Provision of ancillary service in a grid-connected photovoltaic power system

Rocha, Jessica P. M.; Salvadori, Fabiano; Gehrke, Camila S.

doi:10.1109/apec.2018.8341345

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…Several papers have been published on DER and AS application in recent years [2][3][4][5][6][7][8][9][10][11][12][13], with different methods for power generation and harmonic detection [1]. Generally, the generated power control can be based on dc-link regulation along with the maximum power point tracking or with load power, while the harmonic detection can be performed from load currents, grid currents or estimated by PCC voltages.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that method presented in [10] requires measuring the grid currents to extract the harmonics, but also both the converter currents and PCC voltages need to be measured for controlling the generated power; thus, no sensor count has been reduced. Likewise, Trinh and Lee [11] and Rocha et al [12] had proposed harmonic and reactive-power compensation, besides controlling the active-power injection, for AS provisioning. On the other hand, when compared to [10], only the grid currents and PCC voltages in the dq reference frame were used for achieving the compensation.…”

Section: Introductionmentioning

confidence: 99%

“…FIGURE12 Experimental results from scenario #3, considering the dc-link voltage (v dc ), PV current (i pv ), grid current (i g1 ) and converter current (i c1 )…”

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confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

Self Cite

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“…The fast development of Photovoltaic (PV) cell technologies, the continuous cost reduction of PV modules, and the constant upgrades in the power electronics technologies have been the main driving forces for the intensive deployment of PV power generation plants [1]. The presence of a Voltage Source Inverter (VSI) as interface between the PV modules and the AC bus in a PV farm makes possible, beside the fundamental active current injection, also several ancillary services [2]. Active filtering has gained particular attention because of the more and more stringent regulations regarding the voltage harmonics in the Point of Common Coupling (PCC), as described in the standard IEEE 519-2014 [3].…”

Section: Introductionmentioning

confidence: 99%

Integration and Optimization of Voltage Active Filtering Functionality in a PV Park

Cecati

Pugliese

Zhu

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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The stringent regulations on the power quality declared in the standard IEEE 519-2014 push the companies and the power producers to install active filters to compensate the voltage harmonics distortion in the Point of Common Coupling (PCC). However, in the case of a Photovoltaic (PV) park, the cost for an additional active filter converter can be saved by using the PV converters themselves as active filter. This solution is very attractive, but reserves several challenges. In fact, the harmonic current injection by the PV converter can bring a ripple in the DC link which increases the stress on the converter components and effects the MPPT. Moreover, the limit on the nominal current for the PV converters must be taken into consideration. In this paper a centralized optimized strategy to share the harmonic current injection among all the converters in a PV park is investigated. The optimization is formulated as a Quadratic Programming (QP) problem: the active power consumed by the PV park for the active filtering and the DC link ripple of the PV converters caused by the harmonic currents injection are minimized. The limit on the maximum injectable harmonic current by each PV converter are respected.

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“…With these challenges posed, there is a need for a device, which can manage all these requirements at the end-user level. Several system topologies are proposed in literature, to handle power quality issues, shunt active filters along with series unit is proposed in [6], grid-tied PV converters with active filtering is proposed in [7], new power quality device which can act in LV distribution system and also at end-user is proposed in [8], while the analysis of a shunt storage system is given in [9]. Other proposals for distribution system are given in [10][11][12][13][14], however, they can manage one or two requirements, but not all the Power Quality issues.…”

Section: Introductionmentioning

confidence: 99%

Distributed Storage System with Solar Photovoltaic Energy Source

Akkala

Faranda

Sodini

et al. 2019

2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Syst

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The management of Renewable Energy Sources (RES) and storage systems in order to connect to an LV distribution network imposes several challenges for the end-user. In addition, the nonlinear nature of the power electronic interfaces and the end-user loads create Power Quality issues in LV distribution network. In this paper, a power electronic device is proposed as a solution to the end-user for the management of RES, storage and for the mitigation of the Power Quality. The device, named Distributed Storage system, is connected in parallel to the end-user and the network. It facilitates online and island mode of operations. The device can manage injection of power into the network, of a RES, such as a PV, charging and discharging of a storage system and mitigate the Power Quality issues of the enduser by acting as a shunt active filter. The system structure, design, and control strategies are dealt with in this paper along with the description of hardware prototype realized.

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Provision of ancillary service in a grid-connected photovoltaic power system

Cited by 4 publications

References 9 publications

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

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

Integration and Optimization of Voltage Active Filtering Functionality in a PV Park

Distributed Storage System with Solar Photovoltaic Energy Source

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