智能低压无功补偿控制器的设计

通过分析比较市场上的各种低压无功补偿控制器，利用AVR单片机来进行一款简单智能控制器的研制。提出一种新的极性识别方法，避免了复杂的泰勒级数运算，提高了运算效率，降低了程序量。同时利用AVR单片机的捕捉功能，进行自适应采样周期及时调整采样周期。实验结果证明，极性自动识别算法简单、结果准确，自适应周期采样计算频率速度快、精度高，可有效消除计算偏差。

Design of a Simple and Intelligent Low-voltage Var Compensation Controller

By comparing and analyzing different low-voltage var compensator,a simple and intelligent controller based on AVR is designed.A new method of polarity identification is presented,therefore the complex Taylor series is avoided,the efficient is improved and the procedure quantity is reduced. At the same time,the Capture function of AVR is used to do adaptive integral period sampling and adapt the sampling period. The experiment results shows that the polarity identification put forward in this paper is simple and reliable;the adaptive period sampling has a high speed and a high precision which can eliminate the calculation deviation efficiently.