Islanding Detection for Distributed Generation

Ding, Xiaohua; Crossley, P.A.; Morrow, D.J.

doi:10.5370/jeet.2007.2.1.019

Cited by 31 publications

(19 citation statements)

References 3 publications

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“…Conversely, they can be over sensitive to large disturbances in the grid, compounding the network problem. The sensitivity of islanding detection can be enhanced by measuring the voltage angle difference between the island and the main grid, therefore reducing the chance of false detection [12]. Moreover, as mentioned previously, with synchrophasor measurements it is possible to calculate the equivalent short circuit impedance in real-time as an alternative approach for islanding detection, as the value could vary greatly before and after the network separation [13].…”

Section: Microgrid Islanding and Resynchronisationmentioning

confidence: 99%

Synchrophasor applications for distributed energy resource connection and efficient grid operation

Wang¹,

Wilson²,

Venkata³

et al. 2012

CIRED 2012 Workshop: Integration of Renewables Into the Distribution Grid

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Section: Microgrid Islanding and Resynchronisationmentioning

confidence: 99%

Synchrophasor applications for distributed energy resource connection and efficient grid operation

Wang¹,

Wilson²,

Venkata³

et al. 2012

CIRED 2012 Workshop: Integration of Renewables Into the Distribution Grid

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“…Islanding is detected if any difference in the voltage phase angles of the two grid sides exists. Further details on this method, its validation, and comparison with the other methods are presented in [5,24].…”

Section: Control Strategy For the Islanding Operation Of The Cigre Nementioning

confidence: 99%

“…power networks in case of significant penetration of DG units if the islanding-related problems are tackled properly. Serious issues with islanding are the voltage and the frequency deviations, island detection (ID), load control, and protection [4,5]. With significant penetration of DG units, islanding operation of a local Micro Grid (MG) can be a viable solution if the voltage and frequency of the islanded portion of the power network is controlled locally.…”

Section: Introductionmentioning

confidence: 99%

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Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

2017

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Abstract:In islanding, a portion of the power network, comprised of the loads and distributed generation (DG) units, is isolated from the rest of the power grid and forms a micro grid (MG). In this condition, it becomes essential for the islanded MG to operate in a stable and controlled manner by providing ancillary services. When the MG is cut off from the main grid, the islanding must be detected by the DG units. In this condition it is essential that one of the controllers should be switched to the voltage-frequency (VF) control mode. In islanding, the network loses it slack reference and this reference is established by a VF controller. The voltage and the frequency of the islanded MG deviate when disconnected from the transmission grid and these deviations are caused by the load-generation imbalance. The voltage and the frequency of the islanded MG can be restored to the permissible limits if the desired/exceeded amount of active and reactive power is injected/absorbed by the locally available sources in islanded MG. This paper proposes a control strategy which can compensate the voltage and the frequency deviations in the islanded portion of the International Council on Large Electric Systems (CIGRE) low voltage distribution network by using advanced power electronics devices such as STATCOMs) for Photovoltaic (PV) Units and Battery Energy Storage Systems (BESS) STATCOMs (for battery units). The selection of the VF controller for the most suitable DG unit of this test network is also presented in this paper, and the effectiveness of the controllers is verified by presenting simulation results using DIgSILENT (DIgSILENT GmbH, Gomaringen, Germany) power factory software version 15.0.

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“…The main passive techniques used for islanding detection include under/over frequency, vector shift, Rate Of Change Of Frequency (ROCOF) [7] [8], Under/Over Voltage, rate of change of voltage and power factor [9] etc. The main active techniques include reactive power Error Export Detection (REED) [10], fault level monitoring [11], and system impedance monitoring [5].…”

Section: Introductionmentioning

confidence: 99%

Islanding Protection and Islanding Detection in Low Voltage CIGRE Distribution Network with Distributed Generations

Bhutto¹,

Ali²,

Kumar³

et al. 2014

SGRE

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The Power Quality (PQ), security, reliability etc., are the prime objectives of the power system. The protection is developed in such a way that it should be selective, fast, reliable and the cost effective. The study about the islanding protection in Low Voltage (LV) CIGRE distribution and networks like this has been proposed in this paper. This is achieved by developing the protection against the short circuit faults which might appear at the Medium Voltage (MV) bus. The protection of the network with significant penetration of the Distributed Generations (DGs) is a complicated process. The DG units which are directly connected to the grid such as synchronous or induction generators contribute large short power, whereas the DG units which are connected to the grid via inverters carry small amount of the short circuit power. This creates the problems in the protection of the network. If the proper protection coordination measures have not been taken, it might cause the mal-function of the protection devices which put the portion of the power network into the security threats. The selection of the islanding protection devices in this paper is made to protect the network against bi-directional currents at the time of short circuit fault. The LV CIGRE distribution network will enter into islanding if a fault is cleared at the MV bus by the proposed islanding protection devices. It is therefore, essential to detect the islanding in the CIGRE power network. The detection of the island in this network is another major objective of this paper. The detection of the island is proposed by using the technique which is based on the voltage phase angle difference. The simulations are carried out by using DIgSILENT power factory software version 15.0.

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Islanding Detection for Distributed Generation

Cited by 31 publications

References 3 publications

Synchrophasor applications for distributed energy resource connection and efficient grid operation

Synchrophasor applications for distributed energy resource connection and efficient grid operation

Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

Islanding Protection and Islanding Detection in Low Voltage CIGRE Distribution Network with Distributed Generations

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