The Experts below are selected from a list of 3735 Experts worldwide ranked by ideXlab platform

D Sutanto - One of the best experts on this subject based on the ideXlab platform.

  • Time Series Variations of the Neutral-to-Ground Potential in a 4-Wire LV Network under Unbalanced Allocation of Rooftop Solar PV and Mitigation using Energy Storage
    2019 IEEE Power & Energy Society General Meeting (PESGM), 2019
    Co-Authors: Obaidur Rahman, Kashem M Muttaqi, D Sutanto
    Abstract:

    Recently, there have been a significant increase in the number of single-phase rooftop solar photovoltaic systems in the low voltage (LV) distribution networks (DNs). High integration of solar PV units in future grids has the potential of imposing some adverse effects on the distribution networks. Detailed analysis of the future distribution networks is necessary for future distribution network planning and operation. In the traditional three phase network analysis, the Neutral Wire in the 4-Wire LV is often ignored or merged into the phase admittances. However if the effect of the Neutral Wire is not addressed, the use of the traditional three phase analysis of a 4-Wire system may not accurately reflect the actual operation on the power systems. A high Neutral current due to the unbalance operation of the power system may overload the Neutral conductor, interfere with communication infrastructure, reduce the sensitivity of fault relays and increase the Neutral to ground voltage. This paper aims to investigate the variation of the Neutral to ground voltage in a multi-grounded DN with varying load and PV production in a 24 hour period. A mitigation strategy using distributed energy sources is also provided to demonstrate the benefit of the distributed storage in the LV networks. A study using the time series power flow has been performed on an Australian Distribution Network and the results have been reported in this paper.

  • a three phase power flow approach for integrated 3 Wire mv and 4 Wire multigrounded lv networks with rooftop solar pv
    IEEE Transactions on Power Systems, 2013
    Co-Authors: M J E Alam, Kashem M Muttaqi, D Sutanto
    Abstract:

    With increasing level of rooftop solar photovoltaic (PV) penetration into low voltage (LV) distribution networks, analysis with realistic network models is necessary for adequate capturing of network behavior. Traditional three-phase 3-Wire power flow approach lacks the capability of exact analysis of 4-Wire multigrounded LV networks due to the approximation of merging the Neutral Wire admittance into the phase Wire admittances. Such an approximation may not be desirable when Neutral Wire and grounding effects need to be assessed, especially in the presence of single-phase solar power injection that may cause a significant level of network unbalance. This paper proposes a three-phase power flow approach for distribution networks while preserving the original 3-Wire and 4-Wire configurations for more accurate estimation of rooftop PV impacts on different phases and Neutrals. A three-phase transformer model is developed to interface between the 3-Wire medium voltage (MV) and the 4-Wire LV networks. Also an integrated network model is developed for an explicit representation of different phases, Neutral Wires and groundings of a distribution system. A series of power flow calculations have been performed using the proposed approach to investigate the impacts of single-phase variable PV generation on an Australian distribution system and results are presented.

Mohamed Fouad Benkhoris - One of the best experts on this subject based on the ideXlab platform.

  • A new balancing three level three dimensional space vector modulation strategy for three level Neutral point clamped four leg inverter based shunt active power filter controlling by nonlinear back stepping controllers
    ISA Transactions, 2016
    Co-Authors: Ali Chebabhi, Mohammed Karim Fellah, Abdelhalim Kessal, Mohamed Fouad Benkhoris
    Abstract:

    In this paper is proposed a new balancing three-level three dimensional space vector modulation (B3L-3DSVM) strategy which uses a redundant voltage vectors to realize precise control and high-performance for a three phase three-level four-leg Neutral point clamped (NPC) inverter based Shunt Active Power Filter (SAPF) for eliminate the source currents harmonics, reduce the magnitude of Neutral Wire current (eliminate the zero-sequence current produced by single-phase nonlinear loads), and to compensate the reactive power in the three-phase four-Wire electrical networks. This strategy is proposed in order to gate switching pulses generation, dc bus voltage capacitors balancing (conserve equal voltage of the two dc bus capacitors), and to switching frequency reduced and fixed of inverter switches in same times. A Nonlinear Back Stepping Controllers (NBSC) are used for regulated the dc bus voltage capacitors and the SAPF injected currents to robustness, stabilizing the system and to improve the response and to eliminate the overshoot and undershoot of traditional PI (Proportional-Integral). Conventional three-level three dimensional space vector modulation (C3L-3DSVM) and B3L-3DSVM are calculated and compared in terms of error between the two dc bus voltage capacitors, SAPF output voltages and THDv, THDi of source currents, magnitude of source Neutral Wire current, and the reactive power compensation under unbalanced single phase nonlinear loads. The success, robustness, and the effectiveness of the proposed control strategies are demonstrated through simulation using Sim Power Systems and S-Function of MATLAB/SIMULINK.

Kashem M Muttaqi - One of the best experts on this subject based on the ideXlab platform.

  • Time Series Variations of the Neutral-to-Ground Potential in a 4-Wire LV Network under Unbalanced Allocation of Rooftop Solar PV and Mitigation using Energy Storage
    2019 IEEE Power & Energy Society General Meeting (PESGM), 2019
    Co-Authors: Obaidur Rahman, Kashem M Muttaqi, D Sutanto
    Abstract:

    Recently, there have been a significant increase in the number of single-phase rooftop solar photovoltaic systems in the low voltage (LV) distribution networks (DNs). High integration of solar PV units in future grids has the potential of imposing some adverse effects on the distribution networks. Detailed analysis of the future distribution networks is necessary for future distribution network planning and operation. In the traditional three phase network analysis, the Neutral Wire in the 4-Wire LV is often ignored or merged into the phase admittances. However if the effect of the Neutral Wire is not addressed, the use of the traditional three phase analysis of a 4-Wire system may not accurately reflect the actual operation on the power systems. A high Neutral current due to the unbalance operation of the power system may overload the Neutral conductor, interfere with communication infrastructure, reduce the sensitivity of fault relays and increase the Neutral to ground voltage. This paper aims to investigate the variation of the Neutral to ground voltage in a multi-grounded DN with varying load and PV production in a 24 hour period. A mitigation strategy using distributed energy sources is also provided to demonstrate the benefit of the distributed storage in the LV networks. A study using the time series power flow has been performed on an Australian Distribution Network and the results have been reported in this paper.

  • a three phase power flow approach for integrated 3 Wire mv and 4 Wire multigrounded lv networks with rooftop solar pv
    IEEE Transactions on Power Systems, 2013
    Co-Authors: M J E Alam, Kashem M Muttaqi, D Sutanto
    Abstract:

    With increasing level of rooftop solar photovoltaic (PV) penetration into low voltage (LV) distribution networks, analysis with realistic network models is necessary for adequate capturing of network behavior. Traditional three-phase 3-Wire power flow approach lacks the capability of exact analysis of 4-Wire multigrounded LV networks due to the approximation of merging the Neutral Wire admittance into the phase Wire admittances. Such an approximation may not be desirable when Neutral Wire and grounding effects need to be assessed, especially in the presence of single-phase solar power injection that may cause a significant level of network unbalance. This paper proposes a three-phase power flow approach for distribution networks while preserving the original 3-Wire and 4-Wire configurations for more accurate estimation of rooftop PV impacts on different phases and Neutrals. A three-phase transformer model is developed to interface between the 3-Wire medium voltage (MV) and the 4-Wire LV networks. Also an integrated network model is developed for an explicit representation of different phases, Neutral Wires and groundings of a distribution system. A series of power flow calculations have been performed using the proposed approach to investigate the impacts of single-phase variable PV generation on an Australian distribution system and results are presented.

M J E Alam - One of the best experts on this subject based on the ideXlab platform.

  • a three phase power flow approach for integrated 3 Wire mv and 4 Wire multigrounded lv networks with rooftop solar pv
    IEEE Transactions on Power Systems, 2013
    Co-Authors: M J E Alam, Kashem M Muttaqi, D Sutanto
    Abstract:

    With increasing level of rooftop solar photovoltaic (PV) penetration into low voltage (LV) distribution networks, analysis with realistic network models is necessary for adequate capturing of network behavior. Traditional three-phase 3-Wire power flow approach lacks the capability of exact analysis of 4-Wire multigrounded LV networks due to the approximation of merging the Neutral Wire admittance into the phase Wire admittances. Such an approximation may not be desirable when Neutral Wire and grounding effects need to be assessed, especially in the presence of single-phase solar power injection that may cause a significant level of network unbalance. This paper proposes a three-phase power flow approach for distribution networks while preserving the original 3-Wire and 4-Wire configurations for more accurate estimation of rooftop PV impacts on different phases and Neutrals. A three-phase transformer model is developed to interface between the 3-Wire medium voltage (MV) and the 4-Wire LV networks. Also an integrated network model is developed for an explicit representation of different phases, Neutral Wires and groundings of a distribution system. A series of power flow calculations have been performed using the proposed approach to investigate the impacts of single-phase variable PV generation on an Australian distribution system and results are presented.

Luis F. Ochoa - One of the best experts on this subject based on the ideXlab platform.

  • Fault analysis in four-Wire distribution networks
    IEE Proceedings - Generation Transmission and Distribution, 2005
    Co-Authors: R.m. Ciric, Luis F. Ochoa, A.. Padilla-feltrin, Hassan Nouri
    Abstract:

    The Neutral Wire in most existing power flow and fault analysis software is usually merged into phase Wires using Kron's reduction method. In some applications, such as fault analysis, fault location, power quality studies, safety analysis, loss analysis etc., knowledge of the Neutral Wire and ground currents and voltages could be of particular interest. A general short-circuit analysis algorithm for three-phase four-Wire distribution networks, based on the hybrid compensation method, is presented. In this novel use of the technique, the Neutral Wire and assumed ground conductor are explicitly represented. A generalised fault analysis method is applied to the distribution network for conditions with and without embedded generation. Results obtained from several case studies on medium- and low-voltage test networks with unbalanced loads, for isolated and multi-grounded Neutral scenarios, are presented and discussed. Simulation results show the effects of Neutrals and system grounding on the operation of the distribution feeders.

  • EVALUATION OF DISTRIBUTION SYSTEM LOSSES DUE TO LOAD UNBALANCE
    2005
    Co-Authors: Luis F. Ochoa, R.m. Ciric, Antonio Padilha-feltrin, Gareth Harrison
    Abstract:

    Distribution network losses can vary signifi- cantly depending on the load unbalance. Here, an analysis of distribution system losses is presented that considers load unbalance and the effect of explicitly represented Neutral Wire. A general power flow algorithm for three- phase four-Wire radial distribution networks, based on the current summation backward-forward technique is ap- plied. Loss analysis results obtained from three-phase four-Wire medium and low voltage test feeders with unbal- anced load scenarios are presented and discussed consider- ing: a) original phase and Neutral Wires resistances; and b) resistances obtained by performing Kron's reduction.

  • Investigating effects of Neutral Wire and grounding in distribution systems with faults
    2004
    Co-Authors: R.m. Ciric, A. Padilha, Luis F. Ochoa
    Abstract:

    In some applications, like fault analysis, fault location, power quality studies, safety analysis, loss analysis, etc., knowing the Neutral Wire and ground currents and voltages could be of particular interest. In order to investigate the effects of Neutrals and system grounding on the operation of distribution feeders with faults, a hybrid short circuit algorithm is generalized. In this novel use of the technique, the Neutral Wire and assumed ground conductor are explicitly represented. Results obtained from several case studies using the IEEE 34-node test network are presented and discussed.

  • power flow in four Wire distribution networks general approach
    IEEE Transactions on Power Systems, 2003
    Co-Authors: R.m. Ciric, A P Feltrin, Luis F. Ochoa
    Abstract:

    The Neutral Wire in most power flow software is usually merged into phase Wires using Kron's reduction. Since the Neutral Wire and the ground are not explicitly represented, Neutral Wire and ground currents and voltages remain unknown. In some applications, like power quality and safety analyses, loss analysis, etc., knowing the Neutral Wire and ground currents and voltages could be of special interest. In this paper, a general power flow algorithm for three-phase four-Wire radial distribution networks, considering Neutral grounding, based on backward-forward technique, is proposed. In this novel use of the technique, both the Neutral Wire and ground are explicitly represented. A problem of three-phase distribution system with earth return, as a special case of a four-Wire network, is also elucidated. Results obtained from several case studies using medium- and low-voltage test feeders with unbalanced load, are presented and discussed.

  • Power flow in four-Wire distribution networks - general approach
    IEEE Power Engineering Society General Meeting 2004., 1
    Co-Authors: R.m. Ciric, A. Padilha, Luis F. Ochoa
    Abstract:

    Summary form only given. The Neutral Wire in most power flow software is usually merged into phase Wires using Kron's reduction. Since the Neutral Wire and the ground are not explicitly represented, Neutral Wire and ground currents and voltages remain unknown. In some applications, like power quality and safety analyses, loss analysis, etc., knowing the Neutral Wire and ground currents and voltages could be of special interest. In this paper, a general power flow algorithm for three-phase four-Wire radial distribution networks, considering Neutral grounding, based on backward-forward technique, is proposed. In this novel use of the technique, both the Neutral Wire and ground are explicitly represented. A problem of three-phase distribution system with earth return, as a special case of a four-Wire network, is also elucidated. Results obtained from several case studies using medium and low voltage test feeders with unbalanced load, are presented and discussed.