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Beloqui Larumbe, L. (author), Qin, Z. (author), Bauer, P. (author)Several efforts are being done nowadays to improve the modelling of Wind Turbine Systems (WTSs) for harmonic analysis in Offshore Wind Power Plants (OWPPs). Due to the high influence of the different control structures in the Power Electronic Converters (PECs) on the dynamic response of a WTS, each structure needs to be modelled specifically....conference paper 2018
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Narayan, N.S. (author), Papakosta, Thekla (author), Vega Garita, V.E. (author), Qin, Z. (author), Popovic, J. (author), Bauer, P. (author), Zeman, M. (author)The rapid increase in the adoption of Solar Home Systems (SHS) in recent times hopes to ameliorate the global problem of energy poverty. The battery is a vital but usually the most expensive part of an SHS; owing to the least lifetime among other SHS components, it is also the first to fail. Estimating battery lifetime is a critical task for...journal article 2018
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Shekhar, A. (author), Ramirez Elizondo, L.M. (author), Qin, Z. (author), Bauer, P. (author)Back-to-back Modular multilevel converters (MMC) for medium voltage dc (MVDC) distribution link applications offer exciting opportunities due to its superior harmonic performance and high efficiency. Based on the steady state equations, it is shown that under specific active and reactive power operation, an increase in dc link voltage can be...conference paper 2018
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Yu, Y. (author), Narayan, N.S. (author), Vega Garita, V.E. (author), Popovic, J. (author), Qin, Z. (author), Wagemaker, M. (author), Bauer, P. (author), Zeman, M. (author)The past few years have seen strong growth of solar-based off-grid energy solutions such as Solar Home Systems (SHS) as a means to ameliorate the grave problem of energy poverty. Battery storage is an essential component of SHS. An accurate battery model can play a vital role in SHS design. Knowing the dynamic behaviour of the battery is...journal article 2018
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Shekhar, A. (author), Soeiro, Thiago B. (author), Qin, Z. (author), Ramirez Elizondo, L.M. (author), Bauer, P. (author)An important step in Voltage-Source Modular Multilevel Converter (MMC) design is the selection of adequate semiconductor blocking voltage class. This paper highlights that particularly for grid connected medium voltage applications, the choice of suitable switch blocking voltage class is not so straightforward. The market available switch...conference paper 2018
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Bandyopadhyay, S. (author), Chandra Mouli, G.R. (author), Qin, Z. (author), Ramirez Elizondo, L.M. (author), Bauer, P. (author)Microgrid with integrated photo-voltaics (PV) and battery storage system (BSS) is a promising technology for future residential applications. Optimally sizing the PV system and BSS can maximise self-sufficiency, grid relief, and at the same time can be cost-effective by exploiting tariff incentives. To that end, this paper presents a...journal article 2019
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Wang, Lu (author), Qin, Z. (author), Dong, J. (author), Bauer, P. (author)In recent years, electrical vehicle (EV) starts showing its unique advantages that the conventional combustion vehicles do not have. Together with the increasing interests on EV, the motor drive with higher efficiency and lighter weight also becomes more attractive. A promising solution is to apply the wide band gap (WBG) components including...conference paper 2019
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Purgat, P. (author), van der Blij, N.H. (author), Qin, Z. (author), Bauer, P. (author)Scalable and robust low-voltage direct current (LVdc) distribution networks require solutions, allowing flexible power flow control and reliable short-circuit protection. In this paper, the continuous full-order large-and small-signal models of a partially rated power flow control converter (PFCC) are derived utilizing the generalized...journal article 2019
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Narayan, N.S. (author), Chamseddine, Ali (author), Vega Garita, V.E. (author), Qin, Z. (author), Popovic, J. (author), Bauer, P. (author), Zeman, M. (author)Off-grid solar home systems (SHSs) currently constitute a major source of providing basic electricity needs in un(der)-electrified regions of the world, with around 73 million households having benefited from off-grid solar solutions by 2017. However, in and of itself, state-of-the-art SHSs can only provide electricity access with adequate...journal article 2019
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Narayan, N.S. (author), Chamseddine, Ali (author), Vega Garita, V.E. (author), Qin, Z. (author), Popovic, J. (author), Bauer, P. (author), Zeman, M. (author)With almost 1.1 billion people lacking access to electricity, solar-based off-grid products like Solar Home Systems (SHS) have become a promising solution to provide basic electricity needs in un(der)-electrified regions. Therefore, optimal system sizing is a vital task as both oversizing and undersizing a system can be detrimental to system...journal article 2019
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Output Impedance Modelling and Sensitivity Study of Grid-Feeding Inverters with Dual Current ControlBeloqui Larumbe, L. (author), Qin, Z. (author), Bauer, P. (author)In this paper, the output impedance of a three-phase inverter based on a dual current control (also called double synchronous reference frame current control) is modelled, which includes: the current loop gain, the control delay, and the Phase-<br/>Locked Loop (PLL). The impact of these parameters on the impedance is then analysed by a...conference paper 2019
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Bandyopadhyay, S. (author), Dong, J. (author), Qin, Z. (author), Bauer, P. (author)Inductive power transfer (IPT) is becoming increasingly popular in stationary electric vehicle charging systems. In this paper, the influence of the different IPT coupler geometries on the performance factors efficiency, power density, misalignment tolerance, and stray field is studied. Five different cou-pler topologies namely the circular,...conference paper 2019
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Purgat, P. (author), Bandyopadhyay, S. (author), Qin, Z. (author), Bauer, P. (author)Triple active bridge (TAB) as an isolated multiport converter is a promising integrated energy system for smart grids or electric vehicles. This article aims to derive and analyze zero voltage switching (ZVS) regions of TAB, in which both switching losses are reduced, and electromagnetic interference issues are mitigated. In the proposed...journal article 2020
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Qin, Z. (author), Shen, Zhan (author), Blaabjerg, Frede (author), Bauer, P. (author)In dual active bridge (DAB) converters, there can be transformer current ringing, especially when the transformer turns ratio is high. It is induced by high dv/dt generated by fast switching as well as the low impedance of the magnetic tank at the high-frequency range. To quantify the influence of the magnetic tank, its impedance model is...journal article 2020
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Bandyopadhyay, S. (author), Qin, Z. (author), Bauer, P. (author)Multiactive bridge (MAB) converter is a promising solution for integrating multiple renewable sources, storage, and loads for various applications. However, the MAB converter is challenging to control due to the inherent coupling between the port power flows. To that end, this article presents a decoupling control strategy based on linear...journal article 2020
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Vree, D. (author), Beloqui Larumbe, L. (author), Qin, Z. (author), Bauer, P. (author), Ummels, B.C. (author)In this decade, a significant amount of additional wind and solar power will be integrated in the Dutch high voltage grid. The 383 MW nearshore Wind Park Fryslân is foressen to be connected to the Dutch 110kV grid in 2020 through two 55km cable circuits. To quantify the risks of exceeding emission levels for both the TSO and the wind farm...conference paper 2020
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Narayan, N.S. (author), Vega Garita, V.E. (author), Qin, Z. (author), Popovic-Gerber, Jelena (author), Bauer, P. (author), Zeman, M. (author)Nearly 840 million people still lack access to electricity, while over a billion more have an unreliable electricity connection. In this article, the three different electrification pathways-grid extension, centralized microgrids, and standalone solar-based solutions, such as pico-solar and solar home systems (SHS)-are critically examined...journal article 2020
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Purgat, P. (author), Bandyopadhyay, S. (author), Qin, Z. (author), Bauer, P. (author)This paper proposes a power flows decoupling controller for the triple active bridge converter. The controller is based on a full-order continuous-time model of the TAB converter derived using the generalized average modelling (GAM) technique. GAM uses the Fourier series expansion to decompose the state-space variables into two components,...conference paper 2020
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Beloqui Larumbe, L. (author), Qin, Z. (author), Bauer, P. (author)A voltage imbalance at the AC terminals of a three-phase inverter creates a ripple in the power signal on the DC side. In order to minimize this ripple, several techniques can be applied, in which a double Synchronous Reference Frame (SRF) current control structure is very typical. In this approach, both the positive and negative sequence...conference paper 2020
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Purgat, P. (author), Shah, Samad (author), van der Blij, N.H. (author), Qin, Z. (author), Bauer, P. (author)Solid-state circuit breakers (SSCB) show great promise to become the key element in the protection of low-voltage direct current microgrids. SSCBs operate in the microsecond range and employ semi-conductor devices that have strict safe operation area limits. Therefore, the design of the SSCB needs to consider the effects of fault detection...journal article 2021