引用本文: | 钟浩,舒文倩,唐民富.基于局部曲线拟合的电压失稳预防控制算法[J].电力系统保护与控制,2013,41(12):36-40.[点击复制] |
ZHONG Hao,SHU Wen-qian,TANG Min-fu.Preventive control method to avoid voltage instability based on local curve fitting[J].Power System Protection and Control,2013,41(12):36-40[点击复制] |
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摘要: |
为了快速获得预想失稳故障下的电压稳定预防控制方案,提出了一种基于局部曲线拟合的电压失稳预防控制算法。在深入研究电压稳定鞍结分岔点特性的基础上,利用局部曲线拟合方程式推导了一种无需分岔点处雅可比矩阵零特征值所对应左特征向量即可快速计算负荷裕度灵敏度的方法。根据所求得的灵敏度建立失稳故障的预防控制模型,给出了预防电压失稳的控制方案。对IEEE-57节点系统的仿真结果表明,所提方法能够快速、准确地计算系统负荷裕度灵敏度,并且能够有效地将系统运行点拉回电压稳定安全域。 |
关键词: 失稳故障 鞍结分岔 局部曲线拟合 灵敏度 预防控制 |
DOI:10.7667/j.issn.1674-3415.2013.12.006 |
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基金项目:湖北省科技厅项目(B2013168);三峡大学启动基金(KJ2011B037) |
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Preventive control method to avoid voltage instability based on local curve fitting |
ZHONG Hao1,SHU Wen-qian1,TANG Min-fu2 |
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Abstract: |
In order to obtain the preventive control scheme of voltage stability under unstable contingency, a preventive control method to avoid voltage instability based on local curve fitting is presented. Based on the study of characteristics of voltage stability saddle node bifurcation point, a method to calculate the load margin sensitivity without the left vector is proposed based on local curve fitting equation. These sensitivity information of loading margin with respect to control parameters are used to establish a linear programming model for preventive control, and then the control scheme to avoid voltage instability is given. Tests with IEEE-57 bus system indicate that the sensitivity is calculated accurately and the operating point is pulled back to voltage stability security region effectively. |
Key words: unstable contingency saddle node bifurcation local curve fitting sensitivity preventive control |