基于改进连续潮流法的静态电压稳定分析  

Static Voltage Stability Analysis Based on Improved Continuation Power Flow

作　　者：伍利[1] 古婷婷[1] 姚李孝[1] 

机构地区：[1]西安理工大学水利水电学院,陕西省西安市710048

出　　处：《电网技术》2011年第10期99-103,共5页Power System Technology

摘　　要：在传统连续潮流法的基础上提出一种更快更准确的静态电压稳定分析法——改进连续潮流法。此方法采用牛顿插值法进行预测,用改进牛顿–拉夫逊法对预测结果进行修正;考虑发电机无功出力极限,对发电机节点进行PQ节点转换。此方法灵活准确,修正量少,与以前所提出的连续潮流法相比更能准确反映发电机的实际运行状况,具有计算准确、迭代次数少、易于理解等优点。在IEEE 9节点系统上,分别在不计无功极限和计及无功极限的情况下与传统算法进行比较,迭代次数和迭代时间均有改进。Based on traditional continuation power flow a faster and more accurate static voltage stability analysis method, called improved continuation power flow method, is proposed. In the proposed algorithm, the Newton quadric interpolation method is used for the prediction; the improved Newton-Raphson method is used to modify the prediction results; considering the limit of reactive power output of generator, the PQ node conversion is applied to generator nodes. The proposed method is flexible, accurate, easy to understand and can reflect actual operation condition of generator more accurately than previous continuation power flow method. In the proposed method there are lesser corrections to be modified and lesser iterations. Taking IEEE 9-bus system as the background, the proposed method is compared with traditional algorithm under the conditions of considering and not considering reactive power limit respectively, and comparison result shows that the proposed method is better than traditional method in both iterations and iteration time.

关 键 词：静态电压稳定:连续潮流 局部参数化 牛顿插值 无功极限 

分 类 号：TM71[电气工程—电力系统及自动化]