55 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.

The invention discloses a network construction type VSG power grid fault active support cooperative control method, and belongs to the technical field of new energy grid-connected control. According to the method, the power grid voltage is monitored in real time, and a cooperative strategy is dynamically triggered: when the voltage drops below a set value, a cooperative control mechanism is started, including (1) self-adaptive active power adjustment based on a power angle stability margin and dynamic correction of a power instruction value to suppress kinetic energy accumulation of a rotor; (2) voltage tracking type reactive compensation is superposed in a reactive control loop, reactive current is increased in real time according to the drop depth, continuous reactive support is provided, and steady-state overcurrent is restrained; and (3) inputting a virtual resistance inductor, and limiting a transient over-current peak value by suppressing a dq-axis coupling current component. When the voltage is normal, the conventional VSG control mode is maintained. According to the invention, power-reactive power-impedance three-dimensional cooperation is realized, power angle stability, current limitation and voltage support are considered, and the stability and active support capability of the network-forming VSG under the power grid drop fault are significantly improved.

The invention relates to the technical field of network construction type converter control, in particular to a network construction type converter power outer loop dynamic control fault ride-through method and system, and the method comprises the steps: constructing a VSG active-frequency control loop and a VSG reactive-voltage control loop; constructing a VSG control-based network construction type converter control loop on the basis of the control loop; during a fault period, the VSG is converted from an active control priority mode to a reactive control priority mode, the VSG dynamically adjusts an active power instruction value and a reactive power instruction value, the active power of the network-forming converter is reduced, and the reactive power is increased; and dynamically adjusting the active droop coefficient according to the voltage drop degree of the power grid, and recovering the power system after the fault is removed. According to the method, the short-term stability of the system is maintained by reducing the active power instruction value during the fault period, and meanwhile, the active droop coefficient is dynamically adjusted, so that the transient recovery process of the VSG after the fault is removed is optimized, and the fault ride-through capability and the transient stability are improved.

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 present invention belongs to the field of new energy power generation equipment, and in particular relates to a control method, system and storage medium for a doubly-fed wind turbine generator set, which obtains a real-time angular frequency deviation signal of a power grid. When the system frequency deviation is greater than a specified value, the bandwidth of a phase-locked loop is adjusted; and a final rotor d-axis current reference instruction is calculated; a reactive power reference instruction is calculated based on the q-axis current reference instruction, a reactive control link is introduced, and the rotor q-axis current reference instruction is calculated by a reactive controller; based on the new current reference signal, the doubly-fed wind turbine generator set generates a new control signal by an upper-level control loop, so that the doubly-fed wind turbine generator outputs corresponding active power and reactive power, thereby achieving rapid and active support for the power grid frequency; compared with the frequency control method implemented in the existing phase-locked loop, the method has the advantages of not requiring the introduction of a differential operator, fast frequency response, simple control structure, and no need to adjust the phase-locked loop bandwidth to a lower value, while maintaining the accuracy of the phase-locked loop phase angle tracking.

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 a coastal cargo ship power system and a control method, the coastal cargo ship power system comprises a power source module, an energy distribution and conversion module, an information perception and fusion module and an intelligent control module, and the core of the method is that a future planned route and meteorological sea condition information of a ship are obtained; carrying out predictive identification on the future navigation working condition based on the information by utilizing an intelligent control unit; the invention relates to the technical field of ship power, and in particular relates to a method for dynamically generating an optimal power distribution instruction for a main diesel generating set and a lithium ion battery energy storage system by adopting a predictive energy management algorithm, which comprises the following steps of: performing predictive identification on a navigation working condition by acquiring future route and sea condition information of a ship; and then a predictive energy management algorithm of an equivalent fuel consumption minimum strategy is adopted to dynamically generate an optimal power distribution instruction for the diesel engine and the lithium battery, so that the spanning from reactive control to predictive management is realized, and the fuel consumption and emission of the ship can be remarkably reduced.

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 fields of high temperature gas cooled reactor control rod, and discloses a high temperature gas cooled reactor core structure with embedded control rods, which comprises a cold helium channel, a second control rod extending along the axial direction of the cold helium channel and rotatably arranged around the axis of the cold helium channel, wherein the radial section of the second control rod is arc-shaped, and the number of the second control rods is equal to that of the cold helium channels; a control rod channel; and a first control rod extending along the axial direction of the control rod channel and slidably arranged along the axis of the control rod channel, wherein the number of the first control rods is not equal to that of the control rod channels.The present application has the beneficial effect that by arranging the second control rods in the cold helium channel, the number of adjusting rods and corresponding driving mechanisms in the first control rods can be reduced, the circumferential space can be saved, the staff can easily maintain and replace the adjusting rods, and the reactor can be easily controlled.

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.

The present application discloses a reactive power control method and system for flexible direct current (DC) transmission, belonging to the technical field of flexible DC transmission. The present application fully utilizes the reactive power capability of the flexible DC transmission system itself, outputs different reactive inner loop currents or reactive power instructions by judging the reactive control working mode, and realizes automatic control of the reactive power and voltage of the power grid, thereby avoiding frequent manual adjustment of reactive power by operators. The flexible DC transmission system utilizes the reactive power rapid response capability to rapidly adjust the AC voltage when the AC voltage is abnormal. At the same time, the flexible DC transmission system exchanges information with the reactive power control device of the power grid. The reactive power control device of the power grid inputs corresponding reactive capacitors and reactors according to the exchanged information, and replaces the additional reactive power output by the flexible DC transmission system, thereby meeting the dual requirements of steady-state reactive power control and fault reactive power control.

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 embodiment of the application relates to the field of reactor fuel elements and assembly thereof, in particular to a method for loading a reactor fuel assembly and a method for loading a lead-bismuth reactor. The method for loading the fuel assembly comprises the following steps: S10, reactor body installation is completed, a neutron source assembly and a simulation assembly are loaded into predetermined positions, a fuel assembly is transported to a loading site, a reactivity control system, nuclear measuring instruments and loading special tools are debugged, and experimental personnel are prepared; S20, a control rod is inserted into a reactor core, a reading of the nuclear measuring instruments is taken and recorded; S30, the loading special tools are operated, the simulation assembly in the predetermined position is taken out and placed into the fuel assembly; S40, the step S30 is repeated until loading of a predetermined number of fuel assemblies is completed, a reading of the nuclear measuring instruments is taken and recorded; and S50, the steps S30-S40 are repeated to complete loading of all fuel assemblies. The method for loading the fuel assembly of the reactor provided by the embodiment of the application is beneficial to ensuring that the reactor is safely loaded with the fuel assembly.

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 present invention relates to a double-layer collaborative reactive control strategy for a power system considering source-load uncertainty, which comprises the following steps: step S1: establishing a distribution network reactive optimization model; step S2: clustering distributed photovoltaic output and load historical data and constructing a probability distribution uncertainty set of a typical scenario; step S3: adopting a distributed blue-rod optimization method to establish a two-stage distributed blue-rod reactive optimization model for a distribution network; step S4: solving the two-stage distributed blue-rod reactive optimization model for each region using a column and constraint generation (column-and-constraint generation, C&CG) algorithm; step S5: constructing a distributed reactive optimization solution framework for a distribution network; step S6: adopting an adaptive super-relaxation penalty parameter alternating direction multiplier method (alternating direction method of multipliers, ADMM) to carry out global coordinated update solution. The present invention can significantly reduce electric energy loss and improve the economy and stability of the power system.

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 present invention belongs to the field of ship drive control systems, and in particular, relates to an icebreaker power system control system. The system comprises a reaction output and load synchronization control module, a heat exchange system water level control module, and a coupled power generation system output control module. The reaction output and load synchronization control module comprises a reaction temperature PID controller, a reactivity controller, and a reaction controller. The heat exchange system water level control module comprises a water level PID controller, a water supply PID controller, and an evaporator water level controller. The coupled power generation system output control module comprises a turbine speed controller, a steam valve opening PID controller, a steam valve controller, and an evaporator pressure controller. This system is primarily used to improve the coordinated control of the control system, enhance its ability to resist energy oscillations and various uncertainties, and enhance output stability.

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.