Informatics Publishing Limited

Raheel Afzal ¹, Mohsin Jamil ¹, Adeel Waqas ¹, Asad Nawaz ¹, M. Arifeen Ali ¹, Mazhar Hussain Mailk ¹

Affiliations
1 U. S. Pakistan Centre for Advance Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), H-12 Main Campus, Islamabad, PK

Abstract

Background/Objectives: Grid connected inverters are widely used to integrate renewable sources into the grid. The suitable power quality is required which can be either achieved using active or passive filters. This paper focuses on second order passive filters such as inductor capacitor (LC) and LC inductor (LCL) which can be used to attenuate harmonics for grid connect inverters. Methods/Statistical Analysis: To overcome the resonance of LCL filters passive damping^6-8 or active damping can be used. Active power filters are more expensive because of sensors and control systems additional cost. Passive damping strategies due to simple circuit and low cost are more favored. A LCL filter equipped with series or parallel resistor with a capacitor forms a LCL filter with damped resistor Addition of resistor to filter circuit will cause an increase in power losses. The peak resonance of LCL filter depends upon the value of resistor so select a value of resistor which decline peak resonance of filter. Findings: At resonance frequency they have some issues related to stability. LCL filter can be equipped with damping resistor but there are some power loss and introduction of voltage, current harmonic. Mathematical characteristics of passive filters such as LC, LCL, LCL with series resistor and LCL with parallel resistors are discussed in terms of effectiveness and stability in this paper. Application/Improvements: It is very useful for industrial application and power electronic converter.

Keywords

Capacitor (C), Grid Voltage (U_g), Inductor (L), Inverter Voltage (U_Inv).

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M. Arifeen Ali ¹, Mohsin Jamil ¹, Raheel Afzal ¹, Asad Nawaz ¹, Gussan Mufti ¹, M. Zubair ², Syed Omer Gilani ¹

Affiliations
1 School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Sector H-12 Main Campus, Islamabad, PK
2 U. S. Pakistan Centre for Advance Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Sector H-12 Main Campus, Islamabad, PK

Abstract

In this paper we represent a comparison between PID and Proportional resonant controllers for matrix converter used for unbalance load application. The simulation has been done in Matlab Simulink. A linear model transfer function of matrix converter has been taken to be control by Proportional Resonant controller and PID controllers. Various parameters are taken to find out the close loop system stability. First PID controller and then Proportional resonant controller checked for close loop system’s responses. Optimal controller has been suggested on the basis of best performance for reference sinusoidal tracking.

Keywords

Matrix Converter, PID Controller, Proportional Resonant Controller (PR).

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