To address the power coordination challenges in industrial terminal distribution systems under the “No Surplus Power to Grid” Mode

this paper proposes a multi-timescale active power optimization strategy. The coupling characteristics of factory generation-load-storage systems and the constraints of local PV consumption are analyzed. Based on this analysis

an optimization model incorporating PV curtailment

energy storage regulation

and flexible load response is developed. The control strategy divides the time domain into second-level

minute-level

and hour-level scales

implementing rapid disturbance suppression

short-term predictive dispatch

and intra-day energy guidance respectively

while establishing a cross-timescale coordination framework. Field validation in a typical industrial park demonstrates that the strategy reduces PV curtailment by 78.5% and increases PV utilization to 93.4%

significantly improving system balance and stability.