Digital controller design for PV inverter with model based technique

In this paper, an experimental procedure used efficiently and successfully for teaching in practical classes of digital control course for undergraduate students who are attending the fifth year in Industrial Electrical Engineering at Federal Institute of Education, Sciences and Technology, in Brazil, is presented. The adopted methodology is characterized by the following steps: modeling of the dynamic system to be controlled from experimental data, model-based digital controller design according to pre-established performance specifications and implementation of the designed digital controller. The experiments are performed on a data acquisition platform, in real time, based on high performance virtual/electronics instrumentation, at Laboratory of Computational Intelligence Applied to Technology. Results from an experimental activity, developed by students in the digital control course, illustrate the main practical aspects that must be taken into account in design and implementation of real time digital PI/PID control.

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A novel current controller design for grid-integrated PV inverter system

SN Applied Sciences ◽

10.1007/s42452-021-04290-4 ◽

2021 ◽

Vol 3 (3) ◽

Author(s):

Ayaz Ahmad ◽

L. Rajaji ◽

A. Iqbal

Keyword(s):

Controller Design ◽

Vital Role ◽

Current Feedback ◽

Lcl Filter ◽

Design Algorithm ◽

Grid Voltage ◽

Pv Inverter ◽

Current Controller ◽

Experimental Implementation ◽

Grid Connected Inverter

AbstractDistributed generators are playing a vital role in supporting the grid in ever-increasing energy demands. Grid code regulation must be followed when integrating the photovoltaic inverter system to the grid. The paper investigates and analyzes a controller model for grid-connected PV inverters to inject sinusoidal current to the grid with minimum distortion. To achieve better tracking and disturbance rejection, a DSP-based current controller is designed with LCL filter. The controller gets the current feedback from the grid, compares it with reference current, and calculates duty cycle to generate PWM pulses to trigger H-bridge converters. The grid voltage is loaded to the initial value in proposed PR controller to ensure the initial inverter voltage to match the grid voltage. The paper presents a novel current controller algorithm for grid-connected inverter system, and simulation is done. A detailed analysis has been carried out to validate the proposed design algorithm. Experimental implementation of the current controller in the DC/AC converter circuits with an LCL filter is done for 5.4 kW to validate and match the simulation model.

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Towards Automatic Model Based Controller Design for Reconfigurable Plants

IFAC Proceedings Volumes ◽

10.3182/20080706-5-kr-1001.00058 ◽

2008 ◽

Vol 41 (2) ◽

pp. 342-346 ◽

Cited By ~ 2

Author(s):

Axel G. Michelsen ◽

Roozbeh Izadi-Zamanabadi ◽

Jakob Stoustrup

Keyword(s):

Controller Design ◽

Model Based

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Single and three phase moving average filter PLLs: Digital controller design recipe

Electric Power Systems Research ◽

10.1016/j.epsr.2014.06.019 ◽

2014 ◽

Vol 116 ◽

pp. 276-283 ◽

Cited By ~ 5

Author(s):

Naji Rajai Nasri Ama ◽

Wilson Komatsu ◽

Lourenco Matakas Junior

Keyword(s):

Controller Design ◽

Moving Average ◽

Digital Controller ◽

Moving Average Filter ◽

Three Phase ◽

Average Filter

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Digital Controller Design for Half-Car Active Suspension System with Using Singular Perturbation Theory

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.403-408.4800 ◽

2011 ◽

Vol 403-408 ◽

pp. 4800-4805 ◽

Cited By ~ 1

Author(s):

A. R. Paarya ◽

H. Zarabadipour

Keyword(s):

Perturbation Theory ◽

Controller Design ◽

Suspension System ◽

Digital Controller ◽

Singular Perturbation Theory ◽

Vehicle Suspension ◽

Car Model ◽

Perturbed Systems ◽

Simulation Results ◽

Vehicle Suspension System

In this paper the digital controller design for vehicle suspension system, based on a half-car model using singular perturbed systems is considered. This strategy is based on the slow and fast subsystems controller design. The simulation results show them favorable performance of the controller and achieve fast and good response.

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Control-oriented modeling for the electrodynamic levitation with permanent magnet Halbach array

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-210007 ◽

2021 ◽

pp. 1-19

Author(s):

Yongpan Hu ◽

Zhiqiang Long ◽

Yunsong Xu ◽

Zhiqiang Wang

Keyword(s):

Permanent Magnet ◽

Controller Design ◽

Levitation Force ◽

Model Based ◽

Halbach Array ◽

Validation Experiment ◽

Electromagnetic Models ◽

Two Stages ◽

Poor Stability ◽

Maximum Minimum

Poor stability of the permanent magnet electrodynamic levitation hinders its application in the maglev field. Therefore, building a control-oriented model to improve its stability is most challenging. However, intractable electromagnetic models leading to an implicit relationship between levitation force and gap, yields a barrier for model-based controller design. To solve the above-mentioned problem, this paper develops a control-oriented model by two stages. Specifically, the first stage is to show an explicit formula of the levitation force with regard to the levitation gap by neglecting end effect; meanwhile the “maximum–minimum rectification” method is put forward to evaluating an accurate levitation force. The second stage is to bring forth the control-oriented model on basis of the estimated levitation force. Although the paper focus mainly on the development of the control-oriented model, an example of PD controller is provided to verify its validation. Experiment results demonstrate the estimated levitation force is highly consistent with the real one. Simulation results show that the control-oriented model is sufficiently reliable. The research bridges the gap between the physical model and the model-based controller for the electrodynamic levitation with permanent magnet Halbach array.

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