3 research outputs found
Performance Evaluation of Edge-Based Segmentation Methods for Electrical Tree Image Analysis in High-Voltage Experiments
Get PDFThis research evaluates the performance of edge-based segmentation methods in analysing two-dimensional (2D) electrical tree images obtained during high-voltage (HV) electrical tree experiments. Non-uniform illumination in 2D optical images poses challenges in accurately extracting and measuring the original treeing image. Edge segmentation emerges as a promising solution to precisely distinguish tree structures from the insulation background within the image. Cross-linked polyethylene (XLPE) samples were subjected to HV stress for real-time propagation observation, followed by extraction and segmentation of treeing images using edge-based operators. The findings emphasize the superiority of the Roberts edge operator in accurately detecting electrical trees, showcasing the highest average accuracy of 97.01% and 99.58% specificity, while also demonstrating relatively high sensitivity. Moreover, the Roberts method provide much precisely measures the propagation length and width than conventional measurement method, closely approximating the actual tree measurements. This research emphasizes the significance of accurate segmentation for investigating electrical tree propagation in XLPE materials and provides recommendations for future research, especially in HV XLPE cable manufacturing
Investigating The Power Quality Improvement On Laboratories Equipment Base On Voltage And Current Analysis
No full textAfter four years the Faculty of Engineering Technology was opened,the equipment/computer have installed for doing the experiment in laboratories beginning faulty.The
technician was informed by the vendors that the equipment/computer was break down due to power supply. The vendor told that it was not occurring at any places that they have installed and suspected the power supply from the main supply was having a problem.General observation showed that the PC (Personal Computer) commissioning and installation is following the standard procedure.The location of the PC,the humidity and temperature all are within the standard operating condition.The power supply from the main distribution board is protected via a standard circuit breaker and additionally protected via Automatic Voltage Regulator (AVR).Nevertheless,having these protections does not mean that the power supply is safe to be used with any equipment.According to the yearly equipment maintenance report of the faculty,the breakdown of the PC usually on the power supply block of the PC.This symptom can only mean either incoming power supply is giving unsafe power or power supply blockโs is not reliable.In this project, the electrical parameters of the incoming power supply will be monitored using the PM1000F with Flicker & Harmonic Distortion measurement meter.Important parameters that are expected to be extracted from this
monitoring process are current,voltage,frequency and total harmonic distortion.A backup monitoring equipment will be set up as well as nearby laboratory for references and comparison analysis.Initial monitoring that was done recently showed that during early morning the voltage has dropped about 10%.Even though it is normal,the occurrence of the event may increase the stress to the power supply block.The result or data will be analysed to find out the real problems with the equipment as mentioned by the technician and the vendor
Kajian perancangan gunatanah kawasan sumber makanan negara
Get PDFThe agriculture sector contributes to the economic growth of the nation, covering not only agriculture but also fisheries and livestock. More importantly, the agriculture sector is crucial in relation to its importance of food security. Thus, the inception report of the study will lead towards the data analysis before coming out with its conclusive proposals in the forms of guidelines, initiatives and development control. The main sector namely land use will become the catalyst of the spatial analysis that will support the others sectors, such as infrastructure, environment, governance and others
