IEEE C37.106-2022

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IEEE Guide for Abnormal Frequency Protection for Power Generating Plants (Approved Draft)

Published By	Publication Date	Number of Pages
IEEE	2022

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Description

Revision Standard – Active. This guide has been prepared to assist the protection engineer in applying relays for the protection of generating plant equipment from damage caused by operation at abnormal frequencies including overexcitation.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.106™-2022 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
12	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
13	2. Normative references 3. Definitions, acronyms, and abbreviations 3.1 Definitions
15	3.2 Acronyms and abbreviations
16	4. Generator-transformer abnormal frequency capabilities and protection 4.1 General background 4.2 Generator overfrequency and underfrequency capabilities
18	4.3 Generator and transformer overexcitation capabilities
22	4.4 Generator and transformer V/Hz protection
27	5. Turbine abnormal frequency capabilities 5.1 Turbine overfrequency and underfrequency capabilities 5.2 Steam turbine overfrequency and underfrequency capabilities
31	5.3 Combustion turbine overfrequency and underfrequency capabilities
32	5.4 Combined-cycle unit overfrequency and underfrequency capabilities
33	5.5 Hydraulic turbine overfrequency, underfrequency, and overvoltage capabilities 6. Turbine abnormal frequency protection 6.1 Frequency protection methods
35	6.2 Load-shedding based underfrequency protection 6.3 Steam turbine underfrequency protection
37	6.4 Combustion turbine underfrequency protection
38	6.5 Combined-cycle installation underfrequency protection considerations 6.6 Hydraulic turbine underfrequency protection 7. Impact of abnormal frequencies on power plant auxiliaries 7.1 Power plant auxiliaries—underfrequency considerations
39	7.2 Auxiliary bus transfer issues 7.3 Nuclear plants—general background
41	8. System-wide issues
43	Annex A (informative) Steam/combustion turbine generator application example A.1 System Data
44	A.2 Overexcitation protection (24)
47	A.3 Abnormal frequency protection (81)
51	Annex B (informative) Hydraulic turbine generator application example
52	Annex C (informative) Applying a user-defined curve for V/Hz protection
53	Annex D (informative) Bibliography
57	Back cover