摘要
本文介绍了变频器和工频电源之间的锁相环同步切换控制首先建立了锁相环路的二阶线生相位模型,分析了一般PI滤波器环路的跟踪算法,然后根据系统对捕获过程性能的要求,提出了Bang-Bang控制器和变结构控制器。对此做了仿真比较,发现基于趋近率的变结构控制在捕获时间和稳态精度的综合性能止优于Bang-Bang控制和PI控制。
We focus on the synchronous switch control between the Variable Frequency Drive and the power line by the method of phase locking.First,we set the second order linear model of the phase locked loop and analyze the general tracking algorithm based on PI filter.Then,to attain better performance of the lock-in speed, we introduce Bang- Bang control and variable structure control.By the simulation experiment,we find that the lock-in time and steady state accuracy performance of variable structure control are superior to that of Bang-Bang control and PI contrl.
出处
《变频器世界》
2010年第1期53-57,共5页
The World of Inverters
关键词
同步切换
最优控制
锁相环
Synchronous switch control Optimal control Phase-locked loop
