A Novel Active Frequency Drift Method of Islanding Prevention for the grid-connected Photovoltaic Inverter

Jung, Youngae; Yu, Bing; So, Jung-Hun; Yu, Gwon-Jong; Choi, Jaeho

doi:10.1109/pesc.2005.1581893

Cited by 55 publications

(47 citation statements)

References 5 publications

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“…SFS method is an innovative method enhanced from Active Frequency Drift (AFD) [29]. SFS using positive feedback by creating to some extent uneven phase angle at inverter output current through adding up truncations or dead times to the current waveform [23,25].…”

Section: Sandia Frequency Shift (Sfs)mentioning

confidence: 99%

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Khichar

Lalwani

2018

Technol Econ Smart Grids Sustain Energy

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This paper provides an analytical survey of the islanding detection techniques for the distributed generation systems. Islanding phenomena on takes place when the power supply from the main utility is intermittent due to numerous reasons, but the distributed generation keeps supplying power into the distribution networks. Islanding can be dangerous to workers and electrical equipment, even the power grid. Therefore, islanding detection is the priority among priorities. Islanding detection is a precondition of two working modes switching for distributed generation. In this paper, a detailed description followed by the classification of the islanding detection techniques has been made based on features, such as detection time, size of non-detection zone, power quality disturbances, system cost and operation under multiple distributed generation units. The merits and demerits of islanding detection methods are analyzed and summarized in this paper. In this manner, the greatest detection outcome can be achieved by exploiting the merits of each method. This paper is aimed to serve as a convenient reference and guidance value for deciding the islanding detection method for future islanding users in distributed generation system.

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Section: Sandia Frequency Shift (Sfs)mentioning

confidence: 99%

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Khichar

Lalwani

2018

Technol Econ Smart Grids Sustain Energy

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“…But, due to the fixed value of cf, the conventional AFD has a large NDZ and is too slow to meet the islanding detection time limit. 11 So, positive feedback is used in the control of the inverter so that APF (Active Power Filter) absorbs (supplies) more reactive power as the island's frequency increases (or decreases),…”

Section: A the Cdpf Modelmentioning

confidence: 99%

“…8 In order to weaken previous adverse effect, the positive feedback is accessed in IDMs. Several feedback IDMs are mentioned in this article including Current-Disturbing Positive Feedback (CDPF), 9,10 Active Frequency Drift Positive Feedback (AFDPF), 11,12 and Sandia Frequency Shift (SFS) 13,14 IDMs. They are commonly used in current islanding detection.…”

mentioning

confidence: 99%

Interference of various active islanding detection methods with positive feedback in multi-inverter power system

Chen

Wang

Tian

et al. 2015

Journal of Renewable and Sustainable Energy

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The islanding condition occurs when the utility is disconnected and the distributed generation (DG) continues to supply power for local load. This condition is not desirable which brings about the instability of voltage and frequency as well as the power quality degradation, thus presenting a great threaten to maintenance personnel. Considering equipment safety and personnel safety, unintentional islanding for DG operation will not be tolerated here. The study of interference of different islanding detection methods (IDMs) in multi-inverter situations as the potential method has attracted a lot of attention in relevant field. This paper discusses interaction and degradation of three active and positive feedback IDMs, including current-disturbing positive feedback, active frequency drift positive feedback, and Sandia frequency shift IDMs. Non-detection zones of multi-inverter systems in a load parameter space are used as analysis tool. Two 220 V–1 kW Simulink models are set up for the simulation tests and three scenarios with potential for interference and degradation of the system are simulated. Simulation results confirm that multi-inverter equipped with both current and frequency positive feedback disturbing exhibits more complicated phenomenon than the one equipped with single disturbing method.

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“…However, the AFD method produces a small degradation in the quality of the DG output and the inverter has an NDZ that depends on the value of the chopping factor. There are similar techniques allowing to obtain better results by changing the chopping factor, with a significant reduction in the NDZ, like the following ones: Active Frequency Drift with Positive Feedback (AFDPF) (Jung et al, 2005), AFD with Pulsation of Chopping Fraction (AFDPCF) (Liu et al, 2007), among others.…”

Section: Active Frequency Drift (Afd)mentioning

confidence: 99%

Local and Remote Techniques for Islanding Detection in Distributed Generators

Rodríguez¹,

Velasco²,

Figueres³

et al. 2010

Distributed Generation

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A Novel Active Frequency Drift Method of Islanding Prevention for the grid-connected Photovoltaic Inverter

Cited by 55 publications

References 5 publications

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Interference of various active islanding detection methods with positive feedback in multi-inverter power system

Local and Remote Techniques for Islanding Detection in Distributed Generators

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