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Development of an intelligent system for dc current detection and classification of underground cables based on variation of magnetic flux density and distance measurement / Amirul Fahmi Fadzin

Development of an intelligent system for dc current detection and classification of underground cables based
Banyak penyelidikan yang telah dilakukan untuk menambah-baik kaedah pengesanan dan pengukuran arus untuk kabel penghantaran bawah tanah. Penggunaan transformer arus dan arus pirau adalah contoh kaedah pengukuran arus yang popular pada masa ini tetapi mempunyai beberapa kelemahan. Kelemahan yang paling utama adalah sistem bekalan kuasa terpaksa dimatikan sewaktu berlakunya gangguan operasi disebabkan oleh kerosakkan transformer arus untuk memberi jalan kepada kerja-kerja penyellenggaraan. Hal ini akan menyebabkan pembaziran berlaku dari segi tenaga kerja manusia, kos penyelenggaraan dan kuasa yang dijanakan kerana hanya kerosakkan yang kecil seperti transformer arus atau arus pirau akan menyebabkan operasi sistem terpaksa dihentikan. Objektif projek ini adalah untuk membangunkan satu sistem pengesanan arus terus pada kabel penghantaran bawah tanah berpandukan kepada ketidktentuan nilai kepekatan medan fluks magnet yang dihasilkan oleh konduktor yang membawa arus. Data untuk fasa latihan dan pengujian dalam projek dalam projek adalah dihasilkan dari Hukum Biot Savart. Rangkaian yang digunakan adalah Perceptron Berbilang Lapisan (MLP) yang menggunakan tiga jenis algoritma latihan yang berbeza iaitu BP, BR dan LM. Setiap jenis algoritma latihan adalah dibandingkan untuk menentukan algoritma latihan terbaik untk diaplikasikan kepada sistem. Keputusan projek ini menunjukkan algoritma latihan terbaik adalah LM dengan peratus keberkesanan sebanyak 94.58%. Oleh itu, satu sistem pintar direkabentuk untuk mengkelaskan nilai arus terus untuk kabel penghantaran bawah tanah. Projek ini berjaya menbuktikan bahawa nilai arus dapat diukur dengan mengesan medan magnet yang terhasil oleh konduktor dengan meletakkan sensor Hall di celah-celah slot toroid. Selain menawarkan kaedah alternatif untuk mengesan dan mengukur arus, sistem yang dicadangkan menawarkan beberapa kelebihan berbanding sistem pengesanan arus konvensional iaitu kadar prestasi yang tinggi dan sistem yang mesra pengguna. _________________________________________________________________________________________ A lot of researches have been done to improve the method and technology of detecting and measuring the current for underground transmission lines cables. The most popular current sensing methods nowadays are by using current transformers or current shunts but unfortunately, these methods have several drawbacks. The main problem arises here is the system need to be isolated or completely turned off for maintenance works if there are any fault condition to the current measurement device. These inefficiencies lead to a waste of manpower, energy and cost involved. The objective of this project is to develop a detection system for a DC current of underground cables based on the variation of the magnetic flux density produced by the current-carrying conductors. In this project, the training and testing data are generated using Biot Savart’s Law. Multilayered Perceptron network with three different algorithms which are Resilient Back-propagation (BP), Bayesian Regularization (BR), and Levenberg Marquardt (LM) algorithms are developed and compared to find the best performance training algorithm. This study proves that MLP network with LM training algorithm achieve the best performance as compared to the BP and BR algorithms with 94.58% accuracy. Hence, an intelligent system is developed for the classification of DC current for underground cables. The design of the hardware is also included which is the use of the linear ratiometric Hall effect sensor for the sensor circuit. The sensor circuit is build on the ware board and it proves that the current can be detected over the variation of magnetic field induced by the conductor by applying the sensor in the slotted toroid. The proposed system provides several advantages in term of high accuracies, user-friendly system as well as it offers an alternative way of DC current detection.
Contributor(s):
Amirul Fahmi Fadzin - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
transmission; lines cables.; slotted toroid
First presented to the public:
3/1/2007
Original Publication Date:
9/13/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 79
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-09-13 15:06:22.853
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Nor Hayati Ismail

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Development of an intelligent system for dc current detection and classification of underground cables based on variation of magnetic flux density and distance measurement / Amirul Fahmi Fadzin1 2018-09-13 15:06:22.853