微型断路器中电热式电流检测参数辨识研究  

Research on the parameters identification of the electrothermal current detection method in the micro circuit breaker

作　　者：和嘉宇 宗鸣[1] He Jiayu;Zong Ming(College of Electrical Engineering,Shenyang University of Technology,Shenyang 110870)

机构地区：[1]沈阳工业大学电气电气工程学院,沈阳110870

出　　处：《电气技术》2020年第6期50-55,共6页Electrical Engineering

基　　金：国家自然科学基金资助项目(51777129)。

摘　　要：随着智能化电器的发展,塑壳断路器和万能式断路器都有了不同程度的智能化,惟有微型断路器因体积及技术原因一直难以实现智能化控制。本文使用了电热式电流检测的方法,首先利用Solidworks软件建立黑盒模型,代替双金属片检测电流,实现实时电流的智能检测。接着分析了正常工作时电流测量腔的发热功率组成部分,确定了黑盒模型中发热功率的影响因素,根据热平衡原理求解其传递函数并确定了需要辨识的参数,利用Matlab/Simulink软件进行仿真,得到发热功率和温升的数据,选用参数辨识众多方法中的递推最小二乘法确定了参数的大小,确定下来黑盒模型的参数后,即可根据温升数据预测当前电流值,从而实现电流的实时监测。With the development of intelligent electrical appliances,MCCB and ACB have different degrees of intelligence,only MCB limited by volume,cost and other factors have been difficult to achieve intelligent control.This paper uses the method of electrothermal current detection,according to Solidworks software to establish a black-box model which located in the traditional MCB in the bimetallic sheet,instead of bimetallic chip detection current,to achieve real-time current intelligent detection.Firstly,the thermal power component struck by the normal operation of the MCB and the parameters that need to be identified were determined by the principle of thermal balance and its transfer function,and the data of heating power and temperature rise was obtained by using Matlab/Simulink software to simulate,and the size of the parameters was determined by the recursive least square,After determining the parameters of the black-box model,the current value can be predicted based on the temperature rise data,so as to realize the real-time monitoring of the current.

关 键 词：智能断路器 电热式电流测量法 递推最小二乘法 参数辨识 

分 类 号：TM561[电气工程—电器] TM933.1