交直流并联输电系统的非线性分岔分析  

Analysis of Nonlinear Bifurcation in the AC/DC Paralleled Systems

作　　者：杨秀[1] 王瑞霄[1] 舒海莲[2] 

机构地区：[1]上海电力学院电力与自动化工程学院,上海200090 [2]南京南瑞继保电气有限公司,南京211106

出　　处：《电力系统及其自动化学报》2012年第5期13-18,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金项目(50977055);上海市自然科学基金项目(10dz1203100);上海市教委科研创新重点项目(10ZZ114);教育部重点科技资助项目(210073)

摘　　要：由于高压直流输电HVDC(high voltage direct current)系统的动态特性以及交直流接口方程的非线性,交直流输电系统将具有非常复杂的动态环节与非线性环节,传统的线性分析方法无法准确分析系统的非线性特性。为此,应用分岔理论分析了一个典型交直流输电系统的电压稳定性,将负荷端有功功率、无功功率,原动机功率、HVDC控制参数等作为分岔参数,对整个系统进行了单参数和双参数分岔研究,特别是对HVDC控制系统所引起的分岔变化进行了详细分析。研究表明,在不同运行条件下,系统将出现多种复杂的分岔现象,直流输电系统的控制方式、控制参数及传输功率对系统电压稳定性有显著影响。AC/DC system has more complicated dynamic and nonlinear components for the dynamic features of HVDC controllers and the nonlinear AC/DC interface equation, so traditional linear method can not analyze the nonlinear dynamics. In this paper, bifurcation theory is applied in the analysis of voltage stability for an AC/ DC paralleled system. The load power, generation power and HVDC control parameters are selected as the bifurcation parameters for one-parameter bifurcation analysis and two-parameter bifurcation analysis, and the influence of HVDC control on the bifurcation characteristic is especially studied in detail. Results show that various complicated bifurcations appear in different operation conditions, and HVDC control parameters, control modes and transfered power of HVDC have obvious influence on voltage stability.

关 键 词：交直流并联输电系统 电压稳定 霍普夫分岔 鞍结点分岔 

分 类 号：TM712[电气工程—电力系统及自动化]