直流多落点系统自抗扰附加阻尼控制

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摘要提出将自抗扰控制技术应用到直流多落点系统,通过其附加控制以提高系统的阻尼水平。首先采用扰动测试法,找出系统的最佳控制地点。然后采用总体最小二乘-旋转不变技术(TLS-ESPRIT)辨识出系统数学模型,根据奇异值降阶理论对系统降阶,降阶后得到二维低阶被控系统,并将其转换为状态空间形式,据此设计出抑制系统低频振荡的HVDC自抗扰附加阻尼控制器。由于自抗扰控制技术具有对系统扰动实时估计性能,并将估计出的实时扰动量补偿到控制中去,因此该控制器具有比现有常规控制器抗扰动能力强的优点。以三直流三机和四机两区域系统为例进行时域仿真,结果表明HVDC自抗扰附加控制器相比传统PID控制器具有更强的鲁棒性。

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	李从善
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	李文峰

关键词 ：自抗扰控制器, 直流多落点系统, 低频振荡, 汉克尔奇异值降阶

Abstract：The auto-disturbance rejection control(ADRC) technique is applied to the multi-HVDC system’s supplementary control to improve the damping level of system.Firstly,the best place of the control system is found using the disturbance test method.Then the total least squares estimation of the rotational invariance technique (TLS-ESPRIT) is used to identify the mathematical model of the system.Based on the singular value reduction theory,the system has been reduced to the two-dimensional low order system and transformed into a state space form.The ADRC supplementary damping controller for HVDC system’s low frequency oscillation is then designed.Because ARDC technique can estimate the disturbance of the system in real-time,which can also be compensated to the control system in real time,the controller has better anti disturbance ability than the existing conventional controller.A system with three HVDC and three generators is used as an example for the time domain simulation.The results show that the robustness of the ADRC controller for HVDC is higher than that of the traditional PID controller.

Key words： Auto disturbance rejection controller multi-HVDC system low frequency oscillation singular value theory

收稿日期: 2014-11-15 出版日期: 2015-05-25

PACS:

TM7

基金资助:国家电网公司科技重大专项(SGCC-MPLG027-2012)资助项目。

通讯作者: 刘天琪女,1962生,教授,博士生导师,研究方向为高压直流输电、电力系统稳定与控制方面的研究。

作者简介: 李从善男,1985生,博士研究生,研究方向为电力系统扰动监测及稳定与控制方面的研究。刘天琪女,1962生,教授,博士生导师,研究方向为高压直流输电、电力系统稳定与控制方面的研究。

引用本文:

李从善, 刘天琪, 刘利兵, 李兴源, 李文峰. 直流多落点系统自抗扰附加阻尼控制[J]. 电工技术学报, 2015, 30(7): 10-17. Li Congshan, Liu Tianqi, Liu Libing, Li Xingyuan, Li Wenfeng. A Auto-disturbance Rejection Controller of Multi-HVDC. Transactions of China Electrotechnical Society, 2015, 30(7): 10-17.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I7/10

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