Voltage Quality Improvement in Low Voltage Distribution Networks Using Reactive Power Capability of Single-Phase PV Inverters

Zeraati, Mehdi; Golshan, Mohamad Esmail Hamedani; Guerrero, Josep M.

doi:10.1109/tsg.2018.2874381

Cited by 136 publications

(60 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, the authors of [9] propose a consensus-based distributed method that coordinates the single-phase PV inverters. It explores their local capability of processing reactive power, striving for voltage unbalance mitigation, as well as voltage regulation.…”

Section: A Literature Reviewmentioning

confidence: 99%

Optimal Multiobjective Control of Low-Voltage AC Microgrids: Power Flow Regulation and Compensation of Reactive Power and Unbalance

Brandão

Ferreira

Alonso

et al. 2020

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

The presence of single-phase distributed generators unevenly injecting active power in three-phase microgrids may create undesired upstream current unbalance. Consequently, voltage asymmetry and even active power curtailment may occur in such networks with negative economic impact. Thus, this paper proposes an optimal multiobjective approach to regulate the active and reactive power delivered by distributed generators driven by a three-layer hierarchical control technique in low-voltage microgrids. This method does not require previous knowledge of network parameters. The multiobjective algorithm is implemented in the secondary level achieving optimal dispatch in terms of maximizing the active power generation, as well as minimizing the reactive power circulation and current unbalance. By the existence of a utility interface three-phase converter placed at the point-ofcommon-coupling, the proposed control can regulate the power circulating among the microgrid phases, and the microgrid structure can withstand grid-connected and islanded operating modes. The path for interphase power circulation through the DClink of the utility interface allows the multiobjective algorithm to achieve better results in terms of generation and compensation compared to the system without utility interface. The proposed method is assessed herein by computational simulations in a threephase four-wire microgrid under realistic operational conditions.

show abstract

Section: A Literature Reviewmentioning

confidence: 99%

Optimal Multiobjective Control of Low-Voltage AC Microgrids: Power Flow Regulation and Compensation of Reactive Power and Unbalance

Brandão

Ferreira

Alonso

et al. 2020

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

show abstract

“…Also, let the elements of the (N + 1)-th order Y T and N -th order Y T follow the same subscript notation as that of (7) and (11). The elements of Y T and Y T are given by: where the admittances in (12) to (17) correspond to the respective impedance notations in 7and (11).…”

Section: B Analytical Computation Of Admittance Matrix Via Line Tranmentioning

confidence: 99%

“…In general, effects of power system imbalance are significantly more pronounced at the distribution level, where they may not be ignored without incurring in large modeling errors. Among the phenomena that contribute to imbalance in distribution systems, we emphasize: single and two-phase laterals [9], three-phase line asymmetry and lack of transposition [10], [11], and integration of distributed generation [12]. Furthermore, imbalance itself contributes to other power quality problems, such as harmonic distortion [13]- [15].…”

Section: Introductionmentioning

confidence: 99%

An Approach for Impedance Matrix Computation Considering Phase Transposition on Distribution Lines

Corrêa

Vieira

2020

IEEE Access

View full text Add to dashboard Cite

A renewed interest in phase frame analysis of distribution systems has surfaced in recent literature due to rapid expansion of grid-integrated distributed generation and non-linear loads, whose grid imbalance-increasing effects require more detailed analysis and modeling of distribution systems for their proper assessment. In this paper, under motivation of such recent usage of phase frame components, we propose analytical equations for N-phase neutral-equipped line admittance matrix under transposition assumption. By using the proposed equations, we evaluate precision losses caused by using the transposition assumption for modeling three-phase four-wire distribution lines. Moreover, differently from previous works, we validate the transposition assumption and the admittance matrix values obtained for various combinations of cable type and line geometry. A relevant reason for analyzing transposition assumption in more detail is the fact that it may be useful in distribution system computations, due to its advantageous decoupling of symmetrical components. In this sense, the present work provides additional discussion and illustrative evaluations of the line transposition assumption, which may be useful for analyzing its applicability under different circumstances.

show abstract

“…Alam et al [18] proposed a comprehensive reactive power optimization control strategy for PV inverters in unbalanced three-phase four-wire LVDNs. Zeraati et al [19] used the regulation of single-phase PV inverters with arbitrary connections between different phases to achieve reactive power compensation for unbalanced three-phase four-wire LVDNs. Although references [18,19] dealt with the reactive power optimization problem of three-phase four-wire LVDNs with PV integration, the uncertainties of the load power and the PV output were not considered.…”

Section: Introductionmentioning

confidence: 99%

“…Zeraati et al [19] used the regulation of single-phase PV inverters with arbitrary connections between different phases to achieve reactive power compensation for unbalanced three-phase four-wire LVDNs. Although references [18,19] dealt with the reactive power optimization problem of three-phase four-wire LVDNs with PV integration, the uncertainties of the load power and the PV output were not considered. Due to the unbalanced three-phase loads of users in LVDNs, the increasing penetration of a single-phase rooftop PV, and the power fluctuation of loads and distributed generations, the voltage quality problem in LVDNs are becoming more and more serious.…”

Section: Introductionmentioning

confidence: 99%

Robust Optimal Allocation of Decentralized Reactive Power Compensation in Three-Phase Four-Wire Low-Voltage Distribution Networks Considering the Uncertainty of Photovoltaic Generation

Lin

Zhang

et al. 2019

Energies

View full text Add to dashboard Cite

Due to the unbalanced three-phase loads, the single-phase distributed photovoltaic (PV) integration, the long feeders, and the heavy loads in a three-phase four-wire low voltage distribution network (LVDN), the voltage unbalance factor (VUF), the network loss and the voltage deviation are relatively high. Considering the uncertain fluctuation of the PV output and the load power, a robust optimal allocation of decentralized reactive power compensation (RPC) devices model for a three-phase four-wire LVDN is proposed. In this model, the uncertain variables are described as box uncertain sets, the three-phase simultaneous switching capacity and single-phase independent switching capacity of the RPC devices are taken as decision variables, and the objective is to minimize the total power loss of the LVDN under the extreme scenarios of uncertain variables. The bi-level optimization method is used to transform the robust optimization model with uncertain variables into bi-level deterministic optimization models, which could be solved alternately. The nonlinear programming solver IPOPT in the mature commercial software GAMS is adopted to solve the upper and lower deterministic optimization models to obtain a robust optimal allocation scheme of decentralized RPC devices. Finally, the simulation results for an actual LVDN show that the obtained decentralized RPC scheme can ensure that the voltage deviation and the VUF of each bus satisfied the secure operation requirement no matter how the PV output and load power changed within their own uncertain sets, and the network loss could be effectively reduced.

show abstract

Voltage Quality Improvement in Low Voltage Distribution Networks Using Reactive Power Capability of Single-Phase PV Inverters

Cited by 136 publications

References 22 publications

Optimal Multiobjective Control of Low-Voltage AC Microgrids: Power Flow Regulation and Compensation of Reactive Power and Unbalance

Optimal Multiobjective Control of Low-Voltage AC Microgrids: Power Flow Regulation and Compensation of Reactive Power and Unbalance

An Approach for Impedance Matrix Computation Considering Phase Transposition on Distribution Lines

Robust Optimal Allocation of Decentralized Reactive Power Compensation in Three-Phase Four-Wire Low-Voltage Distribution Networks Considering the Uncertainty of Photovoltaic Generation

Contact Info

Product

Resources

About