| 引用本文: | 马 静,彭明法,王 彤,杨奇逊.基于二阶摄动理论的不确定系统小干扰稳定分析方法[J].电力自动化设备,2013,33(7): |
| MA Jing,PENG Mingfa,WANG Tong,YANG Qixun.Small signal stability analysis based on second order perturbation theory for uncertain power system[J].Electric Power Automation Equipment,2013,33(7): |
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| 摘要: |
| 针对电力系统多运行参数波动较大的情况下，振荡模式的阻尼比以及系统的运行状态难以在区间模型下连续描述的问题，提出一种基于二阶摄动理论的小干扰稳定分析方法。建立不确定信息下获取系统振荡模式分布情况的复模态二阶摄动模型，在此基础上，连续描述运行状态在不确定变化区间内振荡模式阻尼比的变化轨迹。IEEE 16机68节点系统仿真结果表明：不同运行参数在区间范围内变化时，对同一振荡模式的阻尼比影响程度不同；同一运行参数在区间范围内变化时，对不同振荡模式的阻尼比影响不同。在多运行参数波动较大的情况下，该方法也能较准确地评估系统的小干扰稳定情况。 |
| 关键词: 低频振荡 二阶摄动理论 区间分布 阻尼比 电力系统 稳定性 |
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| 基金项目:国家重点基础研究发展计划（973计划）项目（2012-CB215200）；国家自然科学基金资助项目（51277193，50907021，50837002）；中央高校基本科研业务费专项资金资助项目（11MG01）；教育部留学回国人员科研启动基金资助项目（［2011］1139）；河北自然科学基金资助项目（E2012502034）；中国电机工程学会电力青年科技创新项目（［2012］46）；河北省电力公司科技项目（KJ［2012］278-280） |
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| Small signal stability analysis based on second order perturbation theory for uncertain power system |
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MA Jing, PENG Mingfa, WANG Tong, YANG Qixun
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State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources，
North China Electric Power University，Beijing 102206，China
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| Abstract: |
| When multiple operating parameters of power system vary severely，it is difficult to continuously describe the damping ratio of oscillation mode and system operational states by interval model，for which，a method of small signal stability analysis based on second order perturbation theory is proposed. The complex second order perturbation model of oscillation modes under uncertainties is built，based on which，the variation trajectory of damping ratio is continuously described when the operational state locates in the uncertainty interval. Simulative results for IEEE 16-generator 68-bus system show that，different operating parameters have different impacts on the damping ratio of a particular oscillation mode when they vary in the interval，while a particular operating parameter has different impacts on the damping ratio of different oscillation modes when it varies in the interval. The proposed method can accurately evaluate the small signal stability when multiple operating parameters fluctuate greatly. |
| Key words: low-frequency oscillation second order perturbation interval distribution damping ratio electric power systems stability |
