Active power filter integrated with distribution transformer based on magnetic potential balance

Cui, Guiping; Luo, Longfu; Li, Yong; Liang, Chonggan; Zhang, Xiaofeng; Xu, Jiazhu; Liu, Yuxing; Wang, Tao; Kubis, Andreas

doi:10.1049/iet-gtd.2018.6267

Cited by 6 publications

(5 citation statements)

References 25 publications

(38 reference statements)

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“…Therefore, the reactive power compensation must be limited according to the load power factor in order to avoid failures [45]. The same idea has been proposed applied to the secondary-side taps, providing active filtering [46].…”

Section: Self-supported Hybrid Transformersmentioning

confidence: 99%

“…The connection to the low-voltage grid allows for the use of low-voltage semiconductors [6]. Alternatively, this topology can be connected to the medium-voltage grid by means of the LFT ground-side taps in order to reduce the voltage connection level [46]. If the LFT taps are not available, it is possible to utilize the same topology, but connected to the medium-voltage grid by means of CTs [6,41], or by using medium voltage switches.…”

Section: Dc/ac Power Converter Topologiesmentioning

confidence: 99%

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Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

et al. 2021

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Distribution systems are under constant stress due to their highly variable operating conditions, which jeopardize distribution transformers and lines, degrading the end-user service. Due to transformer regulation, variable loads can generate voltage profiles out of the acceptable bands recommended by grid codes, affecting the quality of service. At the same time, nonlinear loads, such as diode bridge rectifiers without power factor correction systems, generate nonlinear currents that affect the distribution transformer operation, reducing its lifetime. Variable loads can be commonly found at domiciliary levels due to the random operation of home appliances, but recently also due to electric vehicle charging stations, where the distribution transformer can cyclically vary between no-load, rated and overrated load. Thus, the distribution transformer can not safely operate under highly-dynamic and stressful conditions, requiring the support of alternative systems. Among the existing solutions, hybrid transformers, which are composed of a conventional transformer and a power converter, are an interesting alternative to cope with several power quality problems. This article is a review of the available literature about hybrid distribution transformers.

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Section: Self-supported Hybrid Transformersmentioning

confidence: 99%

Section: Dc/ac Power Converter Topologiesmentioning

confidence: 99%

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

et al. 2021

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“…Besides, IDA-PBC gives excellent tracking of time-varying signals such as the current reference in case of non-linear loads [15]. PBC has been investigated extensively for the control of dcdc converters [16][17][18][19][20], rectifiers [21,22], single-phase inverters [23][24][25][26] and most recently for the control of three-phase inverters [15,[27][28][29][30][31][32], modular multilevel converter [33,34], active power filter [35], dual active bridge converter [36] and solid-state transformers [37]. Serra et al [27] have applied IDA-PBC design procedure for voltage control of stand-alone 3 ϕ inverter and have compared its performance with a PI-based controller.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, IDA–PBC gives excellent tracking of time‐varying signals such as the current reference in case of non‐linear loads [15]. PBC has been investigated extensively for the control of dc–dc converters [16–20], rectifiers [21, 22], single‐phase inverters [23–26] and most recently for the control of three‐phase inverters [15, 27–32], modular multilevel converter [33, 34], active power filter [35], dual active bridge converter [36] and solid‐state transformers [37].…”

Section: Introductionmentioning

confidence: 99%

Controller design, analysis and testing of a three‐phase VSI using IDA–PBC approach

Gupta

Chatterjee

Doolla

2020

IET Power Electronics

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A voltage-source inverter (VSI) is a key component of a distributed generation unit and an uninterruptible power supply. In this study, a three-phase VSI control using interconnection and damping assignment passivity-based control (IDA-PBC) approach has been revisited and analysed on aspects such as voltage gain, output impedance, transient response, stability and steady-state error. It is shown that in the case of accurately known filter parameters and perfectly zero initial conditions, theoretically, the voltage controller would exhibit unity voltage gain and zero output impedance. It is also shown that the IDA-PBC-based voltage controller exhibits a second-order response to a step input. This property has been utilised to propose a novel systematic procedure for tuning of the IDA-PBC gains based on the transient response specifications. The tuning method reveals that the gains for the outer voltage and inner current loops are related to each other and should not be separately tuned. The presented analysis and the proposed tuning method for controller gain have been tested through simulation studies. The concepts were further validated on a laboratory scale prototype of a three-phase VSI for balanced, unbalanced and non-linear loads.

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“…L g represents the impedance of the grid. The non-linear load is usually considered as a current source [27]. Space vector PWM (SVPWM) technology is used for carrier modulation.…”

Section: Introductionmentioning

confidence: 99%

Robust control method for LCL‐type shunt active power filter under weak grid condition

Wang

Pan

et al. 2020

IET Generation, Transmission & Distribution

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This study presents an improved double closed-loop current (fundamental and harmonics current) control method for inductive-capacitive-inductive (LCL) type shunt active power filter (SAPF), which is designed to enhance the robustness of the SAPF system to adapt weak grid application condition. Due to the variation of weak grid impedance, fundamental current control loop based on grid current feedback control method may become unstable, a robust parameters design method in discrete zdomain according to amplitude-frequency and phase-frequency characteristics is proposed to fit the grid impedance variation. The harmonics current of non-linear load exists in a wide frequency range, normal resonant controller will cause the system unstable due to the negative −180° cross of phase at high-frequency range, a digital phase-lead resonant controller (PL-RC) is proposed to extend the bandwidth of the harmonics current control, then the quantities of the PL-RCs used to suppress harmonics can be increased considerably compared with normal resonant controller. Experimental results are presented to verify the effectiveness of the robust parameters design method and the proposed PL-RC.

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Active power filter integrated with distribution transformer based on magnetic potential balance

Cited by 6 publications

References 25 publications

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Controller design, analysis and testing of a three‐phase VSI using IDA–PBC approach

Robust control method for LCL‐type shunt active power filter under weak grid condition

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