基于FPGA广义预测比例-积分-微分控制在特种电源中的应用

摘要

针对数字控制的优势及大型超导托卡马克装置(EAST)中性束注入(NBI)系统中高压缓冲器偏置电源(特种电源)的控制要求,推导一种具有比例-积分-微分(PID)控制和广义预测控制(GPC)结构形式的广义预测PID控制(GPCPID)算法.详细介绍数字PID控制器及GPCPID控制器的设计、GPCPID算法的现场可编程门阵列(FPGA)编程实现及 Modelsim仿真.实际应用测试表明,GPCPID能较好地应用在开关电源控制领域,在动态响应特性及稳定性方面,GPCPID算法优于PID控制算法.%According to the advantages of digital control as well as the control requirements of high voltage buffer bias power supply (special power supply) in experimental advanced superconducting Tokamak neutral beam injection (EAST-NBI) system, this paper derived a kind of generalized predictive proportion-integration-differentiation (PID) control algorithm with PID structure and generalized predictive control. Then, this paper introduces the design of GPCPID and digital PID controllers, and the programming and Modelsim simulation of GPCPID based on field programmable gate array (FPGA). The final results of the experiments demonstrate that the GPCPID control can be well applied in the field of switching power supply, and the GPCPID control algorithm has a better performance than PID control algorithm in dynamic response and stability.