The study used figures from the World Bank, the International
Energy Authority, local utility and previous studies demonstrate
that a Distribution Management System such as MicroSCADA
Pro could reduce carbon emissions by 344,000 tonnes a year
in Addis Ababa alone. Applied globally that number rises to
more than nine million tonnes a year, and that’s on top of
the cost and health savings which come from automation.
Sub-Saharan Africa, from where much of the improvement is
drawn, has impressively-green credentials when it comes to
generating electricity. Large scale hydroelectric projects create
power with a minimal carbon dioxide footprint, but getting
that power to those who need it is a constant challenge.
A company operating in sub-Saharan Africa can, according
to the study, expect to lose power almost nine times a month,
and with the outages averaging more than five hours, it can
turn the business into an unwanted lottery.
Which is why so many companies install their own generators,
generators which are neither as efficient or as cost effective
as the national supply, but are a necessary expense when the
electricity supply is so unreliable. In Nigeria, for example, 86%
of businesses have installed their own generating capacity.
But it isn’t lack of electricity which drive companies to install
in-efficient generators – droughts do occasionally interrupt the
supply, but the real problems lie in the distribution network,
which is where a technology like MicroSCADA Pro can help.
The distribution automation incorporated within MicroSCADA
Pro not only provides unparalleled visibility of the operating network,
but it can reduce the duration of outages. The system
can automatically detect and locate a fault, lever the network
topology to restore service where possible, all before the
customer has had time to pick up the phone.
To isolate any other factors, and provide more-concrete
figures, the research focused on Addis Ababa and how a
national deployment of MicroSCADA Pro could improve
power delivery in the country.
Addis Ababa is an ideal candidate. The city has 2007
kilometers of medium voltage line, the vast majority of which
is on overhead lines, and 17 substations connecting
97 feeders. The distribution network includes 147 switching
stations, but while those could be automated they are
currently switched manually. The lack of distribution management
makes Addis Ababa perfect for a study demonstrating
the affect that MicroSCADA Pro DMS600 can have.
In the twelve months following July 2010 the people of
Addis Ababa suffered 19,537 power outages, with an average
duration of 1.04 hours, providing a baseline for the study.
In order to measure the potential of distribution automation
the entire network of Addis Ababa was simulated using an
installation of ABB’s MicroSCADA Pro DMS600. Some
estimations were used to recreate the network loading,
but the quantity and severity of the faults was drawn from
the gathered statistics.
Not every grid problem can be addressed by automating
the distribution network, and a detailed breakdown of the
reported faults showed that about 13,000 of them would
need more-radical measures to address. But that still leaves
almost seven thousand occasions where robust distribution
automation, in the form of MicroSCADA Pro, could have
made a real difference.
Analysing the data produced by the simulation the
researchers found that outages could, on average, be
immediately reduced by 30% simply by responding faster
to faults. That could save the distribution company
$13,593,830 over the 20-year duration of the experiment,
$2m in the first five years, ensuring a healthy return on
a green investment.
|SAIDI (h/20 a.)
|ENDE (TWh/20 a.)
The benefits of reducing carbon emissions are harder to
quantify. The study found that a network could reduce carbon
emissions by 344,000 tonnes, resulting in an environmental
saving alongside the financial one. Even harder to quantify is
the life changing effect of clean cooking in domestic homes.
In sub-saharan Africa 76% of people are burning biomass to
cook their food – in Addis Ababa alone they’re cutting down
500 square kilometers of forest every year, while hydroelectricity
is going to waste because the distribution system
isn’t able to deliver.
What this study demonstrates is that
MicroSCADA Pro can deliver the power, improve productivity,
and truly create a better world for those living in it.