27 results about "Pulse load" patented technology

The invention relates to the technical field of pulse load energy optimization control, in particular to a pulse type ultra-low power consumption energy management system based on a super capacitor, which comprises a pulse spectrum analysis unit, a capacitor bank dynamic tuning unit and a charge state compensation unit, a pulse spectrum analysis unit extracts a load pulse dominant frequency component through a window function weighting algorithm to generate a target frequency value, and a capacitor bank dynamic tuning unit inquires a mapping table according to the target frequency to adjust series-parallel connection combination of the super capacitors and injects a reverse reactance component to offset a resonant impedance difference value. And the charge state compensation unit predicts the residual charge quantity by using a Kalman filter, and triggers a charge redistribution strategy in a non-pulse period, thereby solving the problems of insufficient dynamic impedance matching and low charge balance efficiency in the traditional technology, realizing high-efficiency and low-consumption management of the energy of the super capacitor, improving the energy transmission efficiency, and reducing the energy consumption. And the endurance time of the equipment is prolonged.

The invention provides a control circuit and a control method for a pulse load power supply system, and the control circuit is used for being connected to a power supply main circuit comprising a pulse load, and specifically comprises a phase acquisition module, a signal conversion module, a linear expansion state observer, a voltage control loop, a current control loop, a signal inverse transformation module and a pulse width modulation module. The linear expansion state observer is used for observing load disturbance in real time and generating a load current feed-forward signal, the load current feed-forward signal and an initial current instruction output by the voltage control loop are synthesized in the first summator to form a compensated current instruction, and the compensated current instruction is transmitted to the current control loop; and finally converting into a switching signal for driving a converter in the power supply main circuit. The low-cost, high-performance and high-reliability suppression of the pulse load disturbance is realized.

The present application belongs to the field of automobile electronics, and provides a kind of automobile wire harness fuse wire current carrying capacity matching test method and system, comprising: establishing standardization pulse loading profile, constant current test is extended to cover the composite dynamic test sequence of peak thermal shock and average thermal accumulation;Collect fuse thermal accumulation integral value and wire insulation layer multi-point temperature, introduce three-dimensional evaluation index, identify thermal response asynchronous condition;Pulse peak and duty cycle are gradually increased, respectively, approach the limit of wire transient temperature rise and fuse thermal accumulation melting boundary, determine the safe matching interval by cross comparison;According to the safe matching interval, divide the matching level, select the optimization for asynchronous risk and overheating priority failure combination respectively, and feed back the optimization result to the selection specification.The test distortion problem caused by the asynchronous thermal response of fuse and wire under dynamic pulse current is solved, and the matching reliability and test accuracy of automobile electrical system are improved.

The application belongs to the technical field of terminal power management, and particularly relates to a power supply control method and device for power failure continuation reporting and charging stability of a terminal and a storage medium, wherein the terminal comprises a main / backup power automatic switching circuit, a state indication signal, a communication module and a communication module independent boost power supply circuit; the controller distinguishes the main power / backup power supply state by reading the state indication level of the switching circuit, anti-jitter determination through fixed period sampling and consistent confirmation for multiple times; when the backup power supply is powered, the independent boost power supply circuit is started to maintain the key data continuation reporting of the communication module, and the non-key load is turned off according to the demand; when the main power supply is powered, the independent boost power supply circuit is turned off and the backup power supply loop load is released, and the large pulse load is restored in a timely manner if necessary. The application solves the problems of power supply switching burr misjudgment, switching transient amplification and unstable charging current in the prior art, and realizes the dual protection of power failure continuation reporting and charging stability.

The invention relates to the technical field of motor control, and discloses a motor control method for compressor driving, which comprises the following steps: acquiring a stator current signal and a direct current bus voltage signal, extracting voltage pulsation characteristics based on the direct current bus voltage signal, and determining a quadrature-axis current compensation initial value; the amplitude of the stator current signal is calculated, an inductance magnetization characteristic table is retrieved when the amplitude crosses a linear magnetization current threshold value, and the inductance drop proportion is determined; and correcting a quadrature-axis current compensation initial value by utilizing an inductance drop proportion, and injecting a corrected compensation instruction into a current adjusting ring. By fusing voltage pulsation sensing and a magnetic saturation correction mechanism, pulse load interference of a single-rotation period of the compressor is cooperatively offset, a torque output gap in a magnetic circuit saturation state is completed, and the compensation precision of the compressor is improved. And stator current oscillation in a low-frequency operation state is suppressed, and the torque response rigidity under all working conditions is maintained.

This invention provides a diesel generator set speed control method based on power feedforward, characterized by the following steps: Step M1: The generator set controller reads the current speed N and rated speed n of the diesel generator set from the speed sensor; reads the current active power P of the pulse load. t The active power P at the previous sampling time t' The current active power P t and the calculated power differential signal P e The signal is transmitted to the feedforward controller; Step M2: Calculate the feedback control signal; Step M3: Calculate the feedforward control signal Y. a Step M4: Feedback control signal and feedforward control signal Y a A voltage signal is generated by superimposing these signals using a specific algorithm and output to the electronic speed governor. This changes the oil supply, thereby altering the engine speed and bringing the power and speed deviations close to zero. This invention enables generator sets to achieve high-precision and rapid response to fast-dynamic loads such as pulse loads, and improves system stability.

The invention belongs to the technical field of automobile electronics, and provides an automobile wire harness fuse wire current-carrying capacity matching test method and system, and the method comprises the steps: building a standardized pulse loading profile, and expanding a constant current test into a composite dynamic test sequence covering peak thermal shock and average thermal accumulation; collecting a fuse thermal accumulation integral value and a wire insulation layer multi-point temperature, introducing a three-dimensional evaluation index, and identifying a thermal response asynchronous condition; respectively approaching the transient temperature rise limit of the wire and the thermal accumulation fusing boundary of the fuse by adopting a mode of gradually increasing the pulse peak value and the duty ratio, and determining a safety matching interval through cross comparison; and dividing matching levels according to the safety matching interval, respectively carrying out model selection optimization aiming at asynchronous risk and overheat priority failure combinations, and feeding back optimization results to model selection specifications. The problem of test distortion caused by thermal response asynchronization of the fuse and the wire under the dynamic pulse current is solved, and the matching reliability and the test accuracy of an automobile electrical system are improved.

A system and method for filtered visualization of dynamic load monitoring via a power distribution unit (PDU) collects power measurement data measured from each end device plugged into, and drawing operating power from, the PDU. The PDU collects the power measurement data into power state data over a line cycle or series of time intervals. Within the PDU, Kalman filtering determines a current power state estimate based on the measured power state data balanced with predictions of subsequent power state, as well as tuning parameters defining the balance from line cycle to line cycle. The resulting power state estimate may be displayed or presented to provide a more intuitive representation of operating power drawn by the end devices as opposed to raw power measurement data, which may be subject to fluctuation caused by high performance / AI pulsing loads.

The invention provides a frequency stability control method and system for a pulse load ship electric isolated network, and the method comprises the steps: constructing an energy flow map of the ship electric isolated network, and configuring an isolated network shock wave transmission model; when a pulse load is detected, the model is used to predict the diffusion of a frequency energy shock wave, and a reverse power flow for dissipating the shock wave is reversely calculated. A pulse load node is used as a space focus, and a beam forming algorithm is used to decompose the reverse power flow into original power instructions added with phase delay parameters and distributed to a plurality of distributed energy storage units. And performing time domain shaping on each original power instruction through an inertia damping control model for simulating physical characteristics, generating a target power instruction with a stress relaxation attenuation characteristic, and driving and executing the target power instruction. According to the invention, the compensation power of the plurality of energy storage units is focused on a disturbance source in space, so that the technical problems of low frequency suppression efficiency and secondary oscillation caused by response lag and spatial non-focusing in a traditional control method are solved.

This invention discloses a hierarchical collaborative control method, system, computer equipment, and storage medium for a hybrid energy storage system with a high-frequency pulse load. The method includes: establishing a hybrid energy storage system model for the high-frequency pulse load, including constructing a hybrid energy storage microgrid with a DC bus based on a fuel cell model, a lithium battery model, and a supercapacitor model; performing physical inertia analysis on the current response speed of a three-phase interleaved parallel converter model established based on the lithium battery model; and constructing an equivalent model of the high-frequency pulse load. The method involves power allocation of the hybrid energy storage system through a hierarchical collaborative control architecture using voltage and current dual closed-loop control of the DC bus. The hierarchical collaborative control architecture includes an energy management layer and a dynamic compensation layer. The energy management layer allocates load demand based on a frequency domain decoupling algorithm and power adjudication mechanism using filters, and the supercapacitor acts as a power balancing node to absorb high-frequency ripple and power residuals. The dynamic compensation layer overcomes the inductive physical inertia of the three-phase interleaved parallel converter through dynamic feedforward overdrive, achieving rapid power compensation for the pulse load instantaneously.

The application discloses a kind of three-port converter energy balance control method based on power distribution of pulse frequency sudden drop, in the case where load frequency suddenly drops, the power distribution mode of AC / DC converter is switched, and the fastest change rate that AC / DC converter can provide is controlled to control input source power linearly decreases and linearly increases, after a short adjustment time, energy storage capacitor charging and discharging can be balanced, then the system enters new steady state.Compared with load frequency sudden increase, when three-phase alternating current source input power is too small, pulse load frequency sudden drop is limited by the power distribution mode of AC / DC converter, and it can make pulse load voltage fluctuate, so that the dynamic recovery time of decoupling capacitor voltage is too long, and the original power distribution mode cannot meet the demand of pulse load, so the power distribution mode of AC / DC converter needs to be switched.The problem that the dynamic performance of existing pulse power compensation control method is not optimal after load pulse frequency suddenly drops is solved.

The invention relates to the technical field of electrochemical energy storage system control, in particular to an energy storage pulse cooperative control method and system based on electrochemical recovery. The method comprises the following steps: acquiring pulse characteristic parameters of a load through a high-frequency data acquisition device; constructing an electrochemical relaxation time constant model; calculating an effective recovery window of the battery, and generating a time domain matching result; dividing a plurality of virtual subsets in the logic layer in response to the fact that the time domain matching result represents that the natural dwell time is smaller than the effective recovery window; and constructing a multi-target cooperative scheduling model, and solving to obtain an optimal control sequence for completing energy storage pulse cooperative control. Through the mode, the technical problem that an existing electrochemical energy storage life management technology is poor in control strategy adaptability under the high-frequency pulse working condition is solved, and the dynamic response adaptability, the operation economy and the battery capacity release efficiency of an energy storage system under the pulse load scene are improved.

The invention relates to the field of electric energy quality treatment of an electric power system, and discloses a method for improving the electric energy quality of a limited-capacity system containing a pulse load, and the method comprises the following steps: S1, Clark conversion; s2, positive and negative sequence separation and Park transformation; s3, direct current component extraction; s4, performing inverse transformation and instruction synthesis, and synthesizing required compensation instruction current; s5, on the basis of a timing hysteresis comparison method, a fixed-frequency timer is used for replacing a traditional hysteresis comparator, current tracking of a fixed switching frequency is achieved, and the electric energy quality of a limited-capacity system containing a pulse load is improved, and the system is characterized by comprising a limited-capacity power source, the pulse load and an SVG device connected to an alternating-current bus in parallel; according to the scheme, through an improved SVG detection and control strategy, the electric energy quality problem of a limited capacity system containing a pulse load is effectively solved, and the power supply reliability and stability of the system are improved.

This invention discloses a high-energy hydroelectric detonation method using composite power pulse modulation, mainly comprising composite power modulation, load energy modulation, shock wave waveform modulation, and shock wave loading modulation. In composite power modulation, a composite power pulse is formed by superimposing a high-amplitude short-pulse pulse with a low-amplitude long-pulse pulse. In load energy modulation, a rapid phase transition of the metal wire is achieved through the high-amplitude component of the composite power pulse, and the plasma channel is maintained through the long-pulse component, igniting the metal powder to release energy. In shock wave waveform modulation, a high-amplitude shock wave is generated during the rapid phase transition stage of the metal wire, and a large-impulse shock wave is generated during the plasma channel expansion stage and the metal powder combustion stage; these two components are superimposed to regulate the shock wave waveform. In shock wave loading modulation, the intensity of the composite shock wave is adjusted according to measured rock parameters; the high-amplitude component is used to induce rock fracturing and reduce rock strength, while the large-impulse component is used to expand the fracturing range, achieving controllable rock fracturing.

This invention discloses a power supply system and control method for pulsed loads, belonging to the field of DC microgrid technology. The system includes a main power supply, a pulsed power supply, two DC-DC converters, and a DC bus. The DC bus is connected to an external pulsed load. The main power supply is connected to the DC bus via a first DC-DC converter, and the pulsed power supply is connected to the DC bus via a second DC-DC converter. At the beginning of each control cycle of the DC-DC converters, the output voltage of the first DC-DC converter, the inductor current values ​​of each DC-DC converter, and the current of the pulsed load are collected. Control signals for each switch in each DC-DC converter are obtained and corresponding control is performed to supply power to the pulsed load. This invention, in a DC microgrid, utilizes parallel decoupled power supply tailored to the characteristics of pulsed loads, enabling rapid response to the pulsed current demand at the load end and effectively reducing DC bus voltage ripple.

The application discloses a medium and high voltage and multi-working mode general dry load and load control system, relates to the technical field of power electronic devices, and the dry load comprises at least one load box, each load box comprises three solid-state circuit breakers and at least one load module; each load module comprises three load branches, each load branch comprises a fuse, a solid-state contactor and a resistor; through a control instruction, a target circuit breaker and a target solid-state contactor are closed, so that the load box is configured to be in one of a direct-current load carrying working mode, an alternating-current load carrying working mode, a high-power pulse load working mode, a nonlinear load working mode and a constant-power load working mode. The application is used to solve the problems of limited voltage, single function and slow response speed of the dry load in the prior art, ensure that the dry load is applicable to a medium and high voltage range, and improve the functional diversity and response speed of the dry load.

The application belongs to the technical field of power electronics and power supply control, and discloses a pulse load power supply control method with power fluctuation suppression, which comprises the following steps: collecting power output voltage, output current and load pulse current; performing valley value detection on the output voltage to obtain a capacitor voltage valley value; setting an output voltage reference signal and constructing a voltage closed-loop control to generate a current reference signal; performing low-pass filtering on the load pulse current to obtain an average load current; performing current closed-loop adjustment based on the current reference signal and the average load current to control the power output current, so that the power output power tends to the average load power. Through the above method, the power fluctuation on the input side of the power supply can be reduced, the stability of the power supply system can be improved, and the method is suitable for microgrids, independent power supply systems and limited capacity power supply scenarios.

The invention belongs to the technical field of electronic circuits, and particularly relates to a multi-band smooth switching control method suitable for pulse load broadband change. The method provided by the invention comprises two parts: a real-time calculation pulse load frequency identification algorithm and a multi-band on-off process of a change-over switch Sa. According to the identification algorithm for calculating the pulse load frequency in real time, when the pulse load frequency band changes from high to low, the change of the pulse load frequency can be identified more quickly, meanwhile, it is guaranteed that the pulse load frequency only changes when the actual frequency changes, and fluctuation of the frequency in one pulse load period is avoided.

This disclosure relates to a visualization filter for dynamic load monitoring. A filtered visualization system and method are provided for dynamic load monitoring via a distribution unit (PDU), which collects power measurement data from each terminal device that inserts into and draws operating power from the PDU. The PDU collects the power measurement data as power state data within a line cycle or time interval sequence. Within the PDU, a Kalman filter determines a current power state estimate based on a balance between predicted and measured power state data for subsequent power states and tuning parameters that define the balance between line cycles. The resulting power state estimate can be displayed or presented to provide a more intuitive representation of the operating power drawn by the terminal devices, rather than displaying or presenting the raw power measurement data that may be subject to fluctuations caused by high-performance / AI pulsed loads.

There are provided systems and methods comprising, for a power supply which has an output electrically coupled to at least one pulsed load, generating a signal VOV informative of a voltage VOUT at the output of the power supply, generating a signal VI<sub2>load < / sub2>informative of a current Iload required by the at least one pulsed load, wherein, for at least one given period of time, the current Iload comprises a series of pulses, generating a signal VI<sub2>in < / sub2>informative of a current Iin at an input of the power supply, feeding the signal VOV, the signal VI<sub2>load < / sub2>and the signal VI<sub2>in < / sub2>to a controller of the power supply, and controlling, by the controller, the current Iin such that the signal VI<sub2>in < / sub2>which is informative thereof, meets a predefined relationship with the signals VOV and VI<sub2>load< / sub2>.

The invention relates to the technical field of industrial and commercial energy storage system intelligent control, and discloses an industrial and commercial energy storage system intelligent control method and system. And estimating the amplitude and duration of the instantaneous power peak according to a preset equipment power characteristic file to obtain a pre-judged instantaneous power peak parameter. According to the method, the electric quantity state of the energy storage battery can be adjusted in advance, it is ensured that the battery has sufficient power response capacity during pulse load output, and the risks of voltage sag and equipment shutdown caused by insufficient electric quantity are effectively avoided.

This invention discloses a rectifier power supply and its control method for pulsed power decoupling, belonging to the field of converter technology. The rectifier power supply includes a controller, and sequentially connected power factor correction circuit, input capacitor, resonant isolation circuit, buffer capacitor, voltage correction circuit, and output capacitor. The resonant isolation circuit includes a resonant inverter circuit. The power factor correction circuit is also connected to an external AC power grid, and the output capacitor is also connected to an external pulsed load. The controller collects the input three-phase voltage, input three-phase current, and output voltage of the power factor correction circuit in real time, as well as the output voltage of the resonant isolation circuit and the voltage correction circuit. It then generates drive signals for each switching device in the power factor correction circuit, resonant isolation circuit, and voltage correction circuit, and performs corresponding control. This invention achieves constant grid-side power under pulsed loads, improving the power density and power quality of the rectifier power supply.

The invention discloses a battery voltage measurement method for pulse gap synchronous sampling, and relates to the technical field of battery voltage measurement. According to the method, a time domain isolation type sampling architecture is constructed, and a main power phase and an active measurement phase are divided in a 100kHz fixed-frequency PWM switching period through cooperation of a boost type drive circuit switching time sequence and an analog-to-digital conversion hardware level. The active measurement phase constructs a microsecond-level zero-current dead zone by using switch dead zone time, high-precision ADC sampling is triggered at the central moment of the dead zone, physical isolation of a signal and a power bus is realized through a CMOS analog switch during sampling, and an original sampling value is optimized through digital post-processing. According to the method, interference such as line voltage drop and switching noise under the dynamic working condition is avoided from the physical level, the measurement ripple is smaller than or equal to 5 mV, the error is smaller than 0.2%, the precision is improved by 40-60 times compared with that of a traditional method, the method is suitable for dynamic pulse load scenes such as solar street lamps, and accurate data support is provided for battery SOC estimation, SOH evaluation and intelligent dimming.

The invention discloses a power distribution terminal back-up power supply loading capacity monitoring device based on an analog pulse load, which is connected in series into a charging and discharging loop of a back-up power supply, and particularly relates to the technical field of on-line monitoring of power distribution terminal back-up power supplies. Comprising a main control unit, a battery parameter acquisition module, a pulse discharge module, a communication and early warning module, a modular expansion interface and a double-access interface unit. According to the invention, the switch operation load is simulated on line through the built-in adjustable pulse discharge module, and the instantaneous loading capacity of the power supply is truly tested; by combining multi-parameter acquisition and a closed-loop health assessment model, fusion of dynamic performance verification and static state diagnosis is realized, and the early warning accuracy is remarkably improved; the backup power supply has the functions of modular expansion, double access interfaces and multi-protocol communication, supports on-site early warning and remote monitoring, realizes active operation and maintenance and intelligent management of the backup power supply, and effectively improves the power supply reliability of a power distribution network.

This invention relates to the field of damage detection technology, and in particular to an AI-based method and system for detecting structural damage in supercapacitors. The method includes: acquiring multimodal response data; constructing operating condition labels by combining operating condition parameters; generating reference response data based on the operating condition labels; comparing the multimodal response data with the reference response data to construct a multimodal residual field; and performing structural damage identification by combining the unit topology diagram. This method helps to distinguish normal operating condition fluctuations caused by temperature fluctuations, changes in state of charge, pulse load changes, and equilibrium deviations from abnormal responses caused by structural damage, reducing the impact of operating condition coupling interference on the identification results, and making abnormal features related to structural damage more prominent. This improves the stability and accuracy of online structural damage identification, early localization, and damage type determination.