• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2016, Vol. 37 ›› Issue (10): 93-.doi: 10.3969/j.issn.1000-7229.2016.10.013

• 输配电技术 • 上一篇    下一篇

基于等效开环过程的VSC-HVDC阻尼控制器协调控制鲁棒稳定性研究

李志晗,张英敏,李兴源,邓旗   

  1. 四川大学电气信息学院,成都市 610065
  • 出版日期:2016-10-01
  • 作者简介:李志晗(1994),男,硕士研究生,主要研究方向为电力系统稳定与控制、高压直流输电; 张英敏(1974),女,副教授,主要研究方向为高压直流输电、电力系统稳定与控制; 李兴源(1945),男,教授,博士生导师,主要研究方向为电力系统稳定与控制、高压直流输电、新能源并网方式; 邓旗(1989),男,硕士研究生,主要研究方向为电力系统稳定与控制、高压直流输电。
  • 基金资助:
    国家电网公司科技项目(SGRIZLKJ[2015]457)

Coordinated Control Robust Stability for VSC-HVDC Damping Controller Based on Effective Open-Loop Process Theorem

LI Zhihan, ZHANG Yingmin, LI Xingyuan, DENG Qi   

  1. School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China
  • Online:2016-10-01

摘要: 针对包含柔性直流(voltage source converter-high voltage direct current,  VSC-HVDC)的交直流互联系统区间低频振荡现象,通过多变量系统等效开环过程(effective open-loop process,EOP)理论,将多变量系统回路方程转换为单变量系统回路方程,建立起各回路独立的数学模型。由于包含VSC-HVDC 的系统是多输入多输出复杂非线性系统,其中各回路阻尼控制器之间可能存在不协调的问题,基于小增益定理,在实现系统等效开环过程控制的基础上,提出判断各附加阻尼控制器间协调控制鲁棒稳定性指标;设计能抑制低频振荡且能协作运行的发电机电力系统稳定器(power system stabilizer, PSS)附加阻尼控制器和VSC-HVDC附加阻尼控制器。最后在PSCAD/EMTDC中搭建包含VSC-HVDC的交直流四机两区域系统,仿真验证所提指标的有效性和所设计控制器的实用性。

关键词: 柔性直流, 等效开环过程, 小增益定理, 附加阻尼控制器, 低频振荡

Abstract:  According to the phenomenon of low frequency oscillation in the AC-DC interconnected system with voltage source converter-high voltage direct current  (VSC-HVDC), this paper converts multi-variable system loop matrix equation into many single variable system loop equation, and establishes the independent mathematical models of each circuit, based on multi-variable system effective open-loop process (EOP) theorem. For the potential uncoordinated problem of each loop controller in multi-input multi-output (MIMO) nonlinear system which contains VSC-HVDC, this paper proposes a coordinated control robust stability index of each supplementary damping controller based on small gain theorem and EOP theorem. Then, the power system stabilizer (PSS) supplementary damping controller and VSC-HVDC supplementary damping controller in cooperative operation was designed to restrain low frequency oscillation. Finally, AC/DC four machine two-area system with a VSC-HVDC in PSCAD /EMTDC has been established,  and  the validity of the proposed indicators and the feasibility of the designed controller have been verified through simulation.

Key words: VSC-HVDC, effective open-loop process, small gain theorem, supplementary damping controller, low frequency oscillation

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