine variable frequency driver which comprises a full-bridge booster circuit composed of a PFC power switch tube and a bus capacitor, the full-bridge booster circuit is further connected with an alternating current input voltage source, a high-frequency PFC inductor, a current sampling resistor, a motor driving power switch tube and a controlled motor equivalent model, and the full-bridge booster circuit, the high-frequency PFC inductor, the current sampling resistor, the motor driving power switch tube and the controlled motor equivalent model jointly form a complete circuit. Through the arrangement of the full-bridge booster circuit composed of the four PFC power switch tubes and the bus capacitor, a traditional diode rectifier bridge circuit is replaced, bidirectional flow of energy is successfully achieved, that is, the energy is fed back from the power grid side to the controlled motor equivalent model and from the controlled motor equivalent model to the power grid side, energy waste is avoided, and the energy efficiency is improved. Due to the fact that the washing machine can maintain a high speed reduction rate under the condition that the loss probability of electronic devices is not additionally increased, the operation efficiency of the washing machine is greatly improved, the structural design is exquisite and efficient, and the washing machine has great application prospects.

The invention provides a grid-connected inversion control method and system for wind power generation, and belongs to the technical field of inverter control. The method comprises the following steps: pre-storing power optimization curves respectively corresponding to a plurality of different wind speed intervals; monitoring the real-time wind speed, recognizing the current wind speed interval according to the real-time wind speed, and calling the power optimization curve corresponding to the current wind speed interval as the maximum power point tracking reference to control the fan; when the braking requirement of the fan is detected, regenerative electric energy generated by the fan is converted into alternating current through a bidirectional power conversion circuit, and the alternating current is connected into a power grid or charges an energy storage device; the wind speed, output power and direct current bus voltage parameters are monitored in real time, when the super wind speed, super power or super voltage condition is detected, regenerative electric energy recovery braking is started firstly, and if the rotating speed still exceeds a safety threshold value, a mechanical braking mechanism is triggered. The economical efficiency and reliability of wind power generation can be improved.

The present invention discloses a decoupling control method for a weak power grid inverter system. In a weak power grid, due to the characteristics of a resistor network, active power and reactive power are highly coupled. Considering the inherent coupling characteristics of the entire distribution network, by changing the controller parameters and the grid strength, the active power and reactive power of the weak distribution network can be effectively decoupled, solving the impact of the high impedance ratio in the weak distribution network. At the same time, a fuzzy neural network FNN is introduced, and the fuzzy neural network is trained using historical data to learn and model the complex nonlinear relationship of the power system. Combining fuzzy logic and fuzzy neural networks, the network can process fuzzy and uncertain information, and has adaptability and generalization capabilities. The controller dynamically adjusts the system parameters according to the real-time collected data and the output of the fuzzy neural network to achieve decoupling control and optimal distribution of power. It provides a more robust and adaptive solution for the next generation of distribution networks with high penetration.

The intelligently-controlled multicolor LED solar lamp comprises a water storage tank and a protective shell, a multicolor LED lamp panel is fixedly installed at the bottom of the outer surface of the protective shell, and a photovoltaic controller and a storage battery are sequentially and fixedly installed in an inner cavity of the protective shell from left to right. Through the arrangement of the photovoltaic controller, the voltage and current between the solar cell panel and the storage battery can be effectively adjusted in the process that the solar cell panel performs photoelectric conversion on sunlight, and the maximum power point tracking and the charging control are realized; according to the intelligent illumination device, the multi-color LED lamp panel can be automatically controlled to work at night and when the illumination intensity is insufficient, so that the effect of intelligently controlling the overall illumination operation is achieved, rainwater flowing down from the top of the supporting plate and the top of the solar cell panel can be collected and guided in rainy days through the arrangement of the water collecting groove, and the illumination effect is improved. Rainwater can flow into the water storage tank through the water return pipe and the stand column to be collected in a centralized mode.

The application relates to the technical field of energy storage, and discloses a hybrid energy storage system and method supporting mode switching, which comprises a data acquisition and communication module, an operation state analysis and mode decision module, a switching trajectory planning and cooperative control module, a safety monitoring and dynamic compensation module, a panoramic instruction integration and execution module, and a strategy self-learning and optimization module; target operation mode instructions are generated by inputting comprehensive operation state characteristic data of the system into a pre-trained mode research and judgment neural network model, combining a pre-set hysteresis comparison strategy and a minimum time interval constraint of mode switching, and realizing research and judgment on multiple operation modes such as power smoothing, peak clipping and valley filling, frequency modulation auxiliary services, so that frequent mode switching caused by state fluctuations is avoided; characteristic data, control sequences and safety evaluation data of the whole switching process are recorded to form a history library, and the optimization of the switching strategy is realized.

The invention discloses an active bias-based amplifier circuit topological structure, which comprises an active bias circuit unit and a radio frequency amplification circuit unit, and is characterized in that the active bias circuit unit comprises a bias circuit I, a bias circuit II and a transistor I, and the radio frequency amplification circuit unit comprises an input matching network, an output matching network and a transistor II; an input signal sequentially passes through the input matching network, the transistor II and the output matching network to amplify an output signal. According to the circuit topological structure, when the second transistor is in saturation rollback, the first transistor gradually compensates the bias voltage, so that the grid bias voltage of the first transistor changes, in the process, the linearity of a signal becomes better along with the decrease of injection power, and due to the change of the grid bias voltage, the power is reduced slowly, and the linearity of the signal becomes better. The efficiency of the power amplifier in the rollback state can be effectively improved.

The invention provides a charging device, a control method and a control device, and relates to the technical field of charging, and the charging device comprises a power input end, a power output end, a power conversion circuit, a battery module, a DC voltage conversion circuit and a main control circuit. The power conversion circuit is used for converting alternating-current voltage input by the power input end into first direct-current voltage and outputting the first direct-current voltage to the power output end. The DC voltage conversion circuit is used for converting the first DC voltage into a charging voltage of the battery module to charge the battery module, and is also used for converting a voltage output by the battery module into a second DC voltage and outputting the second DC voltage to the power supply output end. And the main control circuit is used for controlling one or both of the power supply conversion circuit and the DC voltage conversion circuit to work according to the working state, so that the charging device can be flexibly switched in different power supply modes, and the function of external power supply, battery power supply or cooperative power supply is realized.

The application discloses a power backflow and confluence transmission system for a tracked platform, which comprises a gearbox, a differential motor, a differential gear ring, a left sun gear, a right sun gear, a planetary gear and a reverse mechanism; the differential gear ring, the left sun gear and the right sun gear are coaxially connected to the gearbox, the planetary gear is rotationally connected to the differential gear ring, and the left sun gear and the right sun gear are symmetrically engaged on the two sides of the planetary gear; the differential motor is connected in transmission with the differential gear ring, the left sun gear is connected with a left electric transmission mechanism, and the right sun gear is connected with a right electric transmission mechanism in sequence. The application is applied to the field of engineering machinery, simplifies the structure, and can realize dynamic adjustment of backflow power, can dynamically change the output power by adjusting the output torque of the differential motor according to the characteristics that the differential bevel gear in the differential axle has a large reverse force and is equal to half of the output force of the intermediate differential motor, and realizes efficient differential control.

The invention provides an optical device. The optical device comprises a shell, an optical chip, a light collecting assembly and a monitoring assembly. The monitoring assembly comprises a reflecting part and a monitoring part, the reflecting part is arranged between the plurality of optical chips and the light collecting assembly, and the monitoring part is arranged on the shell; part of light beams emitted by the optical chips are in a divergent light state, the reflecting part is used for reflecting the light beams emitted by the optical chips in the divergent light state to the monitoring part, and the monitoring part is used for receiving the light beams from the reflecting part and obtaining light beam information of the light beams. According to the optical device provided by the invention, the reflecting part is arranged between the optical chip and the light collecting assembly, and the monitoring part is arranged on the shell, so that the divergent light emitted by the optical chip can be arranged in the monitoring part through the reflecting part, and the monitoring part can obtain the light beam information of the light beam, so that the power and quality detection of the optical signal is realized, and the reliability of the optical device is improved.

A multi-mode hybrid power tractor driving system and a control method thereof relate to the technical field of hybrid power tractors, and comprise an engine, an independent PTO module, a generator, two groups of electric driving systems and a central clutch. The electric drive system comprises a motor and a coupler, and the coupler achieves power converging and shunting through a planet row, a brake and a synchronizer. The system realizes various modes such as single drive, conventional four-wheel drive, super front and rear drive and inter-axle power distribution by controlling the state of each clutch, and can concentrate the power of the double motors to improve the traction force or perform redundant drive when one side breaks down. The PTO direct connection engine guarantees heavy-load operation, and the generator optimizes the working condition of the engine. The problems that a traditional fuel vehicle is high in emission and large in energy consumption, and an existing hybrid vehicle is complex in transmission and low in efficiency are solved, organic unification of environmental protection, energy conservation and intelligent control is achieved, and the vehicle is particularly suitable for the heavy-load operation requirement under the agricultural complex working condition.

The invention provides a control method of a regenerative braking energy utilization system for a double-current system line, which belongs to the technical field of electrified railway traction power supply and comprises the following steps of: constructing a hardware system structure comprising two pieces of power fusion equipment; and establishing a game model with the lowest system electric charge as a target, and optimizing to obtain peak clipping set values of alternating current and direct current traction. Voltage and current data are collected in real time, and filtering processing is performed by using a sliding time window method. And calculating the instantaneous power of the AC and DC loads according to the filtered data. And establishing a fuzzy neural network model, and determining system working modes including energy storage charging, power transfer and energy storage discharging according to the load power and the peak clipping set value. And establishing an adaptive power distribution equation set, and solving to obtain power reference values of the converters and the energy storage system. Power outer loop control is adopted, a corresponding current reference value is calculated, a self-adaptive current tracker is used for generating a switching signal, and utilization control over regenerative braking energy is achieved.

An embodiment of the present application provides an information processing method and device, the method comprising: receiving downlink control information DCI sent by a network device, wherein the DCI includes at least one of the following information: a first priority and a first group identifier. According to the DCI, HARQ‑ACK feedback of the PDSCH corresponding to the first priority and the first group identifier is sent to the network device. The HARQ‑ACK feedback is triggered by the DCI to effectively ensure the sequential feedback of the HARQ‑ACK of data of different priorities. And the method comprises: receiving downlink control information DCI sent by a network device, wherein if the first field used to indicate the DFI in the DCI is preset data, the DCI also includes indication information, and the indication information is used to indicate the TPC and / or the closed loop corresponding to the TPC. The transmit power is adjusted according to the indication information to effectively implement power control of each PUSCH.

The invention discloses a multi-converter-station reactive power control method for a flexible direct-current output system based on a power operation domain, and belongs to the technical field of offshore wind power flexible direct-current power transmission. The method comprises the following steps: calculating the reactive power demand of a receiving-end converter station according to grid-connected point voltage, a reactive power initial value before reactive power fluctuation of the converter station and other information; then stable operation constraint conditions of the receiving-end converter station are analyzed, the constraint conditions comprise converter station apparent power constraint, converter station alternating current limit constraint and converter station alternating current bus voltage constraint, and the steady-state power operation domain of the receiving-end converter station is determined by solving the boundary of the constraint conditions; and finally, based on a reactive power demand and the steady-state power operation domain, designing an active rapid transfer control method considering reactive fluctuation, and realizing power mutual aid and cooperative control among multiple converter stations. According to the method, the offshore wind power flexible direct output system can be always maintained in a steady-state power operation domain, and the reactive power supporting capacity and the operation stability of the system are improved.

The present invention provides an electric vehicle charging system and method, wherein the electric vehicle charging system comprises: a battery swap station and a charging device, the battery swap station comprises at least one first battery swap device battery, the first battery swap device battery in the battery swap station is charged from the mains, and the charged first battery swap device battery supplies power to the charging device, wherein the charging device is used to charge the electric vehicle. The present invention solves the problem of high electric vehicle charging cost in the related art.