Quantitative frequency security assessment method considering cumulative effect and its applications in frequency control

作     者：Zhang, Hengxu Li, Changgang Liu, Yutian 

作者机构：Shandong Univ Key Lab Power Syst Intelligent Dispatch & Control Minist Educ Jinan 250061 Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS》 (国际电力与能源系统杂志)

年 卷 期：2015年第65卷

页      面：12-20页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National High Technology Research and Development Program of China [2011AA05A118] Major Projects on Planning and Operation Control of Large Scale Grid of the State Grid Corporation of China [SGCC-MPLG020-2012] Taishan Scholar Program of Shandong Province 

主　　题：Frequency deviation Frequency control Frequency security assessment (FSA) Underfrequency load shedding Wind farm 

摘      要：Rising wind and solar generation penetrations change power system frequency behaviors significantly. Large disturbances may cause serious frequency deviations and lead to stability problems. It is important to provide a comprehensive and quantitative frequency security assessment (FSA) method for situation awareness and control decision-making in power systems. In this paper, a new FSA approach considering cumulative effect of frequency deviations on power equipment is proposed to quantitatively assess the impact of power system frequency deviations. It provides a unified expression of frequency security index (FSI) and has advantages of linearity, smoothness and monotonicity over existing methods. The FSI is calculated based on frequency trajectory obtained from wide-area measurement system (WAMS) or numerical simulations by which wind and solar generation can be taken into account. With sensitivity analysis of frequency security margin, the proposed FSA method has been applied to critical disturbance and critical control amount searching with frequency security constraints. The searching procedure is easy to implement, and computationally efficient with good convergence. The feasibility of the proposed FSA method and its applications are demonstrated on the 10-machine 39-bus New England test system. (C) 2014 Elsevier Ltd. All rights reserved.