电压暂降是工业园区中严重的电能质量问题之一。为了对工业园区内电压暂降事件的严重程度进行合理准确的评估，提出一种基于敏感设备耐受能力的工业园区电压暂降评估方法。首先考虑电压暂降严重程度指标S_e存在的评估缺陷，对S_e进行改进，提出改进的电压暂降严重程度指标S_en。根据给出的基于耐受曲线的设备暂降耐受因子G_i和基于设备电源相的暂降类型影响因子y_n，提出不同敏感设备的电压暂降严重程度指标Q_i，结合上述指标提出工业园区的电压暂降严重程度综合指标K。算例验证了所改进的电压暂降严重程度指标S_en可以克服传统的S_e评估缺陷，指标Q_i和K可以合理地对工业园区进行电压暂降严重程度评估。

Voltage sag is one of the serious power quality issues in industrial parks. In order to make a reasonable and accurate assessment of the severity of voltage sag events in industrial parks, a voltage sag assessment method for industrial parks based on the tolerance of sensitive equipment was proposed. Firstly, considering the evaluation deficiencies of the severity index for voltage sag S_e, S_e of was improved and the improved voltage sag severity index S_en was proposed. Based on the given equipment sag tolerance factor G_i based on the tolerance curve and the sag type influence factor y_n based on the equipment power phase, the voltage sag severity indicators for different sensitive equipment Q_i was proposed, and a comprehensive index of voltage sag severity for industrial parks K was proposed by combining the above indicators. The example verifies that S_en can overcome the evaluation defect of traditional S_e index, and the indices Q_i and K can reasonably evaluate the severity of voltage sag in industrial parks.