| Abstract |
This paper presents the implementation of a strategy for low voltage ride-through for a distributed energy resource (DER) complying with IEEE 1547-2018 standard. The detection of balanced and unbalanced grid voltage sags are presented and the controller acts on the system according to the standard requirements. As the main contribution, this paper presents a method to track the RMS voltage at the point of common connection (PCC) by a Kalman filter. The results are compared with detection methods based on the Positive Sequence and RMS voltage detection of each phase. As result, the method for LVRT detection based on the Kalman filter has better performance, considering its fast voltage estimation that contributes to early detection of the occurrences of voltage sags that are within the region for LVRT. |
