학술논문
Stability Analysis and Control Design for Multiterminal HVDC Network With Power Flow Controller
Document Type
Periodical
Author
Source
IEEE Canadian Journal of Electrical and Computer Engineering IEEE Can. J. Electr. Comput. Eng. Canadian Journal of Electrical and Computer Engineering, IEEE. 46(1):44-55 Jan, 2023
Subject
Language
ISSN
2694-1783
Abstract
The power flow control in high-voltage direct current (HVDC) grids can be improved by employing the interline dc power flow controller (IDCPFC). This article presents an improved control scheme using IDCPFC to balance power flow in the dc networks. In this work, a differential-mode transformer (DMT) is used in combination with a bidirectional buck converter to form a variable DMT. In comparison to the existing methods, the proposed system is scalable to higher voltages and powers, which makes it suitable for high-voltage dc transmission systems. Analysis of a small-signal model of the proposed method and design of compensator for improvement of transient behavior is performed. A simulation is performed with independent feed-forward and feedback control to show the effectiveness of the proposed method. The proposed method is also validated through a 600-W experimental prototype. The experimental results show that the current flow between lines is controlled for unbalance load conditions.