基于热积累模型的低压电动机保护装置的研究与设计

Research and Design of Low Voltage Motor Protection Device Based on Thermal Accumulation Model

针对电力系统中的低压电动机热过载现象,以低压电动机继电保护为研究对象,建立了电动机热过载现象中的热积累与反时限特性的数学模型。通过建立数学模型,研究设计了一种低压电动机热过载继电保护装置,分别介绍了热过载过程数学模型、保护值整定方法、继电保护装置硬件设计、保护算法。

In this paper,the thermal overload phenomenon of low voltage motor in power system is studied,and the mathematical model of heat accumulation and anti time limit characteristics of motor is established.By establishing the mathematical model,a low voltage motor thermal overload relay protection device is designed.Thermal overload process mathematical model,protection value tuning method,hardware design of relay protection device,protection algorithms are introduced respectively.