南方电网技术2023，Vol.17Issue(12)：1-9,9.DOI:10.13648/j.cnki.issn1674-0629.2023.12.001
多直流馈入输电系统中高压柔性直流高频风险评估计算方法
Calculation Method for High Frequency Risk Assessment of VSC-HVDC in Multi-Infeed DC Transmission System
摘要
Abstract
For multi-infeed HVDC system,when analyzing the high-frequency resonance risk of voltage source converter-high volt-age direct current(VSC-HVDC)and AC external systems,the influence of other DC in the near region on the AC external impedance characteristics is less considered.Aiming at the risk assessment of high frequency resonance between a single VSC-HVDC and external system,this paper first introduces the calculation method of harmonic impedance of AC external system including multi-infeed DC and other power electronic equipment.Considering the problems of multiple DC operation modes,multiple parameters,complex acquisition of harmonic impedance characteristics,low efficiency and doubtful necessity of detailed calculation in the system,the multi-infeed interaction factor(MIIF)index is introduced to measure the strength of interaction between various converter stations in the multi-infeed HVDC system to evaluate the DC that needs to be considered in detail when calculating the harmonic impedance of VSC-HVDC external systems,so as to calculate the harmonic impedance of VSC-HVDC external systems quickly and accurately.Finally,based on the actual data of a multi-infeed HVDC provincial power grid,the accuracy of the proposed method is verified.The proposed method can provide a more accurate,fast and effective method for high-frequency risk analysis and avoidance of VSC-HVDC planning operation in multi-infeed HVDC system.关键词
高压柔性直流/高频谐振/谐波阻抗/多直流馈入Key words
VSC-HVDC/high frequency resonance/harmonic impedance/multi-infeed DC分类
信息技术与安全科学引用本文复制引用
李清,张东辉,陈名,周强,徐智华..多直流馈入输电系统中高压柔性直流高频风险评估计算方法[J].南方电网技术,2023,17(12):1-9,9.基金项目
国家自然科学基金资助项目(U22B6008) （U22B6008）
中国南方电网有限责任公司科技项目(CGYKJXM20210122). Supported by the National Natural Science Foundation of China(U22B6008) （CGYKJXM20210122）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(CGYKJXM20210122). （CGYKJXM20210122）
