摘要
对于高渗透率分布式电源(DG)接入的配电网,提出了新型综合电流幅值比较的保护原理,通过线路两端分相全电流幅值以及正序故障电流幅值的比较进行故障定位,实现了低成本与高可靠性的兼容。并通过PSCAD搭建10 kV含分布式电源配电网模型,全面仿真了不同DG渗透率、故障位置、故障类型、过渡电阻、非同步数据等多种因素对保护原理的影响。经过理论分析和仿真,证明方案能够准确实现故障定位,利用的数据简单,耐过渡电阻能力优秀,保护配置要求低,抗同步误差强。
For distribution networks with high-permeability Distributed Generation (DG), this paper proposes a novel integrated current amplitude protection principle by comparing the two ends of the line full phase current amplitude and positive sequence fault current amplitude which achieves low-cost and high-reliability compatibility. The model of 10 kV active distribution network is built by PSCAD to comprehensively simulate the influence of different DG permeability, fault location, fault type, transition resistance, asynchronous data and other factors on the protection principle. After theoretical analysis and simulation, it is proved that the scheme can accurately solve the fault location problems, the data used is simple, the resistance to transition resistance is excellent, the protection configuration is low, and the ability of resisting synchronization error is strong.
作者
马帅
武志刚
高厚磊
徐彬
MA Shuai;WU Zhigang;GAO Houlei;XU Bin(Laiwu Power Supply Company, State Grid Shandong Electric Power Company, Laiwu 271100, China;School of Electrical Engineering, Shandong University, Jinan 250061, China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2019年第4期43-50,共8页
Power System Protection and Control
基金
国家自然科学基金项目资助(51377100)
国网山东电力公司科技项目资助(52061216000M)~~
关键词
有源配电网
电流幅值比较
正序故障分量
同步
保护
active distribution network
current amplitude comparison
positive sequence fault components
synchronize
protection
