| 引用本文: | 云雷,刘涤尘,张琳,周宏,黄涌,蔡夏.负荷特性对跨区大电网低频振荡的影响研究[J].电力自动化设备,2009,(8): |
| .Influence of load characteristics on low frequency oscillation in cross-regional power grid[J].Electric Power Automation Equipment,2009,(8): |
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| 摘要: |
| 研究了动静态负荷特性对跨区域互联电网低频振荡阻尼特性的影响.介绍了电力系统研究中常用到的静态和动态负荷模型,其中动态负荷模型为考虑感应电动机机械暂态过程的电动机和恒定阻抗的组合.以研究电力系统低频振荡常用的单机无穷大系统(Phillips-Heffron模型)为例,运用阻尼转矩分析法.对模型中分别采用动静态负荷模型时,系统振荡模式的阻尼转矩系数进行了分析计算.并列写出其详细表达式.在4机2区域系统中对采用不同负荷模型及其相关参数发生变化时区域振荡模式的阻尼和频率特性进行了计算仿真,得到了系统阻尼比随负荷特性增大或减少的变化趋势.并且在跨区域大电网及华中电网2008年枯小运行方式下对相关结论进行了验证.计算结果与理论分析和仿真结果一致. |
| 关键词: 跨区电网 阻尼转矩 动态负荷 静态负荷 低频振荡 |
| DOI： |
| 分类号:TM712 |
| 基金项目: |
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| Influence of load characteristics on low frequency oscillation in cross-regional power grid |
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YUN Lei1 LIU Dichen1 ZHANG Lin1 ZHOU Hong2 HUANG Yong2 CAI Xia3
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| Abstract: |
| The effect of the dynamic and static load characteristics on the damping torque of low frequency oscillation in cross-regional power grid is analyzed.The dynamic and static load models are proposed.The dynamic load model is composed of the constant impedance and the induction motor considering the mechanical transient process.With the single-machine infinite-bus system(Phillips-Heffron Model) as an example,commonly used in the study of power system low-frequency oscillation,the damping torque analysis metho... |
| Key words: cross-regional power grid damping torque dynamic load static load low-frequency oscillation |
