摘要
针对传统小扰动稳定域未考虑系统可能出现的持续振荡和阻尼比过低的情况,提出一种基于保护映射(Guardian map)的改进小扰动稳定域计算方法。首先,借助映射理论将系统从改进小扰动稳定域映射到负半平面上,并通过直和运算构成保护映射,然后利用能够精确求解Hurwitz矩阵稳定域的保护映射方法准确快速地求解出改进小扰动稳定域的边界。IEEE 4机11节点系统仿真结果表明:基于保护映射的电力系统改进小扰动稳定域描绘方法具有较高的精确度和有效性。最后,进一步分析发电机励磁系统参数对改进小扰动稳定域的影响,对指导系统调度运行,预防系统出现小扰动失稳具有参考意义。
A Guardian map based improved small signal stability region （ISSSR） calculation method was proposed addressing the situation that sustained oscillation and low damping ratio was not concerned in traditional small signal stability region. First, to get the border of ISSSR, mapping theory was utilized to map the ISSSR to negative half-plane. Then, direct sum was used to form guardian map which can calculate the stability region of Hurwitz matrix so that border of ISSSR can be get precisely. Simulation results of IEEE 4 generator 11 nodes system illustrate that guardian map based ISSSR calculation method has high accuracy and efficiency. At last, the effect of excitation system parameter＇s change to ISSSR was analyzed to guide the operation of power system, preventing the appearance of small signal instability.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第28期4897-4905,共9页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973项目)(2012CB215200)
国家自然科学基金项目(51277193)
中央高校基本科研业务费专项资金项目(2014ZZD02)
教育部留学回国人员科研启动基金资助项目(教外司留[2011]1139号)
河北自然科学基金项目(E2012502034)
北京市科技新星支持计划(Z141101001814012)
北京市优秀人才支持计划(2013B009005000001)
霍英东教育基金(141057)~~
关键词
低频振荡
保护映射
改进小扰动稳定域
励磁参数
low-frequency oscillations
Guardian map
improved small signal stability region （ISSSR）
excitation system parameter
