1051 results about "Power limits" patented technology

The invention relates to a V2G-based alternating current charging power adjusting method and device. The method comprises the following steps: carrying out multi-scale data acquisition and preprocessing on a V2G alternating current charging system to obtain a standardized system state data set; constructing a system dynamic model comprising a power grid voltage characteristic and a charging power characteristic; carrying out decomposition to obtain a power output mapping relation calculation, and obtaining a power modulation control parameter; establishing a fast and slow time scale coordination control framework, and designing a power regulation agent and a voltage regulation agent to obtain a coordination control strategy; checking a charging power limit value constraint, a voltage limit value constraint and a power factor constraint to obtain a constraint violation judgment result, and executing constraint projection calculation to obtain a target control instruction; and controlling a power conversion circuit of the charging pile to execute power regulation operation. According to the invention, a hierarchical control structure is adopted, the control complexity of the system is reduced, and the robustness and the adaptive ability of the control strategy are improved.

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 power matching-based current limiting method, system and equipment for a network construction type flexible direct current system. Relates to flexible direct current transmission. An existing current limiting method affects system stability and control accuracy. The current limiting condition is equivalently converted into the power limiting condition under the characteristic that the output voltage of the grid-forming converter is stable, the power limiting condition is converted into the angular frequency judgment condition under the characteristic of droop control, and when the angular frequency of the system is smaller than the lower limit of the angular frequency threshold value, it is judged that the system has overcurrent under large disturbance, and then the system is controlled. And the power matching module is connected, the output power of the converter is limited to be the maximum value, and then the current is limited to be the maximum value allowed to be output by the converter. According to the technical scheme, the current limiting effect of the converter can be achieved on the premise of not changing the network construction type frequency modulation control characteristics, complex parameter measurement and setting are not needed, the potential operation scene of the flexible direct current system can be effectively dealt with, and safe and reliable operation of the network construction type flexible direct current system is ensured.

The invention provides a method and system for achieving elevator energy feedback data communication. The method comprises the steps that multi-modal data are collected, and fault features are extracted, encrypted and packaged; and after decryption, phase deviation of elevator operation and power grid voltage is calculated by utilizing an algorithm, a current phase is synchronously fed back, and a feedback instruction is generated. Uploading the harmonic suppression parameter to an energy center, calculating a demand, generating a region-level feedback strategy, dynamically distributing a feedback power upper limit, synchronizing the harmonic suppression parameter, and obtaining region-level feedback data. And aggregating feedback data, and setting a global optimization target, including cost minimization, feedback maximization and carbon emission reduction. And calculating feedback energy and carbon integral according to a target adjustment algorithm, automatically settling to an operator account, and adjusting the target of the next period. Through an algorithm and an optimization mechanism, the problem of energy waste of a brake resistor in a traditional feedback technology is solved, the feedback efficiency is improved, and energy waste is reduced.

An object is to determine available input / output power of a battery with high accuracy. A battery control device includes: a correction factor calculation unit that determines a correction factor based on a deviation between a state of a secondary battery determined from a measured value related to the secondary battery and a state of the secondary battery calculated using a model related to the secondary battery; and a power limit value calculation unit that employs correction based on the correction factor to calculate a value related to available input / output power of the secondary battery. A ratio between voltage change in internal resistance based on an actual measured voltage obtained by measuring voltage of the secondary battery, and a voltage change in internal resistance based on a model voltage determined using a voltage equivalent circuit model of the secondary battery can be determined as the correction factor.

Hierarchical power estimation and throttling in a processor-based system in an integrated circuit (IC) chip, and related power management and power throttling methods are disclosed. The IC chip includes a processor as well as integrated supporting processing devices for the processor. The hierarchical power management system controls power consumption of devices in the IC chip to achieve the desired performance in the processor-based system based on activity power events generated from local activity monitoring of devices in the IC chip. The circuit levels in the hierarchical power management systems are configured to be time synchronized with each other for the synchronized monitoring and reporting of activity samples and activity power events, and the generation of power limiting management responses to throttle power consumption in the IC chip.

Provided are a torque distribution method and apparatus, an electronic device and a storage medium. The method comprises: acquiring the current battery temperature of a high-voltage battery operating in a low-temperature environment and a driver demand torque (S101); determining target charging and discharging power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge capacity of the high-voltage battery (S102); determining, according to the target charging and discharging power and the actual power of a drive motor, generated power required by a range extender system (S103); and determining a target engine speed and a target engine torque of an engine and a target generator speed and a target generator torque of a generator according to the generated power and an optimal efficiency curve of the range extender system (S104). According to the method, the generated power can be adjusted along with the temperature, so that the battery does not need to work near the power limit for a long time, the safety of the high-voltage battery is improved, and the drivability can be improved. Moreover, the torque of the engine can be kept accurate in a low-temperature environment, thereby guaranteeing the accuracy of the charging power.

The invention relates to a sodium electric energy storage system dynamic partition power control method based on string type cluster level management, which comprises the following steps of: firstly, realizing physical isolation of battery clusters through a string type framework, configuring an independent power conversion module and a cluster level controller for each cluster, acquiring voltage, current, SOC (state of charge) and SOH (state of health) of each cluster in real time, and on the basis of the data, in a discharging or discharging process, determining the state of charge of each cluster; a dynamic partition strategy and automatic adjustment of power distribution are realized according to inter-cluster SOC, SOH, voltage range, temperature range, power limit and other differences, and an energy storage system is dynamically divided into a high-energy high-health area, a high-energy medium-health area, a medium-energy high-health area, a medium-energy medium-health area, a low-energy or sub-health area and a fault early warning area in a discharging and charging mode; and rapid balance of electric quantity among clusters is realized through the converter module, so that power distribution is ensured to meet power grid requirements, overcharge and overdischarge of batteries are avoided, and the service life of a battery system is prolonged.

The invention provides a charging pile dynamic power regulation and control system and method based on multi-parameter coupling. Belongs to the field of charging of charging piles, and comprises the steps that when the total power of a bus reaches a load reduction threshold value, a phase cooperative load reduction strategy is activated, a multi-stage response mechanism is configured through a safety control execution unit, peak clipping and valley filling control is implemented in the time periods t1-t2, and a total load curve is smoothed through time shifting power distribution; and when the power is close to the power limit, the power of the non-emergency charging pile is automatically reduced to a safety threshold, and the equipment utilization rate is intelligently improved in a load sufficient period. And the concurrent access number of the charging piles is maximized on the premise that the bearing limit of the phase lines is not exceeded. The user capacity under the rated load of the charging station is improved, the user charging cost in the time-of-use electricity price period is reduced, the utilization rate of electric power resources is improved, millisecond-level power adjustment response is achieved, the full-time-period compliance of dynamic load limitation on the power grid side is ensured, and the operation benefits, safety and reliability of charging infrastructures are remarkably improved.

Methods and systems for managing power consumption in data processing systems are disclosed. The power consumption in the data processing systems may be managed by obtaining power limits for the data processing systems. The power limits may be determined by computing the power limits from regularly updated parameters of the data processing systems. The data processing systems may include data processing systems that are housed in racks. From the regularly updated parameters, rack power limits may be obtained. Using the regular parameters and the rack power limits, data processing system power limits may be obtained for the data processing systems.

The invention provides a real-time power distribution method of an electric vehicle charging station and a terminal. The current maximum allowable power of the charging station is calculated in real time; acquiring the required current and the vehicle side voltage of the charged vehicles, and calculating the required power of each charged vehicle and the total required power of all the charged vehicles; calculating the power limit of each charging vehicle based on the maximum allowable power, the demand power and the total demand power, and taking the power limit as the power upper limit of the charging pile for charging the corresponding vehicle; the current SOC, the total battery electric quantity and the charging starting time of the charged vehicles are obtained in real time, and the charging ending time of each charged vehicle is calculated in combination with the current charging power of the corresponding charging pile; and grouping the charged vehicles according to the sequence of the charging ending time, and increasing or decreasing the power quota of the corresponding proportion to the current charging power of the charging pile corresponding to each charged vehicle in each group. According to the invention, the circulation speed of vehicles in the charging station can be improved while the output power does not exceed the maximum allowable power of the charging station.

A method for performing mapping between one or more radio modules and one or more radiofrequency (RF) groups includes: separating the one or more radio modules into the one or more RF groups according to one or more messages, wherein the one or more messages comprise a previous TX power ratio, a TX power ratio margin, one or more weighting information, one or more TX performance indices, one or more receiving (RX) performance indices, one or more configurations, or one or more usage scenarios; accumulating RF exposure of the one or more radio modules to at least one RF group among the one or more RF groups; and determining at least one transmitting (TX) power limit corresponding to the at least one RF group according to accumulated RF exposure of the at least one RF group.

The invention discloses a power grid frequency regulation and control method for a low-inertia power system, and the method comprises the steps: taking the minimum lowest point of the power grid frequency in fluctuation as a first regulation and control target based on frequency response models constructed by frequency modulation resources in the low-inertia power system, taking the lowest total frequency modulation cost of the frequency modulation resources as a second regulation and control target, taking the condition that the lowest point of the fluctuating power grid frequency meets the security constraint as a first constraint condition, and taking the condition that the generated power output by each frequency modulation resource meets the power limit as a second constraint condition; taking a third constraint condition that the total amount of the generated power output by each frequency modulation resource meets the total power requirement of the low-inertia power system, solving to eliminate the frequency deviation and the generated power output by each frequency modulation resource, and the frequency modulation resources comprise a synchronous generator set, a network construction type virtual inertia device and a network following type virtual inertia device. Collaborative optimization of various frequency modulation resources can be realized, and complex dynamic power system requirements can be met.

The invention provides a request power control method, electronic equipment and a vehicle, which can determine the limit of battery performance through the available power of a battery in different current running states to obtain the available power of a motor. And the available power of the motors is distributed in different driving modes, so that the available distribution power of each motor can be determined. And performing power reservation on the available distribution power through the corresponding target reserved power so as to avoid the overvoltage or undervoltage risk of the battery. The limit of the motor performance is determined through the maximum allowable power of the motor, then the actual maximum power is determined according to the maximum available power and the maximum allowable power, and the actual maximum power is the value of the maximum allowable request power under the motor performance limit and the battery performance limit. And the request power converted by the request torque can be ensured to reduce the damage to the battery and the motor according to the actual maximum power limit request power.

Systems and methods for improving operation of an automotive battery system including an automotive electrical system comprising a battery system that uses operational parameters, predicted internal resistance of a battery expected over a prediction horizon, and real-time internal resistance of a battery to increase performance and reliability. The battery system includes a battery electrically coupled to electrical devices in the automotive system, sensors coupled to the battery that determine terminal voltage of battery, and a battery control system communicatively coupled to sensors. The battery control system determines a charging power limit used to control supply of electrical power to the battery when charging the battery, based on predicted internal resistance when measured terminal voltage of the battery is not greater than a lower voltage threshold and based on a real-time internal resistance of the battery when the measured terminal voltage of the battery is greater than the lower voltage threshold.

A microgrid system includes an electrical bus including at least one electrical load; at least one non-energy storage system asset configured to supply electrical power to the electrical bus; an energy storage system group including: two or more energy storage system assets configured to supply electrical power to the electrical bus, and a system controller operatively coupled to each of the assets on the electrical bus. The system controller is configured to: determine characteristic energy set points and power limits for each of the assets; determine that at least two or more assets have a same priority for power distribution; determine the characteristic power set points for the non-energy storage assets, dispatch the energy storage system assets having the same priority by treating a dispatch for the energy storage system assets as a combined asset.

The embodiments include a power converter including a DC / AC conversion unit. A direct current bus is connected to the DC / AC conversion unit and a direct current source. The DC / AC conversion unit is further connected to a power grid. When a direct current bus voltage is less than or equal to a first voltage threshold, the power converter may switch to a current source mode to output first output power to the power grid, where the first output power is equal to an output power limit of the direct current source. Then, if a fluctuation amplitude of the direct current bus voltage is less than or equal to a first fluctuation threshold, the power converter may resume outputting second output power to the power grid in a voltage source mode, so that the second output power is less than or equal to the output power limit of the direct current source.

The invention discloses a bidirectional intelligent cooperative operation method for a dynamic reconfigurable battery system and an interconnected energy storage converter, and aims at a coupling system for the operation of the dynamic reconfigurable battery system and the energy storage converter to refine the working state of the coupling system. The method is divided into six working conditions: 'two-way optimal ', 'module optimal', 'module optimal ', power limit entering', 'power optimal ', 'power optimal', module limit entering 'and'two-way limit entering'. Compared with a traditional control method in which the dynamic reconfigurable battery system and the energy storage converter are treated as two independent operating individuals, the method has the advantages that the working state of the dynamic reconfigurable battery system is considered, and the output power range of the dynamic reconfigurable battery system is calculated according to the topological structure of the dynamic reconfigurable battery system; meanwhile, the actual power requirement of the energy storage converter is considered, and corresponding dynamic reconfigurable battery system reconfiguration strategies and coupling system operation strategies are provided according to different working states. The dynamic reconfigurable battery system and the energy storage converter realize interactive regulation and coordinated operation, and the two parts of the coupling system are regarded as a whole.

Hierarchical power estimation and throttling in a processor-based system in an integrated circuit (IC) chip, and related power management and power throttling methods are disclosed. The IC chip includes a processor as well as integrated supporting processing devices for the processor. The hierarchical power management system controls power consumption of devices in the IC chip to achieve the desired performance in the processor-based system based on activity power events generated from local activity monitoring of devices in the IC chip. The circuit levels in the hierarchical power management systems are configured to be time synchronized with each other for the synchronized monitoring and reporting of activity samples and activity power events, and the generation of power limiting management responses to throttle power consumption in the IC chip.

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 control method of a hybrid power system, the hybrid power system and a hybrid excavator. The control method of the hybrid power system comprises the steps that the required power of a hydraulic system, the required power of an electrically-driven rotation system and the current electric quantity of an energy storage module are obtained; the total demand power of the system is calculated according to the demand power of the hydraulic system and the demand power of the electric drive rotation system; determining the working mode of the hybrid power system according to the size relation between the total demand power and a first preset value and the size relation between the current electric quantity of the energy storage module and an electric quantity limit value; when the hybrid power system is in the heavy load mode, the generator motor is controlled to provide power for the hydraulic system; and when the hybrid power system is in the light load mode, the generator motor is controlled to convert part of kinetic energy generated by the engine into electric energy to charge the energy storage module. The system reliability can be enhanced, energy consumption and emission are reduced, and efficient utilization of energy is achieved.

Broadcasting power limiting management responses in a processor-based system in an integrated circuit (IC) chip is disclosed herein. In one aspect, an IC chip comprises a processor-based system that includes a power estimation and limiting (PEL) circuit, a Limit Management Throughput Throttle (LMTT) source circuit, a plurality of activity management (AM) circuits, and an LMTT bus communicatively coupling the LMTT source circuit with each AM circuit of the plurality of AM circuits. The LMTT source circuit receives a power limiting management response from a PEL circuit via a communications network of the processor-based system, and generates an LMTT command based on the power limiting management response. The LMTT source circuit broadcasts the LMTT command to each AM circuit of the plurality of AM circuits via the LMTT bus.

The embodiment of the invention relates to a vehicle thermal management control method and device, electronic equipment and a storage medium. The method comprises the steps that at least one current working mode of a target vehicle is determined; determining a target working mode meeting a preset thermal management high-power working starting condition from the at least one working mode; determining a thermal management power limit value corresponding to the target working mode; a signal is generated that permits operation of a high-power drive device included in the thermal management system, and the operating power of the thermal management system is limited not to exceed a thermal management power limit. According to the embodiment of the invention, the control strategy of the thermal management system is combined with the working mode of the vehicle, so that the thermal management system can carry out adaptive control according to different working modes, the problems of insufficient thermal management power, insufficient vehicle power and the like can be avoided, and the energy utilization efficiency and scene adaptability of thermal management operation are improved.

The invention discloses a beam joint optimization method based on an RIS auxiliary cellular removal mMIMO system, and based on the characteristic that an active RIS has a signal amplification characteristic, an active RIS auxiliary downlink cellular removal mMIMO system is used to enhance the signal strength. On the basis of a data expression received by a downlink user, a downlink rate expression of the active RIS-assisted cellular removal mMIMO system is given; and then, considering that the access point and the active RIS have the maximum power limit, designing an alternate solution algorithm, including using a quadratic transformation technology and a dual gradient method, solving the problem of downlink and rate maximization optimization, and jointly optimizing a downlink access point beam forming sequence and an active RIS reflection beam. According to the method, the influence of multiplicative fading on an RIS auxiliary channel is reduced, the problems of inter-user interference and noise interference amplification caused by using an active RIS are effectively solved, and the system performance is improved.

A method for improving transmission power management with compliance to regulations of radiofrequency exposure, which may comprise: at a current time, estimating whether a window average power, which may reflect average power transmitted using a radio technology during a moving time window, will exceed a power limit after the current time; if true, proceeding to at least one of a first handling subroutine and a second handling subroutine to set a power cap, and causing power transmitted to be capped by the power cap after the current time. The first handling subroutine may comprise: scheduling to set the power cap lower at a scheduled time. Estimating whether the window average power will exceed the power limit may involve discarding one of a plurality of power records. The second handling subroutine may comprise: setting the power cap not higher than the discarded one of the plurality of power records.

The invention discloses an event-triggered micro-grid distributed economic dispatching method considering a main power grid, and belongs to the field of energy-saving and environment-friendly economic dispatching of intelligent power grids. According to the method, the situation that whether the micro-grid is connected into the main power grid or not is fully considered, the more general incremental cost model is established, the finite time consistency economic dispatching algorithm triggered by the distributed event is designed, and the incremental cost of the generator is finally consistent under the condition that the topological structure is kept switched through the algorithm. Meanwhile, an auxiliary variable is introduced, the auxiliary variable is updated by applying a finite time consistency economic dispatching algorithm, and then the increment cost is updated by applying the auxiliary variable, so that the optimal increment cost and the output power of the generator can be obtained under the power limitation of the generator. In addition, when the micro-grid is connected into the main grid, the algorithm can enable the micro-grid to output power required by the main grid. According to the invention, economic dispatching can be carried out on the micro-grid under the condition of switching the topological structure within finite time, and meanwhile, power required by a main power grid can be output by being connected into the main power grid.

The invention discloses a new energy utilization rate evaluation method based on an electric power spot market, and belongs to the technical field of new energy station power generation. Related information published by a transaction center is acquired, and then the loss rate is calculated from two perspectives of published power and published price according to actually and specifically acquired data information; therefore, the overall utilization rate of the new energy is further calculated, the disadvantage that the traditional evaluation of the power limiting rate or utilization rate is disjointed with the power transaction is avoided, the objectivity and practicability of the evaluation are improved, and the misjudgment risk is reduced by integrating the information of the two perspectives. And finally, calculating the year-on-year ratio and the ring-on-ring ratio of each loss rate to the overall utilization rate of the new energy, and reasonably evaluating the future income of the new energy station within a certain time duration.

The present application discloses a photovoltaic power station inefficiency mode recognition method, device, equipment and medium, which relates to the photovoltaic power station detection technology field, including: preliminarily judging whether the photovoltaic power station is a preliminary inefficient power station according to a first inefficiency judgment value obtained based on the daily equivalent power generation hours and the daily equivalent power generation hours standard value and a second inefficiency judgment value obtained based on the current daily power generation rate and the standard power generation rate; if it is a preliminary inefficient power station, judging whether the consecutive days for which the photovoltaic power station is determined as a preliminary inefficient power station exceeds a preset number of days, if it exceeds, the preliminary inefficient power station is an inefficient power station; evaluating the inefficient mode loss rate of the inefficient power station through an inefficient mode evaluation model so as to determine the reason why the inefficient power station is in the inefficient mode based on the inefficient mode loss rate; the inefficient mode loss rate includes the component tilt angle loss rate, the component spacing loss rate, the component pollution loss rate, the equipment failure loss rate and the power restriction loss rate. It can accurately determine the inefficient power station and determine the inefficiency cause and inefficiency degree of the inefficient power station.

An operation and maintenance adjustment method based on the light abandoning amount of a photovoltaic power station comprises the following steps: obtaining historical operation and maintenance data of the photovoltaic power station, and determining the power limiting time type of the photovoltaic power station; obtaining power data of the photovoltaic power station, wherein the power data comprises an AGC value, inverter actual time sequence power, inverter theoretical time sequence power, inverter historical actual time sequence power and inverter historical theoretical time sequence power; inputting the power data into a prediction model, and obtaining a light abandoning amount through the prediction model; and adjusting the equipment of the photovoltaic power station according to the light abandoning amount and the power limiting time type. Through the analysis of the light abandoning amount and the power limitation, the method plays an important role in the aspects of power supply and demand balance, energy planning, energy conservation and emission reduction, emergency response, evaluation effect and the like, and facilitates the realization of sustainable energy development and power supply stability in the photovoltaic power station.

The invention provides a photovoltaic power generation grid-connected limited power control method and device and computer equipment, and belongs to the technical field of new energy grid-connected power control. The method comprises the following steps: acquiring a power prediction value required by a load at a next moment and a maximum output power prediction value of a photovoltaic power station; judging whether the predicted value of the maximum output power of the photovoltaic power station at the next moment is greater than the sum of the power loss value generated during photovoltaic power generation grid connection and the predicted value of the power required by the load at the next moment; if yes, the constructed MPC module is used for generating the optimal duty ratio, so that the power output by the DC / DC converter in photovoltaic power generation under the control of the pulse modulation signal with the optimal duty ratio tracks the target power value, and otherwise, MPPT maximum power point tracking control is adopted on the DC / DC converter side. By means of the method, flexible power control during photovoltaic power generation grid connection is achieved, and the method has the advantages of being high in response speed, high in real-time performance, high in adaptability to variable loads and the like.