50results about How to "Realize power distribution" patented technology

The invention provides a hybrid energy storage capacity optimal allocation method for an AC / DC hybrid microgrid, and belongs to the field of the AC / DC hybrid microgrid. The hybrid energy storage capacity optimal allocation method comprises the steps: establishing a hybrid energy storage capacity two-layer optimal allocation model; power allocation verification based on set empirical mode decomposition; and allocation of the hybrid energy storage system capacity. The power commands of the lithium battery and the supercapacitor are obtained by the filter order. The energy storage life and the converter loss are comprehensively considered with the rated power and the rated capacity of the lithium battery and supercapacitor as the optimization variables and the annual integrated cost of the system as the goal, and an adaptive particle swarm optimization algorithm is applied to perform optimal solution so as to obtain the optimal annual integrated cost of the system and the corresponding rated power and rated capacity of the lithium battery and the supercapacitor. The problem of tie-line power fluctuation caused by wind-optical output fluctuation and load fluctuation in the AC / DC hybridmicrogrid can be solved.

The invention discloses a power distribution method, including: determining that each sub-carrier can obtain power gain with maximum signal-noise ratio at the receiving terminal according to the channel estimate value and noise estimate value of each sub-carrier, and determining the power distribution vectors of each sub-carrier according to the power gain; the sending terminal executing emissionpower distribution to each sub-carrier according to the power distribution vectors. The invention simultaneously discloses a sending terminal, including a power gain calculation module and a power calculation distribution module. The invention also discloses a power distribution system, including a sending terminal and a receiving terminal. The invention goes forth from the object of decreasing the influence of the deep fade sub-carrier to the distributed MIMO-OFDM system performance, determines that each sub-carrier can obtain power gain with maximum signal-noise ratio at the receiving terminal according to the channel estimate value and noise estimate value, determines the power distribution vectors of each sub-carrier according to the power gain, realizes the power distribution to the distributed MIMO-OFDM system, and adopts the corresponding process at the receiving terminal and improves the system performance.

The invention discloses a combined coaxial unmanned helicopter. The combined coaxial unmanned helicopter is provided with a helicopter shell, a helicopter body supporting structure, an engine, an oil tank, a helicopter main rotor, a helicopter main speed reducer, wings and a tail wing and further comprises a power distribution and clutch system and a propelling propeller. The propelling propeller is mounted on the rear portion of a helicopter body. The combined coaxial unmanned helicopter can fly at different flight stages according to different flight speeds, power of the engine is distributed to the main rotor and the propelling propeller through the power distribution and clutch system, and vertical take-off and landing, hovering, low-speed forward flying, medium-speed flying and high-speed flying are achieved. The combined coaxial unmanned helicopter has the advantages that compared with a conventional helicopter, the flying speed can be remarkably increased; one set of engine is used for supplying power to two sets of flying systems, and the weight is low; the two coaxial rotor wings are adopted, airflow is symmetrical, the pneumatic effect is good, the structure is compact, the size is small, the self-rotation mode is achieved at the high speed, and resistance force is smaller.

The invention discloses an allocation method for optimal power of green cognitive radio security energy efficiency, which is mainly used for solving the problem in the prior that the maximum security energy efficiency cannot be guaranteed. The allocation method comprises the following steps: setting a power allocation parameter; initialing the power allocation parameter; calculating a true value of optimal sending power; calculating a lagrangian multiplier; calculating an iterative true value of the optimal sending power; calculating an iterative error of the lagrangian multiplier; judging whether the lagrangian multiplier satisfies a termination condition; calculating a security energy efficiency function; calculating secondary user security energy efficiency; judging whether the termination condition is satisfied; and obtaining the optimal sending power of the secondary user security energy efficiency and secondary user maximum security energy efficiency. The allocation method disclosed by the invention has the advantages that the allocation method can be applied to power allocation of maximum security energy efficiency in a green cognitive radio network, the necessary iterations are few, the allocation method is applicable to a variety of fading channels, and the allocation method is easy to achieve.

The present invention discloses a power allocation method of a virtual cell in a 5G high density network. The method includes a first step of initializing number of iterations i to be 0 and p<m, n, k> to be 0, and initializing a Lagrange multiplier; a second step of calculating an allocation power p<m, n, k> according to a Lagrange multiplier for iteration at present; a third step of making the number of iterations i i+1, and updating the Lagrange multiplier; and a fourth step of determining whether the Lagrange multiplier is converged, if yes, making an allocation power matrix obtained through calculation at present a final allocation power, if not, executing the second step. The method has lower complexity.

The invention discloses a dual-stator motor drive system, wherein a first winding (10) is wound in the stator groove (12) of a left stator (1), while a second winding (11) is wound in the stator groove (14) of a right stator (2); the left stator (1) is electrically isolated from the right stator (2), while the first winding (10) is electrically isolated from the second winding (11); a first power source (4) and a second power source (5) are coupled to an alternating current and direct current conversion module (8), respectively; a drive circuit (7) is coupled to the alternating current and direct current conversion module (8); the alternating current and direct current conversion module (8) is coupled to the wire outlet ends of the first winding (10) and the second winding (11) of an alternating-current motor (3); a logical algorithm circuit (6) is coupled to the drive circuit (7); and a control module (9) is coupled to the logical algorithm circuit (6). Aiming at the defect of the traditional motor drive system, a dual-motor drive system capable of improving the system energy utilization efficiency and also capable of effectively handling motor faults is designed.

The invention relates to a power generation method and device with geothermal energy, and the invention is characterized in that the method includes the following steps: a. Utilize geothermal circulation on the bottom of geothermal wells to heat water inside the well; and then, utilze the hot water to increase temperature of low-boiling-point working substance liquid inside a heat exchanger, so that ebullition can be fulfilled to continuously produce working substance steam; b. continuously deliver working substance steam in a certain pressure, in order to propel a steam engine to work and, meanwhile, rotate a generator to create electric power; c. condense low-pressure working substance steam out of the steam engne to enter the heat exchanger; and then, heat the hot water into an ebullition status, so that the working substance steam can be formed into low-boiling point working substance for closed circulation purpose. The power generation method and device with geothermal energy in the invention can conveniently and effectively utilize geothermal energy in 3500 meters underground, so that no greenhouse gas is emitted. Moreover, the invention can guarantee less investment, short construction period and low power generation cost.

The invention discloses an electric vehicle composite power supply system energy management method, which comprises the steps that a composite power supply system model is established; an energy control strategy module detects change conditions of charge states and load currents of a super capacitor and a battery, uses expected values of charging and discharging power as threshold values, and usesa logic threshold value control strategy to distribute energy respectively needing to be borne by the super capacitor and the battery according to the driving state of a vehicle; a bidirectional DC / DC converter control module performs negative feedback adjustment by adopting a PI controller, and controls the magnitude and direction of the output current of a bidirectional DC / DC converter by taking the error between the target current of the load and the sampling current as the input of the PI controller; and the expected values of different charging and discharging powers are set, and the composite power supply system model is simulated in combination with the working conditions to obtain the optimal expected values of the charging and discharging powers. According to the invention, powerdistribution of the electric vehicle composite power supply system and simulation optimization of expected values of charging and discharging power are realized.

The invention discloses a distributed energy allocation method for small cell networks based on the game theory. For a multi-cell LTE mobile communication system, a novel distributed power allocation method is provided; by means of the method, under the restrictive condition that the cell power and the sending rate are satisfied, the ratio of the cell system capacity to the energy loss is increased to the most extent; and thus, the purpose of providing the relatively high rate with relatively low energy consumption can be achieved. According to the method disclosed by the invention, a multi-cellular non-cooperative game model is established at first; the existence of Nash equilibrium points of the system model is proved; furthermore, an iterative resource allocation algorithm is provided; the system energy efficiency is optimized through continuous iteration of power of cells on sub-carriers; and a simulation result shows the existence of the Nash equilibrium points of the system model, and explains that the algorithm is convergent to the Nash equilibrium points.

The invention discloses an energy-saving method for an electric dust removal system, comprising the following steps: 1) adjusting the power of one of the electric fields, and keeping the power of the remaining electric fields unchanged; 2) repeating the above step 1 for each of the remaining electric fields in sequence ); 3) Adjust the power of all electric fields to its original power; 4) When the turbidimeter signal is greater than the maximum concentration allowed by the system, adjust the power supply level of each electric field to its rated power; otherwise, enter step 5); 5) When the turbidity signal is less than the discharge standard, reduce the power of the gradient minimum electric field; when the turbidity signal is greater than the discharge standard, increase the power of the gradient maximum electric field, and when the turbidity signal is equal to the discharge standard, keep the power of all electric fields as its original power; 6) Repeat steps 4) to 5) above every 4 to 6 minutes. By using the method of the invention, the power distribution among the electric fields can be adaptively adjusted to realize maximum energy saving.

The invention relates to the field of communication, in particular to a power divider, an electronic device, a radio frequency front-end device and a power dividing method. The power divider comprises an input port (P1), a first output port (P2) and a second output port (P3), wherein at least two segments of which the characteristic impedances decrease in sequence are connected in series between the input port (P1) and the first and second output ports (P2, P3); each segment comprises transmission lines which are connected in parallel; each parallel transmission line in every segment is connected through a concentrated resistor at the tail end of each segment which is positioned on one side of the first output port (P2) and one side of the second output port (P3); and the resistance of each concentrated resistor increases in sequence from the input port (P1) to the first and second output ports (P2,P3). Due to the adoption of the power divider, the electronic device, the radio frequency device and the power dividing method, ultra-wideband equal power dividing can be realized in a planar circuit mode.

The invention discloses a multi-relay cooperative self-adaptive relay selection and power distribution method. A shuffled frog leaping algorithm is introduced into an AF multi-relay cooperative system, path loss is fully considered under the condition that total power is subjected to certain constraint, the maximum average signal to noise ratio of a destination node serves as a target, and the searching advantages of the shuffled frog leaping algorithm are utilized to achieve power distribution of the AF multi-relay cooperative communication system and reduce BER performance of the system.

The invention discloses a dual-motor drive system, wherein a first motor (2) and a second motor (4) are coupled to a mechanical coupling device (5); a first power supply (6) and a second power supply (7) are coupled to an AC (alternating-current)-DC (direct current) converter module (10) respectively; a drive circuit (9) is coupled to the AC-DC converter module (10); the AC-DC converter module (10) is coupled to the leading-out terminals of the first winding (1) of the first motor (2) and the second winding (3) of the second motor (4); a logical algorithm circuit (8) is coupled to the drive circuit (9); and a control module (11) is coupled to the logical algorithm circuit (8). Aiming at the defects of traditional motor systems, the motor drive system designed can optimize power supply and configuration and improve work reliability.

The invention discloses a convenient-to-monitor power distribution system which comprises a box body, a box door and a box cover. The box door is arranged on a front plate of the box body, a metering unit, a power distribution unit, a reactive power compensation unit and a monitoring unit are arranged in the box body, and the monitoring unit comprises a power source management module, a positioning module, an information acquisition module, an information processing module and a wireless communication module. The system integrates the metering unit, the power distribution unit and the reactive power compensation unit, so that power distribution of a power grid is realized; the system communicates with a remote monitoring platform through the monitoring unit to monitor a power distribution box in real time; when the power distribution box is abnormal in voltage, temperature in the box body or the box door, the monitoring unit sends abnormality information together with position information of the power distribution box transmitted by the positioning module to the remote monitoring platform, and maintenance personnel timely knows the power distribution box which is abnormal through the remote monitoring platform and timely takes remedial action.

The invention provides a method for distributing electric energy among multiple microgrids. Each microgrid is a node allowed to be authorized on the network. Point-to-point direct energy electric quantity distribution can be carried out. Electric quantity distribution is issued by using an intelligent contract designed by Ethereum. Each microgrid participant calls the contract, participates in bidding, obtains an electric quantity distribution result and then performs settlement through the intelligent contract, i. I energy shortage still exists after electric quantity distribution is finished, the power distribution network performs supplementation, and electric quantity distribution settlement with the power distribution network is also completed through the intelligent contract. In theprocess, information of electric quantity distribution needs to be verified by each node in the network through a POW consensus mechanism, the information is recorded in a block chain after successfulverification, and rewards for generating blocks and commission charge rewards for electric quantity distribution are obtained by the node which completes verification firstly. Electric energy distribution and exchange between the micro-grids and between the micro-grids and the power distribution network can be realized, supply and demand balance is ensured, the income of the micro-grids is improved, and the distribution coefficient is recorded.

The invention relates to a micro-grid inverter power control method under a complex network topology. The method comprises the following steps: 1, carrying out power distribution error analysis based on coupling droop control for the complex network topology, so as to determine whether the resistance-inductance type droop control needs to be improved or not; 2, when it is determined that improvement is needed, setting a complex network topology improvement control strategy; and 3, controlling the power of the micro-grid inverter based on the complex network topology improved control strategy. Aiming the problem that the traditional droop control cannot be used and the power distribution of the load is also caused by the change of the line impedance corresponding to the inverter unit due to the switching of the load and the inverter unit in the actual micro-grid system, improved coupling droop control is adopted, it is verified through theory and simulation that the method can be applied to a complex network topology, and the power distribution effect is good.

The invention discloses a design method of a modular power supply for a flying robot carrying a redundant mechanical arm. The design method mainly comprises the following steps: designing an input andoutput index of the modular power supply according to a design requirement of the flying robot carrying the redundant mechanical arm; designing a connection mode of a power supply module and a circuit board and input and output ports and the like according to the input and output index; drawing a functional block diagram of a single power supply module according to the port design content of thepower supply module, wherein the single power supply module includes a switching power supply system, an independent current sharing system and a protection system; designing and manufacturing a PCB circuit board of the modular power supply according to a designed hardware system schematic diagram of the single power module; and installing the PCB circuit board into the flying robot carrying the redundant mechanical arm. The method of the invention has great improvement in the safety, reliability and secondary development of the modular power supply, and has strong practicability.

The invention discloses a power divider applied to a double-gun direct-current charging pile. The power divider is applied to the technical field of charging, and is used for solving the technical problem of resource waste of an existing double-gun direct-current charging pile. The power divider applied to the double-gun direct-current charging pile comprises a charging module, a positive bus, a negative bus, a charging controller, a positive high-voltage direct-current contactor and a negative high-voltage direct-current contactor which are arranged in the charging pile, wherein the positivehigh-voltage direct-current contactor is arranged on the positive bus; the negative high-voltage direct-current contactor is arranged on the negative bus; the positive high-voltage direct-current contactor is respectively connected with a positive electrode of the charging module and an output end of the positive bus; the output end of the positive bus forms a positive input end of an external first charging gun and a positive input end of an external second charging gun respectively; the negative high-voltage direct-current contactor is connected with a negative electrode of the charging module and an output end of the negative bus respectively; and the charging controller is connected with the positive high-voltage direct-current contactor and the negative high-voltage direct-current contactor.

The present invention discloses a power distribution method for cognitive system constrained based on transmitting antenna power. The method mainly includes: first establishing a power distribution optimization problem of a cognitive base station terminal, and next, solving the optimal beam forming vector according to system parameters, thereby determining a user transmitting power and the transmitting power distributed to each antenna. The method specifically includes: the established optimization problem takes the minimum system total transmitting power as the optimization target, and the constraining terms are: constraining the interference of the main user, constraining an SINR of the cognitive user and constraining the transmitting power of each transmitting antenna of the cognitive base station terminal. Since during the actual communication process, all ends of each antenna of the base station terminal will be provided with power amplifiers, and the abilities of transmitting power of the antennas are different from each other, the present inventions considers the constraining of the power of each antenna more conforms to the actual situation, and it has a certain degree of practical values.

The invention discloses a new energy automobile driving system based on a composite hydrogen fuel and lithium ion battery. The new energy automobile driving system based on the composite hydrogen fueland lithium ion battery comprises a supercapacitor module, a hydrogen fuel battery module management system, a hydrogen fuel battery, a gas control system and a lithium battery module; an output endof the hydrogen fuel battery is connected with a charging input end of the lithium battery module; the anode and the cathode of the hydrogen fuel battery are respectively connected to the anode publicconnection point and the cathode public connection point of the supercapacitor module and the hydrogen fuel battery module management system in parallel; the lithium battery module and the supercapacitor module are respectively connected with a sampling signal input end of the hydrogen fuel battery module management system through a bus; and a control signal output end of the hydrogen fuel battery module management system is connected with the gas control system of the hydrogen fuel battery. The invention relates to the technical field of hybrid drive, can reflect the dynamic situation of thehydrogen fuel battery in real time and can improve the durability performances of the hydrogen fuel battery and the lithium battery. And by using the method, reasonable electric energy distribution between the hydrogen fuel battery and the lithium battery is realized.

The invention provides a space vector modulation method of a multi-source converter, and belongs to the technical field of pulse width modulation of the multi-source converter. The space vector modulation method comprises the steps of building a neutral point potential unbalance space vector model by combining a standard right-angle coordinate system; dividing a small vector into a first vector group and a second vector group, and determining a boundary equation of a small sector comprising small vectors in the first vector group and the second vector group; determining a reference voltage vector according to the boundary equation of the small sector; calculating an action time proportion of a basic vector of the small sector; and performing hybrid modulation on the first vector group andthe second vector group according to the action time proportion so as to achieve DC-side power allocation and acquire various energy circulation modes. The problem brought by neutral point voltage unbalance is solved by a coordinate operation-based method, and the operation quantity is reduced; and hybrid modulation of the first vector group and the second vector group is employed, power allocation of a DC side is achieved by controlling action time weights of the first vector group and the second vector group, and more energy circulation modes are obtained.

The invention discloses a multi-redundancy power distribution system for an unmanned plane. The system comprises a power supply system, a voltage acquisition system, a controller and a flight control system. The power supply system is connected with the voltage acquisition system and also the flight control system. The controller is connected with the power supply system. The power supply system is formed by three or more than three power supply circuits, wherein the first power supply circuit includes a first power supply input, a first MOS transistor switch unit and a first power supply output, the second power supply circuit includes a second power supply input, a second MOS transistor switch unit and a second power supply output, and the third power supply circuit includes a third power supply input, a third MOS transistor switch unit and a third power supply output. The voltage acquisition system includes a first voltage acquisition part, a second voltage acquisition part and a third voltage acquisition part. The multi-redundancy power distribution system is applied to multi-redundancy power supplies and power supply distribution for an unmanned plane flight control system, provides multiple paths of power supply to the flight control system, preferably supplies power in an intelligent manner, and prevents the unmanned plane flight control system from being malfunctioning due to power supply problems.

The invention relates to the field of charging piles, in particular to a direct-current charging pile dynamic intelligent power distribution system and distribution method. The direct-current chargingpile dynamic intelligent power distribution system comprises a master control module and multiple power output modules controlled by the master control module; the power output modules are grouped toform multiple power distribution rings, when one power distribution ring needs to output power, the master control module is suitable for controlling the power output modules in the power distribution rings to be combined to be matched with needed output power, the dynamic power distribution of a charging pile is achieved, and power waste is reduced.

The invention discloses a cascaded H-bridge converter flexible grid connection method based on hierarchical voltage control. The cascaded H-bridge converter is composed of k H-bridges which are connected in an end-to-end way and used for improving the overall output voltage level and power capacity, realizing friendly grid connection of low voltage distributed power sources and injecting requiredactive power and reactive power into the grid. The central controller realizes accurate power control of parallel nodes by means of hierarchical control and the local controller performs secondary adjustment to realize internal power distribution of the cascaded system. The hierarchical control strategy has flexible power control performance, provides a favorable supplement for the control strategy of the future photovoltaic and energy storage cascade system and has high practicability.

The invention provides a multi-VSG inverter circulation suppression and fault processing control method and system, and the method comprises the steps: carrying out the compensation of each VSG inverter through employing a pre-synchronization control compensation method for each VSG inverter which completes the setting of a power parameter when the grid-connected switching is carried out through an off-grid mode until the grid-connected requirements are met; during steady-state operation after grid connection, if an asymmetric fault of a load occurs, connecting the current type inverter and the VSG inverter in parallel after power parameter setting and connecting the current type inverter and the VSG inverter into a power grid, and compensating for the unbalanced current, wherein the powerparameter of each VSG inverter is set based on the rated capacity of each VSG inverter. The multi-VSG inverter control method provided by the invention not only effectively ensures that the multi-VSGinverter can realize power distribution through parameter setting, but also can ensure synchronization with a power grid in a pre-synchronization process, can effectively suppress grid-connected impact current, improves electric energy quality, and realizes seamless switching between operation modes. And the problem of circulating current among the multiple VSG inverters is eliminated.

The invention relates to the field of charging, and in particular, relates to a power divider. The power divider comprises an external channel and switch modules; the external channel comprises M groups of input channels and N groups of output channels, M is greater than or equal to 2 and is a positive integer, N is greater than or equal to 1 and is a positive integer, the input channels are arranged in parallel, the output channels are arranged in parallel, and the input channels and the output channels are arranged in a cross array; the number of the switch modules is the smaller value of M and N, the switch modules and the input channels or the output channels with the same number are arranged in a one-to-one correspondence mode, the switch modules share the output channels or the input channels, and each switch module comprises a moving carrier and an electrode unit arranged on the moving carrier; and the moving carriers drive the electrode units to move in the extending direction of the input channels or the output channels arranged in one-to-one correspondence, and the electrode units are electrically connected with the input channels and the output channels in a telescopic mode. The problems that in the prior art, a plurality of relays or a plurality of paths of relays are adopted for power distribution, lines are complex, and heat productivity is high are solved.

The invention discloses a power divider based on a vertical transition structure, and the power divider comprises a planar dielectric plate, and two sides of the upper surface of the dielectric plateare symmetrically and parallelly provided with two vertical dielectric plates which are perpendicular to the upper surface. Planar metal bottom plates are arranged on the bottom surfaces of the planardielectric plates, and vertical metal bottom plates are arranged on the opposite outer side surfaces of the two vertical dielectric plates; metal sheets are arranged in the opposite outer sides of the two vertical metal bottom plates and located on the upper surfaces of the planar dielectric plates respectively, and the two metal sheets are connected with the corresponding vertical metal bottom plates respectively and connected with the planar metal bottom plates through metal through holes penetrating through the planar dielectric plates respectively; the planar dielectric plates are provided with T-shaped structure microstrip lines, and the two vertical dielectric plates are respectively provided with a vertical microstrip line, and are respectively connected with two ports of a straight line in the T-shaped structure. According to the invention, quasi TEM mode electromagnetic waves in microstrip lines in different planes at a vertical transition position can be continuously propagated, and the application limitation of the microstrip power divider in a three-dimensional space is overcome.