“供配电技术”三相负荷平衡的实践教学

Practical Teaching about Three-phases Load Balance in the Course Electricity Supply and Distribution

在学习"供配电技术"单相用电设备在配电系统中的等效负荷计算时,学生极易产生两个误区。本文首先说明了产生误区的原因,并基于发热等效原理给出了单相负荷等效为三相负荷的相关证明,然后结合音控喷泉主题竞赛中的实际负荷数据,进行了三相负荷平衡计算。采取以上措施进行教学后,激发了学生的学习兴趣,培养了工程设计能力,并取得了良好的教学效果。

When students learn how to calculate single-phase electrical installations equivalent load of distribution system in the course Electricity Supply and Distribution, two misunderstandings usually exist. The reasons of misunderstandings have been explained and correct equivalent understandings between single phase and three phase based on heat equivalent principles have been proved in this paper. According to the actual load data of music control fountain thematic competition, three-phases load balance have been calculated. After adopting foregoing measure in the teaching, learning interes,s, project design ability have been improved, and better effect has been obtained.