Analisis Penerapan Single Pole Autoreclose Terhadap Jaringan 70 kV yang Memakai High Resistance Grounding

Ardi, Mochamad Ardi Arsuwenda (2026) Analisis Penerapan Single Pole Autoreclose Terhadap Jaringan 70 kV yang Memakai High Resistance Grounding. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gangguan satu fasa ke tanah merupakan jenis gangguan yang paling dominan pada jaringan transmisi 70 kV. Pada sistem transmisi 70 kV wilayah Malang, proses pemulihan gangguan masih menggunakan skema Three Pole Auto Reclose (TPAR). Kondisi tersebut berpotensi menurunkan kontinuitas penyaluran daya dan mempengaruhi kestabilan sistem. Penelitian ini bertujuan untuk menganalisis kelayakan penerapan Single Pole Auto Reclose (SPAR) pada jaringan transmisi 70 kV yang menggunakan sistem pentanahan High Resistance Grounding (HRG) dengan nilai tahanan netral 200 Ω. Penelitian dilakukan menggunakan perangkat lunak DIgSILENT PowerFactory dengan memodelkan kondisi aktual sistem 70 kV Malang. Evaluasi dilakukan melalui analisis aliran daya, Critical Clearing Time (CCT), secondary arc, Power Surge dan koordinasi proteksi terkait gangguan satu fasa ke tanah. Simulasi juga dilakukan dengan dua kategori operasi yaitu operasi normal dan operasi N-1 pada kondisi beban luar puncak (LWBP) dan beban puncak (WBP). Hasil analisis menyebutkan bahwa terdapat ruas yang tidak dapat di fungsikan SPAR dikarenakan terdapat hasil power surge yang besar terutama di dekat PLTA SGRH di GI SGRH. Sedangkan untuk hasil simulasi SPAR menunjukkan bahwa penerapan SPAR dapat diimplementasikan pada sebagian besar penghantar yang ditinjau tanpa menyebabkan kehilangan sinkronisasi generator. Analisis stabilitas sudut rotor menunjukkan deviasi sudut maksimum berada pada rentang 0,8° hingga 4,6° dengan karakteristik osilasi teredam pada seluruh skenario gangguan. Respon daya listrik generator juga menunjukkan osilasi teredam dan kembali menuju kondisi tunak setelah proses autoreclose. Analisis temporary tegangan lebih memperlihatkan kenaikan tegangan pada dua fasa sehat dengan nilai maksimum antara 1,43 p.u. hingga 1,75 p.u. akibat pengaruh sistem HRG selama kondisi satu fasa terbuka. Berdasarkan hasil analisis diatas, penerapan SPAR pada jaringan 70 kV Malang dinilai layak diterapkan pada penghantar yang memenuhi kriteria teknis. Implementasi SPAR mampu meningkatkan kontinuitas penyaluran tenaga listrik, mengurangi pemutusan tiga fasa yang tidak diperlukan, serta mempertahankan kestabilan sistem transmisi yang menggunakan High Resistance Grounding.
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Single-phase-to-ground faults are the most common type of fault on the 70 kV transmission. In the 70 kV transmission system in the Malang region, the fault recovery process still uses the Three-Pole Auto Reclose (TPAR) scheme. This situation has the potential to reduce power supply continuity and affect system stability. This study aims to analyze the feasibility of implementing Single-Pole Auto Reclose (SPAR) on the 70 kV transmission network, which uses a High Resistance Grounding (HRG) grounding system with a neutral resistance of 200 Ω. The study was conducted using DIgSILENT PowerFactory software, modeling the actual conditions of the 70 kV Malang system. The evaluation involved analyzing power flow, Critical Clearing Time (CCT), secondary arc, Power Surge, and protection coordination related to single-phase-to-ground faults. Simulations were also conducted with two operating categories: normal operation and N-1 operation under off-peak load (LWBP) and peak load (WBP) conditions. The analysis revealed that some sections could not be used for SPAR due to large power surges, particularly near the SGRH hydroelectric power plant at the SGGRH substation. Meanwhile, the SPAR simulation results indicated that SPAR implementation could be implemented on most of the conductors reviewed without causing loss of generator synchronization. Rotor angle stability analysis showed a maximum angular deviation in the range of 0.8° to 4.6°, with damped oscillation characteristics across all disturbance scenarios. The generator's electrical power response also exhibited damped oscillations, returning to steady state after autoreclose. Temporary overvoltage analysis revealed a voltage increase on the two healthy phases, with a maximum value between 1.43 p.u. and 1.75 p.u., due to the influence of the HRG system during an open-phase condition. Based on the analysis above, the implementation of SPAR on the 70 kV Malang network is deemed feasible for conductors that meet the technical criteria. The implementation of SPAR is able to increase the continuity of electric power distribution, reduce unnecessary three-phase disconnections, and maintain the stability of the transmission system that uses High Resistance Grounding.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	three pole autoreclose, jaringan transmisi 70 kV, pentanahan resistensi tinggi, single pole autoreclose. ===================================================================== Single-Pole Auto-Reclosing, High Resistance Grounding, Critical Clearing Time, Power Surge, Secondary Arc, Protection Coordination, DIgSILENT PowerFactory
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User:	Mochamad Ardi Arsuwenda
Date Deposited:	31 Jul 2026 07:26
Last Modified:	31 Jul 2026 07:26
URI:	http://repository.its.ac.id/id/eprint/140887

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