基于WAMS的电力系统受扰轨迹预测  

Perturbed Trajectory Prediction Method Based on Wide Area Measurement Systems

作　　者：宋方方[1] 毕天姝[1] 杨奇逊[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室

出　　处：《电力系统自动化》2006年第23期27-32,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50607005);教育部科学技术研究重点项目(106052);新世纪优秀人才支持计划(NCET-05-0216);长江学者和创新团队发展计划(IRT0515)~~

摘　　要：基于相量测量单元(PMU)上传的实时功角数据,应用曲线拟合理论,提出了一种电力系统事故后功角轨迹快速预测的新方法。该方法从一个简单电力系统调速控制模型出发,推导出了功角与时间关系的数学模型,即功角随时间呈正弦衰减变化。由此提出了利用三角函数曲线拟合技术,对功角受扰轨迹进行预测。对IEEE 9节点系统与华北电网进行了仿真计算,结果验证了该方法的有效性。此外,与多项式曲线拟合法的对比分析表明,该方法优于传统的多项式曲线拟合法,具有更好的预测效果。A novel method for perturbed trajectory prediction of post-fault rotor angle is presented in this paper, which is based on phasor measurement unit （PMU）measurements and trigonometric function curve fitting technique. A mathematical relationship of post-fault rotor angle and time is derived from a speed governing system, which reveals that the perturbed trajectorv of the post-fault rotor angle can be expressed by attenuation trigonometric functions. Using curve fitting technique and trigonometric function, a least square method to predict the perturbed trajectory is proposed. Numerical simulations are conducted in IEEE 9-bus system and the simplified north China grid to test the effectiveness of the proposed method. The proposed method can give more reasonable and more promising prediction results as compared with polynomial curve fitting technique.

关 键 词：广域测量系统(WAMS) 轨迹预测 功角 曲线拟合 电力系统 

分 类 号：TM711[电气工程—电力系统及自动化] TM712