96results about How to "Optimize power distribution" patented technology

A multi-layer composite electrode for a light-emitting device, comprising: a transparent, conductive layer; a reflective, conductive layer in electrical contact with the transparent, conductive layer; and a light-scattering layer formed between the transparent, conductive layer and the reflective, conductive layer over only a first portion of the transparent, conductive layer, wherein the light-scattering layer is relatively less conductive than the reflective, conductive layer and the reflective, conductive layer is in electrical contact with the transparent, conductive layer over a second portion of the transparent, conductive layer where the light-scattering layer is not formed. Also disclosed is a method of making such a multi-layer composite electrode in a light emitting device, and an organic light-emitting diode (OLED) device comprising such a composite electrode.

The invention discloses a distribution network expansion planning method considering the optimized operation of a regional integrated energy system. Firstly, a regional integrated energy system modelis established and the internal energy flow relationship is analyzed. Secondly, based on the multi-agent system, a three-layer interactive structure including the main layer, the regional layer and the device layer is built to realize the interaction of different entities on the spatial scale. Then, a bi-level optimization model is established for the distribution network with residential, commercial and industrial regional integrated energy systems. The upper level is used for the expansion planning of distribution network, and the lower level is used for the optimization operation of regional integrated energy systems. Genetic membrane algorithm and sequential quadratic programming are used to solve the upper and lower level models nested nested. Finally, the simulation example shows that the distribution network planning considering the optimal operation of regional integrated energy system can reduce the total cost of planning, improve energy efficiency and new energy consumption rate.

The invention discloses a parallel power distribution control method for a synchronous generator inverter. Based on the steady-state droop characteristic of an active-frequency control strategy of a VSG, an equivalent droop coefficient which is a formula as shown in the specification is obtained; by means of setting the equivalent droop coefficient to be inversely proportional to the inverter capacity, proportional distribution of the active power of the parallel inverters is realized; by adjusting the offset of a droop curve by a distribution consistency algorithm, convergence of the per-unit value of the reactive power of each parallel inverter is realized; and reasonable active and reactive power distribution of the parallel inverters with the synchronous generator characteristic is realized. The power distribution control strategy provided by the invention has high robust performance, high reliability and good power distribution effect, and provides a feasible solution for parallel control of the inverters in the microgrid island operating mode.

An imaging lens comprises, in order from an object side: a first lens having a positive refractive power and a meniscus shape and having a convex surface directed to the object side; a second lens having a negative refractive power in the vicinity of an optical axis of the imaging lens; and a third lens having a positive refractive power in the vicinity of the optical axis, wherein at least one surface of each of the second lens and the third lens is an aspheric surface; and the imaging lens satisfies the following conditional expression expressions:

0.7<|f1/f|<0.8   (1)

0.3<|f2/f|<0.8   (2)

75<_νd₁<96   (3)

TL/2Y<0.9   (4)

where

f: focal length of the imaging lens;

f1: focal length of the first lens;

f2: focal length of the second lens;

_νd₁: Abbe number of the first lens for the d-line;

• • TL: length between the object-side surface of the first lens to an image forming position of the imaging lens; and

Y: maximum image height.

The invention provides a power station power automatic control method and system. The method comprises the steps that S1 the operation state of charging piles is monitored in real time, if a charging pile starts charging, the step S2 is carried out, and if a charging pile stops charging, the step S3 is carried out; S2 the total charging power of charging piles which are in charging and start charging is calculated; if the total charging power is within a control power threshold, the rated power of the corresponding gun is allocated to the charging pile which starts charging and the step S1 is carried out, otherwise the charging power of all charging piles in charging is preallocated to charging piles which are in charging and start charging; according to the minimum power of the gun of each charging pile and the available total rated power, the pre-allocated power is adjusted and output, and the step S1 is carried out; and S3 the charging power of charging piles which stop charging is preallocated to other charging piles in charging; the preallocated power is adjusted and outputted according to the rated power of the guns of charging piles in charging; and the step S1 is carried out. According to the invention, the shortage of charging station resources can be alleviated.

An improved three-pass cylinder drying machine comprises a machine body composed of a bracket, a sealed tank and a cylinder body, and a driving device, a supporting device and a controller, wherein the axial line of the cylinder body of the machine body is parallel to the horizontal surface, an inner cylinder and an outer cylinder that are concentrically arranged are assembled together in a staggered way to form the cylinder body, the formed cavities are used as three drying and precipitation units, the adjacent wallboards of the inner, middle and outer cylinders are connected and positioned via regulating and supporting plates and reinforced buffer plates, a heat insulating cover is disposed at the outer periphery of the wallboard of the outer cylinder, three material homogenizing and spreading machines are respectively disposed at the inner surfaces of the inner, middle and outer wallboards in a screw propulsion way and has reversed helical lines, and gears at the outer periphery of the machine body are aligned with the center of gravity of the cylinder. The inventive three-pass cylinder drying machine effectively solves the shortcomings of the conventional cylinder drying machine, including high deformation and misplacement liability and high axial dislocation liability; and has the advantages of reasonable structural design, stable performance, large precipitation range for one time, high thermal efficiency, saved energy consumptionand wide application range.

The invention provides a communication method, device and system for information and energy cooperative transmission, an unmanned aerial vehicle, and an unmanned aerial vehicle. The communication method for information and energy cooperative transmission comprises the following steps: initializing power distribution and a flight path of the unmanned aerial vehicle and a first cooperative throughput between a source point transmitter and a terminal point receiver, and then optimizing and calculating optimal decision distribution, optimal power distribution and optimal flight path of the unmanned aerial vehicle according to the power distribution, the flight path and the first cooperative throughput, and finally carrying out cooperative communication according to the optimal decision distribution, the optimal power distribution and the optimal flight path. According to the communication method for information and energy cooperative transmission, wireless energy-carrying communication isintroduced into unmanned aerial vehicle auxiliary communication, so that energy limitation of the unmanned aerial vehicle can be effectively relieved by obtaining wireless energy from a radio signal transmitted by an information source point, and the cooperative throughput between a source point transmitter and a terminal point receiver is maximized.

The invention provides an optimization method of power distribution in an accessing strategy of wireless relays of the internet of things. The method includes that in a local region of the internet of things, multiple nodes of the internet of things share a node in a wireless mode to be accessed to an application scenarios of a public cellular network, a model of attenuation channel capacity is adopted, the maximum channel capacity serves as the optimization method, and joint optimization of the power distribution is carried out on multiple access channels and multiple node relay channels in the scenarios. Due to the fact that a control device is relatively simple, the optimization method of the power distribution has the advantages of being rapid and brief, and requirements of the power optimization in the scenarios of the internet of things are met.

The invention discloses an energy sharing and power distribution method of an EH distributed base station system. A definition is shown in the description, N is the number of remote antenna elements;M is the number of antennas configured for each remote antenna unit; gi is an M * 1 dimension channel vector; wi is a beamforming column vector of the remote antenna element i, the length is M and | |wi | |<2>=1. The method is obtained by solving the following optimization problem: (shown in the description). The present invention can realize the share of the collected energy of the EH distributebase station system among the components within the system, on the premise of minimizing the power supply of smart grid, the optimal power distribution can be obtained and the transmission rate of the system can be improved. Moreover, by preferentially using the collected energy, the dependency on smart grid and the cost of distributed base station system are reduced.

The invention provides a control method of a hybrid energy storage system for stabilizing intermittent power fluctuation. According to the method, a power acquisition module is utilized to acquire the output power P of an intermittent power supply in real time. The method includes the specific steps that (1) the stabilized target power Pg (k) of the intermittent power supply is acquired; (2) the power magnitude and the SOC of the hybrid energy storage system are analyzed; (3) the output power P is stabilized according to the output power magnitude and the SOC of the energy storage system. Compared with the prior art, according to the control method of the hybrid energy storage system for stabilizing intermittent power fluctuation, power fluctuation can be simply and efficiently stabilized, and power generation stability and reliability of the intermittent power supply are improved.

The invention discloses a power domain NOMA cooperative transmission method and device based on bit error rate fairness. The method comprises the following steps: establishing a transmission system model; carrying out boundary simplification processing on the received signal of the destination node to obtain upper boundaries of the detection signal and the noise signal; decomposing the upper boundaries of the detection signal and the noise signal into sub-signals containing two independent random variables respectively, wherein the two independent random variables obey the exponential distribution of preset parameters respectively; calculating a moment mother function of a detection signal, simplifying the moment mother function, obtaining an error rate closed-form boundary formula according to the simplified moment mother function, and calculating a closed-form solution of an average symbol error rate through the error rate closed-form boundary formula. According to the method, the service quality of weak users can be improved, the error rate closed boundary formula with a simple structure is obtained, the performance of the error rate can be adjusted through the formula, the fairness and high signal-to-noise ratio conditions of the users can be met, and then the optimization of power distribution and the expansion of various scenes are realized.

The invention discloses a correlation rotation precoding method applied to a GFDM communication system. The problem of relatively low symbol error rate transmission performance of a generalized frequency division multiplexing GFDM communication system in the prior art is mainly solved. The related rotation precoding method comprises the following specific steps: (1) constructing an autocorrelation matrix; (2) constructing a zero forcing precoding matrix; (3) constructing a correlation rotation matrix; (4) eliminating a multiplicative channel fading factor; (5) constructing a correlation rotation precoding matrix; (6) precoding; and (7) transmitting a to-be-transmitted symbol. The correlation rotation precoding method disclosed by the invention has the advantages of high symbol error rate performance, adverse effects caused by self-interference and multi-path channel interference can be simultaneously eliminated, the interference is utilized to improve the symbol error rate transmission performance of the generalized frequency division multiplexing GFDM communication system, meanwhile the precoding processing method of signals is simple and feasible, and the signal transmission requirements of users in a real environment can be satisfied in a multi-path channel scene.

The mechanism (6) has a planet gear (11) with an outside toothing that constantly meshes with inside toothing of a hollow gear (10), where the planet gear is rotatably positioned on a planet carrier (15). A sun gear (14) includes an outside toothing that constantly meshes with the toothing of the planet gear. A drive assembly (7) is connected to the hollow gear, planet carrier or the sun gear. An output shaft (5) is connected to the planet gear via a coupling mechanism (9). The planet gear, sun gear and the hollow gear have radii that are variable along the circumference.

The invention relates to a polar code security coding method in a non-orthogonal multiple access system, and belongs to the technical field of physical layer security coding. A base station sends information to legal users through a non-orthogonal multiple access system, every two users form a user pair to occupy the same time-frequency resource, and meanwhile, one eavesdropping user eavesdrops the information of the user pair; according to the method, an artificial noise assistance method is utilized to deteriorate an eavesdropping channel, and power distribution among different users in thenon-orthogonal multiple access system is optimized, so that the safety capacity of the system is maximized; based on the channel difference between a main channel and an eavesdropping channel, a polarization code nesting characteristic is utilized at a sending end, a security information interval is constructed to place security information, polarization code coding is carried out, and safe transmission is realized. According to the method, the power distribution among users is optimized, so that the safe transmission capacity of the polar code is maximized; and the method is also suitable fornon-degenerated eavesdropping channels, and is more widely applied to application scenarios.

The invention relates to a battery energy storage system for alleviating a problem of photovoltaic power generation abandoning and limiting and a control method therefor. The battery energy storage system comprises N photovoltaic power storage grid connected units connected with a power grid, a photovoltaic power generation abandoning control module, a charge and discharge power distribution module for the battery energy storage system, box type voltage step-up transformers corresponding to all the photovoltaic power storage grid connected units; each photovoltaic power storage grid connected unit comprises a photovoltaic power generation unit and a battery energy storage unit; each photovoltaic power generation unit is connected to a PCC grid connected point on a low voltage side of a three phase power grid, and a corresponding battery energy storage unit is connected to the PCC grid connected point on the low voltage side of the three phase power grid. Compared with technologies of the prior art, the battery energy storage system and the control method therefor are advantageous in that construction cost of a voltage step-up transformer substation in a photovoltaic power storage station is lowered, and economical efficiency of photovoltaic power generation is improved.