无互联线逆变器并联系统中数字锁相环的设计  

Design of DPLL of the Parallel Inverters without Control Interconnection Basing on Droop Characteristic

作　　者：阚加荣[1] 谢少军[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《电力电子技术》2007年第4期37-39,共3页Power Electronics

摘　　要：逆变器并联的前提条件之一是必须保证各单台逆变器之间频率、相位和幅值的基本相同。逆变器并联时的初始同相位和同频率是通过锁相环来保证的。在此分析了传统数字锁相环用于无互联线逆变器并联的不利影响;基于全数字逆变器,提出了一种新的软件锁相环控制方案。采用DSP的捕获功能和改变计时器的周期值可快速、平稳地实现单台逆变器对并联交流母线相位和频率的跟踪。The precondition of the inverter parallel system basing on droop scheme is that there are no difference in frequency and phase between output voltage,which is realized by phase-locked loop.This paper shows a method to achieve this function by DSP after detailed analysis disadvantage of the traditional digital phase-locked loop.Using the capture function of DSP and altering the period of timer,the phase-following can be realized fleetly and calmly.

关 键 词：逆变器 数字控制 锁相环控制 

分 类 号：TM464[电气工程—电器] TN86[电子电信—信息与通信工程]