Linear Quadratic Regulator Control of Triple-Active Bridge Converter
To improve the dynamic performance in the decoupling control of triple-active bridge converter when the working condition is far from the operating point and the decoupling matrix changes,a control method of triple-active bridge based on linear quadratic regulator(LQR)is proposed.The state-space model is established by circuit equivalent transformation and power transmission equation among each port,and the LQR control method based on state feedback is further designed to control the power flow while maintaining the stability voltage of each port irrespective of the operating point.The control performance of the method proposed in this paper is verified by simulation control.Compared with traditional PI decoupling control,the proposed method has better control performance when working conditions change.
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