Optimal load shedding for microgrids with limited DGS (Application in Perwaja Steel Sdn Bhd)
Electric generation and transmission systems may not always meet peak demands. However, when the total demand is more than the generation, overall demand must be lowered, either by turning off service to some devices or cutting back the supply voltage in order to prevent uncontrolled service disr...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2158/1/24p%20WAN%20NORHISYAM%20ABD%20RASHID.pdf http://eprints.uthm.edu.my/2158/2/WAN%20NORHISYAM%20ABD%20RASHID%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2158/3/WAN%20NORHISYAM%20ABD%20RASHID%20WATERMARK.pdf |
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| Summary: | Electric generation and transmission systems may not always meet peak demands. However,
when the total demand is more than the generation, overall demand must be lowered, either by
turning off service to some devices or cutting back the supply voltage in order to prevent
uncontrolled service disruptions such as power outages or equipment damage. Utilities may
impose load shedding on service areas via rolling blackouts or by agreements with specific high
use industrial consumers to turn off equipment at times of system-wide peak demand. However it
is quite different when this is applied on microgrids. Since microgrid is normally isolated from
the main transmission line, therefore they have their own generation which is the distributed
generation (DGs). DGs resources can include fuels cells, wind, solar or other energy sources.
Distributed generation allows collection of energy from many sources and may give lower
environmental impacts and improved security of supply. The multiple dispersed generation
sources and ability to isolate the microgrid from a larger network would provide highly reliable
electric power. Therefore, differential evolution (DE) is applied in a microgrid system in order to
optimize the load shedding by reducing the total curtailed load. Direct Reduction (DR) Plant in
Perwaja Steel Sdn Bhd. has its own microgrid system which is used to produce direct reduction
iron (iron sponge). Load shedding is one of the security measures which are applied in the plant
in to maintain the stability of the system. After the load shedding process, more cost is needed to
restore the curtailed load. However, cost will be reduced if the total curtailed loads which are
needed to be restored are reduced. Therefore DE is applied to reduce the total curtailed load in
the DR Plant microgrid system. |
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