| 引用本文: | 易建波,王泽宇,胡维昊,等.新型同送同受路径的多回直流系统交互影响及协调恢复分析[J].电力系统保护与控制,2025,53(15):146-157.[点击复制] |
| YI Jianbo,WANG Zeyu,HU Weihao,et al.Analysis of the interaction impacts and coordinated recovery of new multi-UHVDC system with similar sending and receiving paths[J].Power System Protection and Control,2025,53(15):146-157[点击复制] |
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| 摘要: |
| 青豫与天中特高压直流已形成近似同送同受路径的多回直流输电系统，其送受端的网架结构和子系统间的交互特性更加复杂，因此故障交互影响和协调恢复问题是目前系统稳定研究的焦点。量化分析了多回直流各子系统电压交互特性，重新修订了适用于评价多回直流系统的交互因子和有效短路比，推导出实用的多回直流协调恢复因子实用计算方法。在此基础上，提出了由多回直流协调恢复因子指导恢复秩序、通过各子系统非线性低压限流环节控制配合的多回直流协调恢复策略。最后经过多回直流系统等值模型仿真测试，表明所提协调恢复策略控制效果最优，所推导的多回直流协调恢复因子工程实用性强。 |
| 关键词: 多回特高压直流输电系统 电压交互特性 协调恢复策略 低压限流环节 |
| DOI：10.19783/j.cnki.pspc.240908 |
| 投稿时间：2024-07-12修订日期：2024-11-27 |
| 基金项目:国家自然科学基金面上项目资助(52277083)；四川省科技厅重点研发计划项目资助(2021YFG0098) |
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| Analysis of the interaction impacts and coordinated recovery of new multi-UHVDC system with similar sending and receiving paths |
| YI Jianbo1,WANG Zeyu2,HU Weihao1,RAO Yufei3,LI Chenghao3 |
| (1. The Low Carbon Intelligent Power and Energy System Key Laboratory of Sichuan Province (University of Electronic
Science and Technology of China), Chengdu 611731, China; 2. Economic and Technical Research Institute,
State Grid Henan Electric Power Company, Zhengzhou 450052, China; 3. Electric Power Scientific
Research Institute, State Grid Henan Electric Power Company, Zhengzhou 450052, China) |
| Abstract: |
| Qingyu and Tianzhong UHVDC systems have formed a multi-UHVDC transmission system with similar sending and receiving paths. This results in more complex network topologies and stronger interdependencies between subsystems at both ends. Consequently, the issues of fault interaction and coordinated recovery have become key focal points in current system stabilization research. This paper quantitatively analyzes the voltage interaction characteristics among the subsystems of multi-UHVDC systems and revises the multi-UHVDC voltage interaction factor (MDC_VIF) and the multi-UHVDC effective short circuit ratio (MDC_ESCR) to better suit the evaluation of such systems. Subsequently, a practical calculation method of multi-UHVDC coordinated recovery factor (MDC_CRF) is derived. Then a multi-UHVDC coordinated recovery strategy is proposed with the recovery order guided by MDC_CRF and fitted by the control of the nonlinear voltage dependent current order limiter of each subsystem. Finally, simulation tests based on an equivalent model of a multi-UHVDC show that the proposed coordinated recovery strategy has optimal control effect, and the derived multi-UHVDC coordinated recovery factor is highly practical for engineering applications. |
| Key words: multi-UHVDC transmission systems voltage interaction characteristics coordinated recovery strategy voltage dependent current order limiter |
