PV Based Distributed Generation with Compensation Feature Under Unbalanced and Non-linear Load Conditions for a 3-&amp;#x003D5;, 4 Wire System

Patel, Himanshu; Agarwal, Vivek

doi:10.1109/icit.2006.372369

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…Another approach is applied in [12], where the inverter has a resistive behaviour towards the zero-sequence and negative-sequence component of the node voltage. Most of the work described in literature is focused on the control schemes of inverters capable of providing negative-and zero-sequence currents [13]- [15]. This work is focussed on the effect that optimally controlling these balancing inverters has on the network.…”

Section: Introductionmentioning

confidence: 99%

Load Balancing With EV Chargers and PV Inverters in Unbalanced Distribution Grids

Weckx

Driesen

2015

IEEE Trans. Sustain. Energy

196

117

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Balanced three-phase four-wire distribution grids can host significantly more distributed generation and electric vehicles. Three-phase PV inverters and EV chargers can be adapted to transfer power from highly loaded to less loaded phases, without overloading the inverter or charger. Grid conditions will be improved due to a more balanced operation of the network and more PV panels and EVs can be connected before the limits of the network are reached. A classic coordinated charging strategy for EVs is adapted in this paper. It is shown that the charging of EVs can be improved when power can be transferred from one phase to another. By using PV inverters with a balancing inverter the power injected in each phase will become a controllable variable, as the total amount of produced power does not necessarily need to be equally divided across the three phases. The improvements made by using EV chargers and PV inverters that can balance the network are investigated. Several load flow simulations with realistic data show a positive effect on the system losses, the grid voltage and voltage unbalance. Finally a local controller is proposed to control the balancing between the phases when a real-time communication channel is not available.

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Section: Introductionmentioning

confidence: 99%

Load Balancing With EV Chargers and PV Inverters in Unbalanced Distribution Grids

Weckx

Driesen

2015

IEEE Trans. Sustain. Energy

196

117

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“…6(a) shows the circuit schematic of a boost-type dc-dc power converter whose duty cycle is modulated as per the algorithm used for electrical tracking of the MPP. In a conventional controller working with the P&O method, duty cycle (D * ) is generated as follows [22]:…”

Section: Duty Cycle Computation For Dc-dcmentioning

confidence: 99%

Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions

Patel¹,

Agarwal

2008

IEEE Trans. Ind. Electron.

925

408

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Abstract-Current-voltage and power-voltage characteristics of large photovoltaic (PV) arrays under partially shaded conditions are characterized by multiple steps and peaks. This makes the tracking of the actual maximum power point (MPP) [global peak (GP)] a difficult task. In addition, most of the existing schemes are unable to extract maximum power from the PV array under these conditions. This paper proposes a novel algorithm to track the global power peak under partially shaded conditions. The formulation of the algorithm is based on several critical observations made out of an extensive study of the PV characteristics and the behavior of the global and local peaks under partially shaded conditions. The proposed algorithm works in conjunction with a dc-dc converter to track the GP. In order to accelerate the tracking speed, a feedforward control scheme for operating the dc-dc converter is also proposed, which uses the reference voltage information from the tracking algorithm to shift the operation toward the MPP. The tracking time with this controller is about one-tenth as compared to a conventional controller. All the observations and conclusions, including simulation and experimental results, are presented.Index Terms-Global peak (GP), maximum power point tracking (MPPT), partial shading, power-voltage (P -V ) characteristics.

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“…Besides, it is the interface between the variable DC generator and the power grid. The inverter involves three major tasks; Inject sinusoidal current into the power grid; provide compensation against harmonic and reactive power; and finally the inverter must ensure maximum power tracking (MPPT) Kjaer et al (2005), Patel & Agarwal (2006). A dual-stage inverter have been selected for the GCPVS like the shown in figure 5, it offers an additional degree of freedom in the operation of the system than the one-stage configuration Xue et al (2004), Kjaer et al (2005).…”

Section: Invertermentioning

confidence: 99%

Fuzzy Maximum Power Point Tracking Techniques Applied to a Grid-Connected Photovoltaic System

Diaz¹,

Hernández²,

Duarte³

2011

Fuzzy Controllers, Theory and Applications

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PV Based Distributed Generation with Compensation Feature Under Unbalanced and Non-linear Load Conditions for a 3-ϕ, 4 Wire System

Cited by 10 publications

References 11 publications

Load Balancing With EV Chargers and PV Inverters in Unbalanced Distribution Grids

Load Balancing With EV Chargers and PV Inverters in Unbalanced Distribution Grids

Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions

Fuzzy Maximum Power Point Tracking Techniques Applied to a Grid-Connected Photovoltaic System

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