| 引用本文: | 顾威,李兴源,陈建国,等.基于瞬时无功理论的SVC抑制次同步振荡的附加控制设计[J].电力系统保护与控制,2015,43(5):107-111. |
| GU Wei,LI Xingyuan,CHEN Jianguo,et al.Additional control design of SVC for mitigating subsynchronous oscillation based on instantaneous reactive power theory[J].Power System Protection and Control,2015,43(5):107-111 |
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| 摘要: |
| HVDC解决了长距离输电中电压降低、线损加大、无功补偿等问题，却又给系统带来了次同步振荡的危险。SVC在补偿HVDC无功功率需求的同时也可以通过增加附加控制来抑制可能产生的次同步振荡。为了使SVC的补偿精确，SVC附加控制的输入信号取易于获得的电压电流信号且有明显的抑制效果，将采用基于瞬时无功理论的方法来设计SVC的控制，消除不对称分量和其他频率下谐波分量的影响，使得控制效果更精准。以向上直流降功率25%单极孤岛运行方式为例，验证了基于瞬时无功理论设计的SVC控制对次同步振荡抑制的有效性。 |
| 关键词: 瞬时无功理论 静止无功补偿器 次同步振荡 高压直流输电 |
| DOI：10.7667/j.issn.1674-3415.2015.05.017 |
| 分类号: |
| 基金项目:南方电网公司项目(K-GZ2012-115) |
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| Additional control design of SVC for mitigating subsynchronous oscillation based on instantaneous reactive power theory |
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GU Wei1, LI Xingyuan2, CHEN Jianguo1, MU Zilong2
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1.Guizhou Electric Power Research Institute, Guiyang 550002, China;2.School of Electrical and
Information, Sichuan University, Chengdu 610065, China
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| Abstract: |
| High voltage direct current (HVDC) solves the problems of voltage reducetion, line loss imcrement and reactive power compensation in long-distance transmission, but it may cause subsynchronous oscillation. Static var compensators (SVC) can compensate reactive power to HVDC and mitigate subsynchronous oscillation with additional control. In order to gain accurate control and easily get signal of voltage and current for additional control, instantaneous reactive power theory should be used to eliminate the influence of harmonic component or asymmetric component. Xiangshang HVDC 75% DC power operation model is applied to verify available mitigation of SVC to subsynchronous oscillation. |
| Key words: instantaneous reactive power theory static var compensators (SVC) subsynchronous oscillation high voltage direct current (HVDC) |
