浙江电力2025，Vol.44Issue(4)：19-27,9.DOI:10.19585/j.zjdl.202504003
基于边界暂态功率方向的混合级联直流系统线路保护方案
A line protection scheme for hybrid cascaded DC transmission systems based on boundary transient power direction
摘要
Abstract
Due to the complex structure of hybrid cascaded DC transmission systems,a DC line protection scheme based on boundary transient power direction is proposed to enhance protection adaptability.First,the smoothing re-actor serves as the boundary,enabling the derivation of transient power direction from voltages and currents on both sides of the reactor during line faults.Then,internal and external faults are identified by analyzing the characteris-tics of the boundary transient power direction,and the faulted pole is determined by comparing the summation of positive and negative boundary transient power values.Finally,the Baihetan-Jiangsu UHV hybrid cascaded DC transmission system is modeled using simulation software to verify the protection scheme.Results show that the pro-posed protection scheme can accurately identify internal and external faults within 6 ms and withstand transition re-sistances up to 600 Ω.关键词
混合级联直流输电系统/线路保护/暂态功率方向/平波电抗器/故障识别/选极判据Key words
hybrid cascaded HVDC transmission system/line protection/transient power direction/smoothing re-actor/fault identification/pole selection criterion引用本文复制引用
王书征,杨军炜,王晓琪,韩彬彬,张金华..基于边界暂态功率方向的混合级联直流系统线路保护方案[J].浙江电力,2025,44(4):19-27,9.基金项目
国家自然科学基金(52107098) （52107098）
