1 research outputs found
Dynamic State Estimation for Load Bus Protection on Inverter-Interfaced Microgrids
Inverter-interfaced microgrids results in challenges when designing
protection systems. Traditional time-overcurrent, admittance, and differential
protection methods are unsuitable on account of lack of fault current,
excessively short lines, or a prohibitive number of protective devices needing
to be installed. Current practice is to force all inverters to shut down during
fault conditions, weakening resilience and reducing reliability. Dynamic state
estimation (DSE), which has been explored for both line protection and load bus
protection before, is a potential solution to these challenges to create widely
utilizable, highly reliable protection systems. However, it has only been
tested for load protection with ideal voltage sources, which do not capture the
short-circuit behavior of inverter-interfaced generation, notably low fault
current and unbalanced output voltage. This paper aims to extend the
state-of-the-art on DSE load protection: the performance of DSE during
short-circuit conditions with a grid-forming inverter with current-limiting
behavior during fault conditions is investigated.Comment: 5 pages. 3 figures. 1 table