A new passive islanding detection approach considering the dynamic behavior of load in microgrid

Xie, Xing; Huang, Chun; Li, Danni

doi:10.1016/j.ijepes.2019.105619

Cited by 51 publications

(36 citation statements)

References 23 publications

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“…Active detection methods detect islanding operation based on the response of the DG when small periodic disturbances are intentionally injected on the frequency or voltage of the power system [4][5][6][7] in order to force the frequency or the voltage to drift up or down during islanding situation. 1 Despite their high accuracy to discriminate islanding events with a very small NDZ, active methods have an adverse influence on the distribution system operation owing to injection disturbances. [4][5][6][7][8][9] Moreover, it requires a time to inject a disturbance to detect the voltage or frequency changes.…”

Section: Active Methodsmentioning

confidence: 99%

“…[4][5][6][7] Passive detection methods are preferred because they are simple, easy for implementation, and applied to any network structure. 1 Moreover, they do not have any effect on the system stability and power quality. However, the major drawbacks of PDM are the large NDZ compared to active methods and low discrimination between non-islanding and islanding conditions.…”

Section: Passive Methodsmentioning

confidence: 99%

“…However, the integration of DG units into the utility distribution network is associated with some problems, such as power quality problems, protection coordination, and islanding operation. 1,2 One issue that should be considered is the islanding operation. Islanding operation is a situation in which the DG units continue to supply fully or partially the local loads after the grid is disconnected.…”

Section: Introductionmentioning

confidence: 99%

“…Islanding operation is a situation in which the DG units continue to supply fully or partially the local loads after the grid is disconnected. [1][2][3][4][5][6][7][8] This situation can lead to many potential hazards since the DG units are without control and supervision of utility. Therefore, this situation should be detected and protected rapidly.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the serious consequences islanding situation can cause, IEC-62116, IEEE STD-1547, and IEEE STD-929 standards decided that islanding situation should be detected and prevented. [1][2][3] IEEE Standard 1547.4-2011 determines a delay of 2 seconds for islanding situation detection. 9,10 This paper consists of seven sections as follows: Section 2 demonstrates the current detection methods and the study contributions.…”

Section: Introductionmentioning

confidence: 99%

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Zero non‐detection zone assessment for anti‐islanding protection in rotating machines based distributed generation system

Abd-Elkader

Saleh

2020

Int J Energy Res

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The challenges for a reliable operation of electrical power system have increased due to the presence of multi-distributed generation units (DGs) in the distribution systems in order to meet the increase of the load demand. Detection of unintentional islanding situation is very important as nondetection of islanding situation could result in a cascaded failure of the system. If the islanding situation remains undetected, the instability in the islanded part can lead to a complete failure of the electrical power system. This paper introduces a new passive scheme for islanding detection, which is suitable for multi-distributed generation units based on rotating machines. The proposed method is based on the measurements of the system voltage and frequency to compute two indices called the islanding index and harmonics index. The islanding index is the main index used to discriminate and identify the islanding situation. However, the harmonics index in conjunction with a strategy called speed reduction strategy assists the islanding index to discriminate between islanding situation in case of a close power match and system disturbances. The simulation studies were conducted in MATLAB/SIMULINK environment, and various cases have been considered, such as normal operation, islanding operation, sudden load change, DG tripping, separation of some DG units, faults, etc. The novelty of the proposed strategy is that it provides fast detection and has zero nondetection zone compared with the existing detection methods. Moreover, the proposed strategy has no effect on the power quality, and the maximum detection time is almost 350 ms at a close power match. The results indicate that the proposed scheme is successful in discrimination of the islanding conditions from other grid disturbances, revealing its great potential to be able to detect islanding events. Finally, the proposed method is applied only for rotating machine based DGs, such as wind turbines. Wind farms'

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Section: Active Methodsmentioning

confidence: 99%

Section: Passive Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zero non‐detection zone assessment for anti‐islanding protection in rotating machines based distributed generation system

Abd-Elkader

Saleh

2020

Int J Energy Res

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Hybrid islanding detection technique for distribution network considering the dynamic behavior of power and load

Jhuma

Mekhilef

Mubin

et al. 2021

Circuit Theory & Apps

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Nowadays, distributed generation (DG) has become an indispensable part for meeting the growing power demand in electrical power generation and distribution. However, one of the drawbacks of DG is unintentional islanding phenomena, which has become a safety issue for both human and equipment connected to the system. To prevent this hazardous condition, according to IEEE 1547 standards, this islanding condition must be detected within 2 s. This paper proposed an approach to develop a hybrid islanding detection method (IDM) to prevent the damages caused by this islanding condition. The proposed hybrid IDM is a combination of three different IDMs, two passive and one active; that is, rate of change of active power (ROCOAP) and rate of change of reactive power (ROCORP) are passive IDMs where load connecting strategy (LCS) is active. To differentiate islanding conditions with similar occurrences, different case studies are taken into account with photovoltaic (PV) and synchronous generator (SG) working as distributed generators on PSCAD/EMTDC platform. The simulation results confirm that proposed IDM is more favorable compared to other IDMs due to simplicity and fast islanding detection time when its performance is tested on the 11-kV Malaysian distribution system for various cases.

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A Novel Islanding Detection Technique for Grid-Connected Distributed Generation Using KNN and SVM

Tikar¹,

Kankale²,

Paraskar³

2021

Springer Proceedings in Energy

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A new passive islanding detection approach considering the dynamic behavior of load in microgrid

Cited by 51 publications

References 23 publications

Zero non‐detection zone assessment for anti‐islanding protection in rotating machines based distributed generation system

Zero non‐detection zone assessment for anti‐islanding protection in rotating machines based distributed generation system

Hybrid islanding detection technique for distribution network considering the dynamic behavior of power and load

A Novel Islanding Detection Technique for Grid-Connected Distributed Generation Using KNN and SVM

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