POWER LOSS ANALYSIS OF A 1.5 MW THREE-PHASE SYNCHRONOUS GENERATOR UNIT 1 AT THE LOGAWA BASEH 1 MINI HYDROPOWER PLANT.

Fadhlan Hafizh Firmansyah; Randi Adzin Murdiantoro; Rifqi Wibowo; Fachruroji

doi:10.58436/jeepa.v5i2.2556

Authors

Fadhlan Hafizh Firmansyah Universitas Peradaban
Randi Adzin Murdiantoro Universitas Peradaban
Rifqi Wibowo Universitas Peradaban
Fachruroji Universitas Peradaban

DOI:

https://doi.org/10.58436/jeepa.v5i2.2556

Keywords:

Generator Sinkron, Rugi Daya, Pembangkit Listrik Tenaga Minihidro

Abstract

This research was conducted during an Industrial Internship at PT Sumarah Energi with the objective of analyzing power losses in a 1.5 megawatt synchronous generator Unit 1 at the Logawa Baseh 1 Mini Hydropower Plant. The generator functioned to convert mechanical energy from the turbine into electrical energy; however, power losses occurred during operation, reducing the effective output power. The analysis was carried out by collecting generator specification data, stator current, excitation current, and daily load data during August 2025. The data were quantitatively analyzed through calculations of copper losses, core losses, mechanical losses, and stray load losses. The results showed that copper losses were the largest component of power losses, ranging from 15.12 to 21.25 kilowatts and increasing with higher stator current. Core losses of 9.19 kilowatts and mechanical losses of 6.12 kilowatts remained constant, while stray load losses contributed the smallest portion, ranging from 0.15 to 0.21 kilowatts. The total power losses ranged from 30.58 to 36.77 kilowatts and were mainly influenced by load variations caused by fluctuations in river water discharge. This research demonstrated that daily load variations significantly affected total power losses, particularly copper losses, while core and mechanical losses remained stable in synchronous generators used in mini hydropower plants.

References

Perawati, “Karakteristik Generator Sinkron Yang Beban Berat Dan Tidak Konstan,” vol. 2, hal. 115–120, 2017.

M. P. U. D. P. R. R. Indonesia, Peraturan Menteri Pekerjaan Umum Dan Perumahan Rakyat Republik Indonesia Nomor 09/Prt/M/2016 Tentang Tata Cara Pelaksanaan Kerjasama Pemerintah Dan Badan Usaha Dalam Pemanfaatan Infrastruktur Sumber Daya Air Untuk Pembangunan Pembangkit Listrik Tenaga Air. 2016.

H. H. T. Lukas, Daniel Rohi, “Studi Kinerja Pembangkit Listrik Tenaga Air (PLTA) di Daerah Aliran Sungai (DAS) Brantas,” J. Tek. Elektro, vol. 10, no. 1, hal. 17–23, 2017, doi: 10.9744/jte.10.1.17-23.

D. Supena, R. M. Yunus, E. Dewi J, dan H. Budiman, “Analisis Sistem Kerja Generator Ac (Sinkron) Di Plta Parakan Kondang Sumedang,” Reka Elkomika, hal. 80–85, 2018.

C. Gao, Y. Sun, W. Zheng, dan W. Wang, “Transient power equalization control strategy of virtual synchronous generator in isolated island microgrid with heterogeneous power supply,” Sci. Rep., 2023, doi: 10.1038/s41598-023-39121-6.

H. Satya Aliputa, S. Marsudi, dan M. Taufiq, “Studi Perencanaan Pembangkit Listrik Tenaga Air Run of River (PLTA ROR) Baliem Kabupaten Jayawijaya,” Fak. Tek. Univ. Brawijaya, no. 0341, 2016.

M. D. Bejarano, A. Sordo-Ward, I. Gabriel-Martin, dan L. Garrote, “Tradeoff between economic and environmental costs and benefits of hydropower production at run-of-river-diversion schemes under different environmental flows scenarios,” J. Hydrol., vol. 572, no. March, hal. 790–804, 2019, doi: 10.1016/j.jhydrol.2019.03.048.

Z. Muna, Syahputra, Fauzan, dan Julianto, “Studi Perubahan Beban Terhadap Tugi-Rugi Daya Outpur Generator Sinkron Tiga Phase 20 MW Pada Generator Turbin Gas Unit 2 Pada PT Pupuk Iskandar Muda,” J. Tektro, vol. 7, no. 1, hal. 112–117, 2023.

A. N. Azhiimah, S. Muslim, dan K. Khusnul, “Kajian Kritis Terhadap Beberapa Studi Kelayakan Potensi Pembangkit Listrik Tenaga Mikro Hidro (Pltmh) Di Indonesia,” Rang Tek. J., vol. 2, no. 2, hal. 337–347, 2019.

H. F. Wibowo, P. Jannus, dan B. Nainggolan, “Analisis Efisiensi dan Rugi-rugi Daya Pada Generator Terhadap Kinerja Generator PLTMG SPBG Klender,” hal. 1652–1660, 2024.

F. Likadja, A. S. Sampeallo, dan C. R. D. N. R. Amaral, “Perencanaan Pembangkit Listrik Tenaga Mikro Hidro (Pltmh) Memanfaatkan Outlet Kondensor Pltu Ii Ntt Di Desa Bolok Kecamatan Kupang Barat, Kabupaten Kupang,” J. Media Elektro, vol. VIII, no. 2, hal. 155–163, 2019, doi: 10.35508/jme.v0i0.1858.

M. Farhan, “Pengaruh Pembebanan Terhadap Arus Eksitasi Generator Unit 2 Pltmh Curug,” J. Simetrik, vol. 11, no. 1, hal. 398–403, 2021, doi: 10.31959/js.v11i1.653.

Arzul, “Analisis Rugi Daya Akibat Partial Discharge pada Generator Turbin Gas di North Duri Cogeneration Plant,” JUTIN J. Tek. Ind. Terintegrasi, vol. 6, no. 1, hal. 95–106, 2023.

A. Nurdin, A. Azis, dan R. A. Rozal, “Peranan Automatic Voltage Regulator Sebagai Pengendali Tegangan Generator Sinkron,” J. Ampere, vol. 3, no. 1, hal. 163–176, 2018, doi: 10.31851/ampere.v3i1.2144.

A. Tanjung, Z. Maulana, dan H. Yuvendius, “Analisis Generator Sinkron Unit 2 Akibat Overheating Di Pembangkit Listrik Tenaga Gas MPP Balai Pungut,” SainETIn (Jurnal Sain, Energi, Teknol. Ind., vol. 7, no. 2, hal. 64–73, 2023, doi: 10.31849/sainetin.vxix.xxx.

R. Ichsan, Yuslan Basir, dan Y. W. D. Utari, “Analisis Fluktuasi Beban Terhadap Efisiensi Generator Sinkron di PT. Pembangkit Listrik Palembang Jaya,” J. Ampere, vol. 6, no. 2, hal. 91, 2021.

A. Zulhakim, Y. S. Handayani, dan I. Priyadi, “Pengaruh Sistem Eksitasi Terhadap Generator Sinkron Tiga Fasa Di Unit 1 PT. PLN Indonesia Power ULPL TA Musi,” Teknosia, vol. 17, no. 1, hal. 1–12, 2023, doi: 10.33369/teknosia.v17i1.28708.

R. Azharny, “Analisa Perbandingan Efisiensi Generator Sinkron Unit 1 Dan 2 Di Plta Sipansihaporas,” 2021.

D. Masyari et al., “Analisa Perubahan Beban Terhadap Kinerja Pada Generator Unit 7 Di Pt Pln Nusantara Power,” J. TEKTRO, vol. 8, no. 2, hal. 230–234, 2024.

R. Fadilah, S. Yahya, dan S. M. Ilman, “Analisis Pengaruh Pembebanan Terhadap Efisiensi Generator 55 MW Unit 3 di PLN Indonesia Power UBP Kamojang,” Pros. Ind. Res. Work. Natl. Semin., vol. 15, no. 1, hal. 139–147, 2024, doi: 10.35313/irwns.v15i1.6206.

Z. A. Angelina, “Analisa Pengaruh Perubahan Beban Terhadap Efisiensi Generator PLTMG Gunung Belah,” 2022. [Daring]. Tersedia pada: https://repository.pnj.ac.id/id/eprint/9617/

M. Noer, “Analisa Pengaruh Pembebanan Terhadap Efisiensi Generator Di Pltg Borang Dengan Menggunakan Software Matlab,” J. Ampere, vol. 2, no. 2, hal. 103, 2017, doi: 10.31851/ampere.v2i2.1774.

A. Ardiansyah, R. Syahputra, dan Maimun, “Studi Pengaruh Perubahan Beban Terhadap Efisiensi Generator Sinkron 3 Fasa 2.470 KVA Pada PLTMG Di PT. Pertamina Hulu Rokan Field Rantau,” vol. 8, no. 1, hal. 47–53, 2024.

R. C. Pamungkas, “Studi Sistem Eksitasi Pada Generator Sinkron Pembangkit Listrik Tenaga Uap Unit 3 Dan 4 Di Pjb Up Gresik,” hal. 1–8, 2018.

N. A. Kartono, C. G. Indra Partha, W. G. Ariastina, I. A. D. Giriantari, I. N. Satya Kumara, dan I. W. Sukerayasa, “Analisis Pengaruh Variasi Debit Air Terhadap Kecepatan Putaran Turbin Crossflow Pada Pembangkit Listrik Tenaga Mikrohidro,” J. SPEKTRUM, vol. 10, no. 2, hal. 43, 2023, doi: 10.24843/spektrum.2023.v10.i02.p6.