79 results about "Power limits" patented technology

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.

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.

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.

This invention discloses a method for determining the power state of a battery (B) of an electric vehicle (V). The state of charge (SOC), temperature (T), voltage (V) supplied by the battery, and current (I) supplied by the battery are sensed. A first predicted power limit formula (I) is calculated as a function of the SOC, temperature, supplied voltage, and supplied current. The first predicted power limit is calculated for a first time interval having a duration greater than 1 second and is equal to the voltage (V) of the battery if it is continuously supplied or absorbed by the battery during the first time interval. Cell ) respectively reach the minimum limit value (V) min The power of the battery is calculated as a function of state of charge, temperature, voltage supplied, and current supplied. The second predicted power limit is calculated using formula (II) for the second time interval having a duration of less than 1 second, and is equal to the power that would cause the battery voltage to reach its minimum or maximum limit if continuously supplied or absorbed by the battery during the second time interval. The power (P) instantaneously supplied or absorbed by the battery is sensed. Bat Alternatively, it can be calculated as a function of the supplied voltage and the supplied current. In response to (C2) the power supplied or absorbed by the battery instantaneously being lower than the first predicted power limit, the value of the actual power limit formula (I) is set (41) to the current value of the first predicted power limit formula (I). In response to (C1) the power supplied or absorbed by the battery instantaneously reaching the first predicted power limit, the value of the actual power limit is set (42) to the minimum value selected between: (a) the instantaneous value of the first predicted power limit at the time (t1) when the power supplied or absorbed by the battery instantaneously reaches the first predicted power limit, and (b) the current value of the second predicted power limit.

Methods, systems, and devices are provided for managing operation of data processing systems positioned in a rack. To do so a first identification of a change in a health state of a power supply of a power shelf positioned in the rack may be made, the power shelf supplying power to the data processing systems. Based on the first identification and the change in the health state, a second identification that existing power limits on power consumption by the data processing systems are stale may be made. Based on the second identification, new power limits may be obtained for the data processing systems based on the change in the health state. The new power limits on the data processing systems may be enforced to facilitate continued provisioning of computer implemented services by the data processing systems.

This reduces the risk of overheating caused by the battery not being cooled during external charging. [Solution] The control ECU controls the vehicle. The vehicle is equipped with a battery that can be externally charged and stores power to drive the vehicle, and a compressor that compresses a refrigerant to lower the temperature of the passenger compartment using the rotational force generated by the battery's power. The battery is cooled by the cold of the refrigerant. When the decrease in the rotational speed of the compressor during external charging of the battery meets predetermined conditions, the control ECU controls the compressor to maintain a rotational speed at which the battery is not supplied with charging power exceeding the charging power limit value Win (S114, S116, S117). As a result, even if the rotational speed of the compressor decreases during external charging, the compressor is controlled to maintain a rotational speed at which the battery is not supplied with charging power exceeding the charging power limit value Win. Therefore, it is possible to prevent the battery from being supplied with charging power exceeding the charging power limit value Win.

This invention relates to the field of data management technology, and discloses an Internet of Things (IoT) terminal management method and system. By receiving the total power generated by each IoT terminal in a photovoltaic (PV) power plant, the total output power of the PV power plant is determined. When the active power value generated by the PV power plant or the actual value of the high-voltage busbar of the PV power plant's main transformer is compared with the target value issued by the dispatch center, the active power limit of the inverter is automatically adjusted to bring the current active power or voltage generated by the PV power plant closer to the target value, improving accuracy and control speed, meeting grid demand, enhancing the peak-shaving capability of the IoT system, ensuring that the operation of the new energy power plant and the grid is within a safe and controllable range, and calling upon the planned total output power of the PV power plant, thereby realizing active power control and reactive power control of the PV power plant. It tracks the active power adjustment target value and reactive power adjustment target value issued by the dispatch center, achieving the grid connection technology requirements for high-precision peak-shaving of the PV power plant.

A control device (8) for an inverter (2) for feeding an electric machine (3), wherein the control device (8) is configured to provide a pulse width modulated switching signal (15) with a carrier frequency to drive switching elements (12) of the inverter (2), wherein the control device (8) is configured to determine the carrier frequency depending on operating point information describing an operating point defined by a rotational speed and a torque of the electric machine (3) and to increase the carrier frequency within an operating region (22) as the rotational speed increases and the torque amplitude decreases, the operating region (22) extending within a rotational speed interval having a lower rotational speed limit (23) different from zero and an upper rotational speed limit (24) located within a power limited operating region (21) or a field weakening operating region.

The present invention provides a control device (10) for a secondary battery (110) that can limit the power value of the secondary battery (110) per unit time without excessively limiting the allowable power value of the secondary battery (110). The control device (10) for the secondary battery (110) includes an allowable power setting unit (421) and an allowable power limiting unit (422). The allowable power setting unit (421) sets an allowable power value for the secondary battery (110) during at least one of discharging and charging, based on specified information of the secondary battery (110). The allowable power limiting unit (422) limits the power value before the power value of the secondary battery (110) reaches the allowable power value. The allowable power limiting unit (422) limits the power value in stages at two or more different ratios.

This application discloses an energy efficiency control method, display device, storage medium, and product, relating to the field of energy-saving technology for display devices. The method involves obtaining the proportion of each brightness range in an energy efficiency test source to construct a brightness distribution; determining a total power limit based on the energy efficiency level; and determining the target brightening area and its corresponding fixed power based on a preset basic brightness threshold; determining adjustable power based on the total power limit and fixed power; and allocating the adjustable power to the remaining screen areas except the target brightening area based on the brightness distribution, thereby generating energy efficiency control parameters. By obtaining the brightness distribution, the frequency of occurrence of each brightness range is quantified. The total power limit is determined based on the energy efficiency level, and the fixed power of the target brightening area is locked based on the preset basic brightness threshold, thus decomposing the total power into fixed power and adjustable power. Then, based on the brightness distribution, the adjustable power is allocated to the remaining screen areas, achieving precise coordination between brightness and power, and significantly improving debugging efficiency.

This invention discloses a method and apparatus for generating energy storage scheduling strategies based on a multi-objective optimization algorithm. The method includes: multi-level uncertainty quantification of photovoltaic power, load, electricity price, and battery health status; constructing a distribution-sensitive multi-objective function, including objectives such as revenue, battery life, photovoltaic absorption, and demand control; generating dynamic weight coefficients online through Bayesian optimization based on the uncertainty of variable predictions and battery status; obtaining a set of coupled constraints using a graph neural network based on real-time battery data and health status, including a lower limit for photovoltaic absorption rate and a power limit for health status; solving a baseline charging and discharging plan for a future preset time period using a global scheduling layer; and inputting the dynamic weights and real-time data into a reinforcement learning strategy network at a local scheduling layer to generate and execute minute-level charging and discharging actions under coupled constraints. This invention enables intelligent scheduling and revenue optimization of energy storage systems in complex and highly uncertain environments.

A system for an electrified vehicle (EV) having a battery pack includes a vehicle controller configured to charge and discharge the battery pack according to power limits defined at activation of the EV by an estimated open circuit voltage (OCV). The estimated OCV is based on voltages measured for a duration after a last deactivation of the EV, at least one temperature measured after the last deactivation, and a decay parameter that is a function of the voltages measured and detected using a selected relaxation time and an iterative estimation of a sub-parameter of the decay parameter.

The utility model relates to insulator technical field especially is a wireless energy transmission device of application composite insulator, it includes insulator body, electricity taking connection subassembly and electricity connection subassembly, one end of insulator body is provided with first fitting, the other end of insulator body is provided with second fitting, insulator body is spaced apart with a plurality of coil board along its length direction, and each coil board is encapsulated with coil body, electricity taking connection subassembly includes electricity taking support and the electricity taking cable of installing on electricity taking support, and electricity connection subassembly includes electricity taking support, electricity cable and electric energy storage device. The utility model novel structure, clever design, through along the coil board of the length direction interval arrangement of multiple embedded coils of insulator body, form distributed magnetic resonance coupling path, realize high voltage side to low voltage side's non -contact energy transmission, solve the problem that traditional technology frequently replaces battery, power supply stability is influenced by weather or is power supply power limited.

A power control arrangement (100) for a mining / construction machine comprises: a power bus (110) connectable to a power grid (200), receiving an input power (IP) from the power grid; a first battery (120) and at least one second battery (130) receiving / supplying power from / to the power bus; and at least one load (310) receiving an output power (OP) from the power bus; wherein the power control arrangement adapts a power limit margin of the power grid based on a power supply mode of the power bus, wherein the power supply mode comprises that: 1) only one of the power grid, the first battery, or the second battery supplies power to the power bus; or 2) a combination of at least two of the power grid, the first battery and the second battery supplies power to the power bus.

A node of a radio access network (RAN) can implement a method for facilitating recovery of dual connectivity for a user equipment (UE). The method includes receiving, from the UE, a request to recover radio connectivity with the UE, and determining whether to recover dual connectivity with the UE. The method also includes generating a message instructing the UE to recover radio connectivity with the node, where the generating includes including or excluding, in the message based on the determining, an indication of a maximum power limit for UE uplink transmissions. The method further includes transmitting the message to the UE.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive configuration information indicating a carrier aggregation configuration associated with a first component carrier (CC) and a second CC. The UE can receive, during a transmission occasion associated with at least one of the first CC or the second CC, scheduling information indicating at least one scheduled transmission. The UE can transmit, during the transmission occasion, at least one communication on at least one of the first CC or the second CC using at least one transmission power. The at least one transmission power is based at least in part on a maximum transmission power limit and a power headroom (PHR) reference value determined independent of the maximum transmission power limit. Numerous other aspects are described.

This application relates to methods and apparatus for power limiting for amplifiers. An amplifier is configured to receive an input supply voltage and to draw, in use, an amplifier input current resulting in an amplifier input power. A power limiter is configured to monitor an indication of the amplifier input power, determine a first signal limit based on said indication of the amplifier input power and a pre-set limit and apply regulation to the input signal to provide a regulated input signal for input to the amplifier that does not exceed the first signal limit.

The application provides a wind and light same field power generation coordination control method and device and electronic equipment, relates to the technical field of power system control, and the method comprises the following steps: determining a target wind turbine operating state and a target photovoltaic control strategy based on environment parameters and equipment state parameters; based on the target wind turbine operating state and the target photovoltaic control strategy, a multi-objective optimization model is constructed and solved to obtain target output distribution values corresponding to wind power and photovoltaic, respectively, and control instructions corresponding to a wind turbine controller and a photovoltaic array controller are generated to realize wind and light same field power generation collaborative control, solve the technical problems of low output matching precision and poor adaptability of the existing control method in a power limiting scene, and achieve the technical effects of improving output matching precision and maximizing power limiting benefits.

An embodiment provides an apparatus and method for preventing overcurrent in a grid-forming inverter. An apparatus according to the embodiment includes: a power calculation unit for measuring active power and reactive power for a connection point in real time; a second droop unit for determining a voltage setting value of a grid-forming inverter using the measured reactive power; and a first droop unit for determining a phase angle of the grid-forming inverter so that the measured active power follows a pre-specified active power limit value when the active power limit value is lower than or equal to the measured active power.

The application discloses a kind of new energy static voltage stability evaluation method and system considering reactive support, comprising: determining the reactive power compensation configuration and reactive power demand characteristics of new energy sending terminal system, and based on the reactive power compensation configuration and reactive power demand characteristics, determine the reactive support capability of new energy sending terminal system, clear reactive power compensation device in different operating mode under the available reactive power range;To new energy system side is equivalent to Davy South, the equivalent voltage source and impedance of system side are calculated;Based on the available reactive power range, equivalent voltage source and impedance, construct new energy static voltage stability calculation model, and based on the new energy static voltage stability calculation model calculates new energy static voltage stability power limit.The method of the present application establishes an improved voltage stability evaluation model, combined with voltage stability method, realizes the efficient evaluation of static voltage stability of power grid after new energy access, which can effectively improve the safety and reliability of power system.

The application provides an energy management method and system based on a P1+P3 hybrid architecture and a vehicle, and relates to the technical field of hybrid electric vehicle control. The method comprises: obtaining a battery state of charge and a vehicle operating condition; selecting a preset energy management strategy according to the battery state of charge and the vehicle operating condition, wherein different strategies correspond to different power distribution priorities and calculation logics; obtaining real-time power parameters and capability limits based on the rules of the selected strategy; and dynamically calculating and limiting the power upper limit of a high-voltage load or a power source according to the strategy logic. The application establishes an adaptive strategy selection and dynamic power limit calculation mechanism linked with SOC and operating conditions, solves the problem of rigid energy management of traditional methods when the battery is in an extreme state of charge, realizes fine control of the energy flow of the vehicle, and effectively improves the power performance, energy utilization efficiency and system robustness of the vehicle under the premise of guaranteeing basic functions and safety.

The application discloses a voltage control method and system of new energy station equipment suitable for a weak power grid environment. The method comprises receiving a dispatch signal containing a reactive power set value, collecting real-time terminal voltage and real-time reactive power of the equipment; calculating a first reactive power limit value based on the P-Q characteristic curve of the equipment, dynamically generating a second reactive power limit value using voltage feedback closed loop, and forming a limit constraint condition; using the synthesis and clamping of the differential control signal to generate a reactive current set value of the limited control signal; sending the reactive current set value to the grid-side converter to drive the converter to output reactive power. The application outputs a limit value instead of a direct control signal through a PI controller, constructs a dynamic voltage safety fence, effectively solves the oscillation problem caused by direct voltage closed loop under a weak power grid, realizes decoupling control of fast response to PPC instructions and local voltage safety protection, and improves the online utilization rate of the equipment and the stability of the power grid.

A controller, responsive to receiving a message from a device remote from a vehicle defining a power limit during a rental mode of operation for a power outlet, prevents power output by the power outlet from exceeding the power limit during the rental mode of operation and responsive to the power output reaching the power limit during the rental mode of operation, generates a request for the device to increase the power limit.

The application discloses a diesel generator system and a control method based on grid-connected collaborative control and relates to the field of power system automation.The method comprises the following steps: performing offline test storage of a reference; collecting data to calculate node correction time deviation and link availability indexes; performing integrity, timing and physical consistency judgment on the measurement data, and performing cloud edge link judgment and instruction multidimensional judgment; when an exception occurs, respectively performing instruction buffering, time source switching or data source isolation and maintaining output of the latest valid data; when link judgment fails, switching to an autonomous mode; and when stability meets a threshold and the link is recovered, being limited to active and reactive power limit slope smooth switching back to the collaborative mode.The application ensures data reliability and continuity through physical consistency verification and zero-order holding mechanism, and effectively improves the robustness and smoothness of cloud edge collaborative control.

This invention discloses a multi-mode output control method and system for photovoltaic systems under mismatch conditions, belonging to the field of photovoltaic power generation technology. The method is executed by a photovoltaic converter, using the output voltage of the photovoltaic array as the control quantity, and includes: setting and initializing voltage scanning parameters; determining the initial control mode based on the initial power and power limit command values; achieving maximum power point tracking (MPPT) using a two-step method of large-step coarse scanning followed by small-step fine scanning, while simultaneously detecting power exceeding the limit and switching modes in real time; dynamically adjusting the voltage with a fixed step size based on power feedback in the power limit mode; and achieving smooth mode switching or maintenance based on changes in power and command values ​​after receiving a new power limit command value. This invention solves the problems of traditional MPPT easily getting trapped in local peaks, large power limit control losses, and system oscillations caused by hard mode switching under mismatch conditions, improving the power generation efficiency and grid adaptability of photovoltaic systems, and offering universal parameter design and convenient engineering implementation.