34 results about "Reactive control" patented technology

A downforce control system of a host vehicle includes: at least one module configured to generate a first bias lower bound and a first bias upper bound; a parameter module configured to determine a current understeering angle of the host vehicle; an adaptive bias bounding module configured to generate an understeer and oversteer multiplier based on the current understeering angle; a fusion module configured, based on the first bias lower bound, the first bias upper bound, and the understeer and oversteer multiplier, to generate a second bias lower bound and a second bias upper bound; and a downforce tracking module configured, based on the second bias lower bound and the second bias upper bound, to adjust position of one or more downforce devices of the host vehicle.

A control system for human-robot collaboration, including: a passive reactive control path implemented through a virtual damping system and configured to generate reactive control signals in response to human-applied interaction inputs; a predictive control path configured to generate predictive control signals based on predicted human performance objective inferred online from measured contact wrenches; and a signal blending component configured to combine the reactive control signals and the predictive control signals, wherein the predictive control signals are bounded in magnitude such that passivity of the reactive control path is preserved and stability of closed-loop human-robot interaction is maintained during collaboration.

The invention provides an energy storage type double-fed phase modifier transient synchronous supporting method and device and a medium, and relates to the technical field of electric power. The method comprises the following steps: when voltage drop and frequency disturbance occur in a power system, determining an adaptive reactive current proportionality coefficient according to a voltage deviation normalized value, a frequency deviation normalized value and a frequency change rate normalized value of a machine end of the energy storage type doubly-fed phase modifier by adopting a control strategy of reactive power priority and active power amplitude limiting by the energy storage type doubly-fed phase modifier; determining a target reactive current according to the adaptive reactive current proportionality coefficient so as to carry out reactive control on the energy storage type double-fed phase modifier; and in combination with the amplitude limiting effect of the virtual inertia control and the adaptive reactive current proportionality coefficient on the active current, obtaining a target active current so as to carry out active control on the energy storage type double-fed phase modifier. According to the invention, when voltage drop and frequency disturbance occur in a power system, the active and reactive output proportion can be dynamically adjusted, and the overall stability of voltage and frequency is improved.

The invention relates to the technical field of industrial automation and motor control, discloses a wide-temperature starting method and system for an industrial internet brushless motor, and aims to solve the problems of starting parameter mismatch, stalling or torque oscillation caused by physical delay of a temperature sensor and a reactive control strategy in the prior art. The method comprises the following steps: collecting thermal state and electric state data of a motor in real time, and constructing a multi-dimensional time sequence characteristic matrix; predicting a future temperature trajectory through an eight-bit integer quantization LSTM model deployed at an edge end; a global thermal environment early warning instruction issued by the cloud is fused, and a corrected temperature track is generated; based on the track, calculating an optimal starting control parameter by using a motor physical parameterization model and executing starting; and after starting is completed, uploading a data log for iteration of the cloud model. According to the application, the starting reliability and the control performance of the brushless motor in a wide temperature range are remarkably improved through an edge cloud collaborative zero-lag temperature prediction and prospective parameter generation mechanism.

To plan a protection control plan at a low operation cost while satisfying a dynamic constraint condition on reliability in a device for planning the protection control plan by combining preventive control and post-control.SOLUTION: A protection control plan planning device according to the present invention includes a predicted state generation section that generates a future predicted state of a power system, a first protection control plan planning section that plans a first protection control plan of the power system that satisfies a constraint condition related to control of the power system in the predicted state of the power system, a second protection control plan planning section that can plan a second protection control plan of the power system that satisfies the constraint condition when an assumed accident occurs in the predicted state of the power system, and a planning plan change section that creates predetermined information related to the constraint condition for changing a plan content of at least one of the first protection control plan and the second protection control plan when the second protection control plan planning section cannot plan the second protection control plan that satisfies the constraint condition.SELECTED DRAWING: Figure 1

Methods and systems for controlling one or more pumps of a heart-lung-machine. An illustrative method may comprise receiving an actual flow rate of a pump, determining the actual flow rate is from a primary pump, determining an available amount of the actual flow rate of the primary pump that is available to one or more subordinate pumps, comparing the available amount of the actual flow rate of the primary pump to a sum of set flow rates of the one or more subordinate pumps, and operating the one or more subordinate pumps in a proactive control mode or a reactive control mode.

The application provides a static SVG device suitable for heavy load of a locomotive, relates to the field of railway power supply, and comprises a three-phase MMC converter, the three-phase MMC converter comprises three-phase bridge arms, each phase bridge arm is composed of an upper bridge arm and a lower bridge arm, the upper bridge arm comprises a plurality of cascaded half-bridge sub-modules, and the lower bridge arm comprises a plurality of cascaded half-bridge sub-modules, wherein the energy storage elements of the half-bridge sub-modules at least comprise super capacitors; further comprising: a voltage balancing module, which is used for determining the number of real-time input half-bridge sub-modules of the upper bridge arm and the lower bridge arm of each phase bridge arm, and determining the real-time input half-bridge sub-modules of the upper bridge arm and the lower bridge arm of each phase bridge arm based on the number of real-time input half-bridge sub-modules of the upper bridge arm and the lower bridge arm of each phase bridge arm; a network-forming voltage source control module, which is used for active control, reactive control and virtual impedance control, has the advantages of adapting to heavy load of a locomotive and improving the stability of power system operation.

The invention provides static SVG equipment suitable for heavy load locomotive load, and relates to the field of railway power supply, the static SVG equipment comprises a three-phase MMC converter, the three-phase MMC converter comprises three phases of bridge arms, each phase of bridge arm is composed of an upper bridge arm and a lower bridge arm, the upper bridge arm comprises a plurality of cascaded half-bridge sub-models, and the lower bridge arm comprises a plurality of cascaded half-bridge sub-modules, the energy storage element of the half-bridge sub-module at least comprises a super capacitor; the voltage balancing module is used for determining the number of the half-bridge sub-modules which are put into the upper bridge arm and the lower bridge arm of each phase of bridge arm in real time, and determining the half-bridge sub-modules which are put into the upper bridge arm and the lower bridge arm of each phase of bridge arm in real time based on the number of the half-bridge sub-modules which are put into the upper bridge arm and the lower bridge arm of each phase of bridge arm in real time; and the network construction type voltage source control module is used for performing active control, reactive control and virtual impedance control, and has the advantages of adapting to heavy-load locomotive load and improving the operation stability of a power system.

The invention belongs to the technical field of vehicle power supply management, and relates to a special vehicle vibration adaptive power supply voltage stabilization method and a chopping control system, and the method comprises the following steps: generating an original vibration voltage signal corresponding to the vibration intensity; filtering and amplifying the original vibration voltage signal to generate a vibration feedforward signal; multiplying the vibration feed-forward signal by a preset compensation coefficient, and adding the product with a preset static reference voltage value to generate a dynamic reference voltage; collecting and conditioning the signal in real time to generate an actual output voltage value reflecting the current electrical output state; scaling the amplitude of the error voltage signal according to a preset safety threshold to generate a regulation error signal; a pulse control sequence is generated through a switch driving circuit so as to modulate the conduction duty ratio of a switch transistor in the chopping module, adjust the operation state of a chopping switch and output self-adaptive stable voltage. According to the invention, the problem that the response speed is often insufficient due to inherent sensing, calculation and execution delay of reactive control is solved.

The invention discloses a power oscillation suppression method for a grid-forming type energy storage converter parallel system, and belongs to the field of micro-grid power utilization. Acquiring a three-phase output voltage and a three-phase current; calculating instantaneous active power and reactive power by using the three-phase voltage and the three-phase current, and constructing an active power control loop and a reactive power control loop; calculating an active damping compensation amount; angular frequency required by the system and a system phase damping an oscillation component in the active power are calculated; calculating a reactive power damping compensation amount; calculating a reference voltage amplitude required by the system and damping an oscillation component in reactive power; a three-phase voltage, a three-phase current, a system phase damping an oscillation component in active power and a reference voltage amplitude damping an oscillation component in reactive power are sent to a voltage control loop and a current control loop to generate a modulation signal and convert the modulation signal into a control signal, and the control signal acts on a converter so as to suppress oscillation. Damping compensation branches are designed from an active control loop and a reactive control loop, system damping is greatly increased, and the interactive oscillation phenomenon of the grid-forming type energy storage converter parallel system can be effectively restrained.

The invention discloses an active tracking and covering method based on a channel knowledge map in a mobile antenna system, which aims to maximize the total spectrum efficiency in a service period by expressing an active tracking and covering task of mobile user equipment as a long-term trajectory optimization problem of a mobile antenna. Accurately modeling a dependency relationship of a channel on each surface freedom degree of the antenna by using a control parameter obtained based on a Rodrigues rotation matrix; key physical feasibility constraint conditions are systematically integrated, so that the feasibility of an optimization result in engineering is ensured; a channel knowledge map is introduced to realize proactive planning, and traditional reactive control is converted into active planning by utilizing prediction information, so that performance loss caused by channel information lag is reduced; on the basis of a manifold optimization framework, rotation parameters of the movable antenna system are mapped to a special orthogonal group manifold for optimization, rotation constraints are processed through Lie group operation, and singularity and calculation redundancy caused by traditional parameterization are avoided.

An automation and motion control system and method to control a plurality of theatrical objects. The control system includes a plurality of nodes and an operator console node in communication with each other over a real time network. The node corresponds to a device for control of a theatrical object. Each node of the plurality of nodes and the operator console node include a microprocessor and a memory device. The operator console node further includes a stored control path submodule, a manual control submodule and a reactive control submodule. Each of the stored control path submodule, the manual control submodule and the reactive control submodule generate an independent control signal. An active control submodule generates a summed control signal in response to the independent control signals from the stored control path submodule, the manual control submodule and the reactive control submodule. The summed control signal is provided to a node process, providing control to at least one device.

Apparatus and methods are provided herein. In certain embodiments, a reactance control apparatus for a showerhead in a processing chamber includes a bottom edge disposed to contact at least a portion of a top surface of the showerhead. The reactance control device may include a body surface having an inner connection edge and an outer periphery connected to the bottom edge via a sidewall, the inner connection edge having a smaller diameter than the outer periphery of the body surface, where the inner connection edge defines a bore configured to receive a portion of a shaft of the showerhead, and where the bore is configured to receive a portion of the shaft of the showerhead. And the inner connecting edge is further configured to engage with a mounting device disposed near the shaft portion of the showerhead in order to secure the reactance control device to the showerhead.

The present application relates to the technical field of power system, disclose a kind of station SVG reactive dead zone hedging distribution strategy and device.The station SVG reactive dead zone hedging distribution strategy of the present application includes the following steps: obtaining application station information;Obtain total reactive demand Q req ;Based on total reactive demand Q req , determine minimum constraint target T min Calculation method;Iterative solution minimum constraint target T min And store corresponding calculation result;Based on the total reactive demand and the minimum constraint target T min , determine the reactive power distribution strategy corresponding to each available SVG, obtain reactive power instruction matrix.The station SVG reactive dead zone hedging distribution strategy of the present application can realize the accurate distribution of reactive power instruction under different SVG rated capacity and different SVG reactive dead zone, improve the precision of station reactive control;It can be realized that each SVG reactive output load is minimum under the premise of meeting total reactive demand, corresponding SVG device loss is minimum, and the operating life of SVG device is improved.

An automation and motion control system and method to provide motion to a theatrical object. The control system includes a plurality of nodes in communication with each other. The node corresponds to a device for control of a theatrical object. Each node of the plurality of nodes includes a microprocessor and a memory device. At least one node further includes a stored control path submodule, a manual control submodule and a reactive control submodule. The stored control path, the manual control and the reactive control submodules generate an independent control signal. An active control submodule generates a summed control signal in response to the independent control signals from the stored control path submodule, the manual control submodule and the reactive control submodule. The summed control signal is provided to a node process, providing control to at least one device to provide motion to the theatrical object.

The application discloses a control method for suppressing power grid oscillation of a converter based on synchronous control, comprising the following steps: designing a damping gain coefficient of reactive additional damping control and a band-pass filter parameter; obtaining an AC side current of the converter and a grid-connected point voltage, and decomposing the same to obtain components, obtaining an output angular frequency, active power and reactive power of the converter, obtaining a grid-connected point voltage amplitude of the converter, and obtaining an angular frequency rated value; subtracting the output angular frequency of the converter from the angular frequency rated value to obtain an input signal, obtaining a damping reactive power output signal through a damping gain link and a band-pass filter, and introducing the damping reactive power output signal into a reactive control link in a control loop of the converter; calculating a phase of the converter, calculating a grid-connected point voltage, an AC side current and an AC side modulation voltage of the converter; calculating a voltage of the AC side modulation voltage of the converter in a stationary coordinate system, and forming a corresponding pulse signal according to the voltage in the stationary coordinate system to realize control of the converter.

The present application relates to a kind of mixed embedded DC transmission system inter-type reactive resource steady-state collaborative control method, first, based on the steady-state voltage regulation requirement of conventional embedded DC bus, obtain the reactive-voltage sensitivity coefficient index of flexible and conventional embedded DC;Second, according to the reactive-voltage sensitivity coefficient index and the reference voltage value of conventional DC bus operation, obtain the reactive demand of conventional embedded DC voltage steady-state operation and the reactive adjustable amount of flexible converter station, and the type of reactive resource participating in voltage regulation is clear;If the type of reactive resource participating in voltage regulation is only flexible converter station, set the fixed reactive control conversion reference value input of flexible converter station;Otherwise, the reactive compensation device inside conventional embedded DC converter station needs to be switched.This application fully taps the potential of mixed embedded DC reactive resource, which helps to improve the efficiency and economy of mixed embedded DC transmission system voltage steady-state operation.

The application discloses a DC engineering reactive state change pre-judgment DC transmission power upper limit method, comprising the following steps: (S1) obtaining a preset reactive state; (S2) setting the running valve group power in the preset reactive state as a valve group limit transmission power value; (S3) performing control calculation according to a reactive control strategy; (S4) outputting a reactive control strategy calculation result; (S5) judging whether there is a reactive device switching, a control command and a reactive control mode switching command in the calculation result; if there is a corresponding command, updating the corresponding preset reactive device state and reactive control function setting value, and performing (S3); if there is no corresponding command, performing (S6); (S6) calculating the DC transmission power upper limit under the current preset reactive state according to the valve group state adjustment command in the calculation result; and (S7) outputting the DC transmission power upper limit under the current preset reactive state. The application has the advantages of no need of manual judgment and simulation resources, short time consumption, accuracy and reliability, convenience and practicality.

The invention provides a low-frequency oscillation suppression method and device for a multi-virtual synchronous generator parallel system, and belongs to the field of micro-grid oscillation suppression. The method comprises the following steps: acquiring electrical characteristic parameters of a virtual synchronous generator (VSG) in a parallel system of a plurality of virtual synchronous generators; inputting the electrical characteristic parameters into a target control loop to obtain a target control quantity of the VSG; controlling the VSG according to the target control quantity; wherein the target control loop comprises an active control loop and a reactive control loop; a compensation item is arranged in the active control ring; the compensation item represents the combination of the high-frequency component of the angular frequency and the high-frequency component of the active power; the compensation item is used for improving transient damping of the parallel system of the multiple virtual synchronous generators. According to the invention, the transient damping of the system can be improved and the power oscillation of the system can be suppressed in a distributed form without influencing the steady-state characteristics of the system, and during control, communication among VSGs is not needed, so that the dependence on communication is completely eliminated.

The invention relates to the technical field of power grid fault ride-through, in particular to a transient overcurrent suppression method and system combining an active loop and a reactive loop. Adjusting the bandwidth according to the voltage drop degree of the fault point by using an active loop fault voltage adaptive linear active disturbance rejection control method; a reactive power ring smooth switching method is introduced, and a reactive power ring reference value is switched from 0 to a given reference value in a slope form to stabilize a fault transient overcurrent amplitude. According to the method, under the extreme scene of voltage drop, the grid-connected current peak value ratio is obviously lower than that of a traditional method, the problem that an inverter breaks down and even is burnt down due to overcurrent is effectively avoided, and the low-voltage ride-through capacity of a photovoltaic grid-connected system is guaranteed; by adopting a reactive smooth switching strategy, the fault transient overcurrent amplitude is stabilized, and the stability of the system in the reactive control process is improved.

The invention relates to the technical field of nuclear reactor design, and particularly discloses a lead-based fast neutron high-flux research reactor which comprises a container, a fuel assembly and a reactivity control system, and the fuel assembly is arranged in the container. The reactivity control system comprises an electric control device, a gas pressure control device and a gas volume control device; the electric control device, the gas pressure control device and the gas volume control device are sequentially arranged from inside to outside in the radial direction of the reactor core; the sum of the total reactivity values of the reactivity control systems is configured to be sufficient to enter and maintain the core at a prescribed subcritical depth under the worst residual reactivity conditions. Therefore, reactivity control means can be enriched, and the problem of limitation of a reactivity control mode of a nuclear reactor in a lead-based fast neutron high-flux research reactor can be solved.

The application provides a kind of adaptive reactive phase angle droop control method and system based on state of charge perception, by real-time sensing energy storage unit state of charge (SOC), adaptive active amplitude and reactive phase angle adaptive reactive phase angle droop controller is constructed, the power distribution weight of each unit is dynamically adjusted, and the SOC balance of energy storage converter is realized. At the same time, in order to meet the demand of frequency sensitive load, the frequency is locked by directly modifying the phase angle in the reactive control loop, and the frequency stability in the dynamic power regulation process is ensured. The application can realize the accurate autonomous balance of the aggregated power of each distributed energy storage converter cluster under off-grid operation, provide network support for voltage and frequency at the point of common coupling, and improve the operation reliability and power quality of the energy storage converter cluster.

The invention relates to the technical field of power distribution reactive voltage control, and discloses a distributed-in-place two-stage voltage control method, system, device and medium, and the method comprises the steps: solving the reactive power output of a photovoltaic inverter in a distributed photovoltaic cluster with the minimum voltage deviation in the cluster as a target, and calculating the reactive power output of the photovoltaic inverter in the cluster; and iteratively interacting cluster boundary variables through an alternating direction multiplier algorithm so as to realize cooperation of reactive power control strategies among different photovoltaic clusters. In the on-site control stage, it is considered that the reactive power control strategy obtained in the distributed cooperation stage is not suitable any more due to the fact that the strong volatility of distributed photovoltaic is likely to cause. A Q-P affine control strategy is formulated by photovoltaic power in each edge cluster by taking a reactive power strategy of a distributed coordination stage as a basic value, reactive power output of the photovoltaic power is adjusted in real time according to active power fluctuation of the photovoltaic power, and a control curve is segmented through a spatial dimension raising method, so that the flexibility of a local control strategy is further improved.

The invention discloses a doubly-fed wind turbine generator inertia response control method, device and equipment, and relates to the field of new energy power generation equipment, and the method comprises the steps: setting the bandwidth of a phase-locked loop according to the conventional design requirements of a project, and obtaining a frequency deviation signal through the phase-locked loop; when it is detected that the frequency deviation signal is larger than a specified value, an active control loop is cut off, and a rotor d-axis current reference instruction is calculated according to the active power reference instruction; the detected q-axis voltage is processed through an inertia link to obtain an additional reactive power control loop feedback input signal; obtaining a difference value between the reactive power reference signal and an additional reactive power control loop feedback input signal and an original reactive power feedback signal as a reactive power error signal; obtaining a rotor q-axis current reference instruction according to the reactive power error signal; and based on the rotor d-axis current reference instruction and the rotor q-axis current reference instruction, generating a new control signal by an upper control loop, and driving the doubly-fed wind turbine generator to output corresponding active power and reactive power.

This disclosure relates to the field of simulation technology, providing a method and apparatus for simulating limit faults in a high-temperature gas-cooled reactor (HTGR) control rod system. The method includes: receiving a limit fault simulation type input by a user; determining a simulation operation corresponding to the limit fault simulation type; and performing a limit fault simulation on the control rod system according to the simulation operation to obtain a simulation result corresponding to the limit fault simulation type. This disclosure effectively demonstrates the simulated phenomena and logic control simulation of limit faults in a HTGR control rod system. It can be applied to training scenarios for control rod system fault handling, thereby further improving the control rod system training system, enhancing the fault diagnosis and handling capabilities of HTGR operators, and evaluating the operators' basic reactive control capabilities and monitoring and reaction capabilities during control rod movement.

The application discloses a kind of electric vehicle driving and braking torque collaborative distribution method, device, equipment and medium.The method comprises: obtaining real-time motion parameters and constructing observation vector;Estimate state vector by state observer;Calculate each tire adhesion margin;Predict future state based on three degrees of freedom vehicle dynamics model;Additional yaw moment optimization problem is constructed, and current additional yaw moment required is obtained;According to driving intention, obtain the total vehicle driving force;With additional yaw moment and total driving force to four wheels as task, construct objective function, and solve optimal torque command with each tire adhesion margin as constraint;Accordingly realize torque collaborative distribution.The application estimates adhesion margin in real time and sets safety constraint, changes "after the fact remedy" to "prevention", fundamentally eliminates the hysteresis problem of reactive control, simultaneously solves longitudinal and lateral dynamics coupling problem, realizes stability, tracking and economy Global optimization.

This invention discloses a safety access and reachability domain control method and system for electric water heaters designed for use by mothers and infants. Relating to the field of household appliance technology, this invention addresses the shortcomings of existing electric water heaters that commonly employ reactive control in mother-and-infant scenarios. These methods fail to fundamentally solve the temperature surge problem caused by the thermal inertia of the heating unit, and safety constraints are easily overridden by user settings, posing a high risk of scalding. This invention detects whether the water heater is in mother-and-infant use mode, collects operating parameters before heating starts, constructs a mother-and-infant safety reachability domain, performs a pre-heating safety access judgment, limits the power within the reachability domain during heating operation, and applies system-level safety constraints. In abnormal operating conditions, it switches to the lowest safe power operation. This invention can prevent temperature surges from the source, improve the inherent safety of mother-and-infant water use, reduce secondary risks from abnormal operating conditions, and facilitate engineering-scale application.

The invention discloses an Internet of Things central air conditioner intelligent control system and method based on cloud computing, relates to the technical field of central air conditioner intelligent control, and realizes accurate dynamic regulation and control of a central air conditioner fresh air system through real-time acquisition and fusion analysis of indoor and outdoor multi-dimensional environment data. Compared with a traditional control mode, the method has the advantages that the fresh air volume can be accurately supplied according to actual requirements such as the personnel density and the indoor pollutant concentration, so that the energy consumption of the system is obviously optimized while the indoor air is always kept at a healthy level; according to the invention, through introduction of analysis of historical data and external information, predictive and prospective control is realized. The system can pre-judge future personnel load change and outdoor air quality trend, layout and adjustment of a control strategy are performed in advance, hysteresis of traditional reactive control is effectively avoided, system operation is more stable and efficient, and stability and comfort of an indoor environment are improved.

The invention relates to the technical field of engine tail gas after-treatment, and discloses a particle trap multi-mode regeneration energy consumption optimization control method and system. The method comprises the following steps: constructing a multi-scale dynamic model of a regeneration process to represent state evolution behaviors under different time granularities from a transient state to a long term; collecting and verifying real-time state flow data based on the model, and generating a multi-dimensional feature vector reflecting a regeneration state; carrying out predictive analysis on regeneration energy consumption by utilizing the feature vector, and outputting a potential risk index; and finally, adaptively adjusting the regeneration mode according to the index. According to the method, the complex evolution law of the regeneration process is accurately captured through multi-scale dynamic modeling, early recognition and feed-forward adjustment of the energy consumption risk are achieved in combination with predictive control, the defects of traditional single-scale reactive control are overcome, and the energy consumption efficiency and control reliability of the regeneration process are improved.

The application provides an electric vehicle chassis pre-control method and system based on artificial intelligence, and relates to the technical field of artificial intelligence, wherein the method comprises the following steps: based on artificial intelligence, determining a pre-control scheme for making the chassis performance achieve global optimal response according to the future driving road conditions of the electric vehicle; and executing the pre-control scheme. The application utilizes artificial intelligence technology to prospectively analyze future road condition information of the electric vehicle about to enter, and calculates a control strategy capable of making the chassis system achieve global performance optimization on the whole predicted journey or key road section, and executes the scheme in advance, so as to overcome the delay and local optimization limitation of traditional reactive control, and improve the performance potential of the chassis.