iosr-JEEE   Volume-2 ~ Issue-5

Abstract: The growing demand and the aging of networks make it desirable to control the power flow in power-transmission systems fast and reliably. The Load changes the voltage Variation in transmission lines must be limited, other wise the consumer's equipments are damaged at distributed side. For reducing these types of problems to develop this controller. The DPFC (Distributed Power-Flow Controller) is derived from the unified power-flow controller (UPFC). The DPFC (Distribute Power-Flow Controller) modified from UPFC for increasing system reliability and reducing costs. The DPFC independently controlling the active and reactive power flow in transmission line. This paper consists of both active and reactive variations, using MATLAB/SIMULINK is simulated and its effects on the transmission lines observed. The simulated results are analyzed and validated with the real time results for the system considered.
Keywords - AC–DC power conversion, filters, load flow control, power electronics, power-transmission control, power semiconductor devices, Power system control V-I measurements.

[1] N. G. Hingorani and L. Gyugyi, Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems. New
York: IEEE Press, 2000.
[2] K.K.Sen.,"Sssc-static synchronous series compensator: Theory, modeling, and application," IEEE Trans. Power Del., vol. 13, no. 1,
pp. 241–246, Jan. 1998.
[3] N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics : Converters, Applications, and Design, 3rd ed. Hoboken, NJ:
Wiley, 2003.
[4] M. Mohaddes, A. M. Gole, and S. Elez, "Steady state frequency response of statcom," IEEE Trans. Power Del., vol. 16, no. 1, pp.
18–23, Jan. 2001.
[5] Static Synchronous Series Compensator: A Solid-state Approach to the Series Compensation of Transmission Lines, L. Gyugyi, C.
D. Schauder and K. K. Sen, 96 WM 120-6 PWRD, IEEE PES Winter Meeting, 1996.
[6] L. Gyugyi, C. D. Schauder, S. L. Williams, T. R. Rietman, D. R. Torgerson, and A. Edris, "Unified power flow controller: A new
approach to power transmission control," IEEE Trans. Power Delivery, vol. 10, no.2, pp. 1085–1093, Apr. 1995.
[7] Y.-H. Song and Y.-H. Song and A. Johns, Flexible ac Transmission Systems (FACTS) (IEE Power and Energy Series), vol. 30.
London, U.K.: Institution of Electrical Engineers, 1999. A. Johns, Flexible ac Transmission Systems (FACTS) (IEEE Power and
Energy Series), vol. 30. London, U.K.: Institution of Electrical Engineers, 1999.

Abstract: This paper presents a mathematical and programming model of conventional space vector pulse width modulation(CSVPWM) and mathematical analysis of new approach for designing SVPWM imaginary switching times called active zero space vector pulse width modulation AZSVPWM for reducing the common mode voltage.Vcm from +Vdc/2 to+Vdc/6.In AZSVPWM method the complexity involved in calculating Vref and angle information zero voltage vector are eliminated by simply taking two opposite active voltage vectors.
Keywords: AZSVPWM, CSVPWM, SVPWM, Vcm, VSI

[1]. F.Blaschke "The principle of field orientation as applied to new trans vector closed loop control system for rotating field
machines", Siemens Review,1972,PP 217-220.
[2]. Thomas G.Habetler and Leon M.Tolbert"Direct torque control of induction machines using space vector modulation".,IEEE
Trans.Ind.Appl., Vol.28,No.5,PP.1045-1053,SEPTEMBER/OCTOBER 1992
[3]. Heinz Willi Van Der Broeck,Hans-Christoph Skudelny,Member IEEE,and Georg Viktor Stanke" Analysis and Realization of a
pulse wuidth modular Based on voltage space Vectors "IEEE Trans.Ind.Appl.,Vol 24,no 1.jan/Feb,1998.
[4]. Isao Takahashi and Toshihiko Noguchi, "A New Quick Response and high efficiency control strategy of and induction
motor,"IEEE Trans .Ind.Applicat. Vol IA-22, no.5,sep/oct 1986,pp.820-827.

Abstract: This paper presents a mathematical and programming model of conventional space vector pulse width modulation(CSVPWM) and mathematical analysis of new approach for designing SVPWM imaginary switching times called active zero space vector pulse width modulation AZSVPWM for reducing the common mode voltage.Vcm from +Vdc/2 to+Vdc/6.In AZSVPWM method the complexity involved in calculating Vref and angle information zero voltage vector are eliminated by simply taking two opposite active voltage vectors.
Keywords: AZSVPWM, CSVPWM, SVPWM, Vcm, VSI

[1]. F.Blaschke "The principle of field orientation as applied to new trans vector closed loop control system for rotating field
machines", Siemens Review,1972,PP 217-220.
[2]. Thomas G.Habetler and Leon M.Tolbert"Direct torque control of induction machines using space vector modulation".,IEEE
Trans.Ind.Appl., Vol.28,No.5,PP.1045-1053,SEPTEMBER/OCTOBER 1992
[3]. Heinz Willi Van Der Broeck,Hans-Christoph Skudelny,Member IEEE,and Georg Viktor Stanke" Analysis and Realization of a
pulse wuidth modular Based on voltage space Vectors "IEEE Trans.Ind.Appl.,Vol 24,no 1.jan/Feb,1998.
[4]. Isao Takahashi and Toshihiko Noguchi, "A New Quick Response and high efficiency control strategy of and induction
motor,"IEEE Trans .Ind.Applicat. Vol IA-22, no.5,sep/oct 1986,pp.820-827.

Abstract :Power quality in distribution system has been the major issue now-a-days. Utility distribution networks, sensitive industrial loads and critical commercial operations suffer from various types of power quality problems like voltage sag, service interruptions total harmonic distortion (THD) etc. A voltage dip is a short time (10 ms to 1 minute) event during which a reduction in r.m.s voltage magnitude occurs.. Multi-level inverters are the best form to solve these problems. The general structure of multilevel inverter is to synthesize sinusoidal voltage waveform from several levels of voltages typically obtained from capacitor voltage source. In this paper both the Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width Modulation (SVPWM) techniques are employed for the 3-level multi inverter and both these techniques are compared along with the application of STATCOM. All the results are studied through MATLAB Simulink by designing a 10KV, 400V, 50Hz system by applying 3-Ф to ground fault using RL load.
Keywords:Multi-level inverter, SPWM technique, SVPWM technique, STATCOM, Total Harmonic Distortion (THD). I

[1] D. G. Holmes and T. A. Lipo. 2003. Pulse Width Modulation for Power Converters: Principles and Practice. M.E. El -Hawary, Ed.
New Jersey: IEEE Press, Wiley- Interscience. pp. 215-313.
[2] G. Bhuvaneshwari and Nagaraju "Multilevel inverters – a comparative study" vol .51 No.2 march – April 2005.
[3] B. Hariram and N. S. Marimuthu. 2005. Space vector switching patterns for different applications- A comparative analysis.
Proceedings of IEEE conference. pp. 1444-1449.
[4] A. M. Massoud, S.J. Finney and B.W. Williams "Control Techniques for Multilevel Voltage Source Inverters" IEEE proce. 2003.
[5] Siriroj Sirisukprasert, Jih- Sheng Lai & Tina – Hua Liu "Optimum harmonics Reduction With A wide Range Of Modulation
Indexes for Multilevel Converters" IEEE Trans Ind Application Electronics ,Vol 49 , No. 4, August 2002.
[6] T. Brükner, D. G. Holmes. "Optimal Pulse-Width Modulation for Three- Level Inverters". IEEE TRANS. Power Electron., Vol. 20,
N° 1, pp 82-89 January 2005.
[7] J. H. Seo, C. H. Choi, and D. S. Hyun, "A new simplified space-vector PWM method for three-level inverters," IEEE Trans. Power
Electron., vol. 16, no. 4, pp. 545–550, Jul. 2001.
[8] D. Soto and T. C. Green, "A comparison of high-power converter topologies for the implementation of FACTS controllers," IEEE
Trans. Ind. Electron., vol. 49, no. 5, pp. 1072–1080, Oct. 2002.
[9] J. Holtz. Pulse width Modulation for Electronic Power Conversion. Proc. Of the IEEE, Vol. 82, No.8, pp. 1194 –1213, Aug 1994.
[10] Leon M. Tolbert and Thomas G. Habetler, "Novel Multilevel Inverter Carrier-Based PWM Method", IEEE Transactions on industry applications, Vol. 35, No.5, sep/oct 1999. pages 1098 – 1107.

Abstract :In a electrical power system, whenever the voltage goes below the desired level,there is no need to improve the voltage profile. This increasing voltage can be obtained by using capacitor bank/s, as switching ON a capacitor bank/s causes increase in voltage while switching OFF a capacitor bank/s causes decrease in voltage. But these switching action, if not specifically controlled give rise to transients which are undesirable and hazardous for the power system. This introduces a voltage disturbance detection approach [1] identifies voltage disturbance, and[2] discriminate the type of event which has resulted in the voltage disturbance, e.g. either a fault or a capacitor switching incident. Feasibility of the proposed disturbance detection approach is demonstrated based on digital time domain simulation of a distribution power system using the PSCAD software package. Finally by using wavelet transform discriminate the type of event on the basic of energy levels. The demand for educational and awareness programs are recommended in order to contribute and increase the use of online transaction in the sultanate.
Key words: Capacitor switching,, distribution system, L-G,PSCAD wavelet transform, transient analysis.

[1] C. Sharmeela, M. R. Mohan, G. Uma and J. Baskaran., "A Novel Detection and Classification Algorithm for Power Quality
Disturbances using Wavelet", Americian Journal of Applied Sciences, 3(10), pp-2049-2053,2006
[2] N.P. Subramaniam and K. Bhoopathy Bagan, " Analysis of High Impedance Transients and Data Compression Using Wavelet
Transform", Serbian Journal of Electrical Engineering , Vol 3 ,No1, pp 19-31, June 2006.
[3] A.W. Galli and O. M. Nielsen, "Wavelet Analysis for Power System Transients", IEEE, Computer Applications in Power, pp 16 –
25 January 99.
[4] G. T. Heydt and A. W. Galli, "Transient Power Quality Problems Analyzed using Wavelets", IEEE Transactions on power delivery,
vol 12, No 2, pp.908-915,april 97
[5] S. Santoso and P. Hofmann, "Power Quality assessment via wavelet transform analysis" ,IEEE Transactions on power delivery.vol
11, No 2, pp-924-930,april 96
[6] Masoud Karimi, Hossein Mokhtari and M. Reza Iravani," Wavelet Based on line Disturbance Detection for Power Quality
Applications", IEEE Transactions on power delivery, vol 15, No 4, October 2000 .
[7] H.Y. Zhu and S. Chen, "Identification of Capacitor Switching Transients with Consideration of Uncertain System and Component
Parameters" IEEE Transactions on power delivery, vol 23, No 1,pp-213 - 220,Jan 08.
[8] Lee, Wang and Huang, "A Literature Survey of Wavelets in Power Engineering Applications", Proc.Natl.Sci.Counc ROC(A),Vol-
24,No-4,pp 249-258,2000.
[9] W. Kanitpanyacharoean and S. Premudeep preechacharn , "Power Quality Problem Classification Using Wavelet Transformation
and Artificial Neural Networks" , IEEE, 2004.
[10] V. Matz, T. Radil, P. Ramos and A. C. Serra, "Automated Power Quality Monitoring System On-line Detection and Classification
of Disturbances", Instrumentation and Measurement Technology Conferences, Warsaw Poland, May 1-3,2007.

Abstract :An asymmetrical pulse width modulated (APWM) dc-dc converters operating at constant frequency was simulated using Pspice software package. This converter incorporates constant frequency operation in a basic soft switching half bridge topology without any additional component and complexity. In this paper operation of converter configuration with capacitive filter in the output is discussed. A 5V, 50W converter was designed, fabricated using MOSFET and then tested to verify the characteristic of the converter. Due to asymmetrical duty ratio and zero voltage switching (ZVS) operation, this converter has low device voltage and current stresses wit no increase in conductively loss. This topology combines the best features of resonant (zero switching loss) and switched mode (low conduction loss) circuits.
Key words: Soft switching, Zero voltage switching (ZVS), Asymmetrical pulse width modulated (APWM), Zero current switching (ZCS), Switched mode power supplies (SMPS)

[1] Ned Mohan, Undeland and Robins, Power electronics converters, applications and design(John wiley and sons).
[2] R.L.Steigerwald, High frequency resonant transistor dc-dc converter, IEEE transaction.Industrial Electronics, Vol-1 no.3, May
1984
[3] F.C .Lee, High frequency quasi resonant and multi resonant converter topologies, in Proc, annual Conf. IEEE, Industrial
Electronics Soc.,1988.
[4] O.D. Patterson and D.M.Divan, Pseudo-resonant full bridge dc-dc converter, IEEETrans.PESC. REC.,1987
[5] F.C.Cee,etal, High frequency off line power conversion using zero voltage quasi resonant and multi resonant topologies, IEEE
Trans.. Power Electronics, Vol.4,no.4
[6] G.muo and Fred C.Lee, Soft switching techniques in PWM converters, IEEE trans.IE Vol.42,no.6

Abstract :Resonance coupling is a new technique for wireless energy transmission, which can transfer energy in middle distance. The purpose of this project is to build the prototype model to prove and demonstrate the concept of wireless energy transfer based on resonance coupling. It consists of a transmitter as an electromagnetic resonator and a receiver to which the device to be powered is attached. This paper analyzed the wireless transmission mechanism based on the coupling model of two type coils with 4 type different turn, and studied the relationship among output voltage, output current, distance, coil sizes and design application. Furthermore, based on resonances theory, we had provided an energy wirelessly to light on a led, turn on dc motor, phone charging and light on bulb within the distance for 0cm untill 5cm which uses magnetic field as transmission medium. Experimental results have validated the proposed design method.
Keywords: resonance coupling, wireless transfer energy, coil, rectifier, control circuits.

[1] Wenzhen Fu, Bo Zhang Member IEEE, Dongyuan Qiu Member IEEE, Wei Wang, "Analysis of Transmission Mechanism and
Efficiency of Resonance Coupling Wireless Energy Transfer System", College of Electric Engineering South China University of
Technology Guangzhou, P.R China.
[2] Jonathan S.Shipley,"Incorporating Wireless Power Transfer In An LED Lighting Application",School of Technology,Brigham
Young University,August 2006.
[3] Chunbo Zhu,Kai Liu,Chunlai Yu,Rui Ma,"Simulation and Experimental Analysis on Wireless Energy Transfer Based on Magnetic
Resonance", School of Engineering and Automation, Harbin Institute of Technology, Harbin,China.
[4] Benjamin Waters. Student Member, IEEE, High Q Resonant Coupling and RF-DC Conversion for Wireless Power Transfer,
August 2009.
[5] Rohan Bhutkar, Sahil Sapre,"Wireless Energy Transfer using Magnetic Resonance" Second International Conference on Computer
and Electrical Engineering,2009.
[6] Chunbo Zhu, Chunlai Yu, Kai Liu, Rui Ma, "Research on the topology of wireless energy transfer device" Vehicle Power and
Propulsion Conference, 2008. VPPC '08. IEEE, 3-5 Sept. 2008.
[7] J.Lin, A.Verma, J.Kim, S.W.Ko,S.J Pearton, "Microwave Wireless Power Transmission-A Systems Perspectively", Electrical and
Computer Engineering Department, University of Florida, Gainesville.
[8] S.Sheikh Mohamad,K.Ramasamy, "Wireless Power Transmission - A Next Generation Power Transmission System", Faculty of
Engineering, Dhafar University.
[9] Leopold Summerer, Oisin Purcell ESA ," Concepts for wireless energy transmission via laser"- Advanced Concepts Team
Keplerlaan 1, NL-2201AZ Noordwijk, The Netherlands,
[10] Shahrzard Jalali Mazlouman, Alireza Mahafar, Bozena Kaminska, Mid-range Wireless Energy Transfer Using Inductive Resonance
for Wireless Sensors, Simon Fraser University.