European Journal of Electrical Engineering and Computer Science

Journal Information
EISSN : 2506-9853
Published by: Europa Publishing (10.24018)
Total articles ≅ 207
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B. I. Bakare, V. E. Idigo, S. U. Nnebe
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 1-9; https://doi.org/10.24018/ejece.2021.5.6.366

Abstract:
This paper seeks to present the Interference Management for the Coexistence of DTTV and LTE Systems within the proposed digital dividend band in Nigeria. The study focused on LTE Down-link (DL) signal from the nearest cell site interfering with the Digital Terrestrial Television (DTTV) fixed outdoor receiving antenna in Port Harcourt, Nigeria. The qualitative signal analysis of the DTTV systems is essential as DTTV system cannot start to operate in the newly formed frequency band without the evaluation of the possible harmful influence of the coexisting systems. This research work investigated the Compatibility of the two systems and the Probability of interference of Channel 17 (490MHz) and Channel 51 (693MHz) when DTTV and LTE systems coexist within the proposed Digital Dividend band. A test-bed approach method was adopted for the generation of the required simulation data. Star Time transmitting Station in Port Harcourt and Smile LTE 4G Communication LTE Base Station (eNBs) Network also in Port Harcourt were adopted as the Victim Link Transmitter (VLT) and Interfering Link Transmitter (ILT) respectively. Data was obtained, analyzed, and evaluated. It was observed from the simulation result that the probability of interference is a function of the separation distance between ILT and VLR. The Compatibility analysis result shows that the resulting C/I is above the protection criteria (19dB), that is there’s a minimal rate of interference. Hence, the interference issue can be managed when the two systems coexist in700MHz band. It was also established that DTTV channel 51 suffers more interference when compared with DTTV channel 17 for the same separation distance. The study recommended the minimum protection distance approach (Interference Avoidance method) as the interference management techniques when DTTV and LTE systems coexist in the proposed digital dividend (700MHz) band in Nigeria.
B. Shoban Babu, Prince Patel
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 1-3; https://doi.org/10.24018/ejece.2021.5.5.354

Abstract:
As we all know, the Internet has altered everything, and the Internet of Things has given us hope for a bright future of the Internet with Machine-to-Machine (M2M) connectivity. This review study demonstrated that smart systems based on the Internet of Things are feasible and economical to build (IoT). In the field of healthcare, the Internet of Things has made significant progress. This article examines how the Internet of Things (IoT) is revolutionising the healthcare industry by giving huge healthcare advantages to humanity through accessible and practical healthcare solutions specially during the hard coronavirus situation around the world. The purpose of this study is to address the function of IoT in smart hospitals, as well as its importance in dealing with pandemics. Various smart gadgets that can provide a variety of features, such as adequate monitoring of high-risk patients, tracking their bio-metric measurements, and gathering real-time data, can be used to serve community-specific demands during pandemic spread. We've also looked into other plans that can detect unforeseen events utilising a variety of sensors and display the information gathered on an LED display. The results of observational studies have indicated a high level of agreement with the hypothetical claims.
Prakash Kanade, Jai Prakash Prasad, Sunay Kanade
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 4-9; https://doi.org/10.24018/ejece.2021.5.5.355

Abstract:
Notwithstanding adding to the presentation of imaginative innovations and arising business openings in numerous business sectors, improvements in innovation have since brought down labor force requests and working expenses. Likewise, the nature of administrations offered has been upgraded. In this way, as a key empowering innovation for a wide assortment of medical care applications, particularly for the older and handicapped, the Internet of Things (IoT) has as of late acquired extraordinary footing. While IoT-based advancements have started to help the old and incapacitated in numerous parts of their lives and occupations, and IoT helps support the nature of living for the old and crippled, the volume of IoT information produced has risen essentially and surpassed assumptions. An expected option for following their wellbeing status is to make a brilliant wheelchair-based wellbeing checking framework, since it is satisfactory for a more extensive assortment of watchers and, in contrast to wearable gadgets, doesn't need a great deal of support. Shrewd wheelchairs center on the versatility of the unit, yet in addition on observing the patient's prosperity. The point of the current work is to fabricate a shrewd detecting wheelchair through the establishment of sensors inside its structures. The innovation grasped is the Internet of Things, where sensors screen the heartbeat and blood oxygen levels, measure them through implanted frameworks, and move them to the cloud to initiate a trigger in case of any anomaly. The made trigger can be as a SMS or email.
Fredrick Nkado, Franklin Nkado, Ifedayo Oladeji,
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 39-46; https://doi.org/10.24018/ejece.2021.5.5.361

Abstract:
The increasing number of electricity consumers results in power quality problems in the distribution system. Solar photovoltaic integrated unified power quality conditioner (UPQC-PV) is a widely adopted device that can improve a distribution system's voltage and current quality. This paper presents an optimal design and performance analysis of a unified power quality conditioner integrated with a double-stage solar photovoltaic system (UPQC-PV). A technique based on sequence component detection (SCD) and unit vector template generation (UVTG) is proposed for the UPQC-PV control. Using a SCD technique, the fundamental active component of the distorted load current is estimated, which is used to generate a reference signal for shunt compensator control. The UPQC-PV consists of shunt and series compensators; the shunt compensator eliminates the harmonic currents produced by nonlinear loads and extracts the active power generated by the solar PV array. In addition, the series compensator compensates for the grid side power quality problems such as voltage sags/swells. Hence, the proposed system can simultaneously perform clean energy generation and power quality improvement. The UPQC-PV system performance is evaluated in MATLAB-Simulink software under different grid conditions.
Shinji Kawakura, Masayuki Hirafuji, Ryosuke Shibasaki
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 58-63; https://doi.org/10.24018/ejece.2021.5.5.364

Abstract:
Our research group focuses on creating various application systems of these systems tends to focus on agricultural (agri-) advancement and security issues. First, we monitor agriculture and related environments (e.g., rice fields, meadows, and gardens) and obtain environmental agri-information (e.g., temperature, moisture, and the quality of soil) over extended periods. To do so, we use an existing Japanese high-performance/low-cost field server (FS) system, which operates sensor units uniformly. Furthermore, we develop and implement a blockchain and Twitter-based record sharing system connecting with the FS for the benefit of traditional agri-researchers, workers, and their respective managers. In regard to the study results, presenting the accuracy data quantitatively is difficult; we are unable to show the success and error rates for the systems’ data transmitting and receiving, nor the examination operation time. We believe the holistic system holds the potential to improve not only agri-businesses but also agri-skills and overall security levels.
Jose Luis Calderon Osorno, Edmundo Rene Duran Camarillo, Silvestre Ascencion Garcia Sanchez
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 47-49; https://doi.org/10.24018/ejece.2021.5.5.363

Abstract:
Derived from the pandemic COVID19 that we are currently experiencing as a security measure it is very important that people wear face masks especially in public places, to try to minimize the spread of the SARS-Cov2 virus; this Project consisted in the detection of faces with and without face masks applying Deep learning neural networks, it was developed by using Python and the libraries TensorFlow and OpenCV which allowed to apply learning rules to artificial vision systems. The above would allow the installation of artificial vision systems in public places soon to warn and invite people to wear face masks when detected by the system.
Adel Elgammal, Tagore Ramlal
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 24-31; https://doi.org/10.24018/ejece.2021.5.5.359

Abstract:
Alternative renewable energy structures for example hydro turbine generators can be utilised to replace or rise in the efficiency of energy distribution infrastructure in remote communities. A small hydro turbine linked to grid divides the load into current and electricity. The voltage amplitude in the energy distribution structure will be changed as a result of the power quality problem, and this will have a direct influence on the electric load. This study introduces the PV-STATCOM, a novel smart inverter that can be used to control a solar inverter as dynamic reactive power compensator (DRPC). The recommended photovoltaic STATCOM can be utilised to offer voltage regulate for serious structure demands. For the night, the whole inverter capacity is utilised for STATCOM operations. The smart inverter temporarily disables its real power generating function during a large system outage throughout the day and makes its whole inverter capacity accessible for STATCOM operation. This research examines the stability of the voltage control structure`s excitation in the Micro Hydro Power Plant. The MOPSO algorithm may be used to regulate the Permanent Magnet Synchronous Machine and control the voltage on the direct current linked part of system. The system will most probably be unstable if the exact definition of system parameters is uncertain. To present the parameter specifications for the stable structure, the DC-link control system is modelled, theoretically assessed, and simulated. This paper proposes the use of a particle swarm optimization centred SVC controller for reactive power optimization and adjustment in a separated hybrid system with micro hydro and wind diesel. The small linear signal model of the hybrid micro hydro Diesel wind model is investigated under various loading scenarios. The SVC controller is compared to the GA-based controller and optimised using the PSO approach. The purpose of study is to employ STATCOM for reactive power compensation in order to increase energy structure's dependable operating limit. It also tries to reduce voltage variations caused by renewable energy sources' variable nature. To obtain an acceptable outcome, the proper modification of Proportional–Integral parameters in STATCOM is conducted consequentially centred on BFA and GA. The STATCOM control circuit's PI controller's settings have been optimised. This article discusses the optimization and adjustment strategies for PID controllers in a STATCOM based circuit for PV-Micro hydro hybrid system voltage stability.
Simon Hissem, Mamadou Lamine Doumbia
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 32-38; https://doi.org/10.24018/ejece.2021.5.5.360

Abstract:
In this paper, the general model for an infinite LC ladder network using Fibonacci wave functions that were applied to lossless transmission lines will be extended to transmission lines including losses. The general model that was derived from a first order system transfer function representing a simple RC or RL circuit will be used to model and analyze transmission lines presenting losses. The LC ladder network model can be applied to any order for each inductor current with its parasitic rc resistor and for each capacitor voltage with its parasitic rL resistor. The extension of the proposed general model to transmission lines with losses is subject to Heaviside condition for both resistors rc and rL .
Innocent E. Okoloko
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 64-68; https://doi.org/10.24018/ejece.2021.5.5.358

Abstract:
In this paper an analysis of discrete-time convolution is performed to prove that the convolution sum is polynomial multiplication without carry, whether the sequences are finite or not, by using several examples to compare the results computed using the existing approaches to the polynomial multiplication approach presented here. In the design and analysis of signals and systems the concept of convolution is very important. While software tools are available for calculating convolution, for proper understanding it is important to learn now to calculate it by hand. To this end, several popular methods are available. The idea that the convolution sum is indeed polynomial multiplication without carry is demonstrated in this paper. The concept is further extended to deconvolution, N-point circular convolution and the Z-transform approach.
M. A. Oyegoke, Y. O. Olasoji
European Journal of Electrical Engineering and Computer Science, Volume 5, pp 50-57; https://doi.org/10.24018/ejece.2021.5.5.362

Abstract:
Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation (MCM) scheme that plays a significant role in digital wireless communication. As a result of its high data rate capability and immunity to multipath fading effect, among others, OFDM remains an ideal technology for 5G communication systems and beyond. Unfortunately, a major drawback of this technology is the high peak-to-average power ratio (PAPR). Nevertheless, many techniques for reducing PAPR have been proposed in the past to address this problem. However, all the techniques previously used have limitations such as high computational complexity, data rate loss, high signal distortion, increase in bandwidth, increase in transmit power, and memory requirements. In this paper, a hybrid technique that combines Zadoff-Chu Transform (ZCT) precoding and Partial Transmit Sequence (PTS) for reducing high PAPR in OFDM signals is presented. To reduce the data rate loss and computational complexity in PTS when a large subblock is used, a Zadoff-Chu precoding is applied to OFDM symbols to precode the symbol before applying PTS with a fewer number of subblocks. An OFDM model was developed where ZCT and PTS techniques were implemented. The performance of the hybrid model was analyzed using Power Spectral Density (PSD), Complementary Cumulative Distribution Function (CCDF), and Bit Error Rate (BER). The simulation result indicates that the hybrid ZCT-PTS provides a better result than using either Zadoff-Chu precoding technique or Partial Transmit Sequence technique separately. A PAPR of 4.2 dB and BER of 3dB is achieved for hybrid ZCT-PTS. The hybrid technique provides a better system performance when compared with Conventional OFDM systems.
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