核岛380V感应电动机起动电流与电源保护匹配关系的研究

Research on Relationship between Power Supply Protection and Starting Current for Nuclear Island 380V Electric Induction Motors

核电厂核岛380V感应电动机采用全压直接起动方式,起动电流大,易影响对电机起动性能做出正确评价,甚至引发上游电源保护误动开关跳闸。本文对三种起动电流测试方法进行了比较,并分析其结果差异及标准要求。同时,本文也比较了两种主要电源保护配置方案,研究探讨适合于核岛380V感应电动机起动的保护措施。

The starting currentof direct-on-line startingwayused for 380V electric induction motors in nuclear islandisso large that it easily impacts the evaluation of the motors＇starting performance and even leads the upstream power supply protection misoperation and switches trip. This paper compares three kinds of starting current test methods, analysesthe differences between the test results and the standard requirements. Meanwhile, two types of main power protection configuration schemes are compared in this paper to researchsuitable protection measures for 380V electric induction motors in nuclear island.