摘要
模态级数法是一种新的用于反映非线性系统动态特性的方法。该方法基于泰勒级数,可以得到非线性系统零输入响应的封闭解,其结果既提供了系统特征信息,又便于分析系统非线性模态交互作用,却不需要非线性变换,适合于电力系统的动态行为分析。本文把模态级数法应用于带功率调制的HVDC/AC系统。运用模态级数法得到交直流系统动态方程的封闭解以及系统的频域信息,由此可以分析系统故障后的稳定性以及功率调制对系统稳定的影响。以一个三机交直流系统为例,运用模态级数法分析了其非线性动态特性。
In this paper a new method for studying the nonlinear dynamic behavior is introduced and extended to HVDC/AC power systems with DC power modulation. Based on Taylor series expansion and nonlinear transformation of the state space, the method is able to obtain a closed form solution and the frequencydomain information. The nonlinear behavior of the power system can be analyzed using modal series method. Then it is applied to a three-generator HVDC/AC power system with power modulation and analysis is made to show the effect of the power modulation.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2006年第1期1-4,9,共5页
Proceedings of the CSU-EPSA
基金
国家重点基础研究项目(2004CB217907)
国家自然科学基金项目(50377017)
