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Implementing a GIS in an electrical utility: The growth pains
Shubhabrata Marmar
ESRI India
This paper takes a look at an implementation of GIS in a
power company in Beirut, Lebanon. The paper discusses the difficult process of
generating a database for the GIS and the fact that most of us hesitate to
approach and confront this problem. The case study is chosen because the
situation and circumstances under which the GIS was created are very similar to
those here in India.
The Business of Energy
Let us look at
the average day in an electric utility. There are engineers in the operations
unit who are using a number of systems to monitor the current network load and
demand as well as the current status of the generation units.
In the
Fault Repair and Customer Service room, Engineers and service technicians along
with telephone operators and maybe a dispatcher, record and process calls for
help from across the city. Each call is located on a map. The dispatcher or an
engineer may try to figure out if there is a pattern to the calls and see if any
facilities are automatically being pointed out as the source of the problem by
the calls. For instance, if all the calls originate on a single street, then any
facility, say the wire, which connects them all or the common component in the
next higher hierarchy will in all probability be the source.
The
identification of the source automatically leads to which kind of service crew
is required to solve the problem and whether such a crew is available, if yes
send them in or else wait for the first such crew to become available.
The planning section has engineers who are finishing up the new plan for
a new layout on the edge of the town and all that is left is to figure out
whether the current main network can support the extension with or without
modification.
This operation appears to be huge but the picture is
distorted. To put things in perspective, consider the supply network. The supply
network is a maze of wires, transformers and other components that spread out
like tentacles from the generating station and connect to households and
factories across the town (or the country, for that matter) via substations to
regulate and alter voltage as required.
The Electricity provider has to
ensure that the entire network is operational at all times, regulate
connections, monitor their consumption for operations as well as billing
purposes. Fortunately in India, Electricity has so far been an exclusively
Government exercise, otherwise, if it were privatised and customers were given
the choice of provider as in the US, the company also gets to monitor who
un-subscribes from their services. The mammoth task is made much easier when
every component of the maze (every line, pole, meter) is available and
track-able in a digital database. It allows a user to attach information to each
object in a table and refer to this table whenever required. It becomes even
easier, if this digital database is a spatial digital database, or a Geographic
Information System.
The introduction of a GIS allows the maze to be
represented as it really is, to show where lines have been put up, which lines
connect which customers as well as background information like plots, houses
etc.
The Evolution of Enterprise GIS in Electric Utilities
In
the early days, GIS used to be a project activity. One department in the utility
would start by implementing a GIS and spend a lot of time and energy creating
first of all a database. This would typically take up about 70 percent of the
time and money. The database could then be used for a number of functions and
suddenly, a lot of the jobs in that department would become much easier and
faster to carry out. The other departments would then learn of the breakthrough
and they would begin to implement their own systems which would be implemented
with some dependence on the other departments’ pre-created database and soon,
most, even all departments would have their systems which would finally be
connected so that information could be shared right across the organization.
Suddenly, it would become possible for an engineer to create a plan and get an
opinion from the operations or billing manager and see if they would face any
problems in implementing a design. A finance person could track all new network
components that were purchased and bring them up to show the auditor.
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