Fixed-order controller for reduced-order model for damping of power oscillation in wide area network

Stability analysis and stabilization of delayed reduced-order model of large electric power system

“…Among these three modes, the most important mode exhibits damping ratio of 0.158 and frequency of 0.387 Hz. The study suggested that the entire power network may be divided into five areas, with each area represented by the generator that participates dominantly to 0.387 Hz mode. The equivalent representation of network is shown in Figure (a).…”

“…The equivalent representation of network is shown in Figure (a). The two generators PPS5 and GPS4 geographically lie at extreme opposite ends of this radial power system and have highest participation factor to the said mode . Thus, an equivalent representation with selection of input–output variables of one of these generators may be obtained for stability analysis and wide‐area controller design with time delay effects included as discussed in following sections.…”

“…The measurement of voltage signal of the AVRs on a remote generator or even voltage angle at remote bus through PMUs may experience a delay in the range of 100 ms . The use of reduced‐order model of power system for wide‐area controller design may be considered to include time delay at input–output variables to take into account the transmission of remote signals through PMUs. The schematic of reduced‐order model with its delayed input–output variables including WAMS controller implementation is shown in Figure .…”

A novel simplified approach to complexity of power system components including nonlinear controllers based model reduction

“…However, at present, the relevant research on this problem has not been reported. Compared with the existing linear or nonlinear model reduction problems, the component complex model reduction has its particularities: (1) it has the DA structure because a component serves as a subsystem of the whole power system; and (2) it includes the complicated nonlinear controller. In the field http://dx.doi.org/10.1016/j.ijepes.2015.05.013 0142-0615/Ó 2015 Elsevier Ltd. All rights reserved.…”

“…However, the global model is very complicated since the power system is composed of numerous components with controllers. Without simplification, the global model cannot meet the actual requirements [1]. In order to obtain the reduced global model, one can simplify the component models at local level (component model reduction), or simplify the system model as a whole at global level (system model reduction).…”