摘要在电力系统中，若要把电能转化为机械能，一般通过电动机来实现。但电动 机在运行中难免会产生故障，这些故障会对电动机造成一定程度的损坏，所以研 究一款可靠的电动机保护装置有利于减少故障对电动机的破坏。随着时代在进 步，对电动机保护的要求也在日益提高。因此，在改进传统保护装置的同时研发 一款多功能化和智能化的保护装置迫在眉睫。随着计算机技术的发展，微机技术 和 DSP 技术已经进入了电动机保护领域。本论文围绕基于 DSP 的微机电动机保 护装置的研究这一中心任务展开，开发了三相异步电动机的保护装置。本文主要 内容如下

1。细致地分析了三相异步电动机可能产生的故障及其对应的故障电流，在此 前提下通过检测产生于定子上的故障电流分量给出异步电动机故障保护判断依 据。阐述综合保护的原理并提出设计构想和思路,最后给出微机保护算法。72273

2。本设计在硬件系统上，设计了保护装置硬件结构系统，并采用模块化的思 想使硬件系统保护功能分块实现。主要的保护模块有处理器模块、模拟量采集模 块、开关量输入输出模块、电源模块、人机接口模块等。

3。本设计在软件系统上，设计了软件系统的整体结构。主要包括采样中断模 块、保护中断模块、人机接口模块。给出了电气测量的算法，用于计算电压电流 值、有功功率值、无功功率值和功率因素。

该论文有图 15 幅，表 4 个，参考文献 18 篇。

毕业论文关键词 三相异步电机 DSP 综合保护

Three-phase asynchronous motor integrated protection system design

Abstract In power system, if we want to change the electrical energy is transformed into mechanical energy, usually implemented by the motor。 But the motor in operation will inevitably produce fault。 These faults will cause a certain degree of damage to the motor。 So the research of a reliable motor protection device to  reduce  fault less damage to the motor。 With age in progress, the motor protection requirements are increasing。 Therefore, improvement of conventional protection devices at the same time R & D a multifunctional and intelligent protection device for imminent。 With the development of computer technology, computer technology and DSP technology has entered the field of motor protection。 This paper around based on DS The central task of the research on the protection device of the microcomputer based on P is developed, and the protection device of the three-phase asynchronous motor is developed。

1。 Detailed analysis the three-phase asynchronous motor possible faults and corresponding fault current, under this premise by detecting generated in  the stator fault current component and gives the asynchronous motor fault protection judgment basis。 Introduces the principle of comprehensive protection and puts forward the design idea and train of thought。 Finally, the paper introduces the microcomputer protection algorithm。

2。 The design on the hardware system design protection device of hardware structure of the system, and adopts the idea of modular block implementation of the protection function of the hardware system。 The main protection module, a processor module, analog acquisition module, switch input and output module, power supply module, man machine interface module and so on。

3。 The design on the software system, the design of the overall structure of the

software system。 Mainly includes sampling interrupt module, protection, interrupt module, man-machine interface module。 Given the electrical measurement algorithm for calculation of voltage and current value, value of the active power, reactive power and power factor。