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ACSS for paralleled multi-inverter systems with DSP-based robust controls

机译：带有基于DSP鲁棒控制的并行多逆变器系统的ACSS

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摘要

An averaged current-sharing strategy (ACSS) for paralleled multi-inverter systems with digital signal processor (DSP)-based robust controls is presented. With an ACSS, the inverters are in parallel operation and each inverter has a voltage robust controller to achieve system stability and robustness, and a current robust controller to track the averaged inductor current of the inverters to achieve equal current distribution. In the proposed system, the current-sharing control loop is independent of the voltage control loop. Therefore, equal current distribution among the inverters, fast response, and tight regulation can be achieved. Additionally, the ACSS in each inverter can be readily implemented with two operational amplifiers. Simulation results and hardware measurements or a single-inverter system and a two-inverter system, and simulation results of a three-inverter system with linear and nonlinear loads have demonstrated the feasibility of the proposed control scheme in equal current distribution and fast regulation.
机译：提出了具有基于数字信号处理器（DSP）的鲁棒控制的并行多逆变器系统的平均电流共享策略（ACSS）。借助ACSS，逆变器可以并联运行，每个逆变器都具有一个耐压控制器以实现系统的稳定性和鲁棒性，以及一个耐电流控制器以跟踪逆变器的平均电感器电流以实现均等的电流分配。在提出的系统中，均流控制环路独立于电压控制环路。因此，可以在逆变器之间实现均等的电流分配，快速响应和严格的调节。此外，每个逆变器中的ACSS均可通过两个运算放大器轻松实现。仿真结果和硬件测量结果（单逆变器系统和两逆变器系统）以及带有线性和非线性负载的三逆变器系统的仿真结果证明了所提出的控制方案在均流和快速调节中的可行性。

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