Review on islanding detection methods for grid‐connected photovoltaic systems, existing limitations and future insights

Bakhshi‐Jafarabadi, Reza; Sadeh, Javad; Serrano‐Fontova, Alexandre; Rakhshani, Elyas

doi:10.1049/rpg2.12554

Cited by 18 publications

(5 citation statements)

References 76 publications

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“…In the proposed method, the injected harmonic currents differ from those used in AFD [22,25], resulting in different inverter output currents, as depicted in Figure 3.…”

Section: Principle Of the Proposed Methodsmentioning

confidence: 99%

“…In this context, outstanding work has been conducted by Bakhshi-Jafarabadi R. et al [25] which extensively summaries the technical requirements for GCPVS, such as LVRT (also known as fault-ride-through); reactive power control and voltage support; active power and frequency support; inertia emulation, and so on.…”

Section: Review Of the Conventional Afd Techniquementioning

confidence: 99%

“…One of the interesting new topics of IDM is its interference with ancillary services. In this context, outstanding work has been conducted by Bakhshi-Jafarabadi R. et al [25] which extensively summaries the technical requirements for GCPVS, such as LVRT (also known as fault-ride-through); reactive power control and voltage support; active power and frequency support; inertia emulation, and so on. This paper presents an active islanding detection technique that utilizes different current injection waveforms to efficiently mitigate harmonic distortion.…”

Section: Introductionmentioning

confidence: 99%

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Improved Active Islanding Detection Technique with Different Current Injection Waveform

Zhang

Wang²,

et al. 2023

Processes

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The active frequency drift (AFD) method is an effective method to detect islanding in grid-connected photovoltaic systems. However, it has some inherent drawbacks, such as generating higher harmonics. In order to reduce the harmonics and non-detection zone (NDZ), various improved AFD methods have been proposed, but they still suffer from high harmonics and reduced detection speed. To overcome these limitations, this paper proposes an innovative islanding detection technique based on AFD. Analysis reveals that the proposed method reduces harmonics by 68% compared to conventional AFD and has a larger chopping factor. Therefore, this technique offers several distinct advantages, including accelerated detection speed, reduced NDZ and harm caused by disturbances, and improved power quality. Furthermore, to verify the harmonic impact of this proposed islanding detection method, simulations and analyses are conducted using simulation software of Matlab/Simulink. An experimental prototype is set up in Laboratory. The simulation and experimental results demonstrate the superiority of the proposed method.

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“…In the proposed method, the injected harmonic currents differ from those used in AFD [22,25], resulting in different inverter output currents, as depicted in Figure 3.…”

Section: Principle Of the Proposed Methodsmentioning

confidence: 99%

Section: Review Of the Conventional Afd Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved Active Islanding Detection Technique with Different Current Injection Waveform

Zhang

Wang²,

et al. 2023

Processes

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“…Short circuits are the leading problem causing the most significant effect on electrical networks. A short circuit on the transmission network may cause the disconnection of numerous DG units resulting in damaging incidents such as voltage sag [39]. Hence, properly performing the short circuit analyses for every integrated DG is required to examine the negative effects of failure.…”

Section: Main Challenges Associated With Integrating Res Into Dgmentioning

confidence: 99%

A comprehensive review of recent advances in optimal allocation methods for distributed renewable generation

Tercan,

Demirci,

Unutmaz

et al. 2023

IET Renewable Power Gen

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Distributed generation (DG) has a key role in enlarging the implementation of renewable energy resources (RES). However, the intermittent and uncontrollable nature of RES can lead to several severe power quality‐related issues. Therefore, many efforts have been made to overcome these issues by optimizing DG sizes and locations. Hence, optimal DG allocation (ODGA) is significant for DG performance and provides advantages to the power system, such as improved power quality, voltage stability, reliability, and profitability. This study reviews recent ODGA studies eliminating the main DG integration problems. Often used ODGA methods have been categorized, and the main differences have been discussed, giving the details of features of optimization methods such as convergence performance and computational burden. A deep analysis for categorizing the objectives of ODGA has been done. In addition, optimization methods applied in ODGA studies have been presented by comparing the superiorities of algorithms and validated test network models. The objectives and significant findings of the ODGA applications are summarized with the advantages and disadvantages. It can be concluded that ODGA has a critical role in RES integration on the DG side and in reducing carbon emissions. This paper leads and provides a perspective for researchers working on recent ODGA methods.

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“…This situation refers to the condition where a portion of the DGs continues to generate power and operate independently of the main grid. It may include power quality disturbances, safety hazards for network personnel, unexpected changes in the fault current level, and a damaging effect on electrical machines and transformers due to out‐of‐phase reclosing [16].…”

Section: Introductionmentioning

confidence: 99%

Analysis of fault current contributions from small‐scale single‐phase photovoltaic inverters and their impacts on the protection of electric power distribution systems

de Almeida,

da Costa Lima,

Macedo Junior

2024

IET Generation Trans & Dist

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This paper presents an analysis of the fault current contributions of small‐scale single‐phase photovoltaic inverters under grid‐connected operation and their potential impact on the protection of distribution systems. To conduct this analysis, an autotransformer‐based voltage dip generator is proposed as a means to test the photovoltaic inverters' contribution to short‐circuit currents. Laboratory tests are then performed to obtain the short‐circuit current contribution of eight single‐phase photovoltaic inverters. Using the short‐circuit current data obtained, a behaviour model is developed and simulated on Matlab‐Simulink. The model is then applied to a real distribution system and case studies are conducted to simulate the potential impacts on the protection system. Results indicate that while the massive penetration of small‐scale single‐phase photovoltaic inverters can alter the protection system's operating time, the impacts are not significant. Only in very specific scenarios, such as events related to high impedance faults, some impact can be observed. In these situations, the presence of photovoltaic inverters further complicates the already difficult task of identifying high impedance faults through conventional overcurrent protections. This study provides valuable insights into the integration of photovoltaic inverters into distribution systems, and can aid in the development of effective protection measures for future grid designs.

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Review on islanding detection methods for grid‐connected photovoltaic systems, existing limitations and future insights

Cited by 18 publications

References 76 publications

Improved Active Islanding Detection Technique with Different Current Injection Waveform

Improved Active Islanding Detection Technique with Different Current Injection Waveform

A comprehensive review of recent advances in optimal allocation methods for distributed renewable generation

Analysis of fault current contributions from small‐scale single‐phase photovoltaic inverters and their impacts on the protection of electric power distribution systems

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