| 引用本文: | 周子涵,熊小玲,李浩,丁子迅,王胜威,赵成勇.基于CSC的柔性低频输电系统直流串联耗能装置设计及投切策略[J].电力自动化设备,2026,46(2):102-109. |
| ZHOU Zihan,XIONG Xiaoling,LI Hao,DING Zixun,WANG Shengwei,ZHAO Chengyong.Design and switching strategy of DC series energy dissipation device of flexible low-frequency transmission system based on CSC[J].Electric Power Automation Equipment,2026,46(2):102-109. |
|
| 摘要: |
| 基于电流源换流器(CSC)的柔性低频输电系统相较于传统方案具有无需建设海上平台、无换相失败风险和故障穿越能力强等优势。由于CSC陆上交流故障的过电流特性，当前柔性直流输电系统故障穿越主要采用的直流并联耗能装置在应用时无法有效地消耗盈余功率。为此，分析了基于CSC的柔性低频输电系统陆上交流故障的过电流特性，提出了一种直流串联耗能装置参数设计方案，并在计算系统的盈余功率后分组投切耗能子模块以抑制直流电压纹波。仿真结果表明，所提直流串联耗能装置可以将直流电压纹波限制在5%以内，实现了系统的交流故障穿越。 |
| 关键词: 柔性低频输电系统 电流源换流器 交流故障穿越 直流串联耗能装置 低纹波控制 |
| DOI：10.16081/j.epae.202510011 |
| 分类号: |
| 基金项目:国家自然科学基金联合基金资助项目(U23B20119) |
|
| Design and switching strategy of DC series energy dissipation device of flexible low-frequency transmission system based on CSC |
|
ZHOU Zihan, XIONG Xiaoling, LI Hao, DING Zixun, WANG Shengwei, ZHAO Chengyong
|
|
State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206
|
| Abstract: |
| Compared with the conventional scheme, the flexible low-frequency transmission system based on current source converter(CSC) has the advantages of no need to construct the offshore platform, no risk of commutation failure, and the strong ability of fault ride-through. Due to the over-current characteristics of CSC onshore AC faults, there are great limitations of effectively consuming the surplus power in the application of DC parallel energy dissipation devices mainly used in the current flexible DC transmission system fault ride-through. Therefore, the over-current characteristics of the flexible low-frequency transmission system based on CSC are analyzed under the onshore AC fault, and a parameter design scheme of DC series energy dissipation device is proposed, the energy-dissipating sub-modules are switched in groups to limit the ripple of DC voltage after calculating the surplus power of the system. The simulative results show that the proposed DC series energy dissipation device can limit the DC voltage ripple to 5 %,and realize the AC fault ride-through of the system. |
| Key words: flexible low-frequency transmission system current source converters AC fault ride-through DC series energy dissipation device low-ripple control |
