Operation of Multi-Terminal HVDC System

Abstract

The interconnection between different grids is adopted as one of the economical solutions for electricity adequacy rather than spending on expansion which may be needed only for few hours per day. This became as common practice between neighbouring countries for power exchange during peak hours especially when there is time shift between these peak periods in the interconnected countries. If the interconnected networks have different frequencies such as Saudi Arabia with Yemen, Norway with Germany and Kingdom of Saudi Arabia with Egypt, the High Voltage Direct Current HVDC transmission become the only feasible solution to realize this objective. The HVDC system not only enables connecting two networks with different frequencies but also privileged with easier load flow control and possibility of multi-terminal connection.