Study on the DFIG Low Voltage Traversal System based on Crowbar Circuit and Adaptive Control Strategy

In response to safety issues and practical requirements arising from faults in the doubly-fed induction generator (DFIG) of a wind power generation system, a DFIG low voltage ride-through system based on crowbar circuit and adaptive control strategy is proposed in this article. The study focuses on the application of electromechanical and control strategy technologies after on-site investigation of DFIG, leading to the establishment of a mathematical model for the system. The basic mathematical model of the asynchronous doubly-fed induction generator is modified by incorporating the crowbar circuit and adaptive control strategy. The integrity and accuracy of the system are experimentally validated, addressing issues related to model composition. Subsequently, low voltage ride-through issues are discovered in the later experiments, and excellent results are achieved through the combined effect of the two strategies. This paper addresses the low voltage ride-through problem by incorporating the crowbar circuit for circuit protection and utilizing adaptive control strategy for prediction. The inclusion of the crowbar circuit and adaptive control strategy proves effective in resolving low voltage ride-through issues, holding significant value and meaning in the fields of smart power equipment and intelligent grid integration.