一种基于自适应预测控制的电流型数字功率放大器  

A Current Digital Power Amplifier Based on Self-Adaptive Predictive Control

作　　者：张炳达[1] 袁奎[1] 

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电工技术学报》2015年第16期162-167,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51277128)

摘　　要：利用最小二乘法在线估计电流型数字功率放大器滤波电感和负荷参数,根据开关周期前后输出电流值与功率开关管提供的平均输出电压之间的关系以及输出电流指令值确定功率开关管的通断时间,并依预测的输出电流方向选择相应的死区插入方法。针对自适应预测控制算法计算量大的特点,采用可编程序逻辑器件EP3C25Q240C8搭建控制系统,并开发了一种流水线级数较少的乘累加器。结果表明,研制的电流型数字功率放大器具有动态响应快、控制准确度高等特点。Least square method is used to online estimate filter inductor and load parameter ot current digital power amplifier. According to the instruction current, together with the relationship between the output current in switching cycle and the average voltage provided by switch, on-off time of switch is determined. Different switch is selected to insert dead time according to the direction of predictive output current. For the large calculations of self-adaptive predictive control, control system is set up with field-programmable gate array EP3C25Q240C8 and a less pipeline stages multiply- accumulator is developed. The results show that the developed current digital power amplifier has the fast response and high control accuracy.

关 键 词：变电站仿真系统 功率放大器 自适应 预测控制 可编程逻辑器 

分 类 号：TM743[电气工程—电力系统及自动化]