A Modified Backward/Forward Sweep Load Flow Method for Islanded Radial Microgrids

Hameed, Faisal; Hosani, Mohamed Al; Zeineldin, H. H.

doi:10.1109/tsg.2017.2754551

Cited by 107 publications

(118 citation statements)

References 32 publications

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“…This begins from the source node to the far end node means to compute the voltages at each bus while keeping the current acquired from previous iteration constant implying that the current acquired in the backward path will be constant amid the forward sweep. The determined voltages are compared with the predetermined voltage and if the error is inside tolerance limits, at that point the procedure is halted, also the line losses are figured out otherwise, the process is rehashed until criteria conditions are met [29,30].…”

Section: Forward Sweepmentioning

confidence: 99%

Augmentation of situational awareness by fault passage indicators in distribution network incorporating network reconfiguration

Jain¹,

Ghosh²,

Mohanta³

2019

Prot Control Mod Power Syst

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Power distribution systems are profoundly inclined to disturbances like untimely switching of breakers & relays, sympathetic tripping, and uncertainties regarding fault location. Thus, system stability and reliability are greatly affected. In this way, situational awareness and system integrity are the crucial factors in developing power system security, as it empowers successful decision making & timely reaction by the operators to any disturbance and also maintaining continuity of power supply. This paper focuses on the enhancement of situational awareness by fault location through fault passage indicators (FPI) to improve nominal impedance-based methods in distribution networks. Also, the proposed method is validated by comparing it with Intelligent Electronic Device (IED) based fault location method. Further, simultaneous reconfiguration of the system is incorporated to maintain the continuity of supply. The analysis has been tested on IEEE 33 bus distribution system.

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Section: Forward Sweepmentioning

confidence: 99%

Augmentation of situational awareness by fault passage indicators in distribution network incorporating network reconfiguration

Jain¹,

Ghosh²,

Mohanta³

2019

Prot Control Mod Power Syst

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“…The major bottlenecks for NM power flow include: 1) an islanded microgrid no longer has a swing bus; rather, both distributed energy resources (DERs) and loads follow droop characteristics, which has not been fully addressed by the state of the art methods [6], [7]. 2) NMs are designed to support plug-and-play of neighboring microgrids and achieve voltage restoration and power sharing through secondary control, which cannot be solved by existing centralized power flow analysis methods [8].…”

Section: Introductionmentioning

confidence: 99%

Compositional Power Flow for Networked Microgrids

Zhang

Chen

2019

IEEE Power Energy Technol. Syst. J.

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In this paper, a compositional power flow (ComPF) is devised for networked microgrids to take into account power sharing and voltage regulation between microgrids while preserving data privacy of each microgrid. The main contributions of the ComPF include: 1) devising an advanced-droop-controlbased power flow to incorporate distributed energy resources and load droops within microgrids and 2) establishing an adaptive-secondary-control-based compositional power flow scheme to account for power sharing and voltage regulation between microgrids. As an inherently distributed method, the ComPF supports plug-and-play of microgrids and preserves customer privacy. INDEX TERMS ComPF, advanced droop control, adaptive secondary control, privacy preserving.

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“…A load current injection-based load flow technique is presented in [26], in which a single load current to bus voltage matrix is used to perform both the backward and the forward sweeps of power flow calculation in a single step. The issue of solving power flow problem for islanded AC microgrids is also considered in [27]. To do that, the authors have reformulated the load flow problem such that the system frequency is one of the system's unknown variables which are typical for an islanded network justifying further the absence of a slack bus.…”

Section: Introductionmentioning

confidence: 99%

Line independency-based network modelling for backward/forward load flowanalysis of electrical power distribution systems

Taheri¹,

Khajezadeh²,

Koochi³

et al. 2019

Turk J Elec Eng & Comp Sci

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In this paper a straightforward method for line independency-based modelling of electrical power distribution systems is proposed. The proposed method can determine the backward and forward sweeping routes of distribution systems for calculating line currents and bus voltages. To do that, the method identifies the independent lines in consecutive steps. An independent line is a line in the distribution system whose current does not depend on the current of other lines in the system. The proposed line independency-based network modelling is required to be performed only once and prior to the load flow analysis. The output of the proposed method, which is suitable for backward/forward load flow analysis, includes matrices which determine the steps, the order of lines, and the start and end points in the system for hierarchical calculation of currents and voltages. In this paper, the forward/backward approach is used as the load-flow algorithm since it is suitable for radial distribution systems with unbalanced loads. The proposed methodology is applied on two IEEE distribution systems and the results show its efficiency in load flow analysis.

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A Modified Backward/Forward Sweep Load Flow Method for Islanded Radial Microgrids

Cited by 107 publications

References 32 publications

Augmentation of situational awareness by fault passage indicators in distribution network incorporating network reconfiguration

Augmentation of situational awareness by fault passage indicators in distribution network incorporating network reconfiguration

Compositional Power Flow for Networked Microgrids

Line independency-based network modelling for backward/forward load flowanalysis of electrical power distribution systems

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