An Adaptive Controller for Power System Load-Frequency Control

Robust load-frequency control for uncertain nonlinear power systems: A fuzzy logic approach

“…The description of the system variables and parameters is given in Table 1. The assumption on DP D k ðtÞ widely used in the literature [1][2][3][4][5][6] is adopted as follows:…”

“…The introduction of the deregulation policy to power system operation makes the load-frequency control (LFC) be refocused because the repeatedly deregulated power generation under the inevitable electricity market game provokes large deviation from the standard frequency of power systems. During the last three decades, various control strategies for LFC have been proposed [1][2][3][4][5][6]. In the literature, it is commonly conjectured that, since a normally operated power system is only exposed to small change in the vicinity of the load demand, a linearized model is enough to express the dynamic behavior of the system around the operating point.…”

Stabilizing decentralized robust controllers of interconnected uncertain power systems based on the Hessenberg form: Simulated results

“…The application of modern control theory to the load± frequency control (LFC) problem of interconnected power systems has attracted considerable attention in the literature over the past three decades (Elgerd and Fosha 1970, Calovic 1972, Chan and Hsu 1981, Pan and Liaw 1989, Malik and Kumar 1988, Rubaai and Udo 1994. LFC is responsible for maintaining the system frequency and the interchange power at their speci® ed values.…”

“…In view of this, some workers (Bengiamin and Chan 1982, Sivaramakrishna n et al 1984 have applied variable structure control to make the controller insensitive to plant parameter changes. On the other hand, recently, various adaptive control techniques have been proposed for dealing with large parameter variations (Valk et al 1985, Pan andLiaw 1989). In recent years, considerable eOE ort (Chen et al 1991 has been focused on the design of a robust load± frequency controller for interconnected uncertain power systems.…”

Robust two-degree-of-freedom controller for automatic generation control of multi-area system

“…The problem of controlling generator output in response to changes in system frequency and tie-line power interchange is known as automatic generation control (AGC). There has been considerable research work attempting to propose better AGC systems [1][2][3][4][5][6][7][8][9][10][11][12]. Numerous control methodologies such as classical controller [2,3], optimal control [4], adaptive control [5], fractional order controller [6,23,24], fuzzy logic control [7,8], and neural network controller [9,10] had been proposed by researchers over the past decades.…”