Solar Power Grid Connection And Iraq Society

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Solar Power Grid ConnectionAnd Iraq Society

• M. I. Sanduk
• Institute of Physics
• Engineering Physics Group, London, UK.
• E-mail m_sanduk_at_physics.org
• Al Kindi Engineering Conference 2008

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Solar Systems Connections

• Off-Grid or stands a lone insulation. This solar
  panel is directly connected to a battery which
  stores the electricity generated and acts as the
  main power supply with an inverter.
• Grid Support connection In this type solar panel
  is connected to the local electricity network and
  also to a back-up battery.
• Grid Connection In this type the solar panel is
  connected to the local network only, without
  back-up battery.
• Hybrid Connection. The solar panel can be used
  with other power supplies like the local engine
  generator or the wind power generator
• Al Kindi Engineering Conference 2008

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Iraq and the Solar energy

• Electric shortage. Solar energy may provide a
  free clean energy.
• Solar electricity systems depends on battery as
  an energy storage, and there should be continuous
  need for regular maintenance. Unfortunately, In
  Iraq the is no interest in regular maintenance.
• In case of grid connection, the energy could be
  provided by the ordinary people and no need for
  battery maintenance. This connection may be fit
  the Iraqi society.
• Al Kindi Engineering Conference 2008

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Example (1)

• Solar radiation in UK is about 300 W/m-square
  per day and Sun shin duration 6 h. For roof area
  100m square. Let the efficiency is 30, the
  produced energy is 54 kWh per day (300 x 100 x
  30 x 6) or 19.7 MWh per year.
• The solar system is a group of 57 modules of size
  1.75 squared m. , and modules power 157 W.
• Al Kindi Engineering Conference 2008

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Example (2)

• Solar radiation in Iraq is about 425 W/m-square
  per day, and Sun shin duration 12 h .
• The same system produces 153 kWh per day (425 x
  100 x 30 x 12) or annually 55.8 MWh.
• It is about three times of UK case
• If Iraq demands is about 10000 MW, This can be
  obtained by
• 10000/0.15365,359 station
• Al Kindi Engineering Conference 2008

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Grid Connections
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Grid-Tie Inverter (GTI) 1
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Grid-Tie Inverter (GTI) 2

• GTI works by taking the 12 or 24 volt DC voltage
  from the solar panels and 'chopping' by turning
  it on and off at grid supply frequency (e.g. 50
  Hz) using a local oscillator and a power
  transistor.
• then filtered to make it into a sine wave, and
• then applying it to a transformer to up the
  voltage to 220 to supply the needs of load.
• Al Kindi Engineering Conference 2008

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Installed global solar PV generating capacity
1992 to 2005
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The Way

• Since this type of connection is quite useful for
  both the provider and the power authority
  (companies or governments) these authorities
  presents many benefits for the providers. This
  type of dealing encourages the power consumers to
  utilize solar energy and become power providers.
  The effect of that is quite obvious on the growth
  of grid connection as shown in Fig.1.
• The producer sells the energy to the network and
  can get it from the network when he wants.
• Al Kindi Engineering Conference 2008

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• Thank You
• Al Kindi Engineering Conference 2008