摘要
为提高电力系统暂态稳定性评估效率,基于奇异摄动理论和非线性系统稳定域边界二次近似方法,通过将非线性系统的稳定裕度指标在奇异摄动参数处进行高阶泰勒展开,提出一种基于降阶模型的非线性系统稳定性快速评估方法,并给出最小阶降阶模型的选取依据。最后,以单机交流供电电力系统和四机直流供电电力系统的暂态稳定性评估为例,通过与传统非线性系统稳定域边界二次近似方法进行比对,验证了所提出的稳定性快速评估方法可在保证评估精度的前提下,有效提高计算效率。
To improve the assessment efficiency of power system transient stability, a new fast assessment method of nonlinear system stability was proposed using the high-order Taylor series expansion of stability margin indexofthe nonlinear system, based on the singular perturbation theory, reduced model and quadratic approximation method of stability region boundary of nonlinear systems. The transient stability assessment of two typical power systems powered by single and four generators respectively demonstrate the proposed method has higher efficiency than the conventional quadratic approximation method of stability region boundary of nonlinear systems, and the same precision as the conventional method.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第19期126-134,11,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(50977090
51077130)
国家重点基础研究发展计划项目(973项目)(2012CB215103)~~
关键词
非线性多时间尺度系统
降阶模型
稳定性
快速评估
稳定域边界二次近似
电力系统
nonlinear multi-time scale systems
reduced model
stability
fast assessment
quadratic approximation of stability region boundary
power system
