Analysis and Application of Load Change Rate Algorithm For CPR1000 Nuclear Power Plant
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摘要: 在CPR1000核电厂的工艺控制中,要求机组负荷变化率超过200 MW/min时,疏水阀打开的响应时间应在2～10 s以内,且需要抵抗1～2 s的扰动。在数字化仪控系统(DCS)中通常使用微分算法或周期迭代法根据实时及历史负荷值计算机组负荷变化率,但无法实现以上工艺要求。对这2种常用算法进行了仿真和分析,在此基础上提出一种优化的滑动平均值周期迭代法。该算法结合了滑动平均算法的抗扰特性以及周期迭代法计算变化率的功能,可满足该特定工艺的控制要求,已在CPR1000核电厂的DCS控制中获得应用。Abstract: According to the requirement of the controlling processing for CPR1000 nuclear power plant, the drain valve should be opened in 2~10 s, and could resist 1~2s interference. Generally, the differential algorithm or iteration algorithm can be used for the change rate calculation in DCS system, but they cannot meet the above requirement. Based on the simulation and analysis of these two algorithm, an optimized sliding average iteration algorithm for the calculation of unit load is presented. This algorithm combines the disturbance-rejection characteristics of sliding average algorithm and the change rate calculation function of cycle iteration algorithm, and meets the certain requirement. This algorithm has been applied in the DCS process control of CPR1000 several nuclear power plant.
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