A Novel Active Anti-Islanding Protection Scheme for Grid-Interactive Roof-Top Solar PV Systems

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dc.contributor.advisor Pindoriya, Naran M.
dc.contributor.author Varier, Rohith
dc.date.accessioned 2014-09-16T13:33:38Z
dc.date.available 2014-09-16T13:33:38Z
dc.date.issued 2014-06
dc.identifier.citation Varier, Rohith (2014). A Novel Active Anti-Islanding Protection Scheme for Grid-Interactive Roof-Top Solar PV Systems (M. Tech. Dissertations). Indian Institute of Technology, Gandhinagar, pp. 45 (Acc No: T00033) en_US
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1410
dc.description.abstract The rising popularity of renewable resources has resulted in increased penetration levels of Distributed Generation (DG) into the utility grid. Unintentional islanding is one of the most important safety concerns associated with grid connected roof-top solar Photovoltaic (PV) systems. The occurrence of islanding can be fatal to utility workers who may not realize that the local area is still powered and encounter severe electric shock. For this reason, DG must be equipped to detect islanding and isolate itself from the grid immediately, which is commonly referred to as anti-islanding. In conventional systems, there exists a scenario in which exact balance of PV generation and load would result in failure of passive anti-islanding schemes. This problem if rectified by changing the limits of Overvoltage/Undervoltage (OV/UV) and verfrequency/Underfrequency (OF/UF) relay, would result in nuisance tripping which causes further malfunction of the protection system. This thesis work proposes a novel active anti-islanding scheme for inverter fed roof-top solar PV generation connected to Low Tension (LT) distribution grid with unbalanced non-linear loads. The method is based on creating a perturbation in the system using positive feedback and d-q implementation algorithm. The conventional passive schemes fail to detect islanding during power balancing conditions, but the novel active anti-islanding controller ensures that the voltage (or frequency) at the point of common coupling (PCC) is automatically driven beyond the threshold preset values. This proposed scheme has been tested in the presence of non-linear loads and development has found faster islanding detection compared to the existing methods. Further, the islanding conditions are simulated and accurately verified on real time. en_US
dc.description.statementofresponsibility by Rohith Varier
dc.format.extent x, 45 p.; col.; ill; 24 cm. + 1 CD-ROM
dc.language.iso en en_US
dc.publisher Indian Institute of Technology, Gandhinagar en_US
dc.subject Anti-Island en_US
dc.subject Distributed Generation en_US
dc.subject Low Tension en_US
dc.subject Photovoltaic en_US
dc.subject Solar Systems en_US
dc.title A Novel Active Anti-Islanding Protection Scheme for Grid-Interactive Roof-Top Solar PV Systems en_US
dc.type Thesis en_US
dc.contributor.department Electrical Engineering
dc.description.degree M.Tech.

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