CN103278727A - Output power-based diagnosis method for open-circuit fault of insulated gate bipolar transistor (IGBT) of three-phase inverter - Google Patents
Output power-based diagnosis method for open-circuit fault of insulated gate bipolar transistor (IGBT) of three-phase inverter Download PDFInfo
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Abstract
The invention discloses an output power-based diagnosis method for an open-circuit fault of an insulated gate bipolar transistor (IGBT) of a three-phase inverter. The method comprises the following steps of: A, respectively measuring three-phase voltages and three-phase currents by using a potential transformer (PT) and a current transformer (CT) installed on the output phase in the inverter, and respectively calculating the half-wave power corresponding to six half-wave currents of the three phases of the current period; and B, comparing the six half-wave power values with a set open-circuit fault power threshold value P0, if one or two half-wave power values are less than the set open-circuit fault power threshold value P0, judging that the corresponding IGBT causes an open-circuit fault; or if three half-wave power values are less than the set open-circuit fault power threshold value P0, judging that the IGBTs corresponding to the two half-wave power values on the same side cause the open-circuit fault. By the method, any one or two IGBTs which cause the open-circuit fault can be detected and positioned, so that a controller of the inverter can take a tolerance strategy and reduce waveform distortion conveniently; the inverter can be maintained in time; and the loss enlargement and accidents are avoided effectively.
Description
Technical field
The present invention relates to the diagnosis of power tube generation open fault in a kind of inverter; be particularly suitable for the inverter of various CVCF (constant voltage constant frequency) as the real-time detection of IGBT open fault and the usefulness of location, emergency protection and the fault-tolerant control for inverter simultaneously provides information.
Background technology
Extensive widespread use along with inverter, reliability and the security of its work are also brought into schedule gradually, if the safe and reliable operation level that can in time detect the unusual of inverter and take appropriate measures and will significantly improve total system in operational process.In the fault diagnosis of inverter, short trouble for IGBT power tube (igbt) has had ripe perfect solution, and for the IGBT open-circuit fault of power tubes that in reality, also exists, but do not obtain enough attention, but it needs also and can in time find and take measures.Because after having only two or IGBT power tube generation open fault in six IGBT power tubes, motor or other load often can also continue operation, are difficult for being found; But have very big harm, all the other IGBT will flow through bigger electric current in the case, and very big distortion also takes place waveform, can cause all the other IGBT damage, motor or other load heating, will cause bigger accident as untimely processing.
At present, open fault at power tube in the inverter, though also there is certain methods to be suggested, but these methods all are to identify fault according to distortion and the offset characteristic of fault after-current waveform, detection and the location that therefore can only be used for them single IGBT power tube generation open fault, thereby when the open fault of any two IGBT power tubes takes place, will cause erroneous judgement or fail to judge can not be in time, effectively take measures, avoid the expansion of losing and the generation of accident.
Summary of the invention
In order to overcome the deficiency of existing IGBT open-circuit fault of power tubes detection method, the present invention proposes a kind of diagnostic method of the three-phase inverter IGBT open fault based on output power, this method can detect the situation that open circuit takes place for any one or any two IGBT power tubes, and the location of realizing fault IGBT power tube, so that the controller of inverter is taked fault-tolerant strategy to carry out fault-tolerant control, is reduced the distortion of current waveform, and in time keep in repair, more effectively avoid the expansion of losing and the generation of accident.
The present invention realizes its goal of the invention, and the technical scheme that adopts is: a kind of diagnostic method of the three-phase inverter IGBT open fault based on output power, and its step is as follows:
A, calculate the power of the positive and negative half-wave correspondence of each phase current
Measure three-phase voltage u respectively by the voltage transformer (VT) summation current transformer that output in inverter is installed mutually
a, u
b, u
cWith three-phase current i
a, i
b, i
cUtilize the discrete formula of power calculation to calculate the current period three-phase half-wave power P of totally 6 half-wave current correspondences respectively
A+, P
A-, P
B+, P
B-, P
C+, P
C-
The detection of B, IGBT open fault and location
The three-phase that A step is obtained is totally 6 half-wave power P
A+, P
A-, P
B+, P
B-, P
C+, P
C-One by one with the open fault power threshold P that sets
0Relatively, if any one or two half-wave power less than open fault power threshold P
0, then judge the IGBT power tube generation open fault of respective half wave power correspondence; Three half-wave power are perhaps arranged less than open fault power threshold P
0, then judge the wherein IGBT power tube generation open fault of two half-wave power correspondences of homonymy.
The principle of the inventive method is:
The corresponding power P of positive and negative half-wave part of every phase current
A+, P
A-, P
B+, P
B-, P
C+, P
C-The working condition that has reflected upper and lower side (positive and negative side) the IGBT power tube of this phase brachium pontis A, B, C respectively.The half-wave power of going up (just) half-wave current correspondence that open fault will cause this phase takes place is 0 or for negative as (just) the side IGBT that goes up of certain phase brachium pontis; Under certain phase brachium pontis (bearing) side IGBT open fault can cause equally this mutually down half-wave power of (bear) half-wave current correspondence be 0 or for bearing.For normal IGBT, the half-wave power of its corresponding corresponding side is all for just.Therefore, as one or two half-wave power less than open fault power threshold P
0, then can judge the IGBT power tube generation open fault of respective half wave power correspondence.
In addition, when two IGBT of the homonymy of two brachium pontis opened a way simultaneously, the IGBT of heteropleural also will show the feature the same with the power tube of opening a way in the 3rd brachium pontis, and namely its corresponding half-wave power also is 0.Therefore, three half-wave power are arranged less than open fault power threshold P
0, then judge the wherein IGBT power tube generation open fault of two half-wave power correspondences of homonymy.
In the situation that three or three above IGBT power tubes break down, except the offside IGBT power tube situation that totally three are broken down of two IGBT power tubes of any two brachium pontis homonymies and a brachium pontis of residue, the capital causes the working condition severe exacerbation of motor load, fault tolerant control method can not weaken fault state at present, need not also can not carry out online detection and the fault-tolerant control of open fault again.
Above-mentioned open fault power threshold P
0It is the half-wave power P of 6 half-wave current correspondences
A+, P
A-, P
B+, P
B-, P
C+, P
C-1/10～1/3 of mean value.
The open fault power threshold P of She Dinging like this
0, can avoid in load increase and decrease process and interference that the transient state process during fault causes, and effectively detect the IGBT power tube that open fault takes place accurately.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention can detect the situation that open circuit takes place for any one or any two IGBT power tubes, and realization localization of fault, so that the controller of inverter is taked fault-tolerant strategy to carry out fault-tolerant control, is reduced the distortion of current waveform, and in time keep in repair, guaranteed the reliable and security of inverter and whole electric power system.Can be more effective avoid the expansion of losing and the generation of accident.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
The circuit theory diagrams of the inverter that Fig. 1 is suitable for for the inventive method and the voltage transformer (VT) summation current transformer of installation thereof.
T in the accompanying drawing
A+, T
B+, T
C+Be respectively the IGBT power tube of A, B, C phase brachium pontis upside; T
A-, T
B-, T
C-Be respectively the IGBT power tube of A, B, C phase brachium pontis downside.
Embodiment
Embodiment
Fig. 1 illustrates, and a kind of embodiment of the present invention is, a kind of diagnostic method of the three-phase inverter IGBT open fault based on output power, and its step is as follows:
A, calculate the power of the positive and negative half-wave correspondence of each phase current
The voltage transformer pt summation current transformer CT that installs mutually by output in inverter measures three-phase voltage u respectively
a, u
b, u
cWith three-phase current i
a, i
b, i
cUtilize the discrete formula of power calculation to calculate the current period three-phase half-wave power P of totally 6 half-wave current correspondences respectively
A+, P
A-, P
B+, P
B-, P
C+, P
C-
Wherein: P
A+The half-wave power of expression A phase positive half-wave electric current correspondence,
P
A-Expression A is the half-wave power of negative half-wave current correspondence mutually,
P
B+The half-wave power of expression B phase positive half-wave electric current correspondence,
P
B-Expression B is the half-wave power of negative half-wave current correspondence mutually,
P
C+The half-wave power of expression C phase positive half-wave electric current correspondence,
P
C-Expression C is the half-wave power of negative half-wave current correspondence mutually.
The detection of B, IGBT open fault and location
The three-phase that A step is obtained is totally 6 half-wave power P
A+, P
A-, P
B+, P
B-, P
C+, P
C-One by one with the open fault power threshold P that sets
0Relatively, if any one or two half-wave power less than open fault power threshold P
0, then judge the IGBT power tube generation open fault of respective half wave power correspondence; Three half-wave power are perhaps arranged less than open fault power threshold P
0, then judge the wherein IGBT power tube generation open fault of two half-wave power correspondences of homonymy.
Wherein, the open fault power threshold P of setting
0It is the half-wave power P of 6 half-wave current correspondences
A+, P
A-, P
B+, P
B-, P
C+, P
C-1/10～1/3 of mean value.
Below provide several concrete detections and location example:
As, work as P
B+＜P
0The time, then judge the IGBT power tube T of B phase brachium pontis upside
B+Open fault takes place;
As, work as P
A+＜P
0And P
A-＜P
0The time, then judge the IGBT power tube T of A phase brachium pontis upside and downside
A+, T
A-Open fault all takes place;
As, work as P
B+＜P
0And P
A-＜P
0The time, then judge the IGBT power tube T of B phase brachium pontis upside
B+, the IGBT power tube T of A phase brachium pontis downside
A-Open fault all takes place;
As, work as P
A+＜P
0, P
B+＜P
0And P
C-＜P
0The time, then judge the IGBT power tube T of A phase brachium pontis upside
A+With the B IGBT power tube T of brachium pontis upside mutually
B+Open fault all takes place, and does not assert the IGBT power tube T of C phase brachium pontis downside
C-Open fault takes place.
Claims (2)
1. diagnostic method based on the three-phase inverter IGBT open fault of output power, its step is as follows:
A, calculate the power of the positive and negative half-wave correspondence of each phase current
Measure three-phase voltage u respectively by voltage transformer (VT) (PT) summation current transformer (CT) that output in inverter is installed mutually
a, u
b, u
cWith three-phase current i
a, i
b, i
cUtilize the discrete formula of power calculation to calculate the current period three-phase half-wave power P of totally 6 half-wave current correspondences respectively
A+, P
A-, P
B+, P
B-, P
C+, P
C-
The detection of B, IGBT open fault and location
The three-phase that A step is obtained is totally 6 half-wave power P
A+, P
A-, P
B+, P
B-, P
C+, P
C-One by one with the open fault power threshold P that sets
0Relatively, if any one or two half-wave power less than open fault power threshold P
0, then judge the IGBT power tube generation open fault of respective half wave power correspondence; Three half-wave power are perhaps arranged less than open fault power threshold P
0, then judge the wherein IGBT power tube generation open fault of two half-wave power correspondences of homonymy.
2. the diagnostic method of a kind of three-phase inverter IGBT open fault based on output power according to claim 1 is characterized in that; Described open fault power threshold P
0It is the half-wave power P of 6 half-wave current correspondences
A+, P
A-, P
B+, P
B-, P
C+, P
C-1/10～1/3 of mean value.
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|---|---|---|---|
| CN2013101489010A CN103278727A (en) | 2013-04-26 | 2013-04-26 | Output power-based diagnosis method for open-circuit fault of insulated gate bipolar transistor (IGBT) of three-phase inverter |
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|---|---|---|---|
| CN2013101489010A CN103278727A (en) | 2013-04-26 | 2013-04-26 | Output power-based diagnosis method for open-circuit fault of insulated gate bipolar transistor (IGBT) of three-phase inverter |
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|---|---|
| CN103278727A true CN103278727A (en) | 2013-09-04 |
Family
ID=49061302
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|---|---|---|---|
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| CN103728514A (en) * | 2013-12-30 | 2014-04-16 | 北京京诚瑞达电气工程技术有限公司 | Method for diagnosing fault of low-voltage frequency converter |
| CN103869208A (en) * | 2014-03-07 | 2014-06-18 | 电子科技大学 | Open-circuit fault detection method for three-phase inverter with phase-redundant fault-tolerant structure |
| CN104133132A (en) * | 2014-07-21 | 2014-11-05 | 中国东方电气集团有限公司 | IGBT drive fault detection and diagnosis system |
| CN104597370A (en) * | 2015-02-16 | 2015-05-06 | 哈尔滨工业大学 | State observer-based detection method of open-circuit fault of IGBT (insulated gate bipolar transistor) of MMC (modular multilevel converter) |
| CN104898071A (en) * | 2015-06-12 | 2015-09-09 | 东南大学 | Fault diagnosis method for modularized multi-level inverter based on state observation |
| CN104965148A (en) * | 2015-07-20 | 2015-10-07 | 华中科技大学 | Inverter power transistor open-circuit fault real-time detection method in motor driving system |
| CN105891658A (en) * | 2016-06-06 | 2016-08-24 | 安徽大学 | Diagnosis method for open-circuit fault of inverter power tube |
| CN106019058A (en) * | 2016-07-07 | 2016-10-12 | 西北工业大学 | Phase current analysis based three-phase full-bridge inverter open-circuit fault diagnosis method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| CN101793928A (en) * | 2010-01-27 | 2010-08-04 | 广州电器科学研究院 | Phase-shifting full-bridge convertor real-time fault diagnosis method and system |
| CN102053210A (en) * | 2010-11-11 | 2011-05-11 | 哈尔滨工业大学 | IGBT stuck-open fault diagnosis method for three-phase inverter bridge of frequency converter |
| KR20120113908A (en) * | 2011-04-06 | 2012-10-16 | 부산대학교 산학협력단 | Diagnosis apparatus of the open-circuit fault in 3-phase ac/dc pwm converter and method thereof |
| CN102937688A (en) * | 2012-10-30 | 2013-02-20 | 浙江万里学院 | Device open-circuit fault diagnosis circuit for diode neutral point clamped (NPC) three-level inverter |
| CN102998588A (en) * | 2012-12-14 | 2013-03-27 | 山东理工大学 | Method for diagnosing common disconnection faults of brushless direct current motor inverter |
-
2013
- 2013-04-26 CN CN2013101489010A patent/CN103278727A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| CN101793928A (en) * | 2010-01-27 | 2010-08-04 | 广州电器科学研究院 | Phase-shifting full-bridge convertor real-time fault diagnosis method and system |
| CN102053210A (en) * | 2010-11-11 | 2011-05-11 | 哈尔滨工业大学 | IGBT stuck-open fault diagnosis method for three-phase inverter bridge of frequency converter |
| KR20120113908A (en) * | 2011-04-06 | 2012-10-16 | 부산대학교 산학협력단 | Diagnosis apparatus of the open-circuit fault in 3-phase ac/dc pwm converter and method thereof |
| CN102937688A (en) * | 2012-10-30 | 2013-02-20 | 浙江万里学院 | Device open-circuit fault diagnosis circuit for diode neutral point clamped (NPC) three-level inverter |
| CN102998588A (en) * | 2012-12-14 | 2013-03-27 | 山东理工大学 | Method for diagnosing common disconnection faults of brushless direct current motor inverter |
Non-Patent Citations (1)
| Title |
|---|
| 赏吴俊等: "基于IGBT输出功率的逆变器开路故障诊断方法", 《电网技术》, vol. 37, no. 4, 5 April 2013 (2013-04-05) * |
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| CN111948574B (en) * | 2020-07-31 | 2022-01-11 | 电子科技大学 | Method for quickly positioning open-circuit fault of inverter |
| CN112986784A (en) * | 2021-04-21 | 2021-06-18 | 国网江西省电力有限公司电力科学研究院 | Abnormity identification method and device for high-power welding type IGBT module |
| CN116435965A (en) * | 2023-04-13 | 2023-07-14 | 广州擎天实业有限公司 | Bridge arm fault detection method and device for rectifier bridge |
| CN116435965B (en) * | 2023-04-13 | 2024-03-19 | 广州擎天实业有限公司 | Bridge arm fault detection method and device for rectifier bridge |
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