{"id":82397,"date":"2024-10-18T03:04:48","date_gmt":"2024-10-18T03:04:48","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-421a-1978\/"},"modified":"2024-10-24T19:50:02","modified_gmt":"2024-10-24T19:50:02","slug":"ieee-421a-1978","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-421a-1978\/","title":{"rendered":"IEEE 421A 1978"},"content":{"rendered":"

New IEEE Standard – Inactive – Superseded. Superseded by 421.2-1990.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.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
7<\/td>\n4.4 Small Signal Performance Indexes
Feedback Control System Performance
Range of Excitation Control System Small Signal Dynamic Performance Indexes <\/td>\n<\/tr>\n
9<\/td>\nScope
2 Dynamic Performance Classification
2.1 Large Signal Performance
2.2 Small Signal Performance <\/td>\n<\/tr>\n
10<\/td>\n3 Large Signal Performance Criteria
3.1 General
3.2 Excitation Systems <\/td>\n<\/tr>\n
11<\/td>\n3.3 Excitation System Components
3.4 Summary
4 Small Signal Performance Criteria
4.1 General
4.2 Transient Response
Exciter or Excitation System Voltage Response <\/td>\n<\/tr>\n
12<\/td>\n4.3 Frequency Response
Typical Time Response of a Feedback Control System to a Step Change in Input <\/td>\n<\/tr>\n
13<\/td>\nSynchronous Machine Open Circuited
the Synchronous Machine Open Circuited <\/td>\n<\/tr>\n
15<\/td>\n4.5 Application of Power System Stabilizers <\/td>\n<\/tr>\n
16<\/td>\nAngle; C – Loaded Machine Operating at 102″ Torque Angle <\/td>\n<\/tr>\n
17<\/td>\nTransfer Function of a Typical Power System Stabilizer
FrequencyorSpeedInput <\/td>\n<\/tr>\n
18<\/td>\n4.6 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 <\/td>\n<\/tr>\n
19<\/td>\n5.3 Field Testing of Excitation System Voltage Response Time
6.1 Excitation System Components <\/td>\n<\/tr>\n
20<\/td>\nExcitation System <\/td>\n<\/tr>\n
21<\/td>\n6.2 Field Testing of Excitation Control Systems <\/td>\n<\/tr>\n
22<\/td>\nPower System Stabilizers <\/td>\n<\/tr>\n
23<\/td>\n(with DC Commutator Exciter) with and without a Power System Stabilizer <\/td>\n<\/tr>\n
24<\/td>\nField Test Data – Power System Stabilizer Signature Tests <\/td>\n<\/tr>\n
25<\/td>\nFig 10 Field Test Data – Damping of a Forced Oscillation with a Power System Stabilizer <\/td>\n<\/tr>\n
26<\/td>\n7 References
Power System Stabilizer During Random System Swings <\/td>\n<\/tr>\n
31<\/td>\nAppendix A Basis Underlying the Concept of Response Ratio
Phasor Diagram of a Simplified Synchronous Generator Against an Infinite Bus <\/td>\n<\/tr>\n
33<\/td>\nElements
Element With a Single Time Constant
Element With Two Time Constants <\/td>\n<\/tr>\n
34<\/td>\nElement With One Time Constant and a Transport Lag
Lag-Lead Network <\/td>\n<\/tr>\n
35<\/td>\nLead-Lag Network
Element Having a Transfer Function with Underdamped Complex Poles <\/td>\n<\/tr>\n
36<\/td>\nElement Having a Transfer Function with Well Damped Complex Poles
Element Having a Transfer Function with Critically Damped Poles <\/td>\n<\/tr>\n
37<\/td>\nTwin-Lead-Lag Network
Rate Circuit With Washout Time Constant <\/td>\n<\/tr>\n
38<\/td>\nOpen-Loop Frequency Response of Typical Excitation System Elements
Closed-Loop Frequency Response of Typical Excitation System Elements <\/td>\n<\/tr>\n
39<\/td>\n0ff.Line with and without Power System Stabilizer <\/td>\n<\/tr>\n
40<\/td>\nAppendix C Calculated Synchronizing and Damping Torque Functions
A – Direct Axis; B – Quadrature Axis <\/td>\n<\/tr>\n
41<\/td>\nSuccessive Oscillation Peaks <\/td>\n<\/tr>\n
42<\/td>\nStabilizer; B – With Power System Stabilizer <\/td>\n<\/tr>\n
43<\/td>\nNomenclature for Appendix C
C1 <\/td>\n<\/tr>\n
44<\/td>\nB – Without Power System Stabilizer; C – With Power System Stabilizer <\/td>\n<\/tr>\n
45<\/td>\nNormalized Envelope of Rotor Angle Oscillations <\/td>\n<\/tr>\n
46<\/td>\nAppendix D Field Measurement of Excitation System Component Gains
Excitation Systems with Manual Control Means Providing Base Excitation
D1 <\/td>\n<\/tr>\n
47<\/td>\nExcitation Systems with DC Regulators as Manual Control Means
D2 <\/td>\n<\/tr>\n
48<\/td>\nPower System Stabilizer Gain
D3
Technique <\/td>\n<\/tr>\n
50<\/td>\nAppendix E Definitions <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Guide for Identification, Testing, and Evaluation of the Dynamic Performance of Excitation Control Systems<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n1978<\/td>\n52<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":82398,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-82397","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ieee","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/82397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/82398"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=82397"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=82397"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=82397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}