LMI-based Wide-area Robust Damping Control

Abstract

This paper presents a new strategy for the design of wide-area robust controller (WRC) to damp the inter-area mode oscillations of power systems. Utilizing both local and remote non-delayed signals as controller inputs, mixed H 2 /H ∞ outputfeedback design procedure is applied. Considering the specific power system construction, the remote feedback signal is chosen to associate with H 2 performance which is useful to handle stochastic aspects; whereas the local signal is chosen to associate with H ∞ performance which is primarily concerned with model uncertainties. The feedback gain matrix is obtained through solving a family of linear matrix inequalities (LMIs). Experiments on a 4-generator test system demonstrate the effectiveness of the new controller and robustness with respect to variations of the system operating conditions. The results are also compared with the conventional PSS damping control.

Fault tolerant emergency control to preserve power system stability

“…In [21], wide-area information was used in a hierarchical control scheme. A level of fault tolerance was obtained in ( [22], [23]) where a robust wide-area controller used mixed H 2 /H ∞ output-feedback control. Adaptive stabilisers using wide-area information were designed in [24] and [25].…”

Stabiliser Fault Emergency Control using Reconfiguration to Preserve Power System Stability

“…In [Kamwa et al, 2001], wide-area information was used in a hierarchical control scheme. A level of fault tolerance was obtained in (Chen et al [2006], Chen and Guo [2005]) where a robust wide-area controller used mixed H 2 /H ∞ output-feedback control. Adaptive stabilisers using wide-area information were designed in [Zhang et al, 1993] and [Ni et al, 2000].…”