标题：New index for frequency deviation security assessment
作者：Zhang, Hengxu ;Liu, Yutian
作者机构：[Zhang, Hengxu ;Liu, Yutian ] School of Electrical Engineering, Shandong University, Jinan, China
会议名称：2010 9th International Power and Energy Conference, IPEC 2010
会议日期：27 October 2010 through 29 October 2010
来源：2010 9th International Power and Energy Conference, IPEC 2010
关键词：Electric power systems; Frequency deviation; Frequency time response; Security assessment
摘要：Frequency is an important physical quantity reflecting security, stability, and power quality state of power systems. A new security index for transient frequency deviation assessment(FDSA) was presented. A set of two-element limitation tables were used to describe transient frequency deviation acceptability of individual bus or generator, and the security margin index was defined based on the relationship of frequency time response curve and given frequency deviation threshold. Specific treatment was applied to ensure the continuity of the index in the overall frequency changing scope. The characteristics of the proposed security index were analyzed on a provincial power system. Numerical results show that the index's monotonicity and smoothness are very good, and the computation is simple. ©2010 IEEE.