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中国电机工程学报 2009, 29(19) 20-26 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电力系统运行与规划 |
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使用等值导纳进行电力系统小世界特性识别 |
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徐林，王秀丽，王锡凡 |
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西安交通大学电气工程学院 |
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摘要：
提出基于等值导纳的电力系统小世界特性识别新指标。针对已有小世界模型大多基于最短路径假设，与电力系统实际不甚相符的问题，根据潮流“可分性”假设，采用戴维宁等值阻抗作为节点间距离的度量，将系统的全局和局部等效导纳作为识别小世界特性的新指标，并给出具体实现流程。与已有指标相比，该指标物理背景更符合电力系统实际，且实现算法具有多项式的时间复杂度，更适用于大规模系统分析。具体算例表明所提指标在电力系统小世界特性识别方面和已有模型同样有效，且可以解决某些已有模型不能正确解释的问题。对西北电网的分析表明了所提指标在实际应用中的有效性。 |
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关键词：
电力系统可靠性
小世界模型
戴维宁等值电路
等效导纳
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Small-world Feature Identification Based on Equivalent Admittance for Power System |
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XU Lin, WANG Xiu-li, WANG Xi-fan |
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School of Electrical Engineering, Xi’an Jiaotong University |
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Abstract:
New indices of small-world feature identification based on equivalent admittance for power system were presented with detailed implementation. Compared with the shortest path used in existed models, it is reasoned that the Thevenin’s equivalent impedance can be used as measurement of the distance between different buses according to partibility hypothesis of power flow. Global and local equivalent admittance were presented as indices to identify the small- world feature of power system with more comprehensible physical view and polynomial time complexity, which is simple to be implemented and more suitable for large-scale power system. Numeric examples show that the presented indices have the same effect as existed models while are more flexible for some situations in which the existed ones can not work properly. Analysis of Northwest China Power Grid shows that the presented indices are valid in practice. |
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Keywords:
power system reliability
small-world model
Thevenin’s equivalent circuit
equivalent admittance
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收稿日期 2008-05-19 修回日期 2008-09-25 网络版发布日期 2009-07-14 |
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DOI: |
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基金项目:
国家重点基础研究专项经费项目(2004CB217905). |
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通讯作者: 徐林 |
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作者简介: |
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| 本刊中的类似文章 |
| 1．徐林 王秀丽 王锡凡.基于电气介数的电网连锁故障传播机制与积极防御[J]. 中国电机工程学报, 2010,30(13): 61-68 |
| 2．徐林 王秀丽 王锡凡.电气介数及其在电力系统关键线路识别中的应用[J]. 中国电机工程学报, 2010,30(1): 33-39 |
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