蒸汽发生器水位改进分数阶控制器研究

郭丹; 夏虹

doi:10.7538/yzk.2017.youxian.0660

蒸汽发生器水位改进分数阶控制器研究

郭丹,
夏虹^*

哈尔滨工程大学核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001

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- 刊出日期: 2018-07-19

Study on Improved Fractional Order Controller of Steam Generator Water Level

GUO Dan,
XIA Hong^*

Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China

摘要

摘要: 蒸汽发生器在瞬态扰动时存在严重的虚假水位现象，增加了低功率水位控制的难度。为研究蒸汽发生器低功率水位控制问题，利用线性参数变化理论，建立了时变的多胞线性参数变化模型。在此模型基础上，提出了分数阶控制器。依据分数阶微积分理论，设计了串级分数阶PI^λD^μ控制器。根据Oustaloup间接离散化方法实现了分数阶PI^λD^μ控制并对Oustaloup方法进行了改进。研究了在负荷变化时，内环和外环4个阶次参数以及改进算法后2个参数变化对系统控制性能的影响。在不同功率区间，相同负荷变化的情况下，对改进后的串级分数阶PI^λD^μ控制器进行了仿真实验。结果表明，所设计的改进串级分数阶PI^λD^μ控制器能有效抑制干扰，分数阶微积分算子的阶次以及改进的Oustaloup方法引入的系数对控制效果均有一定影响，合理调节参数能明显改善系统的控制性能。
- 蒸汽发生器 ,
- 水位控制 ,
- 分数阶微积分 ,
- Oustaloup方法 ,
- 分数阶控制器 ,
- 参数变化影响
Abstract: The steam generator exists the serious false water level phenomenon in a transient disturbance. The difficulty of controlling water level in the low power increases. In order to study the low power water level control problem of steam generator, a time-varying linear parameter change model was established by using linear parameter change theory. A fractional order controller for the steam generator model was proposed based on this model. According to fractional calculus theory, fractional order PI^λD^μ was adopted. Oustaloup indirect discretization method was used to realize the fractional order PI^λD^μ control and the Oustaloup method was improved. The influence of four order parameters of inner-loop and outer-loop and two parameters of the improved method varying on system control performance was studied when the load changed. In different power intervals, the simulation experiments of the improved cascade fractional PI^λD^μ controller were carried out in the case of the same load change. The analysis result shows that the designed improved cascade fractional PI^λD^μ controller can resist interference effectively. The four order parameters of inner-loop and outer-loop and two parameters of the improved method varying influence control effect to a certain degree. Adjusting the parameters reasonable can improve the transient characteristics of the system obviously.
- steam generator ,
- water level control ,
- fractional calculus ,
- Oustaloup method ,
- fractional order controller ,
- parameter variation effect

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参考文献(15)

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蒸汽发生器水位改进分数阶控制器研究

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Study on Improved Fractional Order Controller of Steam Generator Water Level

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