IEEE 1110 1991

$102.92

IEEE Guide for Synchronous Generator Modeling Practices in Stability Analyses

Published By	Publication Date	Number of Pages
IEEE	1991	87

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Description

New IEEE Standard – Inactive – Superseded. Superseded by 1110-2002. Three direct-axis and four quadrature-axis models are categorized, along with the basic transient reactance model. Some of the assumptions made in using various models, including the basic model, are discussed, and the fundamental equations and concepts involved in generator/system interfacing are presented. The various attributes of power system stability are covered in a general way, with two basic approaches being recognized. The first is categorized under large-disturbance nonlinear analysis. The second approach considers small disturbances, where the corresponding dynamic equations are linearized. Applications of a range of generator models are discussed and treated. The manner in which generator saturation is treated in stability studies, both in the initialization process, as well as during large or small disturbance stability analysis procedures is addressed. Saturation functions that are derived either from test data or by the methods of finite elements are developed. Different saturation algorithms for calculating values of excitation and internal power angle, depending upon generator terminal conditions, are compared. The question of parameter determination is thoroughly covered. Two approaches in accounting for generator field and excitation system base quantities are identified. Conversion factors are given for transferring field parameters from one base to another for correct generator/excitation system interface modeling. Suggestions for modeling of negative field currents and other field circuit discontinuities are included.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction
4	Participants
6	CONTENTS
9	1. Introduction 1.1
10	1.2 References
11	2. Model Classifications or Categories 2.1 Practical Models Available
15	2.2 Nomenclature and Glossary of Frequently used Terms
19	2.3 References
20	3. Classification of Stability Studies 3.1 Background
21	3.2 Large Disturbances Stability
22	3.3 Small Disturbance Stability 3.4 Classification Based on Dominant Modes of System Response 3.5 References
23	3.6 Bibliography 4. Application of Generator Models in Stability Studies 4.1 General
26	4.2 Representation of Generations During Large Disturbances
27	4.3 Modeling of Machines for Small Disturbance Stability Studies
28	4.4 References 4.5 Bibliography
30	Annex 4A—Calculation of Generator Electrical Torques or Powers (Informative)
32	5. Representation of Generator Saturation and its Effect on Generator Performance 5.1 General 5.2 Representation of Generator Saturation in the Steady State
34	5.3 Representation of Saturation Effects During Large Disturbances
37	5.4 Generator Saturation in Small Disturbance Modeling
39	5.5 References
41	Annex 5A—Saturation—Past Practices and General Considerations
44	Annex 5B—Steps Used in a Widely-Used Commercial Stability Program to Account for Saturation During the Ste…
47	Annex 5C—Procedures in a Second Stability Program to Account for Saturation When Adjusting Mutual Reactances
52	Annex 5D—Finite-Element-Derived Steady-State Saturation Algorithms
56	Annex 5E—Comparison of Certain Existing Methods of Accounting for Saturation
59	6. Determination of Generator Stability Parameters 6.1 Stability Parameters Obtained by Testing Generators Under Short-Circuit or Open-Circuit Conditions 6.2 Frequency Response Testing of Generators
61	6.3 Parameters Derived by Two Manufacturers in the Machine Design Stage 6.4 Desirability for Uniform Practices in Deriving Machine Stability Parameters
63	6.5 Alternative Forms of Model Representation
64	6.6 References 6.7 Bibliography
66	Annex 6A—Determination of Direct-Axis Parameters from Test Results
71	Annex 6B—Alternate or Nonstandard Methods of Obtaining Stability Parameters
73	Annex 6C—Generator Stability Data Translations
79	7. Field and Excitation Considerations 7.1 Establishing Field-Voltage, Field-Current and Field-Impedance Bases
80	7.2 Calculation of Field Resistance
81	7.3 Field-Circuit Identity 7.4 Special Techniques for Modeling Field-Current Reversal or Field Shorting
82	7.5 References
83	Annex 7A—Establishing and Comparing Field-Circuit Relationships—Reciprocal vs. Nonreciprocal System
86	Annex 7B—Excitation System-Generator Simulation Interfaces