Abstract:
With the growing of the “Microgrid” concept in
the modern world, new protection systems are required. This
protection system should be handled the all configurations and
all conditions of the microgrids and suitable for small scale less
expensive microgrids. This paper proposed a reliable, online,
adaptive and accurate method for microgrid protection by
using fault current level of the system considering the modes
of operation, dynamic nature of the Distributed Generators
(DGs) and different types of the loads. This is an adaptive
protection scheme for a microgrid; where a Microgrid Central
Protection Unit (CPU) monitors the microgrid continuously using
a communication medium, whenever fault is detected in the
network, the relay settings of the microgrid are altered adaptively
based on instructions issued by CPU. This method can be
operated accurately by estimation fault current level of the
Microgrid at the instant and using that relay tripping current
at any disturbance and can be calculated at any condition. By
using this protection strategy, can create self-operated microgrid
and can avoid human interference to the microgrid operation,
design and calculation.
Citation:
Peiris, W.L.T., Eranga, W.H., Hemapala, K.T.M.U., & Prasad, W.D. (2018). An adaptive protection scheme for small scale microgrids based on fault current level. In R. Samarasinghe & S. Abeygunawardana (Eds.), Proceedings of 2nd International Conference on Electrical Engineering 2018 (pp. 64-70). Institute of Electrical and Electronics Engineers, Inc. https://ieeexplore.ieee.org/xpl/conhome/8528200/proceeding