Two level islanding detection method for distributed generators in distribution networks

Shrivastava, Smita; Jain, Shailendra; Nema, Rajesh Kumar; Chaurasia, Vijayshri

doi:10.1016/j.ijepes.2016.10.009

Cited by 38 publications

(29 citation statements)

References 11 publications

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“…Unintentional islanding linked to an accidental disconnection of the grid is of great interest. This situation highlights the dangers of maintaining a voltage in the islanded grid and can generate risks on [7], [11]: It is therefore essential to detect any islanding situation and to reduce the running time of the system. This situation must be detected in order to:  To avoid feeding a fault or leaving a faulty system running.…”

Section: The Problematic Of Islandingmentioning

confidence: 99%

“…In our work, we present a simulation study on a Matlab / Simulink environment of a passive method of islanding detection which is based on the monitoring of the parameters related to the voltage on the DC side and the point of connection to the PCC (Point of Common Coupling) grid, Current and frequency [7], [11], [4]. This function is provided by the implementation of anti-islanding AI relays in the PV system such as over-voltage and under-voltage (OV / UV), over-current and under-current (OI / UI) relays and over-Frequency and under-frequency (OF / UF).…”

Section: Simulation Of Anti-islanding Protection Systemsmentioning

confidence: 99%

“…For our method to be functional, we compare directly the islanding detection time(s) in different scenarios of anti-islanding relays such as over-current and under-current (OI/UI), over-voltage and under-voltage (OV/UV) and over-frequency and underfrequency (OF/UF). [1] All these scenarios evaluate the performance of AI relays and then determine which one of the anti-islanding methods is the most effective and appropriate so as to work on Grid-tied PV system [11].…”

Section: Introductionmentioning

confidence: 99%

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Study and analysis of anti-islanding protection for grid-connected photovoltaic central of Ghardaia

Rezoug¹,

Chenni²,

Taibi³

2018

ces

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This paper aims at providing a simulation study of the nature of the Islanding phenomenon occurs in the Grid-Tied PV (photovoltaic) System and the different methods to detect it which permits us to protect the system. We are going to resort to a number of devices to put into practice these methods including over-current and undercurrent (OI/UI) relays, over-voltage and under-voltage (OV/UV) relays and over-frequency and under-frequency (OF/UF) relays. The protection is examined in two different circumstances, when the PV system is completely disconnected from the electric power grid and also during the occurrence of some various grid faults. These faults can lead to the decoupling of the inverter and cause of unintentional islanding phenomenon that has dangerous consequences particularly on equipment and on grid maintenance personnel.

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Section: The Problematic Of Islandingmentioning

confidence: 99%

Section: Simulation Of Anti-islanding Protection Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study and analysis of anti-islanding protection for grid-connected photovoltaic central of Ghardaia

Rezoug¹,

Chenni²,

Taibi³

2018

ces

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“…Various islanding detection schemes have been proposed, such as method based on exponentially damped sinusoidal signal estimation [1], two level islanding detection method [2], deep learning hybrid method [3], and islanding detection based on probabilistic principal component analysis [4]. Many of them are based on passive methods for recognizing islanding condition.…”

Section: Introductionmentioning

confidence: 99%

Probability risk assessment of island operation event for large scale photovoltaic plant

et al. 2019

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Original methodology for the calculation of island operation event occurrence possibility is proposed for the photovoltaic power plants connected to medium voltage grid. Within the methodology description, event fault tree with number of pairs of basic initial events is discussed, where probability for the basic events are defined and flow chart for the proposed calculation is given. The novelty in the approach for probability calculation includes also proposal for development of frequency distribution functions for concerned power generation and consumption variables which have to be modelled for the probability calculations, for which the triangular distributions curves have been chosen. Being boundary conditions for definition of non-detected island event, borders of non-detection zones are defined for the common island detection protection functions: over frequency and under frequency, over voltage and under voltage and rate of change of frequency functions. Comparison of the island event probability is presented on case study example, with conclusion that standard voltage and frequency protection alone are not satisfying, but ROCOF protection could be suitable, subject to particular local grid characteristic and calculative verification of probability.

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“…Fenghuang Cai analyzed the harmonic problem after using active frequency drift method, and the harmonic content is reduced without affecting the detection efficiency [3], but it enlarges the detection blind zone while eliminating the harmonic wave. Fangrui Liu improve island detection efficiency or reduce the impact on the network respectively by optimizing the disturbance mode, controller and disturbance parameters [4][5], but only consider the detection effect and ignore the disturbance on the system. In this paper, an improved AFD islanding detection method is proposed, which combines the advantages of active frequency drift detection and the q-axis reactive power perturbation (IQF).…”

Section: Introductionmentioning

confidence: 99%

A Novel Unscheduled Islanding Detection Method for Microgrid

Guo

et al. 2018

MATEC Web Conf.

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Abstract. Microgrid with its intelligent and flexible control characteristics conform to the trend of sustainable development of electricity, and when the microgrid in the unplanned island state, the successful detection of the island is a prerequisite, energy storage inverter as the key equipment in the microgrid system, island protection is one of the necessary functions. In this paper, an improved islanding detection method based on active frequency drift and q-axis reactive power perturbation is proposed. The method has the advantages of faster detection speed and minor influence on power quality, which makes the energy storage inverter with better output power quality when it works on grid-connected state, and can be detected the islanding state quickly from grid-connected mode to islanded mode. Finally, the validity and superiority of the improved island detection method are verified by simulation experiments.

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Two level islanding detection method for distributed generators in distribution networks

Cited by 38 publications

References 11 publications

Study and analysis of anti-islanding protection for grid-connected photovoltaic central of Ghardaia

Study and analysis of anti-islanding protection for grid-connected photovoltaic central of Ghardaia

Probability risk assessment of island operation event for large scale photovoltaic plant

A Novel Unscheduled Islanding Detection Method for Microgrid

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