| 引用本文: | 李志晗,张英敏,李兴源.基于H∞回路成形法的VSC-HVDC附加鲁棒阻尼控制器设计[J].电力系统保护与控制,2018,46(2):124-130.[点击复制] |
| LI Zhihan,ZHANG Yingmin,LI Xingyuan.Design of additional robust damping controller for VSC-HVDC based on H∞ loop shaping[J].Power System Protection and Control,2018,46(2):124-130[点击复制] |
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| 摘要: |
| 针对包含柔性直流(VSC-HVDC)的交直流输电系统中存在的低频振荡问题，提出一种基于H∞回路成形法的方法设计附加鲁棒阻尼控制器。首先采用最小二乘-旋转不变方法(TLS-ESPRIT)辨识出系统的降阶模型和振荡模态，然后针对该模型应用H∞回路成形法及规范互质分解技术进行了鲁棒阻尼控制器设计。最后在PSCAD/EMTDC中搭建包含柔性直流的交直流四机两区域输电系统。仿真结果表明，基于H∞回路成形法的VSC-HVDC鲁棒阻尼控制器在不同扰动下对系统低频振荡具有良好的抑制效果，鲁棒性较强，且控制器采用输出反馈，便于工程实践。 |
| 关键词: 柔性直流 最小二乘-旋转不变技术 鲁棒阻尼控制 H∞回路成形 低频振荡 |
| DOI：10.7667/PSPC162133 |
| 投稿时间：2016-12-31修订日期：2017-01-26 |
| 基金项目:国家电网公司科技项目(SGQHJY00GHJS1400044) |
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| Design of additional robust damping controller for VSC-HVDC based on H∞ loop shaping |
| LI Zhihan,ZHANG Yingmin,LI Xingyuan |
| (School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China) |
| Abstract: |
| For the phenomenon of low frequency oscillation in the AC-DC interconnected system which contains VSC-HVDC, a method based on H∞ loop shaping is proposed to design the additional robust damping controller. The reduced order model of the system and the related oscillation frequency are identified by total least squares-estimation on signal parameters via rotational invariance techniques. The robust damping controller is designed for the reduced order model of the system based on H∞ loop shaping and normalized coprime factorization. Finally, a simulation created in PSCAD/EMTDC which is a four-machine two-area system with a VSC-HVDC link. The results show that the robust damping controller designed for VSC-HVDC can well suppress the low frequency oscillation of the system in different disturbances. The controller shows good control performance and strong robustness; furthermore, output feedback control is utilized in the design of the controller, being convenient for practical application. This work is supported by Science and Technology Project of State Grid Corporation of China (No. SGQHJY00GHJS1400044). |
| Key words: VSC-HVDC TLS-ESPRIT robust damping control H∞ loop shaping low frequency oscillation |
