多端高压直流输电系统自适应无源控制
Adaptive passive control for multi-terminal high voltage direct current systems
摘要点击 361  全文点击 329  投稿时间:2016-06-13  修订日期:2017-01-23
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DOI编号  10.7641/CTA.2017.60398
  2017,34(5):637-647
中文关键词  自适应源控制  扰动观测器  阻尼系统  多端高压直流输电系统系统
英文关键词  adaptive passive control  perturbation observer  damping system  VSC–MTDC systems
基金项目  国家重点基础研究发展计划(“973”计划)(2013CB 228205), 国家自然科学基金项目(51477055), 昆明理工大学自然科学研究基金资助项目—–省 人才培养计划(KKSY201604044), 云南省教育厅科学研究基金项目(KKJB201704007)资助.
学科分类代码  
作者单位E-mail
杨博 昆明理工大学电力工程学院 yangbo_ac@outlook.com 
黄琳妮 华南理工大学电力学院  
张孝顺 华南理工大学电力学院  
余涛 华南理工大学电力学院 taoyu1@scut.edu.cn 
中文摘要
      本文提出了一种基于扰动观测器的自适应源控制(perturbation observer-based adaptive passive control, POAPC), 并将其用于增加电压源型多端高压直流输电系统(voltage source converter-based multi-terminal high voltage direct current, VSC–MTDC)的阻尼. 首先定义一个扰动项, 其包含多端口间的相互作用、未建模动态和未知时变外 界干扰的综合效应. 之后扩展一个虚拟状态来表征该扰动项, 进而设计一个扰动观测器对其进行快速在线估计. 该 方法通过源化向每个端口注入附加阻尼以改善系统暂态响应, 并且不需要精确的系统模型或全局状态测量. 基 于四端VSC–MTDC系统的4种算例表明: 与传统PI控制、源控制以及基于扰动观察器的滑动模态控制相比, POAPC由于不需要精确系统模型及全局状态测量而具有更高的应用灵活性; 在各种运行条件下通过有效减少有功 功率P1和功功率Q1控制误差和超调量来获得更优的控制性能; 在系统参数不确定场景下将有功功率P2的峰值 变化从11%减少至接近0, 鲁棒性更强.
英文摘要
      This paper develops a perturbation observer-based adaptive passive control (POAPC), which is applied to improve the system damping of voltage source converter-based multi-terminal high voltage direct current (VSC–MTDC) systems. A perturbation term is firstly defined to aggregate the combinatorial effect of interactions among each terminals, unmodelled dynamics and unknown time-varying external disturbances. Then an extended state is employed to represent the perturbation, which can be rapidly estimated online via a perturbation observer. Furthermore, an extra system damping can be injected into each terminal to improve the transient response through the passivation, while POAPC does not require an accurate system model and measurements of full states. Four case studies are undertaken on a four-terminal VSC– MTDC system, which demonstrate that POAPC can provide a better control performance with greater robustness over that of conventional proportional-integral (PI) control conventional passive control, and perturbation observer based slidingmode control (POSMC). POAPC can effectively reduce the control error and overshoot of active power and reactive power. Meanwhile, its P2 peak value is reduced from 11% to around 0%, such that a great robustness can be realized.