PSS及最优励磁方式对电网稳定影响的分析

通过对黑龙江电网内大型火电机组采用不同励磁控制方式下的静态、暂态稳定水平研究，叙述了各区域电网内大型机组的实际情况，有针对性地进行最优励磁及优化运行参数、增加PSS控制形式的改造，从而大幅度提高东部电网外送暂态和动态稳定水平，并解决了部分电厂机组同时运行不能满出力等问题。

Effect of PSS and optimal way of excitation on stability of grid

The actual operation of large power generators in the regional grids are reviewed by studying the static and transient levels of stability achieved while different ways of excitation are employed for large thermal power generators in the Heilongjiang grid. By purposeful optimal excitation, optimization of operating parameters and addition of PSS control, the transient and dynamic stabilities of output from the eastern grid are greatly improved, and some power generators in that region are enabled to achieve their maximum outputs.