A simple neuro-controlle r for a synchronous generator is presented in this paper. The controller performs the function of the terminal voltage control. By representing the proposed neuro-controller in s-domain, its parameters to ensure system stability can be obtained analytically. Results of simulation studies on a non-linear seventh order generator model with the neuro-controller using calcu...

The effectiveness of power system stabilizer (PSS) in providing damping and improving the dynamic response is well established. In this paper focuses, the performance of single machine infinite bus is studied with fuzzy power system stabilizer (FPSS). The generator is represented by the standard K-coefficients as second order system. The mechanism to discuss the rules is described and the perfo...

Damping of inter-area electromechanical oscillations is one of the major challenges to the electric power system operators. This paper presents Gravitational Search Algorithm (GSA) for tuning Static Synchronous Series Compensator (SSSC) based damping controller to improve power system oscillation stability. In the proposed algorithm, the searcher agents are a collection of masses which interact...

The Static Synchronous Series Compensator (SSSC) is one of the recently developed Flexible AC Transmission System (FACTS) devices. In this paper, the SSSC is realized using a 48-pulse voltage source inverter. Fuzzy logic controllers are designed to operate the SSSC in the automatic power flow control mode. The parameters of the fuzzy controllers are varied widely by a suitable choice of members...

Abstract: A controllable series device (CSD) is used to damp the transient oscillations in a power system. The power system studied here is the single machine infinite bus (SMIB) and the CSD used is a controllable series capacitor (CSC). Interconnection and damping assignment passivity-based control (IDA PBC) is used for controller synthesis. The SMIB system is described with two different type...

Unified power flow controller (UPFC), as one of the most important FACTS devices, can be used to increase the damping of power system oscillation. The effect rate of this controller on increasing oscillation damping depends on the appropriate selection of input controlling signal, optimal selection of UPFC controlling parameters, and its proper position in power system. In this paper, the capab...

This paper presents an alternate approach for designing power system stabilizers (PSS) based on variable structure control to enhance small signal stability of Single Machine Infinite-Bus Power System (SMIB). The state feedback gains and switching surface have been tuned using Global Optimization (multistart clustering GO) for an Eigen value based performance index. The robustness of the propos...

This paper presents a simplified nonlinear observer for power systems by exploring the special features of the nonlinear power system model. Rather than directly applying the existing nonlinear observer theory to the 6 order nonlinear power system model, the model is first decoupled into a 3 order nonlinear subsystem and a 3 order linear subsystem. Low order observers are designed for each subs...

Power system transient stability analysis requires an appropriate integration time step to avoid numerical instability as well as to reduce computational demands. For fast system dynamics, which vary more rapidly than what the time step covers, a fraction of the time step, called a subinterval, is used. However, the optimal value of this subinterval is not easily determined because the analysis...

-----------------------------------------------------------ABSTRACT----------------------------------------------------------It is very important to maintain supply reliability under the deregulated environment. The transient stability problem is one of the major concerns in studies of planning and operation of power systems. Although the equalarea criterion method is useful in determining the ...