电力系统自动化2017，Vol.41Issue(14)：182-189,8.DOI:10.7500/AEPS20161130003
VSC-HVDC变量软约束期望区间跟踪的EMPC设计
Design for Explicit Model Predictive Control Based on Expected Interval Tracking and Variable Soft Constraint of VSC-HVDC System
摘要
Abstract
Based on the nonlinear relationship between the voltage and current of the DC link,a piecewise affine model (PWA) of voltage source converter based high-voltage direct-current (VSC-HVDC) system is developed.According to the characteristics of fast dynamic change of PWA system with state and input constraints,this paper makes up for the shortcomings of model predictive control (MPC) causing slowed-down system response and degraded real time performance.Explicit model predictive control (EMPC) combined with off-line calculation and on line analysis is used to transform repeated online rolling optimization calculation into a simple table lookup process.The output trajectory of the VSC-HVDC system by means of expected interval tracking deviation and adding the variable soft constraints is optimized.Simulation results show that the explicit model predictive controller has good dynamic performance and steady performance,while able to suppress fluctuations of output trajectory.Compared with the MPC,the dynamic response of EMPC is faster,and the real-time of EMPC is stronger.关键词
电压源换流器型高压直流/显式模型预测控制/期望区间/变量软约束/实时性Key words
voltage source converter based high voltage direct-current (VSC-HVDC)/explicit model predictive control (EMPC)/expected interval/variable soft constraint/real time引用本文复制引用
张虹,刘旭,张思雨,王鹤,庞健,辛业春..VSC-HVDC变量软约束期望区间跟踪的EMPC设计[J].电力系统自动化,2017,41(14):182-189,8.基金项目
国家自然科学基金资助项目(51507029) （51507029）
吉林省发改委研究项目(2015Y080).This work is supported by National Natural Science Foundation of China (No.51507029) and Project of Jilin Provincial Development and Reform Commission (No.2015Y080). （2015Y080）
