GE MiCOM P40 Agile Technical Manual page 155

Application Notes
MiCOM P40 Agile P442, P444
CONTENTS
1 INTRODUCTION
1.1 Protection of overhead lines and cable circuits
1.2 MiCOM distance relay
1.2.1 Protection Features
1.2.2 Non-Protection Features
1.2.3 Additional Features for the P442 Relay Model
1.2.4 Additional Features for the P444 Relay Model
1.3 Explanation about specific symbols used in the logic diagrams
2 DISTANCE ALGORITHMS
2.1 Distance and Resistance Measurement
2.1.1 Phase-to-earth loop impedance
2.1.2 Impedance measurement algorithms work with instantaneous values (current and voltage).14
2.1.3 Phase-to-phase loop impedance
2.2 "Delta" Algorithm
2.2.1 Fault Modelling
2.2.2 Detecting a Transition
2.2.3 Confirmation
2.2.4 Directional Decision
2.2.5 Phase Selection
2.2.6 Summary
2.3 "Conventional" Algorithms
2.3.1 Convergence Analysis
2.3.2 Start-Up
2.3.3 Phase Selection
2.3.4 Directional Decision
2.3.5 Directional Decision during SOTF-TOR (Switch On To Fault/Trip On Reclose)
2.4 Faulted Zone Decision
2.5 Tripping Logic
2.5.1 General
2.5.2 DDB inputs / outputs for General trip logic
2.6 Fault Locator
2.6.1 Selecting the fault location data
2.6.2 Processing algorithms
2.7 Double Circuit Lines
3 DISTANCE PROTECTION AND DISTANCE SCHEME FUNCTIONS
3.1 Fault distance characteristics ("Distance elements" menu setting)
3.1.1 Line setting
3.1.2 Zone setting
3.1.3 Fault locator
P44x/EN AP/Hb6
(AP) 5-3
7
7
7
7
8
9
10
10
11
11
13
14
15
16
17
20
20
21
21
22
23
23
24
25
25
26
27
27
27
29
30
30
31
33
34
34
34
44