| 引用本文: | 王晓宇,杨杰,吴亚楠,庞辉,孔明.渝鄂背靠背柔性直流对系统次同步振荡特性的影响分析[J].电力自动化设备,2019,39(7): |
| WANG Xiaoyu,YANG Jie,WU Yanan,PANG Hui,KONG Ming.Effect analysis of back-to-back flexible HVDC connecting Chongqing and Hubei Power Grid on sub-synchronous oscillation characteristics[J].Electric Power Automation Equipment,2019,39(7): |
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| 摘要: |
| 分析渝鄂背靠背柔性直流输电工程投运前后奉节电厂发生次同步振荡的潜在因素；利用复转矩系数法与时域仿真相结合的方法计算分析工程投运前后各个频段系统阻尼特性，并从机理上分析工程投运前后奉节机组发生次同步振荡的风险。在此基础上，利用柔性直流的多维度可控、灵活快速的控制特性，设计混合式阻尼控制策略。对典型工况进行仿真，结果表明所提控制策略相比传统控制策略能够使系统更快恢复到稳态。 |
| 关键词: 柔性直流输电 次同步振荡 阻尼特性 混合式阻尼控制 |
| DOI：10.16081/j.issn.1006-6047.2019.07.028 |
| 分类号:TM721.1 |
| 基金项目:国家重点研发计划“智能电网技术与装备”专项(2016YFB0900900) |
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| Effect analysis of back-to-back flexible HVDC connecting Chongqing and Hubei Power Grid on sub-synchronous oscillation characteristics |
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WANG Xiaoyu, YANG Jie, WU Yanan, PANG Hui, KONG Ming
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State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102200, China
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| Abstract: |
| The potential factors causing subsynchronous oscillation in Fengjie plants are analyzed before and after the operation of back-to back flexible HVDC transmission project connecting Chongqing and Hubei Power Grid. The damping characteristics of system in each frequency band are analyzed by complex torque coefficient approach combined with time-domain simulation, and the risk of sub-synchronous oscillation of Fenjie plants before and after the project operation is analyzed in terms of mechanism. On this basis, a hybrid damping control strategy is designed using multi-dimensional controllable characteristic, flexible and fast control characteristic of flexible HVDC. The typical working conditions are simulated, and results show that the proposed control strategy can make the system recover to steady state more quickly than the traditional control strategy. |
| Key words: flexible HVDC sub-synchronous oscillation damping characteristics hybrid damping control |
