Unified power quality conditioner (UPQC): the principle, control and application

Gu, Jiande; Xu, Dianguo; Liu, Hankui; Gong, Ming

doi:10.1109/pcc.2002.998518

Cited by 48 publications

(24 citation statements)

References 6 publications

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“…During the system dynamic conditions, for example, sudden load change, voltage sag, the dc-link feedback controller should respond as fast as possible to restore the dc-link voltage at set reference value, with minimum delay as well as lower overshoot. The proportional-integral (PI)-regulator-based dc-link voltage controller is simple to implement and hence widely used by the researches [12]- [14], [16]- [20], [22], [23], [26]- [33], [36], [38], [40], [42], [46]- [48], [50], [54], [56], [60], [61], [64], [67], [68], [75]- [77], [81]- [84], [88]- [90], [92], [94], [95], [100], [103]- [105], [108], [109], [111]- [114], [116], [117], [119], [122], [124], [126]- [128], [130]- …”

Section: Upqc-state Of the Artmentioning

confidence: 99%

“…However, the cutoff frequency of these LPF or HPF can affect the dynamic performance of the controller. The UPQC controller based on three-phase pq can be found in [14], [16], [17], [27], [32], [52], [98], [104], [109], [113], [114], and [126], while dq method based controller can be found in [12], [18], [19], [22], [25], [26], [33], [45], [47], [68], [75], [81], [84], [88], [89], [95], [105], [111], [112], [114], [117], [121], [128], [135], [143], [152], [153], [158], [161], and [167]. The original three-phase pq theory exhibits limitations when the supply voltages are distorted and/or unbalanced.…”

Section: Control Techniques For Upqcmentioning

confidence: 99%

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Enhancing Electric Power Quality Using UPQC: A Comprehensive Overview

Khadkikar¹

2012

IEEE Trans. Power Electron.

623

275

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This paper presents a comprehensive review on the unified power quality conditioner (UPQC) to enhance the electric power quality at distribution levels. This is intended to present a broad overview on the different possible UPQC system configurations for single-phase (two-wire) and three-phase (three-wire and four-wire) networks, different compensation approaches, and recent developments in the field. It is noticed that several researchers have used different names for the UPQC based on the unique function, task, application, or topology under consideration. Therefore, an acronymic list is developed and presented to highlight the distinguishing feature offered by a particular UPQC. In all 12 acronyms are listed, namely, UPQC-D, UPQC-DG, UPQC-I, UPQC-L, UPQC-MC, UPQC-MD, UPQC-ML, UPQC-P, UPQC-Q, UPQC-R, UPQC-S, and UPQC-VA m in . More than 150 papers on the topic are rigorously studied and meticulously classified to form these acronyms and are discussed in the paper.Index Terms-Active power filter (APF), harmonic compensation, power quality, reactive power compensation, unified power quality conditioner (UPQC), voltage sag and swell compensation.

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Section: Upqc-state Of the Artmentioning

confidence: 99%

Section: Control Techniques For Upqcmentioning

confidence: 99%

Enhancing Electric Power Quality Using UPQC: A Comprehensive Overview

Khadkikar¹

2012

IEEE Trans. Power Electron.

623

275

View full text Add to dashboard Cite

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“…It is commonly configured with two voltage source converters connected back to back through a DC link capacitor. However, voltage source topology of UPQC has a drawback of slow control of onverter output voltage and no short circuit protection [7]- [8]. In addition, when the active rectifier inside UPQC is used as a power factor corrector, DC bus voltage oscillations appears which makes the control of the series filter output voltage more difficult.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Power Quality by using Unified Power Quality Conditioner with PID and Fuzzy Logic Controller

Rao¹,

Dash²

2010

IJCA

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In this paper unified power quality conditioner (UPQC) is being used as a universal active power conditioning device to mitigate both current as well as voltage harmonics at a distribution end of power system network. The performance of UPQC mainly depends upon how quickly and accurately compensation signals are derived. The steady state and dynamic operation of control circuit in different load current and/or utility voltages conditions is studied through simulation results. The presented method has acceptable dynamic response with a very simple configuration of control circuit. This paper presents performance validation of Current Source Inverter (CSI)-based UPQC using Fuzzy Logic Controller (FLC) and Results are compared with conventional PID Controller and improvements are observed by FLC. The FLC-based compensation scheme eliminates voltage and current magnitude of harmonics with good dynamic response. Extensive simulation results using Matlab/Simulink for RL load connected through an uncontrolled bridge rectifier validates the performance of FLC compensator.

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“…The rotor side converter is connected in shunt like a conventional DFIG. The structure and control of the converters is similar to that of a Unified Power Quality Conditioner (UPQC) [10], [11], hence the new generator is referred as UPQC integrated Wind Generator (UPQC-WG). Similar structure of DFIG has bee reported in [7] and [8].…”

Section: Introductionmentioning

confidence: 99%