Damping of power system oscillations as affected by VSC-based control
This paper presents the damping torque analysis of power system oscillation stability as affected by the dynamic and control functions of an embedded voltage source converter (VSC). The objective of study is to explain why and how the dynamic and basic control functions of the embedded VSC, ac and dc voltage regulation, provides damping to power system oscillations. The most important conclusion obtained in the paper is that the dynamic and dc voltage control of the VSC contribute a variable damping torque, which can be positive or negative, at different levels of system load conditions. More positive damping torque can be supplied by the VSC at a heavier load condition. There exists a point of system load condition where the VSC provides no damping torque to power system oscillation hence dose not imposes any influence on power system oscillation stability. The VSC studied in the paper can be the powerelectronics- based interface of various FACTS (flexible ac transmission systems) controllers, energy storage systems and renewable power generation units, although the focus of discussion in the paper is the effect of dynamic and basic control functions of the VSC themselves on power system oscillation damping. To demonstrate the analytical conclusions obtained in the paper, results of eigenvalue computation and non-linear simulation of an example power system installed with a STATCOM (static synchronous compensator) are given.
Power system oscillations damping torque analysis VSC STATCOM
W. Du H. F. Wang R. Dunn
Southeast University, Nanjing China Queen’s University of Belfast, Belfast, UK Queen’s University of Belfast, Belfast, UK University of Bath, Bath, UK
国际会议
The International Conference on Electrical Engineering 2009(2009 电机工程国际会议)
沈阳
英文
1-8
2009-07-05(万方平台首次上网日期,不代表论文的发表时间)