Abstract
In this paper, improvement in the power transfer capacity of transmission lines (TLs) by utilizing a multi-terminal high voltage direct current (MT-HVDC) grid is discussed. A multi-terminal HVDC grid designed for wind power can be used as an extra transmission path in interconnected systems during low wind conditions, and provides extra dynamic stability and security. This paper deals with the power transfer capacity as well as the small signal (SS) stability assessments in less damped oscillations accompanying inter area modes. Computation of the maximum allowable power transfer capability is assessed via DC optimal power flow-based control architecture, permitting more power transfer with a definite security margin. The test system is assessed with and without the exploitation of MT-HVDC grid. Simulation work is done using a generic computational framework i.e., international council on large electric systems (CIGRE) B4 test bench with a Kundur’s two area system, shows that voltage source converters (VSCs) provide excellent control and flexibility, improving the power transfer capability keeping the system stable.
Highlights
Recent researches proved that voltage source converter (VSC) based multi-terminal high voltage direct current (MT-HVDC) has a great potential to deal with the challenges of future transmission networks
VSCs and upper control layer is dedicated to the droop/wind farms (WFs)
An average two-level VSCs value model is used for MT-HVDC grid modeling, while WFs are demonstrated as fixed power sources
Summary
Recent researches proved that voltage source converter (VSC) based multi-terminal high voltage direct current (MT-HVDC) has a great potential to deal with the challenges of future transmission networks. Despite the fact that a lot of research has already been done to develop appropriate DC grid models and control schemes but the impacts of MT-HVDC system on dynamic security and stability of power systems (PS) has not been discussed fully yet. For this concern, an important feature is the transfer capacity in inter-area mode that shows how much power can be transferred without violating the system stability limits. This work suggests the use of MT-HVDC grids to enhance power transfer capability of transmission lines.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
