NDLI: Upgrading Outdated Rectifier Control Systems

Content Provider	IEEE Xplore Digital Library
Author	Tambe, S. Koester, P. Lambert, E.
Copyright Year	2006
Description	Author affiliation: ABB Inc., Saint Laurent, Que. (Tambe, S.; Koester, P.; Lambert, E.)
Abstract	Rectifier control systems supplied in the 1970's and 80's were based upon analog technology. These systems typically have failures which result in longer down times since components are either not available, are obsolete or need to be repaired. Tolerance degradation of these components contributes to problems such as loss of regulation accuracy or the malfunctioning gate firing circuits leading to potentially heavy production losses. This makes it difficult to run the plant economically and is unsafe for operating people. Modern control systems are quite comprehensive, which poses a great challenge when considering an upgrade for old control systems. An upgrade must result in more reliable and efficient operation. Time available for designing, manufacturing and execution is typically very short. Necessary logic, interlocks, etc. to match current operation philosophy has to be achieved. When conventional maintenance procedures are not adequate to improve the availability, safety, productivity and efficiency of a plant beyond a certain level, then a technical assessment of the plant needs to be carried out to determine ways for upgrade or replacement. This paper presents a case study for control replacements for a thyristor plant and for a diode plant, illustrating needs and challenges, including: incorporating centralized control; improvement in measurement accuracy to increase production; monitoring and recording of important parameters such as current, flows, temperatures, etc.; high speed response capabilities to protect the system; suitable firing circuitry for thyristor plants; event recording, listing and printing all events that occurred, hence providing a fault diagnostics tool; elimination of possible human errors in operation and maintenance; high immunity against electro magnetic noise; and suitability for existing plant topology
Starting Page	1
Ending Page	5
File Size	5053273
Page Count	5
File Format	PDF
ISBN	1424405580
ISSN	00903507
DOI	10.1109/PCICON.2006.359704
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rectifiers Control systems Centralized control Thyristors Degradation Circuits Production Manufacturing Logic Maintenance Diode Rectifier Rectifier Control Systems Control Upgrade Challenges Thyristor Rectifier
Content Type	Text
Resource Type	Article
Subject	Fuel Technology Energy Engineering and Power Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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