An Improved iUPQC Controller to Provide Additional Grid-Voltage Regulation as a STATCOM

França, Bruno Wanderley; Silva, Leonardo Francisco da; Aredes, Maynara A.; Aredes, Maurício

doi:10.1109/tie.2014.2345328

Cited by 66 publications

(23 citation statements)

References 31 publications

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“…Beberapa contoh teknologi elektronika daya adalah inverter VSI [6], menggunakan energy storage [7], menggunakan STATCOM [8], [9], menggunakan OLTC [10], dan menggunakan rangkaian Magnetic Energy Recovery System (MERS).…”

Section: Gbr 1 Kontrol Tegangan Mersunclassified

Aplikasi Magnetic Energy Recovery Switch sebagai Dynamic Voltage Restorer pada motor Induksi

Artakusuma¹,

Wijaya²,

Firmansyah³

2018

Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI)

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Abstract-Renewable energy source likes solar panel and wind turbine have intermittent character from instability power source generated. The instability power source can make dip voltage in power grid which happen in half cycle until few seconds. To stabilize the voltage in power grid from dip voltage, some methods have been developed using power electronics technology like VSI inverter, STATCOM, energy storage, OLTC, and MERS. The power electronic circuits have some advantages, such as small dimensional size and lightweight to keep voltage in power grid. In this paper, the MERS circuit was applied in induction motor which has small full bridge circuit, uncomplexity computation, and low switching frequency, so it needs low end hardware requirement. This paper proposed the use of MERS dc capacitor with 50% value from induction motor resistance. The result shows that MERS has advantage and can keep the voltage in power grid when the voltage below 39% and 15% above rated voltage (220 V rms ) with the recovery time around 0.3 second and keep the dip voltage over 1 second.Intisari-Sumber energi terbarukan berupa panel surya dan turbin angin bersifat intermitten dikarenakan ketidakstabilan daya yang dihasilkan. Ketidakstabilan daya menyebabkan terjadinya dip voltage pada tegangan jaringan, baik dalam beberapa siklus gelombang maupun sampai beberapa detik. Untuk menjaga kestabilan tegangan pada jaringan dari dip voltage, beberapa metode telah dikembangkan dengan menggunakan teknologi elektronika daya, seperti inverter VSI, STATCOM, energy storage, OLTC, dan rangkaian MERS. Rangkaian elektronika daya mempunyai keuntungan berupa dimensi rangkaian yang kecil dan kompak untuk menjaga tegangan jaringan. Pada makalah ini, rangkaian MERS diaplikasikan pada motor induksi karena kesederhanaan rangkaian yang berbentuk full-bridge, komputasi yang tidak kompleks, dan penyakelaran frekuensi rendah sehingga tidak membutuhkan perancangan perangkat keras high end. Makalah ini mengajukan perhitungan nilai kapasitor dc pada rangkaian MERS dengan nilai 50% dari hambatan total motor induksi. Hasil simulasi menunjukkan bahwa MERS mempunyai kelebihan dan dapat menjaga tegangan jaringan saat tegangan lebih rendah dari 220 Vrms sampai 39% dan saat tegangan lebih tinggi dari 220 Vrms sampai 15%. Waktu perbaikan yang diperlukan adalah sekitar 0,3 detik dan tegangan dapat terjaga dari dip voltage lebih dari 1 detik.Kata Kunci-dip voltage; intermitten renewable energy sources, induction motor, MERS.

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Section: Gbr 1 Kontrol Tegangan Mersunclassified

Aplikasi Magnetic Energy Recovery Switch sebagai Dynamic Voltage Restorer pada motor Induksi

Artakusuma¹,

Wijaya²,

Firmansyah³

2018

Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI)

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“…To overcome the most problems related to PQ, single‐phase and three‐phase series‐parallel active power‐line conditioners, known as unified power quality conditioners (UPQC), have been employed in there‐phase three‐ and four‐wire systems (3P3W and 3P4W) by means of different configurations and control strategies.…”

Section: Introductionmentioning

confidence: 99%

“…For control purposes, conventional strategies of power‐line compensating usually use non‐sinusoidal voltage/current references to control both voltages and currents of the series and the parallel converters . In this paper, the dual/inverted compensating strategy is adopted to control the parallel converter for acting as a sinusoidal voltage source and the series converter for working as a sinusoidal current source . As a consequence, the complexity of the reference generation algorithms is reduced due to the sinusoidal control references can be achieved more easily …”

Section: Introductionmentioning

confidence: 99%

Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Modesto

Silva

Oliveira

2020

Int Trans Electr Energ Syst

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Summary This work proposes a 3‐phase 4‐wire unified power quality conditioner (UPQC) structure, which has ability to operate with per‐phase independent grid current control, reduced dc‐bus voltage and inverted/dual compensation strategy. Since the grid currents are controlled by the series converter, two distinct strategies, namely, independent current compensation strategy (ICCS) and load unbalance compensation strategy (LUnCS) can be employed. Using the ICCS, the controls of the grid currents are performed independently per‐phase, such that the UPQC can operate even when grid voltage outage occurs in one or two phases of the power source. Furthermore, to guarantee the proper parallel converter operation, the dc‐bus voltage amplitude must be higher than the grid voltage peak amplitude. Thus, since the parallel converter operation is assured, the functioning of the series converter is also guaranteed because it needs lower dc‐bus amplitude to operate. However, depending on the converter topology adopted in the parallel converter, the series converter could be subjected to operate with dc‐bus voltage higher than necessary. Thus, to minimize this aspect, this paper proposes a UPQC scheme composed of 3‐Leg split‐capacitor (3‐Leg‐SC) and 4‐Leg topologies, operating as series and parallel converters, respectively. Thus, besides the use of the ICCS, lower dc‐bus voltage is allowed when compared to the UPQC composed of two 3‐Leg‐SC converters, as well as reduced power switches number is achieved when the propose scheme is compared to UPQC composed of two 4‐Leg converters. Extended experimental results based on digital signal controller are presented to evaluate the effectiveness and performance of the proposed UPQC.

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“…UPQCs are applicable when both voltage and current power quality problems have to be compensated for in distribution networks [5,6]. The series converter of the UPQC compensates for the voltage distortion of the grid to protect sensitive loads while the shunt converter compensates for the current harmonics drawn by disturbing loads in order to obtain a clean grid current.…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the fixed-grid-frequency approach present in the literature, UPQCs have some other obvious drawbacks: 1) High costs: UPQCs require high switching frequency, f sw (typically f sw ! 10 kHz in [4,5,[11][12][13]) and require a complex hardware (two converters, sensors, passive filters and series transformer). Besides, hysteresis current controllers are often used with variable switching frequency posing a complicated design problem [11].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive control for unified power quality conditioners

Ochoa-Gimenez

García-Cerrada

Zamora-Macho

2017

J. Mod. Power Syst. Clean Energy

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This paper presents a comprehensive control strategy for unified power quality conditioners (UPQCs) to compensate for both voltage and current quality problems. The controllers for the series and shunt components of the UPQC are, equally, divided into three blocks: À main controller, which deals with the fundamental-frequency issues such as active and reactive power flow;`harmonic controller, which ensures zero-error tracking while compensating voltage and current harmonics;´the set-point generation block, which handles the different control objectives of the UPQC. The controller design procedure has been simplified to the selection of three parameters for each converter. Furthermore, the proposed strategy can be implemented measuring only four variables, which represents a reasonable number of sensors. In addition, a pulse width modulation (PWM)-based modulation with fixed switching frequency is used for both converters. The proposed control strategy has been validated experimentally under different conditions, including grid-frequency variations.

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An Improved iUPQC Controller to Provide Additional Grid-Voltage Regulation as a STATCOM

Cited by 66 publications

References 31 publications

Aplikasi Magnetic Energy Recovery Switch sebagai Dynamic Voltage Restorer pada motor Induksi

Aplikasi Magnetic Energy Recovery Switch sebagai Dynamic Voltage Restorer pada motor Induksi

Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Comprehensive control for unified power quality conditioners

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