In current years, growth of load demand rises day by day, but this growth does not ensue the same in equipment’s of power systems and therefore operators have to use supreme available capacity of systems to fulfill load demands. These... more
In current years, growth of load demand rises day by day, but this growth does not ensue the same in equipment’s of power systems and therefore operators have to use supreme available capacity of systems to fulfill load demands. These activities make power systems so unpredictable. One of best ways to develop reliability of systems is using FACTS devices. In this project the voltage sag occurred during overloading condition is observed and it can be mitigated by using two type of FACTS devices such as STATCOM and UPFC. FACTS devices can regulate the reactive and active power control as well as adaptive control of voltage-magnitude instantaneously because of their fast control characteristics and flexibility. Placement of these devices in appropriate location can lead to maintain bus voltages in preferred level and control in line flow and so increase voltage stability margins. Performance assessment is supported by the simulation results on IEEE 6 bus system under overloading conditions using MATLAB.
Improvement in power flow by the deliberate placement of UPFC is demonstrated in this paper. The demonstration uses a nine bus system to show the effectiveness of UPFC when a high higher load impacts the system. The circuit is first... more
Improvement in power flow by the deliberate placement of UPFC is demonstrated in this paper. The demonstration uses a nine bus system to show the effectiveness of UPFC when a high higher load impacts the system. The circuit is first simulated first without a UPFC and the power flow studied. Simulation with the help of MATLAB software amply demonstrates the controllability of transmission parameters with the introduction of UPFC. Dynamic performance is also seen to be improving by introduction of UPFC at a strategic location in the system.
— In this paper, a method of improving power quality of power system using the unified power flow control is proposed. A unified power flow controller is a flexible ac transmission system (FACTS) device for providing fast-acting reactive... more
— In this paper, a method of improving power quality of power system using the unified power flow control is proposed. A unified power flow controller is a flexible ac transmission system (FACTS) device for providing fast-acting reactive power compensation on a high-voltage electricity transmission network. The controller can control active and reactive power flow in transmission line. The UPFC uses a combination of static synchronous compensator (STATCOM) and a static synchronous series compensator (SSSC) coupled via a common dc voltage link. This report also includes control methods, MATLAB simulation results and other key information.
It is well known that for computer simulation and analysis of power systems both planning and operation are necessary. Computer simulation requires an appropriate mathematical model that many inter-related linear, nonlinear, differential... more
It is well known that for computer simulation and analysis of power systems both planning and operation are necessary. Computer simulation requires an appropriate mathematical model that many inter-related linear, nonlinear, differential and algebraic equations of the system. Such mathematical model is needed for analysis and improves power system dynamic stability performance and also design a suitable controller. This paper provides comprehensive development procedure and final forms of mathematical models of a power system installed with UPFC and controller UPFC using linear quadratic regulator techniques for stability improvement. The impacts of control strategy on power system multi machine installed with UPFC, without UPFC and with controller UPFC at different loading and operating conditions are discussed. The accuracy of the developed models is verified through comparing the study results with those obtained from detailed MATLAB programming. In this paper settling time analysis also have been done for justification of the stability improvement.
On line tuning of FACTS based damping controller is a vital decisive task in power system. In this regard two things need to be addressed, one is selection of a proper controller and another one is selection of a powerful optimization... more
On line tuning of FACTS based damping controller is a vital decisive task in power system. In this regard two things need to be addressed, one is selection of a proper controller and another one is selection of a powerful optimization technique. In this work Grey Wolf Optimizer (GWO) technique is proposed to tune parameters of PI and lead lag controller based on UPFC to damp intra plant and inter area electromechanical oscillations with single and multi machine power system. A broad comparison has been performed with eigen value analysis between optimized PI and lead lag damping controller subject to different disturbances in power system. The recently revealed GWO, standard PSO and DE techniques are explicitly employed to tune UPFC based PI and lead-lag controller parameters. The system response predicts that performance of GWO is much better than PSO and DE techniques, and also lead lag controller is a better choice than PI controller pertaining to design of UPFC based damping controller.
devices uses power electronics components to maintain controllability and capability of electrical power system FACTS controller includes unified power flow controller (UPFC), Static synchronous compensators(STATCOMs), Thyristor... more
devices uses power electronics components to maintain controllability and capability of electrical power system FACTS controller includes unified power flow controller (UPFC), Static synchronous compensators(STATCOMs), Thyristor controlled series compensators (TCCs), Static series synchronous compensators (SSSCs) and Static VAR compensators (SVCs), are able to modify voltage, phase angle and impedance at particular bus in a power system. The (UPFC) is the most versatile and complex power electronic equipment that has emerged for the control and optimization of power flow in electrical power transmission system. In this paper we see how the UPFC increases the transmission capacity and reduce the power congestion in the transmission line. This paper shows the results that we obtained by implementing a Transmission system in MATLAB Simulink by using UPFC and without using UPFC.
In this paper the performance of Synchronous Generator which is act as a Dispersed Generator is examined in controlling the flow of power over the transmission line. This project presents real and reactive power flow control through a... more
In this paper the performance of Synchronous Generator which is act as a Dispersed Generator is examined in controlling the flow of power over the transmission line. This project presents real and reactive power flow control through a transmission line by placing Synchronous Generator at the load end along with UPFC at the midpoint of a power system. The real and reactive powers can be easily controlled in a power system using a Synchronous Generator and UPFC in the system. The Matlab simulation results are presented to verify the model. The result of network with and without using Synchronous Generator and UPFC are compared in terms of active and reactive power flows in the line and active and reactive power flows at the load end to analyze the performance of generator. After using UPFC the power transfer capacity has increased. Hence consumer will be benefited. The studies are performed based on well known software package MATLAB/Simpower tool box.
devices uses power electronics components to maintain controllability and capability of electrical power system FACTS controller includes unified power flow controller (UPFC), Static synchronous compensators(STATCOMs), Thyristor... more
devices uses power electronics components to maintain controllability and capability of electrical power system FACTS controller includes unified power flow controller (UPFC), Static synchronous compensators(STATCOMs), Thyristor controlled series compensators (TCCs), Static series synchronous compensators (SSSCs) and Static VAR compensators (SVCs), are able to modify voltage, phase angle and impedance at particular bus in a power system. The (UPFC) is the most versatile and complex power electronic equipment that has emerged for the control and optimization of power flow in electrical power transmission system. In this paper we see how the UPFC increases the transmission capacity and reduce the power congestion in the transmission line. This paper shows the results that we obtained by implementing a Transmission system in MATLAB Simulink by using UPFC and without using UPFC.
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of... more
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the proposed controllers (NEWELM and NIMC) are based neural adaptive control and simulated on a two-bus test system and compared with a conventional PI controller with decoupling (PI-D). The studies are performed based on well known software package MATLAB/Simulink tool box. Flexible Alternating Current Transmission System devices (FACTS) are power electronic components. Their fast response offers potential benefits for power system stability enhancement and allows utilities to operate their transmission systems even closer to their physical limitations, more efficiently, with improved reliability, greater stability and security than traditional mechanical switching technology. The most used component of FACTS systems is the Unified Power Flow Controller (UPFC). According to high importance of power flow control in transmission lines, new controllers are designed based on the Elman Recurrent Neural Network (NEWELM) and Neural Inverse Model Control (NIMC) with adaptive control.
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the... more
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the proposed controllers (NEWELM and NIMC) are based neural adaptive control and simulated on a two-bus test system and compared with a conventional PI controller with decoupling (PI-D). The studies are performed based on well known software package MATLAB/Simulink tool box. Flexible Alternating Current Transmission System devices (FACTS) are power electronic components. Their fast response offers potential benefits for power system stability enhancement and allows utilities to operate their transmission systems even closer to their physical limitations, more efficiently, with improved reliability, greater stability and security than traditional mechanical switching technology. The most used component of FACTS systems is the Unified Power Flow Controller (UP...
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the... more
The main purpose of this paper is to design a regulator which enables a power system to track reference signals precisely and to be robust in the presence of uncertainty of system parameters and disturbances. The performances of the proposed controllers (NEWELM and NIMC) are based neural adaptive control and simulated on a two-bus test system and compared with a conventional PI controller with decoupling (PI-D). The studies are performed based on well known software package MATLAB/Simulink tool box. Flexible Alternating Current Transmission System devices (FACTS) are power electronic components. Their fast response offers potential benefits for power system stability enhancement and allows utilities to operate their transmission systems even closer to their physical limitations, more efficiently, with improved reliability, greater stability and security than traditional mechanical switching technology. The most used component of FACTS systems is the Unified Power Flow Controller (UP...
