摘要
微网系统要求逆变器能够在并网和孤岛模式下运行,其需要分别获得电网相位和建立系统内部相位。两种模式能否无缝切换取决于系统相位能否无缝过渡。目前,常用锁相技术只能单独用于某种工作模式,在模式切换时将失效。本文基于谐振思想给出一种新型微网用锁相技术,其能够平滑过渡相位信息,减小过渡时电流畸变程度。最终,基于F28335搭建一台50kW微网实验平台,实验结果验证了该锁相环的可行性和理论分析的正确性。
Inverters used in microgrid system need to be run in grid-connected and islanding modes, which need to extract the phase of the grid and establish the internal phase of the system respectively. At present, conventional PLL can only be used in a certain mode and is invalid during mode switching. Therefore, a new type of PLL used in microgrid system is present in this paper base on resonant theory. With this method, the phase can be transited smoothly and current distortion can be reduced during mode switching. Finally, a 50kW microgrid experimental platform is designed base on F28335. Experimental results demonstrate the feasibility of the model and the correctness of the theoretical analysis.
出处
《电测与仪表》
北大核心
2013年第12期87-90,共4页
Electrical Measurement & Instrumentation
关键词
微网
谐振
锁相环
并网和孤岛模式
microgrid
resonant
phase-locked loop
grid-connected and islanding mode
