基于频率扫描法与特征值法的交流系统串补引起的次同步谐振分析  

Analysis on Subsynchronous Resonance Caused by Series Compensation in AC System Based on Frequency-Scanning and Eigenvalue

作　　者：李海峰 刘崇茹 韩民晓 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2012年第5期107-112,共6页Power System Technology

基　　金：国家自然科学基金项目(50807013);中央高校基本科研业务费专项资金资助项目(10ZG02);高等学校学科创新引智计划项目(B08013)~~

摘　　要：分析交流系统串补引起的次同步谐振问题时,为实现频率扫描法与特征值法的优势互补,提出结合2种算法进行分析的混合方法。首先使用频率扫描法确定部分主振频率,计算对应的串补度;然后采用特征值法绘制串补度变化时的模态阻尼曲线,找出其余主振频率,确定安全补偿度。该方法克服了单独使用频率扫描法精度不足的缺点,同时减少了单独使用特征值法的计算量。算例结果验证了该方法的有效性。During the analysis on subsynchronous resonance （SSR） caused by series compensation in AC system, to implement the complementation of superiors of frequency scanning method and eigenvalue method a hybrid analysis method combining the two algorithms is proposed. Firstly, part of main oscillation frequencies are determined by frequency scanning method and corresponding degrees of compensation are calculated; then the modal damping curve is plotted byeigenvalue method under the variation of compensation degree, thus rest of main oscillation frequencies can be found to determine secure degrees of compensation. The proposed method can remedy the defect of dissatisfied accuracy by using frequency-scanning method individually, and the calculation burden of using eigenvalue method individually can be reduced. Effectiveness of the proposed method is verified by case calculation results.

关 键 词：次同步振荡 次同步谐振 模态阻尼 轴系固有模 态频率 

分 类 号：TM744[电气工程—电力系统及自动化]