全过程励磁控制对电力系统暂态稳定性的影响

摘要

为了充分挖掘励磁系统在提高电力系统暂态稳定性方面的潜力，文中研究和改进了暂态过程五阶段励磁控制策略，基于电力系统分析综合程序(PSASP)建立了全过程励磁控制模型，并将其应用到实际大规模电力系统中的多台发电机上。对四川电网及晋豫鄂特高压联络线近端不同故障情况下的仿真分析表明，全过程励磁控制能很好地降低故障后功角第1摆的摆幅，稳定电网电压水平，并由此对整个故障恢复过程起到积极作用，有效地提升电力系统的暂态稳定性。%In order to fully tap the potential of the excitation system in improving the power system transient stability,the transient process five-stage excitation control strategy is studied and improved.Based on the power system analysis software package (PSASP),a whole process excitation control model is built and applied to multiple generators in the actual large-scale power system.Simulation analysis under different fault conditions in Sichuan power grid and Shanxi-Henan-Hubei ultra-high voltage(UHV)link near-end shows that the whole process excitation control can effectively reduce the first swing amplitude of the power-angle,and stabilize the grid voltage level.The whole process excitation control plays a positive role in the recovery process and is able to enhance the power system transient stability.