A novel islanding detection method for microgrids based on variable impedance insertion

Papadimitriou, Christina; Kleftakis, Vasilis; Hatziargyriou, Nikos D.

doi:10.1016/j.epsr.2014.12.004

Cited by 43 publications

(34 citation statements)

References 9 publications

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“…Islanding protection using wavelet analysis and neuro-fuzzy system in inverter based distributed generation was researched into [16], and an adaptive ANN-controlled was proposed into [25] to reduce the NDZ consisting in passive islanding detection methods. Variable impedance insertion [30] and droop control [31] methods also offer different solutions to the subject. There have been a few FPGA-based islanding detection studies in recent years [32], but these studies present only particular, not general solutions to the problem.…”

Section: A Short Discussion Of Previous Workmentioning

confidence: 99%

A remote islanding detection and control strategy for photovoltaic-based distributed generation systems

Bayrak

2015

Energy Conversion and Management

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Section: A Short Discussion Of Previous Workmentioning

confidence: 99%

A remote islanding detection and control strategy for photovoltaic-based distributed generation systems

Bayrak

2015

Energy Conversion and Management

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“…For instance, the methods in [14], [24] is only valid for the synchronous DGs, and the procedures outlined in [15], [16] are just applicable to the inverter-based DGs. • Unlike to previous methods that cause a disturbance in the power system, like those introduced in [17], and [21] the suggested technique in this paper does not have any adverse effect on the operation of the power system such as reducing power quality and causing disturbance due to very small impedance switching.…”

Section: Comparison Of the Proposed Methods And Other Existing Appmentioning

confidence: 95%

“…The procedure presented in [16] can only be adopted for inverter-based DGs. Load changes in the normal operating condition of the power system may cause interference with the variable impedance insertion method [17]. Some of the other active methods include the active ROCOF relay, voltage harmonic distortion positive feedback [18], [19].…”

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confidence: 99%

Islanding Detection of Distributed Generation Based on Parallel Inductive Impedance Switching

Rostami

Jalilian

Zabihi

et al. 2020

IEEE Systems Journal

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This paper deals with a new islanding detection method based on parallel inductive impedance (PII) switching at distributed generation (DG) connection point, and monitoring the rate of change of voltage (dv/dt) at DG output. In the proposed approach, switching the PII causes variation in the dv/dt. This variation is very small in the case that DG operates in parallel with the main grid, whereas the changes will be very large during the occurrence of islanding. Therefore, the dv/dt is employed to identify both the islanding and non-islanding situations; however, to better analyze the dv/dt changes, the Fast Fourier Transform (FFT) is employed to process the variation of the dv/dt. To select the type of inserted impedance, the effect of switching various impedance types on the FFT(dv/dt) is thoroughly analyzed. It is demonstrated that the purely inductive impedance has better performance than other impedance types. The performance of the proposed method is examined through comprehensive simulation studies in MATLAB. The simulation results indicate that the proposed method retains its efficiency for both inverters-and synchronous-based DGs. Moreover, the proposed method not only has a substantial influence on the reduction of disturbances due to the small amount of PII, but it also eliminates the non-detection zone entirely in comparison with other available methods.Index Terms--Islanding, parallel inductive impedance switching, fast Fourier transform, the rate of change of voltage.

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“…Papadimitriou et al 28 proposed a hybrid automatic transfer switch that acts as an interconnection switch between the microgrid and the UG. Papadimitriou et al 28 proposed a hybrid automatic transfer switch that acts as an interconnection switch between the microgrid and the UG.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it becomes imperative to identify all the islanding events so that the microgrid can perform its autonomous operation to provide reliable power supply by proper management of its inverter control and storage devices. Papadimitriou et al 28 proposed a hybrid automatic transfer switch that acts as an interconnection switch between the microgrid and the UG. The benefit of this is to avoid any reconnection of two unsynchronised grids when the UG breaker closes again.…”

Section: Introductionmentioning

confidence: 99%

A combined islanding detection algorithm for grid connected multiple microgrids for enhanced microgrid utilisation

Radhakrishnan

Ashok

Sunitha

2019

Int Trans Electr Energ Syst

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SUMMARY There is an abundant interest in microgrids due to its innate ability to operate in either utility connected or isolated mode. The existing conventional methods disconnect the individual distributed generators on loss of utility. In this work, a combined islanding detection algorithm at the point of common coupling (PCC) of the whole microgrid is proposed. It detects islanding using islanding detection monitoring factor, rate of change of inverse hyperbolic cosecant function, and voltage at the PCC as the islanding detection elements with the help of phasor measurement units. On detection of islanding event, the whole microgrid is transferred to autonomous mode. Moreover, any fault in the microgrid side which may isolate the distributed generator is detected using dilation and erosion mathematical morphological operators. The algorithm estimates the probability of power balance and probability of islanding duration at the control centre for events within the microgrid. The decision for islanded operation or disconnecting the distributed generator is communicated based on this. The proposed method is tested on a microgrid test system and verified on a section of the realistic local feeder of the Indian utility system. The simulation results indicate that the developed algorithm is quick, reliable, and secure in discriminating between the islanding and nonislanding scenarios for the various cases during both import and export conditions with an accuracy of 100%. It eliminates the nondetection zone completely even during zero power mismatch conditions. With the proposed method, any unnecessary distributed generator outage can be avoided enhancing the microgrid utilisation.

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A novel islanding detection method for microgrids based on variable impedance insertion

Cited by 43 publications

References 9 publications

A remote islanding detection and control strategy for photovoltaic-based distributed generation systems

A remote islanding detection and control strategy for photovoltaic-based distributed generation systems

Islanding Detection of Distributed Generation Based on Parallel Inductive Impedance Switching

A combined islanding detection algorithm for grid connected multiple microgrids for enhanced microgrid utilisation

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