A two-phase three-wire quasi-Z-source based railway power quality compensator for AC rail networks

Kaleybar, Hamed Jafari; Kojabadi, Hossein Madadi; Brenna, Morris; Foiadelli, Federica; Fazel, Seyed Saeed

doi:10.1109/eeeic.2017.7977713

Cited by 10 publications

(6 citation statements)

References 19 publications

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“…As second application scenario, railway traction systems also take advantage of 2Φ3w topology, consequently leading to research on the control of power converters. In [19], a 2Φ3w quasi-Z-source compensator is employed to devise power quality improvement in AC rail networks, mainly achieving mitigation of harmonic currents, negative sequence compensation and power factor correction. Another novel converter topology, comprising two step-down transformers, and based on 2Φ3w configuration, is proposed in [13] for elimination of negative sequence components in railway traction systems, also striving for reduction of power switches ratings.…”

Section: A Comprehensive Literature Reviewmentioning

confidence: 99%

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Alonso¹,

Oliveira²,

Brandão³

et al. 2022

Eletrônica de Potência

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Multifunctional inverters play an important role in electrical grids due to their capability to provide active power conversion from photovoltaic (PV) systems, as well as by concomitantly offering ancillary services that provide grid support and power quality improvement. Although control strategies for such inverters have been extensively explored for applications in single-and threephase grids, their consideration for the two-phase threewire topology has been superficially discussed in literature. Thus, first, this paper contributes to the literature by presenting a comprehensive review about the control of power electronic inverters in two-phase threewire grids. As second contribution, this paper proposed a flexible control strategy based on the Conservative Power Theory capable of adequately synthesizing control references for a PV-based multifunctional inverter operating in a two-phase three-wire grid. Additionally, power quality services can be selectively offered by the inverter to achieve compensation of reactive, harmonic and unbalance current terms, as well as providing reduction in neutral currents. Hardware-in-the-loop experimental results comprising a multifunctional PV inverter under several scenarios of operation are shown to demonstrate and validate the flexibility of the method.

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Section: A Comprehensive Literature Reviewmentioning

confidence: 99%

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Alonso¹,

Oliveira²,

Brandão³

et al. 2022

Eletrônica de Potência

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“…In that regard, hybrid TW-RPC is presented in [23]. In addition to this, in [24], a quasi-Z-source TW-RPC is proposed and, in [25], a Z-source TW-RPC is proposed to decrease the ratings of the RPC converter. In [26], a TW-RPC with an isolation Scott transformer is proposed, which converts the two-phase traction power grid to a nearly balanced three-phase power system; this helps to reduce the RPC power ratings.…”

Section: Introductionmentioning

confidence: 99%

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

et al. 2020

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Electric locomotives in AC traction power systems represent a huge single-phase non-linear load and, detrimentally, affect the power quality and the efficiency of the three-phase power grid. Nevertheless, along the last decades, power electronics are being used to mitigate power quality problems in the three-phase power grid. In particular, Rail Power Conditioner (RPC) helps to increase the loading capacity of traction substations and improve the power quality of three-phase power grids. As the main characteristics, an RPC can supply reactive power, suppress current harmonics and overcome currents imbalance of the three-phase power grid. On the other hand, the traction substations may be constituted by different types of power transformers. For instance, single-phase power transformers and open-delta (V/V) power transformers are widely used, while Scott power transformers are less frequently used, since they are more complex and expensive. In this framework, this work presents a review study of RPC topologies, including their operation modes, and a comprehensive comparison between the characteristics of the RPC topologies when using different types of AC traction substations and power transformers. This helps to ensure the correct selection of the RPC topology for a specific application, according to the main structure of the traction substation. Consequently, and based on the established review, it is possible to sort and allocate each RPC topology for limited or wider applications.

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“…The RAPQCs penetration was increasing so much that many research studies have been presented dealing with different aspects like configuration, and control methods (Hu et al, 2013; Kaleybar et al, 2018; Ma et al, 2012). Various control methods like the Fryze-Buchholz-Depenbrock (FBD) (Shu et al, 2010), modified single-loop Instantaneous reactive power (IRP) theory (Dai et al, 2014), synchronous reference frame (SRF)-based method (Kaleybar et al, 2017), efficient harmonic extraction algorithm (Tan et al, 2004b), fuzzy logic-based IRP strategy (Kaleybar and Farshad, 2016), the linearized model-based strategy (Roudsari et al, 2018) and a passivity-based method (Min et al, 2017) have been presented for control of RAPQCs. Besides the significant features of these methods, most of these strategies are according to the linear models and contains function failure due to the estimation errors.…”

Section: Introductionmentioning

confidence: 99%

Dual-loop generalized predictive control method for two-phase three-wire railway active power quality controller

Kaleybar

Brenna

Foiadelli

2020

Transactions of the Institute of Measurement and Control

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One of the most challenging topics in electric railway networks (ERNs) is power quality (PQ) problems caused by single-phase feeding of time-varying and high-power locomotives. During previous years, many techniques and compensators have been offered to alleviate these problems. Railway active power quality controller (RAPQC) is considered as one of the most efficient approaches. Due to the time-variant, uncertainty and distorted features of ERNs, the controlling of RAPQCs has always been a substantial concern to experts. This paper presents, a new robust control system for two-phase three-wire RAPQC (ThRAPQC) based on generalized model predictive control integrated with modified instantaneous reactive power theory (GMPC-MIRP). A dual-loop balancing system has been adopted in the proposed control system to equalize the active powers of traction power substation (TPSS) adjacent feeders, compensate reactive powers and suppress harmonic simultaneously. The performance of the proposed method in comparison with the conventional Fryze-Buchholz-Depenbrock (FBD)-based current strategy together with hysteresis current controller (FBD-HCC) has been evaluated through the detailed simulations and Opal-RT 5600-based laboratory setup results. The fast response, high precision, lower fluctuation in reference current tracking and high capability of working in distorted conditions are the outstanding privileges of the proposed method that are confirmed by the output results.

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A two-phase three-wire quasi-Z-source based railway power quality compensator for AC rail networks

Cited by 10 publications

References 19 publications

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

Dual-loop generalized predictive control method for two-phase three-wire railway active power quality controller

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