batch1major projectppt 17level inverter.pptx

This presentation gives the information about seventeen level inverter cascading flying and floating capacitor. In this presentation a brief description is given how the 17 levels of energy is produced from a dc source . From the third level to 17 level has been designed . The circuits for 3,5,7,9,11,13,15,17 levels inverters circuits has been designed and verified the output using matlab simulation

1. kakatiya institute of technology and science for women DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING UNDER THE GUIDANCE OF B.MAHENDAR M.Tech

2. PRESENTED BY: B.R.PRATHIKSHA (196B1A0201) M.SUPRITHIKA (196B1A0209) CH.AISHWARYA (196B1A0202) G.ANIHARIKA (196B1A0203) A Project Stage –II On A SEVENTEEN-LEVEL INVERTER FORMED BY CASCADING FLYING CAPACITOR AND FLOATING CAPACITOR H-BRIDGES

3. CONTENTS INTRODUCTION S CHEMATIC DIAGRAM SWITCHING OPERATION Simulation model ADVANTAGES DISADVANTAGES APPLICATIONS CONCLUSION FUTURE SCOPE REFERENCES E

4. INTRODUCTION In this paper, we propose a new 17-level inverter built by cascading three-level flying capacitor inverters with floating capacitor H-bridges that employs a single dc source and extracts all required voltage levels from it. The performance of medium and high-voltage drives has altered dramatically since the introduction of multilayer inverters. As the number of voltage levels grows, the output voltage approaches a sine wave with less harmonic content, considerably boosting the drive's performance

5. Multilevel inverters are high-power sources that are extensively used in industrial applications. M ulti-level inverters employ a series of solid-state power converters (typically two to three) to generate greater voltages. Inverters transfer energy with a single switch push, whereas multi-level inverters require numerous switches to toggle, each with its own Multilevel Inverter

6. H-Bridge circuit

7. Three-phase power schematic of the proposed seventeen-level inverter

8. Single phase of the proposed 17-level inverter configuration

9. Switching Redundancies for pole voltage of Vdc/16 (a) Current path for switching state (0, 0, 0, 0, 0, 0, 0, 1). (b) Current path for switching state (0, 0, 0, 0, 0, 1, 1, 0). (c) Current path for switching state (0, 0, 0, 1, 1, 0, 1, 0). (d) Current path for switching state (0, 1, 1, 0, 1, 0, 1, 0). (e) Current path for switching state (1, 0, 1, 0, 1, 0, 1, 0).

10. Simulation model

11. Sub-System

12. Control diagram

13. Output voltage

14. Output current

15. Capacitor voltages

16. ADVANTAGES: 1. It performs reliably in sudden load change or food power factor change with no spike or latching of any kind. 2. Moreover, the capacitors are self-balancing, thus reduced the complexity of balancing the total harmonic distortion THD offered is 4.79% in output voltage 3. The proposed topology is superior in device count, power quality. Total Standing Voltage (TSV) and cost factor 4. The topology is highly efficient and is much suitable for renewable energy applications  

17. DISADVANTAGES: The proposed structure is the utilization of be directional switches which adds to the device count and increases the TSV p

18. APPLICATIONS: 1. The proposed MLI is well suited for the medium power applications such as FACTS, SVC, DSTATCOM and DVR. 2. Renewable energy applications like Grid-tied solar PV systems, wind & fuel cells. 3. Used as UPS. 4. High voltage DC & AC transmission. 5. Variable Frequency Drives, in pumps, conveyors etc.

19. FUTURE SCOPE 1. The general concept of multilevel power conversion was introduced more than twenty years ago. However, most of the development in this area has occurred over the past five years. Besides the mainstream power electronics conferences and journals, multilevel power conversion is also showing up in power systems and electronics societies. 2. Despite the rapid growth of this area in recent years and the increasing number of innovations introduced each year, there is still much more that can be done.

20. CONCLUSION The proposed configuration uses a single dc link and derives the other voltage levels from it. This enables back-to-back converter operation where power can be drawn and supplied to the grid at prescribed power factor. Also, the proposed 17-level inverter has improved reliability. In case of failure of one of the H-bridges, the inverter can still be operated with reduced number of levels supplying full power to the load

21. [1] J. Rodriguez, Jih-Sheng Lai, Fang Zheng Peng,”Multilevel inverters: a survey of topologies, controls, and applications,” IEEE Trans. Ind. Appl.,Vol.49,no.4,pp.724,738,Aug2002. [2] L. G. Franquelo , J. Rodriguez, J. I. Leon, S. Kouro , R. Portillo, M.A.M. Prats, “The age of multilevel converters arrives,” IEEE Ind. Electron. Magazine, vol. 2, no. 2, pp. 28–39, June.2008. [3] S. Kouro , M. Malinowski, K. Gopakumar , J. Pou , L. G. Franquelo , B.Wu , J. Rodriguez, M. A. Perez, and J. I. Leon, “Recent Advances and Industrial Applications of Multilevel Converters,” IEEE Trans. Ind. Electron.,vol . 57, no. 8, pp. 2553–2580, Aug. 2010. [4] A.M. Massoud , S. Ahmed, P.N. Enjeti and B.W. Williams, "Evaluation of a Multilevel Cascaded-Type Dynamic Voltage Restorer Employing Discontinuous Space Vector Modulation," IEEE Trans. Ind. Electron. , vol.57, no.7, pp.2398-2410, July 2010. [5] S. Rivera, S. Kouro , B. Wu, S. Alepuz , M. Malinowski, P. Cortes, J.R. Rodriguez, "Multilevel Direct Power Control - A Generalized Approach for Grid-Tied Multilevel Converter Applications," IEEE Trans. on Pow. Electron., vol.PP , no.99, pp.1,1 References

22. Thank You