Design,Simulation and Implementation of an UPFC

1. Design, Simulation and Implementation Of A UPFC
(Unified Power Flow Controller)
For Power System Model
Proposal Presentation
11/07/2016
120499E – T.P.G.A. Priyankara
120050V – N.M.K.D Bandara
120151G – M.J.L.R. Fernando
120583G – I.A.K.Sandeepa
Group Members:Supervisor : Dr. K.T.M.U. Hemapala
Presented By :
120499E – T.P.G.A. Priyankara
120583G – I.A.K.Sandeepa
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2. • Introduction
• Why an UPFC?
• Why is It for the Power system model?
• Scope & Objectives
• Literature Review
• Methodology
• Timeline
• References
Outline
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3. Introduction
 The UPFC is one of the modern FACTS (Flexible Alternating Current
Transmission Systems) device that can be used for the control of active
and reactive power in a transmission line.
 FACTS is defined by the IEEE as "a power electronic based system and
other static equipment that provide control of one or more AC
transmission system and increase the capacity of power transfer.”
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4. FACTS Devices
Voltage Source
Converter (VSC)
Thyristor valve
Static Var Compensator
SVC
Static Synchronous
Series Compensator
SSSC
Static Synchronous
Compensator
STATCOM
Thyristor Controlled
Series Compensator
TCSC
Dynamic Flow
Controller
DFC
Unified Power Flow
Controller
UPFC
Shunt Devices
Series Devices
Shunt and
Series Devices
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5.  Unified Power Flow Controller (UPFC) is the most versatile device designed
based on the concept of combined series-shunt FACTS Controller.
 It has the ability to simultaneously control all the transmission parameters
affecting the power flow of a transmission line i.e. voltage, line impedance
and phase angle.
 By controlling impedance, voltage magnitude, phase angle, UPFC is used to
control the power flow in the transmission systems.
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6.  The UPFC consists of two voltage source converters; series and shunt
converter, which are connected to each other with a common dc link.
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7. Why an UPFC?
There are frequent disturbances in a power system due to its dynamic nature
and it can lead the system to an unsteady condition.
 We can increase transmission system reliability and availability by
using UPFC, also it increase dynamic and transient grid stability of
the system.
With the increasing demand, the existing transmission network should be
used optimally rather than constructing new transmission lines.
 UPFC provide better utilization of existing transmission system
assets and environmental benefits.
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8. Why is it for Power System Model?
 It is a further improvement for existing power system model in the
university.
 We have no facilitate to implement a hardware for actual transmission
system in Sri Lanka.
 Concept behind this can further develop to come up with a better
product to Sri Lanka power sector.
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9. 9
Scope & Objectives
 Design and simulation of an UPFC for the Power System Model by using
MATLAB/Simulink.
 Hardware implementation is done and adapt it to power system model in the
university.
 Practical outputs is compared with simulation result and doing necessary
changes to get better outcome from it.
 End up with controllable UPFC for power system model to improve power
quality.

10. 10
Literature Review
 Das, Abhishek, and A. K. Sharma. "Experimental Study of Power Quality in Transmission Line by
using of FACTS Device." International Journal for Innovative Research in Science and Technology 2.6
(2015): 32-36.
 This paper presents the applications of Flexible AC Transmission Systems (FACTS)
controllers and how the performance parameters of power systems are achieve by different
FACTS controllers.
 Bindeshwar Singh, Pavan Prakash Gupta, Rajiv Kumar and Ashok Kumar, “Electrical Power Quality
Problem: A key Issues, Challenges & Opportunities”, Journal of Automation & Systems Engineering”,
Volume 9, Issue 4, December 2015
 This paper present power quality problems (voltage fluctuation, frequency, harmonics) and
power quality problems can be solved by using FACTS controllers.

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 Khanchi, Sapna, and Vijay Kumar Garg. "Unified Power Flow Controller (FACTS Device):
A Review." system 5 (2013): 6.
 This paper discusses about operating (control) modes of shunt and series voltage
converters of the UPFC. There are two operating modes for the shunt voltage converter
.
• VAR control mode
• Automatic voltage control mode
 The different control modes for the series voltage converter are given :
• Direct voltage injection mode
• Phase Angle Shifter Emulation mode
• Line impedance emulation mode
• Automatic power flow control mode

12. 12
 Qader, M. R. "Design and simulation of a different innovation controller-based UPFC (unified power
flow controller) for the enhancement of power quality." Energy 89 (2015): 576-592.
 The Shunt and series voltage inverters are connected through a DC link capacitor to coordinate . This will
allow bidirectional flow of real power in the middle of output terminals of shunt and series inverters. The
energy storing capacity of the DC capacitor is generally low. Therefore the real power demand of the series
inverter has to be supplied by the shunt inverter.
 Different PI controllers are used to control the operation of the UPFC including decoupling PI controllers,
hybrid PI controllers, and cross-coupling PI controllers. The real and reactive power flows decrease when
cross-coupling PI controllers are used and the direct coupling PI regulation methods can lessen the harmonics
in the measurement. For the purpose of damping oscillations in power systems, a mixture of cross-coupling PI
controller and direct coupling controllers, known as hybrid controllers, were recommended.

13. 13
 K.Suresh1 P.Venkatesh, Modelling and Controlling Of Unified Power Flow Controller (UPFC),
International Journal of Modern Engineering Research (IJMER), Vol.2, Issue.4, July-Aug 2012 pp-
2574-2577
 In this paper a comparison done between conventional PI controller and the proposed ANFIS based
controller for UPFC indicates that the proposed ANFIS based controller has less settling time and
less overshoot when compared with the conventional PI controller.

14. 14
Methodology
• Analyze the problem
 Do a detailed background study about UPFC
 Study about Power System Simulation Model in the
university
• Finalize set of technical details
• Design a system model and simulate it using MATLAB/Simulink
• Analyze the simulation results
• Select and buy required components
• Hardware implementation
• Analyze the experimental results

15. Timeline
Activity
Timelines
1(June 2016) to 10 (March 2017)
1 2 3 4 5 6 7 8 9 10
1. Detailed background study
2. Design a system model
3. Simulation and Analysis
4. Hardware Implementation
5. Results and Analysis
6. Report Writing
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16. References
 Das, Abhishek, and A. K. Sharma. "Experimental Study of Power Quality in Transmission Line by using of
FACTS Device." International Journal for Innovative Research in Science and Technology 2.6 (2015): 32-36.
 Bindeshwar Singh, Pavan Prakash Gupta, Rajiv Kumar and Ashok Kumar, “Electrical Power Quality Problem:
A key Issues, Challenges & Opportunities”, Journal of Automation & Systems Engineering”, Volume 9, Issue
4, December 2015
 Khanchi, Sapna, and Vijay Kumar Garg. "Unified Power Flow Controller (FACTS Device): A Review."
system 5 (2013): 6.
 Qader, M. R. "Design and simulation of a different innovation controller-based UPFC (unified power flow
controller) for the enhancement of power quality." Energy 89 (2015): 576-592.
 K.Suresh1 P.Venkatesh, Modelling and Controlling Of Unified Power Flow Controller (UPFC), International
Journal of Modern Engineering Research (IJMER), Vol.2, Issue.4, July-Aug 2012 pp-2574-2577
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Thank You !!!!