配电网的安全距离:定义与方法

发布时间：2018-04-18 03:17

  本文选题：配电网 + 安全距离　； 参考：《中国电机工程学报》2017年10期

【摘要】：提出配电网安全距离的严格定义,并基于安全距离发展出新的安全评价方法。安全距离是当前状态(工作点)到安全边界的距离,是安全评价的关键数据。首先,该文规范了配电网安全距离的定义,将其分为几何安全距离(geometric security distance,GSD)和馈线安全距离(feeder security distance,FSD),并给出两者的计算公式。其次,分析了两种安全距离的物理意义:GSD能得到多个馈线负荷同时变化时的保守负荷裕度;FSD能够得到单个馈线负荷变化的精确负荷裕度。再次,该文全面分析了安全距离在安全评价中的用途,并提出了基于工作点位移的安全评价新方法。该方法利用新工作点的位移信息和原工作点的安全距离,能更方便快捷地得到新工作点的安全评价结果,适合实际运行中实时跟踪评价工作点的变化。最后,通过算例比较了GSD和FSD的计算结果以及两者在安全评价上的精度和速度。该文研究有助于对配电网安全距离的规范与深入认识,所发展的新方法使得安全距离可以更有效地用于在线安全评价。
[Abstract]:The strict definition of safety distance of distribution network, and develop a safe distance safety evaluation based on the new method. The safe distance is the current state (point) to the boundary distance, is the key to data security evaluation. Firstly, this paper defines the standard distribution network security distance, which can be divided into geometric distance (safety geometric security distance, GSD) and security (feeder security distance, FSD distance), and gives a calculation formula of the two. Secondly, analyzed two kinds of safety distance of the physical meaning of GSD can get a plurality of feeder load change at the same time when the conservative load margin; FSD can get a single feeder load change accurate load margin. Again, this paper comprehensively analyzes the use of safety distance in safety evaluation, and put forward a new method of safety evaluation based on point displacement. The method using the new operating point displacement information and the original work The distance from the point of safety, safety evaluation results can get the new operating point is more convenient, suitable for real-time tracking and evaluation in actual operation point. Finally, the calculation results of GSD and FSD and their accuracy and speed in safety evaluation were compared through examples. The research helps to distance distribution network security specification and in-depth understanding, the new method makes the development of safe distance can be more effectively used for online safety evaluation.

【作者单位】： 智能电网教育部重点实验室(天津大学);
【基金】：国家重点研发计划项目课题(2016YFB0900103) 国家自然科学基金项目(51477112) 国家电网公司科技项目(DZ71-16-039)~~
【分类号】：TM72
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本文编号：1766555