Abstract
This paper presents the development, implementation and performances of a digital multi-relay protection for micro-grids. The developed digital protection is based on extracting the second level high frequency sub-bands present in d-q-axis components of the currents flowing through each bus of a micro-grid. The desired frequency sub-bands are extracted using the wavelet packet transform (WPT), and are considered signatures for identifying fault currents and fault locations. The protective functions in the developed digital multi-relay protection are structured without adaptive features or relay-to-relay communications. This structure is established to accomplish fast response, simple implementation, independent functions, and minor sensitivity to levels of fault currents. The digital multi-relay protection is implemented for experimental testing on a laboratory micro-grid for various operating conditions. Experimental performances demonstrate high reliability, accuracy, and speed, along with negligible sensitivity to parameters of protected components and mode of operating the micro-grid.
| Original language | English |
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| Title of host publication | 2012 IEEE Industry Applications Society Annual Meeting, IAS 2012 |
| DOIs | |
| Publication status | Published - 2012 |
| Event | 2012 IEEE Industry Applications Society Annual Meeting, IAS 2012 - Las Vegas, NV, United States Duration: Oct 7 2012 → Oct 11 2012 |
Other
| Other | 2012 IEEE Industry Applications Society Annual Meeting, IAS 2012 |
|---|---|
| Country | United States |
| City | Las Vegas, NV |
| Period | 10/7/12 → 10/11/12 |
Keywords
- Digital protective relays
- micro-grids
- power system protection
- real-time systems
- wavelet transforms
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering