Simulation and Analysis of Static Var Compensator with Matlab (original) (raw)
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Enhancement of Power System Transient Stability Using Static Var Compensator
2013
Power systems are continuously subjected to various types of disturbances which in turn cause the problem of losing stability. As the problem of transient stability is a crucial issue, the tools for mitigating such a sensitive problem have an important significance. Static VAR Compensator (SVC) can control reactive power and therefore is used to improve transient stability as well as the voltage profile. In this paper the mathematical model of the power system equipped with an SVC is systematically derived and the parameters of the SVC are modeled into the power flow equations and used in the control strategy, the SVC is modeled in a 5-bus system and a 30-bus system and implemented in Newton-Raphson load flow algorithm in order to control the voltage of the bus to which the SVC is connected to in a MATLAB written program, the contribution of the SVC to transient stability was tested and verified.
Modelling and Simulation of Static Var Compensator (SVC) in Power System Studies by MATLAB
This paper presents the modelling and simulation of Static Var Compensator (SVC) in power system studies by MATLAB. In the first step, we have modeled mathematically with MathCAD how to analyze the rating of SVC (Boudjella, 2008). In second step, we have conferred modelling of SVC in power system to analyze its behaviour operating with in control range and outside of control range and how to perform power system studies which is anchored with load flow analysis for SVC realization. In the third step, we have been modelling separately the SVC transfer functions with open control loop in the respective control elements: measuring module, thyristor susceptance control module and voltage regulator module, and we have used lag/led compensators theories to configure open and close loop transfer function with respective gain/phase margin. At the final step, we have controlled the voltage and the reactive power transit in the power system, by SVC device.
Modeling and Simulation of Static Var Compensator for Voltage Control Using MATLAB/SIMULINK
— Electricity has now been Interconnected power system has been an inherent part of the todays electrical generation. It has becoming more and more complex as there are multiple ways of generations, transmission and distribution. So there is great challenge for proper flow of power and ensuring the system stability. Despite the various use of classical controllers (mechanical switching devices), the implementation of high performance devices is encouraged. The modern system that has the ability of varying the power flow parameters like voltage, impedance, admittance, power angle, damping oscillation etc. in order to enhance the power flow capability is FACTS (Flexible Alternating Current Transmission). Among various FACTS devices, SVC is one of the most popular, reliable and economic controller used in modern power system. It is acquired to have very good design and performance analysis of the SVC device for its better working in the power network. Static Var Compensators are being increasingly applied in electric transmission systems to economically improve voltage control and post-disturbance recovery voltages that can lead to system instability. An SVC provides such system improvements and benefits by controlling shunt reactive power sources, both capacitive and inductive, with power electronic switching devices.
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 2014
Voltage stability of a system is affected by reactive power limit of the system. FACTs devices improve the reactive power flow in system thereby improving voltage stability and these are used for controlling transmission voltage, Power flow, dynamic response and reducing reactive losses in transmission lines. This paper explores the effect of SVC on static voltage stability and presents the effect of Static VAR compensator (SVC) on Voltage Profile & Reactive Power for variable load conditions is investigated and presents static methods like Modal Analysis, Two Bus Thevenin Equivalent and Continuation Power Flow methods to predict the voltage collapse of the bus in the power system. WSCC 3-machine, 9-bus system has been used to demonstrate the ability of SVC in improving the voltage stability margin. These FACTs controllers help to increase the load ability margin of the power network. Modelling & simulation have been carried out using MATLAB/SIMULINK Software.
Voltage Stability Improvement using Static VAR Compensator (SVC) in Power System
— Now a days the power system are operated nearer to their stability limits due to economics and environmental reason and due to of this, the secure operation of power system is very important and challenging issue. A system enters a state of voltage instability when a disturbance occurs, increase in load demand & change in system conditions because of voltage collapse. Based on review, to compensate this problem the SVC is used in transmission system. These papers investigate the effect of Static Var Compensator (SVC) on voltage stability and improvement of that stability in power system. In this paper shunt FACTS devices SVC is used in a transmission line for improving a voltage profile and stability. MATLAB Simulink platform has been used in this study. The voltage at various buses is calculated and weak buses are identified to place the FACTS devices to improve the voltage stability limits are analyzed before and after the placement of svc.
Impact of Static Var Compensator (SVC) Installation in Power System Stability
2020
The research is proposed the modeling and analysis of Static Var Compensator (SVC) for stability improvement in power system. This is achieved by modeling a test system 220kV, 50Hz, and 100KVA base in long transmission line. Furthermore, the MATLAB/Simulink software is used to modeling the system in the normal condition and the fault condition of test system. The simulation results demonstrate the effectiveness and robustness of the proposed SVC on stability improvement in power system
This paper describes the effects of static VAR compensator on varying voltages in the system and the role of SVC in stabilizing these voltages. SVC is a relatively new technique for stabilizing the system voltages. It can control voltage accurately, continuously and rapidly. It helps in improving the transient stability of the system and voltage Variations due to sudden surges like lightning etc. The most important quality of SVC is that it can provide both the inductive and capacitive power as required. Simulink toolboxes are used in this paper to construct the static VAR compensator. The SVC consist of two main parts, Thyristor Switched Capacitor (TSC) and Thyristor Controlled Reactor (TCR). There are 3 TSC units and 1 TCR unit used in designing SVC. The TSC units will provide the capacitive power when the system voltage decreases than the rated voltage. The capacitive unit has the leading properties. In case the system voltage decreases by a large magnitude, multiple TSC units will be operated at the same time. Whereas TCR unit provides the inductive power when the system voltage increases than the rated voltage. The inductive unit has the lagging properties. A programmable voltage source is used in the simulations to vary the system voltages as desired by the user to check the response of the SVC controller. The author has also visited and reviewed the practical implementation of the SVC at one of the grid station and has used the same parameters in this paper as in the system implemented at the grid station. The SVC installed at the grid station has not been energized yet. This paper helps the author to compare the results of the simulations of the SVC implementation with that of practical one once the SVC is energized at the grid station. The results of the report show that the SVC works very effectively in keeping the system voltage stable in case of sudden Variations in voltages and reacts very quickly to the Variations. It can be concluded from the results that the SVC is an important part of the power system for the continued stability and reliability of the system.
Power Flow Control Analysis of Transmission Line Using Static VAr Compensator (SVC)
Control of reactive power and voltage constitute part of the major challenge in the power system industry. Adequate absorption or injection of reactive power into electric power transmission systems solves power quality problems like voltage profile maintenance at all power transmission levels, transmission efficiency and system stability. Globally, there is increasing demand for electricity to feed the technology-driven economy, while the commensurate expansion of power generation and transmission to meet up with such demand has been severely limited due to inadequate resources and environmental factors. Flexible AC Transmission System (FACTS) controllers, such as the Static VAr Compensator (SVC), employ latest technology in the design of power electronic switching devices for electric power transmission systems to control voltage and power flow, and improve voltage regulation without the need to expand the power generation and transmission facilities. In this work, the capability of SVC in stabilizing power system's voltage through reactive power compensation was investigated. Power flow equations involving voltage drop with/without SVC were developed. Modeling equations for SVC were also developed and used to determine its parameters. The Nigeria 330kV network, 28-bus power system used for the study was modeled using MATLAB/SIMULINK software. From the simulations, the compensated and uncompensated voltages at each of the 28 buses were evaluated. It was observed from the analysis that some buses in the network had very weak voltage profile consequent to either excessive generation or absorption of the reactive power at such buses. It is therefore pertinent to note that not all the buses within the network need voltage compensation and as such, only buses with very weak voltage profile require the incorporation of SVC. Hence it can be concluded that in order to enhance the transmission system performance of the Nigerian 330kV power system, the control of the voltages at certain buses through the application of SVC is required.
2016 International Conference on Recent Advances and Innovations in Engineering (ICRAIE), 2016
Power systems are complex systems consisting of large number of generating units and interconnected network of transmission lines. The voltage stability is an issue of prime importance in this complex power system network since the demand for electric power is increasing drastically. The control of reactive power in the transmission lines will enhance the voltage stability of the power system network. This paper presents the design and implementation of the Static V AR Compensator (SVC) in the transmission network for reactive power flow control to improve the voltage stability. The proposed method detects automatically the optimal number of SVCs required for the control of reactive power. The detailed simulation study has been carried out in MATLAB/Simulink environment.
Power system stability is defined as the ability of power system to preserve it's steady stability or recover the initial steady state after any deviation of the system's operation. This paper will discuss how SVC has successfully been applied to control dynamic performance of transmission system and regulate the system voltage effectively. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a powersystem is therefore a very important and challenging issue. Shunt FACTS devices play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations. In this paper shunt FACTS device-SVC is used in a two area power system for improving the power system stability. MATLAB software has been used in this study.