Fuzzy Controlled STATCOM for Improving the Power System Transient Stability (original) (raw)
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Power System Transient Stability Improvement Using Fuzzy Controlled STATCOM
2006 International Conference on Power System Technology, 2006
In this paper a fuzzy logic based controller for STATCOM is used to improve power system transient stability. As opposed to the modern control theory, fuzzy logic design is not based on the mathematical model of the process. The controller designed using fuzzy logic implements human reasoning that can be programmed into fuzzy logic language (membership functions, rules and the rule interpretation). The nonlinear fuzzy controller is proposed to supply a supplementary control signal to STATCOM to increase the critical clearing time and overcome the uncertainties existing in the power systems. Proposed method is implemented in a single machine infinite bus system and the results are compared with conventional energy function based controllers.
Power System Stability Improvement Using Self-Tuning Fuzzy Logic Controlled STATCOM
EUROCON 2007 - The International Conference on "Computer as a Tool", 2007
This paper presents the application of a fuzzy logic controlled Static Compensator (STATCOM) to improve stability of power system. The nonlinear fuzzy logic controller is used to overcome the problems generated by different uncertainties exist in power systems. Different input variables are used to design the controller. Parameters of the proposed controller are adjusted by means of Neural Network techniques to improve performance of the system. Proposed controller is implemented on a single machine infinite bus system to confirm the performance of the controller through simulation results.
In recent years, with development in power electronics technology, the static synchronous compensator (STATCOM) is assuming a significant role in reactive power compensation and transient stability enhancement in modern power systems. This paper investigates application of a role based fuzzy control technique for controlling a STATCOM at steady and transient states. Fuzzy controllers are designed for main and supplementary controllers of STATCOM. The main controller is used for regulating of AC bus voltage and the supplementary controller is designed for controlling of DC capacitor voltage. This study demonstrates that STATCOM considerably improves transient stability of power system after occurring fault and load changing. The efficacy of the control strategy is evaluated by PSCAD/EMTDC simulation programs
Improving Transient Stability in Power Systems by Using Fuzzy Logic Controlled SVC
International Journal of Robotics and Automation (IJRA) , 2018
This paper presents the capability of a fuzzy logic based stabilizer used for generating the supplementary control signal to voltage regulator of static VAR compensator (SVC) for improving damping oscillations in power systems. Generator speed deviation and line active power were chosen as input signals for the fuzzy logic controller (FLC). The quantity of reactive power supplied/absorbed by SVC is determined based on the two input signal and deviation of terminal voltage at each sampling time. The effectiveness and feasibility of the proposed control is demonstrated with Single Machine Infinite Bus (SMIB) system and multi machine system which show improvement over the use of a fixed parameter controller. It has been observed that a robust controller is obtained with fuzzy logic controller.
Implementation of PSS and STATCOM Controllers for Power System Stability Enhancement
In emerging electric power systems, enlarged communication often lead to the situations where the structure no longer remains in secure operating region. The flexible Ac transmission system (FACTS) controllers can take part in an important role in the power system security enhancement. However, due to high capital investment, it is necessary to locate these controllers optimally in the power system. This paper presents an application of fuzzy control to determine the control signal of static compensator (STATCOM) for improvement of power system stability. STATCOM is a shunt type FACTS device which is used in power system primarily for the purpose of voltage and reactive power control. A fuzzy logic based supplementary controller for Static Compensator(STATCOM) is developed which is used for damping the rotor angle oscillations and to improve the transient stability of the power system. Generator speed and the electrical power are chosen as input signals for the fuzzy logic controller (FLC). A Standard 3-phase, six bus system is taken as test system to evaluate the FACTS device (STATCOM) performance for proposed controllers PI and fuzzy with Power System Stabilizer in multi machine system.
Enhancement of a Power System Transient Stability Using Static Synchronous Compensator STATCOM
2013
In modern power system utilities, increased power demand often lead to the situation where the system no longer remains in secure operating region. Flexible AC Transmission Systems (FACTS) controllers can play an important roll in power system security enhancement. The goal of FACTS devices study is to measure their impact on the state of the electrical networks into which they are introduced. Their principal function is to improve the static and dynamic properties of the electrical networks and that by increa sing the margins of static and dynamic stability. In this paper the modeling of Static Synchronous Compensator (STATCOM) within Newton-Raphson power flow equations has been presented, discussed, implemented and the transient stability of a power system was tested when three phase fault is applied at a certain branch of the power system. Case studies are carried out on a 5bus and a 30-bus test systems to demonstrate the effectiveness of the proposed model.
Impact of PSS and STATCOM on dynamic parameters of power system based on neuro-fuzzy controllers
2016 13th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2016
This paper studies the impact of leveraging both static synchronous compensator (STATCOM) and power system stabilizer (PSS) on multi-machine power systems. Considering a standard IEEE 9-bus test power network, the classic and intelligent controllers are applied and analyzed to achieve a desirable system performance. Simulated tests show the usefulness of ST-ATCOM on network power quality in terms voltage profile. In addition, it can significantly improve the damping oscillations of synchronous generator under normal and abnormal network conditions. The PSS also contributes to improving the synchronous generator parameters. It is also observed that using intelligent controllers with STATCOM and PSS leads to a better performance relative to the classic controllers.
Transient Stability Enhancement of Grid by Using Fuzzy Logic Based Statcom
This paper proposes Fuzzy Logic Based STATCOM. It regulates the voltage at the point of common coupling (PCC) by injecting reactive power. This device also plays a vital role in enhancing stability for small and large transient disturbances in power system. Simulations using MATLAB / SIMULINK are carried out to verify the performance of STATCOM using fuzzy controller. The result shows that fuzzy logic controller is a better choice for the STATCOM compared to the PI controller. Fuzzy logic controller forces the system to return back the steady state value faster than the PI controller. The fuzzy logic controller is robust and has a fast response during disturbance and parameters variation. Detailed study of control of STATCOM has been made, which include analysis of PLL, VSC, mathematical dq transformation has been explained.
Improved fuzzy logic controller for SVC in power system damping using global signals
Electrical Engineering, 2010
Static Var Compensator (SVC) is a shunt-type FACTS device, which is used in power systems primarily for the purpose of voltage and reactive power control. In this paper, an improved fuzzy logic-based supplementary controller for SVC is developed for damping the rotor angle oscillations and to improve the stability of the power system. The generator speed and the electrical power are chosen as global input signals for the proposed fuzzy logic controller (FLC). The effectiveness and feasibility of the proposed control is demonstrated with single-machine infinite bus (SMIB) system, three-machine nine-bus WSCC system and New England 10-machine system, which shows the improvement over the use of a fixed parameter controller and existing FLC.