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针对未来我国大型核电装机比重在区域电网日益增长的趋势,介绍了我国与国外大容量压水堆核电机组参与电网调峰的现状,分析了它们参与中间负荷调峰的必要性;通过分析商用压水堆设计特性、核汽轮机工作特性指出了机组进行日中间负荷调峰的可行性,推荐了日负荷跟踪出力曲线;指出压水堆在局部功率峰、慢速调节硼酸浓度、氙钐等毒物的瞬态、堆芯寿期末的碘坑、燃料芯块与包壳的相互作用等方面,制约着机组调峰的安全性和灵活性,在此基础上深入探讨机组适应日负荷跟踪调峰运行需具备的技术条件;以大亚湾M310型机组为例,通过分析其负荷变动时稳态和瞬态下主系统和设备的工况变化,指出调峰运行对电站核安全、可靠性的负面影响有限,对经济性的降低较明显;以第三代先进压水堆为例,提出了机组适应调峰运行需努力的技术方向。
In view of the trend that the installed capacity of large-scale nuclear power in China is increasing in the regional power grid in the future, this paper introduces the current situation of large-capacity PWR nuclear power plants participating in the power grid peak regulation in our country and abroad, and analyzes the necessity of their involvement in the peak load regulation of the intermediate load. The design characteristics of water reactor and the working characteristics of nuclear steam turbine indicate the feasibility of peaking midday load on the unit. The daily output curve of recommended load is recommended. It is pointed out that the pressure water reactor has local power peak, slow adjustment of boric acid concentration, xenon samarium and other poisons Transient, the end of the core of the iodine pit life, the fuel pellets and the cladding interaction, etc., restricts the safety and flexibility of the unit peak shaving, on the basis of an in-depth study of the unit to adapt to the load tracking peak load operation needs With Daya Bay M310-type unit as an example, by analyzing the steady-state and transient conditions of the main system and equipment under load changes, it is pointed out that the negative impact of peak-shifting operation on the nuclear safety and reliability of the power plant is limited, The economic reduction is obvious. Taking the third-generation advanced pressurized water reactor as an example, the technical direction for the unit to adapt to peak-shifting operation is proposed.