基于输入电流的牵引变流器开关管开路故障诊断方法

doi:10.11985/2016.05.002

摘要/Abstract

摘要：

本文提出一种针对交直传动牵引变流器的故障诊断和定位的新方案。该方案将正常和故障条件下系统输入电流进行比较,通过其中的差异获得故障状态,并根据故障诊断表对故障管进行定位。诊断变量为电流差误差的极性,省去了繁复精确的计算过程并有效地避免了负载变化对电流的影响。故障检测装置简单,可直接加在现有的变流系统中而不增加系统复杂性。另通过一些简单的电路将诊断信号数字化,从而显著提高了牵引变流器的检修便捷性。该方法诊断时间短,从故障发生到诊断结果输出只需要两个基本周期。利用Matlab/Simulink软件平台建立仿真模型,通过实验验证了该故障诊断方法的有效性。

关键词: 变流器, 故障诊断, 故障定位

Abstract:

In this paper, a novel method for fault diagnosis and location of traction converter for AC/DC drive is presented. This scheme compares the input current of the system under normal and fault condition. The fault state is obtained by the distinction and the fault location is identified by the fault diagnosis table. The diagnosis variable is the polarity of current error, eliminating the complicated calculations and avoiding the influence of load variation on the current. The fault detection device is simple, which can be directly included in the existing converter system without any increase of system complexity. The digital signal of fault diagnosis is achieved by using simple hardware, which significantly improves the ease of maintenance on the traction converter . The proposed method has a short diagnosis time, and it took only two fundamental periods to determine the diagnostic results. The simulation model is established in Matlab/Simulink software platform, and the effectiveness of the fault diagnosis method is verified by experiments.

Key words: Converter, fault diagnosis, fault location

中图分类号:

TM46

陈怡恬,陈特放,成庶,陈高华,王晗. 基于输入电流的牵引变流器开关管开路故障诊断方法[J]. 电气工程学报, 2016, 11(5): 11-20.

Chen Yitian,Chen Tefang,Cheng Shu,Chen Gaohua,Wang Han. Input Current-Based Diagnosis Scheme for Power Transistor Open-Circuit Faultin Traction Converter[J]. Journal of Electrical Engineering, 2016, 11(5): 11-20.

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参考文献 11

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故障管周期	T₁
正常	a₂→VD₃→VT₄→x₁→a₁→VD₁→VT₆→x₂
VT₁	~
VT₂	~
VT₃	~
VT₄	a₂→VD₃→VT₂→b₁→a₁→VD₁→VT₆→x₂
VT₅	~
VT₆	VD₃→VT₄→x₁→a₁→VD₁→VD₄
VD₃	VT₅→VT₄→x₁→a₁→VD₁→VT₆
VD₄	~
VD₁	a₂→VD₃→VT₄→VT₃→VT₆→x₂
VD₂	~
故障管周期	T₂
正常	x₂→VT₅→VD₂→a₁→b₁→VT₁→VD₄→a₂
VT₁	x₂→VT₅→VD₂→VD₁→VD₄→a₂
VT₂	~
VT₃	~
VT₄	~
VT₅	VD₃→VD₂→a₁→b₁→VT₁→VD₄
VT₆	~
VD₃	~
VD₄	VT₅→VD₂→a₁→b₁→VT₁→VT₆
VD₁	x₂→VT₅→VD₂→a₁→x₁→VT₃→VD₄→a₂
VD₂	x₂→VT₅→VT₄→VT₁→VD₄→a₂
故障管周期	T₃
正常	x₂→VT₅→VD₂→a₁→x₁→VT₃→VD₄→a₂
VT₁	~
VT₂	~
VT₃	x₂→VT₅→VD₂→a₁→b₁→VT₁→VD₄→a₂
VT₄	~
VT₅	VD₃→VD₂→a₁→x₁→VT₃→VD₄
VT₆	~
VD₃	~
VD₄	VT₅→VD₂→a₁→x₁→VT₃→VT₆
VD₁	~
VD₂	x₂→VT₅→VT₄→VT₃→VD₄→a₂
故障管周期	T₄
正常	a₂→VD₃→VT₂→b₁→a₁→VD₁→VT₆→x₂
VT₁	~
VT₂	a₂→VD₃→VD₂→VD₁→VT₆→x₂
VT₃	~
	（续）
故障管周期	T₄
VT₄	~
VT₅	~
VT₆	VD₃→VT₂→b₁→a₁→VD₁→VD₄
VD₃	VT₅→VT₂→b₁→a₁→VD₁→VT₆
VD₄	~
VD₁	a₂→VD₃→VT₂→VT₃→VT₆→x₂
VD₂	a₂→VD₃→VT₄→x₁→a₁→VD₁→VT₆→x₂

故障管周期	i₁				i₂
电流	T₁	T₂	T₃	T₄	T₁	T₂	T₃	T₄
正常	+	-	-	+	+	-	-	+
VT₄	+	-	-	+	+	-	-	+
VT₃	+	-	-	+	+	-	-	+
VT₁	+	-	-	+	+	0	-	+
VT₂	+	-	-	+	+	-	-	0
VD₂	+	-	-	+	+	+	0	+
VD₁	+	-	-	+	0	-	-	-
VT₆	0	-	-	0	+	-	-	+
VT₅	+	0	0	+	+	-	-	+
VD₄	+	0	0	+	+	-	-	+
VD₃	0		-	0	+	-	-	+

故障管周期	i₃				i₄
电流	T₁	T₂	T₃	T₄	T₁	T₂	T₃	T₄
正常	+	0	-	0	+	0	0	+
VT₄	0	0	-	0	+	0	0	+
VT₃	+	0	0	0	+	0	0	+
VT₁	+	0	-	0	+	0	0	+
VT₂	+	0	-	0	+	0	0	+
VD₂	+	+	0	0	+	0	0	+
VD₁	0	0	-	+	+	0	0	+
VT₆	+	0	-	0	+	0	0	+
VT₅	+	0	-	0	+	+	+	+
VD₄	+	0	-	0	+	0	0	+
VD₃	+	0	-	0	0	0	0	0

VT₁?VT₆	BTA16-600B
VD₁?VD₄	RHRP3060
75R/76R	RxQ-100-750ΩJ
11L/12L	0.028H
变压器	220V/190V X2,其一带中间抽头
电机	Z2-42（340V/4kW）

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