Fuzzy Logic Controller for Static Synchronous Series Compensator with Energy Storage System for Transient Stability Analysis

Problem statement: Power-Voltage curve provides very important information for voltage stability analysis. The exact short transmission line model consists of the resistance and reactance. The resistance causes in the active line loss. It is not easy task to achieve the power-voltage curve characteristics of power system with the exact short line model. Approach: This study applied the concept of the Newton-Raphson method to iteratively solve the nonlinear power flow equations. The power-voltage (P-V) curve characteristic of the system without line loss and with line loss were plotted and compared on various cases. Results: It was found from the study that the resistance of the line obviously provides negative effects on the voltage stability. The line loss causes in the decrement of the critical point. It was found that the leading power factor could increase the critical point of P-V curve. Conclusion: The exact short line model can be considered for voltage stability analysis of the system with the short transmission line.

Section: Introductionmentioning

confidence: 99%

Power-Voltage Characteristics of Power System with the Short Transmission Line

Kumkratug¹

2012

“…For proper reactive power exchange with power system, the STATCOM output voltage needs to be controlled efficiently. Non linear contrrol of shunt FACTS for duty power oscillation is given by (Kumkratug, 2011b), Fuzy logic controlled SSSC is presented by (Padma and Rajaram 2011), Grid voltage stability enhansment using PV based SSSC is.…”

Section: Introductionmentioning

confidence: 99%

Embedded Controlled Multi Level Voltage Source Inverter Based Distribution Statics Synchronous Compensator

Kishore¹

2014

“…It is becoming increasingly important to fully utilize the existing transmission system assets due to environmental legislation, rights-of-way issues, costs of construction and deregulation policies that introduced in recent years. A number of Flexible AC Transmission System (FACTS) controllers, based on the rapid development of power electronics technology, have been proposed for better utilization of the existing transmission systems (Magaji and Mustafa, 2009;Prechanon, 2010;Zarate-Minano et al, 2010;Omar et al, 2010;Padma and Rajaram, 2011).…”

Section: Introductionmentioning

confidence: 99%

The Mathematical Model and Simulation of Thyristor Controlled Series Capacitor in Medium Transmission Line

Kumkratug¹

2012

Problem statement: It is becoming increasingly important to fully utilize the existing transmission system assets due to environmental legislation, rights-of-way issues, costs of construction and deregulation policies that introduced in recent years. The Thyristor Controlled Series Capacitor (TCSC) has been proposed for the better control power flow and dynamic performance. The exact medium transmission line model consists of the resistance and reactance. Most of previous researches studies transient stability performance of the TCSC in SMIB System with neglecting the resistance of the line. Thus the fully capability of the TCSC on transient stability improvement of power system may not be applied. The consideration of the resistance causes in the difficulty of deriving the mathematical model. Approach: This study investigates the effect of the TCSC on transient stability of the power system with consideration the exact medium transmission line mode. The concept of two-port network is applied to simplify the mathematical model of the power system. The proposed method is tested on sample system and compared on various cases. Results: The first swing of rotor angle curve of the faulted system without resistance is obviously higher than that of with resistance whereas the second swing of the faulted system without resistance is slightly less than that of with resistance. The system with a TCSC can improve transient stability of power system. Conclusion: It was found from this study that the TCSC and resistance of the line can improve first swing of rotor angle. However, the resistance of the line provides the negative effect on second swing of rotor angle. The simulation results indicate that for practical medium line, the resistance is very import parameters for evaluating transient stability of power system.