CN108649825A - A kind of multiple faults partition method of cascade multilevel inverter - Google Patents

A kind of multiple faults partition method of cascade multilevel inverter Download PDF

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Publication number
CN108649825A
CN108649825A CN201810378877.2A CN201810378877A CN108649825A CN 108649825 A CN108649825 A CN 108649825A CN 201810378877 A CN201810378877 A CN 201810378877A CN 108649825 A CN108649825 A CN 108649825A
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bridge
failure
bridges
igbt
fault
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CN201810378877.2A
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CN108649825B (en
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张家慧
王天真
张米露
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Shanghai Maritime University
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Shanghai Maritime University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters

Abstract

The invention discloses a kind of multiple faults partition methods of cascade multilevel inverter, the driving of this method is used with mutually stacking sinusoidal pulse width modulation (Phase Disposition Sinusoidal Pulse Width Modulation, PD SPWM) algorithm.The multiple faults partition method is that quantity and the position of more level Cascade H-Bridge Inverter failure IGBT are determined according to the result of fault diagnosis first, and the IGBT based on this confirmation each two failure is located at different H bridges, different bridge arms and different groups；Hereafter, the drive signal by failure IGBT isolation, non-faulting IGBT in failure H bridges reconstructs；Finally the drive signal of non-faulting H bridges is reconstructed again.The Fault Isolation Strategy of the present invention has the characteristics that IGBT utilization rates, voltage fluctuation are relatively low in opposite raising failure bridge for more level Cascade H-Bridge Inverters.

Description

A kind of multiple faults partition method of cascade multilevel inverter
Technical field：
The present invention relates to being directed in field of power electronics to be happened at each two IGBT failures in different H bridges, different bridge arms And the failure separation method of the cascaded multilevel inverter of different groups
Background technology：
Inverter is a kind of converter plant that direct current energy is converted to AC energy.With the hair of power electronic technique Exhibition, the application field of inversion transformation technique is also broader, from convertible frequency air-conditioner, the frequency conversion refrigerator in life, until in D.C. high voltage transmission Current conversion station, then the airborne equipment to aviation field.In addition, with the aggravation of environmental pollution and fossil fuel crisis, with renewable Solar energy, the wind power generation etc. of energy power generation are more favored, and inverter is then important link therein.Therefore inversion in recent years The reasonable employment of device also causes more and more to pay close attention to.
When IGBT breaks down, the normal operation of inverter will be affected.This will lead to the voltage of electrical equipment not Balance and fluctuation of service, even result in system crash.This can be to living in or industrial production is different degrees of loss.Therefore, The application in multi-electrical level inverter of Fault Isolation is more and more important.
Present invention mainly solves the problems with encountered in multi-electrical level inverter process of fault isolation：
1) using increased production cost caused by additional switching tube isolated fault；
2) caused output voltage drop is too low after isolated fault bridge；
3) utilization rate of the healthy IGBT of failure bridge is low.
Invention content：
For above-mentioned the problem of being previously mentioned, the present invention innovatively proposes a kind of multiple faults of cascade multilevel inverter Partition method, the failure separation method mainly solve mostly event of each two IGBT failures in different H bridges, different bridge arms and different groups Barrier problem.This method mainly includes the following steps that：
1. confirming fault type
Quantity and the position of failure IGBT are determined according to the result of fault detection and diagnosis, and confirm each two failure IGBT It is located in different H bridges, different bridge arms and different groups.
2. the failure arm isolated algorithm of failure H bridges
For failure IGBTHiAjGk, the following institute of isolated algorithm of failure arm --- j-th of failure bridge arm of i-th of H bridge Show：
Wherein, urefiIndicate the modulating wave of i-th of H bridge when fault-free, urefi *Indicate the tune of the failure bridge arm after being isolated Wave processed.
3. the healthy arm restructing algorithm of failure H bridges
Wherein, λiFor the fault-signal of i-th of H bridge.When H bridge failures, fault-signal λi=1；Conversely, then λi=0. Because the partition method distinguishes failure in different H bridges, different bridge arms and different groups for IGBT, if f and g H bridge have event Barrier, and f<G, then λf=0 and λg=1.
4. the restructing algorithm of health H bridges
Wherein,
Description of the drawings：
Fig. 1 is the system structure diagram of multi-electrical level inverter failure separation method of the present invention
Fig. 2 is seven electrical level inverter model schematic of single-phase cascaded H-bridges
Isolation control front and back voltage oscillogram when Fig. 3 is this H3S1 and H2S2 failures
Specific implementation mode：
Step 1：Model construction：
(1) model feature and parameter：
(1) model is established according to system structure diagram shown in figure one, a list is built using Matlab/Simulink Seven level inverse conversion system model of phase cascaded H-bridges, structural representation are as shown in Figure 2；
(2) this model is controlled using PD-SPWM, frequency of modulated wave 50Hz, carrier frequency 3kHz, sample frequency For 50kHz；
(2) model fault setting：
(1) each IGBT is positioned, arbitrary IGBT is HiAjGk, indicate that the switch is located at i-th of H bridge, jth bridge arm, kth group It is interior, wherein i=1,2,3 ..., n, j=1,2, k=1,2；
Step 2：Implement the simulating, verifying of Fault Isolation
Implement the Fault Isolation Strategy for fault-signal, output voltage waveforms comparison diagram such as Fig. 3 institutes before and after Fault Isolation Show.In figure 3,0 to 0.2s is normal condition, and output voltage waveforms are sinusoidal and symmetrical seven level output waveform；0.2 to 0.4s is malfunction, and output voltage waveforms are sinusoidal asymmetrical five level output waveform；0.4 to 0.6 is after Fault Isolation State, output voltage waveforms are sinusoidal symmetrical five level output waveform.
It can be seen that, exported after failure separation method implementation sinusoidal by the comparison of output voltage waveforms before and after Fault Isolation Voltage waveform.Although failure has occurred there are two H bridges, voltage class only reduces two-stage.And the non-failure in failure H bridges IGBT is not thrown aside all, improves the utilization rate of health IGBT in failure bridge.In conclusion this method is for each There is a IGBT failures the opposite failure bridge health IGBT that improves to utilize and reduce electricity when being located at different H bridges, dissimilar arm and different groups Press the advantage of fluctuation.

Claims (1)

1. a kind of multiple faults partition method of the cascade multilevel inverter based on same phase stacking-sinusoidal pulse width modulation algorithm, Characterized by the following steps：
Step 1：Quantity and position that failure IGBT is determined according to fault diagnosis result determines fault type with this；
(1) confirm fault type：
(1) it receives fault-signal and analyzes；
(2) confirm that each two switching tube is opened a way respectively in different H bridges, different bridge arms and different groups；
Step 2：The Fault Isolation Strategy implemented to system after confirming fault type, including failure bridge failure IGBT be isolated therefore Hinder the reconstruct of bridge health arm and the reconstruct of health H bridges；
(1) the isolation strategy of failure H bridges failure arm is as follows：
(1) for (2n-1) electrical level inverter of single-phase n H bridges composition, then it is located at j-th of bridge arm kth group of i-th of H bridge Failure IGBTHiAjGkIsolated algorithm it is as follows：
(2) for formula in (1), urefiIndicate the modulating wave of i-th of H bridge when fault-free, urefi *Indicate the failure after being isolated The modulating wave of bridge IGBT；
(2) reconstruction strategy of failure H bridges health is as follows：
(1) λ is setiFor the fault-signal of i-th of H bridge.When H bridge failures, fault-signal λi=1；Conversely, then λi=0；
(2) because the isolated algorithm distinguishes failures in different H bridges, different bridge arms and different groups for two IGBT, if f and G H bridge is faulty, and f<G, then λf=0 and λg=1；
(3) based on above (2) each (3) it is assumed that the restructing algorithm of the healthy bridge arm of failure bridge is as follows：
(3) restructing algorithm of trouble-free healthy bridge is as follows：
(1) it is shown below for the restructing algorithm of trouble-free H bridges：
(2) to the matrix in more than needle (1)
CN201810378877.2A 2018-04-25 2018-04-25 Multi-fault isolation method for cascaded multi-level inverter Active CN108649825B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111458659A (en) * 2020-03-09 2020-07-28 合肥工业大学 Rapid diagnosis method for open-circuit fault of switching tube of cascaded H-bridge photovoltaic inverter
CN115510913A (en) * 2022-10-04 2022-12-23 兰州理工大学 Fault diagnosis method of H-bridge cascaded inverter based on data driving

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6381110B1 (en) * 2000-03-06 2002-04-30 General Motors Corporation Method and apparatus for detecting isolation faults in motor/inverter systems
CN101201391A (en) * 2007-12-11 2008-06-18 天津大学 Running state display and fault on-line diagnosis circuit for inverter
CN104698397A (en) * 2015-03-16 2015-06-10 浙江万里学院 Fault diagnosis method of multi-level inverter
CN105044624A (en) * 2015-08-11 2015-11-11 上海海事大学 Seven-electric level inverter with fault diagnosis function and fault diagnosis method
CN105119255A (en) * 2015-09-25 2015-12-02 国网山东省电力公司济南供电公司 Photovoltaic microgrid fault isolation method based on fault state
CN105811794A (en) * 2016-05-06 2016-07-27 上海海事大学 Fault-tolerant control method for reference voltage signal reconstruction of multi-level inverter
CN105811853A (en) * 2016-03-23 2016-07-27 华中科技大学 Fault-tolerant control method for power converter of embedded type variable-frequency speed control system
CN106655149A (en) * 2016-09-23 2017-05-10 滁州学院 Rapid power delivery power supply system capable of automatic fault isolation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6381110B1 (en) * 2000-03-06 2002-04-30 General Motors Corporation Method and apparatus for detecting isolation faults in motor/inverter systems
CN101201391A (en) * 2007-12-11 2008-06-18 天津大学 Running state display and fault on-line diagnosis circuit for inverter
CN104698397A (en) * 2015-03-16 2015-06-10 浙江万里学院 Fault diagnosis method of multi-level inverter
CN105044624A (en) * 2015-08-11 2015-11-11 上海海事大学 Seven-electric level inverter with fault diagnosis function and fault diagnosis method
CN105119255A (en) * 2015-09-25 2015-12-02 国网山东省电力公司济南供电公司 Photovoltaic microgrid fault isolation method based on fault state
CN105811853A (en) * 2016-03-23 2016-07-27 华中科技大学 Fault-tolerant control method for power converter of embedded type variable-frequency speed control system
CN105811794A (en) * 2016-05-06 2016-07-27 上海海事大学 Fault-tolerant control method for reference voltage signal reconstruction of multi-level inverter
CN106655149A (en) * 2016-09-23 2017-05-10 滁州学院 Rapid power delivery power supply system capable of automatic fault isolation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蔡红军: ""级联多电平电路的故障诊断与故障容错研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111458659A (en) * 2020-03-09 2020-07-28 合肥工业大学 Rapid diagnosis method for open-circuit fault of switching tube of cascaded H-bridge photovoltaic inverter
CN115510913A (en) * 2022-10-04 2022-12-23 兰州理工大学 Fault diagnosis method of H-bridge cascaded inverter based on data driving
CN115510913B (en) * 2022-10-04 2023-06-02 兰州理工大学 Fault diagnosis method of H-bridge cascade inverter based on data driving

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