The large-scale integration of high proportions of renewable energy into power systems results in systems with low inertia and weak damping characteristics. Grid-forming converters can provide active frequency and voltage support capabilities by simulating the operational characteristics of synchronous generators. However, unlike synchronous generators, the overcurrent and overheating capabilities of power electronic devices in converters are limited, so they must have current-limiting capabilities. Currently, grid-forming converters typically use active synchronous control, which can lead to the system being unable to successfully traverse faults when the fault duration is too long, resulting in significant losses and excessive reactive power. A low-voltage ride-through stability control strategy based on reactive synchronous control is proposed. During voltage sags, reactive synchronous control is triggered to ensure that grid-forming converters maintain a stable equilibrium operating point during low-voltage ride-through, unconstrained by the traditional maximum fault duration, thereby reducing the time required to restore stability after a fault. Finally, the correctness of the proposed algorithm is verified through experiments.