基于曲面拟合方法的电力系统节点动态频率响应特性识别与预测研究

项目名称： 基于曲面拟合方法的电力系统节点动态频率响应特性识别与预测研究

项目编号： No.51207114

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电气科学与工程学科

项目作者： 吴军

作者单位： 武汉大学

项目金额： 24万元

中文摘要： 本课题在分析电力系统节点频率动态变化过程及其响应特性的影响因素基础上，提出节点动态频率响应的识别与预测方法，通过对电网仿真模型中对变动的运行方式及扰动状态下的节点动态频率变化及其频率响应特性进行采样，并采用曲面拟合方法将采样点拟合为状态空间曲面，同时采用系统实测参量对曲面进行插值和修正，得到连续曲面的解析表达式，并通过曲面反求方法预测和分析节点动态频率响应特性变化趋势。基于曲面拟合的节点频率动态响应特性特性识别和预测结果可以用于系统暂态频率稳定性分析及其他基于功率/频率响应特性的紧急控制措施当中。

中文关键词： 节点动态频率响应特性；曲面拟合；交换容量；核心骨干网架；差异化规划

英文摘要： Based on the analysis of dynamic change process influencing factors on power system nodal frequency and its response characteristics, it is mentioned that the identification and prediction method of nodal dynamic frequency response characteristic. The state space curved surface of dynamic frequency response characteristic is structured by the curved surface fitting method and data of dynamic frequency changes with power system operation mode and power disturb state, at the same time the curved surface could be interpolated and corrected with power system real measured parameters, then the analytic expression of continuous curved surface can be obtained and the changing trend of nodal dynamic frequency response characteristic can be predict by the reverse solving method. It could be used for the analysis of power system transient frequency stability and other emergency control method based on power-frequency response characteristics that the identification and prediction method with curved surface fitting of nodal dynamic frequency response characteristic.

英文关键词： nodal dynamic frequency response characteristic；curved surface fitting；exchange capacity；core backbone grid；differentiated planning