Analisis Penambahan Teknologi Baterai pada Diesel Electric Multiple Unit (DEMU)

Romal Hadi Setyawan; Muhammad Nizam; Mufti Reza Aulia Putra

doi:10.35447/jitekh.v14i1.1356

Authors

Romal Hadi Setyawan Program Studi Magister Teknik Elektro, Fakultas Teknik, Universitas Sebelas Maret, Surakarta
Muhammad Nizam Program Studi Magister Teknik Elektro, Fakultas Teknik, Universitas Sebelas Maret, Surakarta
Mufti Reza Aulia Putra Program Studi Magister Teknik Elektro, Fakultas Teknik, Universitas Sebelas Maret, Surakarta

DOI:

https://doi.org/10.35447/jitekh.v14i1.1356

Keywords:

Diesel Electric Multiple Unit (DEMU), Battery Energy Storage System (BESS), Regenerative Braking, Traction Performance, CO₂ Emission

Abstract

This study analyzes the impact of integrating a 70 kWh Lithium Titanate Oxide (LTO)-based Battery Energy Storage System (BESS) into the traction system of a Diesel Electric Multiple Unit (DEMU) operating on the Bandung–Cimahi–Padalarang corridor. Two primary problems are addressed: (1) regenerative braking energy wasted as heat in brake resistors, and (2) limited diesel engine power ramp-up response during acceleration. The methodology applies technical analysis based on real operational data loggers at 0.5-second resolution and numerical power flow simulation on a 1,500 VDC link across 12 daily trip cycles. Results show that battery integration increases initial traction effort by 18.1% (82.75 kN → 97.77 kN), reduces 0–25 km/h acceleration time by 26.7% (24.54 s → 17.98 s), and improves notch-P7 acceleration by 39.3%. Fuel savings reach 4.99 liters/cycle (7.14%), equivalent to 21,856 liters/year. Recovered regenerative energy is 6.48 kWh/cycle. CO₂ reductions total 59,228 kg/year, equivalent to planting 2,692 trees. Investment analysis yields a positive NPV of IDR 192,064,475 with a 2.35-year payback period, within the 3.42-year battery service life.

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