| 基于动态安全域与埃奇沃斯级数的电力系统暂态稳定概率评估 |
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| 引用本文： | 汪隆君,王钢. 基于动态安全域与埃奇沃斯级数的电力系统暂态稳定概率评估[J]. 中国电机工程学报, 2011, 0(1) |
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| 作者姓名： | 汪隆君 王钢 |
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| 作者单位： | 华南理工大学电力学院; |
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| 基金项目： | 国家自然科学基金项目(50977032,50337010)~~ |
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| 摘 要： | 电力系统暂态稳定概率评估是确定性评估的有益补充。以安全域概率稳定模型为基础,基于动力系统理论确定电力系统暂态稳定主导不稳定平衡点附近的动态安全域线性边界,并采用以半不变量为基础的埃奇沃斯(Edgeworth)级数展开获得随机变量加权的联合概率分布,从而构建电力系统暂态稳定概率模型。该模型能有效计及发电机的出力和内电势、负荷的有功和无功功率、故障类型、故障位置和故障切除时间等多个不确定性因素,不需要繁琐的公式推导,物理意义清晰,实现简单,计算效率高。经IEEE 10机39节点系统测试和蒙特卡罗(Monte-Carlo)模拟法的验证,表明所提模型和方法是有效可行的,具有广阔的工程应用前景。
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| 关 键 词： | 暂态稳定 动态安全域 埃奇沃斯级数 概率评估 |
Probabilistic Assessment of Transient Stability Based on Dynamic Security Region and Edgeworth Series |
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| WANG Longjun,WANG Gang. Probabilistic Assessment of Transient Stability Based on Dynamic Security Region and Edgeworth Series[J]. Proceedings of the CSEE, 2011, 0(1) |
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| Authors: | WANG Longjun WANG Gang |
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| Affiliation: | WANG Longjun,WANG Gang(College of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong Province,China) |
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| Abstract: | Probabilistic assessment of power system transient stability is a useful complement to determinate evaluation.The linear boundary of dynamic security region of the controlling unstable equilibrium point was determined on the basis of dynamical system theory.Then,Edgeworth series expansion based on semi-invariant was employed to calculate the weighted joint probability distribution.Consequently,power system transient stability probabilistic model was established.The model can effectively consider many uncert... |
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| Keywords: | transient stability dynamic security region Edgeworth series probabilistic assessment |
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