微燃机三联供机组的多变量鲁棒自适应负荷跟踪控制

Robust Adaptive Controller for Multivariable Load Tracking in MGT-Li Br CCHP

为提高微燃机–溴化锂双效吸收式制冷机三联供机组(micro gas turbine-LiBr double effect absorption refrigerating machine combined cooling,heating and power system,MGT-LiBr CCHP)在多扰动条件下的大范围冷热电负荷跟踪能力,提出一种基于Hammerstein模型改进设计的L_1鲁棒自适应控制方法。首先采用Hammerstein块结构建立受控系统的非线性动态仿真模型,然后利用Hammerstein模型的特殊结构求解多变量非仿射L_1鲁棒自适应控制器的假设条件,进而得到可靠的控制器参数。该文利用该方法设计了MGT-LiBr CCHP的冷热电负荷跟踪控制器,仿真实验验证了其具有较强的大范围多负荷跟踪、鲁棒稳定和扰动抑制性能,可作为维护终端一体化集成供能系统可靠运行的先进备选控制方案。

In order to improve the large-range multiple-load following capability of the micro gas turbine-LiBr double effect absorption refrigerating machine combined cooling, heating and power system （MGT-LiBr CCHP） in the presences of disturbances, this paper proposed a novel Ll robust adaptive control whose design method is improved by using Hammerstein model. First, in this method, the block-oriented Hammerstein modeling is adopted to build the nonlinear dynamic simulation model of controlled systems. Then an assumption of the multivariable non-affine LI robust adaptive control is solved out by making use of the particular structure of Hammerstein model and thus some reliable controller parameters are obtained. Based on the way, a cooling, heating and power load-tracking controller was built and verified on a series of simulation scenarios. The results demonstrate that the controller can track large-range multiple-load changes well and achieve fast adaptation, robust stability and effective disturbance rejection. Therefore the proposed robust adaptive control strategy provides an advanced alternative solution for maintaining reliable operations of terminal integrated power supply systems.