一种评价多个直流换流站系统次同步扭振相互作用的新指标  

A NOVEL INDEX FOR ESTIMATING THE SUBSYNCHRONOUS TORSIONAL INTERACTION OF MULTIPLE CONVERTERS SYSTEMS

作　　者：周长春[1] 徐政[1] 

机构地区：[1]浙江大学电机系,浙江杭州310027

出　　处：《中国电机工程学报》2004年第4期6-11,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50277034);国家重点基础研究专项经费项目(G1998020310)。~~

摘　　要：系统中的汽轮发电机组可以通过网络同时与多个直流换流站发生作用,因此其次同步振荡问题更为复杂。为了研究由多个直流换流站引起的次同步振荡问题,该文将描述发电机组与单个换流站之间扭转作用的机组作用系数(UIF)推广到含有多个直流换流站的系统,提出了综合机组作用系数(CUIF)这一指标,即采用系统中所有直流换流站的机组作用系数之和来量化其与发电机之间的扭振相互作用。并通过系统电气阻尼频率特性的仿真计算证明了综合机组作用系数在各种系统结构下的有效性。In an AC/DC system with multiple converters, the turbine-generator can interact adversely with all the HVDC converters through the electrical system. This makes the analysis of Subsynchronous Oscillation (SSO) more complicat- ed. In order to estimate the potential SSO danger of the multi- converter system, the Unit Interaction Factor (UIF), which has been widely used in the single converter system, is extended to the multi-converter AC/DC scheme in this paper. Furthermore, this paper provides an index named Comprehensive Unit Interaction Factor (CUIF), which is the summation of all the UIFs, to quantify the torsional interactions. Simulations on the electrical damping frequency response characteristics have shown the validity of the CUIF.

关 键 词：汽轮发电机组 复转矩系数法 数学模型 直流换流站系统 频率特性 

分 类 号：TM311[电气工程—电机] TM63