基于开关组误差电压的双级矩阵变换器故障诊断策略

摘要/Abstract

摘要：

矩阵变换器（MC）由数量较多的功率开关构成,这些功率开关元件用在各种复杂的环境以及高频切换的电路系统,增加了功率开关发生故障的可能性,也降低了MC系统的可靠性。功率开关故障成为了阻碍MC系列拓扑进入工程化应用的主要因素之一,而对MC功率开关进行在线故障诊断并进行合适的容错控制可以有效地提高MC系统可靠性。本文针对双级矩阵变换器（TSMC）的功率开关开路故障诊断策略进行研究,对功率开关故障下的TSMC运行模式及其输出电压、直流电压故障特征进行了深入分析,定义了开关组误差电压的概念,提出了根据输出相电压误差、开关信号以及直流电压定位TSMC故障开关的方法。所提方法具有诊断准确、诊断速度快、独立于调制策略、不受负载运行状态影响等优点。仿真实验结果验证了理论分析的正确性以及所提故障诊断策略的有效性。

关键词: 双级矩阵变换器, 输出相电压误差, 开关组误差电压, 直流电压, 故障诊断

Abstract:

MC is constituted by a large number of power switch, These power switch elements used in a variety of complex environment and high frequency switching circuit system, and increased the possibility of power switch failure, but also reduced the reliability of MC system. Power switch failure has become one of the main factors hindering MC topology into engineering application, on-line fault diagnosis and appropriate fault-tolerant control can effectively improve the reliability of MC system. This paper research in fault diagnosis strategy when TSMC’s power switch in open-circuit fault, then deeply analyzed TSMC’s operation mode and fault characteristics of output voltage, DC voltage, defined the concept of switch group error voltage(SGEV), provides the methods to locate the fault switch according to output voltage error, switch signal and DC voltage. The proposed methods has many advantages, such as accurate diagnosis, fast detection, independent of the modulation strategy and unaffected by the load condition, etc. The simulation results has verified the validity of the theoretical analysis and the effectiveness of the fault diagnosis strategy.

Key words: Two-stage matrix converter, the output voltage error, switch group error voltage, DC voltage, fault diagnosis

中图分类号:

PM46

邓文浪,黄斯瑶,郭有贵,刘和,余帅. 基于开关组误差电压的双级矩阵变换器故障诊断策略[J]. 电气工程学报, 2015, 10(5): 51-60.

Deng Wenlang,Huang Siyao,Guo Yougui,Liu He,Yu shuai. Fault Diagnosis Strategy in Two-Stage Matrix Converter Based on Switch Group Error Voltage[J]. Journal of Electrical Engineering, 2015, 10(5): 51-60.

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参考文献 18

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i_A	S_ApS_BpS_Cp	正常情况输出三相相电压			S_Ap开路故障输出三相相电压			输出相电压误差			S_An开路故障输出三相相电压误差
i_A	S_ApS_BpS_Cp	u_A	u_B	u_C	u_Am	u_Bm	u_Cm	ε_A	ε_B	ε_C	S_An开路故障输出三相相电压误差
>0	000	v_n	v_n	v_n	v_n	v_n	v_n	0	0	0	无误差
	001	v_n	v_n	v_p	v_n	v_n	v_p	0	0	0
	010	v_n	v_p	v_n	v_n	v_p	v_n	0	0	0
	011	v_n	v_p	v_p	v_n	v_p	v_p	0	0	0
	111	v_p	v_p	v_p	v_n	v_p	v_p	v_n-v_p	0	0
	100	v_p	v_n	v_n	v_n	v_n	v_n	v_n-v_p	0	0
	101	v_p	v_n	v_p	v_n	v_n	v_p	v_n-v_p	0	0
	110	v_p	v_p	v_n	v_n	v_p	v_n	v_n-v_p	0	0
i_A	S_ApS_BpS_Cp	正常情况输出三相相电压			S_An开路故障输出三相相电压			输出相电压误差			S_Ap开路故障输出三相相电压误差
i_A	S_ApS_BpS_Cp	u_A	u_B	u_C	u_Am	u_Bm	u_Cm	ε_A	ε_B	ε_C	S_Ap开路故障输出三相相电压误差
<0	000	v_n	v_n	v_n	v_p	v_n	v_n	v_p-v_n	0	0	无误差
	001	v_n	v_n	v_p	v_p	v_n	v_p	v_p-v_n	0	0
	010	v_n	v_p	v_n	v_p	v_p	v_n	v_p-v_n	0	0
	011	v_n	v_p	v_p	v_p	v_p	v_p	v_p-v_n	0	0
	111	v_p	v_p	v_p	v_p	v_p	v_p	0	0	0
	100	v_p	v_n	v_n	v_p	v_n	v_n	0	0	0
	101	v_p	v_n	v_p	v_p	v_n	v_p	0	0	0
	110	v_p	v_p	v_n	v_p	v_p	v_n	0	0	0

i_dc	S_ApS_BpS_Cp	正常情况输出三相相电压			整流级故障输出三相相电压			输出相电压误差
i_dc	S_ApS_BpS_Cp	u_A	u_B	u_C	u_Am	u_Bm	u_Cm	ε_A	ε_B	ε_C
>0	000	v_n	v_n	v_n	v_n	v_n	v_n	0	0	0
	001	v_n	v_n	v_p	v_n	v_n	v_n	0	0	v_n-v_p
	010	v_n	v_p	v_n	v_n	v_n	v_n	0	v_n-v_p	0
	011	v_n	v_p	v_p	v_n	v_n	v_n	0	v_n-v_p	v_n-v_p
	111	v_p	v_p	v_p	v_n	v_n	v_n	v_n-v_p	v_n-v_p	v_n-v_p
	100	v_p	v_n	v_n	v_n	v_n	v_n	v_n-v_p	0	0
	101	v_p	v_n	v_p	v_n	v_n	v_n	v_n-v_p	0	v_n-v_p
	110	v_p	v_p	v_n	v_n	v_n	v_n	v_n-v_p	v_n-v_p	0

整流级故障情况	S_ApS_BpS_Cp	出现误差相电压个数
上桥臂故障	001/010/100	1
	011/101/110	2
	111	3
下桥臂故障	011/101/110	1
	001/010/100	2
	000	3