汽轮发电机组高位布置是燃煤发电机组的新型布置方案，与现有燃煤机组的空间结构存在较大的差异。为保障和提升高位布置辅机冷却水系统性能，按照功能与布置结构将辅机冷却水系统分为4个耦合的子系统，采用APROS软件建立了辅机冷却水系统模型，对高位布置辅机冷却水系统进行了优化设计，并将原系统与改进系统进行了定量对比和动态特性分析。结果表明：改进系统可降低辅机工作温度，节点温度峰值保持在65 ℃以下，冷却可靠性大幅提升。

The elevated configuration of a steam turbine generator set represents an innovative paradigm for coal-fired power generation, markedly deviating from the spatial structure inherent in conventional coal-fired units. In order to ensure and elevate the performance of the cooling water system for high-level arrangement auxiliary machinery, the auxiliary machinery cooling water system was classified into four interrelated subsystems based on functional and layout considerations. Requiring the utilization of APROS software, a meticulous model of the auxiliary machinery cooling water system was established. Subsequent to an optimization of the high-level arrangement auxiliary machinery cooling water system, a rigorous quantitative comparison and dynamic characteristic analysis were conducted between the original and enhanced systems. Outcomes delineate that the improved system effectuates a reduction in auxiliary machinery operating temperatures, with peak node temperatures consistently maintained below 65 ℃, thereby substantially amplifying cooling reliability.