Flexible AC Transmission Systems (FACTS) devices have been used in power systems since the 1970s for the improvement of its dynamic performance This paper presents a review on the research and developments in the voltage stability improvement by using FACTS controllers In this paper several technical issues related to FACTS installations have been highlighted and performance comparison of different FACTS controllers have been discussed In addition, real-world installations and semiconductor technology development have been reviewed and summarized This paper also includes the main causes of voltage instability and power scenario in India In order to deal with the voltage stability problem, the solutions with FACTS-controllers provide voltage support and/or appropriately co-ordinated control actions Authors strongly believe that this survey article will be very much useful to the researchers for finding out the relevant references in the field of voltage stability improvement by using FACTS controllers in power system environments

Voltage stability improvement in power systems using facts controllers: State-of-the-art review

https://www.econstor.eu/bitstream/10419/244015/1/1693679809.pdf

A comprehensive survey on enhancement of system performances by using different types of FACTS controllers in power systems with static and realistic load models

Controlled series compensation in coordination with double order SVS auxiliary controller and induction M/C for repressing the torsional oscillations in power systems

Coordination of TCSC and SVC for improvement of power system performance with NN-based parameter adaptation

In this paper, a new static VAr system (SVS) control scheme for damping torsional modes due to subsynchronous resonance (SSR) in a series compensated power system has been developed. The proposed scheme, called as the Narendra Kumar-subsynchronous resonance (NK-SSR) damping scheme, utilizes the effectiveness of combined reactive power and frequency (CRPF) SVS auxiliary controller in coordination with an induction machine-damping unit (IMDU) coupled to the T-G shaft. The studies are conducted on the first IEEE benchmark model. The scheme stabilizes all the torsional modes over a wide operating range of power transfer. The digital computer simulation study, using a nonlinear system model exhibits a remarkable improvement in the system transient performance. The optimal location of IMDU along the T-G shaft has been determined by performing eigen value analysis. It is found that locating IMDU after the IP turbine yields the maximum damping effect.

Damping SSR in a series compensated power system

Application of an auxiliary controlled static var system for damping subsynchronous resonance in power systems

In this paper, a novel SVS controller known as the combined reactive power and frequency (C.R.P.F.) auxiliary controller has been developed and incorporated in the SVS control system located at the middle of a series-compensated long transmission line. The proposed SVS auxiliary controller stabilizes all the torsional modes over a wide operating range. A digital computer simulation study has been performed, using a nonlinear system model, to illustrate the effectiveness of the proposed SVS auxiliary controller.

Auxiliary-controlled static var system for damping subsynchronous resonance in power systems

Application of static var system auxiliary controllers to improve the transient performance of series compensated long transmission lines

The paper presents a comparative performance evaluation of SVS auxiliary controllers for transient stability enhancement of long transmission lines over a wide operating range. The SVS has been considered located at the middle of the transmission line. The application of the auxiliary controllers considerably enhances the system damping and unstable system modes are stabilized. A new controller, namely Combined Reactive Power and Frequency (C.R.P.F.) auxiliary controller, has been developed for the SVS located at the middle of the transmission line. To illustrate the comparative effectiveness of the auxiliary controllers under disturbance condition, a digital computer simulation study has been performed.

Static var system auxiliary controllers for transient stability improvement of power systems

In this paper, the coordinated application of the controlled series compensation (CSC) and the SVS auxiliary controllers has been demonstrated for the dynamic and transient performance enhancement of a series compensated long transmission line. An SVS controller, known as the combined reactive power and frequency (CRPF) auxiliary controller, has been developed and incorporated in the SVS control system located at the middle of the transmission line. A digital computer simulation study, using a nonlinear system model, has been performed to illustrate the comparative effectiveness of the CSC and the SVS auxiliary controllers developed.

M. P. Dave

Papers

Application of an auxiliary controlled static var system for damping subsynchronous resonance in power systems

Auxiliary-controlled static var system for damping subsynchronous resonance in power systems

Application of static var system auxiliary controllers to improve the transient performance of series compensated long transmission lines

Static var system auxiliary controllers for transient stability improvement of power systems

Auxiliary controlled SVS and controlled series compensation for flexible AC transmission systems