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ITS » Undergraduate Theses » Teknik Fisika Ekstensi S1
Posted by reini@its.ac.id at 31/01/2012 11:26:35  •  1548 Views


PERANCANGAN SISTEM PENGENDALIAN BERTINGKAT PADA STEAM DRUM PT INDONESIA POWER UBP SUB UNIT PERAK-GRATI

DESIGN CASECADE CONTROL SYSTEM LEVEL 3 ELEMENTS WITH PID ON STEAM DRUM PT INDONESIA POWER UBP SUB UNIT PERAK-GRATI

Author :
WAHYUDIANTO, EKO  ( 2409105004 )




ABSTRAK

Steam Drum adalah salah satu bagian dari boiler yang berfungsi untuk memisahkan uap dari air setelah proses pemanasan yang terjadi dalam boiler yang didasarkan atas perbedaan berat jenis. Sedangkan level air dalam steam drum merupakan faktor dominan untuk mendapatkan steam yang berkualitas. Level air dipertahankan pada ketinggian NWL Normally Water Level. Bila steam drum mengalami kondisi low water level atau high water level yang cukup besar maka sistem akan mengalami kondisi trip yaitu kondisi dimana sistem berhenti beroperasi hingga perlu dilakukan waktu untuk restart awal untuk memulai proses. Kondisi high level merupakan kondisi yang sangat berbahaya bagi proses selanjutnya dimana masukan turbin yang berupa steam akan tercampur dengan air dari kelebihan level air di Steam Drum carry over. Dalam penelitian ini dilakukan perancangan dan simulasi sistem pengendalian level dengan menggunakan sistem pengendalian bertingkat cascade dengan untuk menentukan parameter pengendali adalah level air flow feed water dan flow steam untuk mengendalikan laju aliran feed water. Dari hasil penelitian terlihat bahwa respon sistem dengan menggunakan kendali PID dengan metode Ziegler-Nichols lebih baik dibanding dengan menggunakan kendali PI berdasarkan perancangan sistem pada beberapa pengujian dengan max overshoot 6714 dan settling time 156 detik.


ABSTRACT

Steam Drum is one part of the boiler that serves to separate the steam from the water after the heating process that occurs in the boiler which is based on differences in specific gravity. While the water level in the steam drum is the dominant factor to get the steam quality. Water level is maintained at a height of NWL Normally Water Level. When the steam drum experience conditions of low water levels or high water level that is big enough then the system will experience a trip condition a condition in which the system stops operating until the necessary time to restart early to start the process. High-level conditions are extremely hazardous conditions for further processing where input in the form of steam turbine will be mixed with water from the excess water level in the Steam Drum carry over. In this study the design and control system-level simulation using multilevel control systems cascade the controller is to determine the parameters of the water level flow and feed water flow rate of steam to control the flow of feed water. From the results of studies it appears that the system response using PID control with Ziegler-Nichols method is better than using a PI control system design based on some testing with max 67.14 overshoot and settling time 156 seconds.



KeywordsSteam Drum; Level; Ziegler-Nichols
 
Subject:  Steam
Contributor
  1. Ir.Mochammad Ilyas HS
Date Create: 15/08/2011
Type: Text
Format: PDF
Language: Indonesian
Identifier: ITS-Undergraduate-3100011044922
Collection ID: 3100011044922
Call Number: RSF 621.1 Wah p


Source
Undergraduate Thesis, Physics Engineering, RSF 621.1 Wah p, 2012

Coverage
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Rights
Copyright @2011 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




[ Download - Open Access ]

  1.  ITS-Undergraduate-17538-Abstract_id.pdf - 430 KB
  2.  ITS-Undergraduate-17538-Abstract_en.pdf - 428 KB
  3.  ITS-Undergraduate-17538-Conclusion.pdf - 690 KB
  4.  ITS-Undergraduate-17538-Paper.pdf - 511 KB




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