Simulation Of Static Var Compensator Research Articles

Real-Time Simulation of Static VAR Compensator and Static Synchronous Compensator

In recent years, deregulation, open access, and co-generation in electrical power system are creating transmission voltage sags, swells, forced outages, and frequently followed by black-outs, congestion scenario, and many such problems. Reactive power limit is one of the major causes of voltage instability in the power system, and improving the system's reactive power handling capacity via Flexible AC transmission System (FACTS) devices is one of the remedies for prevention of voltage instability. The typical representatives of parallel FACTS devices for its avoidance are Static Synchronous Compensator (STATCOM) and Static VAR Compensator (SVC). Real-Time Simulator facilitates a physically large and spatially diverse or distributed power system to be accurately simulated in laboratory, and physical devices, like controllers or protection equipment can be tested in real time, even with introduction of faults, overloads, loss of generation condition, and with many more conditions for stability analysis purpose. This paper presents comparison of power flow parameter and the performance characteristic of the controllers on Real-Time Simulator OPAL-RT-OP4510 with SVC, and STATCOM. The waveforms of voltage, current, active and reactive power during the Real-Time execution are taken from the simulation environment to the outside world, using input/output devices, and seen on Digital Storage Oscilloscope (DSO). The validation is done on multi-machine-9-bus system. The results of Real-Time Simulation during LLLG fault indicate that STATCOM supplies reactive power independent of line voltage, whereas SVC behaves as constant susceptance when the reactive power required by the system is above its rated capacity. The power flow parameters with both the controllers are comparable during steady state operation.

A Voltage Improvement of Transmission System using Static Var Compensator via Matlab/Simulink

<p class="IJASEITAbtract">High demand in electricity consumption is rising and modern society would case to function without access to electricity. The volume of power transmitted and distributed are increasing, these need the requirements for high quality and reliable supply. At the same time, rising the costs and the growing environmental concerns make the process of develop a new power transmission line make complicated and the time consuming. One of alternatives to solve the issues is installed the Flexible AC Transmission System (FACTS). This research presents to modeling and simulation of Static Var Compensator (SVC) in the power system network using Matlab/Simulink Software. The objective function of this research is improvement the voltage of the system with four cases study for validation. From the simulation results shown that the SVC installation gives the effect to voltage of system.</p>

The Mathematical Model and Simulation of Static Var Compensator in Medium Transmission Line

Problem statement: The Static Var Compensator (SVC) have been widely investigated its effect on transient stability of Single Machine Infinite Bus (SMIB) system. The exact medium transmission line model in power system consists of the series resistance series reactance and shunt capacitance. It is not easy task to obtain the mathematical model of the SVC with the exact medium transmission line model for investigating transient stability performance. Approach: This study applied the concept of the two-port network to simplify the mathematical model of the power system. The full capacity of the SVC on transient stability improvement of the SMIB with the medium transmission line was then investigated. The proposed method was tested on sample system and compared on various cases. Results: The first swing of rotor angle curve of the faulted system without resistance was obviously higher than that of with resistance whereas the second swing of the faulted system without resistance was slightly less than that of with resistance. The system with a SVC could improve transient stability of power system. Conclusion: The SVC and resistance of the line can improve first swing of rotor angle. The resistance of the line provides 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.

Modeling and simulation of SVC and TCSC to study their limits on maximum loadability point

This paper presents the steady-state modeling of static var compensator (SVC) and thyristor controlled series capacitor (TCSC) with their control and limits. Handling of limits and control mode switching are presented and discussed. Bifurcation analysis is applied in order to find the optimal location and rating of these devices and a continuation power flow is used to evaluate the effects of these devices on system loadability. Eigenvector analysis applied at the maximum loading point is used to rank the most critical voltage buses. After that, it would be possible to optimize location, sizing and control modes of SVC and TCSC in order to achieve maximum enhancement of system loadability. The models and methodology for placing and designing SVC and TCSC are tested in a 173 bus AC/DC system. Performance factors are defined to evaluate the efficiency of SVC and TCSC on different conditions.

Modeling and simulation of SVC and TCSC to study their limits on maximum loadability point

This paper presents the steady state modeling of static var compensator (SVC) and thyristor controlled series capacitor (TCSC) with their control and limits. Handling of limits and control mode switching are presented and discussed. Bifurcation analysis is applied in order to find the optimal location and rating of these devices and a continuation power flow is used to evaluate the effects of these devices on system loadability. Eigenvector analysis applied at the maximum loading point is used to rank the most critical voltage buses. After that, it would be possible to optimize location, sizing and control modes of SVC and TCSC in order to achieve maximum enhancement of system loadability. The models and methodology for placing and designing SVC and TCSC are tested in a 173 bus AC/DC system. Performance factors are defined to evaluate the efficiency of SVC and TCSC on different conditions.