9-20
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SERIES COMPENSATED LINES
CHAPTER 9: THEORY OF OPERATION
9
takes place. The relay does not reduce its reach as it is not necessary. Section (c) shows a high-current internal fault.
Because of the large current, the reach is not reduced and the element responds to this internal fault. Traditional approach
leaves this fault out of the relay reach.
The neutral and negative-sequence directional protection functions of the relay cope with the voltage and/or current
inversions by adding appropriate offset to their polarizing signals as explained in the Ground Directional Overcurrent
section. The offset impedance can always be selected successfully to guarantee correct fault direction discrimination
regardless of the degree of compensation and location of the series capacitors and the potential source.
See the Application of Settings chapter for recommendations on settings for series compensation applications.
Содержание D30 series
Страница 10: ...x D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 52: ...2 38 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL SPECIFICATIONS CHAPTER 2 PRODUCT DESCRIPTION 2 ...
Страница 534: ...5 324 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 564: ...6 30 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL PRODUCT INFORMATION CHAPTER 6 ACTUAL VALUES 6 ...
Страница 578: ...7 14 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 614: ...9 26 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL FAULT LOCATOR CHAPTER 9 THEORY OF OPERATION 9 ...
Страница 654: ...A 10 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 662: ...C 6 D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 670: ...iv D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...
Страница 686: ...xvi D30 LINE DISTANCE PROTECTION SYSTEM INSTRUCTION MANUAL INDEX ...