Mathematical Modelling and Simulation of Simple Phase Locked Loop for Distributed Grid Application

2020 ◽  
Vol 17 (5) ◽  
pp. 2349-2353
Author(s):  
P. Venkatesh Kumar ◽  
S. Anbumalar ◽  
V. Yamini
Keyword(s):  
Simple Structure ◽  
Phase Locked Loop ◽  
Phase Detection ◽  
Robust Performance ◽  
Effective Performance ◽  
Simulation Results ◽  
Grid Application ◽  
Simple Phase ◽  
Mathematical Modelling And Simulation ◽  
Fast Dynamic

The purpose of this paper is to model a simple phase locked loop for grid application. One of the most challenging issues is the phase detection for grid application. The signal estimator with PLL is used for better phase detection which has a simple structure and gives fast dynamic response for grid application with robust performance. The simulation results show the effective performance of the proposed PLL.

scholarly journals Semidigital PLL Design for Low-Cost Low-Power Clock Generation

2011 ◽  
Vol 2011 ◽  
pp. 1-9
Author(s):  
Ni Xu ◽  
Woogeun Rhee ◽  
Zhihua Wang
Keyword(s):  
Low Power ◽  
Low Cost ◽  
Phase Locked Loop ◽  
Cmos Technology ◽  
Phase Detection ◽  
Linear Phase ◽  
Digital Converter ◽  
Clock Generation ◽  
Time To Digital Converter ◽  
Simulation Results

This paper describes recent semidigital architectures of the phase-locked loop (PLL) systems for low-cost low-power clock generation. With the absence of the time-to-digital converter (TDC), the semi-digital PLL (SDPLL) enables low-power linear phase detection and does not necessarily require advanced CMOS technology while maintaining a technology scalability feature. Two design examples in 0.18 μm CMOS and 65 nm CMOS are presented with hardware and simulation results, respectively.

Mixed H∞/H2 Output Feedback Stability Control for Dual-Motor Independent Drive Electric Vehicle

2013 ◽  
Vol 658 ◽  
pp. 602-608 ◽  
Author(s):  
Cheng Lin ◽  
Chun Lei Peng
Keyword(s):  
Electric Vehicle ◽  
Output Feedback ◽  
Stability Control ◽  
Vehicle Stability ◽  
Robust Performance ◽  
Output Feedback Controller ◽  
Vehicle Stability Control ◽  
Feedback Stability ◽  
Simulation Results ◽  
Yaw Moment

This paper presents the design of mixed H∞/H2Output Feedback Controller for Independent Drive Electric Vehicle Stability Control. It generates yaw moment by applying driving intervention at front Independent driving wheels according to the vehicle states. The performance of the proposed controller is evaluated through a series of simulations under different velocity and different mass. The simulation results show that the controller can help vehicle against a certain range of uncertainty (speeds and loads) and get excellent robust performance.

Fuzzy Control of Z-Source PV Grid-Connected Using Constant Frequency Hysteresis Comparison

2014 ◽  
Vol 852 ◽  
pp. 412-416 ◽  
Author(s):  
Yan Chen ◽  
Yong Zheng
Keyword(s):  
Fuzzy Control ◽  
High Efficiency ◽  
Filter Design ◽  
Control Performance ◽  
Tracking Accuracy ◽  
Constant Frequency ◽  
Simulation Results ◽  
Hysteresis Control ◽  
Pv Grid ◽  
Fast Dynamic

In order to achieve high efficiency of photovoltaic grid-connected system, the constant frequency hysteresis control is introduced into the Z-source grid-connected control, and realized by the fuzzy control technology. Because of the particularity of Z-source shoot-through working state, analyses shoot-through boosting characteristic of Z-source inverter and voltage control performance of DC-link, get the control signal of shoot-through vector. Add the shoot-through vector into hysteresis grid-connected control by using the logical analysis. This method has the advantages of fast dynamic response, high tracking accuracy and stability, and to overcome the traditional hysteresis control filter design is difficult. The simulation results prove the correctness of the theoretical analysis.

Stability and Resolution Analysis of a Phase-Locked Loop Natural Frequency Tracking System for MEMS Fatigue Testing

2002 ◽  
Vol 124 (4) ◽  
pp. 599-605 ◽  
Author(s):  
X. Sun ◽  
R. Horowitz ◽  
K. Komvopoulos
Keyword(s):  
Control System ◽  
Natural Frequency ◽  
Fatigue Testing ◽  
Tracking System ◽  
Nonlinear Dynamic System ◽  
Phase Locked Loop ◽  
Tracking Accuracy ◽  
Position Sensing ◽  
Spring Element ◽  
Simulation Results

An analysis of a nonlinear control system that was used to track the natural frequency of a MEMS resonator is presented in this paper. A phase-locked loop system is used to track the natural frequency of the resonator due to fatigue of the spring element. A model for the control system is established and the system behavior is analyzed using an averaging method. The analysis provides a quantitative criterion for selecting the control gain to achieve stability. Simulation results are shown to be in agreement with the theoretical analysis. Tracking accuracy under the presence of Brownian noise and capacitive position sensing noise is also analyzed by using a variance propagation equation for the nonlinear dynamic system utilizing a first-order Taylor series approximation. The theoretically estimated resolution is also found to be in good agreement with simulation results.

An Improved Switching Table for PMSM DTC Drive Used in Electrical Vehicle

2011 ◽  
Vol 97-98 ◽  
pp. 1091-1097
Author(s):  
Yan Jing Meng ◽  
Yao Hua Li ◽  
Meng Xiao Wang
Keyword(s):  
Torque Ripple ◽  
Good Choice ◽  
Control Performance ◽  
Electrical Vehicle ◽  
High Torque ◽  
Simulation Results ◽  
Control Configuration ◽  
Torque Ripples ◽  
Hysteresis Control ◽  
Fast Dynamic

The DTC for PMSM possesses many advantages: simple control configuration, lesser parameters dependence and fast dynamic response and is a good choice for the drive of EV. But the DTC suffers from high torque ripples. The switching table is used as the hysteresis control rule that determines the control performance. An improved switching table is proposed based on effects of voltage vectors on the drive. Simulation results show this switching table can suppress torque ripple compared to the conventional switching table.

Design of Multi-Mode PID Controller and Application in Time-Delay Process

2014 ◽  
Vol 511-512 ◽  
pp. 637-642
Author(s):  
Yu Mei Chen ◽  
Fei Tan ◽  
Tao Fan
Keyword(s):  
Time Delay ◽  
Transient Response ◽  
Intelligent Control ◽  
Pid Controller ◽  
Control Algorithm ◽  
Simple Structure ◽  
Excitation Control ◽  
New Type ◽  
Simulation Results ◽  
Multi Mode

Through brief analysis of characteristics of conventional control, a new type of multi-mode intelligent control algorithm based on error information is put forward. The algorithm consists of proportional acceleration control for rapidity of transient response, differential deceleration control for stationarity of transient response and steady state excitation control for accuracy of steady response. The control algorithm is applied to time-delay process, compared with other algorithms. Simulation results show its good performance with MATLAB language. The algorithm has simple structure, good generality and easy adjustment.

The Design of a MEMS Surface Resonant Magnetometer

2009 ◽  
Vol 60-61 ◽  
pp. 265-269
Author(s):  
Mu Zhi Hu ◽  
Zheng You ◽  
Jian Zhong Yang ◽  
Ling Qi Wu
Keyword(s):  
Mechanical Model ◽  
Sensitive Element ◽  
Simple Structure ◽  
Theoretical Calculations ◽  
High Sensitivity ◽  
Harmonic Excitation ◽  
First Order ◽  
Good Accordance ◽  
Simulation Results ◽  
The Magnetic Field

In this paper, a MEMS surface resonant magnetometer based on Lorentz force is presented. This magnetometer has three current carriers to sense the magnetic field and changes into deflection of beams which will be detected by the comb-capacitance. The alternating current carried by oscillate beams has the same frequency as resonant frequency of the magnetometer structure to make the deflection magnified Q (Quality-factor) times, therefore, it becomes more easily to measure. In this paper, the mechanical model of the sensitive element is established. The equations of stiffness of the system, deflection, first-order resonance frequency and sensitivity are setup and simulated in ANSYS, as well as second-order to fourth-order modal, and harmonic excitation response simulation. It can be seen that the simulation results are in good accordance with the theoretical calculations, which proves the feasibility and the rationality of the theoretical model. The dimensions of the structure are designed, as well as the processing sequence Anodic Silicon-Glass Bonding and Silicon DRIE Multi-user Bulk Micromachining Process which will be used to manufacture the magnetometer. The MEMS surface resonant magnetometer has a high sensitivity, simple structure and easy to manufacture. The prototype sensors are being manufactured in NEDI now.

Shock Response of Ship Section to Underwater Explosion With the Cavitation Effect

2014 ◽  
Author(s):  
Chen Ying-yu ◽  
Xiongliang Yao ◽  
Xiao Wei ◽  
Liu Xiang-dong
Keyword(s):  
Simple Structure ◽  
Underwater Explosion ◽  
Pulse Load ◽  
Wave Load ◽  
Ship Structure ◽  
Structure Response ◽  
Cavitation Effect ◽  
Shock Response ◽  
Simulation Results ◽  
Structural Arithmetic

Besides the shock wave load and the gas bubble pulse load, cavitation effect has a significant influence on the ships subjected to underwater explosion. The goal of this research is to investigate the cavitation effect on the response of ship section using acoustic-structural arithmetic. Comparison between the structure response considering the cavitation effect and not, the formation mechanism of cavitation zone are discussed. The simulation results show acoustic-structural arithmetic can be used to numerical simulate the dynamic response of simple structure and ship section subjected to underwater explosion with the consideration of cavitation effect. And it also can be used to capture the cavitation in the water. Meanwhile, the simulation results show that cavitation zone generated by underwater explosion is very large, and the reloading effect is obvious with the consideration of cavitation effect. The vibration of the ship structure is more severe with the reloading, and thus more serious damage occurs as the result of the prolonged loading time.

Sign in / Sign up

Export Citation Format

Share Document