Determination of Overcurrent Protection Settings Based on Estimation of Short-Circuit Currents Using Local Measurements

Chapi, Fernando; Fonseca, Antonio Manuel Ferreira Leal Mendoça da; Pérez, Fabián

doi:10.1109/etcm48019.2019.9014903

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…The simulation was performed with DIgSILENT Power Factory software, already used to study the protection of distribution systems with DG [72,[76][77][78][79]. This distribution network design has been successfully used to study static short-circuit currents [80], the maximum possible photovoltaic power penetration into a network in relation to the demand response [81], voltage regulation strategies in DG [78,82,83], or fault ride-through in power networks related to renewable energy (wind and photovoltaic) [79]. Besides, it should be also said that DIgSILENT Power Factory software is a powerful simulation tool that integrates the following standard methodologies for short-circuit calculations: IEC 60909, IEEE 141/ANSI C37, VDE 0102/0103, G74, and IEC 61363.…”

Section: Materials and Methodologymentioning

confidence: 99%

Effect of Distributed Photovoltaic Generation on Short-Circuit Currents and Fault Detection in Distribution Networks: A Practical Case Study

et al. 2021

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The increase in the installation of renewable energy sources in electrical systems has changed the power distribution networks, and a new scenario regarding protection devices has arisen. Distributed generation (DG) might produce artificial delays regarding the performance of protection devices when acting as a result of short-circuits. In this study, the preliminary research results carried out to analyze the effect of renewable energy sources (photovoltaic, wind generation, etc.) on the protection devices of a power grid are described. In order to study this problem in a well-defined scenario, a quite simple distribution network (similar to the ones present in rural areas) was selected. The distribution network was divided into three protection zones so that each of them had DG. In the Institute of Electrical and Electronic Engineers (IEEE) system 13 bus test feeder, the short-circuits with different levels of penetration were performed from 1 MVA to 3 MVA (that represent 25%, 50%, and 75% of the total load in the network). In the simulations carried out, it was observed that the installation of DG in this distribution network produced significant changes in the short-circuit currents, and the inadequate performance of the protection devices and the delay in their operating times (with differences of up to 180% in relation to the case without DG). The latter, that is, the impacts of photovoltaic DG on the reactions of protection devices in a radial distribution network, is the most relevant outcome of this work. These are the first results obtained from a research collaboration framework established by staff from ETSI Civil and the IDR/UPM Institute, to analyze the effect of renewable energy sources (as DG) on the protection devices of a radial distribution network.

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Section: Materials and Methodologymentioning

confidence: 99%

Effect of Distributed Photovoltaic Generation on Short-Circuit Currents and Fault Detection in Distribution Networks: A Practical Case Study

et al. 2021

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“…The S SC is around 1.68 pu and the loading increase in a non‐linear profile from less than 0.1 until 1 pu, where the maximum power transfer is reached. Because most of the generation is away from the Gualaceo 22 kV Bus, the value of Z TH and S SC determined from the present methodology correspond to the values of Thevenin impedance and three phase short circuit power determined directly by means of any short circuit program, as it was detailed in [32].…”

Section: Thevenin Equivalent Calculation On the Ecuadorian Grid Using...mentioning

confidence: 99%

Determination of the Thevenin equivalent in power grids using real records based on short circuit power

Fonseca

Salazar

Quilumba

et al. 2020

IET Generation Trans & Dist

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In recent years, methods for loadability determination based on real-time measurements have been proposed for long-term voltage stability scenarios. One of these methods corresponds to the reduction of the complete system into a basic Thevenin equivalent at a load bus. This paper proposes a method to determine the Thevenin equivalent at a load bus in power systems based on short circuit power (S SC ) and its application to real records. The proposed Thevenin equivalent evaluation is performed by processing two consecutive sets of voltage magnitude and power measurements, both recorded at the same bus of a power system. This method establishes a Thevenin equivalent based on the determination of system's equivalent voltage (V S ) which is obtained from S SC . This condition properly accounts for variable power factor load conditions and constant power factor alike in contrast with existing methodologies which assume constant power factor loads. The performance of this method is evaluated with real records from the Ecuadorian electric power system and contrasted by simulation.

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“…In the recent past, much research has been done on the protection of electrical power grids integrated with RESs [5]- [7]. The authors in [8] proposed the development of an overcurrent protection scheme due to the change of upstream of overcurrent protective devices in variations of short-circuit currents on the IEEE Distribution 13-Bus Test Feeder System. In [9], a communication-based protection scheme implementing directional overcurrent protection relays instead of reclosers at the line, assisted by inter-tripping and blocking transfer functions, is proposed.…”

Section: Introductionmentioning

confidence: 99%

Concise Definition of the Overcurrent Protection System for CIGRE European Medium Voltage Benchmark Network

Pham

Wagle

González-Longatt

2023

2023 IEEE PES Conference on Innovative Smart Grid Technologies - Middle East (ISGT Middle East)

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In the significant widespread transition towards clean energies, there has been an unstoppable trend in integrating renewable energy sources (RESs) in distribution networks. However, the massive penetration of integrated multi-sources into conventional distribution systems may create several operational problems, such as malfunctioning protection systems. This paper concisely defines the setting for overcurrent protection applied to the CIGRE European (EU) Medium Voltage (MV) benchmark network. The benchmark system is commonly recommended for RESs penetration studies. In this paper, the authors show the calculations and results of the non-directional and directional overcurrent protection relay in a very educational and detailed way. The definition of the settings considers several operating situations and two short-circuit (SC) types: three-phase and single-line-toground. The main contribution of this paper is a well-documented and validated overcurrent protection settings of the CIGRE EU MV that can be used for teaching and research purposes.

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Determination of Overcurrent Protection Settings Based on Estimation of Short-Circuit Currents Using Local Measurements

Cited by 3 publications

References 9 publications

Effect of Distributed Photovoltaic Generation on Short-Circuit Currents and Fault Detection in Distribution Networks: A Practical Case Study

Effect of Distributed Photovoltaic Generation on Short-Circuit Currents and Fault Detection in Distribution Networks: A Practical Case Study

Determination of the Thevenin equivalent in power grids using real records based on short circuit power

Concise Definition of the Overcurrent Protection System for CIGRE European Medium Voltage Benchmark Network

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