基于异步变频调制算法的 UPS 数字输出锁相技术

摘要

为了提高 UPS 系统中逆变与市电锁相输出的效率和稳定性，减少 UPS 逆变／市电输出切换对系统和负载用电设备的冲击、加快切换速度。提出了针对变频器应用的异步调制数字变频算法，设计了基于 DSP 的数字化逆变锁相控制算法。实现了基于异步变频调制算法的 UPS 数字逆变锁相技术。设计了逆变／市电锁相控制验证程序，实验结果表明设计的 UPS 数字逆变锁相技术可以实现高效、可靠、高精度的锁相，逆变脉宽波形输出稳定。%In order to improve the efficiency and stability of inverter power and AC phase locked output in UPS system and reduce the impact of inverter /AC output switching on UPS system and load ,and speed up the switching speed .An asyn‐chronous modulation digital frequency conversion algorithm for frequency converter is proposed and a digital inverter phase locked control algorithm based on DSP is designed .A new digital inverter phase locked technology for UPS based on asyn‐chronous frequency conversion modulation algorithm is realized .The experiment result shows that the design of the UPS dig‐ital inverter phase locked technology can achieve high efficiency ,reliability ,high precision of phase locked ,and the inverter pulse width output is stable .