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中文摘要：
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。
英文摘要：
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.
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同项目期刊论文
Design and experiment of wide area HVDC supplementary damping controller considering time delay in C
A Load Parameter Identification Method Based On Wide Area Trajectory Sensitivity. International Jour
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