VSC-HVDC变量软约束期望区间跟踪的EMPC设计

发布时间：2018-05-13 22:35

本文选题：电压源换流器型高压直流 + 显式模型预测控制　；参考：《电力系统自动化》2017年14期

【摘要】：根据直流线路电压与电流之间的非线性关系,建立了电压源换流器型高压直流(VSCHVDC)输电系统的分段仿射模型。针对带状态和输入约束的分段仿射系统动态变化快的特点,弥补模型预测控制滚动优化计算使得系统响应速度变慢、实时性降低的缺点。采用离线计算和在线分析相结合的显式模型预测控制方法,将反复在线滚动优化计算转化为简单的查表过程。通过期望区间跟踪偏差项和添加变量软约束的方法优化VSC-HVDC系统的输出轨迹。仿真结果表明,所设计的显式模型预测控制器具有良好的动态性能和稳态性能,能够较好地抑制输出轨迹的波动,与模型预测控制相比,动态响应更快,控制的实时性更强。
[Abstract]:Based on the nonlinear relationship between voltage and current of DC transmission line, a piecewise affine model of HVDC transmission system with voltage source converter is established. Aiming at the fast dynamic change of piecewise affine systems with state and input constraints, this paper makes up for the shortcomings of the rolling optimization calculation of model predictive control, which makes the system response speed slow and real-time reduced. An explicit model predictive control method combining off-line calculation and on-line analysis is used to transform the repeated on-line rolling optimization into a simple table-searching process. The output trajectory of VSC-HVDC system is optimized by using the expected interval tracking deviation term and adding variable soft constraints. The simulation results show that the designed explicit model predictive controller has good dynamic and steady performance, and can restrain the fluctuation of output trajectory. Compared with the model predictive control, the dynamic response is faster and the control is more real-time.
【作者单位】：东北电力大学电气工程学院;国网内蒙古东部电力有限公司电力科学研究院;
【基金】：国家自然科学基金资助项目(51507029) 吉林省发改委研究项目(2015Y080)~~
【分类号】：TM721.1

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