Grin logo
en de es fr
Shop
GRIN Website
Publier des textes, profitez du service complet
Go to shop › Technologie

Implementation of P&O MPPT based Zeta Converter fed

Three-phase Induction Motor

Résumé Extrait Résumé des informations

This paper proposes the use of Zeta Converter as a single stage power conversion concept for adjustable speed drives in photovoltaic applications. Solar panel efficiency is low, to track the maximum power from panel, Perturb & Observe (P&O) algorithms used in Maximum Power Point Tracking (MPPT). Output Torque-Speed characteristics of Induction Machine has been modelled and compared by MATLAB/Simulink software.

Extrait


Abstract -This paper proposes use of Zeta Converter as a single stage power conversion concept for adjustable speed drives in photovoltaic applications. Solar panel efficiency is low, To track the maximum power from panel, Perturb & Observe (P&O) algorithms used in Maximum Power Point Tracking (MPPT). Output Torque-Speed characteristics of Induction Machine has been modelled and compared by MATLAB/Simulink software .

Keywords: PV Array, P&O method, with MPPT state, Induction Motor (IM).

I. INTRODUCTION

The best way to utilize the electric energy produced by the PV array is to deliver it to the AC mains directly, without using battery storage. The absence of fuel cost, noise, pollution the solar energy source is using for renewable energy among all other sources. The maintenance cost less. However, the PV system has low efficiency due irradiation and temperature. To improve the efficiency of PV system, Maximum Power Point Tracking (MPPT) has been developed such as P&O, Constant Voltage and so on. Previously dc source will be a supply and power to quasi-Z-source inverter with RL load. In this paper solar panel will be an input source to quasi-Z-source inverter with MPPT P&O Techniques with Induction motor have been simulated.

Dr.K.Ranjith Kumar,

Assistant Professor; Dept. of EEE,

Government College of Technology,

II. BLOCK DIAGRAM

The block diagram of overall PV conversion using MPPT is show in figure 1. The generated voltage (VPV) and current (IPV) from PV array are input for MPPT control. This MPPT control block is calculate the reference voltage. By comparing the reference voltage and PV voltage, the switching pulses (driver signals) generated to switch ON the converter. The converter DC-AC or AC-DC which is depends on the load.

illustration not visible in this excerpt

Figure 1: Block diagram of overall PV conversion using MPPT

III.MODELLING OF PV ARRAY

The equivalent circuit of a PV cell is as shown in Figure 2.Where Iph represents the cell photo current, I0 represents the diode saturation current, I and V are cell output current and cell output voltage respectively. Rp is shunt resistance. Rs are series resistance. They ideal PV module for one diode circuit.

illustration not visible in this excerpt

Figure 2: PV cell model

The mathematical model of PV array for single diode circuit can be represented by the following equation [1]:

A. Photo Current (Iph):

Iph depends on the solar irradiation and cell’s operating temperature according to the below equation.

Abbildung in dieser Leseprobe nicht enthalten

B. Reverse Saturation Current (Irs):

Reverse saturation current of PV system can be determined by the given equation.

Abbildung in dieser Leseprobe nicht enthalten

C. Diode Saturation Current (I0):

Saturation current of PV system varies with the cell temperature can be determined by given equation.

Abbildung in dieser Leseprobe nicht enthalten

D. output current (I):

The equation for output current of the PV system of single diode model presented in Figure 1 is given by,

Abbildung in dieser Leseprobe nicht enthalten

From the above equations,

Isc is cell’s short circuit current(A),K is the temperature coefficient(0.0017A/K),Tc is the operating temperature(°C), Tref is the reference temperature(°C), H is solar isolation (kW/m2), q is charge of electron (1.6×10-19C), Voc is open circuit voltage(V), Ns is number of cells connected in series(36), k is Boltzmann constant(1.38×10-23 J/K), A is ideal factor(1.6), Ego is band gap energy(1.1eV), Np is number of parallel connection of cell(1).

illustration not visible in this excerpt

Figure 3: I-V curve of solar cell

illustration not visible in this excerpt

Figure 4: : P-V curve of solar cell

In this paper Trina solar 240Wp PV module is taken and the name-plate details are given in Table 1.

Table 1: electrical characteristics data of Trina solar 240Wp PV module

illustration not visible in this excerpt

IV. MPPT ALGORITHM

To improve efficiency of solar panel Maximum Power Point Tracking (MPPT) is used. It includes electronic system to operate the PV modules in a manner that allows the modules to produce all the power. To track the maximum power several techniques are used. The most popular techniques are Perturb & Observe (P&O), Incremental Conductance(IC), Constant Voltage (CV), Open Circuit Voltage, Neural networks and Fuzzy logic. All these methods have their own advantages and disadvantages. The choice of the algorithm depending on the implementation cost, time, and complexity, efficient to track maximum power . In this paper Perturb and Observe (P&O) technique are used with constant and variable duty cycle respectively.

P&O METHOD

It is simplest method of MPPT to implement. In this method output power of solar is checked with the previous output power. If the voltage increasing with power increases then the duty cycle D is increased. For voltage decreasing with power increases duty cycle D is decreased.

The entire process shown as flowchart in Figure 5.

Abbildung in dieser Leseprobe nicht enthalten

Figure 5: Flow Chart of P&O MPPT

V. INDUTION MOTOR

An electric motor is a device which converts an electrical energy into mechanical energy. This mechanical energy then can be supplied to various types of load. As ac supply is commonly available. The ac motors are classified as single and three phase induction motors, synchronous motors and some special purpose motors. The important advantages of three phase induction motors over other types are self-starting property, no need of starting device, higher power factor, good speed regulation and robust construction. There are two types of rotor constructions which are used for induction motors are,

1. Squirrel cage rotor and
2. Slip ring or Wound rotor.

Here we used in Squirrel cage induction motor and its performance can be analysed through in MATLAB/Simulink.

VI. SIMULATION RESULTS

The simulation of MPPT techniques was carried out and plotted graph forinduction motor with stage performance and the simulated circuits.

illustration not visible in this excerpt

Figure 6: Simulation of Zeta Converter with P&O MPPT technique

illustration not visible in this excerpt

Figure 7: Simulation result of Zeta Converter with P&O MPPT technique output

illustration not visible in this excerpt

Figure 8: Simulation of Zeta Converter with P&O MPPT method and Induction Motor

Abbildung in dieser Leseprobe nicht enthalten

Figure 9: Simulation result of Zeta Converter with P&O MPPT method and Induction Motor stator output

Abbildung in dieser Leseprobe nicht enthalten

Figure 10: Simulation result of Zeta Converter with P&O MPPT method and Induction Motor mechanical output

VII. CONCLUSION

In this paper, analysed the performance of Zeta Converters in with P&O MPPT technique in Induction Motor and the simulation designs are simulated using MATLAB/Simulink.

REFERENCES

1. F.Baabjerg, A.Consoli, J.A.Ferrira, J.D.Vanwyk. “The future of electronic power processing and conversion”, IEEE Transactions on industry Applications,vol.41,no.1,2005,pp.3-8.

2. B.K.Bose, “The past , present and future of power electronics-guest introduction”, IEEE on industrial electronics magazine, vol.3,no.2,2009,pp. 7-11.

3. B.Bugar, “Advanced solar power electronics", in proc. Of international symposium on power semiconductor devices and IC’s- ISPSD,2010,pp. 3-10.

4. E.Niculescu, “modeling the pwm zeta converter in discontinuous conductionmode”, electro technical conference,2008,pp. 651-657.

5. Mathew C.Kessler, “synchronous inverse SEPIC using the ADP1870/ADP1872 Provides high efficiency for non-inverting buck/boost applications” AN-1075,pp. 1-7.

6. W.Gu, “Designing a SEPIC Converter”, national semi-conductor, application note 1484,june 2007, pp. 1-7.

Frequently Asked Questions

What is the purpose of this document?

This document appears to be an academic paper analyzing the use of a Zeta Converter as a single-stage power conversion concept for adjustable speed drives in photovoltaic (PV) applications. It includes simulations and analysis related to Maximum Power Point Tracking (MPPT) and induction motor performance.

What is a Zeta Converter, and why is it being used?

The Zeta Converter is being proposed as a way to convert power from a PV array to drive an adjustable speed induction motor. It offers single-stage power conversion which potentially simplifies the system.

What is Maximum Power Point Tracking (MPPT)?

MPPT is a technique used to improve the efficiency of solar panels. It optimizes the operating point of the PV modules to produce the maximum possible power output. The paper focuses on the Perturb & Observe (P&O) algorithm for MPPT.

How does the P&O MPPT method work?

The Perturb & Observe (P&O) method is a simple MPPT algorithm. It checks the output power of the solar panel and compares it to the previous output power. If increasing the voltage results in an increase in power, the duty cycle is increased. If decreasing the voltage results in an increase in power, the duty cycle is decreased. This process is repeated to track the maximum power point.

What is the role of the induction motor in this system?

The induction motor is the load being powered by the PV system and Zeta Converter. The paper models the torque-speed characteristics of the induction motor and simulates its performance with the MPPT-controlled Zeta Converter.

What are the key components of the PV array model?

The PV array model considers the photocurrent (Iph), diode saturation current (I0), shunt resistance (Rp), and series resistance (Rs). These parameters are used to model the I-V and P-V characteristics of the solar cell.

What simulation software was used?

MATLAB/Simulink was used to simulate the system and analyze its performance.

What are the key results of the simulation?

The simulation results show the performance of the Zeta Converter with the P&O MPPT technique driving the induction motor. The results include stator output and mechanical output characteristics of the induction motor.

What are the keywords associated with this paper?

The keywords are: PV Array, P&O method, with MPPT state, and Induction Motor (IM).

Which PV module is analyzed?

The Trina Solar 240Wp PV module is analyzed and its electrical characteristics are provided.

What is the conclusion of the study?

The paper concludes that it has analyzed the performance of Zeta Converters with P&O MPPT technique in driving an Induction Motor through simulations using MATLAB/Simulink.

Fin de l'extrait de 4 pages  - haut de page

Acheter maintenant

Titre: Implementation of P&O MPPT based Zeta Converter fed

Essai Scientifique , 2015 , 4 Pages , Note: C

Autor:in: K.R. Sasitharan (Auteur)

Technologie
Lire l'ebook

Résumé des informations

Titre
Implementation of P&O MPPT based Zeta Converter fed
Sous-titre
Three-phase Induction Motor
Université
Anna University  (GOVERNMENT COLLEGE OF TECHNOLOGY,COIMBATORE)
Cours
M.E-POWER SYSTEMS ENGINEERING
Note
C
Auteur
K.R. Sasitharan (Auteur)
Année de publication
2015
Pages
4
N° de catalogue
V295167
ISBN (ebook)
9783656973485
ISBN (Livre)
9783656973492
Langue
anglais
mots-clé
implementation mppt zeta converter three-phase induction motor
Sécurité des produits
GRIN Publishing GmbH
Citation du texte
K.R. Sasitharan (Auteur), 2015, Implementation of P&O MPPT based Zeta Converter fed, Munich, GRIN Verlag, https://www.grin.com/document/295167
Lire l'ebook
  • Si vous voyez ce message, l'image n'a pas pu être chargée et affichée.
  • https://cdn.openpublishing.com/images/brand/1/preview_popup_advertising.jpg
  • Si vous voyez ce message, l'image n'a pas pu être chargée et affichée.
  • Si vous voyez ce message, l'image n'a pas pu être chargée et affichée.
  • Si vous voyez ce message, l'image n'a pas pu être chargée et affichée.
  • Si vous voyez ce message, l'image n'a pas pu être chargée et affichée.
Extrait de  4  pages
Grin logo
  • Grin.com
  • Page::Footer::PaymentAndShipping
  • Contact
  • Prot. des données
  • CGV
  • Imprint