高压电器2025，Vol.61Issue(10)：227-236,10.DOI:10.13296/j.1001-1609.hva.2025.10.024
基于虚拟功率差异性的柔直电网故障保护方案
VSC DC Grid Fault Protection Scheme Based on Virtual Power Difference
李玉东 1刘天恩 1曾志辉 1韦延方 2杨湛晔3
作者信息
- 1. 河南理工大学电气工程与自动化学院,河南 焦作 454003
- 2. 河南理工大学电气工程与自动化学院,河南 焦作 454003||河南理工大学河南省煤矿装备智能检测与控制重点实验室,河南 焦作 454003
- 3. 海南绿色能源与环境工程技术研究院,海口 570125
- 折叠
摘要
Abstract
It is challenging to identify DC line faults quickly and reliably due to the complext fault characteristics of VSC DC power network.Therefore,in this paper a fault protection scheme for VSC DC power gri based on virtual pow-er is proposed.First,the variation of the virtual power of the upper limit current reactor of the DC line under different faults is analyzed;Then,in view of the differences in the virtual power of current-limiting reactors with different faults,faults inside and outside the zone are identified by calculating the variation rate of the virtual power of the cur-rent-limiting reactor,and the ratio of the power integrations of the positive and negative current-limiting reactors is calculated to determine the faulty pole.Finally,the experimental results show that the proposed protection scheme can accurately distinguish inside and outside as well as faulty poles,has low communication requirements and does not need complex data processing.It can work reliably under different working conditions and meet the protection re-quirements of the VSC DC grid.关键词
柔性直流电网/故障分析/限流电抗器/虚拟功率/单端量保护Key words
VSC DC grid/fault analysis/current limiting reactor/virtual power/single-ended quantity protection引用本文复制引用
李玉东,刘天恩,曾志辉,韦延方,杨湛晔..基于虚拟功率差异性的柔直电网故障保护方案[J].高压电器,2025,61(10):227-236,10.
