An object oriented perspective for AC/MTDC system simulation

Object oriented methodology (OOM) has added a new dimension for the representation, modeling and simulation of various day-to-day applications. The basic paradigm of OOM reflects the closeness to which the methodology relates to the real world entities. Over a period of time, the requirement of detailed and exact representation with no approximation of real world objects that reflects its behavioral pattern is on the rise. This has resulted in the terminology of ‘complex objects’ in system simulation. An AC-MTDC system has several interrelated/interconnected components and poses a complex picture. Objectifying such a system will improve the system design/analysis/identification/performance evaluation and control and provide a better understanding of the system in its entirety. In this paper a full representation of the various DC system sub-components is used for developing classes of components. A detailed representation along with the various attributes and methodologies associated with each of these components is given. The case study undertaken in this paper is a four terminal MTAC/DC system with all its terminal components. The paper highlights the various advantages the OOM technique offers for power system modeling. This notation is of immense help, especially during the system design stage wherein the tuning of various system components can be achieved without undergoing the rigor of conventional methods.