Abstract: After capacity expansion, photovoltaic (PV) power plants often incorporate multi-source heterogeneous inverters, making traditional power dispatch strategies unable to simultaneously achieve fast response, high accuracy, and balanced equipment wear. To address this, this paper proposes a dynamic-score-based active power control method. First, a dynamic scoring model is developed by integrating inverter response time, efficiency, and health status. Inverters are then grouped according to their scores, and active power is allocated proportionally. Once the system reaches steady state, a power redistribution mechanism is activated to smoothly shift load among inverters, achieving wear leveling. Simulation and field application results demonstrate that the proposed method effectively shortens the active power regulation response time, improves control accuracy, balances equipment degradation, and extends inverter service life.