IEEE C37.101-2006 REDLINE
Withdrawn
IEEE Guide for Generator Ground Protection
English
11-15-2007
04-12-2022
1 Overview
1.1 Scope
1.2 Purpose
1.3 Description of the guide
2 Normative references
3 Definitions, acronyms, and abbreviations
3.1 Definitions
3.2 Acronyms and abbreviations
4 Summary of protection schemes
5 Generator connections
5.1 Example use of Table 1
6 Generator grounding methods
6.1 Method I - Effective high-resistance ground with a
distribution transformer
6.2 Method II - High-resistance ground with a neutral ground
resistor
6.3 Method III - Low-resistance ground with a neutral ground
resistor
6.4 Method IV - Low-reactance ground with a neutral ground
reactor
6.5 Method V - Resonant ground with a ground fault neutralizer
6.6 Method VI - High-resistance ground with a delta-grounded-wye
transformer
6.7 Method VII - Medium-resistance ground with a
delta-grounded-wye transformer
6.8 Method VIII - Ungrounded
6.9 Method IX - Hybrid ground (switching low resistance to
high resistance)
7 Protective schemes
7.1 Scheme 1 - Ground overvoltage (complete shutdown)
7.2 Scheme 2 - Ground overvoltage (permissive shutdown)
7.3 Scheme 3 - Ground overvoltage exceed rated relay voltage
(alarm and time-delay shutdown)
7.4 Scheme 4 - Ground overvoltage exceed rated relay voltage
(alarm)
7.5 Scheme 5S - Start-up ground overvoltage (complete shutdown)
7.6 Scheme 6 - Ground fault neutralizer (alarm and time-delay
shutdown)
7.7 Scheme 7 - Grounded wye-broken-delta VTs with ground
overvoltage (complete shutdown)
7.8 Scheme 8S - Start-up grounded wye-broken-delta VTs with
ground overvoltage (complete shutdown)
7.9 Scheme 9 - Secondary-connected CT, time-delay ground
overcurrent (complete shutdown)
7.10 Scheme 10 - Primary-connected CT, time-delay ground
overcurrent (complete shutdown)
7.11 Scheme 11 - Instantaneous ground overcurrent (alarm
and/or complete shutdown)
7.12 Scheme 12 - Generator leads ground overcurrent (complete
shutdown)
7.13 Scheme 13 - Three-wire generator leads with window CT,
instantaneous ground overcurrent (complete shutdown)
7.14 Scheme 14 - Four-wire generator leads with window CT,
instantaneous ground overcurrent (complete shutdown)
7.15 Scheme 15 - Generator percentage differential (complete
shutdown)
7.16 Scheme 16 - Current-polarized directional overcurrent relay
7.17 Scheme 17 - Generator percentage differential relay on
delta-connected generator (complete shutdown)
7.18 Scheme 18 - 100% stator winding ground protection schemes
7.19 Scheme 19 - Alternate stator winding protection with
high-impedance relays
7.20 Scheme 20 - Generator neutral overcurrent protection for
an accidental solid ground fault
7.21 Scheme 21 - Directional ground fault protection for
high-resistance ground bus connected generators (multi-ground)
7.22 Scheme 22 - Hybrid ground protection for high-resistance
grounded bused generator and ungrounded distribution system
8 Miscellaneous considerations
9 Protective device function numbers
Annex A (informative) Stator ground protection for a
high-resistance grounded generator
Annex B (informative) Ground protection example to determine
the percent coverage of a high-impedance differential relay
Annex C (informative) Glossary
Annex D (informative) Bibliography
The guide is intended to assist protection engineers in applying relays and relaying schemes for protectionagainst stator ground faults on various generator grounding schemes.
| Committee |
Power System Relaying and Control
|
| DevelopmentNote |
Supersedes IEEE DRAFT C37.101. (12/2007)
|
| DocumentType |
Standard
|
| ISBN |
978-0-7381-5248-6
|
| Pages |
91
|
| PublisherName |
Institute of Electrical & Electronics Engineers
|
| Status |
Withdrawn
|
| Supersedes |
| IEEE DRAFT C37.95 : D6 99 | DRAFT GUIDE FOR PROTECTIVE RELAYING OF UTILITY CONSUMER INTERCONNECTIONS |
| IEEE 1665 : 2009 | GUIDE FOR THE REWIND OF SYNCHRONOUS GENERATORS, 50 HZ AND 60 HZ, RATED 1 MVA AND ABOVE |
| IEEE DRAFT C37.96 : D5 99 | DRAFT GUIDE FOR AC MOTOR PROTECTION |
| IEEE DRAFT 1147 : D8 2005 | GUIDE FOR THE REHABILITATION OF HYDROELECTRIC POWER PLANTS |
| IEEE C37.96-2012 | IEEE Guide for AC Motor Protection |
| IEEE C57.143-2012 | IEEE Guide for Application for Monitoring Equipment to Liquid-Immersed Transformers and Components |
| IEEE DRAFT C62.92.2 : 1999 | DRAFT GUIDE FOR THE APPLICATION OF NEUTRAL GROUNDING IN ELECTRICAL UTILITY SYSTEMS, PART 2 - GROUNDING OF SYNCHRONOUS GENERATOR SYSTEMS |
| I.S. EN ISO 14224:2016 | PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - COLLECTION AND EXCHANGE OF RELIABILITY AND MAINTENANCE DATA FOR EQUIPMENT (ISO 14224:2016) |
| IEEE DRAFT C37.102 : D8 2006 | AC GENERATOR PROTECTION |
| IEEE C37.102-2006 REDLINE | IEEE Guide for AC Generator Protection |
| IEEE 242-2001 | IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (IEEE Buff Book) (Color Book® Series) |
| ISO 14224:2016 | Petroleum, petrochemical and natural gas industries — Collection and exchange of reliability and maintenance data for equipment |
| IEEE DRAFT 67 : D5 2005 | GUIDE FOR THE OPERATION AND MAINTENANCE OF TURBINE GENERATORS |
| IEEE C37.10-2011 REDLINE | IEEE Guide for Investigation, Analysis, and Reporting of Power Circuit Breaker Failures |
| IEEE 1129-2014 | IEEE Guide for Online Monitoring of Large Synchronous Generators (10 MVA and Above) |
| IEEE C37.12-2008 REDLINE | IEEE Guide for Specifications of High-Voltage Circuit Breakers (over 1000 Volts) |
| IEEE C62.92.2-1989 | IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part II - Grounding of Synchronous Generator Systems |
| IEEE DRAFT 1010 : D10 2005 | GUIDE FOR CONTROL OF HYDROELECTRIC POWER PLANTS |
| IEEE 1147-2005 | IEEE Guide for the Rehabilitation of Hydroelectric Power Plants |
| IEEE C37.246-2017 | IEEE Guide for Protection Systems of Transmission-to-Generation Interconnections |
| IEEE C37.11-2014 | IEEE Standard Requirements for Electrical Control for AC High-Voltage (>1000 V) Circuit Breakers |
| IEEE C62.92.3-2012 | IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part III -Generator Auxiliary Systems |
| BS EN ISO 14224:2016 | Petroleum, petrochemical and natural gas industries. Collection and exchange of reliability and maintenance data for equipment |
| IEEE 142-2007 | IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems (Color Book® series) |
| IEEE C62.92.2-1989 | IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part II - Grounding of Synchronous Generator Systems |
| IEEE C37.102-2006 REDLINE | IEEE Guide for AC Generator Protection |
| IEEE 32-1972 | IEEE Standard Requirements, Terminology, and Test Procedures for Neutral Grounding Devices |
| ANSI C50.10 : 1990 | ROTATING ELECTRICAL MACHINERY - SYNCHRONOUS MACHINES |
| IEEE C37.2-1996 | IEEE Standard Electrical Power System Device Function Numbers and Contact Designations |
| IEEE C37.102-1995 | IEEE Guide for AC Generator Protection |
| IEEE 142 : 2007 | GROUNDING OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS |
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