摘要
在电网电压频率波动谐波含量较大的情况下,硬件锁相很难准确检测到基波的相位,软件锁相技术具有数字控制的一切优点,研究了一种基于dq变换的三相软件锁相环。实验结果表明,该方案解决了电网电压频率波动时的相位同步等问题,锁相精度高,稳定可靠,并在工程上具有一定参考价值。
It is difficult to accurately detect the phase of positive sequence fundamental component of voltage while the power network frequency was varied. Software phase locked technology has all the advantages that the digital control has. A three-phase software phase-locked loop （SPLL） in the dq reference frame was described in this paper which was applied to detect the grid voltage. The experimental result indicates that this scheme is the solution for power network frequency variations and so on. The PLL method has high accuracy and reliability with certain reference value in the project.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第6期1034-1035,1045,共3页
Chinese Journal of Power Sources
关键词
数字控制
并网
数字锁相
digital control
grid-connected
digital PLL
