NDLI: Ensuring Availability of a Large Adjustable-Speed Drive for Process Gas Compressor Application Rated 11 kV 15.5 MW (20 778 hp)

Content Provider	IEEE Xplore Digital Library
Author	Endrejat, F. Hanna, R.A. Shultz, J.
Copyright Year	1972
Abstract	Voltage-source inverter (VSI) technology, suitable for synchronous-motor applications, now exists with high power ratings producing high output voltage (≥ 11 kV) with significant benefits over the widely used load-commutated-inverter drives. This paper covers an existing VSI technology applied for the first time at a higher operating voltage. This 15.5-MW 11-kV VSI adjustable-speed drive (ASD) installation is used to soft start three synchronous motors and speed control one of these for a process gas compressor application. Challenges faced during commissioning are described, and associated solutions are presented. A failure analysis of the ASD during commissioning is presented. An ASD design review was undertaken, which has resulted in an improved alternative to the conventional high-voltage busbar design. A protection-coordination study incorporating incoming switchgear and internal drive protection functions is presented. Improved protection schemes and settings are described to obtain faster coordinated fault clearance and improved ASD availability. This paper provides operating experience since the modified ASD has been placed in service in January 2006. Key recommendations are made to enhance the reliability, availability, and performance of medium-voltage drive systems. Also, suggestions are made for additions to the 2006 IEEE 1566 medium-voltage ASD standard.
Sponsorship	IEEE Industry Applications Society
Starting Page	1843
Ending Page	1849
Page Count	7
File Size	617714
File Format	PDF
ISSN	00939994
Volume Number	46
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Variable speed drives Protection Inverters Synchronous motors Availability Medium voltage Commutation Paper technology Velocity control Failure analysis voltage-source inverter (VSI) failure analysis high-power-rating adjustable-speed drive (ASD) medium voltage protection reliability
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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