Dc bus for photovoltaic power supplying computing loads

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Dc bus for photovoltaic power supplying computing
loads

• 4th year Electronic Engineering
• Michael ikerionwu

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Introduction

• Most renewable sources of electrical energy feed
  into an AC grid before being applied to supply
  different electrical loads
• For example DC power produced by domestic
  photovoltaic(PV) panels feeds into the grid
  through AC inverter.

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Aims

• To investigate if the efficiency of power
  delivered from a domestic PV installation
  supplying DC loads (such as computer or lighting
  led etc) can be improved by supplying such DC
  loads through a DC bus instead of through an AC
  grid connection.

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Milestones

• Milestone1
• Review of domestic PV systems.
• Determine the power consumption of a range of DC
  loads.
• Determine the efficiency of power conversion from
  the AC grid to a typical load.
• Milestone 2
• Investigate standard DC/DC topologies for the
  chosen load.
• Milestone 3
• Build and test a standard DC/DC solution to
  illustrate the highest level of efficiency
  possible.
• Milestone 4
• Design DC/DC converter for solar panel to DC bus
  conversion.
• Milestone 5
• Build and test a DC/DC stage to demonstrate
  improved efficiency over a range of source and
  load conditions.

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Work done so far

• Reseach on PV systems e.g panel characteristics
  and equivalent circuit.
• Looked at power absorbed by different DC loads
  such as tvs, computers, laptop, PS3...etc.
• Maximum power point tracking point at which
  circuits gets its maximum power.

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Work done so far cont.

• Install PSPICE and get use to it.
• Look at rectifier circuit in PSPICE.
• AC to DC conversion.
• Basically covering the first milestone.

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PV panel circuit and characteristic
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Maximum point tracking
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Health and safety issues

• Test on power converters should only be performed
  under the supervision of a technician or project
  supervisor.