This study presents an adaptivedifferentialevolution (DE) algorithm to allocate the thyristor-controlled series compensator (TCSC) incorporated with the reactive power management problem. In addition, a dynamic upda...
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This study presents an adaptivedifferentialevolution (DE) algorithm to allocate the thyristor-controlled series compensator (TCSC) incorporated with the reactive power management problem. In addition, a dynamic updating is applied for scaling and penalty factors to enhance the performance of the multi-objective DE algorithm. During the selection of the best candidate lines for efficient allocation of TCSC devices, three situations are considered for excluded transmission lines. These situations are the lines connected between two generating units;lines connected through transformers and the lines of low losses. The considered multi-objective function compromises between reducing power losses, improving voltage profile, reducing reactive power losses, reducing TCSC cost and reducing number of flexible alternating current transmission systems units. The optimal siting and sizing of TCSC is defined for normal and emergency operating conditions. The proposed procedure is employed for IEEE 9-bus and IEEE 30-bus test systems in addition to western delta network as a real part of the Egyptian network. Four case studies are considered for each test system to represent normal and abnormal operating conditions. Results clearly indicate the effectiveness of the adaptive DE algorithm to allocate perfectly the TCSC to enhance the system performance.
An active disturbance rejection control(ADRC) technique based on adaptivedifferentialevolution(ADE) algorithm and an improved PID control strategy were proposed so as to solve the problem of self-balancing control a...
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ISBN:
(纸本)9781467397155
An active disturbance rejection control(ADRC) technique based on adaptivedifferentialevolution(ADE) algorithm and an improved PID control strategy were proposed so as to solve the problem of self-balancing control and steering control for two-wheeled self-balancing *** using Lagrange formula,the nonholonomic dynamic mathematical model was derived based on the nonholonomic dynamic Routh equation of generalized *** self-balancing control,an ADRC strategy whose parameters were adjusted by means of ADE algorithm was *** steering control,a PID control strategy combined with tracking differentiator(TD) was *** dynamic model of the whole robot was built through Adams software by applying virtual prototype ***,co-simulations using both Matlab/Simulink and Adams were carried *** co-simulation results showed that the supposed control strategy could achieve self-balancing and steering operation effectively with the performance of fast adjusting speed,high accuracy and strong robustness as well.
Production scheduling problems and traditional differentialevolution(DE) are analyzed in this paper. Taking the minimum of total completion time as the objective function of production scheduling, a production schedu...
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Production scheduling problems and traditional differentialevolution(DE) are analyzed in this paper. Taking the minimum of total completion time as the objective function of production scheduling, a production scheduling model is established for batch processes in process industry. Considering that the performance of the traditional DE algorithm is sensitive to the parameter settings, an adaptive control evolution strategy is used to control the parameter scale factor F and crossover probability CR to solve the problem of parameter settings. Taking a practical production problem as a scheduling example, the established model and adaptive DE algorithm are applied to implement the production scheduling simulation. The simulation results show that compared with the ant colony system(ACS) algorithm, the adaptive DE algorithm is effective and feasible.
Surge is an unstable operating mode of the centrifugal compressor that occurs at mass flows below the surge line, and it results in considerable loss of performance and efficiency of the compression system. Modelling ...
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ISBN:
(纸本)9781457715846
Surge is an unstable operating mode of the centrifugal compressor that occurs at mass flows below the surge line, and it results in considerable loss of performance and efficiency of the compression system. Modelling of the centrifugal compressor is the basis of getting the surge line and carrying out anti-surge control. Based on fluid mechanics, mass and energy conservation principles, the mechanism model of a CCPP gas system's multistage centrifugal compressor with three single-stage compressors in series is established. The parameter estimation problem of the model is transformed into an optimization problem, and an adaptive differential evolution algorithm is used to decide the unknown parameters in the model. Model validation results show that the model can describe pressure ratio's varying trend of the multistage compressor. It lays the foundation for calculating the surge line and is of certain value to compression system's anti-surge control.
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