Yin, Chhao Rath (2026) Optimal Relay Coordination in Kampong Cham Radial System Based on Adaptive Protection Scheme Using Modified Grasshopper Optimization Algorithm. Masters thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 6022241126-Master_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
6022241126-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (9MB) | Request a copy |
Abstract
Relai arus lebih umumnya digunakan dalam proteksi sistem tenaga, dan koordinasi yang tepat diperlukan untuk memastikan proteksi yang andal. Namun, dalam sistem distribusi radial dengan beberapa distribution generators (DG), koordinasi relai menjadi lebih sulit karena besaran dan arah arus gangguan berubah di bawah kondisi operasi yang berbeda. Jika perubahan ini tidak dipertimbangkan dengan benar, kesalahan koordinasi relai dan pemadaman yang tidak perlu dapat terjadi. Directional Overcurrent Relay (DOCR) digunakan untuk meningkatkan selektivitas, keandalan, dan efisiensi dengan mempertimbangkan arah dan besaran arus gangguan. Makalah ini memperkenalkan skema proteksi adaptif untuk koordinasi DOCR yang optimal dalam sistem distribusi radial Kampong Cham yang terintegrasi dengan DG. Secara khusus, skema proteksi adaptif digunakan untuk mendapatkan koordinasi relai yang optimal di bawah topologi sistem yang berbeda. Modified Grasshopper Optimization Algorithm (MGOA) diusulkan untuk mengoptimalkan Time Multiplier Setting (TMS), bertujuan untuk meminimalkan total waktu operasi relai sambil menghormati batasan Coordination Time Interval (CTI). Studi ini menerapkan empat skenario sistem yang berbeda, yang melibatkan unit DG yang dipasang di ujung saluran distribusi. Dibandingkan dengan GOA konvensional, MGOA yang diusulkan mengurangi jumlah iterasi yang dibutuhkan, menunjukkan peningkatan yang konsisten dan signifikan dalam kecepatan konvergensi.
=====================================================================================================================================
Overcurrent relays are generally used in power system protection, and proper coordination is needed to ensure reliable protection. However, in radial distribution systems with multiple distributed generators (DGs), relay coordination becomes more difficult since fault current magnitude and direction change under different operating conditions. If these changes are not properly considered, relay miscoordination and unnecessary outages may occur. Directional overcurrent relays (DOCRs) are used to improved selectivity, reliability, and efficiency with consideration of the direction and magnitude of fault currents. This paper introduces an adaptive protection scheme for optimal coordination DOCRs in the Kampong Cham radial distribution system integrated with DGs. In particular, an adaptive protection scheme is used to obtain optimal relay coordination under different system topologies. A modified grasshopper optimization algorithm (MGOA) is proposed to optimize the time multiplier setting (TMS), aiming to minimize the total operating time of relays while respecting the relay coordination time interval (CTI) constraints. The study applies four different scenarios of the system, which involves DG units installed at the end of the distribution lines. In comparison with conventional GOA, the proposed MGOA reduces the required iterations, demonstrating a consistent and significant improvement in convergence speed.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Directional Overcurrent Relay, Skema Proteksi Adaptif, Modified Grasshopper Optimization Algorithm, Sistem Radial, Directional Overcurrent Relay, Adaptive Protection Scheme, Modified Grasshopper Optimization Algorithm, Radial System |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures. |
| Divisions: | Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis |
| Depositing User: | Chhao Rath Yin |
| Date Deposited: | 29 Jul 2026 01:24 |
| Last Modified: | 29 Jul 2026 01:24 |
| URI: | http://repository.its.ac.id/id/eprint/136562 |
Actions (login required)
 |
View Item |