CN102208869A - DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs - Google Patents

DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs Download PDF

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Publication number
CN102208869A
CN102208869A CN2011101376795A CN201110137679A CN102208869A CN 102208869 A CN102208869 A CN 102208869A CN 2011101376795 A CN2011101376795 A CN 2011101376795A CN 201110137679 A CN201110137679 A CN 201110137679A CN 102208869 A CN102208869 A CN 102208869A
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CN
China
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voltage
current
module
sharing
input
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CN2011101376795A
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Chinese (zh)
Inventor
朱琦
周峰
王慧贞
龚春英
肖岚
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南京航空航天大学
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Priority to CN2011101376795A priority Critical patent/CN102208869A/en
Publication of CN102208869A publication Critical patent/CN102208869A/en

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Abstract

With the fast development of power electronic technologies, the development of power electronic system integration techniques becomes a tendency. In application situations of high-voltage input and large-current output, a DC (direct-current) converter system with multiple modules having series inputs and parallel outputs can be used widely. The key problem of the DC (direct-current) converter system with multiple modules having series inputs and parallel outputs is to ensure voltage sharing of input ends of all modules in the system. For the purpose of realizing the voltage sharing, a voltage loop, a current loop and a voltage-sharing ring are traditionally used to control, each module is required to input voltage detection signals, the circuit is complicated and the control difficulty is high. The invention provides a voltage-sharing technology among modules at input ends, thus realizing the voltage sharing of the multiple modules at the input ends. The control characteristics are as follows: a voltage-current dual-loop control method is adopted, voltage sampling is output voltage sampling, current sampling is the total current sampling of the current output of each module, and each module is controlled by the same duty ratio, thus realizing the voltage sharing at the input ends. The circuit is controlled simply and certain redundancy is provided.

Description

Input series and output parallel multimode DC converter technology of pressure equalization

Technical field

The present invention relates to a kind of input series and output parallel multimode DC converter technology of pressure equalization, belong to the control technology of the DC converter in the Power Conversion.

Background technology

At present, the DC converter of high voltage input low-voltage, high-current output type is widely used in industries such as electrolytic aluminium, track traffics.When adopting single module structure, the main circuit power tube need be selected injectron or multitube series connection for use.When selecting the high-voltage power pipe for use, make complete machine cost height, and multitube serial connection technology complexity has only fewer companies to grasp, therefore,, often adopt the mode of multimode series connection in the occasion of high pressure input.For efficient and the reliability that improves converter, the research of importing the topological sum control method of big current-output type DC converter at high pressure has a lot.Along with developing rapidly of power electronic technology, the power electronic system integrated technology also becomes a development trend.The key issue of input series and output parallel multimode DC converter system is that the input of each module in the assurance system is all pressed, the current-sharing of output nature.In order to achieve this end, current existing several different methods realizes all pressures sharing control between each module, and complicated control strategy realizes but all be based on, and the components and parts of use are of a great variety.Typical as three rings (Voltage loop, electric current loop, grading ring) are controlled, and need each module input voltage detection signal, circuit complexity, control difficulty height.This patent proposition is a kind of only uses regulation loop and electric current loop without grading ring control, and all modules of converter run on same drive signal, work under identical duty ratio, relies on intermodule all to press naturally and realizes all pressing current-sharing, and circuit control simply.And can be when each module to be started working, duty ratio slowly increases, and realizes soft open-minded; When system's operate as normal, if module generation input short trouble is arranged, other module can realize new steady-working state automatically.

Summary of the invention

The present invention proposes a kind of novel control model, in order to solve all pressures problem of input series and output parallel multimode DC converter.

This control method is characterised in that: each module is used identical drive signal, works under same duty cycle, and current sample is the total current sampling of each module output current.Under this control model, during steady operation on each module input capacitance voltage identical.When the input fluctuation causes U A>U B, output current L then Out-A>I Out-B, and two module synchronous operations, input current equates, must cause the Q of modules A input capacitance A is put>Q B is put, U then ADescend U A, U BTend towards stability.This analysis is equally applicable to a plurality of module connection in series-parallel applied in any combination.

This patent adopts same duty cycle to control all modules, and current sample is the output total current, realizes all pressures of each module of input, and the advantage of this control method is:

(1) this control method is used for the multimode DC converter of input series and output parallel, can satisfy the demand that each module of input is all pressed, and uses dicyclo control in the control, and circuit is simple, realizes easily.

(2) this control method is used identical duty ratio, and duty ratio slowly becomes big when opening, and can realize the soft start work of all modules.

(3) this control method is used for the multimode DC converter of input series and output parallel, after the switching tube of wherein one or more module inputs lost efficacy and module input by short circuit, each module can reach stable state again.Therefore, converter can be designed to the redundant combination of n+m as requested, even the operation that converter still can normal reliable after making m module inefficacy input by short circuit.

Description of drawings

Fig. 1 is an input series and output parallel multimode DC converter system control schematic diagram.

Fig. 2 is the control block diagram of input series and output parallel multimode DC converter system.

The main designation of Fig. 1---Fig. 2: (1) (C 1To C n)---module 1 is to the input capacitance of module n; (2) U In, U o, u o, u Ref---be respectively input voltage, output voltage, the voltage sample of output, the reference voltage of output voltage regulator; (3) i o---the sampling of each module output total current in the DC converter.

Embodiment

Fig. 1 is an input series and output parallel multimode DC converter system control schematic diagram, and wherein module 1 is a n independent identical DC converter module to module n, module 1 to module n at input respectively at separately input capacitance C 1To C nParallel connection, input series and output parallel multimode DC converter system has been formed in the output parallel connection of each module.Control mode adopts the dicyclo controlling schemes, output voltage sampling and output voltage benchmark are through voltage regulator, enter controller after regulating through current regulator with the sampling of output total current again and produce drive signal, adopt identical drive signal through isolating each module of rear drive, each module adopts same duty cycle control.

Embodiment is as shown in Figure 2: output reference voltage u RefBe connected to the in-phase input end of Voltage loop adjuster, the sampled voltage u of output oBe connected on the inverting input of Voltage loop adjuster, the output of Voltage loop adjuster and output inductor current sample i oInsert the in-phase input end and the inverting input of current inner loop adjuster respectively.The output of current inner loop adjuster is handed over to cut with the triangular wave carrier after the synchronizing signal adjusting and is produced a PWM ripple, each module of this PWM ripple control DC converter, the identical duty cycle adjustment of each module use.

Claims (1)

1. input series and output parallel multimode DC converter technology of pressure equalization, modular circuit master's topology adopts band isolating transformer Buck quasi-converter, control strategy adopts the dicyclo control of outer voltage current inner loop, voltage adopts output voltage, current sample is the total current sampling of each module output current, and the power tube drive signal of each module adopts identical duty ratio control.
CN2011101376795A 2011-05-26 2011-05-26 DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs CN102208869A (en)

Priority Applications (1)

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CN2011101376795A CN102208869A (en) 2011-05-26 2011-05-26 DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs

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Application Number Priority Date Filing Date Title
CN2011101376795A CN102208869A (en) 2011-05-26 2011-05-26 DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs

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CN102208869A true CN102208869A (en) 2011-10-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647090A (en) * 2012-04-09 2012-08-22 浙江涵普电力科技有限公司 Large-power power supply of double-power amplifier
CN103312150A (en) * 2013-05-21 2013-09-18 东南大学 Voltage balancing control method of input-series and output-parallel combined converter
CN103944395A (en) * 2014-04-04 2014-07-23 上海电机学院 Preceding stage DC converter for proton exchange membrane fuel cell and construction method thereof
CN104980015A (en) * 2015-07-03 2015-10-14 哈尔滨工业大学深圳研究生院 Current difference control method for input-series and output-parallel type DC/DC converter
CN104518661B (en) * 2014-12-31 2016-10-05 北京理工大学 Vertical control method on the distributing of ISOP modularity DC-DC converter
CN106877646A (en) * 2017-03-03 2017-06-20 浙江大学 Wireless voltage feedforward control system and method suitable for being input into series connection/output-parallel system
CN107612343A (en) * 2017-09-25 2018-01-19 深圳通业科技股份有限公司 A kind of series interleaved two-transistor forward converter
CN109256954A (en) * 2018-10-26 2019-01-22 国网江苏省电力有限公司南通供电分公司 A kind of tandem type electric power electric transformer distributed director of no real time communication
CN109861497A (en) * 2018-12-30 2019-06-07 国网北京市电力公司 Sharing control device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100314937A1 (en) * 2009-06-11 2010-12-16 Jacobson Boris S Reconfigurable multi-cell power converter
CN102013826A (en) * 2010-12-01 2011-04-13 北京理工大学 Stable current control method for input-series output-parallel high-frequency link inverter module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100314937A1 (en) * 2009-06-11 2010-12-16 Jacobson Boris S Reconfigurable multi-cell power converter
CN102013826A (en) * 2010-12-01 2011-04-13 北京理工大学 Stable current control method for input-series output-parallel high-frequency link inverter module

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GIRI,R,CHOUDHARY,V;AYYANAR, R;MOHAN,N: "Common-Duty-Ratio Control of Input-Series Connected Modular DC-DC Converters With Active Input Voltage and Load-Current Sharing", 《IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》 *
LINBING WANG, ZHEJIANG UNIV., HANGZHOU,, XIANGNING HE: "Input-Series and Output-Parallel Connection Modular DC-DC Converters with Interleaved Constant Duty Cycle Control Strategy", 《INDUSTRIAL ELECTRONICS SOCIETY, 2007. IECON 2007. 33RD ANNUAL CONFERENCE OF THE IEEE》 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647090A (en) * 2012-04-09 2012-08-22 浙江涵普电力科技有限公司 Large-power power supply of double-power amplifier
CN103312150A (en) * 2013-05-21 2013-09-18 东南大学 Voltage balancing control method of input-series and output-parallel combined converter
CN103312150B (en) * 2013-05-21 2015-11-18 东南大学 A kind of pressure equalizing control method of input series and output parallel combined converter
CN103944395A (en) * 2014-04-04 2014-07-23 上海电机学院 Preceding stage DC converter for proton exchange membrane fuel cell and construction method thereof
CN103944395B (en) * 2014-04-04 2017-02-08 上海电机学院 Preceding stage DC converter for proton exchange membrane fuel cell and construction method thereof
CN104518661B (en) * 2014-12-31 2016-10-05 北京理工大学 Vertical control method on the distributing of ISOP modularity DC-DC converter
CN104980015A (en) * 2015-07-03 2015-10-14 哈尔滨工业大学深圳研究生院 Current difference control method for input-series and output-parallel type DC/DC converter
CN104980015B (en) * 2015-07-03 2018-04-06 哈尔滨工业大学深圳研究生院 The electric current difference control method of the DC/DC converters of input series and output parallel
CN106877646A (en) * 2017-03-03 2017-06-20 浙江大学 Wireless voltage feedforward control system and method suitable for being input into series connection/output-parallel system
CN107612343A (en) * 2017-09-25 2018-01-19 深圳通业科技股份有限公司 A kind of series interleaved two-transistor forward converter
CN109256954A (en) * 2018-10-26 2019-01-22 国网江苏省电力有限公司南通供电分公司 A kind of tandem type electric power electric transformer distributed director of no real time communication
CN109861497A (en) * 2018-12-30 2019-06-07 国网北京市电力公司 Sharing control device

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Application publication date: 20111005