Comparative evaluation of two models of UPQC for suitable interface to enhance power quality

Basu, Malabika; Das, Subrat; Dubey, G. K.

doi:10.1016/j.epsr.2006.07.008

Cited by 86 publications

(34 citation statements)

References 8 publications

(10 reference statements)

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“…(6) The minimum value of duty cycle Dmin and maximum value of duty cycle Dmax used for a lossless boost converter is given by the following Equations. (7) Where, D max is the maximum duty ratio required to keep the converter in Continuous Conduction Mode (CCM) (8) Where, D min is the minimum duty cycle required to keep the converter in CCM Figure 5. Simulation of Solar PV with MPPT and Boost converter…”

Section: Dc/dcmentioning

confidence: 99%

“…In the series APF control scheme, a proportional-integral (PI) controller, meanwhile a PI controller and are designed in the shunt APF control scheme to relieve harmonic currents produced by nonlinear loads. Basu et al [8] have made a comparative evaluation of two models of UPQC for suitable interface to enhance power quality. Montero et al [9] have developed number of method for shunt active power filters used in three-phase system.…”

Section: Introductionmentioning

confidence: 99%

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Power Quality Improvement by Solar Photo-voltaic / Wind Energy Integrated System Using Unified Power Quality Conditioner

Samal¹,

Hota²

2017

IJPEDS

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The real problems in diminution of power quality occurs due to the rapid growth of nonlinear load are leads to sudden decrease of source voltage for a few seconds i.e sag, swell, harmonics in source and load current, voltage unbalance etc. All these problems can be compensated by using Unified Power Quality Controller (UPQC) and the operation of UPQC depends upon the available voltage across capacitor present in dc link. If the capacitor voltage is maintained constant then it gives satisfactory performance. The proposed research is basically on designing of Photo Voltaic (PV) /Wind energy fed to the dc link capacitor of UPQC so as to maintain proper voltage across it and operate the UPQC for power quality analysis. The said model is simulated in Matlab and results are verified by using FFT analysis.The proposed PV/ Wind energy-UPQC is design in Matlab simulation for reduction of voltage sag, swell, interruption of voltage, harmonics in load current and compensation of active and reactive power. Keyword:Conditioner Harmonics Power quality Solar PV Unified power quality Wind energy Copyright ©2017 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Sarita Samal, Department of Electrical Engineering, Veer Surendra Sai University of Technology, Burla, odisha, India Email: saritaruchy@gmail.com INTRODUCTIONThe use of electricity is increasing very rapidly so the necessity of renewable energy based source is required for interconnection to the distribution network. The main drawbacks of the renewable sources are the power generation is not continuous and it is season based. To overcome these disadvantages numbers of renewable sources are interconnected [1], [2]. The compensation principle and different control strategies of the UPQC in detail and performance of UPQC is examined by considering, a diode rectifier feeding an RL load (non linear load) that acts as a source of harmonics [3]. The theory, modeling and application of a unified power quality conditioner has been described by [4]. The coordinated and integrated control of solar PV generators with the maximum power point tracking (MPPT) control and battery storage control to provide voltage, frequency (V-f) and P-Q control, respectively, with PV generator and battery storage support to an islanded Microgrid [5]. Femia et al [6] have developed a scheme for maximum power point tracking (MPPT) of solar PV system using perturb and observe method. Gaeid et al [7] have design a unified power quality conditioner (UPQC) including a series and a shunt active power filter (APF) to compensate harmonics in both the distorted supply voltage and nonlinear load current. In the series APF control scheme, a proportional-integral (PI) controller, meanwhile a PI controller and are designed in the shunt APF control scheme to relieve harmonic currents produced by nonlinear loads. Basu et al [8] have made a comparative evaluation of two models of UPQC for suitable interface to enhance power quality. Montero et al [9] have developed number of method...

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Section: Dc/dcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power Quality Improvement by Solar Photo-voltaic / Wind Energy Integrated System Using Unified Power Quality Conditioner

Samal¹,

Hota²

2017

IJPEDS

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“…VSI_1 operates as a voltage source and protects sensitive loads (Load_1 and Load_2) against voltage sag/swell. VSI_2 operates as a current source and eliminates Load_1 current harmonics [11].…”

Section: Performance Of Open Upqcmentioning

confidence: 99%

Design a new OUPQC to mitigate harmonics in distribution networks like adjustable speed drive (non-linear) loads.

2017

IJMTER

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Abstract--With the quicker changes in the complexion of the power distribution system and the loads, it is very sure that several kinds of power quality disturbances are occur in a distribution system or a power load respectively and it is therefore important to introduce UPQC (Unified Power Quality Conditioner). The Unified power quality conditioner (UPQC) is an effective solid state power device for the enhancement of power quality due to its quick response, high reliability and nominal cost. A UPQC is used to compensate deep voltage sags, voltage unbalances and harmonics. It is efficiently capable of protecting sensitive loads against the voltage variations or disturbances. UPQC employs two converters that are connected to a common DC link with an energy storage capacitor. UPQC is the emerging device of Solid state Power, which combines the functions of series voltage compensator, shunts current compensator. The open unified power quality conditioner (OUPQC), composed of a power-electronic series main unit installed in the medium-voltage/low-voltage (LV) substation, along with several powerelectronic shunt units connected close to the end users. The series and parallel units do not have a common dc link, so their control strategies are independent of each other.Simulation results are presented to verify the effectiveness and feasibility of the proposed topology.

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“…A four wire capacitor midpoint shunt APF with a predictive control technique is used to mitigate the supply current harmonics and the neutral current, thus balanced supply current is achieved [10]. A different type of controller method exists to improve the power quality problems based on the PI control [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Control Strategy Based Multi Converter UPQC using with Fuzzy Logic Controller for Power Quality Problems

Babu¹,

Dash²,

Subramani³

et al. 2015

Journal of Electrical Engineering and Technology

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-A custom power device provides an integrated solution to the present problems that are faced by the utilities and power distribution. In this paper, a new controller is designed which is connected to a multiconverter unified power quality conditioner (MC-UPQC) for improving the power quality issues adopted modified synchronous reference frame (MSRF) theory with Fuzzy logic control (FLC) technique. This newly designed controller is connected to a source in order to compensate voltage and current in two feeders. The expanded concept of UPQC is multi converter-UPQC; this system has a two-series voltage source inverter and one shunt voltage source inverter connected back to back. This configuration will helps mitigate any type of voltage / current fluctuations and power factor correction in power distribution network to improve power quality issues. In the proposed system the power can be conveyed from one feeder to another in order to mitigate the voltage sag, swell, interruption and transient response of the system. The control strategies of multi converter-UPQC are designed based on the modified synchronous reference frame theory with fuzzy logic controller. The fast dynamics response of dc link capacitor is achieved with the help of Fuzzy logic controller. Different types of fault conditions are taken and simulated for the analysis and the results are compared with the conventional method. The relevant simulation and compensation performance analysis of the proposed multi converter-UPQC with fuzzy logic controller is performed.

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Comparative evaluation of two models of UPQC for suitable interface to enhance power quality

Cited by 86 publications

References 8 publications

Power Quality Improvement by Solar Photo-voltaic / Wind Energy Integrated System Using Unified Power Quality Conditioner

Power Quality Improvement by Solar Photo-voltaic / Wind Energy Integrated System Using Unified Power Quality Conditioner

Design a new OUPQC to mitigate harmonics in distribution networks like adjustable speed drive (non-linear) loads.

An Efficient Control Strategy Based Multi Converter UPQC using with Fuzzy Logic Controller for Power Quality Problems

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