Anti-Islanding Detection Algorithm for Grid Tied Photo Voltaic Systems with modified DG Interface Controller

SEEE DIGIBOOK ON ENGINEERING & TECHNOLOGY, VOL. 01, FEB 2018 PP.(184-189)
Abstract– The development in new technology like fuel cell, wind turbine, photovoltaic and new innovation in power electronics forces the power industry to provide more importance to distributed generations. Hence distributed generation (DG) has become an inseparable part in power system. Islanding is the condition that occurs when a portion of the distribution system becomes electrically isolated from the remainder of the power system yet continues to be energized by distributed generators. It can be dangerous to grid workers who may not realize this condition. The effects of islanding are low power quality, equipment damage, and personnel safety hazards. To avoid this situation, DG should detect an islanding condition and stop producing the power immediately. In this paper, the performance of various anti-islanding (AI) protection relays is analysed when the islanding condition of Grid-Tied PV (photovoltaic) system appears at the Point of Common Coupling (PCC) between the PV system and the power grid. The main purpose of this work is to detect the presence of island by determining the performance of several AI prevention schemes, by monitoring the detection time of the islanding condition through different methods. Additionally, it provides significant reduction in the NDZ of the DC-Link voltage using data detrending algorithm implemented in MATLAB/Simulink on a 100 kW PV grid-DG model.
Index Terms – DC-Link voltage; distributed generation; islanding detection; non-detection zone; photovoltaic; under/over voltage.
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J. KAVINILAVU1, Dr.S. CHITRA1, Dr.N. DEVARAJAN2
1 Government college of Technology,
Coimbatore, India
2 Sri Ramakrishna Institute of Technology,
Coimbatore, India
kavinilavuj05@gmail.com,
eeechitra@gct.ac.in,
dean.research@srit.org

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