Application of Beat Control with Plug-in Repetitive Controller in Grid-connected Inverter
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摘要: 无差拍控制的光伏并网逆变器,其存在电流预测复杂问题和控制延时问题,可分别以采用差拍控制和减小控制增益为解决措施,但会使输出电流相位落后于参考电流,为进一步解决相位落后问题,提出了一种内置重复控制器的差拍控制方法,并给出了重复控制器的设计过程。该方法把相位落后视为一种周期性扰动,利用重复控制对周期性扰动的校正作用,通过内置重复控制器来抑制相位落后和电网电压谐波等周期性扰动因素,结合了无差拍控制和重复控制二者的优势。仿真结果表明了该方法的可行性和有效性。Abstract: Photovoltaic grid-connected inverter controlled by deadbeat control has such problems as current predict complexity and control delay, and the beat control and decreased control gain are applied to solve these two problems respectively, but the phase of output current will lag behind that of the reference current. In order to solve the problem of phase lag, a beat control strategy with plug-in repetitive controller is presented in this paper, and the design process of the repetitive controller is also given. According to this strategy, the phase lag is taken as a kind of periodic disturbance, the plug-in repetitive controller is used to restrain such periodic disturbance as phase lag and network voltage harmonic by repetitive control, which combines both advantages of deadbeat control and repetitive control. Simulation results verify the feasibility and validity of the proposed strategy.
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Keywords:
- :grid-connected inverter /
- deadbeat control /
- repetitive controller /
- phase lag
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期刊类型引用(2)
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百度学术
2. 代满意, 陈华. 微电网系统并网逆变器优化控制仿真研究. 计算机仿真. 2018(07): 74-78 . 百度学术
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