发电机励磁系统调节参数对电力系统动态电压稳定的影响

Study of generator excitation system regulator parameters affecting power system dynamic voltage stability

电力系统电压稳定问题的本质是动态稳定问题,感应电动机、热载负荷等负荷特性对电压稳定有重要影响。发电机是电力系统最重要的动态无功源,发电机励磁系统的快速励磁能力是预防系统电压失稳的重要保障。为从电源侧出发研究发电机励磁系统调节参数对系统动态电压稳定的作用,详细分析了发电机励磁系统调节参数对发电机的快速励磁能力和动态电压支撑能力的影响。最后,应用PSAT仿真软件对IEEE14节点系统进行了仿真计算。研究结果表明,发电机励磁系统调节参数对保持电力系统动态电压稳定的具有重要作用。

Power system voltage stability is a dynamic stability problem, induction motors and thermal control loads etc. , these dynamic loads have great impacts on the voltage stability. Generators are the most important dynamic reactive sources of the power system, and their quick exciting ability of their excitation system can effectively prevent the voltage instability. In order to study the dynamic voltage stability problem from the generator side, the regulator parameters affecting the quick exciting ability of excitation system and the dynamic voltage support ability of generator were exactly analyzed. At last, the simulation of IEEE14 node system was done, using the PSAT analysis tool. The results verily that the regulator parameters of the generator excitation system have important effects on keeping the power system dynamic voltage stability.