需求侧响应(Demand Response，DR)通常由上级(省级)电网组织开展，但缺乏对下级地县级电网实时运行状态的观测能力，灵活性资源(Flexible Resource，FR)按照计划执行可能会引起下级电网的局部安全风险。为避免该问题，提出了一种计及灵活性资源响应量不确定性的多级安全校核与修正方法。首先，对FR响应量不确定性进行概率化建模；其次，结合电压-功率灵敏度与线路传输功率灵敏度，以最大化满足上级电网响应需求为目标，构建基于机会约束的多级安全校核与修正模型，通过量化FR响应量不确定性，在保障下级电网运行安全的前提下，能够实现上级电网需求的最大化满足；最后，基于IEEE 33节点配电系统的仿真验证了所提方法的有效性。

Demand response (DR) is typically organized by higher-level (provincial) power grids, but these lack the capability to monitor the real-time operational status of lower-level county-level grids. Executing flexible resources according to plans may trigger localized security risks in subordinate grids. To address this issue, a multi-level security verification and correction method that accounts for the uncertainty in flexible resource (FR) responses is proposed. First, probabilistic modeling is applied to capture FR response uncertainty. Second, integrating voltage-power sensitivity and line transmission power sensitivity, a multi-level safety verification and correction model based on opportunity constraints is constructed. This model aims to maximize compliance with the response plan of higher-level grid. By fully accounting for response uncertainty, it ensures the operational safety of lower-level grids while maximizing the fulfillment of higher-level grid requirements. Finally, the validity of the proposed method is verified by simulations on IEEE 33-node distribution system.