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Transformer Wireless Monitoring System Using Arduino/XBEE
Amevi Acakpovi,
Chiedozie Odazie,
Issah Babatunde Majeed,
George Eduful,
Nana Yaw Asabere
Issue:
Volume 8, Issue 1, January 2019
Pages:
1-10
Received:
28 November 2018
Accepted:
21 December 2018
Published:
31 January 2019
Abstract: Distribution transformers are generally provided with advanced control measures that ensure their operation and safety at a high reliability because their failure usually leads to long power outage, increase maintenance cost and unreliable provision of electricity to customers. Despite the protection measures that accompany a distribution transformer, there is still a need to provide extra remote monitoring systems to increase the reliability of operation and the confidence of instantaneous fault reporting. This paper deals with the design and construction of automatic monitoring system for power transformer parameters. An Arduino board coupled with XBEE module were programmed to enable the monitoring of voltage, current and temperature on a typical power transformer. The system was implemented and tested successfully. Results showed that the voltage versus temperature as well as current versus voltage characteristic obtained, were closed to datasheet specifications and therefore confirming the reliability of the proposed design. This system is therefore recommended as an additional protection that should be added to Power Transformers.
Abstract: Distribution transformers are generally provided with advanced control measures that ensure their operation and safety at a high reliability because their failure usually leads to long power outage, increase maintenance cost and unreliable provision of electricity to customers. Despite the protection measures that accompany a distribution transform...
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Performance Analysis of Installed Solar PV System Using Homer in Tanzania: A Case Study of Zanzibar and Arusha
Mohammed Haji,
Eugene Park,
Thomas Kivevele
Issue:
Volume 8, Issue 1, January 2019
Pages:
11-22
Received:
4 November 2018
Accepted:
7 February 2019
Published:
6 March 2019
Abstract: This study reflects two photovoltaic (PV) power generations, at Karume Institute of Science and Technology (KIST) - Zanzibar and The Nelson Mandela African Institution of Science and Technology (NM-AIST) - Arusha in Tanzania. The output data sets from each site were verified for possible PV simulation of different operational scenarios to obtain the optimum design configuration. The HOMER software was used to analyze the entire operation of the system. The effect of the accuracy of the photovoltaic integration was determined by analysis of different operational behaviors of the simulated PV levels. Furthermore, the overall performance of the station per site was analyzed for technical, economic and environmental constraints as well as their comparative cost-benefit analysis. The study finds that there is a high sensitivity in the demand for the load (i.e. load growth) whose system performance is characterized with minimum: total net present cost (NPC) of $474,745 and $29,169, feed in tariffs, levelized cost of energy (LCOE) of $1.06/kWh and $0.0118/kWh, total energy output and renewable fraction of 15% and 22% for KIST and NM-AIST respectively, thus support the use of photovoltaic power sources in the generation of energy than their counterpart alternatives because of the best technical performance and is less dependent on other external sources of energy, and simultaneously has good economic and environmental performance
Abstract: This study reflects two photovoltaic (PV) power generations, at Karume Institute of Science and Technology (KIST) - Zanzibar and The Nelson Mandela African Institution of Science and Technology (NM-AIST) - Arusha in Tanzania. The output data sets from each site were verified for possible PV simulation of different operational scenarios to obtain th...
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Research on Path Planning of Substation X-Robot
Guangchao Hao,
Ronghai Liu,
Shuting Wan
Issue:
Volume 8, Issue 1, January 2019
Pages:
23-32
Received:
27 December 2018
Accepted:
24 January 2019
Published:
12 March 2019
Abstract: In this paper, according to the environment of the robot in the substation, firstly, the D-H mathematical modeling of the UR10 manipulator is built and the forward and inverse kinematics of the UR10 manipulator are solved by studying the basic knowledge of the manipulator. Secondly, aiming at the problems existing in the traditional artificial potential field method, the improved artificial potential field method is studied and the principle that the link of the manipulator can not collide with obstacles is studied. The collision detection algorithm is added and the collision detection of cylindrical bounding box is designed. Then according to the starting position of the end of the manipulator and the position of the obstacle, the moving path of the end of the manipulator is determined. Finally, the improved artificial potential field method is used in MATLAB to simulate the moving path of the UR10 manipulator, and field tests are carried out to verify the effectiveness of the improved artificial potential field method and collision detection of cylindrical bounding box in the path planning. These methods can make the robot reach the designated detection position perfectly in the process of walking in the substation and also avoid the collision between the manipulator and the obstacle (substation electrical equipment and building, etc.). The application of X-ray detection equipment in substation becomes more intelligent.
Abstract: In this paper, according to the environment of the robot in the substation, firstly, the D-H mathematical modeling of the UR10 manipulator is built and the forward and inverse kinematics of the UR10 manipulator are solved by studying the basic knowledge of the manipulator. Secondly, aiming at the problems existing in the traditional artificial pote...
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Design and Control of Single-Phase-to-Three-Phase PFC for Cereals Grinding System Fed by PV-Battery Microgrid
Moustapha Diop,
Mouhamadou Thiam,
Alphousseyni Ndiaye,
Samba Gueye,
Lamine Thiaw
Issue:
Volume 8, Issue 1, January 2019
Pages:
33-41
Received:
31 December 2018
Accepted:
28 January 2019
Published:
15 March 2019
Abstract: PV/Battery microgrids hold the most promising solution for providing electricity to remote areas. However, the power quality of these microgrids is vulnerable to nonlinear loads and power electronics components, often necessary to power certain systems such as the cereal grinding systems. These grinding systems consist of mills locally designed driven by induction motors. Given the constraints of microgrids and the structure of the cereal grinding system, a single-phase-to-three-phase Power Factor Corrector with two control strategies is proposed. The PFC control is used to control the power quality of the microgrid but also to regulate the DC-link voltage. The field oriented control strategy is used to improve the system efficiency. The performance of the power converter and control strategies are evaluated in simulation under Simulink environment. Results have verified the effectiveness of the proposed controls with a low current Total Harmonic Distortion, a near-unity power-factor and a significant efficiency improvement of cereals grinding system.
Abstract: PV/Battery microgrids hold the most promising solution for providing electricity to remote areas. However, the power quality of these microgrids is vulnerable to nonlinear loads and power electronics components, often necessary to power certain systems such as the cereal grinding systems. These grinding systems consist of mills locally designed dri...
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