【摘要】 文章以一款发生烧毁的YB-35/0.69-3500 kVA风电升压箱式变电站（箱变）为研究对象，为解决其散热不良问题，根据热平衡计算了箱变的排风扇数量和进风面积，并基于有限体积法，对箱变的流动和温度场进行了仿真。仿真结果表明：通过变压器室采用双侧各3个风扇，增加4个变压器室进风格栅门，底板仅留B相绕组下方开孔，变压器两侧贯流风机各向变压器方向平移5 cm等改进措施，优化了箱变风路，显著降低箱变的热点温度。根据仿真分析结果，对原烧毁箱变改造后，现场进行满载运行试验，监测温度下降了10%，改造效果显著。该研究为箱变散热优化改造提供了经验借鉴。更多还原

【Abstract】 This study focused on a burned YB-35/0.69-3500 kVA wind power booster box-type substation as research object.To address its poor heat dissipation issue,the number of exhaust fans and air intake area of the box transformer was calculated based on thermal balance. Using the finite volume method,the flow and temperature fields of the box-type substation were simulated. The simulation results indicated that by adopting three fans on both sides of the transformer room,adding four air intake grilles to the transformer room,leaving only the opening below the B-phase winding on the bottom plate,and translating the cross-flow fans on both sides of the transformer 5 cm towards the transformer direction,these measures optimized the airflow path of the box-type substation and significantly reduced the hot spot temperature. According to the simulation recommendations,the full-load operation test was conducted on site after the retrofitting of the originally burned box-type substation. The monitored temperature decreased by 10%,demonstrating notable improvement. This study provides a practical approach for heat dissipation optimization and retrofitting of box-type substations.更多还原