摘要
Z源逆变器由于其强大的升/降压能力而得到广泛应用,传统的控制策略通常采用电压外环和电流内环构成的双环PI控制。但传统的双环PI控制无法达到较高的控制精度且并网电流谐波畸变率较高。重复控制具有抑制周期性谐波干扰的优点,而模糊控制可根据非线性系统特点在线调整控制参数,于是提出了一种基于重复控制和模糊PI控制相结合的新型控制策略,可较好地抑制谐波干扰,并具有较高的控制精度。通过仿真研究,与传统的方法比较,证明所提方法的有效性和正确性。
Z source inverter has been wildly used because of its powerful boost and buck capability. The traditional control strategy often uses the double loop PI control of outer voltage loop and inner current loop. It was hard to achieve higher control accuracy while using the control of traditional double PI loop and the harmonic distortion rate of grid-connected current was high. The periodic harmonic interference could be better restrained with the repetitive control and the controls parameter could be adjusted online by fuzzy control according to characteristic of nonlinear system. As a result, a new control strategy based on repetitive control and fuzzy PI control was proposed. The harmonic interference could be better restrained by the strategy and the control accuracy was higher. Compared with the traditional method, the effectiveness and validity of the proposed method were verified through the simulation experiment.
出处
《电机与控制应用》
北大核心
2016年第5期22-27,共6页
Electric machines & control application
基金
国家自然科学基金(61203224)
上海市电站自动化技术重点实验室开放课题(13DZ2273800)
上海市科技创新行动技术高新技术领域重点项目(14511101200)
上海市重点科技攻关计划(14110500700)
上海自然科学基金(13ZR1417800)
关键词
重复控制
模糊PI控制
Z源逆变器
并网
repetitive control
fuzzy PI control
Z source inveter
grid-connected
