IEEE 421.5-2016

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IEEE Recommended Practice for Excitation System Models for Power System Stability Studies

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IEEE	2016	207

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Description

Revision Standard – Active. Excitation system and power system stabilizer models suitable for use in large-scale system stability studies are presented. Important excitation limiters and supplementary controls are also included. The model structures presented are intended to facilitate the use of field test data as a means of obtaining model parameters. The models are, however, reduced order models and do not necessarily represent all of the control loops of any particular system. The models are valid for frequency deviations of ±5% from rated frequency and oscillation frequencies up to 3 Hz. These models would not normally be adequate for use in studies of subsynchronous resonance or other shaft torsional interaction behavior. Delayed protective and control features that may come into play in long-term dynamic performance studies are not represented. A sample set of data for each of the models, for at least one particular application, is provided.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 421.5™-2016 Front Cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
9	Introduction
10	Contents
14	1. Overview 1.1 Scope 1.2 Background
15	1.3 Limitations
16	1.4 Summary of changes and equivalence of models
19	2. Normative references 3. Definitions
20	4. Representation of synchronous machine excitation systems in power system studies
22	5. Synchronous machine terminal voltage transducer and current compensation models 5.1 Terminal voltage sensing time constant
23	5.2 Current compensation
26	6. Type DC—Direct current commutator rotating exciter 6.1 General
27	6.2 Type DC1A excitation system model 6.3 Type DC1C excitation system model
29	6.4 Type DC2A excitation system model 6.5 Type DC2C excitation system model
30	6.6 Type DC3A excitation system model
31	6.7 Type DC4B excitation system model 6.8 Type DC4C excitation system model
33	7. Type AC—Alternator supplied rectifier excitation systems 7.1 General
34	7.2 Type AC1A excitation system model 7.3 Type AC1C excitation system model
35	7.4 Type AC2A excitation system model 7.5 Type AC2C excitation system model
36	7.6 Type AC3A excitation system model
37	7.7 Type AC3C excitation system model 7.8 Type AC4A excitation system model
38	7.9 Type AC4C excitation system model 7.10 Type AC5A excitation system model
39	7.11 Type AC5C excitation system model 7.12 Type AC6A excitation system model 7.13 Type AC6C excitation system model
40	7.14 Type AC7B excitation system model
41	7.15 Type AC7C excitation system model
43	7.16 Type AC8B excitation system model 7.17 Type AC8C excitation system model
45	7.18 Type AC9C excitation system model
48	7.19 Type AC10C excitation system model
52	7.20 Type AC11C excitation system model
54	8. Type ST—Static excitation systems 8.1 General 8.2 Type ST1A excitation system model
55	8.3 Type ST1C excitation system model
57	8.4 Type ST2A excitation system model 8.5 Type ST2C excitation system model
58	8.6 Type ST3A excitation system model
59	8.7 Type ST3C excitation system model
60	8.8 Type ST4B excitation system model 8.9 Type ST4C excitation system model
61	8.10 Type ST5B excitation system model
62	8.11 Type ST5C excitation system model 8.12 Type ST6B excitation system model
63	8.13 Type ST6C excitation system model
65	8.14 Type ST7B excitation system model 8.15 Type ST7C excitation system model
67	8.16 Type ST8C excitation system model
68	8.17 Type ST9C excitation system model
69	8.18 Type ST10C excitation system model
72	9. Type PSS—Power system stabilizers 9.1 General
73	9.2 Type PSS1A power system stabilizer model 9.3 Type PSS2A power system stabilizer model
74	9.4 Type PSS2B power system stabilizer model 9.5 Type PSS2C power system stabilizer model
76	9.6 Type PSS3B power system stabilizer model 9.7 Type PSS3C power system stabilizer model
77	9.8 Type PSS4B power system stabilizer model 9.9 Type PSS4C power system stabilizer model
79	9.10 Type PSS5C power system stabilizer model 9.11 Type PSS6C power system stabilizer model
81	9.12 Type PSS7C power system stabilizer model
83	10. Type OEL—Overexcitation limiters 10.1 General 10.2 Field winding thermal capability
85	10.3 OEL types 10.4 Type OEL1B overexcitation limiter model
88	10.5 Type OEL2C overexcitation limiter model
90	10.6 Type OEL3C overexcitation limiter model
91	10.7 Type OEL4C overexcitation limiter model
92	10.8 Type OEL5C overexcitation limiter model
94	11. Type UEL—Underexcitation limiters 11.1 General
95	11.2 Type UEL1 underexcitation limiter model
96	11.3 Type UEL2 Underexcitation limiter model
97	11.4 Type UEL2C underexcitation limiter model
100	12. Type SCL—Stator current limiters 12.1 General
102	12.2 Type SCL1C stator current limiter model
103	12.3 Type SCL2C stator current limiter model
107	13. Types PF and VAR—Power factor and reactive power controllers and regulators 13.1 General
109	13.2 Power factor input normalization
113	13.3 Voltage reference adjuster
114	13.4 Power factor controller Type 1
115	13.5 Var controller Type 1
116	13.6 Power factor controller Type 2
117	13.7 Var controller Type 2
118	14. Supplementary discontinuous excitation control 14.1 General
119	14.2 Type DEC1A discontinuous excitation control
121	14.3 Type DEC2A discontinuous excitation control 14.4 Type DEC3A discontinuous excitation control
123	Annex A (normative) Nomenclature
124	Annex B (normative) Per-unit system
128	Annex C (normative) Saturation function and loading effects C.1 General C.2 Generator saturation
129	C.3 Rotating exciter saturation
132	Annex D (normative) Rectifier regulation
135	Annex E (normative) Block diagram representations E.1 General E.2 Simple integrator
136	E.3 Simple time constant
137	E.4 Lead-lag block
138	E.5 Proportional-integral (PI) block
139	E.6 Proportional-integral-derivative (PID) block
140	E.7 Washout block
141	E.8 Filtered derivative block E.9 Logical switch block
143	Annex F (informative) Avoiding computational problems by eliminating fast-feedback loops F.1 General F.2 Type AC3C excitation system model
146	F.3 Other Type AC excitation system models
148	Annex G (normative) Paths for flow of induced synchronous machine negative field current G.1 General
149	G.2 No special provision for handling negative field current
150	Annex H (informative) Sample data H.1 General
151	H.2 Type DC1C excitation system
152	H.3 Type DC2C excitation system
153	H.4 Type DC3A excitation system
154	H.5 Type DC4C excitation system
155	H.6 Type AC1C excitation system
156	H.7 Type AC2C excitation system
157	H.8 Type AC3C excitation system
158	H.9 Type AC4C excitation system H.10 Type AC5C excitation system
159	H.11 Type AC6C excitation system
161	H.12 Type AC7C excitation system
164	H.13 Type AC8C excitation system
165	H.14 Type AC9C excitation system
167	H.15 Type AC10C excitation system
168	H.16 Type AC11C excitation system
169	H.17 Type ST1C excitation system
172	H.18 Type ST2C excitation system H.19 Type ST3C excitation system
175	H.20 Type ST4C excitation system
177	H.21 Type ST5C excitation system
178	H.22 Type ST6C excitation system
179	H.23 Type ST7C excitation system
180	H.24 Type ST8C excitation system
181	H.25 Type ST9C excitation system
182	H.26 Type ST10C excitation system H.27 Type PSS1A power system stabilizer H.28 Type PSS2C power system stabilizer
183	H.29 Type PSS3C power system stabilizer H.30 Type PSS4C power system stabilizer
187	H.31 Type PSS5C power system stabilizer
188	H.32 Type PSS6C power system stabilizer
189	H.33 Type PSS7C power system stabilizer
190	H.34 Type OEL1B overexcitation limiter H.35 Type OEL2C overexcitation limiter
192	H.36 Type OEL3C overexcitation limiter H.37 Type OEL4C overexcitation limiter
193	H.38 Type OEL5C overexcitation limiter
194	H.39 Type UEL1 underexcitation limiter
195	H.40 Type UEL2C underexcitation limiter
196	H.41 Type SCL1C stator current limiter
197	H.42 Type SCL2C stator current limiter
199	H.43 Power factor controller Type 1
200	H.44 Power factor controller Type 2 H.45 Var controller Type 1 H.46 Var controller Type 2
201	Annex I (informative) Manufacturer model cross-reference
204	Annex J (informative) Bibliography
207	Back Cover

Additional information

Standard Title	IEEE Recommended Practice for Excitation System Models for Power System Stability Studies
Published Code	IEEE
Publication Date	2016
Pages Count	207

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