CN104135141B - Energy obtaining circuit for series-connected IGBT dynamic voltage balancing control - Google Patents
Energy obtaining circuit for series-connected IGBT dynamic voltage balancing control Download PDFInfo
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- CN104135141B CN104135141B CN201410401656.4A CN201410401656A CN104135141B CN 104135141 B CN104135141 B CN 104135141B CN 201410401656 A CN201410401656 A CN 201410401656A CN 104135141 B CN104135141 B CN 104135141B
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- 230000003068 static effect Effects 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The invention relates to an energy obtaining circuit for series-connected IGBT dynamic voltage balancing control. The energy obtaining circuit comprises an RCD buffer circuit energy obtaining circuit and a static resistor energy obtaining circuit, wherein the RCD buffer circuit energy obtaining circuit obtains energy from a capacitor of an RCD buffer circuit connected with an IGBT in parallel, and the static resistor energy obtaining circuit obtains energy from a static resistor connected with the IGBT in parallel. The RCD buffer circuit energy obtaining circuit and the static resistor energy obtaining circuit respectively achieve collected output through an output diode. Switching losses of the IGBT are converted into electric energy necessary for control systems. According to the energy obtaining circuit, a stable direct current power supply is provided, the control circuit complexity degree and cost are reduced, system stability is improved, meanwhile, the impact of overvoltage and large current on a device is reduced, switching losses of the device are reduced, the buffer effect of the series-connected IGBT buffer circuit is improved, switching losses and temperature rise of the device are reduced, and system efficiency is improved.
Description
Technical field
The present invention relates to a kind of energy conversion technique, more particularly to a kind of to take energy for what series IGBT dynamic voltage balancing was controlled
Circuit.
Background technology
In the high voltage device for widely applying Power Electronic Technique system, single IGBT cannot meet requirement, it is necessary to use
Multiple IGBT are composed in series.Such as Large Copacity flexible direct current power transmission system, its voltage often reach hundreds of kilovolt, wherein converter valve
Exactly it is composed in series by powerful IGBT, its valve section devices in series quantity is connected by the IGBT of different capabilities according to conveying voltage
Form.Large Copacity inverter, dynamic reactive compensation circuit also often use IGBT cascaded structures.
When but IGBT connects, as the static parameter that device is caused in semiconductor technology is different, make on circuit topology
Into dynamic parameter it is different, and gate drive signal is asynchronous, causes the Voltage unbalance of Tandem devices.Especially exist
When dynamic, problem can be more serious, even causes device to damage because of overvoltage sometimes.Therefore dynamic electric voltage must be controlled
System, here it is dynamic voltage balancing technology.
There are operational amplifier chip, fpga chip and other devices in dynamic voltage balancing control circuit.Each IGBT is needed
Want a control circuit, it is also desirable to a fixed power source with the E ends of IGBT as common segment.If adopting power source special, due to
The high voltage of IGBT itself, a series of problems, such as DC source occurs electrical isolation, position, circuit, increased control system
Cost, complexity and unstability.
To sum up, the string of powerful IGBT and need the control system of dynamic voltage balancing guarantee circuit topology it is stable, and
The safety of device.The dynamic voltage balancing control of each IGBT of this system is required for a stable low-voltage dc power supply.
The content of the invention
The present invention be directed to the unbalanced dynamic voltage balancing control problem of series IGBT dynamic electric voltage, it is proposed that a kind of to be used to go here and there
What connection IGBT dynamic voltage balancings were controlled takes energy circuit, using the electric capacity in buffer circuit, the switching loss in IGBT is converted into moving
Low-voltage dc power supply required for state Pressure and Control, while reducing the switching loss of IGBT, improves in IGBT switching processes
Voltage current impact, improve system effectiveness.
The technical scheme is that：It is a kind of for series IGBT dynamic voltage balancing control take can circuit, including from
The RCD buffer circuits for taking energy in RCD buffer circuits IGBT in parallel on electric capacity take energy circuit, and from the static state in parallel with IGBT
The static resistance that energy is taken in resistance takes energy circuit, and RCD buffer circuits take energy circuit and static resistance takes energy circuit respectively through defeated
Go out diode and collect output.
The RCD buffer circuits take can circuit composition：
First electric capacity, auxiliary switch device, fly-wheel diode are connected in parallel on the electric capacity in the RCD buffer circuits of IGBT after connecting
Two ends, wherein auxiliary switch device and fly-wheel diode differential concatenation, the first isolating transformer primary side are connected in parallel on two pole of afterflow
Pipe two ends, the first isolating transformer secondary side are exported after rectifier bridge rectification, through filter capacitor in parallel and storage capacitor,
It is last to export through output diode again.
The base drive signal of the auxiliary switch device is identical with IGBT gate drive signal frequencies, dutycycle, while
It is switched on or off.
The static resistance takes can circuit composition：
3rd electric capacity is connected in parallel at static voltage sharing two ends, two diodes connect with two switching devices respectively after simultaneously
The 3rd electric capacity two ends are associated in, the negative electrode of one of diode connects second transformator primary side one end, the sun of another diode
Pole connects the primary side other end of the second transformator；The secondary side two ends of the second transformator connect respectively through another two diode anode
Connect, their negative electrode all connects inductance one end, another termination static resistance of inductance takes energy circuit output diode, the second transformator
Secondary side one end and indirect 4th electric capacity of inductance other end outfan..
The beneficial effects of the present invention is：The present invention takes energy circuit for what series IGBT dynamic voltage balancing was controlled, by IGBT
Switching loss be converted into electric energy necessary to various control systems.This circuit can not only provide galvanic current source, reduce
The complexity and cost of control circuit, improves system stability；Meanwhile, overvoltage, high current are reduced to device
Impact, reduces the switching loss of device, improves the buffering effect of series IGBT buffer circuit；And reduce the switch of device
Loss and temperature rise, improve system effectiveness.Can be widely used in as series IGBT in D.C. high voltage transmission, high-vol
Active voltage control system provide needed for electric energy, while get up supply monitoring, sensor etc. of electrical power storage can also be made
With improve non-maintaining property, reliability.
Description of the drawings
Fig. 1 is that the present invention takes the circuit diagram that and can realize high efficiency buffer from IGBT switching losses；
Fig. 2 is taken for RCD buffer circuits of the present invention can circuit diagram；
Fig. 3 is that the present invention installs the devices switch loss comparison diagram before and after RCD buffer circuits take energy circuit；
Fig. 4 is taken for static voltage sharing of the present invention can circuit diagram.
Specific embodiment
The circuit diagram that high efficiency buffer and can be realized is taken from IGBT switching losses as shown in Figure 1, originally take can circuit comprising from
Electric capacity in the RCD buffer circuits in parallel with IGBT, and electric energy in the static resistance in parallel with IGBT, is obtained, static resistance takes
Energy circuit takes energy end and is connected in parallel on static voltage sharing Rs2 two ends, and static resistance takes can circuit output end Jing diodes D2 outputs；
RCD buffer circuits take can circuit take can end be connected in parallel on the electric capacity in RCD buffer circuits, RCD buffer circuits take can circuit output
End Jing diodes D3 output, two parts output collect after together as entirely take can circuit output.
RCD buffer circuits take energy circuit diagram as shown in Figure 2, and electric capacity C1, auxiliary switch device Q, sustained diode 4 are connected
The electric capacity C two ends being connected in parallel in the RCD buffer circuits of IGBT afterwards, wherein auxiliary switch device Q and sustained diode 4 are reversely gone here and there
Connection, isolating transformer T1 primary sides are connected in parallel on diode D4 two ends, and the output of isolating transformer T1 secondary sides is whole through rectifier bridge D5
After stream, through filter capacitor C2 in parallel and storage capacitor Cout, then export through output diode D3.IGBT raster data models are believed
It is number identical with the base drive signal frequency of auxiliary switch device Q, dutycycle, while being switched on or off.
RCD buffer circuits take energy circuit operation principle, and when IGBT is turned off, buffering electric capacity C is electrically charged, electric capacity C energy storage.
When IGBT triggering and conductings, auxiliary switch device Q is also triggered conducting.At this moment, electric capacity C and C1 is buffered with transformator primary side electricity
Sense forms CL resonance circuits, and, by transformer coupled to secondary side, loss absorption when IGBT is switched by rectification circuit is simultaneously for electric energy
It is converted into electric energy.As CL resonance circuits have less AC impedance, buffer the electric energy in electric capacity C and mainly pass through CL resonance circuits
Change to transformator, the electric current buffered in electric capacity C is not discharged by IGBT substantially, reduce rush of current when IGBT is opened with
Switching loss, can realize zero current turning-on in theory.RCD buffer circuits take energy circuit and energy are taken in switching process.It is simultaneously real
IGBT over commutations, DC voltage conversion are showed, electrical power storage have been got up.Take can circuit and meanwhile strengthen to high current on IGBT,
The buffer capacity of overvoltage, reduces the switching loss of series IGBT.Before and after energy circuit being taken for installation RCD buffer circuits such as Fig. 3
Devices switch loss comparison diagram.
Static voltage sharing takes energy circuit diagram as shown in Figure 4, and electric capacity C3 is connected in parallel at static voltage sharing Rs2 two ends, and two
Pole pipe D6, D7 is connected in parallel on electric capacity C3 two ends, diode D6 anodes, the moon of D7 after connecting with switching device SW1, SW2 respectively in the same direction
Pole connects the primary side of transformator T2 respectively, and two outfan of secondary side of transformator T2 is connected with diode D8, D9 anode respectively, it
Negative electrode connect inductance L1 one end, inductance L1 other ends output termination static resistance take can circuit output diode D2, transformator
Secondary side one end of T2 and the indirect electric capacity C4 of inductance L1 other end outfans.
Static voltage sharing takes energy circuit operation principle, under quiescent conditions, takes energy circuit from static state in static resistance
Electric energy is obtained on resistance, its operation principle is identical with isolated DC translation circuit.When switching device does not also work, RCD delays
Rush circuit take can circuit can not get energy.When IGBT is turned off always, static voltage sharing takes energy, that is, in starting state
Electric energy needed for lower control circuit is taken in having static resistance can circuit offer.
RCD buffer circuits take energy circuit and static state takes energy circuit respectively by respective output diode D2, and D3 is in parallel.Have
Control circuit control stops static state and takes energy circuit work, to improve system effectiveness.
The switching loss of IGBT is converted into the available electric energy of conversion by the present invention, and can significantly decrease its course of work
In switching loss, mitigate switching process in excessive electric current and voltage build-up rate, improve converter plant efficiency.Originally taking can electricity
The electric energy that road obtains, can be that various control systems and other equipment directly provide electric energy, simplify extra power supply and its every
From circuit.The dynamic voltage balancing control circuit of Large Copacity IGBT that particularly can be to connect in direct-current transmission valve section provides electric energy.
The present invention can be widely used in for the active electrical of series IGBT in D.C. high voltage transmission, high-vol it is voltage-controlled
System processed provides required electric energy, uses while electrical power storage can also be got up and supply monitoring, sensor etc., improves and exempt from dimension
Shield property, reliability.Therefore the present invention has wide practical use.
Claims (4)
1. it is a kind of to take energy circuit for what series IGBT dynamic voltage balancing was controlled, it is characterised in that to include from the RCD in parallel with IGBT
The RCD buffer circuits for taking energy in buffer circuit on electric capacity take energy circuit, and energy is taken from the static resistance in parallel with IGBT
Static resistance takes energy circuit, and RCD buffer circuits take energy circuit and static resistance takes energy circuit and collects respectively through output diode
Output；Static resistance takes energy circuit, is that energy is taken when series IGBT is stably turned off；When, in IGBT turn off process states, RCD is buffered
Circuit takes energy circuit and takes energy；Compound the taking for series IGBT dynamic voltage balancing control of both composition two states can circuit.
2. be used for the control of series IGBT dynamic voltage balancing according to claim 1 takes energy circuit, it is characterised in that the RCD
Buffer circuit takes can circuit composition：
First electric capacity, auxiliary switch device, fly-wheel diode are connected in parallel on the electric capacity two in the RCD buffer circuits of IGBT after connecting
End, wherein auxiliary switch device and fly-wheel diode differential concatenation, the first isolating transformer primary side are connected in parallel on fly-wheel diode
Two ends, the first isolating transformer secondary side are exported after rectifier bridge rectification, through filter capacitor in parallel and storage capacitor, most
Export through output diode again afterwards.
3. be used for the control of series IGBT dynamic voltage balancing according to claim 2 takes energy circuit, it is characterised in that the auxiliary
The base drive signal of switching device is identical with IGBT gate drive signal frequencies, dutycycle, while being switched on or off.
4. be used for the control of series IGBT dynamic voltage balancing according to claim 1 takes energy circuit, it is characterised in that the static state
Resistance takes can circuit composition：
3rd electric capacity is connected in parallel at static voltage sharing two ends, and two diodes are connected in parallel on after being connected with two switching devices respectively
3rd electric capacity two ends, the negative electrode of one of diode connect second transformator primary side one end, and the anode of another diode connects
The primary side other end of the second transformator；The secondary side two ends of the second transformator connect respectively through another two diode anode,
Their negative electrode all connects inductance one end, another termination static resistance of inductance take can circuit output diode, the two of the second transformator
Indirect 4th electric capacity of secondary side negative voltage side and inductance other end outfan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401656.4A CN104135141B (en) | 2014-08-15 | 2014-08-15 | Energy obtaining circuit for series-connected IGBT dynamic voltage balancing control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401656.4A CN104135141B (en) | 2014-08-15 | 2014-08-15 | Energy obtaining circuit for series-connected IGBT dynamic voltage balancing control |
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| CN104135141A CN104135141A (en) | 2014-11-05 |
| CN104135141B true CN104135141B (en) | 2017-05-03 |
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| CN201410401656.4A Expired - Fee Related CN104135141B (en) | 2014-08-15 | 2014-08-15 | Energy obtaining circuit for series-connected IGBT dynamic voltage balancing control |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377942A (en) * | 2014-12-12 | 2015-02-25 | 中国电建集团中南勘测设计研究院有限公司 | High-voltage IGBT (insulated gate bipolar transistor) series conversion voltage-sharing circuit |
| CN105186864B (en) * | 2015-09-08 | 2019-02-05 | 国网智能电网研究院 | A kind of self-energizing DC transfer circuit that crimp type IGBT connects under application model |
| CN105186903B (en) * | 2015-09-18 | 2019-09-06 | 国网智能电网研究院 | A kind of taking for two-level inverter can circuit and its starting control method |
| CN105720822A (en) * | 2015-12-08 | 2016-06-29 | 国家电网公司 | Bidirectional DC/DC converter based on serial connection of SiC devices |
| CN108667441B (en) * | 2017-03-31 | 2022-07-26 | 通用电气公司 | Power semiconductor device and buffer circuit thereof |
| CN107612311A (en) * | 2017-08-18 | 2018-01-19 | 全球能源互联网研究院 | A kind of IGBT tandem types power model and its electric power system and control method |
| CN110380598A (en) * | 2019-07-11 | 2019-10-25 | 清华大学 | Device pressure resistance improvement method and device based on mixing dynamic electric voltage balance |
| CN111293867B (en) * | 2020-01-19 | 2021-08-27 | 浙江省计量科学研究院 | Direct current output circuit of stack AC ripple |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10045093A1 (en) * | 2000-09-12 | 2002-03-28 | Siemens Ag | Circuit arrangement for energy supply for a control circuit of a power semiconductor switch and method for providing the control energy for a power semiconductor switch |
| CN1645733A (en) * | 2004-01-23 | 2005-07-27 | 惠普开发有限公司 | Alternating current switching circuit |
| CN101719727A (en) * | 2009-12-14 | 2010-06-02 | 北京理工大学 | dc-dc converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002281737A (en) * | 2001-03-21 | 2002-09-27 | Fuji Electric Co Ltd | Igbt series connection type gate drive circuit |
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2014
- 2014-08-15 CN CN201410401656.4A patent/CN104135141B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10045093A1 (en) * | 2000-09-12 | 2002-03-28 | Siemens Ag | Circuit arrangement for energy supply for a control circuit of a power semiconductor switch and method for providing the control energy for a power semiconductor switch |
| CN1645733A (en) * | 2004-01-23 | 2005-07-27 | 惠普开发有限公司 | Alternating current switching circuit |
| CN101719727A (en) * | 2009-12-14 | 2010-06-02 | 北京理工大学 | dc-dc converter |
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| CB03 | Change of inventor or designer information |
Inventor after: Yang Dirui Inventor after: Yang Wenhuan Inventor after: Wang Chaoli Inventor after: Zhao Dongyuan Inventor before: Yang Dirui Inventor before: Yang Wenhuan Inventor before: Wang Chaoli |
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Free format text: CORRECT: INVENTOR; FROM: YANG DIRUI YANG WENHUAN WANG CHAOLI TO: YANG DIRUI YANG WENHUAN WANG CHAOLI ZHAO DONGYUAN |
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Effective date of registration: 20171115 Address after: 200093 Shanghai military road, Yangpu District, No. 516 Co-patentee after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Patentee after: University of Shanghai for Science and Technology Co-patentee after: State Grid Zhejiang Electric Power Company Address before: 200093 Shanghai military road, Yangpu District, No. 516 Patentee before: University of Shanghai for Science and Technology |
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Granted publication date: 20170503 Termination date: 20190815 |