This paper presents a novel strategy to indirectly control the peak dc-link voltage (PDV) of grid-connected quasi-Z-source (qZS) inverter supplied with renewable energy sources (RES). The method is directed to indirectly determine and regulate the pulsating PDV through the qZS network capacitor voltages. The small signal model is developed by representing ac- and dc-sides separately. The ac-side control is designed with higher bandwidth to avoid interference from dc-side. The dc-side control utilizes shoot-through duty ratio to PDV transfer function and controller is designed to minimize the effect of its right-half-plane zero (RHPZ) characteristics. The gating signals are realized through maximum constant boost control in conjunction with one-sixth of third harmonic injection. The strategy is implemented through MATLAB/Simulink and is verified experimentally with real-time simulations (RTSs) in OPAL-RT.

中文翻译：

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通过可再生能源供电的并网 qZS 逆变器直流母线峰值电压间接控制的新策略

本文提出了一种间接控制由可再生能源 (RES) 供电的并网准 Z 源 (qZS) 逆变器的峰值直流链路电压 (PDV) 的新策略。该方法旨在通过 qZS 网络电容器电压间接确定和调节脉动 PDV。小信号模型是通过分别表示交流侧和直流侧来开发的。交流侧控制设计有更高的带宽，以避免来自直流侧的干扰。直流侧控制利用直通占空比到 PDV 传递函数，控制器旨在最大限度地减少其右半平面零 (RHPZ) 特性的影响。门控信号通过最大恒定升压控制结合六分之一三次谐波注入实现。