为保证1 000 MW超临界机组在运行中出现辅机跳闸等事故时，能安全平稳地降至安全负荷，在调试期间进行辅机故障减负荷（RUN BACK，RB）试验显得尤为重要。基于某电厂2台1 000 MW超临界机组，针对机组特点并结合以往经验，对RB控制策略进行了研究与优化，包括协调控制、燃料控制、风量控制和给水控制。最终的RB试验结果表明，各设备动作正确，参数控制在合理范围内，RB控制策略功能完善，自动控制效果良好。

In order to ensure safely and smoothly coming down to safe load for 1 000 MW supercritical units when auxiliary equipment tripping occurs, it is important to carry out RUN BACK (RB) tests during debugging process. Taking 2×1 000 MW supercritical units in a power plant as examples, the RB control strategy is studied and optimized in this paper, such as coordination control, fuel control, air volume control and feed water control, according to the units characteristics and previous experience. The RB testing results show that the equipments act correctly, the parameters are controlled within a reasonable range, the function of RB control strategy is perfect, as well as the automatic control effect is good.