特高压油浸式铁心并联电抗器内部温度场数值计算与实验研究

Numerical and Experimental Research of Internal Temperature Field of Oil-immersed Core Shunt Reactor with Ultra-high Voltage

超特高压并联电抗器内部电磁损耗和温度热点分布的研究对电抗器结构设计具有重要意义。由于电抗器铁心饼之间存在空气间隙的不连续结构,导致主磁通减少、漏磁通增加。大量漏磁通经过钢性结构件产生的铁损和绕组运行过程中产生的铜损造成电抗器局部过热现象。文中建立了电抗器本体及散热装置的三维模型,对电抗器内部结构件的磁场分布和电磁损耗进行研究计算。同时将损耗值作为热源,采用流固耦合方法分析了电抗器内部温度场、流体场分布,对局部热点进行定位。将实验测试结果与理论值、仿真计算值进行了对比,证明了该方法的正确性与有效性。

The value of loss and the temperature distribution of UHV shunt reactor are important for structural de- sign of shunt reactor. Because the discontinuous structure of core limp leads that the main magnetic flux reduces and the leakage flux increases as well as the loss increases, which causes local overheat problem of shunt reactor. The paper builds the simple shunt reactor 3D model and analyzes the magnetic field to get the value of the total loss. At the same time this paper builds the 3D model of the reactor cooling device and couples the loss as thermal load to analyze the inner temperature and fluid field and hotspot. In this article, the verification results are basi- cally identical with the calculated value, which verifies the correctness and effectiveness of the proposed method.