Induction Voltage Near Power Lines
Power lines induce voltages on nearby structures
such as de-energized transmission lines, buildings, railroads, pipelines
and communication lines. This induced voltage can create hazards of
electric shocks, arcing and even fire or explosions.
The assessment of the hazards due to
induction is probably one of the misunderstood phenomenon in power
systems. It is often overlooked leading to severe consequences.
Hazardous working environments can be present if workers are not fully
aware of the electromagnetic field effect on induction voltage.
With the full knowledge of the
electromagnetic induction, utilities can acquire acceptable right-of-way
for their power lines, industries and commercial buildings can allocate
their business at sufficient distances from the power lines, housing
projects can determine the height of their buildings, and utilities can
decide on the separation of their pipelines and railroads from power
lines.
The course will provide the technical
information needed to assess the hazards of sharing the right-of-way
with utility lines as well as worksite hazards for power line work. The
course will also deal with mitigation techniques to reduce the hazards
of induction voltage.
This course is intended to provide the
knowledge needed to compute the induced voltages due to the
electromagnetic fields of energized lines. The computation is simplified
without loss in accuracy so it can be implemented by using handheld
calculators.
Who should
attend?
Electric Power Engineers
Non-power Engineers who are working in the power
field
Field engineers
Construction engineers and developers
Managers of utility companies
Engineers in railroads and pipelines
industries
Topics Covers
Electromagnetic Phenomenon
Electric Field
Magnetic field
Definition of induction voltage
Safety codes
Electric field
Charge
Equipotential Surface
Ground effect
Induced voltage due to nearby energized conductor
Step by step calculations
Test cases and examples
Mitigation techniques
Magnetic field
Flux and flux linkage
Ground effect
Induced voltage due to nearby energized conductor
Step by step Calculations
Test cases and examples
Mitigation techniques
Aggregated induced voltage due to electromagnetic
field
Step by step Calculations
Electric field under power lines and within the
right-of-way
Step by step Calculations
Electric field profile
Allowable limits of electric field strength
Standards and Guidelines
Minimum Vertical Clearance, NESC
Measurements of electric field
strength
Test cases and examples
mitigation techniques
Pipelines, Railroads and Communication Cables
Induced voltage due to electric field coupling
Induced voltage due to magnetic field coupling
Induced voltage due to electrical conductance
Insulated versus bare metal
Over versus under ground metals
Test cases and examples
Mitigation techniques
