Abstract
This paper introduces a current differential protection scheme, appropriate for application in medium voltage active distribution systems, where it is desired to keep the greatest possible number of loads and DG units energized during a fault. Conventional two-terminal percentage current differential relays are used to form successive, time-current-coordinated, differential protection zones. Multiple time-delayed differential elements in each protection zone guarantee coordination with the zone’s lateral protection devices, as well as between successive differential protection zones. Sensitive time-delayed differential elements protect against relatively high-resistance faults, while instantaneous differential elements minimize protection speed whenever possible. Additional emergency differential elements deal with post-fault topology changes and breaker failure conditions enhancing the overall scheme's performance. The proposed scheme is applied to a model of real medium voltage distribution system with distributed generation, considering a ring topology operation. A detailed simulation-based study proves the applicability and enhanced performance of the proposed scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 4261-4271 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Power Delivery |
| Volume | 37 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 4 Feb 2022 |
Keywords
- differential protection
- distributed generation
- percentage differential relay
- power distribution systems
- protection coordination
- relays
- circuit faults
- reliability
- current measurement
- topology
- power distibution
- medium voltage
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Dynamic Power Systems Laboratory
Burt, G. (Manager)
Electronic And Electrical EngineeringFacility/equipment: Facility