PD IEC/TR 60071-4:2004
Current
The latest, up-to-date edition.
Insulation co-ordination Computational guide to insulation co-ordination and modelling of electrical networks
Hardcopy , PDF
English
08-17-2004
FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 List of symbols and acronyms
5 Types of overvoltages
6 Types of studies
6.1 Temporary overvoltages (TOV)
6.2 Slow-front overvoltages (SFO)
6.3 Fast-front overvoltages (FFO)
6.4 Very-fast-front overvoltages (VFFO)
7 Representation of network components and numerical considerations
7.1 General
7.2 Numerical considerations
7.3 Representation of overhead lines and underground cables
7.4 Representation of network components when computing temporary
overvoltages
7.5 Representation of network components when computing slow-front
overvoltages
7.6 Representation of network components when computing fast-front
transients
7.7 Representation of network components when computing very-fast-front
overvoltages
8 Temporary overvoltages analysis
8.1 General
8.2 Fast estimate of temporary overvoltages
8.3 Detailed calculation of temporary overvoltages [2], [9]
9 Slow-front overvoltages analysis
9.1 General
9.2 Fast methodology to conduct SFO studies
9.3 Method to be employed
9.4 Guideline to conduct detailed statistical methods
10 Fast-front overvoltages analysis
10.1 General
10.2 Guideline to apply statistical and semi-statistical methods
11 Very-fast-front overvoltage analysis
11.1 General
11.2 Goal of the studies to be performed
11.3 Origin and typology of VFFO
11.4 Guideline to perform studies
12 Test cases
12.1 General
12.2 Case 1: TOV on a large transmission system including long
lines
12.3 Case 2 (SFO) - Energization of a 500 kV line
12.4 Case 3 (FFO) - Lightning protection of a 500 kV GIS substation
12.5 Case 4 (VFFO) - Simulation of transients in a 765 kV GIS [51]
Annex A (informative) Representation of overhead lines and underground
cables
Annex B (informative) Arc modelling: the physics of the circuit-breaker
Annex C (informative) Probabilistic methods for computing lightning-related
risk of failure of power system apparatus
Annex D (informative) Test case 5 (TOV) - Resonance between a line
and a reactor in a 400/220 kV transmission system
Annex E (informative) Test case 6 (SFO) - Evaluation of the risk of
failure of a gas-insulated line due to SFO
Annex F (informative) Test case 7 (FFO) - High-frequency arc
extinction when switching a reactor
Bibliography
Figures
Tables
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