Keandalan Houseload Operation Pembangkit Listrik Tenaga Uap (PLTU) Supercritical Dengan Rekayasa Sistem Condensate Injection

Wicaksana, Herman Dwicandra (2026) Keandalan Houseload Operation Pembangkit Listrik Tenaga Uap (PLTU) Supercritical Dengan Rekayasa Sistem Condensate Injection. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada saat ini pembangkit berkapasitas besar di Indonesia masih mengandalkan PLTU Batubara, dimana untuk rasio elektrifikasi, PLTU batu bara memegang peranan penting sebesar 50,52% (sumber; statistic kementrian ESDM tahun2022). Untuk menjaga kehandalan system jaringan kelistrikan, setiap pembangkit listrik harus mampu untuk berhouseload operation, ketika terjadi gangguan pada system jaringan transmisi semua pembangkit harus dapat tetap beroperasi untuk mensuply auxiliary power sendiri. Sehingga ketika gangguan pada sistem transmisi telah normal maka semua pembangkit diharapkan dapat langsung sinkron kembali untuk memenuhi kebutuhan daya sistem, hal ini diperkuat dengan adanya peraturan menteri ESDM no 20 tahun 2020 yang mengharuskan setiap pembangkit harus mampu beroperasi dengan mode houseload selama 40 menit. Penelitian ini akan membahas kegagalan pengoperasian mode houseload yang belum dapat memenuhi kriteria penerimaan yang telah ditentukan pada Pembangkit Listrik Tenaga Uap (PLTU) supercritical berkapasitas 315 MW. Faktor penyebab kegagalan pengujian adalah tripping pompa Boiler Feed Pump (BFP) yang disebabkan oleh nilai NPSH yang menyentuh ambang batas set point minimum, penelitian ini dilakukan pada kondisi pengujian aktual dengan rekayasa sistem air kondensat (condensate injection) pada inlet pompa BFP. Hasil pengujian penelitian ini adalah dengan menurunkan temperatur inlet pompa BFP rata-rata 7 0C dengan menambahkan laju injeksi air kondensate rata-rata 32 t/h pada kondisi houseload operasi dapat menjaga rata-rata NPSH margin pompa BFP sebesar 21,4 m, serta unit PLTU dapat berhouseload operation selama 139 menit yang selanjutnya siap untuk sinkron kembali dengan jaringan transmisi.
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Currently, large-capacity power plants in Indonesia still rely on coal-fired steam power plants (PLTU), where, in terms of electrification ratio, coal-fired power plants hold an important role of 50.52% (source: Ministry of Energy and Mineral Resources statistics, 2022). To maintain the reliability of the electrical grid system, every power plant must be capable of houseload operation when a disturbance occurs in the transmission network system, all power plants must be able to continue operating to supply their own auxiliary power. Thus, once the disturbance in the transmission system has been resolved, all power plants are expected to be able to immediately resynchronize to meet the system's power demand. This is reinforced by the Ministerial Regulation of Energy and Mineral Resources No. 20 of 2020, which requires every power plant to be capable of operating in houseload mode for 40 minutes. This study discusses the failure of houseload mode operation to meet the predetermined acceptance criteria at a 315 MW supercritical coal-fired steam power plant (PLTU). The factor causing the test failure was the tripping of the Boiler Feed Pump (BFP), caused by the NPSH value reaching the minimum set point threshold. This research was conducted under actual testing conditions with engineering modifications to the condensate water system (condensate injection) at the BFP pump inlet. The results of this study show that by lowering the BFP pump inlet temperature by an average of 7°C through the addition of an average condensate water injection rate of 32 t/h during houseload operation conditions, the average NPSH margin of the BFP pump could be maintained at 21.4 m, and the PLTU unit was able to sustain houseload operation for 139 minutes, after which it was ready to resynchronize with the grid transmission.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Houseload Operation, Condensate Injection, PLTU, FCB
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Herman Dwicandra Wicaksana
Date Deposited:	01 Aug 2026 03:02
Last Modified:	01 Aug 2026 03:02
URI:	http://repository.its.ac.id/id/eprint/141327

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