中文摘要：

在某地区电网现有网架基础上分别就考虑和不考虑水电机组调速特性两种工况进行了仿真分析，得出了两种工况下的联络线极限传输功率。考虑水电机组调速特性时联络线的极限传输功率有一定程度的提高；但对于纯水电机组构成的电网，水电机组在故障情况下的动态反调特性对联络线的极限传输功率也有一定的制约作用。

英文摘要：

The simulation and analysis of two operating conditions are carried out with and without the speed - regulating characteristics of hydroelectric generating set in the current power grid, and the tie - line transmission power limits under both con- ditions are obtained. According to the results, the tie - line transmission power limit with speed - regulating characteristics of hydroelectric generating set is higher than the tie - line transmission power limit without speed - regulating characteristics of hydroelectric generating set. But as the current power grid is consisted merely of hydroelectric generating set, the tie - line transmission power limit will also be restricted by the anti - regulation characteristics of hydroelectric generating set under faulted condition.