为解决目前核电机组频繁调峰所存在的运行安全性问题，基于EBSILON仿真软件在AP1000核电站二回路热力系统模型基础上，将燃气轮机循环与核电站二回路的蒸汽朗肯循环相结合，提出3种核气联合循环系统配置方案。对建立的核气联合循环系统进行分析，结果表明：3种方案中联合循环效率最高的是方案3，该方案配置6台燃气轮机并且用省煤器代替2台高压加热器和2台低压加热器，其联合循环效率为48.760%；通过遗传算法，对方案3的主要参数进行优化，优化后联合循环效率增加至49.893%；采用核气联合循环后提高了核电机组的安全性。

In order to solve the unit operation safety problems existing in the current nuclear power peak regulation, this paper combines the gas turbine cycle with the steam Rankine cycle in the secondary loop of the nuclear power plant based on the EBSILON simulation software on the basis of the AP1000 nuclear power plant secondary loop thermal system model, and proposes three types of nuclear gas combined cycle system configuration schemes, so as to analyze the established nuclear gas combined cycle system.The results show that among three schemes, the most efficient combined cycle scheme is scheme Ⅲ. This scheme is equipped with six gas turbines and replaces two highpressure heaters and two lowpressure heaters with economizers, which combined cycle efficiency is 48.760%.The main parameters of scheme Ⅲ are optimized through genetic algorithm. After optimization, the combined cycle efficiency increases to 49.893%.The nuclear gas combined cycle system could improve the safety for the nuclear power unit.

TM623

国家自然科学基金(52076126)