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Master-Slave Control of Parallel-Operated Interfacing Inverters Based on Wireless Digital Communication

机译:基于无线数字通信的并联接口逆变器主机控制

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Parallel-operated inverters with common dc and ac bus can be used as interface of PV system connecting to public ac grid. This paper presents a parallel-operated gird-tied inverter system with master-slave current-sharing control based on wireless digital communication. Firstly, the proposed master-slave control scheme is introduced. Current reference of slave modules are all given by the master module through wireless digital communication. Thus the load can be evenly shared among the modules and dc link voltage can be regulated by the sole voltage controller in master module. Secondly, the influence of communication delay and zero-order-hold on the parallel-operated inverter system is analyzed. And a design criteria to reduce the influence of wireless digital communication is studied and determined. Performance of proposed control structure and design criteria are experimentally verified. With the proposed structure, the parallel inverter system is robust, the voltage regulation and load sharing are achieved, with improved modularity and operation flexibility.
机译:具有公共DC和AC总线的并联逆变器可用作连接到公共交流电网的PV系统的界面。本文介绍了一种具有基于无线数字通信的主从电流共享控制的平行操作的晶带逆变器系统。首先,介绍了所提出的主从控制方案。从模块的当前参考由主模块通过无线数字通信给出。因此,可以在模块中均匀地共享负载,并且可以通过主模块中的唯一电压控制器调节DC链路电压。其次,分析了通信延迟和零阶保持对并联操作的逆变器系统的影响。研究和确定了减少无线数字通信影响的设计标准。实验验证了所提出的控制结构和设计标准的性能。利用所提出的结构,并联逆变器系统具有稳健,实现了电压调节和负载共享,具有改进的模块化和操作灵活性。

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