18 results about "Power relationship" patented technology

The invention provides a circulation power optimization method and system for a three-phase dual-active bridge, and relates to the field of power electronics, the method comprises the following steps: determining an optimal backflow modulation strategy set corresponding to a hybrid modulation group, the hybrid modulation group comprising triangular wave modulation, trapezoidal modulation, synchronous modulation and extended phase shift modulation, the optimal backflow modulation strategy set corresponding to the hybrid modulation group comprises modulation modes and degree-of-freedom relationships corresponding to different transmission power per unit value ranges in different voltage conversion ratio ranges; determining a degree of freedom and power relationship set corresponding to the hybrid modulation group, wherein the relationship set comprises a relationship between the degree of freedom and power of different transmission power per unit values corresponding to each mode; the phase shift angle, the primary side duty ratio and the secondary side duty ratio are determined by combining the real-time voltage conversion ratio and the real-time virtual power per unit value, operation of the three-phase dual-active bridge is controlled, and the method has the advantages of reducing complexity and improving portability and efficiency.

Configurations for a light splitting device used for light splitting over an operating bandwidth of wavelengths are disclosed. The light splitting device may include a first coupler and a second coupler, where the first coupler has a first splitting power relationship and the second coupler has a second splitting power relationship and the first and second splitting power relationships are complementary to one another over the operating bandwidth of wavelengths. The light splitting device may further include a phase delay positioned between the first and second couplers. The phase delay may result in the output light having an approximately even optical power distribution across the operating bandwidth of wavelengths. In some embodiments, the first and second couplers may be directional couplers and, in other embodiments, the first and second couplers may be tapered couplers.

The invention provides a power load monitoring data fusion method, device and equipment and a storage medium, and the method comprises the steps: firstly obtaining power load multi-source data containing meteorological elements, and constructing a power physical constraint branch according to the data; a differential equation module is used for modeling a temperature response curve, a delay integral module is used for simulating a rainfall penetration process, and physical rule dynamic weights are generated and set as gating signals. And the gating fusion unit is controlled to output the weight through the signal, so that load monitoring physical rule embedding is realized. According to the method, a power physical constraint branch is constructed, a temperature-power relation and a precipitation hysteresis effect are modeled by a specific module, a dynamic weight driving gating signal is generated, a physical rule is embedded into a fusion model, and the accuracy and generalization of load monitoring are improved.

An image display system for displaying fishing data from an electric reel uses a speed detection unit to determine the line speed during reeling and casting, and a current detection unit and a voltage detection unit to detect the system's current and voltage values, respectively. A memory unit stores a speed relationship table and a power relationship table. A coefficient calculation unit inputs the aforementioned values ​​into the speed relationship table and the power relationship table to calculate a line speed coefficient and a power coefficient. Then, a fishing data calculation unit integrates the two coefficients to calculate fishing data, and integrates the calculated fishing data into an image result and displays it on a display device. This allows anglers to intuitively understand the fish's fighting power, increases visual stimulation, and makes fishing more interesting.

The invention provides a fuel scheme determination method of a heat pipe type reactor core, electronic equipment and a medium, and relates to the technical field of nuclear reactors. The heat pipes and the fuel rods in the reactor core are classified, on one hand, the power relation between the fuel rods is determined according to the function condition that the heat pipes have the same heat transfer power, and on the other hand, the relation between the power of the fuel rods and fuel parameters is determined by conducting power distribution calculation on the reference reactor core. Subsequently, according to the power relation and the relation between the power of the fuel rods and the fuel parameters, the fuel parameters of all the fuel rods in the preset structure are determined, and therefore the reactor core fuel scheme is determined, and the heat transfer power of the heat pipes at different positions in the reactor core is flattened.

The invention discloses a deterministic planning extension method and system for optimizing an embedded flexible AC / DC power grid, and relates to the technical field of power systems. The method comprises the steps of evaluating the load bearing capacity and growth trend of power grid nodes; the sum of alternating current / direct current construction cost, power generation cost and load shedding cost is taken as an optimization target; establishing a power relationship by adopting a direct-current power flow model; constructing a constraint condition set covering alternating-current and direct-current power balance, equipment capacity, topological association and the like; and solving step by step to generate a comprehensive planning scheme. The system is correspondingly provided with an evaluation module, a target module, a modeling module and the like, and a cost calculation and model verification module is additionally arranged to improve the accuracy. According to the invention, alternating current and direct current collaborative optimization is realized, the problems of single target and incomplete constraint of traditional planning are solved, and the economical efficiency, reliability and feasibility of power grid planning are improved.

The invention relates to the technical field of energy storage, and discloses an energy storage control method and device for a new energy station, electronic equipment and a storage medium, and the method comprises the steps: obtaining the voltage variation and frequency change rate of a power grid connected to the new energy station; if the voltage variable quantity of the power grid is greater than the voltage change threshold value, performing power compensation on the new energy station based on reactive power which can be provided by the inertia flywheel so as to adjust the voltage variable quantity to be within the voltage change threshold value range; if the frequency change rate of the power grid is greater than the frequency change rate threshold value, obtaining the station demand power of the new energy station, the current charge state and the charging and discharging power upper limit of the inertia flywheel, and a first power relationship between the station demand power and the charging and discharging power upper limit of the inertia flywheel; and performing energy storage control on the new energy station based on the station demand power, the first power relationship and the current charge state of the inertia flywheel, thereby improving the capability of the new energy station to cope with the disturbance of the power grid on multiple time scales, and ensuring the stable operation of the power grid.

The application provides a power distribution network grid-connected point voltage-power relationship modeling method and system, calculates equivalent access impedance between each grid-connected point and a superior power grid according to a power distribution network topological structure, line parameters and transformer parameters, and constructs an access impedance difference model; a voltage-power relationship model between a grid-connected point voltage and active power and reactive power is established on the basis of considering the access impedance difference, real-time operation data is input into the model to correct and update model parameters, and accurate modeling of a grid-connected point voltage-power change relationship is realized. The application can effectively depict voltage response characteristic differences of different grid-connected points caused by access impedance differences, improve grid-connected point voltage prediction accuracy and regulation reliability, and provides technical support for distributed power grid connection, voltage regulation and reverse power management.

The present application relates to the technical field of energy storage, and discloses a new energy station energy storage control method and device, electronic equipment and storage medium, comprising obtaining the voltage variation and frequency change rate of the power grid accessed by the new energy station; if the voltage variation of the power grid is greater than the voltage variation threshold, power compensation is performed on the new energy station based on the reactive power provided by the inertia flywheel to adjust the voltage variation to within the voltage variation threshold range; if the frequency change rate of the power grid is greater than the frequency change rate threshold, the station demand power of the new energy station, the current state of charge and charge-discharge power upper limit of the inertia flywheel, and the first power relationship between the station demand power and the charge-discharge power upper limit of the inertia flywheel are obtained; based on the station demand power, the first power relationship and the current state of charge of the inertia flywheel, the new energy station is controlled, and the application can improve the ability of the new energy station to respond to power grid disturbances in multiple time scales and ensure stable operation of the power grid.

The application provides a circulating power optimization method and system for a three-phase dual active bridge, and relates to the field of power electronics, and the method comprises the following steps: determining an optimal backflow modulation strategy set corresponding to a mixed modulation group, the mixed modulation group comprising a triangular wave modulation, a trapezoidal wave modulation, a synchronous modulation and an extended phase-shift modulation, the optimal backflow modulation strategy set corresponding to the mixed modulation group comprising modulation modes and freedom degree relationships corresponding to different transmission power standard values in different voltage conversion ratio ranges; determining a freedom degree and power relationship set corresponding to the mixed modulation group, comprising the relationship between the freedom degree and the power of each mode corresponding to different transmission power standard values; combining real-time voltage conversion ratios and real-time virtual power standard values to determine phase-shift angles, primary side duty cycles and secondary side duty cycles, and controlling the three-phase dual active bridge to operate, which has the advantages of reducing complexity, improving portability and efficiency.

The invention discloses a direct-current side impedance simulation modeling method based on a full-power variable-speed pumped storage unit. The method comprises the steps that 1, a full-power variable-speed pumped storage unit machine side main circuit topological structure is established; step 2, constructing a motor speed regulation system and a pump turbine function model, and establishing a small signal relationship between output active power P and mechanical torque Tm; 3, establishing a small signal model of the synchronous motor under the dq coordinate system; 4, establishing a control loop small signal model of the machine side converter; 5, considering the power relationship between the synchronous motor and the machine-side converter, and obtaining a relational expression of variable parameters of the full-power variable-speed pumped storage unit; and step 6, obtaining a direct current side impedance admittance model of the power variable-speed pumped storage unit. The method can effectively improve the accuracy of the DC side impedance modeling of the full-power variable-speed pumped storage unit at the wide frequency band, and can be used for solving the problems of stability evaluation, model parameter sensitivity analysis and broadband oscillation traceability of the hydroelectric generating set.

The invention belongs to the technical field of energy storage, and particularly relates to a mode switching control method, system and equipment for a three-port converter in a hybrid energy storage system and a medium, and the method comprises the steps: obtaining the power demand of a load and the charge state of an electric energy storage device in the hybrid energy storage system, determining the energy flow direction among the load, the electric energy storage device and the hydrogen energy storage device according to the power relationship between the load and the hydrogen energy storage device and the charge state interval of the electric energy storage device, and controlling the three-port converter to switch among three working modes, namely a single-input double-output mode, a double-input single-output mode and a single-input single-output mode. According to the invention, the flexibility and reliability of the three-port converter are effectively improved.

The application discloses a high-efficiency single-stage bidirectional AC-DC converter current construction method and related devices. The method provided by the application first collects the input voltage and input current of the AC side of the single-stage bidirectional AC-DC converter, then converts the collected voltage signal and current signal into voltage components and current components in the coordinate system and the dq coordinate system, respectively, determines the instantaneous power relationship formula in the corresponding coordinate system according to the voltage components and current components in the corresponding coordinate system, and then constructs the orthogonal current relationship equation by simultaneously solving the instantaneous power relationship formulas in the two coordinate systems. The current value of the beta-axis orthogonal current is calculated through the orthogonal current relationship equation. The scheme provided by the application can quickly construct the axis current component without relying on the inductance value of the grid-side input end LC filter, can avoid the influence caused by the error of the inductance value of the LC filter due to the aging of the circuit device, and solves the technical problem of low construction accuracy of the axis orthogonal current component.

This application discloses a grid-connection control method, device, terminal, and medium for an offshore wind power DRU transmission system. The solution provided in this application constructs the power relationship of the wind turbine and calculates the active power reference value and reactive power reference value, thereby generating the d-axis voltage reference value and phase reference value, and using these to control the grid-side converter. This enables the offshore wind power DRU transmission system to actively construct and support the voltage and frequency of the offshore AC network, reducing the dependence on external high-precision global clock signals, effectively improving the stability and reliability of the system under harsh sea conditions, and avoiding the risk of system instability caused by communication interruption or interference.

Systems, methods, and apparatus provide channel state information (CSI) feedback based on one or more codebooks and power back-off values corresponding to the codebooks. A user equipment (UE) (110) receives (404) at least one channel state information (CSI) report configuration from a network entity (120), the at least one CSI reporting configuration includes a codebook entity, one or more power relationship indicators indicating a power relationship between a physical downlink shared channel (PDSCH) and a CSI reference signal (CSI-RS) for each codebook entity, and one or more channel measurement resources (CMRs) associated with the CSI-RS. The UE receives (408) one or more CMRs from the network entity. The UE sends (412) at least one CSI report to the network entity based on the at least one CSI report configuration and the one or more CMRs.

The application provides a laser power correction method and device for inhibiting relaxation oscillation and a laser, and the method comprises the following steps: setting the laser to a first duty ratio and a first frequency, adjusting a current to make an average power a preset power, and recording a current value; adjusting the frequency to make the average power the preset power, recording all frequency values to obtain a frequency interval; changing the duty ratio to obtain the frequency interval under each duty ratio; setting the laser to a second duty ratio and a representative frequency, adjusting the current to make the average power minimum and maximum average power, recording minimum and maximum currents, and determining a current-average power relationship; and changing the duty ratio to obtain the current-average power relationship under each duty ratio and different frequency intervals. The application is suitable for a pulse laser control mode for inhibiting relaxation oscillation and increasing small step signals, and the current-average power relationship is determined by actually measuring a power output value, so that accurate correction of the laser is realized.

The invention discloses an isolation switch fault prediction method and system based on intelligent perception and data analysis, and the method comprises the steps: obtaining the vibration data of a to-be-tested device, and the to-be-tested device comprises an isolation switch and a function device; constructing a power relation graph corresponding to the to-be-tested equipment, and determining switch nodes and function nodes in the power relation graph; determining first graph representation information based on the graph information of the function nodes on the power relation graph; determining first vibration characterization information of the function node and second vibration characterization information of the switch node based on the vibration data; determining a first correlation degree between the function node and the switch node; determining a function weight based on the first relevancy and the device attribute of the function device, and combining the first graph representation information and the first vibration representation information based on the function weight to obtain first comprehensive representation information; and the fault information of the switch node is predicted based on the first comprehensive representation information and the second vibration representation information, so that the risk of cascading failures can be effectively handled.

The invention discloses an energy power pattern prediction method and device and electronic equipment. The method comprises the following steps: acquiring current energy power data (including energy power trade data, energy power technical data and energy power strategy data) corresponding to a plurality of entities in a region; based on the current energy power data corresponding to the plurality of entities, determining energy power relation data corresponding to the plurality of dimensions; constructing a plurality of energy power relation networks based on the energy power relation data corresponding to the plurality of dimensions; according to the plurality of energy power relation networks, determining importance evaluation results corresponding to the plurality of dimensions; and determining an energy power pattern prediction result of the region in the prediction time period according to the importance evaluation results corresponding to the multiple dimensions. According to the method and the device, the technical problem of inaccurate energy and power pattern evaluation among entities caused by incomplete consideration of factors during energy and power relationship network analysis in the prior art is solved.