| Title | CT sizing for generator and transformer protective relays |
| Publication Type | Conference Paper |
| Year of Publication | 2020 |
| Authors | Chowdhury, Ritwik, Finney, Dale, Fischer, Normann, Taylor, Douglas |
| Conference Name | 15th International Conference on Developments in Power System Protection (DPSP 2020) |
| Keywords | BLACK START, compositionality, CT MODEL, CT RATIO, CT SATURATION, DIFFERENTIAL SLOPE, pubcrawl, remanence, Resiliency |
| Abstract | Modern relays often have algorithms that enhance the security of elements that are otherwise susceptible to current transformer (CT) saturation. In this paper, we consider some of the similarities and differences between IEEE and IEC guidance on CT selection. We use CT models verified using high-current tests on a physical CT. Then using these models, we determine CT sizing guidelines and relay settings for a generator and transformer differential relay. Application guidance for generator black start is provided. Considerations such as remanence are discussed. |
| DOI | 10.1049/cp.2020.0143 |
| Citation Key | chowdhury_ct_2020 |
CT sizing for generator and transformer protective relays