An Efficient Control Implementation for Inverter Based Harmony Search Algorithm

Abstract

This research implements a PI controller based on harmony search (HS) optimization algorithm for voltage source inverter to improve the output performance under step load change conditions. The HS algorithm aims to handle the trial and error procedure used in finding the PI parameters and then apply the proposed control algorithm via the eZdsp TMS320F28355 board to link the inverter prototype with the Matlab Simulink. The mean absolute error (MAE) is used as an optimization problem to minimize the output voltage error for the developed controller (PI-HS) as compared to the PI controller based particale swarm optimization algorithm (PI-PSO). Based on the experimental results obtained, it is noted that the proposed controller (PI-HS) provides a good dynamic performance, robustness, constant voltage amplitude, and fast response in terms of overshoot, transient, and steadystate. Keyword:eZdsp TMS320F28335 board Harmony search PI controller SPWM with its C code Voltage source inverter Copyright © 2017 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Mushtaq Najeeb, Faculty of Electrical and Electronics Engineering, Pekan Campus, Universiti Malaysia Pahang, 26600, Pekan, Pahang, Malaysia. Email: eng.mushtaq2004@gmail.com INTRODUCTIONThe topic of the voltage source inverter is playing an important role nowadays in research area to generate an AC output for different applications [1]- [5]. An inverter device is required to convert a DC to an AC source because of the most applications are connected to the AC loads [6]- [9]. So, the main important feature of the inverter design is its controller improvement. In addition, the controller ability is to provide a good dynamic performance, keep a constant output voltage waveform and frequency regardless of different loads are connected [10]- [11].Therefore, there are a lot of various control algorithms have been carried out in the literature to solve the voltage control problems. The author in [12] has implemented a PI controller with a PWM algorithm for the PV inverter system using eZdsp F2812 board to keep the voltage waveform as a sinusoidal. Similarly, the researchers in [13] have also proposed a conventional controller of proportional-integral design to control the boost converter for the inverter system in order to get a good performance. In a related research, a field programmable gate array (FPGA) has been used in the PV inverter systems to develop the control algorithm described in [14]-[15] but it considered a time consuming task because it needs a wide knowledge in software programming. For a real time hardware setup, the reference [16] has used the platform of dSPACE DS1104 control unit to implement the PI controller of three-phase PV inverter system for a good dynamic performance. Also, same control unit has been used in [17] to enable the user to develop the control

Control of grid-connected inverter output current: a practical review

“…If the inverter is not operating properly, the injected power can cause voltage and frequency oscillations and poor grid power quality. The control algorithms of the inverters are a critical factor to assure that the injected power has low harmonic content and complies with international standards [5,12]. Some of these, such as the IEEE 1547-2003, determine harmonics limits for the current injected into the grid.…”

A parameter less stochastic optimization technique for tuning of speed PI controller of DTC induction motor drive

“…However it is observed that the controller performance deteriorates under varied drive operating conditions. It has been found from literature studies that the use of the stochastic optimization techniques for obtaining the optimized values of PI controllers are finding increased importance [1][2][3][4][5][6][7][8][9].…”