Counterpoise Mutual Voltage and Its Impacts on the HV Transmission UGOH Pole Earth Potential Rise
-
Mohamad Nassereddine
,
Jamal Rizk
Abstract
High-voltage earthing system design is required to ensure safety compliance and adequate operation of the high-voltage infrastructures. The transmission lines form a solid part of the high-voltage infrastructure. The underground to overhead (UGOH) pole earth grid is one of the main challenges when it comes to transmission line earthing system design. To ensure safety compliance at low cost, counterpoise earthing is used at the UGOH pole for the underground lines. The counterpoise aids in lowering the UGOH pole earth grid resistance. This paper addresses the counterpoise analysis as currently being studied. Furthermore, it introduces the counterpoise mutual voltage between the faulted phase and the counterpoise and its impact at the UGOH pole earth potential rise. Case study is included.
Nomenclature
- OHEW
Overhead earth wire (or ground wire)
- EPR
Earth potential rise
- UGOH
Underground to overhead transition pole
- ECC
Earth continuity cable
Joint bay earth grid current
Fault current
ECC return fault current
Current that generates the counterpoise mutual voltage
UGOH pole current
Mutual impedance between faulted phase and ECC
Mutual impedance between faulted phase and counterpoise
Number of poles
Substation earth grid,
ECC self-impedance for the average section,
Counterpoise self-impedance,
Mutual impedance of the OHEW,
Self-impedance of the OHEW,
Geometric mean radius, m
The conductor/cable manufacturer AC resistance,
Mutual impedance between OHEW and the faulted phase per span,
Pole earth grid resistance,
UGOH pole grid resistance which include electrode and counterpoise system
Distance between OHEW/ECC and faulted phase, m
Coupling factor
OHEW input impedance,
Effect of
OHEW split factor
Optical ground wire
Diameter of the electrode, m
Buried depth, m
Distance between two parallel electrodes, m
Distance from one electrode to the image of the other, m
Length of the electrode, m
Equivalent radius off the electrode at the surface, m
Soil resistivity of the area,
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Detection and Classification of Transformer Winding Mechanical Faults Using UWB Sensors and Bayesian Classifier
- A Generalized Formulation of Demand Response under Market Environments
- A Novel Fault Location Method for Radial Distribution Systems
- Counterpoise Mutual Voltage and Its Impacts on the HV Transmission UGOH Pole Earth Potential Rise
- Harmonic Mitigation in a Coreless Double-Wound Flywheel Machine: Experimental Verification
- Optimal Dispatch of Unreliable Electric Grid-Connected Diesel Generator-Battery Power Systems
- Comprehensive Smart Grid Planning in a Regulated Utility Environment
- AGC System after Deregulation Considering TCPS in Series with the Tie-Line
Articles in the same Issue
- Frontmatter
- Detection and Classification of Transformer Winding Mechanical Faults Using UWB Sensors and Bayesian Classifier
- A Generalized Formulation of Demand Response under Market Environments
- A Novel Fault Location Method for Radial Distribution Systems
- Counterpoise Mutual Voltage and Its Impacts on the HV Transmission UGOH Pole Earth Potential Rise
- Harmonic Mitigation in a Coreless Double-Wound Flywheel Machine: Experimental Verification
- Optimal Dispatch of Unreliable Electric Grid-Connected Diesel Generator-Battery Power Systems
- Comprehensive Smart Grid Planning in a Regulated Utility Environment
- AGC System after Deregulation Considering TCPS in Series with the Tie-Line
