基于Matlab的输电线路纵联差动保护实验仿真平台
发布时间:2019-07-28 14:39
【摘要】:介绍了一种利用Matlab搭建输电线路纵差保护实验仿真平台的方法。利用实验仿真平台对输电线路常用到的全电流差动保护、基于工频变化量差动保护和零序差动保护3种判据,以及不平衡电流进行了仿真。以图文并茂的形式分析了3种保护判据的动作行为以及不平衡电流对其的影响。通过设置不同的过渡电阻对3种判据的灵敏度分别进行了具体分析。最后通过与实际线路保护装置的动作特性曲线比较,验证了所搭建的保护模型的正确性。该平台可使学生既形象又深刻地理解线路纵差保护的原理,经在课堂教学中应用,收到了良好的效果。
[Abstract]:This paper introduces a method of using Matlab to build an experimental simulation platform for transmission line longitudinal differential protection. The experimental simulation platform is used to simulate the full current differential protection commonly used in transmission lines, based on three criteria of power frequency variation differential protection and zero sequence differential protection, as well as unbalanced current. The action behavior of three protection criteria and the influence of unbalanced current on them are analyzed in the form of graphics and texts. The sensitivity of the three criteria is analyzed by setting different transition resistance. Finally, the correctness of the protection model is verified by comparing with the action characteristic curve of the actual line protection device. The platform enables students to understand the principle of line longitudinal differential protection vividly and deeply, and has achieved good results through its application in classroom teaching.
【作者单位】: 山东科技大学电气与自动化工程学院;
【基金】:山东省应用基础型特色名校工程
【分类号】:TM773
[Abstract]:This paper introduces a method of using Matlab to build an experimental simulation platform for transmission line longitudinal differential protection. The experimental simulation platform is used to simulate the full current differential protection commonly used in transmission lines, based on three criteria of power frequency variation differential protection and zero sequence differential protection, as well as unbalanced current. The action behavior of three protection criteria and the influence of unbalanced current on them are analyzed in the form of graphics and texts. The sensitivity of the three criteria is analyzed by setting different transition resistance. Finally, the correctness of the protection model is verified by comparing with the action characteristic curve of the actual line protection device. The platform enables students to understand the principle of line longitudinal differential protection vividly and deeply, and has achieved good results through its application in classroom teaching.
【作者单位】: 山东科技大学电气与自动化工程学院;
【基金】:山东省应用基础型特色名校工程
【分类号】:TM773
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