中文摘要：

灵活性是衡量电力系统应对不确定性能力的重要指标。针对可再生能源发电所带来的功率不确定性,以灵活性特点分析为基础,提出衡量系统电源灵活性的数学模型及灵活性综合评价体系：电源灵活性模型考虑了可再生能源出力的最大突变量,并将约束条件细分为传统约束和灵活性资源约束2个方面;灵活性综合评价体系中,依据控制手段和研究对象不同,建立灵活性评价表,反映电力系统运行时的灵活性状态、变化及趋势,固有灵活性指标可比较不同运行状态和不同电力系统之间的灵活性。算例分析验证了该评价体系的有效性。

英文摘要：

Flexibility is an important index to evaluate the ability of power system against the uncertainty. Aiming at the uncertainty caused by the renewable energy and based on the characteristic analysis of flexibility,a mathematic model with a comprehensive evaluation system is proposed to evaluate the source flexibility of power system. The source flexibility model considers the maximum mutation of renewable energy generation and divides the constraints into traditional constraints and source flexibility constraints. According to different control methods and objects,a flexibility evaluation table is built in the evaluation system to reflect the state,variation and trend of flexibility during power system operation. The inherent flexibility index is used to compare the flexibility among different operating conditions or power systems. Case analysis verifies the effectiveness of the proposed evaluation system.