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
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[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:
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[5] Static Synchronous Series Compensator: A Solid-state Approach to the Series Compensation of Transmission Lines, L. Gyugyi, C.
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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.