中文摘要：

提出一种能够充分考虑故障的基于系统非平衡点处线性化模型的同调识别方法。从理论上推导了电力系统在非平衡点处线性化后的数学模型，得到了电力系统在非平衡点处动态特性的一般规律。在此基础上设计了2种新的电力系统同调识别算法，并在4机11节点系统和IEEE39节点系统中对这2种算法分别进行了测试。与时域暂态仿真结果对比表明，新的同调识别方法结果令人满意。最后，对新方法的特点和优势及其在工程实际中的应用前景进行了探讨。

英文摘要：

A coherence identifying method based on the linearized model for power systems at the non-equlhbrium point is proposed, which can take into account the impact of faults. The theoretical derivation of the linearization at the non-equilibrium point is presented and the general laws of the dynamic characteristics of power systems at the non-equilibrium point are obtained. Two novel coherence identifying algorithms for power systems are designed and tested on the 4-generator 11-bus system and the IEEE 39-bus system, respectively. Through a comparison with the time domain transient simulation results, the efficiency of the algorithms is proved. Finally, the merits of this method as well as its possible applications in future are pointed out.