Perancangan Sistem Pengendalian Steam Turbin-Generator Berbasis Model Predictive Control (MPC) di PT Geo Dipa Energi Unit Dieng Jawa Tengah - Design Of Steam Turbine Generator Control System Based On Model Predictive Control (MPC) At PT GEO DIPA Energi Unit Dieng Central Java

Kurniarum, Dhita (2012) Perancangan Sistem Pengendalian Steam Turbin-Generator Berbasis Model Predictive Control (MPC) di PT Geo Dipa Energi Unit Dieng Jawa Tengah - Design Of Steam Turbine Generator Control System Based On Model Predictive Control (MPC) At PT GEO DIPA Energi Unit Dieng Central Java. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Geothermal power plant (GPP) merupakan suatu pembangkit listrik yang memanfaatkan panas bumi sebagai sumber energinya. Dalam suatu GPP, steam turbin dan generator merupakan faktor penting yang menentukan performansi sistem secara keseluruhan. Untuk itu, diperlukan suatu sistem pengendali yang mampu menjaga kecepatan putaran turbin dan tegangan terminal generator tetap sesuai set point. Dalam tugas akhir ini dirancang sistem pengendalian steam turbin dan generator berbasis Model Predictive Control (MPC). Pengendalian seperti ini merupakan jenis pengendalian multivariabel dengan menggunakan struktur cascade. Kecepatan putaran turbin dikontrol dengan memanipulasi flowrate steam melalui governing system, sedangkan tegangan terminal dikontrol dengan memanipulasi arus exciter pada excitation system. Plant yang dimodelkan adalah steam turbin dan generator yang ada di PT Geo Dipa Energi. Performansi yang ditunjukkan oleh MPC dibandingkan dengan performansi sistem pengendali yang saat ini terpasang di real plant (PI controller). Berdasarkan pada respon yang ditunjukkan sewaktu simulasi, pengendali MPC memberikan respon yang lebih baik dibandingkan dengan PI controller. Kecepatan putaran steam turbin mempunyai nilai Mp 0,1%, Ts 13 s dan Ess 3,33x10-4 %. Tegangan generator mempunyai Ts 0,3 s dan Ess 0,33%. Sedangkan, respon power active yang dihasilkan mempunyai Mp 100%, Ts 0,6 s dan 0,33%. ======================================================================================================================== Geothermal power plant (GPP) is a generator using the heat power as the energy. The performance of the steam turbine and generator in GPP is a crucial factor deciding system performance thoroughly. To maintain both steam turbine and generator, a control system with capability of maintaining the turbine’s rotation velocity and generator’s terminal voltage to stick to the set point is required. A control system of steam turbine and generator based on Model Predictive Control (MPC) is designed in this final project. This controller is a multivariable with cascade. The velocity of turbine rotation is controlled through manipulation of flowrate steam via governing system, while terminal voltage is controlled by manipulation of exciter current on excitation system. The modelled plant is a steam turbine and generator at PT Geo Dipa Energy. The performance shown by MPC is compared with the existing control system at the real plant (PI Controller). According to the response shown in simulation, MPC controller provides better response than PI Controller. The velocity of turbine rotation has Mp 0,1%, Ts 13 s and Ess 3,33x10-4 %. The terminal voltage has Ts 0,3 s dan Ess 0,33%. Then, power active has Mp 100%, Ts 0,6 s and 0,33%.

Item Type: Thesis (Undergraduate)
Additional Information: RSF 629.8 Kur p
Uncontrolled Keywords: excitation system, generator, governing system, MPC, steam turbin, excitation system, generator, governing system, MPC, steam turbine.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7 Turbogenerators. Steam-turbines
Divisions: Faculty of Industrial Technology > Physics Engineering
Depositing User: ansi aflacha
Date Deposited: 15 Nov 2019 03:47
Last Modified: 15 Nov 2019 03:47
URI: http://repository.its.ac.id/id/eprint/71819

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