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Considering the recent drop (up to 86%) in photovoltaic (PV) module prices from 2010 to 2017, many countries have shown interest in investing in PV plants to meet their energy demand. In this study, a detailed design methodology is presented to achieve high benefits with low installation, maintenance and operation costs of PV plants. This procedure includes in detail the semi-hourly average time meteorological data from the location to maximise the accuracy and detailed characteristics of different PV modules and inverters. The minimum levelised cost of energy (LCOE) and maximum annual energy are the objective functions in this proposed procedure, whereas the design variables are the number of series and parallel PV modules, the number of PV module lines per row, tilt angle and orientation, inter-row space, PV module type, and inverter structure. The design problem was solved using a recent hybrid algorithm, namely, the grey wolf optimiser-sine cosine algorithm. The high performance for LCOE-based design optimisation in economic terms with lower installation, maintenance and operation costs than that resulting from the use of maximum annual energy objective function by 12%. Moreover, sensitivity analysis showed that the PV plant performance can be improved by decreasing the PV module annual reduction coefficient.
Tekai Eddine Khalil Zidane; Mohd Rafi Adzman; Mohammad Faridun Naim Tajuddin; Samila Mat Zali; Ali Durusu; Saad Mekhilef. Optimal Design of Photovoltaic Power Plant Using Hybrid Optimisation: A Case of South Algeria. Energies 2020, 13, 2776 .
AMA StyleTekai Eddine Khalil Zidane, Mohd Rafi Adzman, Mohammad Faridun Naim Tajuddin, Samila Mat Zali, Ali Durusu, Saad Mekhilef. Optimal Design of Photovoltaic Power Plant Using Hybrid Optimisation: A Case of South Algeria. Energies. 2020; 13 (11):2776.
Chicago/Turabian StyleTekai Eddine Khalil Zidane; Mohd Rafi Adzman; Mohammad Faridun Naim Tajuddin; Samila Mat Zali; Ali Durusu; Saad Mekhilef. 2020. "Optimal Design of Photovoltaic Power Plant Using Hybrid Optimisation: A Case of South Algeria." Energies 13, no. 11: 2776.
Temperature and solar radiation have large effects on the performance of photovoltaic (PV) systems. PV cell temperature is related to the ambient temperature, while the solar radiation incident on PV surface depends on the slope and azimuth of the PV panels. Furthermore, ground reflectance (albedo) affects the solar radiation incident on the PV surface and hence influences its performance. Nevertheless, the impact of some important factors on the PV performance such as the ground reflectance at different tilt angles and temperature coefficient of power under Middle East (temperate) climatic conditions are scarcely reported. In this research paper, a techno-economic analysis has been done to investigate the impact of temperature, tilt and azimuth angles, and ground reflectance on the performance of solar energy system. HOMER software was used as a tool in this study where Choman, Iraq, was selected as a case study. The results indicate that with a base case (temperature coefficient of − 0.48%/ °C, albedo of 20% and ambient temperature of 11 °C), facing the PV to south with a tilt angle of 40° or 45° results in the most economical system by having net present cost of $70595 and cost of energy of $0.54/kWh. Furthermore, PV modules with high sensitivity to temperature are found to be an attractive option based on Choman ambient temperature. Meanwhile, increasing the ground reflectance from 10 to 90% results in an increase of the annual optimum tilt angle from 38° to 52° and a decrease of the PV required capacity from 20.8 to 19.4 kW (for temperature coefficient of − 0.48%/ °C). The results prove that the studied parameters must be treated well to establish an enabling environment for PV development in Iraq.
Ali Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Makbul A. M. Ramli. Impacts of albedo and atmospheric conditions on the efficiency of solar energy: a case study in temperate climate of Choman, Iraq. Environment, Development and Sustainability 2020, 23, 989 -1018.
AMA StyleAli Saleh Aziz, Mohammad Faridun Naim Tajuddin, Mohd Rafi Adzman, Makbul A. M. Ramli. Impacts of albedo and atmospheric conditions on the efficiency of solar energy: a case study in temperate climate of Choman, Iraq. Environment, Development and Sustainability. 2020; 23 (1):989-1018.
Chicago/Turabian StyleAli Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Makbul A. M. Ramli. 2020. "Impacts of albedo and atmospheric conditions on the efficiency of solar energy: a case study in temperate climate of Choman, Iraq." Environment, Development and Sustainability 23, no. 1: 989-1018.
Mohd Fayzul Mohammed; Azralmuknin Azmi; Muhammad Faridun Naim Tajuddin; Noor Hasnizam Hanafi; Mohd Rafi Adzman; Zainuddin Mat Isa. Implementation of IoT based Electrical Metering System. Journal of Advanced Research in Dynamical and Control Systems 2019, 11, 894 -899.
AMA StyleMohd Fayzul Mohammed, Azralmuknin Azmi, Muhammad Faridun Naim Tajuddin, Noor Hasnizam Hanafi, Mohd Rafi Adzman, Zainuddin Mat Isa. Implementation of IoT based Electrical Metering System. Journal of Advanced Research in Dynamical and Control Systems. 2019; 11 (12-SPECIAL):894-899.
Chicago/Turabian StyleMohd Fayzul Mohammed; Azralmuknin Azmi; Muhammad Faridun Naim Tajuddin; Noor Hasnizam Hanafi; Mohd Rafi Adzman; Zainuddin Mat Isa. 2019. "Implementation of IoT based Electrical Metering System." Journal of Advanced Research in Dynamical and Control Systems 11, no. 12-SPECIAL: 894-899.
Iraq has massive potential for electricity generation from solar energy. Because the country currently suffers from daily electricity shortages, a grid-connected PV system is an unsuitable option since the PV cannot serve the load during the electricity blackouts. This paper aims to analyze the techno-economic and environmental feasibility of a solar PV microgrid system which is able to supply the load during both grid availability and outage periods. A household in Baghdad was selected as a case study. HOMER software was used to carry out the overall analysis using five different control strategies. The results indicated that the most economical configuration was achieved by allowing the grid to charge the batteries at all rates, with a net present cost (NPC) of $29,713. A sustainability assessment revealed that preventing the grid from charging the battery resulted in the highest renewable fraction and the lowest CO2 emissions with 64.9% and 4,533 kg/year, respectively. Furthermore, inserting a diesel generator to an economically optimized system was found to reduce the NPC by 11.6%, while increasing the CO2 emissions by 32.7%. This study showed that implementing this sort of project can provide clean, economical, and continuous electricity production in countries with daily blackouts.
Ali Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Mohd Fayzul Mohammed; Makbul A.M. Ramli. Feasibility analysis of grid-connected and islanded operation of a solar PV microgrid system: A case study of Iraq. Energy 2019, 191, 116591 .
AMA StyleAli Saleh Aziz, Mohammad Faridun Naim Tajuddin, Mohd Rafi Adzman, Mohd Fayzul Mohammed, Makbul A.M. Ramli. Feasibility analysis of grid-connected and islanded operation of a solar PV microgrid system: A case study of Iraq. Energy. 2019; 191 ():116591.
Chicago/Turabian StyleAli Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Mohd Fayzul Mohammed; Makbul A.M. Ramli. 2019. "Feasibility analysis of grid-connected and islanded operation of a solar PV microgrid system: A case study of Iraq." Energy 191, no. : 116591.
Arc fault detection in a power system network is a vital diagnostic test for condition monitoring in order to remain the consistency of the service. The issue of electrical faults has been largely investigated in the literature to foresee the existence of arc fault at the earliest stage. However, the identification measurement has faced noise disturbance from surrounding area. Thus, this paper presents an arc fault signals detection and analysis using Discrete Wavelet Transform (DWT) technique as a denoising technique. The effectiveness that influence the different types of mother wavelets is analyzed based on calculated signal to noise ratio (SNR) before denoising and after denoising, mean square error (MSE), correlation coefficient (CC) and mean absolute percentage error (MAPE). Each mother wavelet will be used to extract important features of a voltage signal from a single measurement point that were performed under 4th decomposition level using Universal (Sqtwolog) thresholding rule with soft thresholding function.The results are manipulated based on Haar (haar), Daubechies (db), Symlets (sym), Coiflets (coif), BiorSplines (bior) and Reverse-Bior (rbio) mother wavelets. The outcome demonstrates the data analysis approaches can provide better understanding to obtain the most optimum mother wavelet hence can enhance the performance of arc fault detection using wavelet transform as a denoising purposed.
Melaty Amirruddin; Mohd Rafi Adzman; Syahirah Abdul Halim; Nur Adyani Mohd Affendi; Muzamir Isa; Hana Abdull Halim; Muhd Hafizi Idris. Evaluation of Denoising Performance for Noisy Arc Fault Signal Based on Mother Wavelet Selection. 2019 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE) 2019, 1 -6.
AMA StyleMelaty Amirruddin, Mohd Rafi Adzman, Syahirah Abdul Halim, Nur Adyani Mohd Affendi, Muzamir Isa, Hana Abdull Halim, Muhd Hafizi Idris. Evaluation of Denoising Performance for Noisy Arc Fault Signal Based on Mother Wavelet Selection. 2019 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). 2019; ():1-6.
Chicago/Turabian StyleMelaty Amirruddin; Mohd Rafi Adzman; Syahirah Abdul Halim; Nur Adyani Mohd Affendi; Muzamir Isa; Hana Abdull Halim; Muhd Hafizi Idris. 2019. "Evaluation of Denoising Performance for Noisy Arc Fault Signal Based on Mother Wavelet Selection." 2019 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE) , no. : 1-6.
At present, photovoltaic (PV) power plants are growing rapidly to respond to the high demand for energy. In this case, improving the levelized cost of electricity (LCOE) and produced energy for PV power plants is a complicated design tradeoff that involves several parameters, such as meteorological data variation, nonlinear operation of the PV plant components, inverter types, and PV module efficiency. Hence, this study intended to present the application of recent meta-heuristic techniques, namely, salp swarm algorithm (SSA), whale optimization algorithm (WOA), and grey wolf optimization (GWO), for two different cases. The technology of crystalline silicon (c-Si) and thin-film cadmium telluride (CdTe) PV modules is adopted for economic considerations and to determine the suitable PV module for the PV power plant. The optimization process is considered to minimize the LCOE and suggest the optimal sizing of PV modules and inverters on the basis of several candidates and their arrangement within the available area with optimal PV module tilt angle and orientation, as well as the optimal distribution of PV modules among the inverters. The new approaches have been compared with particle swarm optimization (PSO) algorithm. The proposed technique (GWO) shows significant results compared with other methods (PSO) in solving the optimal design of the PV power plant. The PV plant LCOE using thin-film (CdTe) has the lowest value compared to crystalline silicon (c-Si). The PV module efficiency and technology affect the overall dimension of the PV power plant.
Tekai Eddine Khalil Zidane; Mohd Rafi Bin Adzman; Mohammad Faridun Naim Tajuddin; Samila Mat Zali; Ali Durusu. Optimal configuration of photovoltaic power plant using grey wolf optimizer: A comparative analysis considering CdTe and c-Si PV modules. Solar Energy 2019, 188, 247 -257.
AMA StyleTekai Eddine Khalil Zidane, Mohd Rafi Bin Adzman, Mohammad Faridun Naim Tajuddin, Samila Mat Zali, Ali Durusu. Optimal configuration of photovoltaic power plant using grey wolf optimizer: A comparative analysis considering CdTe and c-Si PV modules. Solar Energy. 2019; 188 ():247-257.
Chicago/Turabian StyleTekai Eddine Khalil Zidane; Mohd Rafi Bin Adzman; Mohammad Faridun Naim Tajuddin; Samila Mat Zali; Ali Durusu. 2019. "Optimal configuration of photovoltaic power plant using grey wolf optimizer: A comparative analysis considering CdTe and c-Si PV modules." Solar Energy 188, no. : 247-257.
This paper focused on studying an algorithm of earth fault location in the medium voltage distribution network. In power system network, most of the earth fault occurs is a single line to ground fault. A medium voltage distribution network with resistance earthing at the main substation and an earth fault attached along the distribution network is modeled in ATP Draw. The generated earth fault is simulated, and the voltage and current signal produced is recorded. The earth fault location algorithm is simulated and tested in MATLAB. The accuracy of the earth fault location algorithm is tested at several locations and fault resistances. A possible correction technique is explained to minimize the error. The results show an improvement fault location distance estimation with minimum error.
N. S. B. Jamili; Mohd Rafi Adzman; S. R. A. Rahim; S. M. Zali; Muzamir Isa; H. Hanafi. Evaluation of earth fault location algorithm in medium voltage distribution network with correction technique. International Journal of Electrical and Computer Engineering (IJECE) 2019, 9, 1 .
AMA StyleN. S. B. Jamili, Mohd Rafi Adzman, S. R. A. Rahim, S. M. Zali, Muzamir Isa, H. Hanafi. Evaluation of earth fault location algorithm in medium voltage distribution network with correction technique. International Journal of Electrical and Computer Engineering (IJECE). 2019; 9 (3):1.
Chicago/Turabian StyleN. S. B. Jamili; Mohd Rafi Adzman; S. R. A. Rahim; S. M. Zali; Muzamir Isa; H. Hanafi. 2019. "Evaluation of earth fault location algorithm in medium voltage distribution network with correction technique." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 3: 1.
Demand of electrical power is growing rapidly and lead to the introduction of distributed generation (DG) into the local system. DG can helps in supporting the power demand and provide a more clean energy as it use renewable sources. However, the addition of DG into our power system may change the control and protection system of the distribution system. By using the IEEE 34 nodes test feeder as reference, the circuit was modelled with ATPDraw software. The aim of this paper is to study the effect of DG to the faults when it were located in several places. Besides that, the effect of location of DG was also investigated.
Wan Syaza Ainaa Wan Salman; Mohd Rafi Adzman; Muzamir Isa; Haziah Abdul Hamid; Noor Hasnizam Hanafi. Effect of Distributed Generation (DG) to Earth Fault. Lecture Notes in Electrical Engineering 2019, 229 -236.
AMA StyleWan Syaza Ainaa Wan Salman, Mohd Rafi Adzman, Muzamir Isa, Haziah Abdul Hamid, Noor Hasnizam Hanafi. Effect of Distributed Generation (DG) to Earth Fault. Lecture Notes in Electrical Engineering. 2019; ():229-236.
Chicago/Turabian StyleWan Syaza Ainaa Wan Salman; Mohd Rafi Adzman; Muzamir Isa; Haziah Abdul Hamid; Noor Hasnizam Hanafi. 2019. "Effect of Distributed Generation (DG) to Earth Fault." Lecture Notes in Electrical Engineering , no. : 229-236.
Off-grid hybrid energy systems (HESs) have become more cost-effective and reliable than single-source systems for the electrification of rural areas. This paper presents a techno-economic and environmental analysis of different hybrid systems to supply electricity to a typical Iraqi rural village. The HOMER software is utilized for the optimization of the systems using the multi-year module, which has been overlooked in the literature thus far. The analysis shows that the PV/hydro/diesel/battery HES is the most economical option with a net present cost (NPC) of $113201, in addition to having acceptable technical and environmental performance levels. Throughout the project’s 20 year lifetime, PV electricity production is reduced by 9.1% while diesel electricity production, CO2 emissions and served load are increased by 90.8%, 91.7% and 8.8%, respectively. The NPC for the multi-year module shows an increment of 22.5% in comparison with that of the single year module. Furthermore, the sensitivity analysis of some rarely reported parameters, such as water pipe losses, generator minimum load, battery roundtrip efficiency, battery setpoint state of charge, capacity shortage, PV capital cost multiplier and multi-year, demonstrated that variations in these parameters have significant effects on the system power flow and its economic analysis.
Ali Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Azralmukmin Azmi; Makbul A.M. Ramli. Optimization and sensitivity analysis of standalone hybrid energy systems for rural electrification: A case study of Iraq. Renewable Energy 2019, 138, 775 -792.
AMA StyleAli Saleh Aziz, Mohammad Faridun Naim Tajuddin, Mohd Rafi Adzman, Azralmukmin Azmi, Makbul A.M. Ramli. Optimization and sensitivity analysis of standalone hybrid energy systems for rural electrification: A case study of Iraq. Renewable Energy. 2019; 138 ():775-792.
Chicago/Turabian StyleAli Saleh Aziz; Mohammad Faridun Naim Tajuddin; Mohd Rafi Adzman; Azralmukmin Azmi; Makbul A.M. Ramli. 2019. "Optimization and sensitivity analysis of standalone hybrid energy systems for rural electrification: A case study of Iraq." Renewable Energy 138, no. : 775-792.
In recent years, the concept of hybrid energy systems (HESs) is drawing more attention for electrification of isolated or energy-deficient areas. When optimally designed, HESs prove to be more reliable and economical than single energy source systems. This study examines the feasibility of a combined dispatch (CD) control strategy for a photovoltaic (PV)/diesel/battery HES by combining the load following (LF) strategy and cycle charging (CC) strategy. HOMER software is used as a tool for optimization analysis by investigating the techno-economic and environmental performance of the proposed system under the LF strategy, CC strategy, and combined dispatch CD strategy. The simulation results reveal that the CD strategy has a net present cost (NPC) and cost of energy (COE) values of $110,191 and $0.21/kWh, which are 20.6% and 4.8% lower than those of systems utilizing the LF and CC strategies, respectively. From an environmental point of view, the CD strategy also offers the best performance, with CO2 emissions of 27,678 kg/year. Moreover, the results show that variations in critical parameters, such as battery minimum state of charge, time step, solar radiation, diesel price, and load growth, exert considerable effects on the performance of the proposed system.
Ali Aziz; Mohammad Tajuddin; Mohd Adzman; Makbul Ramli; Saad Mekhilef. Energy Management and Optimization of a PV/Diesel/Battery Hybrid Energy System Using a Combined Dispatch Strategy. Sustainability 2019, 11, 683 .
AMA StyleAli Aziz, Mohammad Tajuddin, Mohd Adzman, Makbul Ramli, Saad Mekhilef. Energy Management and Optimization of a PV/Diesel/Battery Hybrid Energy System Using a Combined Dispatch Strategy. Sustainability. 2019; 11 (3):683.
Chicago/Turabian StyleAli Aziz; Mohammad Tajuddin; Mohd Adzman; Makbul Ramli; Saad Mekhilef. 2019. "Energy Management and Optimization of a PV/Diesel/Battery Hybrid Energy System Using a Combined Dispatch Strategy." Sustainability 11, no. 3: 683.
Auto-reclose relay is an important relay used to reenergize a line after the line was tripped by main protection relay due to fault occurrence. Failure of auto-reclose relay to reenergize the line will make power can't be transmitted through the line and power system will be in stress condition. Knowledge of auto-reclose protection scheme is quite difficult to be understood and only few power system software has auto-reclose model for power system study and the software are costly. This research is about modelling auto-reclose relay and its' scheme using Matlab Simulink. The developed model has been developed with some limitations to simplify the modelling process and the results gained show the capability of Matlab Simulink software to be used to model the scheme for education and research purpose.
Muhd Hafizi Idris; Mohd Rafi Adzman; Mohammad Faridun Naim Tajuddin; Melaty Amirruddin; Mohd Alif Ismail. Auto-reclose Relay Simulation for Research and Education. 2018 4th International Conference on Electrical, Electronics and System Engineering (ICEESE) 2018, 29 -33.
AMA StyleMuhd Hafizi Idris, Mohd Rafi Adzman, Mohammad Faridun Naim Tajuddin, Melaty Amirruddin, Mohd Alif Ismail. Auto-reclose Relay Simulation for Research and Education. 2018 4th International Conference on Electrical, Electronics and System Engineering (ICEESE). 2018; ():29-33.
Chicago/Turabian StyleMuhd Hafizi Idris; Mohd Rafi Adzman; Mohammad Faridun Naim Tajuddin; Melaty Amirruddin; Mohd Alif Ismail. 2018. "Auto-reclose Relay Simulation for Research and Education." 2018 4th International Conference on Electrical, Electronics and System Engineering (ICEESE) , no. : 29-33.
The objective of this study was to evaluate the performance of a triangle loop antenna to assess its use as a potential sensor in partial discharge (PD) impulse signals detection. PD impulse signals were measured over a frequency up to 100 MHz at 3 kV through Needle-Plate Electrode experiment. The experiment was conducted to create an artificial PD acting as a breakdown that causes insulation failure. Subsequently, the characteristic of PD impulse signals was captured by triangle loop antenna with variation of diameters and number of turns. The number of turns is up to three turns and diameters of triangle loop antenna intervals are 6 cm, 8 cm and 10 cm. Then, the Fast Fourier Transforms (FFT) analysis was carried out to measure the frequency bandwidth. The results revealed that an experimental frequency is 32.01 MHz. Then, it can be observed that the amplitude value of peak-to-peak voltage (Vpp) for three turns 10 cm diameter of triangle loop antenna higher than the amplitude value for one turn and two turns of triangle loop antennas.
Melaty Amirruddin; Mohd Rafi Adzman; Nur Adyani Mohd Affendi; Muzamir Isa; Muhd Hafizi Idris; Nor Syafiqah Syahirah Mohamed; Syahirah Abdul Halim. Design of Triangle Loop Antenna for Partial Discharge Impulse Signal Detection. 2018 IEEE Student Conference on Research and Development (SCOReD) 2018, 1 -6.
AMA StyleMelaty Amirruddin, Mohd Rafi Adzman, Nur Adyani Mohd Affendi, Muzamir Isa, Muhd Hafizi Idris, Nor Syafiqah Syahirah Mohamed, Syahirah Abdul Halim. Design of Triangle Loop Antenna for Partial Discharge Impulse Signal Detection. 2018 IEEE Student Conference on Research and Development (SCOReD). 2018; ():1-6.
Chicago/Turabian StyleMelaty Amirruddin; Mohd Rafi Adzman; Nur Adyani Mohd Affendi; Muzamir Isa; Muhd Hafizi Idris; Nor Syafiqah Syahirah Mohamed; Syahirah Abdul Halim. 2018. "Design of Triangle Loop Antenna for Partial Discharge Impulse Signal Detection." 2018 IEEE Student Conference on Research and Development (SCOReD) , no. : 1-6.
Partial discharge (PD) is one of the most effective conditions monitoring for electrical equipment such as a transformer. Detecting PD, especially inside the transformer, is made possible through several methods. One of the methods is by detecting UHF signal emitted by PD. Although UHF detection method can be applied on site, a lot of research was also conducted in laboratories. Several methodologies have been proposed for the research. This study looks into the objectives, methodologies and results from such experiments.
Azharudin Mukhtaruddin; Muzamir Isa; Mazlee Mohd Noor; Mohd Rafi Adzman; Mohd Fadzil Ain. Review of UHF detection of partial discharge experimentation in oil-filled power transformer: Objectives, methodologies and results. AIP Conference Proceedings 2018, 2013, 020020 .
AMA StyleAzharudin Mukhtaruddin, Muzamir Isa, Mazlee Mohd Noor, Mohd Rafi Adzman, Mohd Fadzil Ain. Review of UHF detection of partial discharge experimentation in oil-filled power transformer: Objectives, methodologies and results. AIP Conference Proceedings. 2018; 2013 (1):020020.
Chicago/Turabian StyleAzharudin Mukhtaruddin; Muzamir Isa; Mazlee Mohd Noor; Mohd Rafi Adzman; Mohd Fadzil Ain. 2018. "Review of UHF detection of partial discharge experimentation in oil-filled power transformer: Objectives, methodologies and results." AIP Conference Proceedings 2013, no. 1: 020020.
This paper presents Whale Optimization Algorithm (WOA) Based Technique for Distributed Generation Installation in Transmission System. In this study, WOA optimization engine is developed for the installation of Distributed Generation (DG). Prior to the optimization process, a pre-developed voltage stability index termed Fast Voltage Stability Index (FVSI) was used as an indicator to identify the location for the DG to be installed in the system. Meanwhile, for sizing the DG WOA is employed to identify the optimal sizing. By installing DG in the transmission system, voltage stability and voltage profile can be improved, while power losses can be minimized. The proposed algorithm was tested on 30-bus radial distribution network. Results obtained from the EP were compared with firefly algorithm (FA); indicating better results. This highlights the strength of WOA over FA in terms of minimizing total losses.
Mohd Nurulhady Morshidi; Ismail Musirin; Siti Rafidah Abdul Rahim; Mohd Rafi Adzman; Muhamad Hatta Hussain. Whale Optimization Algorithm Based Technique for Distributed Generation Installation in Distribution System. Bulletin of Electrical Engineering and Informatics 2018, 7, 442 -449.
AMA StyleMohd Nurulhady Morshidi, Ismail Musirin, Siti Rafidah Abdul Rahim, Mohd Rafi Adzman, Muhamad Hatta Hussain. Whale Optimization Algorithm Based Technique for Distributed Generation Installation in Distribution System. Bulletin of Electrical Engineering and Informatics. 2018; 7 (3):442-449.
Chicago/Turabian StyleMohd Nurulhady Morshidi; Ismail Musirin; Siti Rafidah Abdul Rahim; Mohd Rafi Adzman; Muhamad Hatta Hussain. 2018. "Whale Optimization Algorithm Based Technique for Distributed Generation Installation in Distribution System." Bulletin of Electrical Engineering and Informatics 7, no. 3: 442-449.
Microbubble floating in liquid dielectric and subjected to an electric field may initiate partial discharge (PD). This paper studies the parameters that affect the initiation through a computer simulation. This study inspects how the type of gas inside the microbubble, the size of the microbubble, distance from an electric field, Eo, source and, the magnitude of source’s voltage affect the start of PD. For a prolate spheroid shape, there is an important parameter called ‘c’. This ratio is between the radius of the microbubble polar (‘a’) and the radius of the equator (‘b’). At constant Eo and c, different gases will initiate PD at different distances from source due to differences in a localised electric field inside the microbubble (Emax). Emax is one of the important factors for PD initiation. It is interesting to report that if the ‘a’ and ‘b’ values are chosen so that ‘c’ will be constant, changes in Emax are insignificant. On the other hand, changes in ‘c’ will result in significant changes in Emax. Finally, changes in source’s voltage certainly affect the Emax.
Azharudin Mukhtaruddin; Muzamir Isa; Mazlee Mohd Noor; Mohd Rafi Adzman; Baharuddin Ismail; Mohamad Nur Khairul Hafizi Rohani; Mohd Fadzil Ain. SIMULATION ON THE CONDITIONS AFFECTING PARTIAL DISCHARGE INITIATION IN MICROBUBBLE IMMERSED IN DIELECTRIC LIQUID. Jurnal Teknologi 2018, 80, 1 .
AMA StyleAzharudin Mukhtaruddin, Muzamir Isa, Mazlee Mohd Noor, Mohd Rafi Adzman, Baharuddin Ismail, Mohamad Nur Khairul Hafizi Rohani, Mohd Fadzil Ain. SIMULATION ON THE CONDITIONS AFFECTING PARTIAL DISCHARGE INITIATION IN MICROBUBBLE IMMERSED IN DIELECTRIC LIQUID. Jurnal Teknologi. 2018; 80 (6):1.
Chicago/Turabian StyleAzharudin Mukhtaruddin; Muzamir Isa; Mazlee Mohd Noor; Mohd Rafi Adzman; Baharuddin Ismail; Mohamad Nur Khairul Hafizi Rohani; Mohd Fadzil Ain. 2018. "SIMULATION ON THE CONDITIONS AFFECTING PARTIAL DISCHARGE INITIATION IN MICROBUBBLE IMMERSED IN DIELECTRIC LIQUID." Jurnal Teknologi 80, no. 6: 1.
This paper presents de-noising of PD signal using three different techniques; ANN, FFT and DWT. The objective of this paper is to yield the PD signal from the disturb signal which is the combination of PD and noise signal. These signals are generated using EMTP-ATP simulation environment. This research used the straightforward procedure in the de-noising technique. The accuracy of the de-noising is based on the calculation of SNR. The result of this research shows ANN is the best de-noising technique as the calculated SNR is the highest with 0.635938, followed by FFT technique with SNR of 0.452903 and lowest SNR is DWT with -0.154054.
Nur Afifah Yusoff; Muzamir Isa; Haziah Hamid; Mohd. Rafi Adzman; Mohamad Nur Khairul Hafizi Rohani; Chang Yii Chai; Nurul Nadiah Ayop; Chai Chang Yii. Denoising technique for partial discharge signal : A comparison performance between artificial neural network, fast fourier transform and discrete wavelet transform. 2016 IEEE International Conference on Power and Energy (PECon) 2016, 311 -316.
AMA StyleNur Afifah Yusoff, Muzamir Isa, Haziah Hamid, Mohd. Rafi Adzman, Mohamad Nur Khairul Hafizi Rohani, Chang Yii Chai, Nurul Nadiah Ayop, Chai Chang Yii. Denoising technique for partial discharge signal : A comparison performance between artificial neural network, fast fourier transform and discrete wavelet transform. 2016 IEEE International Conference on Power and Energy (PECon). 2016; ():311-316.
Chicago/Turabian StyleNur Afifah Yusoff; Muzamir Isa; Haziah Hamid; Mohd. Rafi Adzman; Mohamad Nur Khairul Hafizi Rohani; Chang Yii Chai; Nurul Nadiah Ayop; Chai Chang Yii. 2016. "Denoising technique for partial discharge signal : A comparison performance between artificial neural network, fast fourier transform and discrete wavelet transform." 2016 IEEE International Conference on Power and Energy (PECon) , no. : 311-316.
Insulation failure has been identified as one of the main reasons for transformer breakdown. As one the most important assets in the high voltage system, the loss of a power transformer will cause significant effects to consumers and on the system. The condition of the insulation can directly be correlated to the presence of Partial discharge (PD). Therefore, the ability to accurately detect and analyse the information from PD could be the answer to avoid catastrophic breakdown. On top of that, the capability to pinpoint the location of the PD source would enable swift preventive action to be taken. Several methods have been researched and developed in those two areas. This paper will discuss such techniques. Included in the discussion is an introduction to some less conventional techniques such as optical and ionising emission detection.
Azharudin Mukhtaruddin; Muzamir Isa; Mohd Rafi Adzman; Syed Idris Syed Hasan; Muhamad Nur Khairul Hafizi Rohani; Chai Chang Yii. Techniques on partial discharge detection and location determination in power transformer. 2016 3rd International Conference on Electronic Design (ICED) 2016, 537 -542.
AMA StyleAzharudin Mukhtaruddin, Muzamir Isa, Mohd Rafi Adzman, Syed Idris Syed Hasan, Muhamad Nur Khairul Hafizi Rohani, Chai Chang Yii. Techniques on partial discharge detection and location determination in power transformer. 2016 3rd International Conference on Electronic Design (ICED). 2016; ():537-542.
Chicago/Turabian StyleAzharudin Mukhtaruddin; Muzamir Isa; Mohd Rafi Adzman; Syed Idris Syed Hasan; Muhamad Nur Khairul Hafizi Rohani; Chai Chang Yii. 2016. "Techniques on partial discharge detection and location determination in power transformer." 2016 3rd International Conference on Electronic Design (ICED) , no. : 537-542.
In this paper, a series of investigations on sensitivity and bandwidth for four types of Rogowski coil (RC) sensors was demonstrated. The proposed RC sensor design using acrylonitrile butadiene styrene material carries the advantages, such as lighter weight, robust, and higher temperature resistance. The prototype development first was carried out with the assistance of Solidwork 3D computer aided design software and MakerBot 2X 3D printer. Subsequently, the sensors were modeled and simulated using electromagnetic transient program-alternative transient program software environment based on the lumped parameter identification. A single-end measuring technique was used to locate the PD signal on the three-phase medium voltage underground cross-link polyethylene insulated power cable with a 240-mm 2 nominal area copper conductor. In order to verify the results achieved from the simulation, an experiment was carried out. This experiment was repeated concurrently for each design of the RC sensors. In order to achieve the best PD detection, the precise selection for the best sensor is paramount. In this case, the results indicated that certain geometrical shape performed better with regard to the detection of the PD signal.
Mohamad Nur Khairul Hafizi Rohani; Chai Chang Yii; Muzamir Isa; Syed Idris Syed Hassan; Baharuddin Ismail; Mohd Rafi Adzman; Muhammad Shafiq. Geometrical Shapes Impact on the Performance of ABS-Based Coreless Inductive Sensors for PD Measurement in HV Power Cables. IEEE Sensors Journal 2016, 16, 6625 -6632.
AMA StyleMohamad Nur Khairul Hafizi Rohani, Chai Chang Yii, Muzamir Isa, Syed Idris Syed Hassan, Baharuddin Ismail, Mohd Rafi Adzman, Muhammad Shafiq. Geometrical Shapes Impact on the Performance of ABS-Based Coreless Inductive Sensors for PD Measurement in HV Power Cables. IEEE Sensors Journal. 2016; 16 (17):6625-6632.
Chicago/Turabian StyleMohamad Nur Khairul Hafizi Rohani; Chai Chang Yii; Muzamir Isa; Syed Idris Syed Hassan; Baharuddin Ismail; Mohd Rafi Adzman; Muhammad Shafiq. 2016. "Geometrical Shapes Impact on the Performance of ABS-Based Coreless Inductive Sensors for PD Measurement in HV Power Cables." IEEE Sensors Journal 16, no. 17: 6625-6632.
The main reasons for installation of power quality meters in distribution transformer substations are power quality monitoring and global evolution of electrical network towards the ‘smart grid’. In case that all measurements from the meters are properly synchronised and centralised, new possibilities of control or evaluation of the network are enabled. This contribution proposes the possibility for an earth fault localisation with the aid of synchronised data recorded on the low-voltage side of the medium voltage/low voltage transformers in compensated neutral distribution networks which are equipped with auxiliary resistor for short-time increasing of the active part of the fault current. The described method uses voltage sags evoked by connecting of the auxiliary resistor for locating the faulty section. The proposed method is tested with the help of numerical model which presents a part of the distribution network.
David Topolanek; Matti Lehtonen; Mohd Rafi Adzman; Petr Toman. Earth fault location based on evaluation of voltage sag at secondary side of medium voltage/low voltage transformers. IET Generation, Transmission & Distribution 2015, 9, 2069 -2077.
AMA StyleDavid Topolanek, Matti Lehtonen, Mohd Rafi Adzman, Petr Toman. Earth fault location based on evaluation of voltage sag at secondary side of medium voltage/low voltage transformers. IET Generation, Transmission & Distribution. 2015; 9 (14):2069-2077.
Chicago/Turabian StyleDavid Topolanek; Matti Lehtonen; Mohd Rafi Adzman; Petr Toman. 2015. "Earth fault location based on evaluation of voltage sag at secondary side of medium voltage/low voltage transformers." IET Generation, Transmission & Distribution 9, no. 14: 2069-2077.
Most of electrical power utilities in the world are required to ensure that electrical energy requirement from the customer is served smoothly in accordance to the respective policy of the country. Despite serving the power demands of the country, the power utility has also to ensure that the electrical power is generated within minimal cost. Thus, the total demand must be appropriately shared among the generating units with an objective to minimize the total generation cost for the system in order to satisfy the economic operation of the system. Economic dispatch is a procedure to determine the electrical power to be generated by the committed generating units in a power system so that the total generation cost of the system is minimized, while satisfying the load demand simultaneously. This paper presents the economic power dispatch problems solved using Ant Colony Optimization (ACO) technique. ACO is a meta-heuristic approach for solving hard combinatorial optimization problems. In this study, the proposed technique was tested using the standard IEEE 26-Bus RTS and the results revealed that the proposed technique has the merit in achieving optimal solution for addressing the problems. Comparative studies with other optimization technique namely the artificial immune system (AIS) were also conducted in order to highlight the strength of the proposed technique.
Ismail Musirin; Nur Hazima Faezaa Ismail; Mohd. Rozely Kalil; Muhammad Khayat Idris; Titik Khawa Abdul Rahman; Mohd Rafi Adzman. Ant Colony Optimization (ACO) Technique in Economic Power Dispatch Problems. Lecture Notes in Electrical Engineering 2009, 191 -203.
AMA StyleIsmail Musirin, Nur Hazima Faezaa Ismail, Mohd. Rozely Kalil, Muhammad Khayat Idris, Titik Khawa Abdul Rahman, Mohd Rafi Adzman. Ant Colony Optimization (ACO) Technique in Economic Power Dispatch Problems. Lecture Notes in Electrical Engineering. 2009; ():191-203.
Chicago/Turabian StyleIsmail Musirin; Nur Hazima Faezaa Ismail; Mohd. Rozely Kalil; Muhammad Khayat Idris; Titik Khawa Abdul Rahman; Mohd Rafi Adzman. 2009. "Ant Colony Optimization (ACO) Technique in Economic Power Dispatch Problems." Lecture Notes in Electrical Engineering , no. : 191-203.