451 results about "Power limits" patented technology

The invention discloses a self-generating and self-using distributed photovoltaic power station power anti-countercurrent control method and system, and relates to the technical field of photovoltaic anti-countercurrent control, and the method comprises the steps: obtaining the real-time load power of a grid-connected point of a power grid and the output power of a photovoltaic inverter, and calculating the net load power deviation; when the net load power deviation is smaller than a preset countercurrent risk threshold value, it is judged that a countercurrent risk exists, and an anti-countercurrent adjusting instruction is generated; in response to the anti-countercurrent regulation instruction, dynamically correcting the maximum output power limit value of the photovoltaic inverter, and synchronously activating the charge and discharge compensation mode of the energy storage system; an anti-countercurrent control coefficient is calculated, and the power reduction proportion of the photovoltaic inverter and the compensation power of the energy storage system are synchronously adjusted based on the anti-countercurrent control coefficient, so that the power flow of the grid-connected point of the power grid is kept to be zero or forward flow; according to the method, dynamic and accurate cooperation of photovoltaic reduction and energy storage compensation power in time and magnitude is realized, and the efficiency of a self-generating and self-using distributed photovoltaic power station is improved.

The invention discloses a charging and discharging strategy optimization method for a battery swap station. The method comprises the steps of S1, collecting historical battery swap requirements, battery inventory states and time-of-use electricity price data of the battery swap station; s2, constructing a battery replacement demand prediction model with online parameter updating capability, and outputting a battery replacement demand sequence of a plurality of time steps in the future in a prediction time domain in a rolling manner; s3, calculating the minimum safe inventory required to be maintained for satisfying future service in the prediction time domain, and further determining a dynamic safe operation interval of the battery inventory state; s4, constructing a charging and discharging strategy optimization problem with operation economy as a target, and generating an optimal power decision by combining battery inventory dynamics and power limitation; and S5, solving the charging and discharging strategy optimization model, obtaining a charging and discharging power decision sequence in a prediction time domain, entering a next time step, and repeating the steps S2 to S5. According to the method, the future demand is converted into the inventory hard constraint reflecting the service capability, so that the operation cost is minimized on the premise of ensuring zero interruption of the battery replacement service.

A motor control device is provided in a vehicle equipped with a plurality of motors connected to a battery. The motor control device includes processors corresponding to the motors respectively. Each of the processors derives first power, derives second power, transmits information indicating the second power to another processor, acquires information indicating the second power derived by the another processor, derives third power, acquires fourth power, acquires a power limit value of the battery, derives a control power limit value, distributes the control power limit value to the motor corresponding to the own processor based on an axle torque ratio of the plurality of motors, derives an individual power limit value of the battery for the motor, derives a power correction amount of the first power, corrects the torque instruction value of the motor corresponding to the own processor, and operates the motor according to the corrected torque instruction value.

According to the doubly-fed wind turbine generator fault ride-through control method and system provided by the invention, a refined interval segmentation mechanism based on a voltage amplitude is introduced, reactive power coefficients under different falling or lifting depths are dynamically adjusted, and reactive power limits of the rotor-side converter and the grid-side converter are combined, so that the fault ride-through control of the doubly-fed wind turbine generator is realized. Reactive power optimal distribution of rotor side priority and network side auxiliary coordination is realized; furthermore, active feed-forward compensation is introduced to the grid side to quickly suppress DC bus voltage fluctuation, and a dynamic amplitude limiting strategy based on a current circle is adopted to the rotor side, so that the risks of rotor overcurrent and DC overvoltage are effectively suppressed while the power grid voltage recovery is supported in a full-force manner, and the reliability of the system is improved. Therefore, the ride-through capability and the operation safety of the doubly-fed wind turbine generator in the power grid fault period are remarkably improved, and reliable technical guarantee is provided for avoiding large-area off-grid of the generator.

The invention provides a fault protection and dynamic limited power control method and system for a 48V electronic water pump. The fault protection and dynamic limited power control method comprises the steps that the preset real-time working current and the real-time pump body temperature of the 48V electronic water pump are obtained; performing weighted fusion calculation on the real-time working current and the real-time pump body temperature to generate a comprehensive state index; comparing the comprehensive state index with a preset water pump reference operation range to judge whether a preset grading response mechanism is triggered or not, and generating a judgment result; when the judgment result is that the grading response mechanism is triggered, calling a power limiting mode corresponding to the comprehensive state index from a preset mode mapping table; and the power limiting mode is applied to adjust the driving power of the preset 48V electronic water pump, and a preset fault protection strategy corresponding to the power limiting mode is executed. According to the invention, refined fault protection and power management of the 48V electronic water pump are realized, the problem of excessive response or insufficient response of a traditional single threshold protection mode is avoided, and the adaptability and reliability of the system under complex working conditions are improved.

A system includes a traction battery and a controller. The traction battery includes first and second arrays of battery cells. The controller is programmed to implement first and second filters, such as first and second bar-delta filters, configured to respectively generate output indicative of a state-of-charge (SOC) of the first and second arrays from models of the first and second arrays. The controller is further programmed to charge and / or discharge the traction battery according to power limits defined by the SOC of the first and second arrays.

The invention relates to the technical field of power distribution control, and discloses a power grid interactive charging pile power intelligent distribution method and system, and the method comprises the following steps: 1, obtaining the power limit of a power grid, the capacity of a transformer, the safety margin and a non-charging load, and calculating the station-level distributable power; 2, collecting user target and vehicle state data, and calculating target reference power; step 3, determining physical upper limits in a classified and segmented manner, comparing and marking limits, and grading to obtain urgency indexes and constraint labels; step 4, performing correlation analysis based on the urgency degree and the constraint, generating a target tracking weight and setting a smoothing coefficient; step 5, under the constraint of distributable power, setting and optimizing a single adjustment parameter to obtain final power; and step 6, applying a climbing speed limit, quantifying and issuing a power instruction, monitoring an equipment state and redistributing the equipment state in an off-line state. According to the invention, the fair, efficient and stable distribution of the multi-session charging demand is realized while the charging pile meets the power grid safety.

The invention relates to the technical field of power equipment inspection data processing methods, in particular to a Grouping-DINO model acceleration method combined with a multi-stage progressive multi-mode distillation mechanism. According to the method, through the whole process of data set construction, lightweight model design, three-stage progressive multi-mode distillation and deployment optimization, the core pain point of electric power inspection is systematically solved. Firstly, a training foundation is built by using an electric power scene adaptive data set, and then a lightweight student model conforming to edge equipment computing power limitation is designed in a targeted manner, so that the problem of computing power mismatching of a general model is avoided; key points are that teacher model capability is migrated by stages by means of a three-stage distillation mechanism, lightweight precision loss is made up in combination with special optimization for an electric power scene, and edge equipment is further adapted through deployment optimization; finally, the technical problem that the routing inspection detection precision is reduced due to the fact that adaptation optimization is not carried out for the layered structure, the shielding characteristic and the terminology instruction of the power equipment is solved.

Provided are a power control method and terminal devices. The method comprises: a terminal device determining transmit power of a first sidelink signal in shared spectrum based onfollowing information: first transmit power, determined based on a power limit; second transmit power, determined based on a maximum transmit power of the terminal device; and fourth transmit power, determined based on a downlink path loss or the second transmit power.

The invention relates to the technical field of photovoltaic power station intelligent monitoring, and discloses a distributed photovoltaic power station monitoring management method and system based on a cloud platform, and the method comprises the steps: collecting the operation parameters of a photovoltaic string; applying bounded perturbation in a stable interval of maximum power point tracking to obtain a feature vector; and constructing a topological graph, and reconstructing a virtual current and voltage characteristic curve and key characteristic points. And obtaining a node-level health index on the topological graph, and generating an abnormal score in combination with the reference distribution. And according to the shape deviation of the virtual current and voltage characteristic curve and the distribution of the node-level health indexes, positioning an abnormal string and an affiliation node thereof, solving the optimization problem of power generation income, degradation risk and power fluctuation under the condition of satisfying parameter constraints, and obtaining an active power limit and a power factor control track to be issued to an edge node for execution. According to the invention, the diagnosis precision and the grid-connected stability of the distributed photovoltaic power station in a large-scale scene are improved, and the expandability and the intelligent level are improved.

The invention relates to the technical field of charging piles, in particular to a charging pile control method and system for a large-current new energy heavy truck, and the method comprises the steps: building a demand power fluctuation curve of a plurality of charging piles in a charging station based on the charging power data of the charging station at a plurality of historical time points; determining a power overall limit time period and overall limit power of the overall power limit time period based on the theoretical maximum power and the demand power fluctuation curve; determining individual limited power of each charging pile based on the temperature prediction data of the current day; constructing an optimization model based on the total limited power and the individual limited power, and solving the optimization model to obtain the optimal operation power of the plurality of charging piles in the charging station; and performing power limitation control based on the optimal operation power of the plurality of charging piles in the charging station. The total power of the charging station and the individual power of the charging station can be limited under the condition that charging is not affected, power failure of a trigger protection mechanism is avoided, heating is reduced, electric energy is saved, and heat dissipation pressure is reduced.

The present application belongs to the technical field of power generation project benefit evaluation, and discloses a new energy power generation project benefit evaluation method and system based on multi-dimensional coupling, comprising: performing compliance verification on the pre-acquired attenuation parameters and output data, combining a pre-set environmental operation correction factor to construct a device performance degradation dynamic model, and performing output correction on the verified output data; verifying the pre-acquired power grid power limiting parameters by using normative verification, constructing a power limiting strategy multi-dimensional constraint condition, and performing power limiting constraint on the corrected theoretical output data based on the power limiting strategy multi-dimensional constraint condition; performing physical constraint verification on the pre-acquired energy storage parameters, combining a pre-set safety constraint to construct an energy storage optimization scheduling model, and combining the actual output data to perform charging and discharging strategy optimization, and performing power generation project benefit evaluation according to the charging and discharging strategy optimization result. The present application can solve the economic prediction distortion problem under the power consumption capacity limited scenario.

The invention discloses a power supply voltage monitoring device system based on edge calculation, and the system comprises a data collection and preprocessing module which is used for collecting and preprocessing voltage data, and generating a voltage time sequence data sample; the edge clustering analysis module is used for carrying out adaptive fuzzy C-means clustering and bald eagle search optimization to obtain a clustering center and a membership matrix; the state classification and abnormity identification module is used for carrying out state classification on the voltage data of each monitoring point and generating an abnormity identification mark; the alarm and linkage control module is used for automatically triggering local alarm, power failure or power limiting measures for abnormal monitoring points; the communication and data uploading module is used for uploading the abnormal data and the alarm information to a remote management platform; and the visualization and operation and maintenance management module is used for visually displaying abnormal information, archiving historical data and assisting operation and maintenance management. Intelligent monitoring, abnormity identification and quick response of the power supply voltage are realized, and the safety and reliability of a power grid are improved.

A method and system for protecting a battery power limit, and a storage medium are disclosed. The method for protecting a battery power limit is applied to a vehicle with a battery management system. The method includes: acquiring temperature data, a state of charge, and a cell voltage extreme value of a battery, periodically; calculating a current maximum available power according to the temperature data and the state of charge; determining a power limit coefficient according to the cell voltage extreme value, and a voltage limited power interval corresponding to the temperature data; and obtaining an actual available power that the battery management system allows the vehicle to use according to the maximum available power and the power limit coefficient. According to the method, different temperature ranges can be adapted according to logic.

The invention relates to a V2G station power control method and system and computer equipment. The method comprises the steps of collecting operation data of a V2G station in a current control period or a current control time period; when it is judged that the V2G station triggers a power control event according to the operation data, smooth power is obtained according to the operation data; obtaining a power deviation according to the target power reference and the smooth power; acquiring smooth compensation power according to the compensation coefficient, the total maximum adjustable power and the power deviation; decomposing the smooth compensation power according to a to-be-compensated target object, and generating a compensation power instruction corresponding to the to-be-compensated target object; and issuing the compensation power instruction to the corresponding to-be-compensated target object so as to perform power compensation on the to-be-compensated target object. According to the invention, a traditional control mode adopting a fixed power amplitude limiting, simple filtering or centralized scheduling mode is changed, the response speed, the compensation precision and the station income are considered, and smooth, stable and high-robustness power control is realized.

The invention provides a communication method and device, which can improve the flexibility of limiting the preamble transmitting power, and improve the communication performance of terminal equipment while ensuring that a protected receiving device is not interfered. The method comprises the following steps: receiving configuration information, wherein the configuration information is used for indicating power control parameters respectively corresponding to a plurality of areas; the plurality of areas are divided based on the relative position between the non-ground network NTN equipment and the protected receiving device; when the preamble transmitting power of the terminal equipment is greater than or equal to a power threshold value, interference is generated on a protected receiving device, the power control parameter is used for indicating the preamble transmitting power, and the preamble transmitting power is smaller than the power threshold value; and in the case of the first region, sending a random access request message to the NTN device based on the power control parameter corresponding to the first region, the plurality of regions including the first region.

The present invention provides an air-conditioning device which can effectively utilize the air-conditioning (cooling) capability while controlling the use power within the power limit of a power supply in a relatively small air-conditioning device in which a condenser is disposed below an evaporator. An air conditioner (100) is provided with a case (60) that houses a control device (50) and a refrigerant circuit (R) having a compressor (10), a condenser (20), an evaporator (30), and an expansion device (40), the control device (50) having an operation upper limit value determination unit (502), a rotational speed command value determination unit (503), and a compressor rotation control unit (506), the operation upper limit value determination unit (502) determining the rotational speed command value of the compressor (10) in accordance with the load on the compressor (10), and the compressor rotation command value determination unit (503) determining the rotational speed command value of the compressor (10) in accordance with the rotational speed command value of the compressor (10). A rotational speed command value determination unit (503) performs control for determining an operation upper limit value (Rrmax) of a compressor (10), and performs control for determining a rotational speed command value (Rc) on the basis of a target discharge temperature (Ttgt) and a current rotational speed (Rnow) of the compressor (10) in a state in which the load is relatively low, and for determining the current rotational speed (Rnow) or the operation upper limit value (Rrmax) as the rotational speed command value (Rc) in a state in which the load is relatively high, and for determining the current rotational speed (Rnow) or the operation upper limit value (Rrmax) as the rotational speed command value (Rc) in a state in which the load is relatively high. The compressor rotation control unit (506) drives and controls the compressor (10) on the basis of the rotation speed command value (Rc).

The application relates to the technical field of hybrid power equipment, and provides a hybrid power equipment parking regeneration control method, a hybrid power equipment and electronic equipment. The hybrid power equipment parking regeneration control method comprises the following steps: receiving a parking regeneration signal; acquiring a current battery power of a power battery of the equipment; determining that the current battery power is less than a power limit value, controlling the equipment to enter a parking charging mode and a parking regeneration mode, wherein, based on the current battery power reaching the power limit value, the parking charging mode is stopped, and the parking regeneration mode is continuously run until the parking regeneration mode ends; and determining that the current battery power is greater than or equal to the power limit value, controlling the equipment to enter the parking regeneration mode. The hybrid power equipment parking regeneration control method provided by the application can accurately control the parking power generation and the parking regeneration process of the equipment by accurately judging whether the parking power generation and the parking regeneration are synchronously run, so that fuel can be saved and the regeneration time can be shortened.

The present application relates to the technical field of wind farm active wake control, and discloses an active wake control method and device suitable for wind farm limited power operation, wherein the present application combines the active scheduling suggestion of the unit affected by the wake influence level, matches the actual information of limited power and shutdown, customizes the wake optimization control strategy in the limited power mode and the non-limited power mode, accurately adapts to the real-time operation working condition of the station, can fully consider the actual wake effect loss and the unit fatigue damage, avoids the wake redirection misalignment problem caused by the mismatch between the strategy and the field working condition, effectively improves the adaptability and reliability of the wake control strategy, guarantees that the wake redirection always plays a positive benefit effect, and greatly reduces the benefit loss caused by the strategy failure.

The invention relates to the technical field of batteries, in particular to a battery power control method and device, electronic equipment, a medium and a program product. Acquiring the current vehicle state of the target vehicle; determining an output power limit level corresponding to a target battery in the target vehicle according to the current vehicle state of the target vehicle; and controlling the output power of the target battery according to the output power limit level corresponding to the target battery. Therefore, the acceleration performance can be guaranteed while the target vehicle runs normally, short-time high-power output of the target battery in an emergency can be met, meanwhile, the experience of operation consistency and stability of a driver is guaranteed, and the comfort and safety of the target vehicle are further improved.

The application discloses a battery swap station charging and discharging strategy optimization method, steps comprising: S1, collecting the historical battery swap demand, battery inventory state and time-of-use electricity price data of the battery swap station; S2, constructing a battery swap demand prediction model with online parameter updating capability, and rolling outputting a battery swap demand sequence of multiple time steps in a prediction time domain; S3, calculating the minimum safety inventory required to meet future services in the prediction time domain, and then determining the dynamic safety operation interval of the battery inventory state; S4, constructing a charging and discharging strategy optimization problem with operation economy as the target, and generating an optimal power decision in combination with the battery inventory dynamics and power limit; S5, solving the charging and discharging strategy optimization model to obtain a charging and discharging power decision sequence in the prediction time domain, and repeating steps S2 to S5 in the next time step. The application realizes the minimization of operation cost on the premise of guaranteeing the zero interruption of battery swap service by converting the future demand into an inventory hard constraint reflecting the service capacity.

The present disclosure provides techniques for reporting of granular information related to a station device's uplink power headroom (UPH) in trigger-based transmissions. A client device identifies one or more power limit reasons that constrain a maximum transmit power of the client device. The client device determines an UPH based on a difference between the maximum transmit power and a current transmit power of the client device. The client device transmits a message to an access point (AP), including the UPH and the one or more power limit reasons. Based on the received information, the AP determines a target RSSI for the client device. The client device receives the target RSSI and an AP transmit power level from the AP, and defines an uplink transmit power as a function of the AP transmit power level and the target RSSI.

The invention discloses an energy management method and device of a fuel cell vehicle and a nonvolatile storage medium. The method comprises the steps that the whole vehicle required power of the fuel cell vehicle is obtained; selecting a target output power gear of which the equivalent power meets a preset condition from a plurality of output power gears corresponding to the fuel cell; according to a preset corresponding relation between the output power gear and the output power of the fuel cell, selecting the output power corresponding to the target output power gear as the initial output power of the fuel cell; determining target output power corresponding to the fuel cell based on a power limiting rule corresponding to the fuel cell and the initial output power; and determining target output power corresponding to the power battery based on the vehicle demand power, the power limiting rule corresponding to the power battery and the initial output power of the fuel battery. According to the invention, the technical problem that the power determination of the current fuel cell vehicle is only adjusted through an optimization algorithm or a rule, has certain limitation and cannot adapt to various scenes is solved.

The application discloses a kind of range-extended electric vehicle parking power generation control methods, comprising the following steps: step S10, parking power generation function is opened;Step S20, whether MP5 end selects efficient mode, if yes, then step S21 is carried out, if not, then step S22 is carried out;Step S21, VCU is based on battery charging power limit, from range extender efficiency Map, select optimal oil-electric conversion efficiency power point, request range extender power generation, then step S30 is carried out;Step S22, whether MP5 end selects "speed" charging mode, if not, then step S23 is carried out, if yes, then step S24 is carried out.The application solves the problem that existing battery will appear battery overcharge in the process of parking charging, seriously damage the health and life of battery, and synchronously solves the problem that battery cell temperature will be reduced in winter environment temperature is lower, battery cannot reach full power charging state, reduces battery charging efficiency.

This invention discloses a method and apparatus for determining the power limit value of a power battery. The method includes: acquiring target operating condition data of the vehicle; determining a first power limit ratio value of the power battery in a pulse temperature rise table based on a first temperature value and the target temperature value of the power battery; determining a second power limit ratio value of the power battery based on the vehicle's power performance target data and target evaluation data; determining the minimum value between the first and second power limit ratio values ​​as the target power limit ratio value of the power battery; and determining the power limit value of the power battery based on the target power limit ratio value and the allowable power value of the power battery. This invention solves the technical problems that high-temperature power limit protection methods for batteries cannot cover operating conditions with fast vehicle speed response, and cannot simultaneously consider the safety of battery and vehicle use, vehicle power performance, and user experience.

The invention discloses outdoor walking equipment which comprises a walking mechanism which comprises a first driving wheel, a second driving wheel, a first walking motor and a second walking motor, and the first walking motor and the second walking motor respectively and independently drive the first driving wheel and the second driving wheel; a power limiting unit configured to limit an input power of the first travel motor or the second travel motor; the controller is configured to control the first walking motor to enter a power limiting mode through the power limiting unit when the electrical parameter of the first walking motor meets a preset condition; outputting a corresponding rotating speed attenuation factor based on the rotating speed of the first walking motor in the power limiting mode; and correcting the second target rotating speed based on the rotating speed attenuation factor to drive the second walking motor to rotate. The outdoor walking equipment is safe in driving.

This application discloses a control method, apparatus, and parallel system for a parallel system, belonging to the field of photovoltaic-storage systems. The control method for the parallel system includes: in the event of a communication link failure in the parallel system, determining target adjustment parameters for each disconnected subsystem based on a first total power generation capacity corresponding to the equipment connected to the disconnected subsystem and a second total power generation capacity of the parallel system; and controlling the operation of each subsystem based on the target adjustment parameters. The control method of this application enables each disconnected subsystem to continuously perform local power scheduling within permissible power limits, maintaining the normal operation of the parallel system to meet power demand, reducing the probability of shutdown, reducing the curtailment rate, and effectively improving the utilization rate of photovoltaic-storage equipment.

The application relates to a power control method, device, equipment, storage medium and vehicle, and relates to the technical field of vehicle control. The method comprises the following steps: obtaining a target driving power of a vehicle and an equivalent factor, and determining a first power generation power of a power generator set according to the equivalent factor and a power generation power limit of the power generator set. Further, the target power generation power of the power generator set is determined according to the target driving power, the first power generation power, a charge-discharge power limit of a power battery in the vehicle, the power generation power limit, and the power generator set is controlled to operate at the target power generation power. The equivalent factor is used to indicate the equivalent relationship between the power consumption and the fuel consumption of the vehicle, and the first power generation power is the power generation power of the power generator set under the condition that the equivalent fuel consumption is minimum. Since the first power generation power is determined based on the equivalent factor, the target power generation power can be accurately controlled, so that the service life of the power battery is prolonged.

The invention relates to a battery power control method and device, a vehicle and a storage medium, and belongs to the technical field of electric vehicle energy management and battery power adjustment. The method comprises the following steps: determining a monitoring SOC and a monitoring temperature of a battery; determining temperature difference information between the monitored temperature and the set temperature; determining the basic charging and discharging power of the battery according to the monitored SOC and the monitored temperature; determining a power adjustment amount according to the monitored SOC, the temperature difference information and the spontaneous heating power of the battery, and correcting the basic charging and discharging power based on the power adjustment amount to obtain a target charging and discharging power smaller than the basic charging and discharging power; and performing power control on the battery based on the target charge-discharge power limit. Therefore, according to the scheme, the spontaneous heating power of the battery is considered when the basic charging and discharging power is corrected, the charging and discharging safety of the battery can be improved, thermal runaway and the over-temperature fault of the battery are avoided, and thus the high-temperature performance of the battery is improved.

The invention relates to a hybrid engine regeneration control method and system. The method comprises the following steps: acquiring an electric device fault level signal, an engine operation parameter and a post-processing device temperature signal; judging whether the post-processing system is in an active regeneration state or not based on the engine operation parameters and the post-processing device temperature signal; when the fault level is a first level or a second level, if the driving system is in an active regeneration state, not issuing a'high-voltage lowering instruction ', performing power limitation on the driving system, maintaining the regeneration state, and issuing the'high-voltage lowering instruction' until regeneration is completed; and when the fault level is the third level or higher level, if the engine is in the active regeneration state and the temperature of the post-processing device is higher than the set limit value, the rotating speed of the motor is controlled to be reduced to the set value, operation is maintained till the temperature of the post-processing device is reduced to be lower than the set limit value, then the engine is controlled to recover to the idle speed state, and a high-voltage lowering instruction is issued. And peak impact of voltage and heat is avoided through cooperative judgment of the fault level and the regeneration state.