22 results about "Excitation controller" patented technology

The invention discloses a synchronous generator excitation method based on mathematical modeling and gain scheduling, and relates to the technical field of synchronous generator control, and the method comprises the steps: building a synchronous generator global dynamic mathematical model comprising the electromagnetic dynamic characteristics of a stator winding, a rotor winding and a damping winding through a modeling module; a discretization simulation platform is constructed in a Matlab / Simulink environment by utilizing a simulation module, model parameters are corrected, dynamic adjustment is realized through a gain scheduling excitation controller, an automatic voltage regulator (AVR) adopts PID (Proportion Integration Differentiation) control and comprises a voltage deviation integral separation strategy, and a power system stabilizer (PSS) dynamically adjusts parameters of a lead-lag compensator based on active power. According to the method, the deviation between a model and an actual system can be reduced by more than 30%, the electromechanical oscillation damping ratio within the rated power range of 10%-150% is increased by 25%-40%, the harmonic content of exciting current is reduced to be lower than 5%, the stability of an electric power system and the electric energy quality are remarkably improved, the engineering practicability is high, and the method is easy to transform and upgrade on an existing synchronous generator.

The embodiment of the invention relates to the technical field of induction pumps, in particular to a high-temperature liquid metal electromagnetic pump which comprises a main body, an inductor, a temperature sensor and an excitation controller. The main body is hermetically connected with a conveying piece for conveying high-temperature liquid metal; the inductor is arranged to enable the high-temperature liquid metal in the main body to generate induction current and enable the high-temperature liquid metal to generate pressure difference at different positions of the main body, so that the high-temperature liquid metal can flow at different positions; the temperature sensor monitors the temperature in the main body; the excitation controller is set to be capable of adjusting the power supply voltage and frequency of the inductor; the main body is arranged to be capable of preventing heat transfer of the high-temperature liquid metal to the inductor. The electromagnetic pump can meet the sealing requirement of high-temperature liquid metal conveying; flow control is facilitated, and the requirement for controllable conveying of high-temperature liquid metal in the molten salt electrolysis dry-method technological process is met; the failure of the high-temperature liquid metal electromagnetic pump can be avoided, and the operation stability and reliability of the electromagnetic pump can be improved.

The invention discloses a rail grinding wagon power seamless conversion control method. The method comprises the following steps that S1, an IO module collects a power supply mode signal; s2) in a power supply mode of the generator set, after the generator set is started, the main control module issues an uncontrollably rectified intermediate direct current target voltage Ud and an excitation allowing signal to the excitation controller through logical operation; the excitation controller uses the issued intermediate direct current rated voltage Ud as a target voltage to adjust the excitation current of the generator set so as to ensure the stability of the intermediate direct current voltage; and S3) in a contact network power supply mode, after the pantograph rises and the vacuum circuit breaker of the network side cabinet is closed, the traction control unit controls four-quadrant rectification of the traction auxiliary converter to adjust the duty ratio by taking the intermediate direct current rated voltage Ud as the target voltage so as to ensure the stability of the intermediate direct current voltage. According to the invention, the technical problem of ensuring the power and operation continuity in the overhead line system split-phase region can be solved.

This application discloses a remote excitation control method, apparatus, and equipment for seismic exploration based on a cluster approach, belonging to the field of oil and gas seismic exploration. The method includes: in response to remote control of multiple seismic exploration projects, sending a working instruction to the excitation controller of each of the multiple seismic exploration projects; for any seismic exploration project, in response to receiving excitation preparation information from the excitation controller of that project, determining the shot point to be excited and the excitation time of the shot point corresponding to the excitation preparation information based on the excitation rules of the seismic exploration project; and sending an excitation instruction to the excitation controller. The above technical solution realizes remote centralized excitation control of multiple seismic exploration projects in different regions, greatly reducing the number of operators required and their labor intensity, and effectively improving the overall construction efficiency of multiple seismic exploration projects.

The application discloses a kind of suspended tunnel structure wave flow test device, comprising: test pool, wave and current generating device, plastic net wave-absorbing device, vibrating table, extension platform, excitation controller, suspended pipe body model, anchor cable and hydrodynamic test system.The application can apply controllable multi-point excitation, and can also test the hydrodynamic response of suspended tunnel to simulated earthquake simultaneously, and can adjust the excitation size, position and range according to actual model requirements, so as to realize response analysis and coordinated control under the combined action of multi-point different excitation earthquake and wave flow.

The utility model relates to the technical field of power generation devices, and discloses a doubly-fed asynchronous power generation device with multiple variable-current modes, which comprises a power grid, a doubly-fed asynchronous power generator, a machine-side converter, a grid-side converter, a variable-current controller and a direct-current excitation controller, a stator winding of the doubly-fed asynchronous generator is connected with a power grid, a rotor winding of the doubly-fed asynchronous generator is connected with the machine-side converter, the machine-side converter is connected with the grid-side converter, and the grid-side converter is connected with the power grid. The variable-current controller is connected with the direct-current excitation controller, the machine-side converter, the grid-side converter, the stator grid-connected switch and the converter grid-connected switch; the variable-current controller is used for controlling the running states of the machine-side converter, the grid-side converter, the stator grid-connected switch and the converter grid-connected switch; the direct current excitation controller is connected with the doubly-fed asynchronous generator, and the direct current excitation controller is used for performing direct current excitation on the doubly-fed asynchronous generator. The operation efficiency and stability of the power generation device under different working conditions can be improved.

Various examples are provided related to bimodal electron paramagnetic resonance (EPR). In one example, a bimodal resonator includes a detection coil; first and second excitation coils, where the excitation coils are non-parallel separated by a fixed angle; and excitation controllers coupled to the first and second excitation coils. The excitation controllers can adjust radio frequency (RF) fields generated by the first and second excitation coils to produce a resonator field substantially parallel with the detection coil. In another example, a method including generating a first RF field by exciting the first excitation coil; generating a second RF field by exciting the second excitation coil; and producing a resonator field substantially parallel with a detection coil of the bimodal resonator by adjusting the RE field of the first excitation coil, the RF filed of the second excitation coil, or both.

The invention provides a wind and light power generation system and method. The system comprises a photovoltaic cell panel, an excitation controller, a wind turbine, a synchronous generator, a synchronous controller and a first grid-connected switch. The photovoltaic cell panel is used for supplying power to the excitation controller, the excitation controller is used for providing excitation current for an excitation winding of the synchronous generator, the wind turbine is used for driving a power winding of the synchronous generator to rotate, and the synchronous controller is used for controlling the synchronous generator to rotate under the condition that electric signals of a first position and electric signals of a second position meet grid connection conditions. And closing the first grid-connected switch to enable the synchronous generator to be communicated with the power grid. Wind power and photovoltaic power are combined, single-phase flow of power grid-new energy power is realized by adopting a wind-solar integrated cooperative control method, repetition of power grid tidal current directions is avoided, green power is provided to the maximum extent, and unit starting under zero voltage can be realized. And the problems of investment increase and kilowatt-hour cost increase caused by the fact that electric energy quality treatment equipment needs to be added in a traditional method are solved.

The invention belongs to the field of mining dump truck power control, and particularly relates to a mining dump truck power self-adaptive control method which comprises the following steps: on the basis of an optimal load rotating speed-power output curve of an engine, a driving system controller calculates the optimal load output power and the actual output power of the engine according to the running state and the working condition of a vehicle; a power sliding model is established according to working conditions of a mine car, and an optimal load rotating speed-power output curve of an engine is adjusted through an excitation controller, so that an optimal load rotating speed-power self-adaptive model of the engine with a power sliding threshold value is obtained, and self-adaptive control is performed on output power of the engine. According to the method, the actual output power of the engine can be adjusted in time under the condition that the rotating speed of the engine is not changed, so that the power requirements of the dumper under different working conditions are met, and potential safety hazards caused by engine rotating speed reduction are solved.

The present application relates to the technical field of power repair and emergency power supply, and particularly relates to a diesel generator set group parallel operation control method and system based on fuzzy PID control. Real-time operation parameters of the diesel generator set are acquired to construct a fuzzy PID control input vector; a mapping relationship table between the control input vector and a preset parallel operation fuzzy PID control rule is established; a weighted average algorithm is used for defuzzy calculation to obtain a real-time PID parameter correction amount and correct the current PID control parameter; after voltage leveling, frequency adjustment and phase calibration of each unit based on automatic quasi-synchronous parallel operation logic, the units are connected in parallel to construct a parallel control group; power distribution is performed on the speed regulator and excitation controller of each unit according to the real-time fuzzy PID control parameter, and cyclic adjustment is performed until the error converges. The problems of poor parallel operation stability and uneven power distribution of the diesel generator set group caused by fixed traditional PID control parameters are solved, intelligent control of multi-unit parallel operation is realized, and the system operation stability and efficiency are improved.

The invention discloses a power seamless conversion control device and system and a steel rail grinding wagon. An excitation controller is connected with a main control module, the main control module is connected with an IO module, and a traction control unit is connected with the main control module. The IO module collects a power supply mode signal, and when in a generator set power supply mode, after a generator set is started, the master control module issues an uncontrollably rectified intermediate direct current target voltage and an excitation allowing signal to the excitation controller through logical operation. And the excitation controller regulates the excitation current of the generator set by taking the issued intermediate direct current rated voltage as a target voltage so as to ensure that the intermediate direct current voltage is stable. When the system is in a contact network power supply mode, a pantograph rises, and a network side cabinet vacuum circuit breaker is closed, the traction control unit controls four-quadrant rectification of the traction auxiliary converter to adjust the duty ratio by taking an intermediate direct current rated voltage as a target voltage so as to ensure that the intermediate direct current voltage is stable. According to the invention, the technical problem of ensuring the power and operation continuity in the overhead line system split-phase region can be solved.

The utility model belongs to the technical field of waste heat and residual pressure generator sets, and relates to an excitation centralized control system for a small-sized waste heat and residual pressure generator set, which comprises an excitation controller, and a first terminal, a second terminal, a third terminal and a fourth terminal on the excitation controller are respectively connected to a positive electrode of a power supply. A terminal at the bottom of the excitation controller is connected to the negative electrode of the power supply, the rear side of the excitation controller is connected to the measurement and control device, one side of the measurement and control device is connected to the server, the server is connected to the monitoring main station, and the positive electrode of the power supply is divided into two paths to be connected to two contacts at the top of the field suppression switch, and two contacts at the bottom of the field suppression switch are connected to a power supply cathode. According to the utility model, the centralized control system is used for controlling the excitation control system of the waste heat and waste pressure generator set, and parameters of all generator set excitation systems in a metallurgical enterprise are collected and uploaded through the server and communication technology, so that the line loss is reduced, and the power generation income is increased.

The present invention discloses a method and system for automatically controlling parallel operation of diesel generator sets, relating to the field of generator set control technology. The method comprises the following steps: collecting electrical and mechanical parameters of the generator sets to be paralleled; using the electrical and mechanical parameters to establish a double-layer coupling model, which is used to calculate the time interval that satisfies the paralleling conditions; determining a target power distribution value and an adjustment path after the paralleling conditions are detected; and executing control instructions generated based on the target power distribution value and the adjustment path to control circuit breaker closure within the time interval that satisfies the paralleling conditions, and adjusting the speed and excitation controller output to achieve power adjustment. The present invention improves the accuracy and adaptability of paralleling predictions, increases the success rate of paralleling, reduces paralleling impact, optimizes power distribution, and enhances system stability and economy.

The invention relates to the technical field of electric energy storage, in particular to a flywheel excitation control system and method. The flywheel excitation control system comprises an upper computer which collects state data of a flywheel system in real time, monitors and analyzes the collected state data, generates an excitation current set value and a suspension weight set value, and sends the excitation current set value and the suspension weight set value to an excitation controller; and the excitation controller adjusts the current of the excitation coil according to the excitation current set value and the suspension weight set value to ensure that the suspension weight of the rotor is stabilized in a target range. The excitation current, the weight of the rotor and the voltage of the motor serve as feedback of a closed-loop system at the same time, the excitation current of the flywheel is adjusted, the suspension weight of the rotor is reduced, the voltage of the motor during discharging of the flywheel is stabilized, and the overall stability of the flywheel system is improved.

The invention discloses a control method and device of an excitation controller based on a time sequence prediction model and a medium, and relates to the technical field of power system automation control, and the method comprises the steps: obtaining the historical operation data of a motor during operation and the operation data at the current moment based on a preset time window; inputting the historical operation data into a pre-trained time sequence prediction model to obtain prediction data output by the time sequence prediction model; calculating a difference value between the operation data at the current moment and the prediction data, and adjusting a gain parameter of the excitation controller based on the difference value; and generating a control signal based on the adjusted gain parameter, and controlling the excitation voltage of the excitation controller by using the control signal. The problem that PID control in the prior art cannot meet the requirements of high precision and quick response of a power system is solved, the excitation controller is accurately and quickly controlled, and the requirements of the power system for high precision and quick response are met.

The present application relates to a kind of multifunctional coal cake rammer mechanism and its ramming method, belong to ramming equipment technical field, specifically including hammer rod and the ramming hammer plate installed in the bottom of hammer rod, hammer rod includes two I-beams, the bottom of two I-beams is fixed on ramming hammer plate, the top of two I-beams is fixed with upper fixed plate, a plurality of shock absorbers are installed between two I-beams, a plurality of vibrating rods are installed on shock absorber, upper fixed plate and ramming hammer plate are all provided with a plurality of vibrating rod holes, the bottom of vibrating rod is located in the vibrating rod hole of ramming hammer plate, the top of vibrating rod passes through the vibrating rod hole of upper fixed plate, and top is equipped with lifting control plate, lifting control plate is equipped with lifting mechanism, vibrating rod is connected with excitation controller by wire, the present application is simple in structure, stamping, extrusion and vibration are integrated, and the density of coal cake can be effectively provided.

The invention belongs to the technical field of electric power equipment, and discloses a synchronous motor system with high inertia and stable support regulation and control capability and a control method, and the system comprises a high-inertia synchronous motor, an excitation controller and a transformer. The high-inertia synchronous motor is used as a synchronous generator or a synchronous motor; the excitation controller is connected in series with a single-phase excitation winding of a rotor of the high-inertia synchronous motor and is used for outputting direct-current excitation current to the single-phase excitation winding so as to change the power angle of the synchronous motor, so that the power output by the high-inertia synchronous motor at a constant rotating speed under a power generation or electric working condition meets the requirements of a power grid, and stable support for the power grid is realized; by increasing the physical inertia of the synchronous motor and matching with reasonable regulation and control of rotor excitation, the long-term stable supporting capability of the synchronous motor is enhanced, so that constant frequency / constant voltage of the system can still be maintained when the system is disturbed or breaks down suddenly, the system is strived not to be unstable, not out of step and not to oscillate, and the reliability of the system is improved. And the transient stability supporting effect of the synchronous motor on the new energy power system is enhanced.

The utility model relates to the technical field of microcomputer excitation devices, in particular to a low-voltage unit microcomputer excitation device. The microcomputer excitation controller comprises a microcomputer excitation controller body, the back of the microcomputer excitation controller body is fixedly connected with a wiring end and a wire arrangement assembly, one side of the microcomputer excitation controller body is provided with an auxiliary installation assembly, and the wire arrangement assembly comprises an installation plate fixedly connected to the back of the microcomputer excitation controller body. A first arrangement block is fixedly connected to the front face of the mounting plate, a fixing column is fixedly connected to the front face of the first arrangement block, a protrusion is arranged on the arc face of the fixing column, and a second arrangement block is arranged on the front face of the first arrangement block. The wires are placed in the semicircular grooves in the first arrangement blocks on the mounting plate, then the second arrangement blocks are dragged to be clamped to the fixing columns, and therefore the wires are fixed, and the wires are arranged as far as possible.

The invention belongs to the technical field of aviation power system controller testing, and particularly relates to a starter generator system operation data and control parameter high-reliability recording method, in an excitation controller, a data acquisition system acquires analog quantity data of voltage and current; configuring the magnetoresistive random access memory to work in an SPI mode 0, executing a write enable command on the magnetoresistive random access memory, and setting a write enable latch bit; executing a write state register command on the magnetoresistive random access memory; in the FIFO mode, the analog quantity data loaded in the FIFO is sent and displayed by the shift register; and comparing the displayed data with the actual data, and when the displayed data is the same as the actual data, judging that the function of the controller is intact. According to the invention, a communication link can ensure high anti-interference capability and long-distance transmission reliability by utilizing differential transmission on a hardware level, and orderly sending and receiving of data are realized through a serial communication protocol on a software level.

This utility model provides a microcomputer excitation device with current regulation function, belonging to the technical field of microcomputer excitation devices. The utility model includes an excitation controller body. Heat dissipation holes are evenly distributed on both sides of the outer surface of the excitation controller body. A terminal block is fixedly mounted on one side of the excitation controller body by screws. Several terminals are evenly distributed on one side of the terminal block. Fixing devices are provided on the sides of two terminal blocks that are far apart. This utility model uses a pressure plate and a base plate to compress and fix the circuit, so that when the circuit is subjected to external force, the connection between the circuit and the pressure plate and the base plate is subjected to tension first, and only then is the connection between the circuit and the terminal subjected to tension. This reduces the fixing pressure of the screws on the circuit, helps prevent the circuit from detaching from the terminal under external force, and protects the connection between the circuit and the terminal, facilitating the normal operation of the microcomputer excitation device.

The invention discloses a pome internal quality detection device and method based on non-contact instantaneous air jet excitation and laser Doppler vibration measurement, and relates to the technical field of pome internal quality detection. Wherein the internal quality comprises but is not limited to hardness, SSC and internal defects; the invention discloses a pome internal quality detection device based on non-contact instantaneous air jet excitation and laser Doppler vibration measurement. The pome internal quality detection device comprises a pome conveying system, a pome placement module, an air jet impact excitation system, a laser Doppler vibration measurement system, an air jet impact excitation controller and air jet control and signal analysis software, air jet impacts and excites a pome sample, a laser Doppler vibration meter senses pome vibration response signals, the obtained signals are processed, and then a deep learning model is established for judgment. By means of the mode, the device can rapidly and accurately detect the internal quality of the pear fruits in a non-contact mode, and has great significance in improving the commodity rate and market competitiveness of the pear fruits and promoting rapid and healthy development of the pear fruit industry.

This invention relates to the field of control technology for variable modal systems, specifically an online data-driven rolling optimization control method and system. To address the shortcomings of existing data-driven variable modal system control algorithms, which presuppose sufficient offline data collection for each mode, neglecting the unknown new modes that may arise during the online operation of the actual variable modal system and lacking constraint considerations, this invention addresses these issues. Key technical points include: real-time capture of system dynamic changes and corresponding updates to the optimization control law; an online hybrid sampling excitation strategy; and the construction of a semidefinite programming problem that allows for online design of a slow excitation controller using rapidly sampled data. By introducing the hybrid sampling excitation strategy, this invention effectively shortens the open-loop excitation time after the generation of a new mode. Furthermore, this invention considers the unknown new modes and corresponding constraints that may arise during the online operation of the actual variable modal system. The control method effectively ensures the continuous solvability of the optimization control and the asymptotic stability of the closed-loop system. By online excitation of unknown switching modes to update the optimization control law in real time, this invention achieves a more widely applicable rolling optimization control method for variable modal systems.