| 引用本文: | 陈启超,李晖,吴文传,刘杰,张怡,王菲,索之闻,蒋维勇.基于VSC-HVDC异步互联系统联网转孤岛运行稳定控制策略[J].电力自动化设备,2020,40(4): |
| CHEN Qichao,LI Hui,WU Wenchuan,LIU Jie,ZHANG Yi,WANG Fei,SUO Zhiwen,JIANG Weiyong.Stability control strategy for conversion from grid-tied to island operation of asynchronous interconnected power grids based on VSC-HVDC[J].Electric Power Automation Equipment,2020,40(4): |
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| 摘要: |
| 以渝鄂背靠背柔性直流工程为案例，对交流联络线N-2故障跳开形成柔直+交流近区局域电网孤岛运行方式下系统存在的主要稳定问题及其特征进行分析。建立了能够准确反映渝鄂柔性直流系统、九盘地区电网实际特性的电磁暂态仿真模型，重点围绕联网转孤岛的暂态特性展开了研究，对开机、负荷以及机组旋备关键影响因素进行了敏感性分析。通过时域仿真分析法给出了不同运行方式下、不同应对措施下，保障联网转孤岛系统稳定运行的交流联络线潮流预控范围，并据此提出了九盘地区联网转孤岛运行的稳控策略，为渝鄂柔性直流系统的安全稳定运行提供了技术支撑。 |
| 关键词: 异步联网 柔性直流输电 孤岛 附加频率控制 功率紧急控制 稳定控制策略 |
| DOI：10.16081/j.epae.202003026 |
| 分类号:TM721.1 |
| 基金项目:国家电网公司科技项目(XT71-18-036) |
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| Stability control strategy for conversion from grid-tied to island operation of asynchronous interconnected power grids based on VSC-HVDC |
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CHEN Qichao1, LI Hui1, WU Wenchuan2, LIU Jie3, ZHANG Yi3, WANG Fei1, SUO Zhiwen1, JIANG Weiyong1
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1.State Power Economic Research Institute, Beijing 102209, China;2.State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;3.State Grid Corporation of China, Beijing 100031, China
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| Abstract: |
| Taking Yu-E back to back VSC-HVDC project as the case, the main system stability issues and characteristics under VSC-HVDC island operation formed by AC tie-line N-2 faults are analyzed. An electromagnetic transient simulation model is established, which can accurately reflect actual characteristics of Yu-E VSC-HVDC system and power grid of Jiupan district. The transient characteristics for conversion from grid-tied to island operation are emphatically researched, and the sensitivity analysis of the key influencing factors of generating scheme, load condition and unit backup is carried out. By means of time-domain simulation analysis method, the precontrol range of AC tie-line power flow under different operation modes and different measures is given to ensure the system stability for conversion from grid-tied to island operation. On this basis, the stability control strategy for conversion from grid-tied to island operation in Jiupan district is proposed, which provides technical support for the safe and stable operation of Yu-E VSC-HVDC system. |
| Key words: asynchronous interconnection VSC-HVDC island additional frequency control power emergency control stability control strategy |
