MODELING OF THERMAL SYSTEM UNDER PI CONTROLLER WITH PWM OUTPUT

2020 ◽  
Author(s):  
DAVID AUGUSTO RIBEIRO ◽  
DENNIS SANTOS TAVARES ◽  
JULIANO COELHO PEREIRA ◽  
DIEGO CARDOSO FUZATTO ◽  
PABLO HENRIQUE MACHADO DE SOUZA ◽  
...  
Keyword(s):  
Pulse Width Modulation ◽  
Pi Controller ◽  
Temperature Curve ◽  
Thermal System ◽  
Thermal Systems ◽  
General Plan ◽  
Representative Model ◽  
Soldering Iron ◽  
Non Linear Systems ◽  
Key Aspects

The present work focuses on the modeling of the thermal system composed of several modules, in which the general model of the system is built, which includes all its components in operation. The environment collected data in real time of the growth and decrease (temperature) curve of a soldering iron tool, under aspects of PWM variation - Pulse Width Modulation - of the signal. It is used as a representative model of device in industrial welding, in which it has similarities in key aspects of behavior. Through analysis and software assistance, the function of transferring the general plan was obtained, which showed an acceptable level of correspondence (86.04%) in non-linear systems. Based on the model discovered, a PItype controller - Proportional Integral - was designed, paying attention to the need for a low-level overshoot signal (6.08%) in order to obtain a response to the rapid stabilization step, rare in thermal systems. The PI was developed in order to generate an output in DC format (Duty Cycle format), since the raw data of the system were collected by varying this indicator at regular intervals of time. After the tests carried out in simulation, results were obtained that confirm that the developed control system is applicable and responds appropriately, being able to be optimized for applications.,

scholarly journals Adaptive Fuzzy PI Current Control of Grid Interact PV Inverter

2018 ◽  
Vol 8 (1) ◽  
pp. 472 ◽  
Author(s):  
R.S. Ravi Sankar ◽  
S.V. Jayaram Kumar ◽  
G. Mohan Rao
Keyword(s):  
Power Generation ◽  
Pulse Width Modulation ◽  
Fuzzy Controller ◽  
Pi Controller ◽  
Current Control ◽  
Reference Voltage ◽  
Voltage Source ◽  
Pv Inverter ◽  
Photo Voltaic ◽  
Pv Power Generation

Now a day‟s, Photo Voltaic (PV) power generation rapidly increasing. This power generation highly depending on the temperature and irradiation. When this power interface with grid through the voltage source inverter with PI controller. Its gains should be updated due to the parametric changes for the better performance. In This Work Fuzzy Controller updates the gains of the proportional integral (PI)s Controller under variable parametric conditions. the gaines of the PI Controller are updated based on the error current and change in error current through the fuzzy controller. The error current in direct and quadrature frame are the Inputs to the PI controller. The PI Controller generates the reference voltage to the pulse width modulation technique. Here reference voltage is compared with the carrier signal to generate the pulses to the 3-Ph Inverter connected to the grid. This controller has given well dynamic response with less steady state error and also given The less THD of the grid current compared to the PI and Fuzzy controller.It Is implemented and verified in MATLAB Simulink.

Direct Torque Control of Bearingless Induction Motor Using Space Vector Pulse Width Modulation Based on Fuzzy Adaptive Control

2011 ◽  
Vol 383-390 ◽  
pp. 7321-7327
Author(s):  
Luo Fei Wan ◽  
Xian Xing Liu ◽  
Zheng Qi Wang ◽  
Jin Wei Zhou
Keyword(s):  
Adaptive Control ◽  
Induction Motor ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Adaptive Controller ◽  
Pi Controller ◽  
Space Vector ◽  
Fuzzy Adaptive Control ◽  
Fuzzy Adaptive Controller ◽  
Fuzzy Adaptive

This paper presents a new strategy of direct torque controller for bearingless induction motor using space vector pulse width modulation based on fuzzy adaptive control. when we use direct torque controller using space vector pulse width modulation to take decoupling, the parameters of PI controller which generating the reference voltage vector in conventional SVM-DTC are difficult to determine the dynamic operation. In order to improve away the disadvantages of conventional SVM-DTC system, flux and torque fuzzy adaptive controller were designed to substitute the original flux and torque PI controller in the controlling for bearingless induction motor using space vector pulse width modulation. With the fuzzy algorithm, it is easy to obtain the control voltage component of the flux and torque respectively. Two voltage vectors achieve real-time adjustment and solve the disturbance problems in torque loop and flux loop. In this paper, the design process of the fuzzy adaptive controller is given. Use Matlab/Simulink to check the improved and traditional SVM-DTC method. The results show that the improved algorithms have a better performance in reducing the ripple of torque, flux and Rotor displacement when compared with the tradition DTC method. And it also improves the system dynamic performance.

An Update of the Virtual Energy Laboratory

2000 ◽  
Author(s):  
H. Perez-Blanco ◽  
Paul Albright
Keyword(s):  
System Design ◽  
Conceptual Design ◽  
Large Scale ◽  
Thermal System ◽  
Exergetic Efficiency ◽  
Thermal Systems ◽  
Large Scale Systems ◽  
Conceptual Designs

The Virtual Energy Lab (VEL) is a PC based didactic tool for use in conjunction with courses on technical thermodynamics and thermal system design. The tool can also be used for conceptual design of large-scale systems incorporating cogeneration schemes of varied types. The user can learn how to combine conventional thermal systems in creative ways to enhance exergetic efficiency. In the present work, we describe upgrades to this tool, and we present several examples to show the possibilities of energy cascading. The features of ease of learning, user ability to specify important parameters and ready targeting of conceptual designs were preserved in the updated version.

scholarly journals Design and Control of a Grid-connected Seven Level Inverter for Photovoltaic Applications

2019 ◽  
Vol 3 (1) ◽  
pp. 21-27
Author(s):  
Francis Mulolani ◽  
Francis Kafata ◽  
Esau Zulu
Keyword(s):  
Closed Loop ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Pi Controller ◽  
Current Control ◽  
International Standards ◽  
Control Technique ◽  
Loop Current ◽  
Grid Synchronization ◽  
Synchronous Reference Frame

This paper presents the design and closed-loop current control of a grid connected seven-level, 3-phase diode-clamped multilevel inverter for Photovoltaic (PV) applications. The proposed closed loop current control technique is based on the voltage-oriented proportional integral (PI) controller theory. The modulation technique used is level-shifted-carrier sinusoidal pulse width modulation (SPWM). The gain values of PI controller were selected to achieve good current quality and dynamic response. Grid synchronization was achieved by using a synchronous-reference frame phase-locked loop (SRF-PLL). Matlab/Simulink was used for the control system design and simulation. The simulation results show that a 1.34% total harmonic distortion (THD) of the output current was achieved which is within the allowable current distortion limits by international standards. The stability of the system was analyzed using pole-zero mapping and root locus.

scholarly journals Design and Simulation of Closed Loop Proportional Integral (PI) Controlled Boost Converter and 3-phase Inverter for Photovoltaic (PV) Applications

2019 ◽  
Vol 15 (1) ◽  
pp. 10-22
Author(s):  
Riadh Adnan Kadhim
Keyword(s):  
Closed Loop ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Pi Controller ◽  
Boost Converter ◽  
Solar Panel ◽  
Current Output ◽  
Phase Inverter ◽  
Proportional Integral ◽  
Mathematical Equations

This research deals with the design and simulation of a solar power system consisting of a KC200GT solar panel, a closed loop boost converter and a three phase inverter by using Matlab / Simulink. The mathematical equations of the solar panel design are presented. The electrical characteristics of the panel are tested at the values ​​of 1000  for light radiation and 25 °C for temperature environment. The Proportional Integral (PI) controller is connected   as feedback with the Boost converter to obtain a stable output voltage by reducing the oscillations in the voltage to charge a battery connected to the output of the converter. Two methods (Particle Swarm Optimization (PSO) and Zeigler- Nichols) are used for tuning PI controller to enhance the overall performance of the system. The Sine Pulse Width Modulation (SPWM) technique was used to obtain a pure 3-phase in low distortion.  The voltage and current output values ​​of ± 14V and ± 2.8A are obtained, and the Total Harmonic Distortion (THD) value is 4.20%.

MODELING AND ANALYSIS OF THREE-PHASE SPACE VECTOR PULSE WIDTH MODULATION BASED RECTIFIERS USING FUZZY-PI CONTROLLER

2015 ◽  
Vol 2 (3) ◽  
pp. 75-75 ◽  
Author(s):  
Mustafa ŞEKKELİ ◽  
Yazar Adı Yazar Soyadı ◽  
Hakan AÇIKGÖZ ◽  
Ö.Fatih KEÇECİOĞLU ◽  
Ahmet GANİ
Keyword(s):  
Phase Space ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Pi Controller ◽  
Space Vector ◽  
Modeling And Analysis ◽  
Three Phase ◽  
Fuzzy Pi Controller

A New Approach to the Simulation of Thermal Systems

2005 ◽  
Vol 128 (3) ◽  
pp. 161-167 ◽  
Author(s):  
Nedim Sözbir
Keyword(s):  
Linear System ◽  
Linear Equations ◽  
Taylor Series Expansion ◽  
Equation System ◽  
Thermal System ◽  
Thermal Systems ◽  
Suggested Approach ◽  
New Approach ◽  
Linear System Of Equations ◽  
System Equations

In this paper, thermal systems are simulated and analyzed with a new approach. Thermal system design equations can be obtained as a nonlinear algebraic equation system and then this nonlinear equation system is converted to a well-defined or non-well-defined linear equation system. The transformation of the nonlinear system equations to linear system equations is realized by using the first-order Taylor series expansion; after that, the linear system of equations of our thermal system is obtained. These linear equations are then solved by our new suggested approach. This new algorithm and conventional solution methods are applied for designing some thermal systems, such as the heat exchangers combination and the gas turbine plant using design calculations. Obtained conventional and new approach results for those samples of thermal systems are compared and interpreted.

Performance assessment of novel photovoltaic thermal system using nanoparticle in phase change material

2019 ◽  
Vol 29 (4) ◽  
pp. 1490-1505 ◽  
Author(s):  
Alper Ergün ◽  
Hilal Eyinç
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Paraffin Wax ◽  
Thermal System ◽  
Thermal Systems ◽  
Content Type ◽  
Pv Panel ◽  
Photovoltaic Thermal System ◽  
Energy And Exergy Analysis ◽  
Change Material

Purpose Nanotechnology has developed gradually in recent years and it is encountered in various applications. It has many usage area especially in energy systems. The purpose of this study, in a photovoltaic thermal system, thermal behaviours of a PV panel has been investigated by energy and exergy analysis method using a phase change material inserted 5 per cent weighted Al2O3 nanoparticle. Design/methodology/approach In this study, one of the three different PV panels was kept normally, the other one was filled with a phase changing material (paraffin-wax) and the last panel was filled with the mixture of a nanoparticle and paraffin-wax. Findings After the analyses, especially during the time intervals when the radiation is high, it is found that the panel with Np-paraffin mixture has a high electrical and thermal efficiency. In addition, as a result of the exergy analyses, average exergy efficiency of the panel with Np-paraffin mixture has been determined as 10 per cent, whereas that of the panel with paraffin as 9.2 per cent. Originality/value Nanoparticles had not been used with PCMs in photovoltaic–thermal systems in the studies made before.

Comparison of Polysun Simulation with Direct Measurements of Solar Thermal System in Rapotice

2014 ◽  
Vol 1041 ◽  
pp. 158-161
Author(s):  
Petr Jelínek ◽  
Jiří Sedlák ◽  
Barbora Lišková
Keyword(s):  
Computer Simulation ◽  
Computer Simulations ◽  
Systems Design ◽  
Solar Thermal ◽  
Thermal System ◽  
Thermal Systems ◽  
Passive House ◽  
Direct Measurements ◽  
Solar Thermal System

Design of small solar thermal systems used in family houses is currently commonly based only on experience of designers who rely on a few basic rules. But these sophisticated systems’ design should be tailor-made according to the needs and habits of the users, because their behavior has great impact on the systems’ efficiency. This is why we should use computer simulations – to design the most appropriate option that would fulfill the needs of the users. In this paper we compare computer simulation (using Polysun - Designer software) of a small solar thermal system installed on a passive house in Rapotice with in-situ measurements. From this comparison we make conclusions applicable for design of similar systems.

scholarly journals Performance Analysis of Boost Converter for Constant Voltage Applications Under the Variation of Closed-Loop PI Controller Parameters

2017 ◽  
Vol 16 (1) ◽  
pp. 29-36
Author(s):  
Shetu Roy ◽  
Sumaiya Umme Hani ◽  
Mohammad Abdul Mannan
Keyword(s):  
Control Strategy ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Pi Controller ◽  
Boost Converter ◽  
Damping Factor ◽  
Constant Voltage ◽  
Efficient Performance ◽  
Voltage Application ◽  
Conduction Mode

PI Controller is one of the eminent controller which holds majority of the applications in industrial purposes. This paper encompasses an analysis on the performance of PI controller for DC-DC Boost converter for constant voltage application where codifications of gains of PI controller are done in terms of natural frequency and damping factor. The converter has been designed to operate in continuous conduction mode and the voltage mode control strategy has been proposed by using pulse width modulation (PWM) with the PI controller. A set of gain parameters of PI controller can be selected to obtain the output of the PI controller with low rise time, quick settling time and also with more stability features. The effectiveness of this boost (or step up) converter with different set of PI controller gains has been verified through simulation where MATLAB/Simpower is used as the utensil. All the simulation results intrinsically emphasized on efficient performance of the proposed control strategy.

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