  Algorithms that adjust the reactive power injection of converter-connected
RES to minimize losses may compromise the converters' fault-ride-through
capability. This can become crucial for the reliable operation of the
distribution grids, as they could lose valuable resources to support grid
voltage at the time they need them the most. This paper explores how two novel
loss-minimizing algorithms can both achieve high reduction of the system losses
during normal operation and remain connected to support the voltage during
faults. The algorithms we propose are decentralized and model-free: they
require no communication and no knowledge of the grid topology or the grid
location of the converters. Using local information, they control the reactive
power injection to minimize the system losses. In this paper, we extend these
algorithms to ensure the low voltage ride through (LVRT) capability of the
converters, and we integrate them with state-of-the-art Wavelet-CNN-LSTM RES
forecasting methods that enhance their performance. We perform extensive
simulations on the real-time digital simulation (RTDS) platform, where we
demonstrate that the algorithms we propose can achieve a substantial decrease
in power losses while remaining compliant with the grid codes for LVRT makes
them suitable for the implementation across the distribution system.
