Grid-connected PV system: Introduction to behavior matching

Casaro, Marcio Mendes; Martins, Denizar Cruz

doi:10.1109/pesc.2008.4592052

Cited by 12 publications

(7 citation statements)

References 10 publications

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“…ese variables should not vary. at de�ciency can be neglected thanks to the Behavior Matching [44,45,51,52,74].…”

Section: Dc-dc Stagementioning

confidence: 99%

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Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

Martins

2013

ISRN Renewable Energy

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is paper presents a grid-connected PV system in a centralized con�guration constructed through a three-phase dual-stage inverter. For the DC-DC stage the three-phase series resonant converter is chosen thanks to the advantages that it exhibits. However, it is inadequate for the accomplishment of MPPT, due to its efficiency strongly depending on the implemented deadtime and switching frequency. en, this paper proposes a conceptual modi�cation, that is, a modi�ed dual-stage inverter in which the inverter stage is responsible for both the MPPT and the grid-current control. In addition, the DC-DC converter operates with constant duty cycle and frequency. Such con�guration requires a new concept, introduced as Behavior Matching. It serves as a fundamental feature for the DC-DC converter to reproduce the PV array I-V characteristic when they are connected, without control action. e maximum power operating point is found by maximizing the direct axis current, obtained by Park's transformation from the inverter, through the perturbation and observation algorithm. Any speci�c measurement to realize the MPPT is needed. e galvanic isolation is achieved by using a high-frequency transformer. e structure is appropriate for high power applications, above 10 kW.

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“…ese variables should not vary. at de�ciency can be neglected thanks to the Behavior Matching [44,45,51,52,74].…”

Section: Dc-dc Stagementioning

confidence: 99%

“…en, behavior matching serves as a fundamental feature for DC-DC converters to reproduce the PV array I-V characteristic without control action. e studies in [43][44][45] indicate this possibility.…”

Section: Introductionmentioning

confidence: 96%

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

Martins

2013

ISRN Renewable Energy

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“…The resonant part of the PR controller can be viewed as a generalized integrator (GI). The transfer functions of the GI and the complete PR controller are given by 2 2…”

Section: A Implementation Of Proposed Controlmentioning

confidence: 99%

“…There are many power converter topologies for PV systems such as two-stages [2] [3] or single-stage [3][4], and with transformer or transformerless [5]. However all these topologies require an inverter to connect them to the grid and several requirements must be met to perform this connection.…”

Section: Introductionmentioning

confidence: 99%

New control strategy to allow the photovoltaic systems operation under grid faults

Azevedo

Rodriguez

Cavalcanti

et al. 2009

2009 Brazilian Power Electronics Conference

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-This paper presents a new control strategy that allows the photovoltaic system operation under grid faults without overcurrent and assuring grid sinusoidal currents. The current limiter is made indirectly by using an active power limiter that is calculated dynamically based on the grid positive-sequence voltage. The paper also shows that the classic control strategies used in the PV systems cause harmonic current injections on the electrical grid and dangerous overcurrents when voltage sags occur. The strategy presented here overcomes these drawbacks and allows the inverter operation under any unbalanced condition. The control is made on stationary reference frame using Proportional-Resonant current control. This new control strategy is compared to the classic strategy through simulations in PSCAD/EMTDC and the experimental results prove its effectiveness.

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“…From 2000 to now, many works referring grid-connected systems were published [8][9][10][11], relating aspects as power converters design, control strategies, PV and WT maximum power point tracker (MPPT), reactive compensation, active filtering and so on. In addition, important institutions as IEEE and lAS have developed standards and recommendations to guide the designers.…”

Section: Introductionmentioning

confidence: 99%

Grid-connected PV-wind-fuel cell hybrid system employing a supercapacitor bank as storage device to supply a critical DC load

Coelho

Schimtz

Martins

2011

2011 IEEE 33rd International Telecommunications Energy Conference (INTELEC)

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in this work a grid-connected renewable energy system composed by a 1kW photovoltaic (PV) array and a 1 kW wind turbine (WT) is presented. The generated power from each renewable source is processed by independent dc-dc converters and provided to a common dc bus. Once baUeries employment is not desired, a 1.2 kW fuel cell (FC) and a supercapacitor bank (SCB) are used as backup, in order to keep a dc critical load continuously supplied. The SCB operates as a short term storage device and its use also ensure the 120 Hz voltage ripple attenuation. From proper process, the dc bus power is delivered to the main grid with high power factor. This paper presents all theoretical analysis referring the proposed system, including the MPPT strategies for PV and WT generators and the control strategies for the system operation on grid-connected and stand alone modes. A complete power flow study is also presented, considering several combinations of power generation and load demand. Simulation results, obtained by the use of PSIM software, are accomplished in order to validate the system operation.

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Grid-connected PV system: Introduction to behavior matching

Cited by 12 publications

References 10 publications

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

New control strategy to allow the photovoltaic systems operation under grid faults

Grid-connected PV-wind-fuel cell hybrid system employing a supercapacitor bank as storage device to supply a critical DC load

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