论文信息 - Research on discrete PR controller with LCL filter based on DRNN for photovoltaic grid-connected inverter

Research on discrete PR controller with LCL filter based on DRNN for photovoltaic grid-connected inverter

The single-phase photovoltaic grid-connected inverter with LCL filter is studied as the research object in this paper. Based on the nonlinear and time-varying characteristics of photovoltaic grid-connected system, the double closed-loop control strategy of PR control is presented. For the PR controller of fixed parameters is unable to adapt to changes in power network parameters, and the system control performance cannot be optimized. A PR control method based on DRNN of dynamic self-tuning is presented and its control algorithm is given. DRNN is based on the two-step RPE algorithm, which has a faster convergence rate than the BP algorithm using the first-order gradient algorithm. The simulation results prove that this control strategy has a good quality of the output current and fast performance in dynamic response, the resonance of grid current is effectively avoided and high in-grid power factor is achieved.

Shuo Shi | Zhenxiong Zhou

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