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Adaptive Relay in Microgrid - Hardware Implementation with User Interface

Vinod, V and Shenoy, UJ (2018) Adaptive Relay in Microgrid - Hardware Implementation with User Interface. In: 20th National Power Systems Conference, NPSC 2018, 14 - 16 December 2018, Tiruchirappalli.

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Official URL: https://doi.org/10.1109/NPSC.2018.8771847


The increase in percentage-wise proportion of Distributed Generations is a great boon to the end consumers. However, such developments lead to major protection challenges in distribution systems. This paper describes the hardware implementation of an Interface relay, which is connected at the point of common coupling(PCC) in the micro-grid. The work includes the development of a Graphical User Interface (GUI) for the effective utilization of the proposed relay. The various functions implemented in the Interface relay are Synchronization, Islanding and bidirectional over current protection. The program is coded in the micro-controller using embedded C software. Phase locked loops (PLL) with moving average filter algorithm is used in the relay to attenuate the 100Hz ripples introduced during unbalance in the supply voltage. In the case of bidirectional over current protection, different relay operating time has been set for faults occurring in forward and reverse direction. The proposed Interface relay implemented has been rigorously tested to validate the performance based on simulation of the test signals using National Instruments waveform generation module and using Lab-View software. The test results clearly indicate the successful performance of the proposed scheme for micro-grids.

Item Type: Conference Paper
Publication: 2018 20th National Power Systems Conference, NPSC 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords: Distributed power generation; Electric circuit breakers; Electric fault currents; Graphical user interfaces; Locks (fasteners); Microcontrollers; Phase locked loops; Software testing; Synchronization, Distribution systems; Graphical user interfaces (GUI); Hardware implementations; Islanding; Moving average filter; National Instruments; Phase Locked Loop (PLL); Point of common coupling, C (programming language)
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 01 Aug 2022 09:13
Last Modified: 01 Aug 2022 09:13
URI: https://eprints.iisc.ac.in/id/eprint/75103

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