D-STATCOM for harmonic mitigation in low voltage distribution network with high penetration of nonlinear loads

Rohouma, Wesam; Balog, Robert S.; Peerzada, Aaqib Ahmad; Begović, Miroslav

doi:10.1016/j.renene.2019.05.134

Cited by 84 publications

(47 citation statements)

References 12 publications

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“…The average switching power loss in the switch due to the switching transitions can be approximated based on (15) and (16) [38], and is given by…”

Section: A Background On Switching Losses In Power Electronicsmentioning

confidence: 99%

“…1, is capable of performing the functions of a standard D-STATCOM while also increasing the service life of the converter, hence increasing the overall reliability of the power system [14]. The proposed topology is based on a matrix converter (MC) and inductive energy storage, which is controlled using a finite control set model predictive control (MPC) [15][16][17][18][19]. Our proposed configuration is different from CSI topology, in our configuration that is based on MC topology, bidirectional IGBT modules are used as power switches, while in CSI topology, reverse voltage blocking capabilities are needed which makes the configuration more complex and reduce the efficiency compared with the traditional topologies [20].…”

Section: Introductionmentioning

confidence: 99%

“…[22][23][24]. MPC cost function allows multi-objective control within one control loop, which makes MPC simpler to implement compared to other control strategies [15]. MPC controlled MC has been shown to outperform other control strategies in transient operation [33] and shows a faster dynamic response [34,35].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive Model Predictive Controller to Reduce Switching Losses for a Capacitor-Less D-STATCOM

Rohouma

Metry

Balog

et al. 2020

IEEE Open J. Power Electron.

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In the post-industrial digital-economy, motors powering manufacturing have been replaced by computers powering ecommerce-with significant financial losses attributable to poor power quality (PQ). At the same time, increasing penetration of distributed generation and constant power loads complicate the job for the electric utilities to deliver high-quality electrical power. Traditionally, voltage source converters provide PQ compensation; the backbone of these converters, however, are large electrolytic capacitors (e-caps), which have well-known failure rates. A D-STATCOM that does not use e-caps was shown to increase the converter service life and increase the reliability of the power system; finite control set model predictive control (MPC) was shown to achieve high fidelity tracking for multi-objective cost functions. However, high fidelity (to achieve low total harmonic distortion) results in high switching frequency, which increases losses and device stresses, and reduces the overall converter reliability. This paper improves the capacitorless D-STATCOM by investigating an adaptive MPC that trades-off highfidelity performance and switching frequency, subject to IEEE 519 THD standards, to achieve good-enough performance. The method is verified experimentally in a 7.5 kVA D-STATCOM hardware prototype. The results show a reduction in switching frequency by over 30% compared with the MPC methods that prioritize high-fidelity alone.

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“…The average switching power loss in the switch due to the switching transitions can be approximated based on (15) and (16) [38], and is given by…”

Section: A Background On Switching Losses In Power Electronicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive Model Predictive Controller to Reduce Switching Losses for a Capacitor-Less D-STATCOM

Rohouma

Metry

Balog

et al. 2020

IEEE Open J. Power Electron.

Self Cite

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“…Sirjani ve Jordehi, D-STATCOM'un güç sistemlerinde kullanılma hedeflerinin, güç kaybının azaltılması, gerilim kalitesinin ve sistem güvenirliğinin arttırılması olarak belirtmişlerdir [6]. Rohouma ve çalışma arkadaşları, D-STATCOM'un şebekeye bağlandığı noktada güç kalitesini artırdığını ve doğrusal olmayan yüklerin sebebiyet verdiği harmonik bileşenleri azalttığını göstermişlerdir [7]. Bu çalışmada Matlab Simulink programı kullanılarak mikro şebeklerde güç kalitesinin iyileştirilmesi için kullanılmak üzere bir D-STATCOM benzetimi gerçekleştirilmiştir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Desing and Analysis of D-STATCOM for Improving Power Quality in Micro Grids

Kabalcı

Taşdemi̇r

2021

Politeknik Dergisi

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Endüstriyel uygulamalarda kullanılan yüklerin büyük bir kısmı gelişen teknolojiyle birlikte endüktif yüklerden oluşmaktadır. Endüktif yükler, yapıları gereği endüktif reaktif enerji tüketmektedirler. Tüketilen bu reaktif enerji, sistemin kalitesinde ve verimliliğinde düşüşe ve güç faktöründe sorunlara neden olmaktadır. Esnek alternatif akım iletim sistemleri (FACTS), güç sisteminin performansını ve kalitesini arttırmada önemli bir rol oynamaktadır. FACTS sistemiyle donatılmış bir güç sisteminin kontrolü daha hızlı ve kolaydır. Dağıtım Statik Senkron Kompanzatör (D-STATCOM), güç kalitesini arttırmak için kullanılan en yaygın FACTS cihazıdır. Reaktif güç kontrolü için kullanılan D-STATCOM, dağıtım sistemlerinde güç kalitesini arttırmak amacıyla kullanılan şönt bir cihazdır. D-STATCOM şebeke ile reaktif güç alış verişinde bulunarak gerilim dalgalanmalarını önler. Bu çalışmada, güç kalitesi problemlerinin kaynağında yok edilebilmesi için dağıtım hattıyla reaktif güç alışverişi yapan ve gerilim kaynaklı dönüştürücü temeline dayanan D-STATCOM’un modellenmesi MATLAB Simulink kullanılarak yapılmış ve benzetim sonuçları incelenmiştir. Modellenen sistemde, 4 km uzunluğunda bir dağıtım hattı, hat sonunda kompanzasyon için kullanılan D-STATCOM, 16,40 kVA (10kW+13kVAR) ve 22,36 kVA (10kW+20kVAR) gücünde iki ayrı test yükü kullanılmıştır. Bu yüklerin dağıtım hattında meydana getirdiği güç kalitesi problemleri modellenen D-STATCOM aracılığıyla giderilmeye çalışılmıştır. Yapılan benzetime göre, D-STATCOM şebekeye bağlandığında, sistemdeki gerilim dalgalanmasının ve toplam harmonik distorisyonunun (THD) büyük oranda azaldığı doğrulanmıştır. Sonuç olarak, D-STATCOM’un şebekedeki değişken yüklerin neden olduğu gerilim artışını veya çökmesini büyük ölçüde giderdiği, güç kaybını azalttığı ve buna bağlı olarak da gerilim kararlılığını arttırdığı gösterilmiştir.

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“…As already mentioned, there are many works that explored traditional voltage regulation equipment, such as step voltage regulators [2], switched capacitors [1], and on-load tap changers (OLTC) [1]. The applications of more sophisticated technologies have also been described by previous works, including low-voltage static var compensators (LV-SVCs) [18], distributed energy-storage systems [19], static synchronous compensator (STATCOM) [20], and microgrids providing ancillary service [21].…”

Section: Introductionmentioning

confidence: 99%

Voltage Regulation Planning for Distribution Networks Using Multi-Scenario Three-Phase Optimal Power Flow

2019

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Active distribution networks must operate properly for different scenarios of load levels and distributed generation. An important operational requirement is to maintain the voltage profile within standard operating limits. To do this, this paper proposed a Multi-Scenario Three-Phase Optimal Power Flow (MTOPF) that plans the voltage regulation of unbalance and active distribution networks considering typical scenarios of operation. This MTOPF finds viable operation points by the optimal adjustments of voltage regulator taps and distribution transformer taps. The differentiating characteristic of this formulation is that in addition to the traditional tuning of voltage regulator taps of an active network applied for just one scenario of load and generation, it also performs the optimal adjustment of distribution transformer taps, which, once fixed, is able to meet the voltage limits of diverse operating situations. The optimization problem was solved by the primal-dual interior-point method and the formulation was tested using the IEEE 123-bus system.Energies 2020, 13, 159 2 of 21 Thus, this research adjusted a single-period Three-Phase Optimal Power Flow (TOPF), proposed by the authors of [1], into a multi-scenario formulation that assists the voltage regulation planning of a distribution network, making not only the traditional adjustments of voltage regulators, but also of the distribution transformers taps (DT) that simultaneously satisfy different configurations of load and DG power injections (that depends on the solar incidence, for example) during a typical day.The adjustments proposed in this article considered a large insertion of photovoltaic (PV) generation, which required careful monitoring to not exceed operational limits of the network and equipment. Therefore, to address these questions, it was necessary to act on the step voltage regulators and on the distribution transformers taps that existed along the feeders to control the voltage profile.To do this, the purpose of this article was to propose an optimization problem that applies to a three-phase unbalanced network (besides the conventional control actions, such as voltage regulator taps, as [2]) and DT tap adjustments to monitor the voltage profile, considering not only one point of operation, but a combination of multiple scenarios simultaneously (MTOPF). The consideration of multiple periods (or scenarios) must be made because after the DTs taps are fixed at planned positions, they do not change during the operation time. So, this tap allocation satisfies different conditions of load and DG penetrations (with pre-establishment of a different combination of scenarios) while minimizing the total electrical losses.Besides the description of the MTOPF proposed, some variations of this main idea were developed in a way to validate its results. We also proposed a parametrization of loads and GD insertions that allowed the execution of each scenario individually. This formulation was named PTOPF, and it can confront the results of a single-period f...

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D-STATCOM for harmonic mitigation in low voltage distribution network with high penetration of nonlinear loads

Cited by 84 publications

References 12 publications

Adaptive Model Predictive Controller to Reduce Switching Losses for a Capacitor-Less D-STATCOM

Adaptive Model Predictive Controller to Reduce Switching Losses for a Capacitor-Less D-STATCOM

Desing and Analysis of D-STATCOM for Improving Power Quality in Micro Grids

Voltage Regulation Planning for Distribution Networks Using Multi-Scenario Three-Phase Optimal Power Flow

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