CN103683857A - Direct-current draw-out power supply of IEGT power module - Google Patents
Direct-current draw-out power supply of IEGT power module Download PDFInfo
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Abstract
The invention relates to a direct-current draw-out power supply of an IEGT power module in the field of high-power electric and electronic converters. A main circuit comprises a filter circuit, a non-isolated flyback converter and an isolated push-pull converter. After input high-voltage direct-current electric energy is filtered through the filter circuit, first-stage conversion is performed on electric energy signals through the non-isolated flyback converter, bus high voltages are converted into DC400V electric signals, filtering processing is performed on the electric signals, then second-stage conversion processing is performed on the electric signals through the isolated push-pull converter, and finally a high-location draw-out power supply can output DC15V electric signals stably and safely after full-wave rectification is performed on the electric signals through a rectifying circuit (picture 4). The draw-out power supply can output direct-current input voltages within the range of 300Vdc-3700Vdc, and can be cooled naturally, provide electricity for operation of the IEGT power module and run safely and reliably in a complicated electromagnetic field environment.
Description
Technical field
The direct current that the present invention relates to the IEGT power model in a kind of high-power power electronic converter field is got energy power supply.
Background technology
The basic composition unit of high-power many level cascade converter is power model, by power model, is composed in series.The topology of power model is all DC/AC scheme substantially, realizes DC(direct current) and AC(exchange) conversion between energy.DC side adopts capacitor to carry out energy storage conventionally.
The core component of power model is large power all-controlled transistor, at present conventional IGBT, IEGT and the StakPak etc. of comprising.On domestic market, take IGBT power model as main, and IEGT power model only has Yi Ge supplier, and StakPak power model does not also have supplier at present.
Each power model has control device and the protective device of oneself, and these devices all need power supply, how to get that to carry out the required power supply of generator be a difficult point and key point.Current getting can mode comprise: energy is got on direct current side-draw energy and ground.
Direct current side-draw energy: obtain energy from DC energy storage element (bus large bulk capacitance); adopt advanced multitube string-and cascade inverse-excitation type DC-DC converter technique; realize high-low pressure isolated variable; in addition complete reliable testing circuit, feedback circuit, protective circuit again, the control protective unit that final stability and safety ground is power model provides lasting power supply.
Ground get can: the distribution system (380V) in equipment Zhan Neihuo factory of take is the energy, isolates, for the control protective unit of power model provides power supply by transformation of electrical energy and high pressure.
Above two kinds of pluses and minuses comparisons of getting energy mode: the advantage that direct current is got energy is the application in superhigh pressure field, such as flexible DC power transmission converter, voltage surpasses 100kV easily, in such system, it can be unpractical from ground, getting, technical difficulty is large and cost is high, and it can be only way that direct current is got.In system below 35kV, both can adopt ground to get can, also can adopt direct current to get energy, adopt ground to get can have a benefit is to allow current transformer under any circumstance to start, and adopts direct current to get in the situation that can need current transformer to be connected with electrical network and just can start working.
At present, get for two kinds and can mode all realize and come into operation at IGBT power model, but direct current is got energy, input voltage often be no more than 1700V, and reason is conventionally to select 3300V and following IGBT for cost consideration manufacturer.And for IEGT power model, before the present invention occurs, only realized ground and got energy.
Summary of the invention
The direct current that the object of this invention is to provide a kind of IEGT power model is got energy power supply, this is got and can power supply can realize that in the scope of DC input voitage 300Vdc～3700Vdc, get can, naturally cooling, for the work of IEGT power model provides control power supply, and work that can be safe and reliable under complex electromagnetic fields environment.
For achieving the above object, the present invention is achieved through the following technical solutions:
The direct current of IEGT power model is got energy power supply, at space structure cloth, be set up, direct current energy taking device is between IEGT valve string and power model control board, the input of direct current energy taking device is connected with the IEGT valve string fin as direct electrified body, IEGT valve string fin is positioned at the outside of IEGT valve string, and IEGT valve string fin is connected with DC capacitor by connecting busbar; Direct voltage sampling plate and IEGT drive plate are arranged in direct current and get between energy power supply and IEGT valve string;
The main circuit that direct current is got energy power supply comprises filter circuit, non-isolation anti exciting converter, isolation push-pull converter, filter circuit is comprised of common mode inductance, resistance, electric capacity, positive and negative two inputs in high voltage input terminal are respectively equipped with common mode inductance, the common mode inductance two ends that are connected to the positive and negative input of high pressure are respectively gone here and there by a string all pressures that are comprised of resistance shunt capacitance, form filter circuit; Non-isolation anti exciting converter is comprised of a plurality of power circuit cascades, the input series connection of each power circuit, and output is in parallel, and the input of the power circuit being connected in series is connected with filter circuit output; The output of non-isolation anti exciting converter is connected with the input of isolation push-pull converter.
Compared with prior art, the invention has the beneficial effects as follows:
The direct voltage of 1.MMC-HVDC converter is conventionally all higher, and at least, more than 100kV, it can be unpractical for ground, getting; Power model designs based on 4500V-IEGT, its high voltage bearing characteristic also will ask energy taking device should possess equally the ability of stable operation under high-pressure situations, the present invention gets and can power supply can realize that in the scope of DC input voitage 300Vdc～3700Vdc, get can, naturally cooling, for the work of IEGT power model provides control power supply, and work that can be safe and reliable under complex electromagnetic fields environment.
2. due to the raising of single power model fan-out capability, the same required module number of electric pressure converter equipment will greatly reduce, thereby in cost-saving, also make it possess more space-saving advantage.
Direct current of the present invention get can power supply can be for the power model based on 4500V-IEGT, and power model based on 4500V-IEGT can be for MMC-HVDC converter, the occasions such as high-voltage static var generator (such as 35kV-STATCOM).
4. the present invention has filled up the blank that IEGT power model direct current is got energy, for the application of many level of high-power cascade converter provides new space and market, especially flexible DC power transmission field, the input voltage maximum that direct current of the present invention is got energy power supply reaches 3700V, and considerably beyond IGBT power model direct current, getting can input voltage.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention.
Fig. 2 is structure side view of the present invention.
Fig. 3 is electrical structure block diagram of the present invention.
Fig. 4 is electrical schematic diagram of the present invention.
Fig. 5 is power circuit cascade schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
See Fig. 1, Fig. 2, the direct current of IEGT power model is got energy power supply, at space structure cloth, be set up, direct current energy taking device 1 is between IEGT valve string 3 and power model control board 6, the input of direct current energy taking device 1 is connected with the IEGT valve string fin 4 as direct electrified body, IEGT valve string fin 4 is positioned at the outside of IEGT valve string 3, and IEGT valve string fin 4 is connected with DC capacitor 5 by connecting busbar 7 and DC capacitor terminal 8; Direct voltage sampling plate and IEGT drive plate 2 are arranged between direct current energy taking device 1 and IEGT valve string 3.
See Fig. 3, Fig. 4, Fig. 5, the main circuit that direct current is got energy power supply comprises filter circuit, non-isolation anti exciting converter, isolation push-pull converter, filter circuit is comprised of common mode inductance, resistance, electric capacity, positive and negative two inputs in high voltage input terminal are respectively equipped with common mode inductance, the common mode inductance two ends that are connected to the positive and negative input of high pressure are respectively gone here and there by a string all pressures that are comprised of resistance shunt capacitance, form filter circuit.Non-isolation anti exciting converter is comprised of a plurality of power circuit cascades, the input series connection of each power circuit, and output is in parallel, and the input of the power circuit being connected in series is connected with filter circuit output; The output of non-isolation anti exciting converter is connected with the input of isolation push-pull converter.The output of isolation push-pull converter is connected with rectification circuit.Described power circuit is comprised of high frequency energy-storage transformer, LC filter, diode, output filter capacitor, switching tube, isolation push-pull converter is comprised of switching tube, transformer, input at isolation push-pull converter is provided with isolation accessory power supply, at the output of isolating push-pull converter, is provided with fault collection circuit.
The course of work that the direct current of IEGT power model is got energy power supply is: as shown in Figure 3, the high voltage direct current electric energy of input is after filtering after circuit filtering, by start-up circuit, signal is passed to the protection of input overvoltage/undervoltage and control circuit, the protection of input overvoltage/undervoltage and control circuit make power supply in running order, electric power signal converts through the first order through non-isolation anti exciting converter, bus high pressure is converted to the signal of telecommunication of DC400V and processes after filtering, the signal of telecommunication after filtering is processed carries out second level isolated variable processing through isolation push-pull converter again, full-wave rectification finally by over commutation circuit (Fig. 4), make a high position get can power supply can stability and safety the signal of telecommunication of output DC15V.
Direct current of the present invention get can technique device can in the scope of DC input voitage 300Vdc～3700Vdc, get can, naturally cooling, for the work of IEGT power model provides control power supply, and work that can be safe and reliable under complex electromagnetic fields environment.
Technological difficulties of the present invention are:
1. direct current is got energy Power Management Design
Under the prerequisite of clear and definite parameter request, how to design satisfactory direct current and get energy power supply, difficult point comprises: the input voltage range of non-constant width (300Vdc～3700Vdc), volume is little, and reliability is high.
2. in IEGT power model, integrated DC is got energy power supply
Under high pressure, strong electromagnetic interference environment, how direct current is got and can be integrated in IEGT power model system by power supply, work in coordination and co-ordination with other parts.
Concrete solution of the present invention is:
1. locus.
When direct current energy taking device is installed, should avoid it oversize with power receiving equipment distance, cause its EMI characteristic decline, also to take into account it and put and do not make power model volume too large.So the present invention puts direct current energy taking device 1 between IEGT valve string and power model control board 6, and direct voltage sampling plate and IEGT drive plate 2 are arranged between direct current energy taking device 1 and IEGT valve string 3.
First, when valve design string structure, just considered the energy problem of getting of device, herein, positive and negative two electrodes of electric capacity are connected in to IEGT valve string fin 4 by connecting busbar 7, the input of direct current energy taking device 1 is connected with IEGT valve string fin 4 again, and IEGT valve string fin 4 becomes the direct electrified body being connected with DC capacitor, and direct current energy taking device 1 is got energy from here.This method has greatly shortened energy taking device and has got energy path, has safe and reliable advantage.
Secondly, be arranged in around direct current energy taking device by electric control unit direct voltage sampling plate and IEGT drive plate 2 etc., can shorten like this length of connection cable as far as possible, reduce issuable interference.
Finally, direct current energy taking device is with particulate metal material package, and is equipped with specific filter, to shield the electromagnetic interference from module itself and surrounding.
2. electrical characteristic
Due to the requirement of application, the excursion of the direct voltage of the power model based on 4500V-IEGT when actual motion is 0～3500Vdc, higher, so, when application direct current is got energy technology, do detailed analysis to electric factor.
Start/stop: when whole set equipment networks and shut down; direct current is got and can will be experienced the handoff procedure of closing and starting by equipment; the capacitance voltage span of DC side is also very large; so; valve section (certain quantity power model is in series) can all be pressed charging; steadily start and stop of energy taking device are vital.
Operation: complete machine is in running, and DC capacitor voltage fluctuation is larger, can produce a large amount of differential mode interference, so will ask for energy equipment when bearing electromagnetic interference, it is stable that output voltage also can keep.
Energy taking device is as an important composition of IEGT power model, and its characteristic such as high pressure resistant, safe is had to very high requirement.The present invention is from topological structure, all press and innovation research is made to energy taking device, design improvement, and research and development and the application of final finishing device in several aspects such as power conversion.
1) topological structure
1. scheme: energy taking device of the present invention adopts the mode of power circuit cascade, input series connection, output is in parallel, and concrete electric connecting mode is with reference to shown in Fig. 4, Fig. 5.
Input high pressure after the equalizing capacitance of a plurality of series connection, then receive respectively the switching tube of each power circuit.As shown in Figure 4, Figure 5, at the two ends of common mode inductance, each is gone here and there by a string all pressures that are comprised of large resistance resistance shunt capacitance.Switching tube now, 1/N(when voltage stress is single switching transistor is such as 6 switching tubes of serial connection are 1/6).Heat distribution simultaneously also can be relatively average, is relatively applicable to being applied in the power environment of high input voltage.
2. parts selection: in order to reach the high voltage bearing requirement of energy taking device, every MOSFET that switch tube voltage stress is 1200V that the design chooses.
2) voltage-sharing
1. produce reason: it is to cause all pressing bad main cause that series connection MOSFET drives the inconsistent of signal, drive the difference of time of delay can cause opening on slower device and produce due to voltage spikes, and higher quiescent voltage, make each step voltage uneven.In addition, cabling stray inductance and the absorbing circuit characteristic of drive circuit are different, different MOSFET lead-in inductances is different, on state characteristic also just has very big-difference, the voltage rate of rise dV/dt of MOSFET shutdown moment is relevant with the value of Absorption Capacitance in addition, all to switching tube, conducting has considerable influence in the aspects such as factor of the large and operational environment of the error of Absorption Capacitance, therefore the dV/dt of the MOSFET of each series connection also can be different, and the MOSFET two ends that Absorption Capacitance is little can produce larger due to voltage spikes.
2. solution: for guarantee circuit in the course of the work each interstage voltage equate, first, we select same model with batch device, and want strict conformance in the design of drive circuit and absorbing circuit; Secondly, at the larger resistance resistance of every inter-stage parallel connection, play all pressures effect under static state; In addition, for the clamp circuit of dynamic employing resistance-capacitance type, guarantee to drive the amplitude of signal consistent, guarantee that a plurality of MOSFET are synchronous, the time goes up and opens in amplitude in full accord.
3) power conversion
This power supply is larger owing to being that voltage levels from input DC300V-DC3700V is transformed into the difficulty of the direct one-level of low voltage DC 15V conversion, be mainly while considering unit exception or very likely have influence on high-pressure side, former limit when the 15V low pressure of secondary breaks down during personnel's misoperation, high-pressure side is to be connected with the main power device of module, so very dangerous.For this, consider, the design has done two stage power conversion in high-pressure side, though guarantee DC15V side go wrong be also unlikely to directly to have influence on high pressure gets can side.As shown in Figure 3, Figure 4, the high voltage direct current electric energy of input " up is waken power control part " and makes power supply in running order by start-up circuit after after filtering, through one-level cascade circuit of reversed excitation, convert bus high pressure to DC400V essence electricity, after processing after filtering, proceed second level isolated variable and process.Finally by crossing full-wave rectification technology, make a high position get can power supply can stability and safety output DC15V essence electricity.
Claims (1)
- The direct current of 1.IEGT power model is got energy power supply, it is characterized in that, at space structure cloth, be set up, direct current energy taking device is between IEGT valve string and power model control board, the input of direct current energy taking device is connected with the IEGT valve string fin as direct electrified body, IEGT valve string fin is positioned at the outside of IEGT valve string, and IEGT valve string fin is connected with DC capacitor by connecting busbar; Direct voltage sampling plate and IEGT drive plate are arranged in direct current and get between energy power supply and IEGT valve string;The main circuit that direct current is got energy power supply comprises filter circuit, non-isolation anti exciting converter, isolation push-pull converter, filter circuit is comprised of common mode inductance, resistance, electric capacity, positive and negative two inputs in high voltage input terminal are respectively equipped with common mode inductance, the common mode inductance two ends that are connected to the positive and negative input of high pressure are respectively gone here and there by a string all pressures that are comprised of resistance shunt capacitance, form filter circuit; Non-isolation anti exciting converter is comprised of a plurality of power circuit cascades, the input series connection of each power circuit, and output is in parallel, and the input of the power circuit being connected in series is connected with filter circuit output; The output of non-isolation anti exciting converter is connected with the input of isolation push-pull converter;The direct current of IEGT power model is got the course of work that can power supply: the high voltage direct current electric energy of input is after filtering after circuit filtering, by start-up circuit, signal is passed to the protection of input overvoltage/undervoltage and control circuit, the protection of input overvoltage/undervoltage and control circuit make power supply in running order, electric power signal converts through the first order through non-isolation anti exciting converter, bus high pressure is converted to the signal of telecommunication of DC400V and processes after filtering, the signal of telecommunication after filtering is processed carries out second level isolated variable processing through isolation push-pull converter again, full-wave rectification finally by over commutation circuit, make a high position get can power supply can stability and safety the signal of telecommunication of output DC15V.
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| CN105991006A (en) * | 2015-02-06 | 2016-10-05 | 国家电网公司 | Capacitance pull-push linear isolation high-potential self energy taking circuit with serial connected crimping type IGBT |
| CN105991008A (en) * | 2015-02-06 | 2016-10-05 | 国家电网公司 | High-potential self energy taking system suitable for IGBT serial application mode |
| CN106130354A (en) * | 2016-08-29 | 2016-11-16 | 中天海洋***有限公司 | The high pressure DC DC changer that a kind of 10kV powers |
| CN106208717A (en) * | 2016-08-29 | 2016-12-07 | 中天海洋***有限公司 | The high pressure DC DC changer that a kind of 2kV powers |
| CN106787817A (en) * | 2016-11-08 | 2017-05-31 | 中车株洲电力机车研究所有限公司 | The submodule and modularization multi-level converter of modularization multi-level converter |
| CN107070201A (en) * | 2017-04-14 | 2017-08-18 | 中国电力科学研究院 | One kind is with line feeder fiber composite overhead ground wire HVDC conversion electric power system and method |
| CN108199586A (en) * | 2018-01-25 | 2018-06-22 | 太原理工大学 | A kind of high potential high voltage direct current draw-out power supply device |
| US10348064B2 (en) | 2017-04-28 | 2019-07-09 | Lsis Co., Ltd. | Submodule |
| CN110034665A (en) * | 2019-05-13 | 2019-07-19 | 荣信汇科电气技术有限责任公司 | Combined large capacity inlet wire brake unit structure based on compression joint type IEGT |
| WO2022152124A1 (en) * | 2021-01-13 | 2022-07-21 | 南京南瑞继保电气有限公司 | Modular batch energy acquisition and commutation circuit and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991006A (en) * | 2015-02-06 | 2016-10-05 | 国家电网公司 | Capacitance pull-push linear isolation high-potential self energy taking circuit with serial connected crimping type IGBT |
| CN105991008A (en) * | 2015-02-06 | 2016-10-05 | 国家电网公司 | High-potential self energy taking system suitable for IGBT serial application mode |
| CN106130354A (en) * | 2016-08-29 | 2016-11-16 | 中天海洋***有限公司 | The high pressure DC DC changer that a kind of 10kV powers |
| CN106208717A (en) * | 2016-08-29 | 2016-12-07 | 中天海洋***有限公司 | The high pressure DC DC changer that a kind of 2kV powers |
| CN106787817A (en) * | 2016-11-08 | 2017-05-31 | 中车株洲电力机车研究所有限公司 | The submodule and modularization multi-level converter of modularization multi-level converter |
| CN106787817B (en) * | 2016-11-08 | 2019-02-22 | 中车株洲电力机车研究所有限公司 | The submodule and modularization multi-level converter of modularization multi-level converter |
| CN107070201A (en) * | 2017-04-14 | 2017-08-18 | 中国电力科学研究院 | One kind is with line feeder fiber composite overhead ground wire HVDC conversion electric power system and method |
| US10348064B2 (en) | 2017-04-28 | 2019-07-09 | Lsis Co., Ltd. | Submodule |
| CN108199586A (en) * | 2018-01-25 | 2018-06-22 | 太原理工大学 | A kind of high potential high voltage direct current draw-out power supply device |
| CN110034665A (en) * | 2019-05-13 | 2019-07-19 | 荣信汇科电气技术有限责任公司 | Combined large capacity inlet wire brake unit structure based on compression joint type IEGT |
| CN110034665B (en) * | 2019-05-13 | 2023-12-26 | 荣信汇科电气股份有限公司 | Combined high-capacity incoming line braking unit structure based on crimping IEGT |
| WO2022152124A1 (en) * | 2021-01-13 | 2022-07-21 | 南京南瑞继保电气有限公司 | Modular batch energy acquisition and commutation circuit and control method |
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