文档介绍：摘要
研究自适应保护的目标是解决传统保护中存在的问题,并进一步改善保护的性能。
论文就高压开关柜使用的电力线路及电动机自适应保护装置研究课题展开论述。
本文首先在综述自适应继电保护的特点及发展方向的基础上,分析了配电系统中
线路和电动机综合保护研究开发的现状和不足之处,然后提出了线路保护和电动机保
护中所采用的自适应保护方案。
对线路保护,本文采用线路相电流差作为自适应保护判据的故障特征量,文中对
相电流差特性进行了理论分析,并利用ATP-EMTP对其特性进行仿真验证。
对电动机保护,本文提出了对电动机运行状态实时检测的方案,从而使电动机电
流速断保护的整定值根据电动机运行状态自适应调整;本文进一步阐述了利用机端阻
抗变化率作为故障特征量,实现对电动机起动过程中的堵转保护的方案;本文还利用
MATLAB中的动态仿真工具SIMULINK建立了异步电动机起动过程的仿真模型,仿真结果
验证了判据的正确性。针对传统反时限保护特性曲线时延计算存在误差较大的问题,
本文提出了一种新的反时限保护特性曲线算法,提高了延时精度。
结合原理改进,本文还对高压开关柜用保护测控装置的研制开发工作进行了论述,
包括基于自适应原理的线路和电动机保护配置方案,具有通用性功能的高压开关柜用
测控保护硬件平台,以及线路和电动机测控保护装置的软件方案。

关键词:输电线路电动机仿真研究高压开关柜自适应保护
I
ABSTRACT
The target of the research of adaptive relay protection is to settle the disadvantage in
traditional relay protection and improve the performance of protection. the discussing of the
dissertation is on the background of the research&develepment of adaptive transmission line
and asynchronous motor protection device installed in high-voltage switch .
At first,This dissertation summarizes the characteristics of adaptive protection and its
development direction,and analyses the status quo and disadvantages of relay protection on
transmission line and asynchronous motor in distribute power systems the
dissertation give the project of adaptive protection in transmission line and asynchronous
motor respectively.
In transmission line protection,the phase differential current is regarded as the
characteristic value of the adaptive protection judgement character of phase
differential current is analysed in theory and simulated by ATP-EMTP software.
In asynchronous motor protection,a method is involved to judge the running state of
motor,so that the set value of overcurrent quick-break can adjusts adaptively, the variate-rate
of impedance at input port is regarded as the characteristic value to judge locked rotor during
the starting process,in this dissertation, SIMULINK,a dynamic simulation