Summary
This Guide provides information on the operation of conventional conductor systems at temperatures higher than traditional ratings of 75°C continuous operation and 100°C emergency for short excursions to allow for continued operation during contingencies. Operating conductor systems above 100°C allows for higher current flow over existing lines, but has short and long term consequences that must be considered for the safe operation of the line.
Table of content
Executive Summary
Section 1. Forward
1.1. Scope
Section 2. Nomenclature
2.1. Definitions
2.2. Symbols
Section 3. Conductors
Section 4. Connectors
4.1. Conventional Connectors
4.2. Connector High Temperature Operation
4.3. Connector Shunts
4.4. Mitigation of Connector High Temperature Operation
4.5. Monitoring Techniques
Section 5. Conductor Hardware
5.1. Metallic Conductor Hardware
Section 6. References
Annex A. Creep Predictor Equations for High Temperature Operation
A.1. General
A.2. Definition of Terms
A.3. Creep Predictor Equations
A.4. Temperature Change
A.5. Use of Predictor Equations
Annex B. Example of Calculating Elevated Temperature Creep and Its Effect on Conductor Sag
B.1. General
B.2. Problem Statement
B.3. Example Calculation (Metric)
B.4. Example Calculation (English)
Annex C. Residual Conductor Strength Predictor Equations for High Temperature Operation
C.1. General
C.2. Definition of Terms
C.3. Residual Conductor Strength Predictor Equations
Annex D. Bibliography
D.1. Conductors
D.2. Connectors
D.3. Conductor Hardware
D.4. General
Additional informations
| Publication type | Technical Brochures |
|---|---|
| Reference | 643 |
| Publication year | |
| Publisher | CIGRE |
| ISBN | 978-2-85873-345-3 |
| Study committees | |
| Working groups | WG B2.42 |
| File size | 1 MB |
| Pages number | 39 |
| Price for non member | 90 € |
| Price for member | Free |
Authors
M. LANCASTER, Convenor (US), D. LIEBHABER, Secretary (US)
H. ARGASINSKA (PL), B. BRAHE (DE), D. DOUGLASS (US), J. IGLESIAS (ES), O. GUNTNER (HU), F. JAKL (SI), D. LOUDON (NO), J. LUNDQUIST (SE), C. NASCIMENTO (BR), T. SEPPA (US), R. STEPHEN (ZA), L. VARGA (HU), G. WATT (CA), K. YONEZAWA (JP), J. REDING (US)
Reviewers
J. TOTH (CA), V. SHKAPTSOV (RU), B. WAREING (UK)
Keywords
overhead transmission lines, high-temperature conductors, dynamic line rating, sag-tension analysis, ACSR conductors, transmission line connectors, grid reliability, conductor systems, power transmission, thermal line rating
