This paper proposes an enhanced control strategy based on a virtual factor to enhance the current-limiting capability of virtual impedance and the power-angle stability of grid-forming photovoltaic systems. Initially, the virtual synchronous generator model is examined to reveal the current-limiting characteristics of virtual impedance during faults. The impact of active power reference and line impedance on system stability is also examined. To balance the current-limiting effect while improving system stability, the strategy dynamically adjusts the active power reference based on the virtual factor, achieving coordinated control of virtual impedance and power output. This approach effectively limits current during faults, maintains power-angle stability, and ensures smooth grid recovery. Compared with conventional approaches, the enhanced strategy not only retains the inherent current-limiting capability of virtual impedance but also suppresses power-angle overshoot, improving the transient stability and dynamic performance of photovoltaic grid-forming systems, offering a promising solution for renewable energy integration.