基于反馈线性化的高性能逆变器数字控制方法  

Digital Control Method for High-performance Inverters Based on Feedback Linearization

作　　者：姚玮[1] 陈敏[1] 牟善科[2] 张军明[1] 钱照明[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]华东电网有限公司,上海市黄浦区200002

出　　处：《中国电机工程学报》2010年第12期14-19,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50907061)~~

摘　　要：传统逆变器控制方法大多基于小信号原理,其频域模型并不能保证系统在大信号扰动下的稳定性。提出一种新型的基于逆变器大信号模型的反馈线性化控制策略,可改善逆变器在输入电压波动和输出负载扰动下的输出特性,并具有良好的电压和电流跟随特性。根据逆变器电路的大信号方程,分析提出数字控制器的线性化反馈结构及其参数设计方法。与传统控制结构相比,此控制策略在动态响应和稳态精度上更具优越性,并具有较强的鲁棒性。仿真与实验结果均验证了该策略的正确性和有效性。Most of traditional control methods for inverters are based on the small signal theory, whose frequency domain model can＇t guarantee the system stability under the large signal disturbances. A feedback linearization control strategy was presented based on the large signal model of inverters, which can improve system adaptability and stability under complex load conditions and disturbances. This control system can track the voltage and current references perfectly. Based on the large signal equations of the inverter system, a linear feedback structure of digital controller and a parameter design method was proposed. Compared with traditional control structure, the proposed controller can achieve a robust system with better performance both on dynamic response and steady state accuracy. The simulation and experimental results confirm the validity of this strategy.

关 键 词：逆变器 反馈线性化 动态性能 鲁棒性 非线性负载 

分 类 号：TM46[电气工程—电器]