From the viewpoints of hardware and software, this article analyses the implemetion method and it s advantages and defi ciences of the dual computer control mode of plant control computer on CANDU6 unit, and bring forward the problems should be adverted to in daily operation and mentanance work and counter - measurements.

Analysis of dual control ventilation modes;

To solve the problem of PWM mode of switching power supply which efficiency is low in light load,and the problem of PFM mode which output noise bandwidth is wide,wave filtering is difficult,a novel switch power supply modulation mode is presented-skip cycle modulation(SCM) combining double-loop control mode with variable current limit comparator.