Islanding Detection of Synchronous Generator-Based DGs using Rate of Change of Reactive Power

Nikolovski, Srete; Baghaee, Hamid Reza; Mlakić, Dragan

doi:10.1109/jsyst.2018.2889981

Cited by 89 publications

(35 citation statements)

References 28 publications

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“…As mentioned before, V q and I q are zero since the GCPVSs work at unity power factor in normal operating conditions. By combining (11) and (12), the maximum limit of disturbance gain is derived as…”

Section: Upper Limit Of K Vmentioning

confidence: 99%

“…These variations could stimulate under/over voltage, under/over frequency, and rate of change of frequency (ROCOF) relays as the early passive IDMs [7][8][9]. Several new algorithms which exploit the DG's or PCC electrical quantities have also been reported in [10][11][12][13][14]. The ratio of the equivalent resistance to the angular velocity of synchronousbased DG (SDG) at PCC has been proposed by Bekhradian et al [10].…”

Section: Introductionmentioning

confidence: 99%

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New voltage feedback‐based islanding detection method for grid‐connected photovoltaic systems of microgrid with zero non‐detection zone

Bakhshi‐Jafarabadi

Sadeh

2020

IET Renewable Power Generation

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This study proposes a fast and precise voltage feedback-based islanding detection method (IDM) for grid-connected photovoltaic systems (GCPVSs) based microgrid. In this algorithm, a disturbance containing the absolute deviation of the output voltage is injected into the inverter's d-axis reference current which tunes the active power output. In islanded mode, the applied disturbance reduces the active power output and consequently point of common coupling voltage beyond the standard setting while its effect at the presence of the grid is negligible. The assessment of the proposed IDM has been conducted in the MATLAB/Simulink platform under extensive scenarios defined by IEEE 1547-2008 and UL 1741 standards for a case study system with two large-scale GCPVSs. The provided outputs remark accurate islanding classification in all cases within 810 ms, much lower than the maximum permissible time postulated in islanding standards. This time is short enough to restore GCPVS for autonomous operation of microgrid as well. The comparative analysis of the proposed strategy with a few existing IDMs confirmed its overall superiorities in the terms of non-detection zone, detection time, being applicable into the microgrid, simple threshold determination, and straightforward and cost-effective implementation.

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Section: Upper Limit Of K Vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New voltage feedback‐based islanding detection method for grid‐connected photovoltaic systems of microgrid with zero non‐detection zone

Bakhshi‐Jafarabadi

Sadeh

2020

IET Renewable Power Generation

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“…These methods are more efficient in detecting islanding phenomenon compared to the OUV/F method appropriate to the rapid islanding detection and smaller NDZ [10]. Nowadays, a lot of researchers extend attentions to the utilization of the ROCORP method entitled to the easiness and efficiency in which can be further comprehend in [18], [19]. Nonetheless, the NDZ area for ROCOP is still big if the method is utilized without integration with other methods.…”

Section: A Over/under Voltage (Ouv) and Over/under Frequency (Ouf)mentioning

confidence: 99%

A Research of Islanding Detection Method for Distributed Generation: Mechanism, Merits and Demerits

2019

IJITEE

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Renewable energy is substantially applied at the distribution grid in order to fulfill the electricity demand as well as addressing global heating issue caused by conventional energy source. However, application of the distributed energy source raises new concern in regards of unintentional islanding activity in which prompts grid protection issues hence, endangering utility worker’s safety. These several decades feature thousands of invention and innovation of anti-islanding method developed by researchers to satisfy the demand of grid protection. Therefore, this paper conducts an overview on several islanding detection schemes with concentration on the mechanism of the method, the merits as well as the demerits of the scheme. It is concluded that there is no ideal method developed as yet, but some of these methods or integration of them are able to be applied practically to specific distributed source and grid structure.

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“…It should be noted that, the realized factors by the various IDSs have been highlighted in Table 1. For instance, some of these IDSs are thoroughly discussed below. Although, some of the factors include the DT, SBDG independency, and cost of implementation have been realized by the proposed IDS in Reference 6 the NDZ value is not removed completely and mal‐operation during some islanding and GCD events is quite probable. The introduced method in Reference 8 due to using the reactive power parameter can quickly detects the occurred events as well as its implementation is quite simple and cost‐effective. However, the NDZ value is noticeable and its operation is dependent on the SBDG operating conditions (eg, power factor value) as well as it may sends wrong tripping command to SBDG during some GCD events. The suggested IDS by Reference 18 can immediately and reliably without any NDZ value recognizes all the happened events as well as does not require extra devices to implementation.…”

Section: Introductionmentioning

confidence: 99%

A multi‐feature‐based passive islanding detection scheme for synchronous‐machine ‐based distributed generation

Rostami

Rezaei

2020

Int Trans Electr Energ Syst

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Summary In this article, a new passive islanding detection scheme is presented for synchronous based distributed generation units (SBDGs) considering most vital islanding detection factors such as non‐detection zone (NDZ), event detection time, high reliability in clustering events, cost of implementation, and independency of SBDG parameters. To do so, three‐main concepts are considered: (a) the use of the electrical parameters from the SBDG unit which are independent from inertia, (b) the combination of various passive parameters, and (c) the utilization of the d‐q framework of SBDG that can present its true behavior during the normal and abnormal events. Therefore, five parameters including q‐component of damper winding current, d‐ as well as q‐components of stator winding currents, reactive power and positive sequence of voltage are selected owing to the fast abruptly changes imposed on their pattern of variations during the disturbances. In this regard, to accurately detect the occurred events, three features based on the selected parameters are considered, which are (dIdm/dt), (dId/dIq) and (dVps/dQ). To demonstrate the effectiveness of the proposed islanding detection scheme (IDS), exhustive simulation studies are performed in MATLAB environment. The results illustrate that by means of the defined parameters, high reliable perfomance of the proposed approach is satisfied through recognizing all the islanding and grid‐connected disturbance (GCD) conditions, including zero power imbalance, within minimum time compared to the existing methods available in literature. It is also revealed that the SBDG parameters do not have any adverse effect on the suggested IDS performance.

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Islanding Detection of Synchronous Generator-Based DGs using Rate of Change of Reactive Power

Cited by 89 publications

References 28 publications

New voltage feedback‐based islanding detection method for grid‐connected photovoltaic systems of microgrid with zero non‐detection zone

New voltage feedback‐based islanding detection method for grid‐connected photovoltaic systems of microgrid with zero non‐detection zone

A Research of Islanding Detection Method for Distributed Generation: Mechanism, Merits and Demerits

A multi‐feature‐based passive islanding detection scheme for synchronous‐machine ‐based distributed generation

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