Power quality improvement based on shunt active power filter connected to a photovoltaic array

Belaidi, Rachid; Fathi, Mohamed; Larafi, Mohamed Mghezzi; Kaci, Gunia Mohand; Haddouche, Ali

doi:10.1109/irsec.2015.7455103

Cited by 9 publications

(11 citation statements)

References 16 publications

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“…2 shows the main blocks of the control diagram used to regulate the VSC operation. While this paper only provides an overview of the typical control system configuration, more details can be found in [11]- [13]:…”

Section: A Res Configuration and Control Systemmentioning

confidence: 99%

Time-Domain Modeling of a Distribution System to Predict Harmonic Interaction Between PV Converters

Todeschini

Balasubramaniam

Igić

2019

IEEE Trans. Sustain. Energy

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Due to the interaction converter control, pre-existing distortion and grid impedance, the harmonic levels caused by renewable energy sources are continuously changing, and their assessment requires the use of dedicated computer models. Several time-domain models have been proposed to carry out this analysis, however, they fall short of at least one requirement: either they do not provide accurate results, or they require an excessively long simulation time. This paper presents a novel time-domain model to address the gap described above: the proposed model employs average functions and a novel switching emulator. Therefore, it is referred to as "average model with switching emulator" (AMSE). The proposed model is compared with existing models, and the results indicate that the AMSE meet both requirements stated above, as it accurately represents harmonic distortion while reducing significantly the simulation time. The second part of the paper discusses mitigating solutions to harmonic amplification in systems with a high penetration of VSCs, and shows the effectiveness of using an active filter to reduce harmonic levels in system experiencing resonance conditions.

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Section: A Res Configuration and Control Systemmentioning

confidence: 99%

Time-Domain Modeling of a Distribution System to Predict Harmonic Interaction Between PV Converters

Todeschini

Balasubramaniam

Igić

2019

IEEE Trans. Sustain. Energy

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“…The fundamental current control is based on the use of algorithms which are standard for PV inverters operation. Therefore, only aconceptual overview is provided in this paper, while more details can be found in [12]- [14]:…”

Section: A Fundamental Current Control(blue Path)mentioning

confidence: 99%

“…-A Phase-Lock Loop (PLL) calculates the system angular frequency t from the voltage measurements. The angular frequency t is used as one of the inputs for the algorithm which performs the dq transformation [12]- [15]. The dq transformation is used to convert voltage and currents measurements into the dq domain [8].…”

Section: A Fundamental Current Control(blue Path)mentioning

confidence: 99%

“…-A MPPT algorithm (based on the 'perturb and observe' approach) is included to capture the maximum power based on the radiation level [12]. The output of the MPPT algorithm is the voltage vdc_ref.…”

Section: A Fundamental Current Control(blue Path)mentioning

confidence: 99%

“…More recently, there has been a renewed interest in the use of AFs, given that this feature can be provided as 'ancillary service', and the harmonic current levels in the power system have been increasing [10], [11]. The use of PV inverters as AFs is described in several publications, including [12]- [14]. The majority of algorithms proposed to achieve AF operation do not address the following concern: when harmonic currents are generated in addition to the fundamental component, there is a risk of exceeding the current rating of the power electronic switches.…”

Section: Introductionmentioning

confidence: 99%

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Control and derating of a PV inverter for harmonic compensation in a smart distribution system

Todeschini

2017

2017 IEEE Power &Amp; Energy Society General Meeting

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Due to the high number of photovoltaic (PV) inverters installed, in some regions of the UK the power generated under peak conditions exceeds the transmission system capacity limits. With the aim to mitigate this condition and operate the grid within its design limits, utilities curtail PV output power, thus causing financial loss for the PV system owners and limiting the use of the installed components. The control system proposed in this paper allows using the PV inverter as an Active Filter (AF), when the output power is curtailed, thus improving the system power quality and exploiting the installed MVA. A novel contribution is the description of a harmonic derating coefficient which limits harmonic current injection based on the fundamental current generated by the inverter. The proposed application fits within the scope of the smart grid, where multi-functional inverters can be controlled by utilities to improve grid operating conditions.

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Provision of ancillary services in a grid‐connected photovoltaic distributed energy resource

Rocha

Salvadori

Hartmann

et al. 2021

IET Generation Trans & Dist

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The constant growth of distributed energy resource (DER) in the electric power system (EPS) is a reality on account of some aspects, for example, technical, financial, environmental. The insertion of DERs can be positive, providing ancillary services, for example, harmonic mitigation, or negative, causing overvoltage, depending on the proper control and the characteristics of the grid. This paper proposes a pq-based control strategy for distributed generation, wherein the studied system is composed by a photovoltaic DER and a three-phase converter for processing the generated power and providing ancillary services (ASs) to a three-wire EPS. The power control is based on the power balance between the grid and the converter. Besides supplying active and reactive power, the proposed strategy can provide ASs by controlling the grid currents from a pq transformation. Some advantages over other solution can be mentioned, such as reduced sensor number and instantaneous control response. In addition, neither additional harmonic-extraction method nor a phase-locked loop is required. To validate this study and theoretical considerations, simulation results are presented and evaluated. From tests in a downscaled laboratory setup, experimental results are also presented to verify the effectiveness of the proposed control strategy.

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Power quality improvement based on shunt active power filter connected to a photovoltaic array

Cited by 9 publications

References 16 publications

Time-Domain Modeling of a Distribution System to Predict Harmonic Interaction Between PV Converters

Time-Domain Modeling of a Distribution System to Predict Harmonic Interaction Between PV Converters

Control and derating of a PV inverter for harmonic compensation in a smart distribution system

Provision of ancillary services in a grid‐connected photovoltaic distributed energy resource

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