华东电力系统低谷负荷时的暂态稳定研究

对华东电力系统若干种典型的进相运行方式的暂态稳定计算结果表明，发电机进相运行使系统暂态稳定裕度降低，但是，在系统内选择地位适当的大型发电机在一定的范围内作进相运行，仍是缓和系统低谷负荷时电压偏高的一种可行而有效的手段。

TRANSIENT STABILITY STUDY OF EAST CHINA POWER SYSTEM DURING LIGHT LOAD

The result of calculation of transient stability for East China power system under some typical underexcited operating condition reveals that underexcited operation reduces the margin of transient stability of the system.However, it still can be concluded from this paper that to select some proper large capacity generators operating under the underexcited condition is an effective and available method to lower the abnormal higher voltage during light system load.In this paper, comparison between the synchronous machine model described by Park's equations considering A. V. R. and turbine governor and the synchronous machine model assuming Eq' remained constant has been made in the study of the transient behaviour of a large power system. The conclusion is that the result calculated with the former model is more conservative than the result calculated with the latter model during the first swing. On the contrary, the result calculated with the former model is more optimistic than with the latter model after the first swing.