scholarly journals Control methods for PWM rectifier cooperating with variable speed PM generator

2013 ◽  
Vol 23 (4) ◽  
pp. 495-504
Author(s):  
Witold Mazgaj ◽  
Zbigniew Szular ◽  
Tomasz Węgiel
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Synchronous Generator ◽  
Variable Speed ◽  
Pwm Rectifier ◽  
Higher Harmonics ◽  
Small Water ◽  
Water Turbine ◽  
Pwm Rectifiers ◽  
Generator Currents

Abstract The paper deals with cooperation between pulse width modulation (PWM) rectifier and variable speed synchronous generator which is applied especially in small water or wind plants. In such applications, the synchronous generator, which is usually permanent magnet (PM) generator, rotates at a variable speed which depends on water or wind energy. Therefore, this energy should be converted to the parameters of the three-phase power grid with the use of a power electronic unit. The main aim of the control strategy is to transfer a maximum possible amount of energy produced by the water turbine or the wind turbine connected to a synchronous generator. The second purpose of the control method is to decrease the amount of higher harmonics of generator currents. The paper describes two basic methods which are used in control systems of the PWM rectifiers. The first one is the sinusoidal PWM method, and the second method relates to the hysteresis switching of the PWM rectifier transistors. A significant part of the paper is devoted to control principles of the PWM rectifier which cooperates with a variable speed PM synchronous generator. Special attention is paid to higher harmonics of PM generator currents with respect to individual methods.

scholarly journals Implementation on the dSPACE 1104 of VOC-SVM based anti-windup PI Controller of a three-phase PWM rectifier

2021 ◽  
Vol 12 (3) ◽  
pp. 1586
Author(s):  
J. Lamterkati ◽  
L. Ouboubker ◽  
M. Khafallah ◽  
A. El afia
Keyword(s):  
High Performance ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Stable State ◽  
Switching Frequency ◽  
Pwm Rectifier ◽  
External Loop ◽  
Three Phase ◽  
Dspace 1104 ◽  
Controller Board

<p><span>The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between stationary (α-β) and and synchronously rotating (d-q) coordinate system, it is based on two cascaded control loops so that a fast inner loop controls the grid current and an external loop DC-link voltage, while the DC-bus voltage is maintained at the desired level and ansured the unity power factor operation. So, the stable state performance and robustness against the load’s disturbance of PWM rectifiers are boths improved. The proposed scheme has been implemented and simulated in MATLAB/Simulink environment. The control system of the VOC-SVM strategy has been built based on dSPACE system with DS1104 controller board. The results obtained show the validity of the model and its control method. Compared with the conventional SPWM method, the VOC-SVM ensures high performance and fast transient response.</span></p>

scholarly journals Model Predictive Virtual Synchronous Control of Permanent Magnet Synchronous Generator-Based Wind Power System

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5022 ◽  
Author(s):  
Yusheng Sun ◽  
Yaqian Zhao ◽  
Zhifeng Dou ◽  
Yanyan Li ◽  
Leilei Guo
Keyword(s):  
Power System ◽  
Wind Power ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Power Grid ◽  
Reducing Power ◽  
Synchronous Generator ◽  
Current Loop ◽  
Loop Control ◽  
Wind Power System

As much wind power is integrated into the power grid through power electronic equipment, the use of wind power is increased rapidly. Wind power system makes the power grid lack inertia and damping, thereby reducing power grid stability; in severe cases, it may even be disconnected. virtual synchronous generator (VSG) has been put forward to enhance the anti-disturbance performance of power grid. However, conventional VSG adopts an outer power loop and inner-current loop control. The inner-current loop control needs a pulse width modulation (PWM) module and proportion integration (PI) parameter settings. In order to reduce the parameter settings and simplify control structures, in this study, model predictive control (MPC) is used instead of inner-current loop control. At the same time—for the overall stability and control flexibility of the back-to-back system—we further propose to use outer-voltage loop control (OVLC) and MPC to stabilize direct current (DC) voltage on the machine-side and to employ model predictive virtual synchronous controls to provide inertia and damping for the power grid. The proposed control method was simulated in Matlab/Simulink (MathWorks, Massachusetts, MA, 2016) and verified by experimental results.

Research on a Nonlinear Control Strategy for Three-Phase Voltage Sources PWM Rectifier with Resistive and Inductive Load

2013 ◽  
Vol 860-863 ◽  
pp. 2385-2389
Author(s):  
Xian Qin Ma ◽  
Jiu He Wang ◽  
Ting Ting Dong
Keyword(s):  
Control Strategy ◽  
Disturbance Rejection ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Inductive Load ◽  
Three Phase ◽  
Passivity Based Control

The mathematical model of three-phase voltage sources Pulse Width Modulation (PWM) rectifier is nonlinear, in view of the traditional linear control strategys weak disturbance-rejection ability with resistive and inductive load, a new passivity-based control strategy was proposed according to passivity-based control theory. Energy shaping method based on PCHD (Port Control Hamiltonian with Dissipation) model and the IDA-PBC (Interconnection and Damping Assignment Passivity Based Control) control algorithm is adopted to design passivity-based controller, which is able to make the energy function have the minimum value when rectifier is at the desired point, thus improving the stability and the load disturbance-rejection ability. Simulation results show that passivity-based control method can make this system possess the high-performance of robustness and dynamic.

scholarly journals A new pulsating power elimination method based on ANFIS and PR control structures applicable for single-phase PWM rectifiers

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Hamid Rezaie ◽  
Alireza Khoshsaadat ◽  
Javad Shokrollahi Moghani ◽  
Hassan Rastegar
Keyword(s):  
Control System ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Fuzzy Inference ◽  
Control Method ◽  
Learning Algorithm ◽  
Back Propagation ◽  
Input Power ◽  
Inference System ◽  
Pwm Rectifiers

In the input power of single-phase Pulse Width Modulation (PWM) rectifiers there is a pulsating portion with twice the grid frequency. To prevent the transferring of pulsating power to the DC side, it should be filtered properly. A convenient method is to install a high-capacitance capacitor at the DC side which cannot be an appropriate solution due to its undesirable characteristics. This paper proposes an active method for eliminating the pulsating power in which the control system is based on Adaptive Network-based Fuzzy Inference System (ANFIS) architecture. To improve the controller performance, an online supervisory learning algorithm based on the Error Back Propagation (EBP) learning method is employed. This approach leads to a control system with minimal structure, enhanced accuracy and improved dynamics. Also, a Proportional Resonant (PR) controller is proposed and the results of two controllers are compared with each other and with one of the most outstanding previous works. Moreover, a superseded control method based on ANFIS architecture for the conventional control system of single-phase PWM rectifiers is suggested. The proposed methods’ efficiency are confirmed by extensive simulations in MATLAB/Simulink.

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