Designing of multilevel DPFC to improve power quality

Krishna, B. Vamsi; Prashanth, B. Venkata; Anjaneyulu, K. S. R.

doi:10.1109/iceeot.2016.7755494

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…Distributed static series compensator (DSSC) only contains the series side converter, so it can not realize the comprehensive control of the line power flow at the same time. Composed of series converter and shunt converter without direct connection, unified distributed power flow controller (UDPFC) has more powerful functions than device consists of independent series converter or shunt converter [5,6]. But this is under the precondition of energy exchange between series converter and shunt converter through transmission line [7].…”

Section: Introductionmentioning

confidence: 99%

Research on the harmonic currents rates for the exchanged energy of unified distributed power flow controller

Tang

Qiu

et al. 2022

IET Generation Trans & Dist

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The energy exchange between series and shunt converters is the basis for the powerful functioning of the unified distributed power flow controller, which can be realized through the 3rd harmonic current. In this paper, based on the established 3rd harmonic equivalent network of unified distributed power flow controller power system, the influence of the additional loss caused by the 3rd harmonic current on the line transmission capacity is analysed. The mathematical relationship between the neutral point voltage of the transformer and the 3rd harmonic current is constructed, and it is simplified according to the different 3rd harmonic currents. By analysing the power relationship of the 3rd harmonic equivalent network, it is found that there is a contradiction between improving the 3rd harmonic output efficiency of the shunt single‐phase converter and reducing the neutral point insulation voltage of the transformer. The constraint conditions of the 3rd harmonic current are simulated by the advanced digital power system simulator. Finally, the method of obtaining the economical and safe 3rd harmonic current value range is summarized, which provides a theoretical basis and reference for the device parameter design.

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Section: Introductionmentioning

confidence: 99%

Research on the harmonic currents rates for the exchanged energy of unified distributed power flow controller

Tang

Qiu

et al. 2022

IET Generation Trans & Dist

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“…The main benefits of the DPFC has small cost due to low voltage isolation and the small components rating of the series converter, good reliability owing to redundancy of series converter and real power exchange between the both converters of DPFC via transmission line at the third harmonic frequency. The feedback controllers and reference signals generation method for FACTS devices has been reported in [9][10][11][12]. The classical linear controller design for shunt and series converter of DPFC has been reported [13][14].…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of DPFC for multi-bus power system

Krishna¹,

Prashanth²,

Sujatha³

2018

IJET

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In current days, the power quality issues in the interconnected power system are mainly happens due to the demand of electricity and utilization of large non-linear loads as well as inductive/capacitive loads. The power quality cries are voltage sag and swell in multi-bus power system (MBPS). In this article studies on a two bus, three bus and five bus power systems using DPFC. In order to eliminate the voltage sag and swell in the MBPS, a distributed power flow controller (DPFC) is designed. The structure of the DPFC consists of three-phase shunt converter and three single series phase converters. Both these converters are arranged in back-back voltage source inverters (VSIs). These converters are controlled with help of the pulse width modulation (PWM) scheme. The feedback controllers and reference signals are derived the PWM for DPFC to magnify the power quality problems in MBPS. The performance of the model is investigated at different loads by making of MATLAB/Simulink model. The simulation results are presented.

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