Are%20High%20Tension%20Power%20Lines%20Necessary?

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Are High Tension Power Lines Necessary?

• JALEEL STERLING
• ASHLEY CARLONI
• DAVID BERNHART
• ELIZABETH ANDERSON

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What are high powered tension lines?

• High powered tension is the bulk transfer of
  electrical energy, from generating power plants
  to electrical substations located near demand
  centers.

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Types of transmission lines

• Extra-high Voltage (230,000V and up)
• More Efficient Fewer losses will occur in a
  higher voltage transmission line than a line with
  a lower voltage
• Bundled conductors In higher voltage lines
  multiple wires can be hung from the same
  insulator, which increases the power carried by a
  single circuit
• Sub-transmission lines (69,000V-161,000V)
• Used to transmit electrical energy between
  stations located close to one another (less than
  100 miles apart)
• Typically do not carry as much energy as
  extra-high voltage lines
• Distribution lines (13,800V-34,500V)
• Transmit energy to its end use
• Commercial facilities, small factories, small
  house transformers

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Map of high powered tension lines In the U.S.
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Facts about high powered tension lines

• Use of high voltage direct current (HVDC) to
  transmit large amounts of power from the
  generating station over long distances
• Voltages vary from 138kV to 765kV
• Radiate Powerful Electromagnetic fields (EMFs)
• Electrical Field the part of the EMFs that can
  be shielded.
• Magnetic Field the part of the EMFs that can
  penetrate stone, steel and human flesh.
• Both fields are invisible and perfectly silent.

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Viewpoint 1High Tension Power Lines are harmful
humans and the environment
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Negatives of high powered tension lines

• High powered lines form (EMF) Electric and
  Magnetic fields
• EMF occur naturally and as a result of the Power
  generation, Power Transmission, Power
  distribution and use of electric power.
• EMF is fields of force and is created by electric
  voltage and current. They occur around electrical
  devices or whenever power lines are energized
• Magnetic fields result from the motion of the
  electric charge or current, such as when there is
  current flowing through a power line or when an
  appliance is plugged in and turned on. Appliances
  which are plugged in but not turned on do not
  produce magnetic fields.

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EMF Effects Human beings

• Short Term Health Problem

• Long term Health Problem

• Headaches
• Fatigue
• Anxiety
• Insomnia
• Prickling and/or burning skin
• Rashes
• Muscle pain

• Risk of damaging DNA
• Risk of Cancer
• Risk of leukemia
• Risk of Neurodegenerative disease
• Risk of Miscarriage

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How EMF effects you by distance
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Negative Statistics

• From the British Medical Journal Researchers
  found the children living within 650 feet of
  power lines had a 70 risk for leukemia than
  children living 2,000 feet away or more.
• From Epidemiology Several studies have
  identified occupational exposure to EMFs as a
  potential risk factor for neurodegenerative
  diseases
• From Epidemiology There is strong prospective
  evidence tat prenatal magnetic exposure may be
  associated with miscarriage risk.
• From the Internal Medicine Journal People who
  lived within 328 yards of a power line up to age
  5 were five times more likely o develop cancer as
  an adult. People who lived within 328 yards of a
  power line up to age 15 were three times more
  likely to develop cancer as an adult.

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EMF Effects on Agricultural lands and farms

• Transmission lines can affect farm operations and
  increase cost.
• Most impact depends om the line design.
• Transmission lines can affect
• Field operations
• Irrigation
• Aerial spraying
• Wind breaks
• Hinder future consolidation of farm fields or
  subdividing land for residential development.

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Viewpoint 2High Tension Power Lines are more
efficient and not proven to be harmful
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There is no real evidence to support the
causation of cancer

• Scientists that claim the EMFs from high tension
  power lines cause cancer have found correlations
  but no true evidence to prove that living near
  these transmission lines actually causes cancer
• Many studies contradict each other
• This is likely to be a long-term disagreement
  between scientists with no real conclusion in the
  near future

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Lower Radiation Frequency than household
appliances
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Efficiency

• Wires on more efficient high-voltage power lines
  do not get as hot, which results in substantially
  lower electricity losses in the process of moving
  power into communities.
• Lower losses between generation sources and load
  centers mean a reduction in the required
  electricity output needed to transport power and
  meet demand.

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Efficiency Chart
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Our ViewpointHigh Tension Power Lines are
necessary!
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Why high tension power lines are necessary

• High demand for electrical energy
• Without them, generation would have to take place
  near or where the energy is used
• Low voltage power lines result in great losses
  during transmission
• High tension power lines transport large amounts
  of electrical power over long distances

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.Our Opinion

• Burying High Voltage Power Lines
• When compared to overhead high voltage power
  lines, underground lines are
• Safer
• More friendly on the environment
• More Reliable
• More efficient
• More cost effective
• And have less impact on
• Health
• Property devaluation

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Sources

• http//www.eia.gov/todayinenergy/detail.cfm?id893
  0
• http//www.iject.org/vol4/spl1/c0047.pdf
• http//www.bpa.gov/news/pubs/GeneralPublications/l
  usi-Power-lines-and-crops-can-be-good-neighbors.pd
  f
• http//psc.wi.gov/thelibrary/publications/electric
  /electric10.pdf