智能分布式电网的改进矩阵故障定位算法  

Improved Matrix Fault Location Algorithm for Smart Distributed Grids

作　　者：郑兆晖 朱建良[1] ZHENG Zhao-hui;ZHU Jian-liang(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《淮阴工学院学报》2023年第1期39-45,共7页Journal of Huaiyin Institute of Technology

摘　　要：随着配电网智能化水平的提高和用户需求结构的优化升级,传统电网发电模式面临着火力资源日益匮乏、对环境造成严重污染及能源转化比低下等一系列问题。分布式电源凭借其环境友好、功率损耗低、安全性能高等特点,逐步接入到了配电网中。分布式电源的引入使得传统电网转变为以电为主体、多能互补的智能分布式电网。智能分布式电网提高了配电网接纳多元化负荷的承载力和灵活性,但其对电网结构形态的改变使得故障电流的电力方向发生变化,传统的故障定位技术已不能满足及时识别并处理线路故障的要求,因此需要改进相应的算法。以配电线路不同节点类型为基础,利用网络拓扑信息和线路故障信息构造出对应的矩阵,进行矩阵运算后依据判别原则判断故障所在区域,并利用电力仿真软件验证在不同故障情况下算法的适用性。最后,比较了改进后的矩阵定位算法与传统的矩阵定位算法,证明改进后的算法对于故障区域的判断相比传统矩阵算法更为准确。With the improvement of the intelligence level of the distribution network and the optimization and upgrading of the customer demand structure,the traditional power generation mode of the grid is facing a series of problems such as the increasing scarcity of thermal resources,serious pollution to the environment and low energy conversion ratio.Distributed power supplies are gradually being introduced into the distribution network due to their environmental friendliness,low power loss,high safety performance and other characteristics.The introduction of distributed power supplies has transformed the traditional power grid into an intelligent distributed grid with electricity as the mainstay,multi-energy complementarity and intelligence.The intelligent distributed grid has increased the carrying capacity and flexibility of the distribution grid to accept diversified loads,but its change to the structural form of the grid makes the power direction of the fault current change.The traditional fault location technology can no longer meet the requirements of timely identification and processing of line faults,so the corresponding algorithm needs to be improved to meet the needs of fault location.Based on the different node types of distribution lines,the corresponding matrix is constructed using network topology information and line fault information,the matrix operation is performed to determine the fault location area based on the discriminatory principle,and the applicability of the algorithm under different fault conditions is verified using power simulation software.Finally,the improved matrix location algorithm is compared with the traditional matrix location algorithm,which proves that the improved algorithm is more accurate in determining the fault area than the traditional matrix algorithm.

关 键 词：智能分布式电网 矩阵算法 故障定位算法 电力仿真 

分 类 号：V242.3[航空宇航科学与技术—飞行器设计]