509 results about "Power rating" patented technology

A charging method based on intelligent dynamic power allocation. The method comprises: acquiring the current SOC, a real-time power demand, a rated power and infrared position detection information of an electric vehicle; on the basis of the current SOC, the real-time power demand, the rated power and the infrared position detection information of the electric vehicle, and in combination with a dynamic average power allocation strategy, a user first-come-first-served allocation strategy, a reverse SOC threshold value incentive strategy and an overall-power utilization maximization strategy, performing power allocation and generating a corresponding control instruction; and controlling the output of a charger topology switch on the basis of the control instruction. Further disclosed is a multi-gun charger apparatus using the charging method. The charging method includes a moderate power allocation strategy and takes into account the demands of both a charger control system and users, and can effectively improve the overall charging efficiency, reduce the charging time, and improve the utilization rate of charging piles.

The invention provides an electric power engineering detection method, system and device and a storage medium, and relates to the technical field of power plant operation management, and the method comprises the steps: determining the remaining bearable power of each normal generator according to the output power and rated power of each normal generator; determining a first power transfer scheme of each normal generator in combination with the residual bearable power and the to-be-transferred load power of the abnormal motor; according to the historical load data, predicting a load change trend of each normal generator in a preset duration, and adjusting the first power transfer scheme according to the load change trend to determine a second power transfer scheme; and adjusting the second power transfer scheme according to the historical operation parameters, determining a target power transfer scheme of each normal generator, and adjusting the output power of each normal generator. The method has the technical effects of accurately transferring and distributing the load power of the abnormal generator and ensuring safe and stable operation of the generator set.

The invention discloses a load decomposition method based on fusion feature data enhancement, and the method comprises the steps: synchronously collecting the low-frequency power data of a bus end of an electrical loop of a building and the low-frequency power data of all electric equipment ends, and generating a confusion power sequence of similar equipment through Beta distribution mixing, so as to enhance the recognition capability of a model for power overlapping features; based on the power time sequence data, extracting a mutation feature, an equipment state feature and a time coding feature to construct a multi-dimensional feature vector; a CNN-BiLSTM double-branch neural network is adopted, spatial-temporal characteristics are fused through a dynamic weight attention mechanism, and equipment state classification and power decomposition tasks are jointly optimized. In practical application, bus end power data is input, and the operation state and power distribution of each electric device are obtained. According to the method, an adversarial training strategy and a gating feature fusion mechanism are innovatively introduced, the load decomposition performance in a complex power utilization scene is remarkably improved, and the method is particularly suitable for identification and power prediction of equipment with similar rated power.

A method of delivering power to a load coupled to an energy module includes determining a power to be produced in a load, generating a signal, and selecting a first or second power amplifier circuit based on the power to be produced in the load. The power rating of the amplifier circuits is different. Another method includes generating a digital waveform having a predetermined wave shape and frequency, converting the digital waveform to an analog waveform, selecting a first power amplifier circuit or a second power amplifier circuit based on a predetermined power output to be produced by the first or second power amplifier circuit into a load coupled to an energy output port of the energy module, coupling the analog waveform to the selected first or second power amplifier circuit, and producing the predetermined power output into the load.

The invention discloses a low-cost charging pile topology for a fast charging-slow discharging scene of an electric vehicle and a modulation strategy of the low-cost charging pile topology. According to the low-cost charging pile topology, a group of half-bridge type shunt diodes are connected in parallel to each phase of main bridge arm of a traditional T-shaped three-level converter. In the discharging mode, the charging pile is consistent with a traditional T-type three-level operation state, and works in a slow-release scene with rated power and below. In the charging mode, the charging pile continuously shunts the main bridge arm power device by using the additionally arranged shunting diode, so that the current stress and thermal stress of the main bridge arm power device are reduced; and through a self-adaptive modulation strategy of three-level / two-level modulation mode switching, the loss distribution of a power device is optimized, the active power output capability of the charging pile in a charging mode is improved, the fast charging operation of the charging pile with over-rated power is realized, the equipment capacity utilization rate of the charging pile is fully excavated, and the method has remarkable engineering application value.

The invention provides a floating type wind wave integrated system dynamic response analysis method, device and equipment, and relates to the technical field of wind power generation, and the method comprises the steps: constructing a three-dimensional twin space, and defining environment conditions, model parameters and static reference points in the twin space; obtaining a near-field drainage basin range and a speed potential of parameter points in the twin space; calculating a frequency domain hydrodynamic load dimensionless coefficient; calculating a wind load, a mooring load and a constraint load; updating the movement speed, acceleration and displacement of the three-dimensional model in combination with the calculation result of the previous time step; and outputting a dynamic response analysis result of the floating storm integrated system. According to the integrated design method for the floating type storm integrated system, the comprehensive coupling floating type storm integrated system is adopted, power production can be stably increased through the integrated design, the cost and the rated power ratio can be reduced, engineering operation and maintenance cost can be shared, and positive dynamic interaction can be achieved.

The invention discloses a method and a device for detecting networking and grid-connected capabilities of a networking type energy storage system, and belongs to the field of power system detection. The method comprises the following steps: disconnecting the energy storage system from an external power grid, testing whether the energy storage system is independently started or not, and establishing a stable voltage; a dynamic power compensation algorithm is adopted to ensure that the voltage and the frequency are kept stable under load fluctuation, and a time domain response analysis method is adopted to ensure that the recovery time is less than or equal to 200ms; the grid-connected power is gradually increased or reduced, and the adjustment and response capability of the system within the rated power range of 0-100% is tested; applying voltage disturbances with different amplitudes, observing the dynamic response of the tested energy storage system, and testing whether the system can operate stably and keep active power output; a main power grid is simulated to be disconnected, whether an energy storage system recognizes and enters an island mode is detected, and the island detection speed is increased by using an improved positive and negative sequence impedance measurement method. A positive and negative sequence impedance measurement algorithm is adopted, the disconnection state of the main power grid is detected more quickly, island detection time is remarkably shortened, and fluctuation of voltage and frequency is reduced.

The invention discloses a synchronous generator excitation method based on mathematical modeling and gain scheduling, and relates to the technical field of synchronous generator control, and the method comprises the steps: building a synchronous generator global dynamic mathematical model comprising the electromagnetic dynamic characteristics of a stator winding, a rotor winding and a damping winding through a modeling module; a discretization simulation platform is constructed in a Matlab / Simulink environment by utilizing a simulation module, model parameters are corrected, dynamic adjustment is realized through a gain scheduling excitation controller, an automatic voltage regulator (AVR) adopts PID (Proportion Integration Differentiation) control and comprises a voltage deviation integral separation strategy, and a power system stabilizer (PSS) dynamically adjusts parameters of a lead-lag compensator based on active power. According to the method, the deviation between a model and an actual system can be reduced by more than 30%, the electromechanical oscillation damping ratio within the rated power range of 10%-150% is increased by 25%-40%, the harmonic content of exciting current is reduced to be lower than 5%, the stability of an electric power system and the electric energy quality are remarkably improved, the engineering practicability is high, and the method is easy to transform and upgrade on an existing synchronous generator.

A method of charging an energy storage system of a wind turbine is provided. The wind turbine includes a power generation system and a power delivery interface. The method includes obtaining a maximum power limit to which electrical power supplied to the external system via the power delivery interface is limited; monitoring an amount of electrical power provided from the power generation system to the power delivery interface or an amount of power generatable by the power generation system; and determining if a predefined condition is met. If the predefined condition is met, the wind turbine is operated in a charging mode in which electrical power generated in addition to a first amount of electrical power is supplied from the power generation system to the energy storage system to charge the energy storage system. The first amount corresponds to a power rating of the wind turbine.

The invention discloses a dynamic load balancing method and device for an intelligent charging pile management system, and the method comprises the steps: obtaining the operation parameters of a target area transformer corresponding to the intelligent charging pile management system in a current control period, so as to obtain the real-time total load of the target area transformer in the current control period; dynamically calculating the real-time available capacity of the transformer based on the rated power and the real-time total load of the transformer in the target station area; calculating the predicted available capacity of the transformer in the next control period through a load prediction model based on the historical power data and the external environment variables; and according to the real-time available capacity and the predicted available capacity, dynamically adjusting the operation power of the plurality of accessed charging piles, and expanding the number of the accessible charging piles in a load trough period. By fusing the real-time power grid state and the multivariable predicted future load demand, the dynamic fine adjustment of the power of the charging pile and the prospective expansion of the off-peak access amount are realized, the safety of the power grid is ensured, and the capacity utilization efficiency of the transformer is remarkably improved.

Embodiments employ Artificial Intelligence (AI) techniques to collect and analyze data associated with material input to a solar module recycling system, including e.g., AI model(s) and / or the recycling and recapture of the component materials. Recycling hardware for various functional areas (e.g., junction box / frame / glass removal; chemical / mechanical / physical separation; testing; sorting; cleaning; others) may be integrated to a central engine for processing and / or storage (e.g., in a database). Analysis of module recycling using the AI techniques may consider one or more of the following: module model; module manufacturer; module type (e.g., c-Si versus CdTe); power rating; module history; module label information; predicted / actual market prices; others. An outcome of AI analysis can offer estimates of resultant effect(s) upon speed and efficiency, by which materials travel through the recycling system. One possible benefit is the ability to rapidly optimize system parameters, providing high solar module throughput in the recycling system over time.

The invention relates to the technical field of electric vehicle charging and discharging, and discloses a power distribution method, system and equipment of a charging and discharging system and a medium, and the type of the charging and discharging system is determined according to the number and connection relation of terminals and system cabinets. The type of the charging and discharging system is a single-terminal cross-cabinet parallel system, and the number of power modules required by the target power distribution unit is adjusted according to the rated power of the power modules distributed by the power distribution units, the total required power of the single terminals and the initial required power of the single terminals to the target power distribution unit. And adjusting the output power of the power module required by each power distribution unit on the basis of the rated power of the power module distributed by the target power distribution unit and the adjusted number of the power modules required by the target power distribution unit under the condition that the total required power of the single terminal is met. The minimum number of power modules can be called under the condition that the power supply requirement of a single terminal is ensured, so that the power utilization rate of the charging and discharging system is improved.

The invention provides an operation power identification method and device of a reciprocating compressor, a medium and equipment. The operation power identification method comprises the steps that valve state information of all air cylinders in the reciprocating compressor in a detection period is obtained; and determining the total power of the reciprocating compressor according to the valve state information and the rated power of each cylinder. The working state of each cylinder in the detection period is determined through the valve state information, and is further combined with the rated power of each cylinder, so that the total power of the reciprocating compressor is accurately identified, and the management accuracy of the reciprocating compressor is guaranteed.

The invention relates to the field of semiconductor device testing, and discloses a power device thermal resistance testing method and power device thermal resistance testing equipment, and the method comprises the following steps: controlling an environment to rise to a first preset temperature in a temperature gradient manner, and sequentially applying a calibration current to a power device at each temperature gradient to test a first forward voltage drop of the power device; calibrating the power device according to the temperature value of each temperature gradient and the first forward voltage drop value corresponding to each temperature gradient to obtain a temperature-voltage drop curve; controlling the environment temperature to be a second preset temperature, applying a first rated power to control the power device to reach a heat balance state, applying a calibration current to the power device to test a second forward voltage drop of the power device, and measuring the shell temperature of the power device; and obtaining the thermal resistance of the power device according to the temperature-voltage drop curve, the second preset temperature, the second forward voltage drop, the first rated power and the shell temperature of the power device. According to the invention, the problem of inaccurate thermal resistance test of the power device is solved.

A system and method for operating a fleet of pumps for a turbine driven fracturing pump system used in hydraulic fracturing is disclosed. A method of operating a fleet of pumps associated with a hydraulic fracturing system includes receiving a demand Hydraulic Horse Power (HHP) signal. The demand HHP signal may include the Horse Power (HP) required for the hydraulic fracturing system to operate and may include consideration for frictional and other losses. The method further includes operating all available pump units at a percentage of rating below Maximum Continuous Power (MCP) level, based on the demand HHP signal. Furthermore, the method may include receiving a signal for loss of power from one or more pump units. The method further includes operating one or more units at MCP level and operating one or more units at Maximum Intermittent Power (MIP) level to meet the demand HHP signal.

The invention relates to the technical field of hydroelectric generation, and discloses a power distribution method, device and equipment of a hydroelectric generating set, a medium and a product, the power distribution method of the hydroelectric generating set comprises the following steps: determining a plurality of preliminary power distribution schemes according to the power grid demand power and the rated power of the hydroelectric generating set; determining a target damage index and a target efficiency index corresponding to each preliminary power distribution scheme according to the working condition data of the plurality of hydroelectric generating sets in each preliminary power distribution scheme; fusing the target damage index and the target efficiency index to obtain a health degree corresponding to each preliminary power distribution scheme; according to the health degree, a target power distribution scheme is selected from the multiple preliminary power distribution schemes, and power is distributed according to the target power distribution scheme, the health degree is obtained by fusing the target damage index and the target efficiency index, the target power distribution scheme is selected according to the health degree, and the accuracy of the target power distribution scheme is improved.

The invention discloses a power distribution network voltage regulation-oriented energy storage configuration method. The method comprises the following steps of: establishing a power distribution network node out-of-limit voltage active sensitivity calculation model; energy storage access positions and number are determined according to node out-of-limit voltage active sensitivity; establishing a target function, and solving the optimal solution of the charge and discharge power value of the energy storage; adding the energy storage charging and discharging power value into historical operation data of the power distribution network, obtaining voltage data after energy storage operation through load flow calculation, if voltage out-of-limit still exists, continuing to calculate node out-of-limit voltage active sensitivity, retaining original energy storage access, accessing new energy storage according to the newest node out-of-limit voltage active sensitivity, and completing the energy storage operation according to the newest node out-of-limit voltage active sensitivity. Recalculating the optimal charging and discharging power of all stored energy, and circulating until no voltage exceeds the limit; and determining all energy storage access positions according to the optimal solution of the charging and discharging power values of the last energy storage, and calculating the rated capacity and the rated power value of the energy storage according to the charging and discharging power values of the energy storage. According to the invention, the accuracy and rationality of energy storage configuration are improved.

The invention relates to the technical field of anti-electromagnetic interference, and provides a Type-C interface power supply surge protection design method. Comprising a Type-C interface power supply, and the Type-C interface power supply is composed of a Type-C interface, a transient suppression diode D4 and a chip end. The design method comprises the steps of obtaining an initial circuit schematic diagram and a surge protection requirement of a Type-C interface, and determining rated voltage, rated power and response time of the Type-C interface; determining a first electrical characteristic that the Type-C interface generates low-voltage surge interference according to the rated voltage and the rated power, and configuring multiple TVS transient voltage suppressor diodes at the output end of the Type-C interface to generate a first circuit schematic diagram; acquiring a second electrical characteristic after the configuration of the multiple TVS transient voltage suppressor diodes, and configuring a plurality of common-mode inductance filters at the output ends of the multiple TVS transient voltage suppressor diodes to generate a second circuit schematic diagram; and according to the second circuit schematic diagram, generating a Type-C interface to be verified, and performing a low-voltage surge test.

The invention relates to the technical field of inertia support of a new energy power system, and particularly discloses a power grid inertia support method and system based on a double-shaft excitation phase modifier, and the method comprises the steps: obtaining the frequency and voltage of a key node of a power grid through a phase-locked loop; determining a transient frequency stability evaluation index according to the rated power of the power grid, the frequency of the key node, the longest duration of the frequency in each frequency band and the weight coefficient; determining a system frequency condition according to the frequency of the key node and a transient frequency stability evaluation index; when the frequency condition of the system is unstable, controlling the double-shaft excitation phase modifier to emit or absorb active power to the power grid until the frequency condition of the system is stable, and absorbing or emitting the active power from the power grid through the frequency double-shaft excitation phase modifier, so that the rotating speed of the motor is recovered to the synchronous speed; and when the system frequency condition is stable, the double-shaft excitation phase modifier is controlled to send reactive power to the power grid or absorb reactive power.

The invention relates to the technical field of intelligent control, in particular to a remote control method, device and equipment for a safe, energy-saving and environment-friendly intelligent terminal, and the method comprises the steps: obtaining historical power, rated power, actual power and actual temperature data of a historical time period and a current time period on a parallel branch; according to the difference among the historical power, the rated power and the actual power of the parallel branches, analyzing the load abnormal condition of the parallel branches, and screening the parallel branches to determine abnormal branches and balanced branches; according to the difference between the actual power of the balance branch in the current time period and the historical time period and the difference between the actual temperature data of the current time period and the historical time period, a load balance auxiliary index is obtained by combining the load abnormal condition and the power adjustment degree of the balance branch in the current time period; and performing balance control on the load on the parallel branch according to the actual power, the power adjustment degree and the load balance auxiliary index of all the abnormal branches in the current time period. According to the invention, the load balancing efficiency is improved, and the power utilization safety is ensured.

The invention discloses an active power control method for a flyback topology micro inverter system, and the method comprises the steps: calculating the load power of a load end through a current sampling module, and carrying out the uniform power distribution of a PV primary side branch when the load power is greater than or equal to the rated power of an inverter system; when the load power is smaller than the rated power of the inverter system, the PV primary side branch is closed step by step according to the load power difference; and when the load power is smaller than the minimum set power sum, one PV primary side branch is kept to operate. When the load power is smaller than the minimum set power, all the PV primary side branches are closed, and when the load power is larger than the minimum set power of the PV primary side branch with the lowest minimum set power, the system is started. According to the invention, multi-path regulation and control can be realized, and the control stability of the system is improved. And uniform distribution control, step-by-step adjustment distribution control, minimum power control and active power control are relatively flexible and efficient, so that the service life of the system is remarkably prolonged, and the reliability of the system is remarkably improved.

The invention relates to a flexible DC converter based on a virtual synchronous motor, and a control method and system, and belongs to the technical field of electrical engineering. When an AC system fails, an active amplitude limiting coefficient, a reactive amplitude limiting coefficient and a current amplitude limiting coefficient are obtained through an AC voltage amplitude; multiplying the positive and negative active amplitude limiting coefficients by the rated power of the converter to obtain upper and lower limits of an active power reference value of an active virtual rotating speed control ring controlled by the virtual synchronous motor; multiplying the positive and negative reactive power amplitude limiting coefficients by a reactive power output upper limit of the system to obtain an upper limit and a lower limit of a reactive power reference value of a reactive power droop control ring controlled by the virtual synchronous motor; and multiplying the current amplitude limiting coefficient by the maximum allowable current set value during normal operation to obtain the upper limit of the current reference value of the current inner loop controlled by the virtual synchronous motor. The converter can also operate in a network construction type control mode during a fault period, and the maximum operation capability of equipment is exerted to support transient and steady stable operation of an alternating current power grid.

A charger mounted on an electrified vehicle includes a power converter that converts input electric power supplied from an external charging power source into charging power supplied to a battery mounted on electrified vehicle, and a control device that controls an operation of the power converter, wherein the control device decides a maximum value of the input electric power supplied from the charging power source to the power converter, and intermittently operates the power converter based on the decided maximum value of the input electric power and the rated power of the power converter.

The invention discloses an intelligent dynamic power distribution charging method and a multi-gun charger device. The intelligent dynamic power distribution charging method comprises the steps that the current SOC, the real-time power requirement, the rated power and infrared position detection information of an electric vehicle are acquired; based on the current SOC, the real-time power demand, the rated power and the infrared position detection information of the electric vehicle, power distribution is carried out in combination with a dynamic average power distribution strategy, a user first arrival first arrival distribution strategy, a reverse SOC threshold excitation strategy and a whole machine power maximum utilization strategy, and a corresponding control instruction is generated; performing control output of a charger topology switch based on the control instruction; the method comprises a moderate power distribution strategy, gives consideration to the demands of a charger control system and all parties of a user, can effectively improve the overall charging efficiency, reduces the charging time, and improves the utilization rate of the charging pile.

The invention discloses a load matching method of a tested power supply and related equipment. The method comprises the following steps: acquiring rated voltage, rated current and rated power of a tested power supply, drawing a power supply parameter curve based on the group of parameters, and determining a current turning point from the power supply parameter curve; according to the magnitude relationship between the actual output voltage of the tested power supply and the voltage corresponding to the current turning point, the rated current or rated power is flexibly selected as a reference basis to determine the resistance value of each load in the load box; and finally, selecting a plurality of loads connected in parallel from the load box as test loads according to the actual output voltage, and ensuring that the actual output current of the tested power supply reaches the rated current or the actual output power reaches the rated power. The rated current or the rated power is dynamically switched through the current turning point to serve as a reference basis, the load requirements of the tested power supply in different voltage intervals are accurately adapted, and the adaptability of load matching is greatly improved.

The invention relates to a three-phase power dynamic distribution method, a three-phase inverter and a control unit for the three-phase inverter. The method comprises the following steps: S1, obtaining an inversion power parameter value of each phase, obtaining an electric meter power parameter value of each phase, and obtaining a rated power parameter value of the inverter; s2, calculating the overload power of each phase according to the inverter power parameter value, the ammeter power parameter value and the rated power parameter value, and then generating the overload state of each phase according to the overload power of each phase; and S3, according to the inversion power parameter value of each phase, the rated power parameter value of the inverter and the overload state of each phase, obtaining the power amplitude limiting value of the current overload state. According to the scheme provided by the invention, the distribution result with lower overload power and higher power balance degree of each phase is calculated on the premise of meeting the maximum utilization of the power, and the negative influence caused by long-term overload of a certain phase can be remarkably reduced.

The embodiment of the invention discloses a pressure control method and system for a once-through steam generator of a nuclear reactor, and relates to the technical field of nuclear power. Determining power deviation according to the operation power and the secondary circuit load; according to the power deviation, the rated power corresponding to the nuclear reactor and the rated feed water flow corresponding to the once-through steam generator in the nuclear reactor, pressure regulation information is determined; and adjusting the pressure of the once-through steam generator according to the pressure adjusting information. According to the embodiment of the invention, a PID controller is not needed in the process of determining the pressure regulation information, but the pressure regulation information determined based on the power deviation directly acts on the feed water flow regulation valve, so that rapid and accurate OTSG pressure control can be realized.

The invention provides a module power redundancy dynamic switching control system, and relates to the technical field of power system redundancy control, and the system comprises a plurality of power modules which are connected with a plurality of loads through a switch module; the switching controller is used for calculating the power redundancy in real time according to the total load power of each load and the rated power and the peak efficiency of each currently-input power module, so as to control the action of the switch module; and the number of the currently input power modules is adjusted, so that the power redundancy is greater than zero and is not greater than the minimum value of the rated power of each currently input power module. The method has the advantages that the number of redundant modules can be automatically adjusted according to the load rate, the problem that faults of a traditional non-redundancy scheme are prone to diffusion is solved, the defect that redundancy of a fixed redundancy scheme is insufficient or excessive is avoided, and the average load rate of the modules is optimized to the efficient interval of 60%-80% while reliability is guaranteed.

The invention discloses a hybrid power parameter determination method and device and electronic equipment, and relates to the field of vehicle design, and the method comprises the steps: determining the engine displacement of which the average operation power of an engine is consistent with a target fuel consumption area according to the average operation power, the torque standard deviation, the maximum torque fluctuation value and the fuel type in a vehicle road spectrum; according to the method, the determined engine can work in the interval with higher efficiency, the fuel economy is improved while the conventional power requirement is met, and the engine cost is reduced. The rated power of the motor is further determined according to the maximum operation power in the vehicle road spectrum and the target engine external power, and the target engine external power is the external power corresponding to the target vehicle speed or the target rotating speed under the maximum operation power. And determining the battery capacity according to the rated power of the motor, the climbing duration in the vehicle road spectrum and the battery adjustment coefficient. And on the basis of the engine, motor driving is matched to increase the endurance mileage, and the economy of the whole vehicle is improved.

The invention discloses an electricity consumption information monitoring method and system based on hardware industry electric power big data, and belongs to the technical field of electric power information monitoring, and the method comprises the steps: S1, calculating segmented energy consumption data and classified energy consumption data based on electricity consumption data; s2, correcting the classified energy consumption data based on the working duration and rated power of the production equipment, and detecting whether the classified energy consumption data is abnormal or not; s3, constructing a fitting function by using the classified energy consumption data, the raw material feeding data and the finished product data, and judging whether the fluctuation information is abnormal or not; s4, judging the relationship between the power consumption data of the hardware feeding equipment and the threshold value to determine whether to adjust the feeding speed; s5, calculating the number of theoretical products based on the power consumption of the heating equipment, and adjusting the feeding speed if the actual number is smaller than a theoretical value; and S6, judging whether the heating equipment is abnormal or not according to the load current of the die forging equipment, and sending warning information. According to the scheme, multi-level power fault analysis is carried out on the hardware industry, so that the coverage range of power fault detection can be remarkably expanded.