CN104297701A - Turn-off testing platform for single bridge arm in three-level H bridge converter and method thereof - Google Patents

Turn-off testing platform for single bridge arm in three-level H bridge converter and method thereof Download PDF

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Publication number
CN104297701A
CN104297701A CN201410474715.0A CN201410474715A CN104297701A CN 104297701 A CN104297701 A CN 104297701A CN 201410474715 A CN201410474715 A CN 201410474715A CN 104297701 A CN104297701 A CN 104297701A
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China
Prior art keywords
level
bridge
current
igbt
control panel
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CN201410474715.0A
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CN104297701B (en
Inventor
姜科
张秀娟
赵香花
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Shanghai Rectifier Factory Co., Ltd.
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SIEYUAN QINGNENG POWER ELECTRONIC Co Ltd
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Abstract

The invention discloses a turn-off testing platform for a single bridge arm in a three-level H bridge converter and a method of the turn-off testing platform. The turn-off testing platform comprises any bridge arm to be tested in a three-level H bridge power module, a voltage regulator, a rectifier bridge, an electric reactor, a current Hall device, a testing control panel and a human-computer interface connected with the testing control panel. The output end of the voltage regulator is connected with the rectifier bridge, and a direct-current bus of the three-level H bridge power module is connected with the direct-current output of the rectifier bridge; an alternating-current outgoing line of the bridge arm to be tested in the three-level H bridge power module is connected with one end of the electric reactor, and the other end of the electric reactor penetrates through the current Hall device and is connected with the middle point of direct-current capacitors in the three-level H bridge power module; the current Hall device is connected with the testing control panel, and the testing control panel is connected with the three-level H bridge power module through optical fibers. It can be avoided that because the capacitor on the other half branch will be charged when a positive-sequence current or a negative-sequence current is triggered individually, the capacitance of the upper half branch and the capacitor of the lower half branch are unbalanced, and accurate measurement data can not be obtained.

Description

The shutoff test platform of the single brachium pontis in three level H bridge inverter and method thereof
Technical field
The present invention relates to power electronics neighborhood, more particularly, relate to shutoff test platform and the method thereof of the single brachium pontis in a kind of three level H bridge inverter.
Background technology
The progress of Adjoint technology, is widely applied in transmission and distribution networks by the power electronic equipment of three level H bridge topology formation, and the electric pressure and the capacity that form the power model of these equipment are also increasing.Test power model being carried out to rated capacity and performance is also more and more difficult.Conveniently test the performance of three level H bridge inverter, and reduce testing cost, therefore, market is badly in need of a kind of shutoff test platform for the single brachium pontis in three level H bridge inverter and method thereof.
Summary of the invention
For the defect existed in prior art, the object of this invention is to provide shutoff test platform and the method thereof of the single brachium pontis in a kind of three level H bridge inverter.
For achieving the above object, the present invention adopts following technical scheme:
According to a first aspect of the invention, provide the shutoff test platform of the single brachium pontis in a kind of three level H bridge inverter,
The man-machine interface comprising any one brachium pontis to be measured in three level H bridge power model, pressure regulator, rectifier bridge, reactor, current Hall, test control panel and be connected with described test control panel; The input end of described pressure regulator exchanges with 380V and is connected, and the output terminal of described pressure regulator is connected with described rectifier bridge; The DC bus of described three level H bridge power model exports with the direct current of rectifier bridge and is connected; The interchange outlet of the brachium pontis to be measured in described three level H bridge power model is connected with one end of reactor, and the other end of reactor passes current Hall and is connected with the mid point of the DC capacitor in described three level H bridge power model; Described current Hall is also connected with test control panel; Described test control panel is connected with described three level H bridge power model by optical fiber.
According to a second aspect of the invention, additionally provide a kind of method of testing realizing shutoff test platform described in first aspect,
Test control panel adopts the mode of forward-order current and negative-sequence current poll to carry out the test of shutoff superpotential to the device for power switching on brachium pontis to be measured.
The shutoff test pulse sequential of described forward-order current is:
1100、t1、0100、t2、1100、t2、0100、t2、0000、t2、0100、t2、0000;
Wherein, the figure place of tetrad code represents an IGBT in brachium pontis to be measured from left to right successively to the 4th IGBT, and 1 represents this IGBT conducting, and 0 represents that this IGBT turns off, t1 represents that three level H bridge power model electric current reaches the time of ratings, t2=0.1*t1.
The shutoff test pulse sequential of described negative-sequence current is:
0011、t1、0010、t2、0011、t2、0010、t2、0000、t2、0010、t2、0000;
Wherein, the figure place of tetrad code represents an IGBT in brachium pontis to be measured from left to right successively to the 4th IGBT, and 1 represents this IGBT conducting, and 0 represents that this IGBT turns off, t1 represents that three level H bridge power model electric current reaches the time of ratings, t2=0.1*t1.
The time interval of described forward-order current and negative-sequence current poll is 5 seconds.
Compared with prior art, adopt shutoff test platform and the method thereof of the single brachium pontis in a kind of three level H bridge inverter of the present invention, when can avoid owing to triggering separately positive sequence or negative-sequence current, can to another half capacitor charging, cause upper and lower half capacity unbalance and the situation that can not obtain measurement data accurately occurs.
Accompanying drawing explanation
Fig. 1 is the connection diagram of embodiments of the invention;
Fig. 2 is the principle schematic of the shutoff test circuit of embodiments of the invention;
Fig. 3 is the driving pulse sequence diagram of embodiments of the invention;
Fig. 4 is the shutoff test forward-order current commutation course schematic diagram of embodiments of the invention;
Fig. 5 is the shutoff test negative-sequence current commutation course schematic diagram of embodiments of the invention.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
Test platform as shown in Figure 1 and Figure 2, comprises three level H bridge power model M1, pressure regulator TR, rectifier bridge Z1, reactor L, current Hall LEM, test control panel B1, man-machine interface H1.Wherein the DC bus of three level H bridge power model M1 exports with the direct current of rectifier bridge and is directly connected; In three level module, the interchange outlet of brachium pontis to be measured is connected to reactor L, and the mid point that the other end of reactor is connected to DC capacitor C1, C2 in three level H bridge power model M1 through current Hall LEM is connected; The measuring-signal of current Hall LEM introduces the test control panel B1 of testing and control platform; Test control panel B1 is connected by the communication interface of optical fiber with three level H bridge power model M1.,
Three level H bridge power model M1 comprises DC capacitor C1, C2 of two groups of circuit units in parallel and 2 series connection, often organize circuit unit and comprise the IGBT to the 4th IGBTT1, T2, T3, T4 and 2 clamp diodes D5, D6 that connect successively, each IGBT is also provided with sustained diode 1 antiparallel with it, D2, D3, D4; Wherein, the emitter of an IGBT is connected with the collector of the 2nd IGBT, and the emitter of the 2nd IGBT is connected with the collector of the 3rd IGBT, and the emitter of the 3rd IGBT is connected with the collector of the 4th; Be connected in parallel between the collector of the 2nd IGBT and the emitter of the 3rd IGBT after described 2 clamp diodes series connection; Wherein, the negative electrode of the first clamp diode D5 is connected with the collector of the 2nd IGBT, and the anode of the second clamp diode D6 is connected with the emitter of the 3rd IGBT;
DC capacitor C1, C2 of 2 series connection are parallel between the positive and negative electrode input end of direct current, and the mid point of 2 DC capacitors is connected as DC voltage mid point with the mid point of 2 of series connection clamp diodes.It should be noted that, what can also adopt replaces 2 DC capacitors as two in Fig. 2 group electric capacity C1, C3, C2, a C4.
On the left and right brachium pontis of power model, the shutoff superpotential method of testing of each device for power switching is all consistent.In order to the convenience described, introduce IGBT switch function, 1 represents IGBT conducting, and 0 represents that IGBT turns off.Namely 1100 represent T1, T2 conducting, and T3, T4 turn off, and other on off states by that analogy.During owing to triggering separately positive sequence or negative-sequence current, can to another half capacitor charging, cause second capacity unbalance and can not obtain measurement data accurately, so we adopt the mode of forward-order current and negative-sequence current poll to test, concrete test pulse as shown in Figure 3.As shown in Figure 4, the commutation course of forward-order current as shown in Figure 5 for the commutation course of forward-order current.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to object of the present invention is described, and be not used as limitation of the invention, as long as in essential scope of the present invention, the change of the above embodiment, modification all will be dropped in the scope of claim of the present invention.

Claims (5)

1. a shutoff test platform for the single brachium pontis in three level H bridge inverter, is characterized in that,
The man-machine interface (H1) comprising any one brachium pontis to be measured in three level H bridge power model (M1), pressure regulator (TR), rectifier bridge (Z1), reactor (L), current Hall (LEM), test control panel (B1) and be connected with described test control panel (B1); The input end of described pressure regulator (TR) exchanges with 380V and is connected, and the output terminal of described pressure regulator (TR) is connected with described rectifier bridge (Z1); The DC bus of described three level H bridge power model (M1) exports with the direct current of rectifier bridge (Z1) and is connected; The interchange outlet of the brachium pontis to be measured in described three level H bridge power model (M1) is connected with one end of reactor (L), and the other end of reactor passes current Hall (LEM) and is connected with the mid point of the DC capacitor (C1, C2) in described three level H bridge power model (M1); Described current Hall (LEM) is also connected with test control panel (B1); Described test control panel (B1) is connected with described three level H bridge power model (M1) by optical fiber (X1).
2. realize a method of testing for shutoff test platform according to claim 1, it is characterized in that,
Test control panel adopts the mode of forward-order current and negative-sequence current poll to carry out the test of shutoff superpotential to the device for power switching on brachium pontis to be measured.
3. method of testing according to claim 2, is characterized in that:
The shutoff test pulse sequential of described forward-order current is:
1100、t1、0100、t2、1100、t2、0100、t2、0000、t2、0100、t2、0000;
Wherein, the figure place of tetrad code represents an IGBT in brachium pontis to be measured from left to right successively to the 4th IGBT, and 1 represents this IGBT conducting, and 0 represents that this IGBT turns off, t1 represents that three level H bridge power model electric current reaches the time of ratings, t2=0.1*t1.
4. method of testing according to claim 2, is characterized in that:
The shutoff test pulse sequential of described negative-sequence current is:
0011、t1、0010、t2、0011、t2、0010、t2、0000、t2、0010、t2、0000;
Wherein, the figure place of tetrad code represents an IGBT in brachium pontis to be measured from left to right successively to the 4th IGBT, and 1 represents this IGBT conducting, and 0 represents that this IGBT turns off, t1 represents that three level H bridge power model electric current reaches the time of ratings, t2=0.1*t1.
5. method of testing according to claim 2, is characterized in that:
The time interval of described forward-order current and negative-sequence current poll is 5 seconds.
CN201410474715.0A 2014-09-17 2014-09-17 The shut-off test platform and its method of single bridge arm in three level H-bridge inverters Expired - Fee Related CN104297701B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965136A (en) * 2015-06-18 2015-10-07 国电南瑞科技股份有限公司 Three-level converter power unit double pulse test method
CN107124105A (en) * 2017-05-05 2017-09-01 南京理工大学 Improve isolated form three-level PFC converter PF control system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006262632A (en) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd Controller for inverter for driving motor
CN103091587A (en) * 2013-01-24 2013-05-08 山东新风光电子科技发展有限公司 Energy-saving inverter test circuit and control method
CN203522549U (en) * 2013-08-07 2014-04-02 国家电网公司 Distributed power grid-connected inverter testing ac source capable of island test
CN103852663A (en) * 2013-08-06 2014-06-11 国家电网公司 Energy feedback type distributed photovoltaic power inverter integrated test system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006262632A (en) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd Controller for inverter for driving motor
CN103091587A (en) * 2013-01-24 2013-05-08 山东新风光电子科技发展有限公司 Energy-saving inverter test circuit and control method
CN103852663A (en) * 2013-08-06 2014-06-11 国家电网公司 Energy feedback type distributed photovoltaic power inverter integrated test system
CN203522549U (en) * 2013-08-07 2014-04-02 国家电网公司 Distributed power grid-connected inverter testing ac source capable of island test

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965136A (en) * 2015-06-18 2015-10-07 国电南瑞科技股份有限公司 Three-level converter power unit double pulse test method
CN107124105A (en) * 2017-05-05 2017-09-01 南京理工大学 Improve isolated form three-level PFC converter PF control system and method
CN107124105B (en) * 2017-05-05 2019-06-25 南京理工大学 Improve the control system and method for isolated form three-level PFC converter PF

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Effective date of registration: 20190423

Address after: 200030 No. 640 Hongqiao Road, Xuhui District, Shanghai

Patentee after: Shanghai Rectifier Factory Co., Ltd.

Address before: No. 3399, Huing Road, Minhang District, Shanghai City, Shanghai

Patentee before: Sieyuan Qingneng Power Electronic Co., Ltd.

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