作　　者： (梁辰）; (刘道伟）; (焦彦军）; (马世英）; (章锐）;

机构地区： 华北电力大学电气与电子工程学院,河北省保定市071003

出　　处： 《电网技术》 2017年第9期2972-2978,共7页

摘　　要： 准确、快速计算戴维南等值参数是实现电网稳定态势在线评估的关键。针对系统运行过程中等值参数不断变化的实际情况,在戴维南等值参数解析的基础上,提出了一种戴维南等值参数计算的新方法。首先,将电力系统各元件等值为阻抗支路;然后,将等值阻抗作为链支对节点阻抗矩阵进行支路追加形成系统阻抗矩阵,并利用GPU并行加速计算;最后,从系统阻抗矩阵解析得出戴维南等值参数。通过仿真和真实算例分别验证了所提方法的准确性和快速性。 Accurate and fast calculation of Thevenin equivalent parameters is the key to online assessment of power grid stability. A new method for calculating equivalent Thevenin parameters is proposed based on analytical expression, considering actual situation of equivalent parameter variation during system operation process. Firstly, components of the power system are equivalent to an impedance branch. Then, the equivalent impedance is used as chain impedance added to node impedance matrix, forming a system impedance matrix, and GPU is used to accelerate parallel calculation. Finally, equivalent Thevenin parameters are obtained from system impedance matrix analysis. Accuracy and speed of the proposed method are verified with simulation and real case study respectively.

关 键 词： 戴维南等值 节点阻抗矩阵 支路追加 并行计算