Mohd Azrik Roslan
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Preferred name
Mohd Azrik Roslan
Official Name
Mohd Azrik, Roslan
Alternative Name
Roslan, M. A.
Roslan, Azrik M.
Roslan, Mohd Azrik Bin
Main Affiliation
Scopus Author ID
56572552000
Researcher ID
GQM-7262-2022

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Grid connected microgrid with power offset synchronization using c2000 processor

2020-01-01 , Muhammad Syahril Bahari , Mohd Azrik Roslan , Baharuddin Ismail , Sengodan T.

Droop based technique are common in inverter based microgrid implementation since no communication lines are required. However, the technique gives poor and non-flexible PQ power sharing performances. The proposed microgrid structure implements a microgrid central controller which communicates with the inverters using a low bandwidth communication to provide PQ power references. This paper presents the implementation of the proposed microgrid control, communication and synchronization using c2000 processor in Matlab Simulink.

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Effect of Effective Microorganisms (EM) on concrete performance

2020-06-10 , Syakirah Afiza Mohammed , Nur Liza Rahim , Mohd Azrik Roslan

Concrete technology is life-long research, that strives to discover the best additives or admixtures that are able to produce good concrete in terms of physical, chemical and mechanical properties in a more economical, sustainable, environmental friendly and obtainable. This study focuses the effect of different percentages of EM toward strength of concrete. The compressive strength test was carried out to analyse these properties by using the concrete cubes with size 100 mm x 100 mm x 100 mm. These concrete mixes were tested at different ages which are 7, 14 and 28 days. Effective microorganism (EM) replacement percentages are 5%, 10% and 15% and the strength of concrete with EM replacement will be compared with the control sample. All the cubes were cured by immersed in the water for curing process before the compressive strength tests were conducted. The finding shows that the workability degree of EM mixture is similar with the conventional mixture. The compressive strength increase with the increment of EM content. The results shows that 10% of EM could be the optimum value of water replacement in concrete production to improve strength and durability.

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AC power flow analysis for inverters in microgrid application

2022-01-01 , Mohd Azrik Roslan , Syahrul Ashikin Azmi , Ahmed K.H.

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 impact of different line impedance to the power flow in AC microgrid. In this paper, AC power flow of an inverter-based system connected to a common ac bus through purely resistive, inductive or complex line impedances is investigated. For each line impedance case, the effect of an inverter's output voltage power angle and amplitude on the active and reactive power flow are studied. Several active and reactive powers plots are generated in 3D surf plots to visualize the impact of line impedance on the power flow in an AC system.

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Microgrid synchronization using power offset through a central controller

2020-01-07 , Muhammad Syahril Bahari , Mohd Azrik Roslan , Baharuddin Ismail

A high penetration of renewable energy in power systems gives rise to the inverter based distributed generators (DG) in the current microgrid system. With the ability of microgrid to operate in both islanded and grid connected mode, a robust and reliable coordination and synchronization between the DGs and the utility grid is crucial to provide a seamless transition between operation modes. Droop based technique is the most popular method in microgrid system, however, voltage or current transient are present during mode transition. A power offset synchronization technique is proposed to provide a seamless transition between modes of operation. The results show that the mode transition is smooth and seamless without any voltage or current transients.

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