Comparative assessment of four low voltage fault ride through techniques (LVFRT) for wind energy conversion systems (WECSs)

This paper presents a comparative assessment of four low voltage fault ride through (LVFRT) techniques that alleviate the effects power imbalance during AC network faults for source converter (VSC)-based wind energy conversion systems (WECSs). The appraised include software-based coordinated control (CC) technique, commercially available dumping resistor (DR) and two storage techniques, namely, superconductive magnetic (SMES) supercapacitor (SCES). presented are technically viable solutions alleviating impacts on WECS. have previously been assessed by performance-based metrics, whereas this aims to form more comprehensive expanding scope from comparison economic considerations practical limitations. Based qualitative review designs, study quantitative substantiation with time-domain simulations symmetrical asymmetrical faults. is formulated based assessing key performance metrics including grid code compliance, electrical mechanical stress reduction, LVFRT response speed, hardware implementation, system efficiency investment reduction. findings suggest fails highlight potential financial barriers may exist regarding implementation especially storage-based techniques. However, flexibility, benefits increasing feasibility make them preferred option critical WECSs.