| 引用本文: | 郑伟业,吴文传,张伯明,等.基于内点法的交直流混联系统抗差状态估计[J].电力系统保护与控制,2014,42(21):1-8.[点击复制] |
| ZHENG Wei-ye,WU Wen-chuan,ZHANG Bo-ming,et al.Robust state estimator for AC/DC hybrid power system based on an interior point method[J].Power System Protection and Control,2014,42(21):1-8[点击复制] |
|
| 摘要: |
| 针对交直流混联系统的状态估计问题，分析了其数学模型，对其求解方法进行了研究，并开发了软件。介绍了交直流混联系统的抗差状态估计模型，根据该模型的特点进行变量等价转换，以降低其复杂度。在利用内点法进行求解时，通过对原问题的海森矩阵进行近似，确保其正定且提升了算法的效率。通过IEEE 9节点、14节点、30节点、118节点、145节点系统这5个算例，分析了算法效率以及收敛域。结果表明，与牛顿法相比，基于内点法的状态估计的收敛域更宽广，可以应对更恶劣的现场状况，具备现场应用潜力。 |
| 关键词: 电力系统 交直流混联系统 内点法 抗差状态估计 |
| DOI：10.7667/j.issn.1674-3415.2014.21.001 |
| 投稿时间：2014-02-19修订日期：2014-03-12 |
| 基金项目:国家重点基础研究发展计划(973计划)（2013CB228203） |
|
| Robust state estimator for AC/DC hybrid power system based on an interior point method |
| ZHENG Wei-ye,WU Wen-chuan,ZHANG Bo-ming,SUN Hong-bin |
| (State Key Lab of Power Systems, Dept of Electrical Engineering, Tsinghua University, Beijing 100084, China) |
| Abstract: |
| A robust SE model is introduced for AC/DC hybrid system. First, to simplify its formulation, the SE model is transformed into an equivalent form by introducing equality constraints and new variables. In this model, the hybrid system is formulated as a whole. Then, an interior point method is used to solve this problem. And an approximating technique is proposed to guarantee the Hessian matrix positive definite, which can significantly improve the efficiency of the solution. Five numerical tests with IEEE 9 node system, IEEE 14 node system, IEEE 30 node system, IEEE 118 node system, and IEEE 145 node system show that the proposed algorithm is efficient, robust and reliable. It has the potential to be applied in real application. |
| Key words: power system AC/DC hybrid system interior point method robust state estimation |
