Design of a Nonlinear Global Integrated Controller Based on Wide-area Information

Nonlinear robust control of power system considering wide‐area signals' delay and incompleteness

“…A model for the ith generator with both excitation and turbine control loops can be written as follows under the COI reference frame [9,15,16] …”

“…With the wide application of synchronized phase measurement units (PMUs) in the power system, the wide-area measurement system (WAMS) has enabled the use of a combination of measured signals from remote locations for global control purpose. It is found that if remote signals from one or more distant locations of the power system are applied to the design of the local controller, the system dynamic performance can be enhanced [6][7][8][9]. Reference [6] proposes a decentralized/hierarchical damping control structure, in which wide-area signals-based PSS are used to provide an additional damping.…”

“…The SPSS uses a rule-based fuzzy-logic system and robust PSS to deal with uncertainties introduced by nonlinear terms and operating conditions. Reference [9] presents a novel nonlinear global integrated controller based on the wide-area information under the centre of inertia reference frame (COI). This controller makes the relative rotor angle to the centre of angle return to its pre-disturbance value by modulating excitation voltage and turbine valve, and is considered as a 'control the local to serve the global' controller.…”

Hierarchical hybrid control for improving comprehensive performance in smart power system

“…So far, in power systems, due to the imperfection of control technology or lack of sharing of information, though the automation level of local continuous controller that handle small disturbance problems is very high [1][2][3][4], whole system control, especially discrete event controls that handle large disturbance problems are disrupted and isolated, and there between the continuous dynamical control and discrete event management has not formed an organic entirety. As a result, the interactive relation between discrete event management and continuous dynamical control cannot be perfectly coordinated in a real-time manner.…”

Study of delay-independent decentralized guaranteed cost control for large scale systems

“…These time delays just arise from highly complex and "large" in dimension. Over the past decade and before, many researchers have paid a great deal of attention on control problems of large scale systems and have gained great harvest [1][2][3][4][5][6]. However, in the face of the complex integrated characteristic of nonlinearities, interconnection, time delays and uncertainties in the large scale systems, there have hardly any methods that are able to simultaneously handle the stability and control performances better, because these complex dynamics greatly degrade stability and performances of large scale systems.…”