小型多模块高温气冷堆与局部外电网动态协同工作机理研究

Because of its inherent safety, high temperature gas-cooled reactor(HTGR) has been seen as one of the best candiates for Generation IV nuclear energy system. However, the inherent safety of a HTGR also leads to low power density and small thermal power. In order to enlarge the total plant, it is necessary to adopt the scheme of multiple nuclear steam supply systems (NSSSs) driving one steam turbine/generator set, i.e. to develop the multi-modular high temperature gas-cooled nuclear energy system(MMHTGR). Since the coordinated operation mode of this system with the power grid is much complicated than the mostly common single modular nuclear energy system. The power grid this system operate in could be a partial or independent power grid. Therefore the dynamic coordinated operation theory between this system and power grid requires thorough investigation. The research results could present useful guidance to engineering practice.

因具有固有安全性，高温气冷堆被视为第四代核能系统的首选堆型之一。然而固有安全性也导致高温气冷堆功率密度低且热功率小，为提升电站总功率，需用多套核蒸汽供应系统驱动一套汽轮发电机组。即发展多模块高温气冷堆核能系统。由于该型核能系统在协同工作方面远比目前广泛使用的单模块核能系统要复杂，同时其面对的外电网环境也更加复杂，因此要对其与局部外电网动态协同工作机理进行深入研究。通过研究结果，给出多模块高温气冷堆核电厂的最佳工作方式与参数，为工程实践提供指导与经验借鉴。

本项目对多模块高温气冷堆核电厂与外电网协调工作机理进行研究。研究面向反应堆系统、二回路系统、汽轮发电机组以及外电网之间的相互影响、相互制约的关系。通过对各子系统单独建模，并最终通过接口定义形成平台，对外电网以及反应堆在各种工况下的变负荷、负载跟踪以及外网各种扰动对反应堆的稳态运行影响进行分析。本项目的研究成果，对于后续多模块高温气冷堆的设计与研究提供的保障。