Identification of the Radial Configurations Extracted From the Weakly Meshed Structures of Electrical Distribution Systems

Andrei, Horia; Chicco, Gianfranco

doi:10.1109/tcsi.2008.916432

Cited by 26 publications

(28 citation statements)

References 29 publications

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“…Switches 12,16,21,24,25,32,35,52,55,58 and 79 are opened to maintain the radial constraint of the topology. The two faults, shown in Figure 14, occur in different laterals in feeder F2.…”

Section: Test Case 2: Simultaneous Faults In Different Laterals In Thmentioning

confidence: 99%

“…Though methods to identify distribution system topologies have been proposed [25][26][27][28], they do not mention how to transform the network into mathematical forms that can be used for faulted section location. Each method works off-line, meaning that they cannot automatically update the system configuration and identify radial feeders in real time.…”

Section: Introductionmentioning

confidence: 99%

“…In distribution systems, for the frequent changing of its topology, it is an onerous task to do the two parts manually. The algorithms proposed in [22][23][24][25] can only recognize the topology of the network. Thus, the novel algorithm proposed in this paper is that it can dramatically reduce the required manpower and is not affected by the changes of topology.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Automatic Faulted Feeder Section Location and Isolation Method for Power Distribution Systems Considering the Change of Topology

2017

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Abstract:The increasing use of modern measuring devices, such as Feeder Terminal Units (FTUs), on power networks can provide multiple types of information for fault location on distribution systems. Using these devices, in this paper, a novel automatic matrix-based algorithm for the identification and isolation of faulted feeder sections on distribution systems is proposed. The algorithm works in two stages: the first stage automatically identifies the radial feeders that make up the whole system and represents the feeders' topology in matrix form; and the second stage automatically identifies the faulted section of the identified feeder and opens the relevant switches to isolate it. The algorithm can be applied to single and multiple faults, as it operates using measuring device information and detecting the status of switch devices. It does not require any electrical parameters and it is not affected by the fault type or fault resistance. The algorithm was thoroughly tested using a large distribution system and was found to efficiently identify and isolate the faulted feeder section in each case.

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“…Switches 12,16,21,24,25,32,35,52,55,58 and 79 are opened to maintain the radial constraint of the topology. The two faults, shown in Figure 14, occur in different laterals in feeder F2.…”

Section: Test Case 2: Simultaneous Faults In Different Laterals In Thmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Automatic Faulted Feeder Section Location and Isolation Method for Power Distribution Systems Considering the Change of Topology

2017

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“…i, j = number of edges between i and j i = j number of self-loops in i i= j (1) In this paper, as it was mentioned, all graphs will be simple digraphs so (1) can be reformulated as:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…In [19], the graph theory is used to analyze the effect of phase-shifting transformers over the power flow, determining the optimum number of this kind of devices and their location to reach a certain control in the whole power system. A new method to extract all possible radial configurations in a weakly meshed power system using graph based search methods is proposed in [1]. In [14] a three-phase distribution power flow solution for unbalanced radial distribution systems has been developed based on graph theory.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Graph Theory for Railway Power Supply Systems Characterization

2015

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Over the years, graph theory has proven to be a key tool in power systems modeling and analysis. In this paper, the authors propose a systematic method for railway power supply systems (RPSS) description that can be applied to any AC/DC system. This method represents the different elements of the RPSS with a set of subgraphs. Merging these subgraphs, the representative graph of the whole RPSS and its associated adjacency and incidence matrices will be obtained. Once these matrices are obtained, Kirchhoff's laws can be easily implemented. In this work, the method is applied to a DC light traction system. The AC system that feeds the traction network through power transformers combined with rectifiers is also included. With the proposed approach, the variability problems in the system topology and dimensions are overcome, obtaining an invariant system, even when the trains change their relative position, or when a new train enters into or exits the system.

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Determination of the relevant periods for intraday distribution system minimum loss reconfiguration

Mazza

Chicco

Andrei

et al. 2014

Int. Trans. Electr. Energ. Syst.

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Summary The recent trends toward enhancing distribution system automation and the development of microgrids are making the perspective of applying intraday reconfigurations more and more appealing. This paper formulates and applies a comprehensive rule‐based approach to determine the configuration with minimum losses during time for a distribution system with time‐varying load and local generation patterns. The results of the optimization carried out for successive periods are used to develop an original procedure for determining the timings of the intraday reconfiguration by taking into account the ranking of the best configurations and the persistence in time of these configurations. The objective function used depends on a parameter called cost ratio, that is, the ratio between the cost of the energy losses kilowatthour and the cost of performing a switching operation. A specific indicator (called objective assessment ratio) is introduced in order to quantify the convenience of performing intraday reconfiguration with respect to maintaining during the day the same configuration leading to the lowest daily energy losses. The results obtained on two classical test systems and on a real distribution network are included, comparing the outcomes of the proposed approach with the results obtained from other methods. Copyright © 2014 John Wiley & Sons, Ltd.

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Identification of the Radial Configurations Extracted From the Weakly Meshed Structures of Electrical Distribution Systems

Cited by 26 publications

References 29 publications

Automatic Faulted Feeder Section Location and Isolation Method for Power Distribution Systems Considering the Change of Topology

Automatic Faulted Feeder Section Location and Isolation Method for Power Distribution Systems Considering the Change of Topology

On the Use of Graph Theory for Railway Power Supply Systems Characterization

Determination of the relevant periods for intraday distribution system minimum loss reconfiguration

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