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IEEE 421A 1978

$26.54

IEEE Guide for Identification, Testing, and Evaluation of the Dynamic Performance of Excitation Control Systems

Published By Publication Date Number of Pages
IEEE 1978 52
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New IEEE Standard – Inactive – Superseded. Superseded by 421.2-1990. This guide includes criteria, definitions, and test procedures for evaluating the dynamic performance of excitation control systems as applied by electric utilities. Primary purposes are to provide a basis for evaluating closed-loop performance of excitation control systems (including both the synchronous machine and its excitation system) for both large and small signal distutbances; confirming the adequacy of mathematical models of excitation systems for use in analytical studies of power systems; specifying methods for performing test of excitation control systems and their components; and preparing excitation system specifications and additional standards. Portions of this guide will also serve as an educational means for people becoming acquainted with excitation control systems.

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PDF Pages PDF Title
7 4.4 Small Signal Performance Indexes
Feedback Control System Performance
Range of Excitation Control System Small Signal Dynamic Performance Indexes
9 Scope
2 Dynamic Performance Classification
2.1 Large Signal Performance
2.2 Small Signal Performance
10 3 Large Signal Performance Criteria
3.1 General
3.2 Excitation Systems
11 3.3 Excitation System Components
3.4 Summary
4 Small Signal Performance Criteria
4.1 General
4.2 Transient Response
Exciter or Excitation System Voltage Response
12 4.3 Frequency Response
Typical Time Response of a Feedback Control System to a Step Change in Input
13 Synchronous Machine Open Circuited
the Synchronous Machine Open Circuited
15 4.5 Application of Power System Stabilizers
16 Angle; C – Loaded Machine Operating at 102″ Torque Angle
17 Transfer Function of a Typical Power System Stabilizer
FrequencyorSpeedInput
18 4.6 Synchronizing and Damping Torque Coefficients
4.7 Torsional Oscillations
4.8 Summary
5 Large Signal Performance Testing
5.1 Exciter Response Ratio
5.2 Excitation System Response Ratio
19 5.3 Field Testing of Excitation System Voltage Response Time
6.1 Excitation System Components
20 Excitation System
21 6.2 Field Testing of Excitation Control Systems
22 Power System Stabilizers
23 (with DC Commutator Exciter) with and without a Power System Stabilizer
24 Field Test Data – Power System Stabilizer Signature Tests
25 Fig 10 Field Test Data – Damping of a Forced Oscillation with a Power System Stabilizer
26 7 References
Power System Stabilizer During Random System Swings
31 Appendix A Basis Underlying the Concept of Response Ratio
Phasor Diagram of a Simplified Synchronous Generator Against an Infinite Bus
33 Elements
Element With a Single Time Constant
Element With Two Time Constants
34 Element With One Time Constant and a Transport Lag
Lag-Lead Network
35 Lead-Lag Network
Element Having a Transfer Function with Underdamped Complex Poles
36 Element Having a Transfer Function with Well Damped Complex Poles
Element Having a Transfer Function with Critically Damped Poles
37 Twin-Lead-Lag Network
Rate Circuit With Washout Time Constant
38 Open-Loop Frequency Response of Typical Excitation System Elements
Closed-Loop Frequency Response of Typical Excitation System Elements
39 0ff.Line with and without Power System Stabilizer
40 Appendix C Calculated Synchronizing and Damping Torque Functions
A – Direct Axis; B – Quadrature Axis
41 Successive Oscillation Peaks
42 Stabilizer; B – With Power System Stabilizer
43 Nomenclature for Appendix C
C1
44 B – Without Power System Stabilizer; C – With Power System Stabilizer
45 Normalized Envelope of Rotor Angle Oscillations
46 Appendix D Field Measurement of Excitation System Component Gains
Excitation Systems with Manual Control Means Providing Base Excitation
D1
47 Excitation Systems with DC Regulators as Manual Control Means
D2
48 Power System Stabilizer Gain
D3
Technique
50 Appendix E Definitions
IEEE 421A 1978
$26.54