沽源风电场串补输电系统次同步谐振典型事件及影响因素分析  

Practical SSR Incidence and Influencing Factor Analysis of DFIG-based Series-compensated Transmission System in Guyuan Farms

作　　者：董晓亮[1] 田旭[2] 张勇 宋佳 

机构地区：[1]国家电网公司华北分部,北京100053 [2]中国矿业大学(北京)机电与信息工程学院,北京100083 [3]吉林省吉林市供电公司,吉林130021

出　　处：《高电压技术》2017年第1期321-328,共8页High Voltage Engineering

摘　　要：针对沽源风电场串补输电系统的次同步谐振(SSR)特性进行分析。首先介绍了沽源风电场串补输电系统及其SSR事件,通过典型振荡现象的分析和各次振荡事件的统计,总结得到该系统SSR问题的特性以及主要影响因素。然后,建立沽源风电场串补系统的等效模型,利用PSCAD/EMTDC对典型事件进行仿真复现,结合特征值分析,对SSR机理进行进一步的解释。接着,利用特征值灵敏度分析法确定了风力机全运行区域内影响SSR特性的主导因素,并对其影响大小进行量化分析,并且进一步区分影响稳定性和谐振频率的主导因素。发现转速的变化对稳定性的影响最大,其次为:输出功率,风力机台数,串补度、转子侧内环电流比例系数。影响谐振频率的主导因素是串补度,其次为风力机台数、转速、输出功率。最后,根据现场数据和理论分析结果,为风电场的安全稳定运行提出合理化建议。We have analyzed subsynchronous resonance （SSR） characteristics of DFIG-based series-compensated trans- mission system in Guyuan. Firstly, DFIG-based series-compensated transmission system in Guyuan and the SSR incidence are introduced. The characteristics and main influencing factors are summarized through the analysis and statis- tics of typical oscillation phenomenon. Then, an equivalent model of the wind farm series-compensated transmission system is built in PSCAD/EMTDC and the incidence is reproduced. The mechanism of SSR is explained through eigen- value analysis. Thereby, dominant influencing factors are determined by eigenvalue sensitivity analysis and influencing level is analyzed quantitatively. The dominant factors influencing stability and resonant frequency are distinguished. The dominant factors influencing stability are： rotor speed, output power, DFIG number, compensation level, and RSC current controller gain. Factors that influencing resonant frequency are compensation level, DFIG number, rotor speed, and output power. In the end, suggestions for safe operation are given according to the field data and theoretical analysis.

关 键 词：双馈风力机 固定串补 次同步谐振 灵敏度分析 影响因素 

分 类 号：TM614[电气工程—电力系统及自动化]