【摘要】 提出一种用于电力系统动态安全分析的综合直接法，即 Ｐ Ｅ Ｂ Ｓ／ Ｂ Ｃ Ｕ 方法。该方法以故障点是否发生于机端为标记， 若是，则采用 Ｐ Ｅ Ｂ Ｓ方法确定临界能量；若否， 则采用 Ｂ Ｃ Ｕ 确定临界能量。利用这两种方法的改进方法及其优势互补性，可以显著提高直接法的可靠性和计算速度。当用于在线动态安全分析中作为分类器时，仅有极少数偶然事故需要用在线时域仿真分析，因而能够有效地应付计算速度的挑战更多还原

【Abstract】 The paper provides An integrated direct method for power system dynamic security analysis, i.e., the PEBS/BCU method, is put forward in this paper. If the fault takes place on the generator terminal, PEBS method is adopted to determine the critical energy, else BCU method is adopted to determine the critical energy. Making use of the improved techniques of these two methods and their complementary advantages, the reliability and the calculation speed of the direct method can be improved remarkably. When the method is used as a classifier in the on line dynamic security analysis, only a few cases are left for the on line time domain simulation analysis, so it can meet the challenge of the calculation speed. The calculation results of the method applied to the 16 generator 51 bus East China reduced system and the 6 generator 22 bus test system of EPRI of China are given .更多还原