Control Lyapunov functions for Controllable Series Devices

被引:119
作者
Ghandhari, M [1 ]
Andersson, G
Hiskens, IA
机构
[1] Royal Inst Technol, KTH, Dept Elect Power Engn, S-10044 Stockholm, Sweden
[2] Swiss Fed Inst Technol, ETH, Elect Power Syst Grp, ETL, CH-8092 Zurich, Switzerland
[3] Univ Illinois, Dept Elect & Comp Engn, UC, Urbana, IL 61801 USA
关键词
CSC and CLF; FACTS; QBT; UPFC;
D O I
10.1109/59.962414
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Controllable Series Devices (CSD), i.e., series-connected Flexible AC Transmission Systems (FACTS) devices, such as Unified Power Controller (UPFC), Controllable Series Capacitor (CSC) and Quadrature Boosting Transformer (QBT) with a suitable control scheme can improve transient stability and help to damp electromechanical oscillations. For these devices, a general model, which is referred to as injection model, is used. This model is valid for load flow and angle stability analysis and is helpful for understanding the impact of the CSD on power system stability. Also, based on Lyapunov theory a control strategy for damping of electromechanical power oscillations in a multi-machine power system Is derived. Lyapunov theory deals with dynamical systems without inputs. For this reason, it has traditionally been applied only to closed-loop control systems, that is, systems for which the input has been eliminated through the substitution of a predetermined feedback control. However, in this paper, we use Lyapunov function candidates in feedback design itself by making the l.yapunov derivative negative when choosing the control. This control strategy is called Control Lyapunov Function (CLF) for systems with control inputs.
引用
收藏
页码:689 / 694
页数:6
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