电网技术Issue(9)：2532-2537,6.DOI:10.13335/j.1000-3673.pst.2014.09.034
分布式发电配电网新型充分式保护原理及方案
Principle and Implementation of A Novel Sufficient Criterion Protection for Distribution Network With Distributed Generation
摘要
Abstract
A novel protection and judgment strategy for distribution network with distributed generation (DG), which is known as the sufficient criterion protection, is proposed. Different from traditional protection idea that demands the protection scheme to hold absolute selectivity for any type of fault that may occur theoretically, the idea of the proposed sufficient criterion protection only focuses on the fault that is more likely to happen under vast majority of cases and extracts the representative fault feature. It is hard for traditional protection methods to solve the problem of protecting the distribution network with grid-connected DG, so they have to be forced to decrease the efficiency of DG or increase the protection cost obviously, however the proposed sufficient criterion protection aims at the extracted general fault feature and adopts simple and effective means to solve the problem. Because the proposed sufficient criterion protection is based on the fault feature, the judgment of the proposed protection is sufficient and reliable. For distribution network with gird-connected DG, the feature of the amplitude of the fault current is analyzed, and on this basis a current amplitude based sufficient criterion protection scheme is put forward and the detailed judgment method for the protection and its logical block diagram are given. The practicability of the sufficient criterion protection idea and the correctness of the proposed method are validated by simulation results of distribution network with grid-connected DG.关键词
充分式保护/分布式发电配电网/故障特征/故障电流幅值/继电保护Key words
sufficient criterion protection/distribution network with distributed generation/fault feature/fault current amplitude/protective relaying分类
信息技术与安全科学引用本文复制引用
许偲轩,陆于平,章桢,陈玉伟..分布式发电配电网新型充分式保护原理及方案[J].电网技术,2014,(9):2532-2537,6.基金项目
国家自然科学基金资助项目(51377022，50977012)。Project Supported by National Natural Science Foundation of China(51377022,50977012) （51377022，50977012）
