基于戴维南等值模型的静稳极限在线监视.pdfVIP

学兔兔 第52卷 第16期 电测与仪表 VOI．52 No．16 2015年 8月25日 Electrical Measurement Instrumentation Aug．25。2015 基于戴维南等值模型的静稳极限在线监视 常鲜戎 ，王建文 ，崔赵俊 (1．华北电力大学电气与电子工程学院，河北保定071003；2．三亚供电公司，海南三亚572000) 摘要：基于实时测量信息的戴维南等值方法，为多机系统输电通道静稳极限在线监视提供了新的研究思路。本 文结合电力系统实际运行状态的特点，通过分析戴维南等值方法的适用条件，提出一种内电势相角可变的戴维 南等值模型，并使用具有可变遗忘因子的改进递推最小二乘法在线辨识戴维南等值参数，从而将多机系统等值 成双机系统；利用等值后的双机系统快速求取输电通道的静稳极限；借助输电通道静稳极限的求取思路，文中 也给出了在线监视多机系统静态稳定水平分布的方法。对IEEE39节点系统进行仿真，仿真结果表明本文计 算方法能够较好地辨识戴维南等值参数，可有效估计输电通道的静态稳定性。 关键词：戴维南等值方法；输电通道；最小二乘法；静稳极限 中图分类号：TM933 文献标识码：B 文章编号：1001—1390(2015)16—0011—06 Static stability limit online monitoring based on Thevenin equivalent model Chang Xianrong ，Wang Jianwen ，Cui Zhaojun (J．School of Electrical and Electronic Engineering，North China Electric Power University， Baoding 071003，Hebei，China．2．Sanya Power Supply Company，Sanya 572000，Hainan，China) Abstract：Thevenin equivalent method based on real time measurement provides a new research approach for static stability limit transmission channel monitoring of multi-machines system．Combining the characteristics of the power system actual motion，through analyzing of the applicable conditions of Thevenin equivalent methods，a kind of Theve— nin equivalent model with variable potential phase angles is proposed in this paper．And recursive least squares with variable forgetting factors are used to get the Thevenin equivalent parameters，thus turning a multi-machines system in— to a dual system．Then，the static stability limit of transmission channel can be obtained quickly with the dual system． Moreover，the distribution of the static stability in the muhi-machines online monitoring system can also be obtained easily with the help of the approach．The paper uses the IEEE39 system as a te