摘要
挖掘在运变压器的负载能力是急救负荷工况下保障电网安全运行的重要举措。在变压器本体油顶层温度、绕组热点温度经典计算方法的基础上,提出了特殊变压器的R×K^(2)、gr优化计算方法,进一步释放了变压器的原始负载能力。针对不同冷却方式的变压器,提出加装风扇、更换低速风扇和风扇电源变频改造的变压器冷却能力提升方法,进而提升了在运变压器负载能力;分析了变压器高负载运行期间的安全风险,提出基于油位监视和集气盒可燃气体在线监测的安全管控手段,为保障变压器高负载运行安全提供了技术保障。
Exploiting the load capacity of operating transformers is an important measure to ensure the safe operation of the power grid under emergency load conditions.Based on the typical methods for top oil temperature measure⁃ment and hot-spot temperature measurement,this paper proposes an optimal measurement of R×K^(2) and gr for spe⁃cial transformers to exert the original load capacity of the transformer still further.Meanwhile,to improve the cooling capacity of transformers,a series of solutions including installing extra fans,replacing low-speed fans,and fre⁃quency conversion of power supply for fans.Thus,the load capacity of the operating transformers is improved.The paper analyzes the transformers’safety risks during the high-load operating condition,and proposes a new safety management method based on the online monitoring of oil levels and combustible gas,providing technical support for ensuring the high-load operation safety of transformers.
作者
何文林
邵先军
HE Wenlin;SHAO Xianjun(State Grid Zhejiang Electric Power Co.,Ltd.Research Institute,Hangzhou 310014,China)
出处
《浙江电力》
2022年第11期68-72,共5页
Zhejiang Electric Power
关键词
变压器
负载能力
评估
变频
风扇
可燃气体
油位
transformer
load capacity
evaluation
frequency conversion
fan
combustible gas
oil level
