Wavelet Based Transient Fault Detection and Analysis of Microgrid Connected Power System

AUTHOR(S):

S. Chandra Shekar, G. Ravi Kumar, Svnl Lalitha

KEYWORDS

Microgrid protection, inverter-interfaced microgrids, islanded microgrid

ABSTRACT

Microgrids comprise low voltage distribution systems with distributed energy resources and controllable loads which can operate connected to the medium voltage grid or islanded in a controlled coordinated way. Microgrids provide clear economic and environmental benefits for end-customers, utilities and society. However, their implementation poses great technical challenges, such as a protection of microgrid. Protection must respond to both utility grid and microgrid faults. If the fault is on the utility grid, the desired response may be to isolate the microgrid from the main utility as rapidly as necessary to protect the microgrid loads. If the fault is within the microgrid, the protection coordinator isolates the smallest possible section of the microgrid to eliminate the fault. In order to cope with the bi-directional energy flow due to large numbers of micro sources new protection schemes are required. This paper presents microgrid protection system using digital relaying and satellite communication is based on wavelet detailed coefficients of Bior 1.5 mother wavelet. The proposed algorithm is proved for the detection, classification of faults on microgrid connected power systems which is almost independent of fault impedance, fault inception angle and fault distance of feeder line.

Cite this paper

S. Chandra Shekar, G. Ravi Kumar, Svnl Lalitha. (2016) Wavelet Based Transient Fault Detection and Analysis of Microgrid Connected Power System. International Journal of Power Systems, 1, 46-52