多机进相运行若干问题探讨

Discussion of several issues of leading phase operation of multi-generators

阐述多机进相(多台发电机同时进相)运行的必要性与重要性,重点探讨多机进相运行必须解决的若干关键问题和目前的研究现状。在单机进相运行理论分析和现场试验的基础上,对多机进相运行的稳定性、多机进相调压能力、多机协调进相以及深度优化等问题进行了系统分析,给出进一步开展多机进相运行的一些建议,指出相应的研究思路。结果表明:多机进相运行的调压效果比单机进相运行更显著,但是在一定程度上会降低整个系统的稳定裕度;在一定的无功调节范围内,为提高系统的暂态稳定性,应当安排多台发电机以适当的进相深度同时进相运行,尽量避免单台发电机深度进相运行。

The necessity and importance of leading phase operation of muhi-generators are described. The key issues and current status of research on leading phase operation of multi-generators are analyzed and discussed. Based on theoretical analysis and field tests of leading phase operation of a single generator, the power system stability, voltage regulation, coordinated leading phase, and depth optimization of leading phase operation of multi-generators are analyzed. Advice for carrying out leading phase operation of multi-generators is given. Important topics and future work related to the research are pointed out. The results show that the leading phase operation of multi-generators has a better voltage regulation effect compared with that of the single generator, but can reduce the stability margin of the whole power system to a certain degree. Within a certain reactive-power regulation range, to improve the transient stability of the whole power system, it is better to arrange multi-generators than to arrange a single generator for leading phase operation.