8 results about "Integral coefficient" patented technology

The application provides a double-fed variable-speed pumped storage unit cooperative control method based on a fuzzy PID, and belongs to the field of pumped storage unit control methods.The method comprises the following steps: S1, obtaining an error and an error change rate in a pumped storage unit; S2, inputting the error and the error change rate into a designed fuzzy controller to output a proportional coefficient increment and an integral coefficient increment; S3, combining an original proportional coefficient quantity and an original integral coefficient quantity of the pumped storage unit to output updated control parameters; S4, obtaining an actual water head and a theoretical water head of the pumped storage unit, dynamically adjusting a proportional coefficient gain coefficient and an integral coefficient gain quantity, and combining the updated proportional coefficient quantity of the pumped storage unit and the updated integral coefficient quantity of the pumped storage unit to jointly input into a PID controller; and S5, outputting an opening degree signal by the PID controller to an actuating mechanism, so that the actuating mechanism controls the opening degree of the variable-speed pumped storage unit.The method has high adaptability.

The application discloses a new energy grid-connected inverter adaptive transient synchronous stability control method under power grid asymmetric fault. During the power grid asymmetric fault, the system adaptively adjusts the proportional coefficient and integral coefficient of the positive sequence or negative sequence phase-locked loop to change the positive and negative sequence phase-locked loop output angular frequency when the additional controller is used during the fault duration, so that the positive and negative sequence phase-locked loop output angular frequency deviation is 0 during the fault duration, thereby realizing the transient synchronous stability control of the new energy grid-connected inverter under the power grid asymmetric fault. On the basis of not adding an additional control device, according to the fault information of the system, by improving the control structure of the positive and negative sequence phase-locked loop of the new energy grid-connected inverter, the transient synchronous stability of the new energy grid-connected inverter during the power grid asymmetric short-circuit fault can be obviously improved, and the risk of transient synchronous instability of the system is reduced.

The application discloses an intelligent PID control method for the temperature of a reaction kettle, and comprises the following steps: constructing a reaction kettle temperature model, and adopting a first-order inertia plus delay to describe the dynamic characteristics of the reaction kettle temperature; constructing a Kalman filter PID control model based on an improved RBF neural network; performing normalization processing on the deviation value of the target temperature of the reaction kettle and the real-time temperature; inputting the normalized temperature deviation value into the Kalman filter PID control model, outputting a temperature control signal to an adjusting valve, and adjusting the temperature of the reaction kettle. The improved RBF neural network algorithm is used to intelligently set the PID control parameters, and the Kalman filter is introduced, so that the temperature system can still realize fast response under the environment of nonlinearity, large lag and disturbance. Through real-time dynamic adjustment of the proportional coefficient, the integral coefficient and the differential coefficient, overshoot is inhibited, the steady-state error is reduced, and the system stable time is accelerated.

The application discloses a kind of equivalent proportional integral coefficient self-adaptive control method and system of phase-locked loop controller, belong to new energy power system transient stability control field, method includes: the angle of detection new energy equipment grid-connected port, angular frequency and angular acceleration, wherein, new energy equipment and phase-locked loop controller are located in same new power system;According to angle, angular frequency, angular acceleration, preset coefficient and preset amplitude limiting value, proportional multiplication coefficient and integral multiplication coefficient are calculated;Proportional multiplication coefficient is multiplied by the inherent proportional coefficient of phase-locked loop controller, integral multiplication coefficient is multiplied by the inherent integral coefficient of phase-locked loop controller, to obtain equivalent proportional coefficient and equivalent integral coefficient, for phase-locked loop control.It can improve the transient stability maintenance capability of new energy equipment under serious fault condition, introduce multiplication link on existing structure, easy to realize.

This application provides a motor control method, device, medium, and product, relating to the field of audio noise reduction technology. The motor control method includes: responding to a drive command, acquiring current stage information, including any one of a start-up stage, a normal stage, and an end stage; if the stage information is determined to meet preset conditions, adjusting the parameters of a PID algorithm according to the stage information to drive the DC motor to move, the parameters including at least one of a proportional coefficient, an integral coefficient, and a derivative coefficient, and the preset conditions including the stage information being either the start-up stage or the end stage of target object movement. The embodiments of this application can achieve variable speed movement of the DC motor, with good control effect. Furthermore, by adjusting the algorithm parameters during the start-up and end stages of target object movement, overshoot and jitter phenomena can be effectively eliminated, and oscillation and high operating noise are less likely to occur, resulting in excellent control performance.

This invention provides a method for determining the harmonic stability of a vehicle-grid coupling system with in-phase traction power supply, belonging to the technical field of vehicle-grid coupling systems. This invention inputs 18-dimensional operating parameters into an artificial intelligence physical constraint sequence impedance estimation model, outputting a sequence impedance matrix covering the port characteristics of both the on-board converter and the grid-side converter. Based on the number of retained frequency coupling terms, available video memory, and the total number of CUDA currents, resource allocation coefficients are calculated and dynamically adjusted. A complete vehicle-grid coupling system impedance model is constructed by integrating the sequence impedance matrices from both sides. The stability margin is evaluated using the generalized Nyquist criterion. After comparing the stability margin with a preset threshold, the proportional-integral coefficient of the current inner loop is adaptively adjusted and iterated cyclically. This solves the technical problem of inaccurate stability judgment caused by excessive computational complexity in constructing the sequence impedance matrix and the lack of physical constraints in the harmonic stability analysis of a vehicle-grid coupling system with in-phase traction power supply.

This invention relates to an integral optimal control method and system for ship adaptive rudder track holding, belonging to the field of ship adaptive rudder track control technology. It is proposed to address the problems of low track tracking accuracy and poor performance in indirect track control, as well as yaw issues encountered by wind, waves, and currents during straight track tracking. Key technical points: Based on the ship's speed u0 and the target heading deviation ψ... r Update system matrix A; select accuracy and energy consumption balance parameter matrices, solve the ILQR Riccati equation to obtain the optimal control variance matrix; calculate the ILQR controller proportional differential coefficient matrix, and calculate the integral coefficient matrix according to the critical damping principle; set the noise variance matrix, solve the GESO Riccati equation to obtain the observation equation matrix; calculate the GESO observation gain, and calculate the observation integral gain matrix according to the critical damping principle; calculate the GESO state observation result x and the ILQG control law; repeat the above steps to control the ship to travel along the set straight track. This invention can effectively solve the yaw problem encountered by wind, waves and current interference when tracking a straight track, making the closed-loop system have good robust stability, while reducing the number of steering operations per unit time and reducing steering energy consumption; after extensive testing, it has advanced performance.

This invention proposes a smart grid voltage control method based on predictive fractional-order reinforcement learning. This method utilizes a bidirectional gated recurrent unit to perform bidirectional prediction of time series data and considers multidimensional information, enabling more accurate prediction of future grid voltage and thus achieving more precise control. The method employs a convolutional neural network to extract features from the image formed by the predicted signal. The two extracted features are used as the proportional and integral coefficients of the fractional-order proportional-integral-derivative (FID) controller, resulting in higher control precision and greater flexibility. Furthermore, this method combines the FID controller with a state-action-reward-state-action reinforcement learning approach, optimizing control commands, improving the accuracy of grid voltage control, reducing voltage deviation, stabilizing voltage levels, and enhancing the stability of the power system.