基于贡献因子的广域信号优选方法  

Optimal Selection of Wide-area Signal for Power System Damping Controllers Based on Contribution Factors

作　　者：马静 王彤 王上行 王增平 杨奇逊 

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：《中国电机工程学报》2012年第31期174-183,234,共10页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB215200);国家自然科学基金项目(51277193;50907021;50837002);中央高校基本科研业务费专项资金项目(11MG01);教育部留学回国人员科研启动基金资助项目(教外司留[2011]1139号);河北省自然科学基金项目(E2012502034);中国电机工程学会电力青年科技创新项目(电机学[2012]46号);河北省电力公司科技项目(KJ[2012]278-280)~~

摘　　要：从提高反馈信号阻尼效果的角度出发,提出一种基于贡献因子的反馈信号优选方法。首先利用区间扩张理论和摄动理论将各反馈信号对闭环特征根的阻尼效果进行量化,并据此提出贡献因子的概念,然后利用贡献因子之和表征的系统总阻尼效果优选信号。IEEE 4机11节点系统和16机68节点系统的频域和时域仿真结果表明:基于贡献因子优选的反馈信号可协调不同类型的附加控制器,且适用于不同的控制规律;同时,还能够显著提高整个系统的阻尼水平,且控制效果与利用全部信号的控制效果相当,在系统运行方式发生变化的情况下具有一定的鲁棒性。A method of optimal selecting feedback signals based on contribution factor was proposed to increase damping effectiveness of feedback signals. Firstly, the concept of contribution factors Was proposed based on the quantification of shifted effect of different feedback signals using interval extension theory and perturbation theory. The suitable feedback signals were chosen due to the summed up contributions representing the damping of the whole system. The time-domain simulation and frequency-domain simulation of the IEEE 4-machine 11-bus test system and IEEE 16-machine 68-bus test system demonstrate that this selection method can coordinate different types of supplementary controller and can be applied to different control laws. The damping ratio of the whole system is improved using the suitable feedback signals. The damping effectiveness using optimal selected signals is equal to that of overall signals. Meanwhile, robustness of this selectio.n method with respect to the changed operating condition is demonstrated.

关 键 词：低频振荡 区间理论 贡献因子 鲁棒性 

分 类 号：TM77[电气工程—电力系统及自动化]