Design of variable-structure load-frequency controller using pole assignment technique

Multi-Area Frequency and Tie-Line Power Flow Control by Fuzzy Gain Scheduled SMES

“…These are insufficient because of changes in operating points during a daily cycle [Benjamin et al, 1978;Nanda et al, 1988;Das et al, 1990;Mufti et al, 2007;Nanda et al, 2006& Oysal et al, 2004 and are not suitable for all operating conditions. Therefore, variable structure controller [Benjamin et al, 1982;Sivaramaksishana et al, 1984;Tripathy et al, 1997& Shayeghi et al, 2004 has been proposed for AGC. For designing controllers based on these techniques, the perfect model is required which has to track the state variables and satisfy system constraints.…”

Adaptive Fuzzy Sliding Mode Power System Stabilizer Using Nussbaum Gain

“…Disturbances, varying loading conditions and therefore frequently changing operating point were not taken into consideration [8−11] . However, a lot of researches about the design of power system stabilizers have been conducted, using a wide range of strategies, such as sliding controller [12] , adaptive controller [13−15] , and adaptive fuzzy controllers [16,17] . A comparison of some approaches to designing power system stabilizers was presented in [18].…”

A Poof of Utkin's Theorem for the SI Uncertain Integral linear Case

“…The proper design of the sliding surface can determine the almost output dynamics and its performances [5]. Many design algorithms including the linear(optimal control [6] [9], geometric approach [7], pole assignment [8], eigenstructure assignment [9], differential geometric approach [10], integral augmentation[5] [13][21], output feedabck [15], Lyapunov approach [16][17], Ackermann's formula [18], dynamic sliding surface [19]), and nonlinear [14][20] techniques are reported. However, in these sliding surface design methods so far except [5], the existence condition of the sliding mode on the predetermined sliding surface is not proved.…”