摘要
自并励静止励磁系统是国内大型汽轮机组常采用的励磁系统之一,其励磁电源取自机端电压。然而国内外电力系统稳定研究采用的励磁标准模型中忽略了机端电压对励磁电源的影响,在机端电压发生大幅跌落时,采用励磁系统标准模型可能无法准确反映励磁电压以及机端电压的动态特性。本文对自并励静止励磁系统标准模型迚行修正,考虑励磁功率单元和灭磁系统的动态特性,建立更为完善的电磁暂态模型,即自并励静止励磁系统精细模型,并通过算例对其迚行功能性仿真,验证了精细模型的正确性。
Potential source static excitation system is one of the most commonly used excitation systems in large turbine-generators in China. In this kind of excitation system, the excitation source comes from the generator terminal. However, all the standard models for power system stability studies of this kind of excitation system ignore the influence of the generator terminal voltage on the excitation source. While there is large drop of the voltage occurring at the generator terminal, it is hard to get the accurate dynamic characteristics of both the voltages at the excitation system and generator terminal by using the standard models. In this paper, the excitation source of the standard model has been revised by considering the dynamic characteristics of excitation power unit and de-excitation system, and a more accurate electromagnetic transient model has been founded, which is the Exact model of potential source static excitation system. The accuracy of the revised model has been validated through a comprehensive set of simulation studies.
出处
《大电机技术》
2016年第4期55-60,共6页
Large Electric Machine and Hydraulic Turbine
关键词
自并励静止励磁
精细模型
电磁暂态仿真
励磁功率单元
灭磁系统
potential source static excitation system
exact model
electromagnetic transientsimulation
excitation power unit
de-excitation system
