Reliability Assessment of Distribution Systems Considering Telecontrolled Switches and Microgrids

Conti, S.; Rizzo, Santi Agatino; El-Saadany, Ehab F.; Essam, Mohammed; Atwa, Y.M.

doi:10.1109/tpwrs.2013.2287301

Cited by 54 publications

(40 citation statements)

References 14 publications

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“…The PoA is a measure of this effect. More specifically, many different "scenarios" can be accounted for by analyzing the potential effects [4]. For the sake of completeness, Appendix A reports the formulas to be used to assess outage rate (λi,k) and duration (Ui,k) at LP i when a fault occurs in branch k, for all possible scenarios.…”

Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

“…For the sake of completeness, Appendix A reports the formulas to be used to assess outage rate (λi,k) and duration (Ui,k) at LP i when a fault occurs in branch k, for all possible scenarios. Further details can be found in [4]. The effect of a faulted branch on a LP depends on the LP location, the location of the faulted branch, the type of the switches, and the installation point.…”

Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

“…The DNOs can employ different strategies to improve the reliability performance of the distribution networks: executing network maintenance actions to prevent fault events [2]; reallocating or installing additional switches along the distribution network [3]; introducing telecontrol and automation systems [4]; adopting new network management The present work proposes an efficient computational approach that is able to overcome the limitation of the previous ones and also account for load and generation correlations, thus obtaining a very accurate measure of the reliability improvement that can be achieved thanks to islanding in distribution networks where telecontrolled CBs as well as telecontrolled and manual sectionalizers are installed.…”

Section: Introductionmentioning

confidence: 99%

“…In order to calculate distribution network reliability, the analytical equations of load point outage rate and duration that account for a protection scheme based on telecontrolled switches [4] are combined with the formulation proposed for adequacy computation. Such a formulation uses a Markov chain for modeling the ratio between load and generation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Islanding and Telecontrolled Switches on Distribution System Reliability Considering Load and Green-Energy Fluctuations

et al. 2016

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Abstract:To improve electrical distribution network reliability, some portions of the network could operate in autonomous mode, provided that the related technical issues are addressed. More specifically, when there is not a path from those portions to the primary substation due to a fault in the network, such portions could be disconnected from the main network and supplied by local generation only. Such a mode of operation is known as "intentional islanding" and its effectiveness, in terms of adequacy, depends on the ability of the local generation to meet the island's load. In fact, the ratio between the available local generation and load demand can frequently change during islanding due to load variations and, especially, due to the strongly irregular behavior of the primary energy sources of renewable generators. This paper proposes an analytical formulation to assess local generation adequacy during intentional islanding, accounting for the aforementioned variations. More specifically, the fluctuations of load and green-energy generators during islanding are modeled by means of Markov chains, whose output quantities are encompassed in the proposed analytical formulation. Such a formulation is used by the analytical equations of load points' outage rate and duration. The evaluation of the reliability indices accounts for a protection scheme based on an appropriate communication infrastructure. Therefore, a brief overview on the telecommunications technologies has been presented with reference to their suitability for the specific application. In particular, distribution network safety issues have been considered as the main concern. The results show that neglecting load and generation fluctuations leads to a strong overestimation of the ability of distributed generators to meet the island load. Through a case study it is observed that the error on the load point outage rate is greater than the one affecting the outage duration.

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Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

Section: Analytical Evaluation Of Distribution System Reliability Accmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Islanding and Telecontrolled Switches on Distribution System Reliability Considering Load and Green-Energy Fluctuations

et al. 2016

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Assessing the potential of MV automation for distribution network reliability improvement

Rodriguez-Calvo

Cossent

Frías

2017

Int Trans Electr Energ Syst

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Summary Distribution network automation is a key functionality in the evolution towards smarter electricity grids. The main driver to deploy this kind of smart grid solutions is the improvement of continuity of supply for network users; thanks to the fact that an enhanced network monitoring and telecontrol can improve the fault management process conducted by distribution system operators. However, the parameters that affect their successful implementation are not completely understood yet. Addressing this gap, this paper presents a detailed analysis to identify the main factors affecting the implementation of automation at medium voltage distribution networks and discusses the regulatory implications. Several realistic case studies are analyzed, corresponding to a number distribution networks that resemble the architectural characteristics representative of the European distribution grids in different contexts. Hence, the results allow deriving general conclusions that can be widely applicable to European distribution networks.

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A strategy for intentional islanding of distribution networks based on node electrical relevance and artificial bee colony algorithm

Zhang

Peng

et al. 2017

IEEJ Transactions Elec Engng

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Intentional islanding is an effective approach to avoid large-area blackouts and minimize outage losses through making full use of renewable energy sources. This paper proposes a novel strategy based on node electrical relevance and artificial bee colony algorithm. The node electrical relevance is defined with equivalent electrical distance and traditional line weight, which can reflect the electrical characteristics of power systems, differentiating the proposed strategy from most existing strategies which are based on graph theory. The artificial bee colony (ABC) algorithm employed has fewer control parameters, strong robustness, and high accuracy; therefore, more loads can be incorporated into islands and restored. The constraints of load priority, load controllability, line capacity, and stable operation requirements of power systems are considered to tally with the actual distribution networks. The strategy is tested using the IEEE 69-bus distribution system and compared with other strategies from the literature. The simulation results demonstrate that the proposed strategy is more feasible and efficient.

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Reliability Assessment of Distribution Systems Considering Telecontrolled Switches and Microgrids

Cited by 54 publications

References 14 publications

Effect of Islanding and Telecontrolled Switches on Distribution System Reliability Considering Load and Green-Energy Fluctuations

Effect of Islanding and Telecontrolled Switches on Distribution System Reliability Considering Load and Green-Energy Fluctuations

Assessing the potential of MV automation for distribution network reliability improvement

A strategy for intentional islanding of distribution networks based on node electrical relevance and artificial bee colony algorithm

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