This study investigates the Crowbar control for a novel dual-rotor doubly-fed generator. First, a mathematical model for the generator is established, and the transient behavior under grid voltage sag is analyzed, exploring the impact caused by voltage dips on the generators’ operation. Next, the study focuses on the Crowbar circuit, analyzing the relationship between the resistance value selection and stator current peaks, and how these factors affect the control performance. Through calculations, the optimal range in resistance values for the Crowbar circuit is determined, ensuring effective suppression of both stator and rotor current fluctuations during grid faults, thereby preventing overcurrent damage to the generators. Finally, simulation results validate the effectiveness of the Crowbar control strategy, demonstrating that the appropriately designed Crowbar circuit can effectively suppress rotor and stator currents during grid faults and ensure the stable operation. This research provides a theoretical foundation and technical support for the operation control over wind turbines during grid faults.