An effective on line power system study
ensures confidence in the grid operation and for
business-critical electrical system. It is also is
subjected to wide range of operating conditions.
Such a study is essential on real time system to
achieve the ultimate goal of power system
operation viz, security, reliability, continuity and
optimum cost. Power system operation in India is
passing through a crucial phase of modernization
and up-gradation. It can be said that extensive
understanding of Indian power programs has
enabled the conceptualization and implementation
of state-of-art SCADA and EMS at a crucial time
of power system operation. Real time power
system tools are available at all load dispatch
centers (LDC). Constructing and maintaining the
power system network model that is used by the
network applications is important for ensuring
reliable results. The network model is the
foundation that defines all input data applicable to
the power network applications and tends to be
quite large requiring thousands of pieces of
information relating to the topology of the system
and control area grouping; therefore, the task of
building and maintaining these model is complicated and requires effective and reliable tools
to assists with engineering tasks. Maintaining the
accuracy of the model is further complicated due to
regular up gradation, rearrangement of network
elements, de-rating of elements etc. The application
engineer needs to take special care to upgrade the
model in close co-ordination with field engineers.
As the on-line power system model is tightly
coupled with the SCADA system, it is some time
necessary to adapt to diverse filed conditions for
reliable results. In order to address such problems,
in this paper an attempt has been made to configure
a hybrid type of network model for real time
analysis. Such a requirement is necessary on a
developing power system where real time data for
grid operation and network modeling are required to
be partially decoupled. Multiple sets of real time
data base are required in the proposed method which
has been achieved through an additional program
development system. Depending upon the specific
requirement and filed data availability,
corresponding run time model is deployed in real
time system for network analysis and studies.
Special precautions are required to maintained
synchronism among all network models for compatibility with real time SCADA values and
configurations.