交直流联合输电系统中HVDC的自适应全局快速Terminal滑模控制

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摘要为了提高阻尼系数未知的交直流联合输电系统的运行稳定性,对系统未知参数进行动态估计,同时考虑到自适应backstepping滑模控制器的不足,采用自适应全局Terminal滑模控制方法,设计了一种新型直流输电系统的非线性附加控制器。该方法通过快速调节直流输电线路的输送功率,实现对整个系统稳定性的调节;综合线性滑动模态与非线性滑动模态的优点,使失稳系统能够快速、精确地收敛至平衡状态;考虑系统受具有未知上界的不确定小扰动及三相短路大扰动的影响,分别对干扰未知上界及系统未知参数进行实时动态估计。通过与自适应backstepping滑模控制器进行数值仿真对比,结果表明,该控制器具有更小的超调量,更短的控制响应时间,更准确的未知参数估计性能和更强的鲁棒性,能够更有效地提高系统的稳定性。

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	郝建红
	米昕禾
	汪筱巍

关键词 ：交直流联合输电系统, 直流调制, 滑模控制, 参数估计, 鲁棒性

Abstract：In this paper, a new kind of nonlinear additive controller for high voltage direct current (HVDC) transmission system using adaptive global terminal sliding mode control method is designed in AC-DC parallel transmission system with unknown damping coefficients and estimate them dynamically to improve system stability. The transmission power is improved by rapidly adjusting the transmission power of DC side to adjust the stability of the whole system. The controller designed in this paper has both advantages of linear sliding mode and nonlinear sliding mode, which can make AC-DC system converge quickly and accurately to the equilibrium state. The influence of uncertain small disturbance with unknown upper bond and three phase short-circuit fault have also been taken into account, values of unknown upper bound and unknown parameters are estimated in real time respectively. Compared with the adaptive backstepping sliding mode controller, the simulation results show that the controller designed in this paper has smaller overshoot, shorter control response time, superior estimation performance and stronger robustness. In a word, It can improve the stability of the system more effectively.

Key words： AC-DC parallel transmission system DC modulation sliding mode control parameter estimation robustness

收稿日期: 2016-05-29 出版日期: 2017-06-20

PACS:

TM712

基金资助:国家自然科学基金资助项目(61372050)

通讯作者: 米昕禾女,1992年生,硕士研究生,研究方向为电力系统非线性动态电压稳定分析及控制。E-mail:mixinhe@yeah.net

作者简介: 郝建红女,1960年生,教授,博士生导师,研究方向为电力系统低频振荡及非线性控制、混沌机理及其应用等。E-mail:jianhonghao@ncepu.edu.cn

引用本文:

郝建红, 米昕禾, 汪筱巍. 交直流联合输电系统中HVDC的自适应全局快速Terminal滑模控制[J]. 电工技术学报, 2017, 32(11): 8-16. Hao Jianhong, Mi Xinhe, Wang Xiaowei. Adaptive Global Fast Terminal Sliding Mode Control for HVDC in AC-DC Parallel Transmission System. Transactions of China Electrotechnical Society, 2017, 32(11): 8-16.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I11/8

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