An object oriented perspective for AC/MTDC system simulation

Object oriented methodology (OOM) has added a new dimension for the representation, modelling 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 behavioural pattern is on the rise. This has resulted in the terminology of 'complex objects' in system simulation. An AC-MTDC (multi-terminal DC) system has several interrelated/interconnected components and poses a complex picture. Objectifying such a system will lead to an easier rendering of the system design/analysis/identification/performance evaluation and control, and help in better understanding of the system in its entirety. In this paper, a full representation of the various DC system sub components are used for developing classes of components. Detailed representation along with the various attributes and methodologies associated with each of these components are represented. The case study undertaken in this paper is a four terminal AC/MTDC system with all its terminal components. The paper highlights the various advantages the OOM technique offers for power system modelling. 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 the conventional methods.