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

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DOI: 10.4236/sgre.2014.56014    3,043 Downloads   4,128 Views   Citations

ABSTRACT

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.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Mustafa Bhutto, G. , Ali, E. , Kumar, J. and Bhayo, M. (2014) Islanding Protection and Islanding Detection in Low Voltage CIGRE Distribution Network with Distributed Generations. Smart Grid and Renewable Energy, 5, 152-159. doi: 10.4236/sgre.2014.56014.

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