An Islanding Detection Method for Distributed Generations Using Voltage Unbalance and Total Harmonic Distortion of Current

Jang, Sung-Il; Kim, Kwang‐Ho

doi:10.1109/tpwrd.2003.822964

Cited by 493 publications

(232 citation statements)

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“…Keeping in view the anticipated influx of newer technologies, in distribution systems, in future [7,8,9], it is necessary to investigate the impacts of various non-linear home appliances on the power quality of electrical distribution system. The research work presented in [10,11] was carried out to evaluate the impacts of compact fluorescent lamps (CFL) and personal computers (PC) but operating in an isolated mode.…”

Section: ×100mentioning

confidence: 99%

Investigating the Power Quality of an Electrical Distribution System Stressed by Non-Linear Domestic Appliances

Farooq¹,

Zhou²,

Allan³

et al. 2024

RE&PQJ

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Abstract:Power quality has become a matter of growing concern in recent years owing to a daily rise in use of non-linear loads at domestic level. In addition, fast growing technologies like distributed generation and electric vehicles are emerging as part of modern distribution systems. Therefore, it is necessary to evaluate and analyze the power quality issues due to various non-linear home appliances to give a clear picture of the current scenario. So that future technologies can be accommodated in the distribution systems while coping with existing power quality issues. The experimentally developed harmonic models, of various commonly deployed domestic appliances, are used for the simulation of a practical distribution system in Electrical Transient Analyzer Program (ETAP). Experimental results combined with simulation results show an alarmingly high level of harmonic distortion, breaching the recommended standard practices, in both current and voltage at not only point of common coupling (PCC) but also at the consumer's end. In addition to increase in losses, this also degrades power factor giving rise to distortion power. While discussing other impacts of harmonic distortion, true power factor (PF true ) and distortion power (D) has also been evaluated at PCC.

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Section: ×100mentioning

confidence: 99%

Investigating the Power Quality of an Electrical Distribution System Stressed by Non-Linear Domestic Appliances

Farooq¹,

Zhou²,

Allan³

et al. 2024

RE&PQJ

View full text Add to dashboard Cite

show abstract

“…For fault-induced islanding, protection relays equipped by DG, such as overcurrent relay, are responsible to isolate the DG from the fault [4,5]. And anti-islanding protection is equipped to disconnect DG immediately after islanding formation, especially for islanding that is not induced by the fault, which is also used to evaluate the performance of the anti-islanding protection relay [6,7].…”

Section: Introductionmentioning

confidence: 99%

Islanding detection based on asymmetric tripping of feeder circuit breaker in ungrounded power distribution system

Shang

Shi

Xiang

2015

J. Mod. Power Syst. Clean Energy

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An islanding detection method in ungrounded power distribution system based on single-phase operating mechanisms of the circuit breaker (CB) is proposed in this paper. When CB opens three phase circuits to form an island, one phase circuit is opened firstly and the other two phase circuits are opened secondly after certain duration. During the period when only one phase circuit is opened, negative sequence voltage with certain duration is obtained at DG side because of the asymmetric operation of the system. After all three phase circuits are opened, the voltage variation direction of the two phases that are secondly disconnected from the grid follows the voltage variation direction of the firstly disconnected phase. Based on the above voltage characteristics, an islanding detection scheme is proposed to identify genuine islanding from system disturbances. The performance of the proposed scheme is tested in PSCAD/EMTDC using a 10 kV distribution network with synchronous DG interconnection. Simulation results demonstrate the proposed method is effective and reliable to detect islanding formation.

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“…In order to prevent islanding, a lot of anti-islanding methods have been studied [4,5,6,7,8,9]. Among them, passive methods depends on the voltage monitoring only at point of common coupling to detect islanding [4,5], while active methods inject active signals intentionally in the PV inverter output to detect islanding [6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

An improved active frequency drift anti-islanding method for multiple PV micro-inverter systems

2014

IEICE Electron. Express

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Islanding phenomenon of Photovoltaic (PV) system should be prevented because it causes a safety problem to utility service personnel and power supply facilities. Until now, various antiislanding methods have been proposed. However, these are mostly focus on the islanding prevention method for single PV system. Recently, PV system using micro-inverters are widely disseminated in the field. Accordingly, an islanding issue for multiple PV microinverter systems has been paid attention due to their interaction not to detect islanding, even though the single micro-inverter unit can prevent islanding when the single unit is only tested. This paper presents an improved active frequency drift (AFD) anti-islanding method for multiple PV micro-inverter systems. The proposed method injects every half-line cycle asymmetrical signals and uses the correlation between the injected asymmetrical signal and the corresponding half line cycle. The proposed method is verified by using PSIM simulation, compared with the conventional AFD method. It shows that the proposed method is highly effective to detect islanding even under multiple micro-inverter system while the conventional one doesn't detect islanding.

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An Islanding Detection Method for Distributed Generations Using Voltage Unbalance and Total Harmonic Distortion of Current

Cited by 493 publications

References 1 publication

Investigating the Power Quality of an Electrical Distribution System Stressed by Non-Linear Domestic Appliances

Investigating the Power Quality of an Electrical Distribution System Stressed by Non-Linear Domestic Appliances

Islanding detection based on asymmetric tripping of feeder circuit breaker in ungrounded power distribution system

An improved active frequency drift anti-islanding method for multiple PV micro-inverter systems

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