2种实际约束下的电力系统时滞稳定裕度  

Method of Determining Power System Delay Margins with Considering Two Practical Constraints

作　　者：贾宏杰[1] 余晓丹[1] 

机构地区：[1]天津大学电力系统仿真控制教育部重点实验室,天津市300072

出　　处：《电力系统自动化》2008年第9期7-10,19,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217904);国家自然科学基金资助项目(50595413;50707019);全国优秀博士学位论文作者资助项目(200439);新世纪优秀人才支持计划;霍英东优选资助课题(104019);天津市科技发展计划项目(06TXTJJC13700)~~

摘　　要：将满足如下2种约束时电力系统所能承受的最大时滞称为实用时滞稳定裕度(PDM):全部特征值实部小于给定值;全部特征值对应的阻尼因子大于给定常数。给出了一种求解电力系统PDM的简便方法,通过在有限区间内追踪一组复矩阵的特征轨迹以确定上述2种约束下的系统关键特征值及其PDM。最后借助单机无穷大系统和WSCC-3机9节点系统,对单一和双时滞情况下的系统PDM进行了分析,并与线性矩阵不等式(LMI)方法进行了比较,验证了该方法的有效性和计算效率。Practical delay margin （PDM） is defined as the maximum time delay that system satisfies the following two constraints： real parts of all the eigenvalues are smaller than given values, and all the damping factors are larger than given values. A simple approach to determine PDM is presented. Critical eigenvalue and the corresponding PDM are determined by tracing eigenvalue locus of a complex matrix in a finite interval. Compared with linear matrix inequality （LMI） approach, the proposed method can identify the exact delay margin without any conservativeness and with a small computation burden. Singlemachine infinite-bus and WSCC 3-generator-9-bus systems are employed to validate the effectiveness of the proposed method.

关 键 词：小扰动稳定 实用时滞稳定裕度 时滞动力系统 电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]