N. Singh et al., POWER-SYSTEM MODELING AND ANALYSIS IN A MIXED ENERGY MANAGEMENT AND DISTRIBUTION MANAGEMENT-SYSTEM, IEEE transactions on power systems, 13(3), 1998, pp. 1143-1149
Energy Management Systems (EMS) and Distribution Management Systems (D
MS) have developed over the years as two distinct branches of control
centres working on Supervisory Control and Data Acquisition (SCADA) pl
atforms. A hybrid EMS/DMS system requires higher level security analys
is functions such as state estimation and contingency analysis for EMS
and feeder voltage and loss optimisation for DMS systems. This paper
highlights specialities of these hybrid systems. Special emphasis has
been placed on modelling aspects where the common elements between EMS
and DMS must be modelled to cater to both types of functions. Since s
uch a system does not have as high a degree of observability as a pure
transmission system, the real-time applications such as topology/dyna
mic network colouring and state estimation have to be tailored to suit
them. The complete suite of extended real-time and study mode functio
ns, provide specific operational aids in maintaining security while pr
oviding an optimum economic operation. This paper discusses the modell
ing and functional details of such hybrid systems and practical experi
ence gained during the implementation of such a system is presented.