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380 results about "Current cycle" patented technology

Response control method for charging station participating in low-voltage treatment scene

The invention discloses a response control method for a charging station participating in a low-voltage treatment scene, and the method comprises the following steps: S1, collecting the voltage data of a charging pile, calculating a deviation, and judging a low-voltage grade; s2, when the deviation is in a light interval, outputting reactive power support voltage in proportion; s3, when the deviation exceeds a heavy threshold value, reducing active power and starting V2G feedback; s4, constructing a graph structure model, and extracting inter-node power coupling and user behavior factors; s5, inputting the model into an improved prediction controller, predicting a future voltage state, and optimizing and outputting a current period power control value; s6, power adjustment is executed, and feedback power is slowly output in the V2G stage; and S7, comparing the control deviation with the behavior factor change, updating the node control priority, and feeding back for rolling optimization of the next period. According to the invention, while the charging regulation and control precision is improved, the user experience and the voltage stability are effectively considered, and the method is suitable for various low-voltage treatment scenes.
Owner:HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST

Self-adaptive adjustment method and system for die-casting temperature of die-casting die

The invention discloses a self-adaptive adjustment method and system for the die-casting temperature of a die-casting die, and relates to the field of die-casting temperature adjustment, and the method comprises the steps: synchronously obtaining a real-time temperature data flow and a real-time control output flow of the die-casting die, and constructing a time sequence data model capable of representing the internal thermal dynamic characteristics of the die-casting die; on the basis, a depth time sequence prediction model is introduced, and the future temperature response track of the system is accurately deduced. Furthermore, process targets such as a temperature set value are fused, and a model predictive control framework is utilized to carry out prospective rolling optimization on future multi-step control output so as to solve an optimal control instruction sequence. And finally, taking the first instruction of the sequence as the actual control output of the current period. Therefore, the advanced and accurate output of the controlled quantity can be realized, and the thermal hysteresis effect is effectively overcome, so that the high-precision and high-stability self-adaptive adjustment of the die-casting temperature is realized.
Owner:WUHAN YOSHIOKA PRECISION TECH CO LTD

Position-free sensing method for joint module based on rotating speed estimation and virtual Z correction

The invention discloses a position-free sensing method for a joint module based on rotating speed estimation and virtual Z correction. The method comprises the following steps: firstly, acquiring three-phase current of a permanent magnet motor for a joint module, and acquiring d-axis estimated current of a current period based on a d-axis current model in combination with a state quantity of the permanent magnet motor in a previous control period; based on the d-axis estimated current, constructing a rotating speed estimator taking the d-axis estimated current error as a sliding mode surface to obtain the estimated rotating speed of the motor rotor; integrating the estimated rotating speed, and combining with the initial position of the rotor to obtain the estimated position of the motor rotor in the current period; at the same time, at the zero crossing point of the stator phase current, the estimation position is forcibly corrected to a predetermined electrical angle corresponding to the zero crossing point so as to eliminate the integral error. The invention aims to directly estimate the rotating speed without depending on any intermediate signal, and simulate the correction mechanism of a mechanical sensor to eliminate the estimation error, thereby realizing high-performance noise-free full-speed-domain position-free sensing control.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method for calculating matrix multiplication, artificial intelligence chip, calculation device, medium and program product

The invention relates to a method for calculating matrix multiplication, an artificial intelligence chip, a calculation device, a medium and a program product. The method comprises the following steps of: accumulating a calculation result of a current cycle calculation and a calculation result of a previous cycle calculation of matrix multiplication executed in a thread bundle group granularity by utilizing a buffer which is configured in a calculation core and is used for accumulation operation; determining whether the last cycle calculation of the matrix multiplication performed at the thread bundle group granularity is completed; and in response to determining that the last cycle computation of the matrix multiplication performed at the thread bundle group granularity is completed, writing the computation results accumulated via the buffer to the register file. According to the invention, the write bandwidth of the register and the occupation of the register space can be obviously reduced.
Owner:SHANGHAI BIREN TECH CO LTD

Air conditioner control method and system based on carrierless communication and storage medium

The application provides an air conditioner control method and system based on carrierless communication, and a storage medium. The method comprises the following steps: after the air conditioner is powered on, when it is detected that the intelligent control running time reaches two cycles, the user usage habit self-learning is entered, so as to intelligently control the air conditioner based on the self-learning result; whether the intelligent control running time reaches one cycle is detected in real time, if yes, the parameter correction is performed according to the user usage habit of the previous cycle, so as to obtain a new user usage habit, and intelligently control the air conditioner based on the new user usage habit; otherwise, the air conditioner is intelligently controlled based on the user usage habit of the current cycle; whether the current user usage habit meets the preset requirement is judged every preset cycle, so as to correct the control parameter corresponding to the user usage habit according to the judgment result. The application can continuously update the parameter according to the change of the user usage habit, and is more intelligent.
Owner:GUANGDONG ABOS TECHNOLOGY CO LTD

Electric energy quality compensation method and equipment for new energy access power grid

The invention relates to the technical field of transformer intelligent optimization compensation, in particular to an electric energy quality compensation method and equipment for new energy access to a power grid, and the method comprises the steps: connecting a dynamic voltage compensation converter in series at the low-voltage side of a transformer, and connecting a high-power bidirectional converter in parallel at the load side of a terminal, acquiring the voltage of the low-voltage side of the transformer at each moment in each period, and recording the voltage as transformer voltage; acquiring load current and load voltage at each moment in each period of the load side of the terminal; determining the influence weight of harmonic disturbance, the influence weight of reactive power disturbance and the influence weight of voltage out-of-limit in each period; constructing a target function; and obtaining an optimal power factor, each harmonic current component and each transformer voltage in the current period by utilizing an intelligent optimization algorithm and combining the objective function, and respectively performing transformer voltage compensation, reactive compensation and harmonic current compensation on the current period. Therefore, the overall stability of electric energy quality is improved.
Owner:LUOYANG XINGHUO SPECIAL TRANSFORMER CO LTD

Communication method and system of power electronic equipment, electronic equipment and storage medium

The invention provides a communication method and system of power electronic equipment, electronic equipment and a storage medium. The method comprises the following steps: a master controller sends a data frame of a current period to a recently connectable slave controller; the slave controller receives a data frame sent by the master controller or a previous connectable slave controller in the current period, writes a current state parameter of the corresponding power electronic equipment into the data frame, and sends the written data frame to a next connectable slave controller or the master controller; when any slave controller detects that a fault occurs, the fault slave controller sends a fault frame to the master controller; the master controller responds to the fault frame and sends an isolation instruction to a target slave controller according to the fault frame; the target slave controller responds to the isolation instruction, communication between the target slave controller and the fault slave controller is isolated based on the standby network cable, and the fault slave controller is determined to be a slave controller which cannot be communicated. According to the invention, the real-time performance and stability of an electronic power equipment communication system can be improved.
Owner:NANJING HEXI ELECTRIC CO LTD

Failure oscillation interval determination method, temperature control method and related equipment

The invention provides a failure oscillation interval determination method, a temperature control method and related equipment, and the method comprises the steps: setting the width of a failure oscillation interval as the ith width at an ith test stage, obtaining the current chip temperature of a processor according to a preset period interval, and executing an error integral temperature control strategy to obtain a current frequency point corresponding to the current chip temperature, taking the current frequency point as an operation frequency point of the processor in the current period; monitoring whether the current chip temperature exceeds the target temperature or not in the ith test stage; if not, determining the target width of the failure oscillation interval according to the ith width, and further determining the lower limit of the failure oscillation interval. By formulating the failure oscillation interval when the error integral temperature control strategy is executed, when the chip temperature is in the failure oscillation interval, the updating of the integral error is stopped, so that the adjustment amplitude of the temperature is changed, the chip temperature is prevented from oscillating up and down near the target temperature, or the oscillation amplitude is reduced.
Owner:CIX TECH (SHANGHAI) CO LTD

Transaction data processing method and device, electronic equipment and storage medium

The invention provides a transaction data processing method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring the market information of an electric power spot market in a current period, declaration strategies of a plurality of users and execution return in a previous period; performing priority ranking on the users based on the strategy and the market information to obtain a ranked user sequence; obtaining a target order of the user based on a standard price determined by the market information and the strategy, a price change step length and a transaction electric quantity in the strategy and the user sequence; carrying out comparison processing on the target order and the hung order executing the return to obtain a comparison result; and generating an order execution operation in the current period based on the comparison result, the target order and the hung order. According to the method, aggregation and account-level concurrency control in a period can be realized, so that stable throughput and low jitter can be kept under multiple parallel users, and high concurrency stability in a transaction data processing process is improved.
Owner:SHANGHAI LUXINGGUANG INTELLIGENT TECHNOLOGY CO LTD

Intelligent measuring switch with electric energy error monitoring function

The invention relates to the technical field of electric energy error monitoring, in particular to an intelligent measuring switch with an electric energy error monitoring function. The switch comprises a data acquisition unit which is used for acquiring a voltage sequence in a current period and theoretical voltage at each moment; the reference weight acquisition unit is used for acquiring the abnormal degree and the reference weight of each real-time voltage; the stability coefficient obtaining module is used for determining an initial window and obtaining a stability coefficient corresponding to the window based on the real-time voltage in the window; the window sliding module is used for starting to slide in the voltage sequence by utilizing the initial window, updating the window before each time of sliding based on the stability coefficient, and acquiring real-time voltage in the window when each time of updating is not slid; and the error monitoring module is used for acquiring the real voltage at each moment by using the real-time voltage in the window when the updating window does not slide, the reference weight of the real-time voltage and the constructed sensor error model. The accuracy of electric energy error monitoring can be improved.
Owner:SHANDONG DEYUAN POWER TECHNOLOGY CORP LTD

Speed stabilization control method and system for hybrid power range extender

The invention relates to the technical field of motor control, in particular to a speed stabilization control method and system for a hybrid power range extender, and the method comprises the steps: obtaining the operation disturbance of an HEV, training an echo state network to learn a time sequence dynamic state, enabling the disturbance to be engine crankshaft torque fluctuation, sampling into a historical sequence according to a control period, and enabling the network to comprise an input layer, a reservoir layer and an output layer; the reservoir is provided with a nonlinear recursive unit of leakage integral, and multi-step prediction is output; the relative angular displacement and relative angular velocity of an engine crankshaft and a planet carrier, the angular velocity of a second motor and the current engine torque are obtained at the control moment; driving the network multi-step look-ahead by using the current disturbance and the historical sequence, covering a control and prediction time domain, and forming a time margin not less than calculation and execution lagging; discrete state space prediction control is constructed based on the disturbance sequence, input and output constraints are applied, and a current state is used as an initial value for extrapolation; an optimal motor torque sequence meeting constraints is obtained through real-time iterative quadratic programming in the current period, and feed-forward compensation and smooth compromise are achieved; and caching the next period segment and issuing the next period segment to an execution mechanism on time. According to the invention, the problem that the HEV power system is easy to cause insufficient compensation or overcompensation during compensation can be solved.
Owner:SHENZHEN XISITE NEW ENERGY TECH CO LTD

COT-based constant power control method, apparatus and device, and storage medium

The invention relates to the technical field of output control, in particular to a constant power control method, device and equipment based on COT and a storage medium, according to the method, fixed turn-on time is combined with dynamic turn-off time adjustment, the conciseness of COT control is reserved, accurate control over output power is achieved, and the control efficiency is improved. The influence of interference factors such as battery voltage drop and load abrupt change on constant power output can be effectively counteracted; specifically, a multi-path output synchronous opening design is adopted, and unified turn-off time adjustment logic is combined, namely, the turn-off time of a (k + 1) th period is calculated according to the total duration of a target period, so that an asynchronous turn-off condition caused by parameter differences of all channels is avoided, and the voltage rise deviation generated by load changes of a later turn-off channel is reduced; real-time output voltage and load resistance are respectively sampled in one period, battery voltage fluctuation and load change are monitored in real time, and error accumulation caused by the fact that a measured value in the current period is extended to the next period to be adjusted is avoided.
Owner:HANGZHOU TOLL MICROELECTRONIC CO LTD

Fixed-frequency inductance-free current sensor four-switch buck-boost soft switching control method

The invention provides a fixed-frequency inductive-current-sensor-free four-switch buck-boost soft switching control method, which comprises the following steps of: generating a regulating variable based on a deviation between an output voltage and a reference value, and determining a time sequence parameter of each stage of the period; charging and discharging in opposite directions are carried out on output junction capacitors of two switch elements of the same bridge arm by utilizing inductive current in a commutation dead zone; when it is detected that the duration of the free circulation stage of the current period does not exceed a preset lower limit, adjusting the time sequence of at least one stage to execute power expansion under a fixed switching frequency, and meanwhile, keeping on under a zero voltage condition; identifying a bias component of the inductive current based on indirect characterization of the output current to the inductive current, and performing correction by adjusting a timing sequence of at least one stage; and combining the outputs of the time sequence generation, the power expansion and the offset correction obtained in the previous steps into a time sequence parameter of the current period. According to the method, the microgrid conversion requirements of a wide voltage adaptation scene on high efficiency, high power density and high robustness are effectively met.
Owner:WUHAN UNIV OF TECH

Intelligent diagnosis method and system for running state of electric energy meter

The invention discloses an electric energy meter operation state intelligent diagnosis method and system, and relates to the technical field of electric energy metering abnormity identification, and the method comprises the steps: deploying an edge diagnosis unit at a low-voltage power distribution terminal, connecting the edge diagnosis unit with an electric energy meter, collecting the operation data of the electric energy meter in real time, defining an operation stability reference window, and constructing a dynamic abnormity triggering mechanism; when a dynamic abnormity triggering condition in the dynamic abnormity triggering mechanism is met, electric energy meter operation data in a current period are collected, and multi-dimensional state sensing factors including a metering consistency factor, an electric energy response aging factor, a communication stability factor and an equipment behavior deviation factor are constructed; and constructing an integrated recognition and classification model based on the multi-dimensional state sensing factors to perform abnormal mode classification, and constructing a multi-level response mechanism according to an abnormal mode classification result. According to the method, real-time identification and classified response of the abnormal state of the electric energy meter are realized, and the accuracy of fault detection and the response closed loop efficiency are improved.
Owner:ZAOZHUANG POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER

User side electricity utilization carbon emission responsibility accounting method based on power grid supply-demand relationship

The invention relates to a user side electricity utilization carbon emission responsibility accounting method based on a power grid supply-demand relationship. The method comprises the following steps: acquiring power supply power information and an operation state corresponding to each energy type of a power supply side and user electricity consumption information of a user side in a current period; based on the operation state corresponding to each energy type, determining an initial carbon emission responsibility transfer index corresponding to each energy type; determining a user side carbon responsibility factor corresponding to the current period based on the initial carbon emission responsibility transfer index and the power supply power information; the user side carbon responsibility factor represents the carbon emission responsibility which should be undertaken when the power grid user side uses one kilowatt-hour electricity in the current period; and determining user side carbon emission responsibility data according to the user side carbon responsibility factor and the user electricity consumption information. The method can improve the rationality of the power consumer side carbon responsibility accounting, and promotes the power consumer to participate in the real-time adjustment of the supply and demand balance of the power system.
Owner:TSINGHUA UNIVERSITY

A timing control method and device, electronic equipment and storage medium

The application provides a timing control method and device, electronic equipment and storage medium. The method comprises: obtaining an actual task execution duration of a time level task in a current period during execution of the time level task according to a task execution frequency corresponding to each time level; the task execution frequency corresponding to each time level is dynamically adjusted according to a system running state; if a value corresponding to the actual task execution duration is greater than a value corresponding to the task execution frequency, adjusting a sleep duration of a future period according to a value relationship between the actual task execution duration and the task execution frequency; and executing the time level task based on the adjusted sleep duration of the future period. The application can effectively reduce the controller load and improve the control accuracy and stability by dynamically adjusting the task execution frequency of each time level and the time compensation mechanism.
Owner:CHINA ELECTRONICS CORP 6TH RES INST

Flexible charging regulation and control system and method for charging pile

The invention relates to the technical field of charging pile charging control, in particular to a flexible charging regulation and control system and method for a charging pile, and the method comprises the steps: obtaining real-time service parameters of the charging pile; calculating a stress accumulation item and a stress dissipation item; the equivalent lithium ion concentration stress of the current period is obtained through updating in combination with the stress accumulation item and the stress dissipation item; calculating a stress suppression item; generating a correction function; generating a dynamic current limit value by combining the stress suppression item, the correction function and a preset reference maximum allowable current; resolving a request current based on the power grid power instruction and the battery terminal voltage; generating a scheduling feasibility index in combination with the request current and the dynamic current limit value; according to the scheduling feasibility index, hierarchical power correction is executed, and actual issuing power is output; according to the invention, the operation safety of the battery is greatly improved, and the overall value of battery assets is greatly prolonged.
Owner:BAOWEI TECHNOLOGY CO LTD

Method and device for adjusting message sending rate, network equipment and chip

The invention provides a method and device for adjusting a message sending rate, network equipment and a chip, and the method comprises the steps that a communication device determines first network information of a current period, and then sends a first feedback message to a first server side; wherein the first network information is used for indicating the proportion of a message of which the waiting time delay is greater than or equal to a time delay threshold in a message of a first application sent by the communication device in the current period, and the message of the first application sent by the communication device in the current period comprises a message of a first client of which the host end is the first application; the message of which the host end is the first client is from a first server of the first application; the first feedback message comprises first network information, and the first network information is used for the first server to adjust the sending rate of the message with the host end as the first client. Based on the scheme provided by the invention, the network congestion can be effectively controlled, and the low-delay experience of the application is ensured.
Owner:HUAWEI TECH CO LTD

Method for address comparison checking of a packed launch queue, scalar processor, device

PendingCN122285080AScalar processorParallel computing
This application provides an address comparison and checking method, scalar processor, and device for a compressed issue queue. The method acquires a first instruction and a second instruction from the compressed issue queue; and obtains an address comparison and checking result based on the address correlation between the first instruction and each second instruction. Furthermore, a comparison and checking result vector is formed, and this vector is updated in advance based on the instruction status in the compressed issue queue in the next cycle. This method, by obtaining the address comparison and checking result based on the address correlation between the first instruction and each second instruction, can flexibly support diverse memory access granularities with a small hardware area overhead while ensuring processor performance (timing). Additionally, by calculating the next state of the comparison and checking result in advance based on the enqueue / dequeue status of the issue queue determined in the current cycle, and updating it directly in the next cycle, it ensures a one-to-one correspondence between the address comparison and checking result and the new instruction position in the issue queue, while also optimizing timing.
Owner:SHANGHAI SMARTLOGIC TECHNOLOGY LTD

Traffic signal machine triggered countdown control output method

The application discloses a traffic signal lamp trigger type countdown control output method, comprising the following steps: S100, configuring signal lamp fixed time countdown time length and configuring current cycle phase information; S200, reading the cycle phase information of the traffic signal lamp at the current time node and the signal lamp fixed time countdown time length, and generating a running phase chain table; S300, judging whether the time before the non-traffic light color of the current lost traffic right phase meets the configured fixed time countdown time length; S400, if the configured fixed time countdown time length is met, triggering the corresponding countdown timer; if the configured fixed time countdown time length is not met, performing countdown correction and calculating the countdown extension time; and S500, repeating steps S200-S400. The application can generate a running phase chain table under the condition that traffic intersection parameters are pre-configured, pre-add, real-time update and calculate signal control data to achieve accurate control of the time when the trigger signal triggers the countdown timer, and realize the trigger type pulse control countdown algorithm.
Owner:ANHUI KELI INFORMATION IND

Energy consumption resistor temperature on-line monitoring method and related device

The invention relates to the technical field of power electronic devices, in particular to an energy consumption resistor temperature online monitoring method and related device.The method comprises the steps that the equivalent heat capacity and the equivalent heat resistance of an energy consumption resistor to be measured are obtained, and the actually measured power of the energy consumption resistor in the current period, the reference temperature of the last period and the preset period time are obtained; according to the equivalent heat capacity, the equivalent heat resistance, the cycle time, the actually measured power, the reference temperature and a preset mapping relational expression of the energy consumption resistor, the temperature of the energy consumption resistor is calculated; the equivalent heat capacity, the equivalent heat resistance and the period time of the energy consumption resistor, the actually measured power of the current period, the reference temperature of the previous period and the mapping relation among the actual temperature of the current period of the energy consumption resistor are embedded in the mapping relation; according to the comparison result of the actual temperature of the current period and the preset temperature threshold value, the monitoring result of the energy consumption resistor in the current period is output, and the technical problem that the temperature of the energy consumption resistor cannot be effectively monitored in the prior art is solved.
Owner:ZHUHAI POWER SUPPLY BUREAU GUANGDONG POWER GIRD CO

A method, system, storage medium and energy storage device for calculating a remaining time

PendingCN122632085AElectrical batterySimulation
The present application relates to the technical field of battery discharge, and particularly relates to a method and system for calculating remaining time, a storage medium and an energy storage device. The method for calculating remaining time comprises the following steps: obtaining a current remaining capacity and a current filtered current of a current period, and obtaining a current reference duration based on the current remaining capacity and the current filtered current; obtaining a historical smooth duration of a previous period, obtaining a jump threshold duration according to the historical smooth duration, and the jump threshold duration is positively correlated with the historical smooth duration; judging whether a difference between the current reference duration and the historical smooth duration exceeds the jump threshold duration; if yes, taking the current reference duration as a current smooth duration of the current period, and displaying the current smooth duration. The present application can achieve the effect of long-term stability and short-term sensitivity, and greatly improve the accuracy of battery remaining time display and user experience.
Owner:SHENZHEN GREEN CONNECTION TECH CO LTD

An energy-saving method and system for stamping processes based on fluctuating load hedging

ActiveCN122100582BCycle controlTimestamp
This application provides an energy-saving method and system for stamping processes based on fluctuating load hedging, relating to the field of cycle control technology. The method includes: real-time acquisition of load signals of each stamping press in each stamping cycle, identifying the peak load mutation point corresponding to the main blanking or drawing process in that cycle, and using the peak load mutation point as the current cycle phase reference point of the stamping press; obtaining the timestamp of the current cycle phase reference point of each stamping press relative to a unified time reference, and calculating the phase difference between any two stamping presses; when the phase difference between two stamping presses is less than a preset safety threshold, selecting at least one of the two stamping presses as the target stamping press; determining a compensation time amount according to a preset compensation rule, and sending a cycle adjustment command to the target stamping press to advance or delay the start time of its next stamping cycle relative to the original start time by the compensation time amount, thereby increasing the phase difference between the two stamping presses.
Owner:TIANJIN SHIYA TOOL&DIE CO LTD

Stochastic frequency pulse modulation for LED control elements

Control element (402) for a light-emitting diode (404), hereinafter referred to as LED, which has the following features: a control signal generator configured to generate a control signal (100) for controlling the LED (404), wherein the control signal (100) has several successive cycles and wherein each cycle (110) has an ON period (112) and an OFF period (114), wherein the control signal (100) in each cycle (110) has an ON value for a length of the ON period (112) of the cycle (110) and has an OFF value for a length of the OFF period (114) of the cycle (110), and a control unit (406) that is designed to: to control the control signal generator, to generate a current cycle (110) of the several successive cycles of the control signal such that the length of the ON period (112) of the current cycle (110) is based on a value of an ON variable (n i) (for the current cycle (110) and that the length of the AUS period (114) of the current cycle (110) is based on a value of an AUS variable (m i ) for the current cycle (110) the value of the EIN variable (n i ) for the current cycle (110) by setting a range of the ON variable (n i ) for the values ​​of the EIN variable (n i ) for the current cycle (110) based on a parameter that takes the values ​​of the EIN variable (n i ) for previous cycles of the multiple successive cycles of the control signal, and by selecting the value of the ON variable (n i ) for the current cycle (110) from the range of EIN variables (n i ) to determine, the value of the AUS variable (m i ) for the current cycle (110) by setting a range of the OFF variable (m i ) for the values ​​of the AUS variables (m i) for the current cycle (110) based on a parameter that defines the values ​​of the AUS variable (m i ) for previous cycles, and by selecting the value of the OFF variable (m i ) for the current cycle (110) from the range of AUS variables (m i ) to determine.
Owner:ANALOG DEVICES INT UNLTD CO

Supercooling valve control method, device and multi-split system

The application provides a supercooling valve control method, device and multi-connected system; the method comprises the following steps: periodically acquiring operation parameters after all outdoor units are operated for a preset length of time; the operation parameters comprise an indoor superheat, an exhaust temperature, an exhaust superheat and a target pipe temperature corresponding supercooling valve opening; determining a control mode of the supercooling valve in the current period according to the exhaust temperature and a preset temperature threshold; in the control mode, determining a target opening corresponding to the current period according to the operation parameters and a preset superheat threshold; and controlling the supercooling valve to operate according to the target opening in the current period. In the control mode, different control modes of the supercooling valve are determined according to the exhaust temperature, and in the control mode, the opening of the supercooling valve is intelligently controlled according to the supercooling valve opening, the exhaust superheat and the indoor superheat, so that the exhaust of the multi-connected system is stable, the output is maximum, and the operation effect of the multi-connected system is improved.
Owner:NINGBO AUX ELECTRIC CO LTD

Self-adaptive power distribution method and system for hybrid energy storage system

The invention belongs to the technical field of electric energy storage and energy management, and relates to a self-adaptive power distribution method and system of a hybrid energy storage system. According to the method, the dynamic efficiency equalization factor is calculated through the dynamic efficiency equalization factor prediction formula; determining an instantaneous power distribution coefficient of a battery and an instantaneous power distribution coefficient of a super capacitor through a real-time power distribution ratio calculation formula based on a dynamic efficiency equalization factor and the total demand power of the system; calculating and issuing a battery current reference instruction and a super-capacitor current reference instruction to corresponding power converters based on the instantaneous power distribution coefficient of the battery, the instantaneous power distribution coefficient of the super-capacitor, the total demand power of the system and the current of the battery in the last period; and performing closed-loop correction on the dynamic efficiency equalization factor based on the actual output power and the actual loss power of the current period to obtain a corrected equalization factor, and generating a dynamic efficiency equalization factor of the next period according to the corrected equalization factor.
Owner:XIAN THERMAL POWER RES INST CO LTD +1

Alkaline electrolytic cell chamber voltage monitoring method, device, equipment and medium

The embodiment of the invention relates to the technical field of water electrolysis hydrogen production, and discloses a method, a device, equipment and a medium for monitoring the voltage of cells of an alkaline electrolytic cell, and the method comprises the following steps: setting a cycle execution period, executing in each period, and obtaining the voltage of a plurality of cells of the electrolytic cell; according to the voltages of the plurality of electrolytic cell small chambers, the voltage variation of each electrolytic cell small chamber between the current period and the previous period is obtained; and the monitoring operation of each electrolytic cell small chamber in the current period is executed according to the voltage variation. The problem that voltage state misjudgment is easily caused during equipment attenuation and working condition dynamic change due to the fact that an existing alkaline electrolytic cell small chamber voltage monitoring method adopts a fixed voltage threshold value alarm can be solved.
Owner:YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD

Multi-carrier-based common-mode voltage suppression method and system

The invention relates to a common-mode voltage suppression method and system based on multiple carriers. The method comprises the following steps: acquiring a first phase duty ratio Ta, a second phase duty ratio Tb and a third phase duty ratio Tc in a current PWM period; comparing and sorting the first phase duty ratio Ta, the second phase duty ratio Tb and the third phase duty ratio Tc to obtain a maximum value Max, an intermediate value Mid and a minimum value Min; a first carrier C1 and a second carrier C2 are generated, the first carrier C1 and the second carrier C2 are carriers with the same amplitude and frequency, and the phase of the second carrier C2 lags behind 180 degrees relative to the first carrier C1; allocating the second carrier C2 to the phase bridge arm corresponding to the intermediate value Mid, and allocating the first carrier C1 to the phase bridge arm corresponding to the maximum value Max and the minimum value Min; and respectively comparing the first phase duty ratio Ta, the second phase duty ratio Tb and the third phase duty ratio Tc with the correspondingly allocated first carrier C1 or second carrier C2 to generate a three-phase PWM driving signal. According to the invention, the hardware cost is prevented from being increased.
Owner:WUXI WEIFU HIGH TECH CO LTD

Battery diagnosis apparatus and battery diagnosis method

According to some embodiments, a battery diagnosis device includes an interface configured to acquire battery data from a diagnosis target battery for each collection interval when a current cycle is initiated and a controller configured to determine whether the battery data passes test items for each collection interval and generate a first count value of the current cycle, accumulate a number of times the determination of the test items fails in the current cycle and generate a second count value of the current cycle, perform a first diagnosis on the diagnosis target battery based on a first accumulated value of the first count value for a first number of cycles, and perform a second diagnosis on the diagnosis target battery based on a second accumulated value of the second count value for a second number of cycles.
Owner:LG ENERGY SOLUTION LTD

Automatic cleaning control method of horizontal centrifuge and centrifuge

The present application relates to the technical field of centrifuge cleaning, in particular to an automatic cleaning control method of a horizontal centrifuge and the centrifuge. The method periodically cleans the horizontal centrifuge, collects turbidity data of heavy phase end and light phase end discharge of each cycle; determines a desorption index according to turbidity difference characteristics between the turbidity data of the heavy phase end and the turbidity data of the light phase end of each cycle; determines a change index according to the change trend of the desorption index; if the change index is not less than a preset speed-up threshold, determines a differential speed adjustment coefficient according to the change index and the desorption index; adjusts the upper limit value of the differential speed based on the differential speed adjustment coefficient, and updates the upper limit value of the differential speed of all subsequent cycles to a target upper limit value of the differential speed; if the desorption indexes of continuous M cycles meet the end cleaning condition, executes the end cleaning strategy in the current cycle; if the desorption indexes of continuous T cycles meet the stop cleaning condition, stops cleaning in the current cycle, thereby intelligently cleaning the centrifuge and improving the cleaning efficiency.
Owner:ZHANGJIAGANG ZHONGNAN CHEM MACHINERY