Analysis of the eddy current loss and economy study in underground cable duct
ZHANG Bo1, MA Jian2, YING Jian2, YANG Shi you1
(1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;
2.Jinhua Electric Power Design Institute Co., Ltd., Jinhua 321000, China)

Abstract: In order to solve the issue of the electrical energy loss which is generated by the eddy current in traditional underground steel reinforced duct model, a finite element model and method was proposed to analyze the eddy current field and temperature field in the complex environment underground model and a scheme of using the glass fiber reinforced polymer (GFRP) instead of the steel in the underground duct was proposed. Moreover, the three dimension eddy current temperature coupled field was computed by adopting a fast convergence, high accuracy mesh technique and an iteration solver for coupled multi physics field; The eddy current distribution of the metal component, temperature field distribution of the whole model were obtained; also the temperature of the cable cores under a harmonic current condition was analyzed. The technical and economic performances of the traditional and proposed model were compared. The results indicate that the scheme of using GFRP instead of steel can reduce the loss, and possess better economic performance at the same time.

Key words: eddy current loss, duct; finite element method; temperature field; glass fiber reinforced polymer(GFRP); electromagnetic field