Publications
Simulation and Modeling of Data Transmission Process in Boreholes Using Intelligent Drill Pipe for a Laboratory Experiment
Dec 15, 2024Journal Modeling
Publisher MDPI
DOI https://www.mdpi.com/2673-3951/5/4/102
Issue 5
Volume 4
Currently, most oil and gas wells are drilled by continuously transmitting downhole measured information (directional and geological information) in real-time to the surface to monitor and steer the well along a pre-defined path. The intelligent drill pipe method can transmit data over longer distances and at a higher rate than other methods, such as mud pulse telemetry, acoustic telemetry, and electromagnetic telemetry. Nevertheless, it is expensive and requires boosters along the drill string. In the available literature, academic research rarely addresses the data transmission process in boreholes using intelligent drill pipes. Furthermore, there is a need for an effective and validated model to study various controllable parameters to enhance the efficiency of the intelligent drill pipe telemetry without the need to develop several physical lab or field prototypes. This paper presents the development of a model based on MATLAB Simulink to simulate the process of data transmission in boreholes utilizing intelligent drill pipes. Laboratory experimental prototype measurements have been used to test the model’s effectiveness. A good correlation is found between the measured lab data and the model’s predictions for the signals transmitted contactless through intelligent drill pipes with a correlation coefficient (R²) above 0.9. This model can enhance data transmission efficiency via intelligent drill pipes, study different concepts, and eliminate the need to develop several unnecessarily expensive and time-consuming physical lab prototypes.
Dynamic Reconfiguration of PV Array under Partial Shading Condition by Using Automatic Switching
Jul 1, 2023Journal International Journal of Electrical and Electronic Engineering & Telecommunications
Publisher Engineering and Technology Publishing
DOI doi: 10.18178/ijeetc.12.4.272-278
Issue 4
Volume 12
The mismatching effect caused by partial shade is one of the critical problems in the operation of photovoltaic (PV) arrays, it can cause large losses in the power produced by the PV system. Power losses due to Partial Shading (PS) for a particular operating situation may be controlled by altering the PV array's scheme connection. For that reason, this paper presents an Automatic Switch Block (ASB) based on dynamic relays without using an algorithm to control the connection between PV panels to reduce the effect of partial shading and provide the ability of scaling. The Simulation results showed that the proposed module has a high ability and efficiency in mitigating and reducing the effect of partial shade on solar panel arrays by automatically changing the electrical connection between the panels compared with Total Cross-Tied (TCT), Futoshiki Puzzle Pattern (FPP), Sudoku and L-Shape Algorithm. Moreover, the proposed method was tested in SIMULINK/MATLAB environment for different shading patterns and achieved an improvement in Maximum Power Point Tracking (MPPT) by about 12% as compared with L-Shape, more than 30% compared to TCT, and about 15% for other methods.