论文标题
合成平均的虚拟振荡器动力学，以使用输出LCL滤波器控制逆变器
Synthesizing Averaged Virtual Oscillator Dynamics to Control Inverters with an Output LCL Filter
论文作者
论文摘要
在商业逆变器中，LCL过滤器被认为是过滤开关谐波并产生正弦输出电压的组成部分。有关平均虚拟振荡器控制器（VOC）动力学的现有文献是在包含开关谐波或归纳过滤器的输出LCL滤波器之前的当前反馈，而忽略了滤波电容的效果。在这项工作中，针对LCL过滤器后具有当前反馈的岛逆变器提出了一种新版本的VOC动力学，从而避免了转换谐波进入VOC。确定了平均VOC动力学内的嵌入式下垂特征，并提出了参数设计过程，以根据所需的AC绩效规范来调节输出电压幅度和频率。此外，提出了一种基于这种新版本的平均VOC动力学的功率调度技术，以同时调节两个并行连接的岛屿逆变器的主动输出功率和反应性输出功率。得出控制定律，并提出了功率安全约束，以确定可实现的功率设定点。负载瞬变和功率调度的仿真结果验证了建议的平均VOC动力学版本。
In commercial inverters, an LCL filter is considered an integral part to filter out the switching harmonics and generate a sinusoidal output voltage. The existing literature on the averaged virtual oscillator controller (VOC) dynamics is for current feedback before the output LCL filter that contains the switching harmonics or for inductive filters ignoring the effect of filter capacitance. In this work, a new version of averaged VOC dynamics is presented for islanded inverters with current feedback after the LCL filter thus avoiding the switching harmonics going into the VOC. The embedded droop-characteristics within the averaged VOC dynamics are identified and a parameter design procedure is presented to regulate the output voltage magnitude and frequency according to the desired ac-performance specifications. Further, a power dispatch technique based on this newer version of averaged VOC dynamics is presented to simultaneously regulate both the active and reactive output power of two parallel-connected islanded inverters. The control laws are derived and a power security constraint is presented to determine the achievable power set-point. Simulation results for load transients and power dispatch validate the proposed version of averaged VOC dynamics.
