Presentation of Dissertation Phase–I on

1. Presentation ofDissertation Phase–Ion Power Quality Improvement Using STATCOM Prepared By: Mr. Rakesh A. Panchal P. G. Student Enroll. No – 130030745005 Atmiya Inst. of Tech. & Sci., Rajkot Guided By: Prof. NirajB.Danidhariya Assistant Professor, Dept. of Ele.Engineering, Atmiya Inst. of Tech. & Sci., Rajkot SUBMITTED TO: GUJARAT TECHNOLOGICAL UNIVERSITY

2. Flow of Presentation • Introduction • Problem Definition • Types of Methods • Block Diagram • Working Principle • Advantages • Application • Proposed Solution • Future Scope • References

3. Introduction • Power Generation and Transmission is a complex process. • It is required to maintain the voltage to deliver the active power through the lines. • Loads like motor loads and other loads require reactive power for their operation. • To improve the performance of ac power systems, we need to manage reactive power in an efficient way. • Essential to balance demand of Active and Reactive power.

4. History of Different Techniques A. First Generation; Mechanically switched devices are: • Fixed shunt reactor (FR) • Fixed shunt capacitor (FC) • Mechanical switched shunt reactor (MSR) • Mechanical switched shunt capacitor (MSC) B. Second Generation; Thyristor-based devices are: • Thyristor controlled Reactor (TCR) • Thyristor switched capacitor (TSC) • Static Var compensator (SVC) • Thyristor switched series compensator (Capacitor or reactors) (TSSC/TSSR) • Thyristor controlled series compensator capacitors or reactors (TCSC/TCSR). • Thyristor controlled braking resistors (TCBR) • Thyristor controlled phase shifting transformers (TCPST) • Line commutated converter compensator (LCC)

5. History of Different Techniques C. Third Generation; Converter-based devices • Static synchronous compensator (STATCOM) • Static Synchronous Series compensator (SSSC) • Unified power flow controller (UPFC) • Interline power flow controller (IPFC) • Self commutated compensator (SCC)

6. Literature Review [1] Sercan Teleke , Atousa Yazdani , Bhavya Gudimetla , Johan Enslin Juan Castaneda, “Application of STATCOM for Power Quality Improvement”, • The application of a STATCOM can help to alleviate some of the power quality issues encountered within a refinery consisting of large induction machine loads. [2] Rupal singh, Dushyant Kumar “Simulation of D-STATCOM for Voltage Fluctuation” • The power quality problems such as voltage dips, swells and interruptions, consequences, and mitigation techniques of custom power electronic devices D-STATCOM [3] Hendri Masdi, Norman Mariun, Senan Mahmud, Azah Mohamed and SaIlehhudin Yusuf, “Design of a Prototype D-Statcom for Voltage Sag Mitigation” • In this paper control strategy is for ac side voltage and reactive power. PI controller is used to control the flow of reactive power to and From the DC capacitor

7. Literature Review [4] Zhengping Xi, Subhashish Bhattacharya, “STATCOM Control with Instantaneous Phase locked Loop For Performance Improvement Under Single-line to Ground Fault” • This paper describes an “Instantaneous PLL” strategy to prevent over-currents and trips in the VSC based STATCOM during and after SLG system faults. [5] Y suresh, A.K.Panda, “Dynamic Performance Of Statcom Under Line To Ground Faults In Power System.” • This paper describes dynamic performance of STATCOM when it is subjected to line to ground faults. The STATCOM based on voltage source converter (VSC) is used for voltage regulation in transmission and distribution systems. It can supply dynamic VAR's during system faults for voltage support.

8. Problem Definition Power Quality Parameters needs Improvement Like: • Voltage sag • Reactive power • Power factor • Power System Stability • Transmission and Distribution Losses

9. Types of Methods Flexible AC transmission system or FACTS devices used are: 1) VAR generators. a) Fixed or mechanically switched capacitors. b) Synchronous condensers. c) Thyristorized VAR compensators. (i) Thyristors switched capacitors (TSCs). (ii) Thyristor controlled reactor (TCRs). (iii) Combined TSC and TCR. (iv) Thyristor controlled series capacitor (TCSC).

10. Types of Methods 2) Self Commutated VAR compensators. a) Static synchronous compensators (STATCOMs). b) Static synchronous series compensators (SSSCs). c) Unified power flow controllers (UPFCs). d) Dynamic voltage restorers (DVRs)

11. The STATCOM (Static synchronous compensators) • It absorbs or generates Reactive Power. • Used For mitigation of Transmission related problems. • STATCOM is defined by IEEE as a self commutated switching power converter supplied from an appropriate electric energy source and operated to produce a set of adjustable multiphase voltage, which may be coupled to an AC power system for the purpose of exchanging independently controllable real and reactive power. • STATCOM used in Distribution network is known as DISTRIBUTION STATCOM(D-STATCOM).

12. Basic Block Diagram [1]

13. Operating Principle[1] • No Load Operation If, Vc=Vs, Ics=0

14. 2) Capacitive Operation Mode If Vc > Vs, Ics is leading current since magnitude of the current can be controlled by controlling voltage Vc, STATCOM will work as a capacitor whose capacitive reactance is continuously controllable.

15. 3) Inductive Operation Mode Vc < Vs, Ics is lagging current The STATCOM will function as a reactor whose Inductive reactance is continuously controllable.

16. Basic Block Diagram for Simulation [2]

18. Advantages • Compact Size • Smooth control over wide range of Operating Condition. • Dynamic response following system contingences. • High Reliability with redundant converter design and modular construction. • Flexibility of reconfiguration to BTB(back to back) power transmission or UPFC(Unified power flow controller) and other configuration.

19. Reactive Power Compensation S T A T C O M Voltage Regulation Transient Stability Improvement General Performance or Application Steady State Stability Improvement Power Oscillation Damping Increase in Power Transfer Capacity Line Loss Minimization Three-phase Voltage Balancing Flicker Suppression

20. Proposed Solution • By Installing STATCOM in Power system network, Various Power Quality parameters can be Improved.

21. Simulation & Results

22. 3-ø Fault on Line

23. 3-ø Fault on Line Waveform

24. 3-ø Fault on Line with STATCOM

25. 3-ø Fault on Line with Statcom Waveform

26. Voltage sag/swell

27. Voltage Sag waveform

28. Voltage Swell waveform

29. Future Scope • Simulation of STATCOM for Voltage Sag and Swell. • Simulation of STATCOM for Harmonics reduction with Induction motor as Load. • All the Simulation with different control strategy.

30. References [1] TMT&D Corporation, Tokyo, Japan.“STATCOM” http://www.meppi.com/Products/FACTS/Documents/FACTS%20Technologies%20and%20STATCOM.pdf [2] Sercan Teleke Atousa Yazdani Bhavya Gudimetla Johan Enslin Juan Castaneda, “Application of STATCOM for Power Quality Improvement”, IEEE Transactions on Power Delivery, Pp. 978-983, July-2011. [3] Tariq Masood, R.K. Aggarwal, S.A. Qureshi, R.A.J Khan, “STATCOM Model against SVC Control Model Performance Analyses Technique by Matlab”, International Conference on Renewable Energies and Power Quality ,ICREPQ’10 –March- 2010. [4] “ELECTRIC POWER / CONTROLS STATIC SYNCHRONOUS COMPENSATOR (STATCOM) Courseware Sample by the staff of Lab-Volt Ltd”, August-2012 https://www.labvolt.com/downloads/86371_F0.pdf

31. Thank You