电网技术2024，Vol.48Issue(5)：2199-2206,8.DOI:10.13335/j.1000-3673.pst.2023.0688
基于动作时限曲线拟合思想的含DG型配电网后备保护新方法
New Method for Backup Protection in Distribution Networks With DG Based on Idea of Action Time Limit Curve Fitting
摘要
Abstract
The integration of distributed generation(DG)may alter the short-circuit current characteristics of the power system,thereby affecting the selectivity and coordination of the inverse time overcurrent protection.Therefore,this article proposes a new method for backup protection in distribution networks with DG based on the idea of action time limit curve fitting.Starting from the action time difference between the main protection and the backup protection in the distribution network,a curve fitting model is established,and the gradient descent method is used to optimize the action time curve of the inverse time overcurrent protection.By considering the selectivity of the protection and the impact of DG connection in the optimization setting calculation,the optimization parameters are applied to every segment position in the distribution network.Then,by setting some two-phase and three-phase short-circuit faults in the distribution network,the parameters are adjusted based on the fault locations and types,and ultimately obtaining the global optimal solution of the parameters.Based on the PSCAD/EMTDC simulation software,simulation analysis is conducted to verify the effectiveness and practicality of the proposed method.关键词
反时限过流保护/分布式电源/梯度下降算法/曲线拟合/速动性/选择性Key words
inverse time overcurrent protection/distributed generation/gradient descent algorithm/curve fitting/rapidity/selectivity分类
信息技术与安全科学引用本文复制引用
黄景光,赵珩,李浙栋,张宇鹏,梅诺男,孙佳航,张员宁,翁汉琍..基于动作时限曲线拟合思想的含DG型配电网后备保护新方法[J].电网技术,2024,48(5):2199-2206,8.基金项目
国家自然科学基金项目(52107095).Project Supported by National Natural Science Foundation of China(NSFC)(52107095). （52107095）
