Syahrul Ashikin Azmi

• Bsc, MSc, PhD
• Lecturer at University of Malaysia, Perlis

This paper deals with the dSPACE DS1104 based implementation of closed-loop motor drive system using asymmetric converter. The mathematical model of the drive has been simulated in the MATLAB/Simulink environment to analyze the performance of the drive system. The simulated results are then validated with the experimental investigation. For experim...

This work focuses on designing a concentrated solar power water desalination system (CSPWDS). A set of four Fresnel lenses (FRL) are used to concentrate the solar power at their corresponding focal points. The objective is to focus the irradiance power at a small area, where the temperature could reach over a 1000 Cͦ at its focal point. This study...

The injection of dc current offset into ac networks may impacted the lifespan of the distribution system equipment including isolation transformers and measurement devices and in serious event may cause equipment’s malfunction. This paper intents to eliminate dc current offsets in the output currents using a combinational of proportional-integral (...

With the rise in electricity demand, various additional sources of generation, known as Distributed Generation (DG), have been introduced to boost the performance of power systems. A hybrid multi-objective Evolutionary Programming-Firefly Algorithm (MOEPFA) technique is presented in this study for solving multi-objective power system problems which...

In a microgrid system, proper current distribution and load sharing strategies are essential to achieve reliable parallel operation. Line impedance is an important factor when implementing a control technique for an inverter for microgrid operation, whether it is operating in grid connected or island mode. It is sometime difficult to visualize the...

This paper presents the optimal allocation and sizing of multi distributed generation (DG) units including different load models using evolutionary programming (EP) in solving power system optimization problem. This paper also studies on the effect of multi DG placement in different load model. To optimize the power distribution system, multi DG un...

Nowadays electric vehicle has increasingly gained much popularity indicated by growing global share market targeted at 30% by 2030 after recording 7.2million global stock in 2019. Compared to Internal Combustion Engine (ICE) counterpart, Battery Electric Vehicles (BEV) produce zero tailpipe emission which greatly reducing carbon footprints. Inducti...

This study proposes a duty cycle-based direct search method that capitalizes on a bioinspired optimization algorithm known as the salp swarm algorithm (SSA). The goal is to improve the tracking capability of the maximum power point (MPP) controller for optimum power extraction from a photovoltaic system under dynamic environmental conditions. The p...

Three phase AC induction motor is the workhorse in industry where they count for 85% of the type of motor used. They are mostly used as prime movers for fan, pump, and centrifuge where conventionally, operated at fixed speed. Variable speed drives have proven to give better efficiency compared to mechanical control such as using valve or damper in...

Three phase induction motors are the workhorse of industry. Variable speed operation of the motor enables substantial energy savings through implementation of variable frequency drives. This project concerns on the design and implementation of three-phase voltage source inverter (VSI) for variable frequency drive. The focus was to generate variable...

p>This paper presents an integration of distributed generation and capacitor in radial distribution system via Firefly Algorithm (FA). In this study, the FA is developed in order to determine the optimal location and size for compensation schemes namely distributed generation (DG) and compensating capacitor (CC). The FA which is a meta-heuristic al...

This paper presents the performance of a three-phase current source inverter (CSI) in island mode voltage-controlled operation. Simple converter structure, low switching count and inherent boosting capability among the features offered by CSI. However, less investigation has been done with regards to the performance of CSI especially on its control...

To increase energy yield from an installed photovoltaic (PV) array, particularly during partial shading condition (PSC), a new technique based on reconfigurable PV array interconnection is proposed in this work. The proposed technique works by dynamically changing the interconnection of PV modules to form a new configuration using a switching matri...

To increase energy yield from an installed photovoltaic (PV) array, particularly during partial shading condition (PSC), a new technique based on reconfigurable PV array interconnection is proposed in this work. The proposed technique works by dynamically changing the interconnection of PV modules to form a new configuration using a switching matri...

This paper is presenting an implement of Internet of Things (IoT) monitoring and environment control for indoor cultivation of oyster mushroom. By using IoT based remote monitoring system not only the labor cost can be reduced with cover a bigger area, but can improve the productivity of the oyster mushroom by control the most suitable environment...

The performance of a traditional solar still system can be improved by modifying the desalination processes involved. In this work, a simple experimental model of a one-sided solar stiller is build and tested. The solar still system is modified with a solar cooling fan and a preheating solar collector. The fan is used to increase the cooling rate o...

A standalone 3-phase half-bridge multilevel inverter with simple basic unit cells coupled to solar power generation is proposed. This proposed inverter is able to operate in either charging mode or inverter mode, which is suitable for solar power generation using photovoltaic modules. The active switches (power MOSFET) in this proposed inverter is...

This paper proposes a new regular sampled pulse width modulation (PWM) for three-phase current source inverters. The theoretical basis of the proposed modulation strategy is described, including dwell time calculations and switching sequence selection. This strategy is well suited for digital implementation, and enjoys all the flexibilities and deg...

This study presents new direct regular-sampled pulse width modulation (DRSPWM) for grid connected three-phase current source inverters. The theoretical basis of the presented modulation strategy is described in detail and includes dwell time calculations and switching sequence selection. The modulation strategy is simple and suited for digital impl...

This paper investigates the suitability of selective harmonic elimination (SHE) for low-loss multimegawatt grid-connected photovoltaic (PV) inverters. The proposed system is able to meet utilities regulations, IEEE and IEC standards. In an attempt to substantiate the potential superiority of SHE over carrier-based or space-vector pulsewidth modulat...

This paper proposes a new regular sampled pulse width modulation (PWM) for three-phase current source inverters. The theoretical basis of the proposed modulation strategy is described, including dwell time calculations and switching sequence selection. This strategy is well suited for digital implementation, and enjoys all the flexibilities and deg...

This paper investigates the suitability of selective harmonic elimination (SHE) for low-loss multimegawatt grid-connected photovoltaic (PV) inverters. The proposed system is able to meet utilities regulations, IEEE and IEC standards. In an attempt to substantiate the potential superiority of SHE over carrier-based or space-vector pulsewidth modulat...

The voltage source inverter is mainly used for grid interfacing of distributed generation systems. In order to boost the voltage of a renewable energy source to the required dc voltage level, a dc-dc converter is necessary even though the cost and complexity of the system are increased. Thus, in improving the cost and life expectancy of the power e...

Recent changes in the electric utility infrastructure created the opportunities for many technological innovations including the application of DG in order to achieve a variety of benefits. To achieve the benefits, factors such as the capacity of the units and the best location have to be considered. This problem was addressed in this study by the...

Rapid industrialization and population growth have resulted in an escalation in the electrical power demand. Due to limited area and slow progress in network expansion some regions have become high density load areas, for example in the urban areas. These phenomena may lead to power quality and also voltage stability issues. This paper presents the...