An Islanding Detection Method for a Grid-Connected System Based on the Goertzel Algorithm

Kim, Jae-Hyung; Kim, Jun-Gu; Ji, Yongsung; Jung, Yong-Chae; Won, Chung-Yuen

doi:10.1109/tpel.2011.2107751

Cited by 149 publications

(90 citation statements)

References 8 publications

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“…This method can easily be implemented with the help of a microprocessor-based controller. However, this method degrades the power quality because of the disturbance signals, which causes a variation in the frequency or magnitude of the output current [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. …”

Section: Active Islanding Detection Methodsmentioning

confidence: 99%

Comparative Study of Passive and Active Islanding Detection Methods for PV Grid-Connected Systems

2018

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Photovoltaic (PV) power grid-connected systems have the advantages of being prompt and reliable supplies of electrical power. Nevertheless, the installation and operation requirements from the grid side have to be fulfilled in order to guarantee the security of the PV system technicians and the efficiency of the power system. Particularly, the potential for "islanding" is one of the dreads that are brought about by PV grid-connected systems. To be able to tackle these concerns, this paper investigates recent islanding detection techniques and topologies for PV systems. Active islanding detection techniques apply regular disturbances to the inverter system and then analyze the output voltage or frequency to investigate the islanding and stability of the grid. If the injected disturbances influence the load voltage or frequency, the controller forces the intermediate inverter to stop sending power to the connected load. In addition, several islanding detection techniques that inject a periodical signal to the reference current that causes a change in the magnitude of inverter output voltage when islanding happens in a three-phase photovoltaic grid-connected system are discussed. The validity of the proposed technique is tested and verified through PSIM software.

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Section: Active Islanding Detection Methodsmentioning

confidence: 99%

Comparative Study of Passive and Active Islanding Detection Methods for PV Grid-Connected Systems

2018

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“…Secondly, Δf is always within a narrow range because of the corrective action in the phase-locked loops circuit, when the grid operates properly [11] . Thirdly, the output voltage frequency of the inverter f inv will change, when the grid failure.…”

Section: A Afd Methodsmentioning

confidence: 99%

Research on Islanding Detection of Grid-Connected System

Liu¹,

Zhang²,

Chen³

et al. 2015

ijacsa

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Abstract-This paper proposed a modified detection based on the point of common coupling (PCC) voltage in the three−phrase inverter, combined over/under frequency protection, to achieve the detection of islanding states rapidly. Islanding detection is an common issue existing in distributed generation system. Compared with active islanding detection ,this method could detect the islanding quickly and effectively .The simulation and experimental results shows that this new method can detect the islanding phenomenon quickly and accurately, which can meet the requirement of islanding detection standard, which ensure the stability of the system and the power quality recycling to the grid.Index Terms-islanding detection; self−adaptive; active frequency shift; d−q transform

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“…A precise calculation of the power transmitted by the converter at harmonic frequencies can be done by assessing the expression For the practical implementation of (3), natural sampling of voltages and currents at SF is not enough due to Nyquist limit, but oversampling can help in complying with these requirements. In any case, other simplified methods such as Goertzel algorithm [17] are better suited for on-line applications [18]. In this light method, just a selected number of harmonics are identified, which can be enough to calculate the resistive component of grid impedance, R eq , at the most significative bands of the spectrum.…”

Section: Distortion Losses In the Local Gridmentioning

confidence: 99%

Improved efficiency of local EPS through variable switching frequency control of distributed resources

Cano

Suárez

Navarro-Rodríguez

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-This contribution explores the possibility of improving the global efficiency of three-phase inverter-based distributed resources (DR) embedded in low-voltage (LV) distribution feeders, by the adaptation of their switching frequency (SF) to the operation point of both the converter and local loads. The core of this proposal lies on the fact that in a good number of applications, in both services and residential sectors, the owner of the DR is also in charge of the losses caused in the local electric power system (EPS). This fact leaves room for a global optimization of the power losses, i.e, converter losses will be considered together with those losses caused by the current harmonics injected into the local grid. A dynamic adaptive SF frame of the DR is considered in this proposal to allow its operation beyond its rated frequency at light loads, subjected to the thermal constraints of the device. Simulation results obtained using PLECS software as well as an experimental validation of the method are included.

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An Islanding Detection Method for a Grid-Connected System Based on the Goertzel Algorithm

Cited by 149 publications

References 8 publications

Comparative Study of Passive and Active Islanding Detection Methods for PV Grid-Connected Systems

Comparative Study of Passive and Active Islanding Detection Methods for PV Grid-Connected Systems

Research on Islanding Detection of Grid-Connected System

Improved efficiency of local EPS through variable switching frequency control of distributed resources

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