基于电力线通信的逆变器并联系统同步控制方法

提出了一种基于电力线载波通信(power line commun- ication，PLC)技术的逆变器并联系统输出同步控制方法，应用于实现硬件无互连线方式的逆变电源并联系统。各并联模块之间通过PLC方式交换各自电压基准正弦信号的频率和相位信息，调节并保持输出电压同频、同相，在此基础上再实现逆变器模块输出均流。研究了同步控制原理，提出了同步调节控制算法，设计了基于数字信号处理器(digital signal processor，DSP)的软硬件实现。理论分析和实验结果证实了控制策略的有效性和可行性。

Synchronization Control for Inverters in Parallel Operation Based on Power Line Communication

A novel output synchronization control based on power line communication (PLC) for inverters in wireless parallel operation is proposed. The frequency and phase of the sinusoidal voltage reference are exchanged and regulated to keep the output of the modules almost in phase to improve output current sharing greatly among the inverter modules connected in parallel. System architecture is proposed and control principle is depicted and the control is implemented with the PLC and the digital signal processor (DSP) control circuit. The PLC modem chip is controlled by DSP to realize the data sending and receiving operation through the power line. According to the received information from other inverter modules, the phase of the square-wave synchronization signal in each module is regulated. Theoretical analysis and experimental results are provided to verify the validity and feasibility of the proposed control.