We successfully study the simulation model of upfc and its output. Dynamic modeling and control of upfc for power flow control. The upfc controllable region is obtained by keeping the injected voltage to its maximum value 0. The schematic figure of unified power flow controller is given below.
That is the main idea behind solving this system using the model in figure 1. Pdf design, simulation and implementation of a upfc unified. Facts, pid, pod, power system, controller, upfc model i introduction. This paper presents the comprehensive model of upfc controllers in simulink block set to investigate the effect of series impedance of the transformer and. Reactive power compensation in single phase distribution. If you modify this model, or change parameter values of power components, the initial conditions stored in the xinitial variable will no longer be valid and simulink. Modeling and semiconductor level simulation of matrix. In this paper, the simulation results of switching level modeling of upfc using igbt developed in matlabsimulink have been presented. The steadystate and transient performance of a 12pulse, mw 500 kv2ka 5060 hz hvdc transmission system. Modelling and controlling of unified power flow controller upfc. We study the simulation model of upfc and its output. Modeling and simulation of voltage source model of upfc in. Modeling of unified power flow controller upfc for the. Power quality improvement using upfc research trend.
Unified power flow controller upfc is an advanced and versatile device of flexible. International journal of electrical and power engineering, 2. The upfc consists of two 100 mva, igbtbased, converters one shunt converter and one series converter interconnected through a dc bus. In 5 an advanced control scheme for the upfc is proposed, with focus on dynamic as well on static performance. Pdf single phase unified power flow controller upfc. The shunt converter or statcom is designed first and then followed by. Upfc based on adaptive neurofuzzy for power flow control. The simulation results reveal that upfc device has an excellent capability to enhance real and reactive power.
Pdf enhancement of system performance using upfc roopa. Stability improvement of power system by using psc controlled. The upfc located at the left end of the 75km line l2, between the 500 kv buses b1 and b2, is used to control the active and reactive powers flowing through bus b2 while controlling voltage at bus b1. The upfc has been modeled and simulated for closed loop and open loop systems using matlab simulink. Experimental verification and matlab simulation of upfc. In this research paper a simulink model is considered with upfc model to evaluate the performance of a single and double transmission line systems 226. Modeling and simulation of voltage source model of upfc in an. Simulation of real and reactive power flow assessment with. The simulation results of the power flow indicate that upfc has strong control capability of power flow and voltage. It consists of a phasor model of two 100mva, igbtbased, converters one connected in shunt and one connected in series and both interconnected through a dc bus on the. Simulation is done using matlab simulink software and results are shown with and without hybrid controller. It consists of a phasor model of two 100mva, igbtbased, converters one connected in shunt and one connected in series and both interconnected through a dc bus on the dc side and to the ac. The model of the upfc, connected to a power network through a transmission line, is shown and used to design suitable controllers. The simulation model is tested for single and double transmission line systems with and without upfc model in matlabsimulink environment.
It is also shown that a upfc can control independently. Analysis of statcom, svc and upfc facts devices for. Mahendra pratap singh gurjar, girish dalal subject. Upfc in power transmission lines a unified power flow controller upfc consists of 2 forcedcommutated voltage source converters. Transient stability analysis of power system with upfc. Modeling and simulation of upfc using pscademtdc article pdf available in international journal of physical sciences 745. Simulation is done using matlabsimulink software and results are shown with and without hybrid controller. The main objective of this paper is to study the performance of upfc under different uncertain parameters and to design a pi.
The windturbine model is a phasor model that allows transient stability type studies with long simulation times. Unified power flow controller the upfc, which was first proposed by 10, 11, 12 consists of shunt exciting and series boosting transformers as shown in figure 1. Upfc steadystate, dynamic and linearized models, algorithm for interfacing the upfc with the power network and upfc basic and damping controller design. This sag is compensated by using facts devices like tcsc and upfc. In this example, the system is observed during 50 s. Upfc simulation and control using the atpemtp and matlabsimulink programs. The designed system tested using matlab simulink software and result was compared. Design and analysis of unified power flow controller in matlab. Stability improvement of power system by using psc. The unified power flow controller upfc is the most versatile member of the flexible ac transmission systems facts family using power electronics to control power flow on power grids 1. Modeling, controller design and semiconductor level.
Modeling of unified power flow controller upfc for the control of real and reactive. The three phase fault is occurring just after 1 second and fault clearing time is. Unified power flow controller can control the power system parameters like voltage, line reactance. The upfc uses a combination of a shunt controller statcom and a series controller sssc interconnected through a common dc bus as shown on the figure below.
Study on modeling and simulation of upfc springerlink. This device offers an alternative mean to mitigate transmission system oscillations. This example shows an unified power flow controller upfc used to relieve power congestion on a 500230 kv grid. The main objective of this paper is to study the performance of upfc under different uncertain parameters and. Upfc basic configuration arrangement the upfc consists of two switching converters. This paper also presents the study of upfc using matlab 7. The main interest in this study is to design and develop a simulation model of a three phase upfc using simpowersystem blockest of matlabsimulink software. By using a upfc the oscillation introduced by the faults, the rotor angle and speed deviations can be damped out quickly than a system without a upfc. We also study about the buckboost converter simulink model and its output. Hardware implementation is done and adapt it to power system model in the university. The simulation model is tested for single and double transmission line systems with and without upfc model in matlab simulink environment. The scope is used to plot the output of the integrator block, xt.
The model of upfc parallel part in this paper uses a pid controller and its control system adopts a dq decoupled strategy. Open model this example shows an unified power flow controller upfc used to relieve power congestion on a 500230 kv grid. Simulink model of 22kvtransmission line the simulation model of single line transmission system of 22kv line is shown in fig. Upfc, in the matlab simulink environment is presented. Aug 29, 2019 the imlementations model various kinds of manipulators and mobile robots for position control, trajectory planning and path planning problems. Then, using the sum component, these terms are added, or subtracted, and fed into the integrator. A unified power flow controller upfc is used to control the power flow in a 500 kv transmission system.
Controlling is done with the help of igbt based converters through dsp kitfor controlling firing angle of converters. The resulting figure is not suitable for direct inclusion into e. The main interest in this study is to design and develop a simulation model of a three phase upfc using simpowersystem blockest of matlab simulink software. In this paper, the simulation results of switching level modeling of upfc using igbt developed in matlab simulink have been presented. Any point located inside the pq elliptic region can be obtained in upfc mode. Practical outputs is compared with simulation result and doing necessary changes to get better outcome from it. Pdf modeling and simulation of upfc using pscademtdc. The shunt converter or statcom is designed first and then followed by the designing of the series converter or sssc. If the strategy for upfc, modeling of upfc using matlab power balance is not maintained, the capacitor cannot simulink and to analyze the control strategy. In the developed model synchronous generator is represented by model 1. Modelling and controlling of unified power flow controller. Moreover, matlabsimulink models for subsystems of the. A modelfree approach for the selection of the controller may also be an acceptable solution.
It can also independently provide controllable shunt reactive compensation. The statcom and sssc are configured together with the control unit in figure 6 to form the upfc model in figure 8, while two sssc models are combine with the control unit to form the ipfc in figure 10. To see the resulting pq trajectory, double click the show upfc controllable region. Also, in order to observe the dynamic response of the control system, the gui allows you. Transient stability analysis with sssc and upfc in multi. Modeling of unified power flow controller upfc semantic scholar. Study system model in matlab simulink with upfc rs s s p,q, s. The upfc located at the left end of the 75km line l2, between the 500 kv buses b1 and b2, is used to control the active and reactive powers flowing through bus b2. The focus of this thesis is a facts device known as the unified power flow controller upfc. Abstract matlabsimulink model of a singlephase grid with a static var compensator svc, static synchronous compensator statcom and unified power flow controller upfc for compensation of reactive power and for maintaining the power factor in the grid close to unity is presented. The above diagram shows a simplified model of an uncompensated system. The equations for sending end active and reactive power can be obtained from the real and imaginary powers of power equation as follows.
Figure 7 is the simulink model of the 30bus system under consideration without any. The series converter can inject a maximum of 10% of nominal linetoground voltage 28. Pdf upfc simulation and control using the atpemtp and. Experimental verification and matlab simulation of upfc for. Upfc are also developed to create a simulation model of. Given a simulink block diagram model, i would like to produce a screenshot to be used later in a latex document. When you open this example, the initfcn callback in the model propertiescallbacks automatically loads into your workspace the contents of this. Facts devices used in transmission and distribution. Time domain simulation method is implemented in this paper. This example shows a detailed model of a 48pulse, gtobased unified power flow controller 500 kv, 100 mva. In this paper, a upfc model has been designed and implemented using matlabsimulink.
The modeling and control strategy of unified power flow controller upfc, wind energy conversion system wecs and photovoltaic array pv is designed using matlab simulink software. The voltage sag is created by adding an extra load at the receiving end. Upfc based on adaptive neurofuzzy for power flow control of. This paper presents the modeling and simulation of 14bus system using tcsc and upfc. With matlab, this paper realizes the power flow analysis and power system voltage stability computation. Simulation study of the unified power flow controller upfc. It is an important question is the selection of the input signals and the adopted control strategy for. Design and simulation of the upfc simulink model with hysteresis and. Figure 7 is the simulink model of the 30bus system under consideration without any compensating device. Simulation of location of tcsc and upfc in fourteen bus. Upfc, in the matlabsimulink environment is presented. Tool for modeling simulink provides a graphical editor for building models as block diagrams, allowing.
A 3bus system has been employed in matlabsimulink program to study the test system in detail. Transient stability analysis of power system with upfc using psat. Thyristor controlled series compensator tcsc and unified power flow controller upfc are included in 14bus system to improve the power quality of the power system. Upfc with and without pss, ieee three machines, nine bus multimachine power system has been considered. Simulink model of three phase induction motor file.
Simulation study of the unified power flow controller upfc author. Simulation and analysis of unified power flow controller using. In other words, the upfc can provide simultaneous control of all the. In the simulation study, the upfc models ease the real time control and dynamic compensation of ac transmission system. Simulation of a threephase multilevel unified power flow. In the simulation study, mat lab simulink environment is used to simulate the model of upfc connected to a 3 phase system. The analysis is done on the system with different power factors and load conditions. A upfc is used to control the power flow in a 500 kv 230 kv transmission system. The system, connected in a loop configuration, consists essentially of five buses b1 to b5 interconnected through transmission lines l1, l2, l3 and two 500 kv23 kv transformer banks tr1 and tr2. Recently, an upfc simulation block has become available at the mathwoks site. The modeling and control strategy of unified power flow controller upfc, wind energy conversion system wecs and photovoltaic array pv is designed using matlabsimulink software. Since then, the upfc, as well as the techniques to control it, have been subject to intensive research e. The upfc has been modeled and simulated for closed loop.
Used to improve the transient stability of the power system 8. Upfc are also dev eloped to create a simulation model of. Simulink also provides examples that model a wide variety of realworld phenomena. Pdf modelling of upfc unified power flow control to improve. Save matlab simulink model as pdf with tight bounding box. The model is supplied from an 11 kv voltage source. The model is simulated and corresponding results of voltage magnitude, real and reactive power flows in the line are shown in figs. The fault is preparedto occur near generator for 200ms. Simulation of real and reactive power flow assessment with upfc. A fault was considered in between 57 and their effect was studied with and without upfc.
Experimental controlled reading of upfc is obtained with the help of lab model for various parameters. Enhancement of transient stability with unified power flow. The matlabsimulink software is used to create upfc model and to obtain the results of case studies. The gui allows you to choose the operation mode upfc, statcom or sssc as well as the prefqref reference powers andor vref reference voltage settings. Without using the upfc the rotor angle are increasing and go out of synchronism but with the upfc they remain in voltage profile the graph shows the voltages at various buses with and. Open the wind turbine block menu and look at the four sets of parameters specified for the turbine, the. The upfc can control both the active and reactive power flow in the line.
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