基于DSP的1kW单相光伏并网锁相技术的研究

Research on 1 kW Single-Phase Photovoltaic Grid-Connected Phase-Locked Technology Based on DSP

针对光伏分布式电源并网系统锁相技术的问题,采用了一种基于DSP的光伏并网系统的数字锁相算法和程序流程设计,根据周期和相位的关系,通过调整周期来实现周期和相位的控制和锁定,方便地实现了对电网电压和光伏发电输出电流信号捕获和锁相的目的。最后制作样机并通过实验证明,该锁相方法设计准确,锁相精度高,保证了光伏并网系统的可靠性和实用性。

As to the problem,PV（Photo-Voltage）grid-connected distributed power supply system＇s phase locking, this paper proposes a photovohaic grid-connected system＇s digital phase-locked algorithm and program flow design based on DSP. According to the relationship between the period and phase of the cycle of adjustment, the control cycle and phase locking are realized. By this method, conveniently the grid voltage and PV power generation output current signal and the objectives of signal capture and phase-locked are realized. Finally, implement of the prototype and the experimental results proved that the method is accurate. The design ensures PLL method accuracy, reliability and practicability of the PV grid-connected system.