CN201708701U - Power assembly of back-to-back type three-level static frequency converter - Google Patents
Power assembly of back-to-back type three-level static frequency converter Download PDFInfo
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- CN201708701U CN201708701U CN2010202496456U CN201020249645U CN201708701U CN 201708701 U CN201708701 U CN 201708701U CN 2010202496456 U CN2010202496456 U CN 2010202496456U CN 201020249645 U CN201020249645 U CN 201020249645U CN 201708701 U CN201708701 U CN 201708701U
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Abstract
The utility model provides a power assembly of a back-to-back type three-level static frequency converter, which is characterized by comprising the water cooling radiators of two power assemblies which are connected mutually, wherein an IGBT module and a diode module are respectively installed at the two sides of the water cooling radiator of one power assembly, meanwhile, two IGBT modules are respectively arranged at the two sides of the water cooling radiator of the other power assembly positively and negatively, four IGBT modules are sequentially connected between a DC positive pole and a DC negative pole in series to form two bridge arms, an input/output end is led out from the middle of the two IGBT modules which are positioned in the middle, one diode module is respectively in bridge joint between the midpoint and the zero point of each bridge arm, and an absorption capacitance is respectively in bridge joint between the DC positive pole and the DC negative pole and the zero point. The utility model has the advantages of compact structure, high-standard interchangeability, the water cooling radiator with excellent heat dissipation effect, increased heat dissipation effect and independent cooling system.
Description
Technical field
The utility model relates to a kind of (PCC) power of three level static frequency converters.
Background technology
Static frequency convertor is a kind of starting device of reliable, function admirable.Its proposition has the time of decades, has entered the widespread usage stage abroad, runs on aspects such as gas turbine unit, hydroenergy storage station, blast furnace blower.One cover starting device can start some large-scale units successively, saves equipment investment.On the other hand, static frequency-conversion starting device cost is higher, system complex, technical merit of having relatively high expectations and maintenance levels.Yet along with the development of power electronic technology, these problems are resolved day by day.
Compare with two common level PWM frequency converters, three level static frequency converters are because the output line voltage level number is increased to 3 by 2, each level magnitude is relatively low, is reduced to half DC bus-bar voltage by whole DC bus-bar voltage, the also corresponding decline of output dv/dt; Under the prerequisite of equal switching frequency, adopt three level structures that the output waveform quality is had greatly improved.Also adopt the three-level pwm rectifier structure of symmetry as input, can accomplish that input power factor is adjustable, input harmonics is lower, and can four quadrant running, and system has higher dynamic property.
Nowadays, Inverter Application is increasing day by day, and is more and more higher to the requirement of frequency converter reliability.The reliability index that influences frequency converter has multinomial, and wherein its heat radiation is a vital link with ventilation in design process.In general, because plant capacity is big, when operate as normal, still to produce a large amount of heats.For guaranteeing the operate as normal of equipment, a large amount of heats is distributed, optimize heat radiation and ventilation scheme, realize the high efficiency and heat radiation of equipment, be very necessary for the reliability that improves equipment.
Frequency converter is when operate as normal, and (PCC) power then is the main source of heat, wherein becomes the most important accordingly as the heat radiation of the power device of main circuit electronic switch, the heat dissipation design of (PCC) power.The temperature rise that dissipation power produced of power device needs to be reduced by radiator, increase heat conduction and swept area, expansion hot-fluid and the buffering heat conduction transient process of power device by radiator, directly conduction or by means of heat-conducting medium with heat transferred in coolant.The type of cooling that arrives commonly used is pressure air cooling, recirculated water cooling, heat-pipe radiator cooling in high voltage converter at present.The water-cooling pattern heat radiation has that volume is little, efficient is high, advantage such as pollutions not owing to adopt, and the temperature difference of spreader surface and fluid is smaller, and one side can improve power, can reduce the temperature of chip on the other hand, improves its life-span.Therefore, adopting water-cooling pattern that frequency converter is cooled off, is important measures that improve equipment dependability and reduction equipment volume.
During the (PCC) power of design three-level converter, when satisfying heat dissipation design, should fully take into account equipment loading and unloading, maintenance and maintenance make things convenient for problem.But also there is not a kind of (PCC) power that can meet the demands so far.
Summary of the invention
The purpose of this utility model provides a kind of (PCC) power of formula three level static frequency converters back-to-back that is applicable to.
In order to achieve the above object, the technical solution of the utility model has provided a kind of (PCC) power of the three level static frequency converters of formula back-to-back, it is characterized in that, comprise two (PCC) power water-filled radiators that are connected, the (PCC) power water-filled radiator is located on the (PCC) power supporting bracket by the water-filled radiator support column, the two ends of each (PCC) power water-filled radiator are directly connected in the water inlet pipe and the return pipe of major cycle waterpipe respectively by the water-filled radiator connector, an IGBT module and a diode (led) module respectively are installed on the two sides of a (PCC) power water-filled radiator, simultaneously, positive and negatively on the two sides of another (PCC) power water-filled radiator be provided with two IGBT modules, four IGBT modules are connected on successively forms two brachium pontis between direct-flow positive pole and the direct current negative pole, between two IGBT modules, lead to the I/O end in the centre, cross-over connection has a diode (led) module respectively between the mid point of each brachium pontis and 0, and cross-over connection has one to absorb electric capacity respectively between direct-flow positive pole and direct current negative pole and 0.
The utility model has the advantages that:
1. compact conformation adopts " back-to-back " formula to install.(PCC) power adopts power device two sides on the (PCC) power water-filled radiator to install, promptly " back-to-back " formula is installed, this compact structure, make (PCC) power satisfy its heat radiation requirement, reach under the prerequisite of radiating effect, saved the space of half than the scheme of using two single faces that radiator is installed.Therefore, the compactness of structure makes dwindling of (PCC) power volume, thereby can reduce the size of complete machine greatly.
2. unified (PCC) power structure.Three-level converter rectifying part and three-level converter inversion part can be designed to identical two parts, and in three-level converter rectifying part and the three-level converter inversion part each can be designed to totally six identical (PCC) powers mutually.Therefore, the design unification of (PCC) power is installed on power device on the two sides of (PCC) power water-filled radiator, water-filled radiator support column by insulation is fixed on the (PCC) power supporting bracket again, form the integral body of a (PCC) power, it is integrated that (PCC) power is formed, convenient for assembly, the maintenance with the maintenance, make the three-level converter rectifying part partly use identical (PCC) power with the three-level converter inversion.
3. high-level interchangeability.The (PCC) power circuit is simple, clear in structure, and technology maturation is reliable.In addition, adopt modular construction, the (PCC) power of three-level converter rectifying part and three-level converter inversion part, because the structure of its unified standard, so can exchange under situation about not making any change, simultaneously, assembling and maintenance are also very convenient.
4. the water-filled radiator of good radiating effect.(PCC) power adopts the (PCC) power water-filled radiator that power device is cooled off, the IGBT module and the diode (led) module that are installed on (PCC) power water-filled radiator surface are fully cooled, the temperature rise of strict power controlling device is no more than rated value, to satisfy device operate as normal in specified temperature range, can effectively improve equipment dependability.
5. the radiating effect of Zeng Qianging.(PCC) power water-filled radiator inside is formed by three water channels of S type, in three water channels of (PCC) power water-filled radiator inside, add the spring identical respectively with water channel length, can effectively increase flow resistance by the recirculated water of water channel, strengthen the flow-disturbing effect of the current in the water channel, thereby increase the heat exchange coefficient of (PCC) power water-filled radiator, the radiating effect of enhancing rate assembly water-filled radiator.
6. cooling system independently.Each (PCC) power has its (PCC) power water-filled radiator that independently uses, make it that heat radiation power that is fit to separately is provided, simultaneously, for making IGBT module and diode (led) module on the (PCC) power water-filled radiator reach better radiating effect, consider its radiating effect and heat radiation requirement, each (PCC) power uses two identical and relatively independent (PCC) power water-filled radiators to be connected heat radiation is installed, be directly connected in the water inlet pipe and the return pipe of major cycle waterpipe at the two ends of each (PCC) power water-filled radiator by the water-filled radiator connector respectively, strengthen the radiating effect of each (PCC) power water-filled radiator.
Description of drawings
But Fig. 1 is two SVPWM three-level converter schematic diagrams of energy two-way flow;
Fig. 2 is the (PCC) power schematic diagram of formula three level static frequency converters back-to-back;
Fig. 3 is the (PCC) power structural perspective of formula three level static frequency converters back-to-back;
Fig. 4 is a (PCC) power water-filled radiator stereogram.
Embodiment
Specify the utility model below in conjunction with embodiment.
Embodiment
As shown in Figure 1, but be two SVPWM three-level converter schematic diagrams of energy two-way flow, this mode allows the feedback of whole motor power, has reduced input harmonics and has improved power factor.Diode clamping tri-level voltage-source type height-high frequency converter has been considered three-level voltage source type height-high frequency converter operate power factor height, and response speed is fast, and number of devices is few, and the cabinet size reduces, the unit operation high reliability features.Three-level voltage source type frequency converter directly adopts the voltage-source type high-voltage inverter of high pressure IGBT power device, and it has adopted traditional friendship-straight-ac frequency converter structure, but is two SVPWM three-level converters of energy two-way flow.According to its schematic diagram, three-level converter rectifying part 1 can be designed to identical two parts with three-level converter inversion part 2, and in three-level converter rectifying part 1 and the three-level converter inversion part 2 each can be designed to totally six identical (PCC) powers mutually.
As shown in Figure 2, it is schematic diagram of the present utility model, because it is six identical (PCC) powers that three-level converter rectifying part 1 is divided into three-level converter inversion part 2, therefore in the three-level converter rectifying part 1 in the input of (PCC) power and the three-level converter inversion part 2 output of (PCC) power be identical tie point in the universal power module, each (PCC) power have import output, 0 point, direct-flow positive pole and direct current negative pole four points of connection.In three-level converter rectifying part 1, introduce a phase of three-phase alternating current by input, pass through the brachium pontis of two IGBT modules, 3 series connection respectively, simultaneously, using diode (led) module 4 to carry out clamp respectively at 0 between the series connection mid point of IGBT module and, install additional between direct-flow positive pole and direct current negative pole and 0 and absorb electric capacity 5, is direct current with its rectification, be respectively direct-flow positive pole and direct current negative pole, enter three-level converter inversion part 2; Equally, in three-level converter inversion part 2, direct-flow positive pole and direct current negative pole ingoing power assembly by rectification, pass through the brachium pontis of two IGBT modules, 3 series connection respectively, simultaneously, using diode (led) module 4 to carry out clamp respectively at 0 between the series connection mid point of IGBT module and, install additional respectively between direct-flow positive pole and direct current negative pole and 0 and absorb electric capacity 5, is a phase of three-phase alternating current output in the output inversion.
As shown in Figure 3, be structural perspective of the present utility model, in order better to reach radiating effect, adopt two identical (PCC) power water-filled radiators 6 to be connected heat radiation is installed.In (PCC) power, the two sides of (PCC) power water-filled radiator 6, each installs an IGBT module 3 and a diode (led) module 4, simultaneously, with two IGBT modules, the 3 positive and negative two sides that are installed on another (PCC) power water-filled radiator 6 that is connected, absorb electric capacity 5 be installed in respectively direct-flow positive pole and direct current negative pole with 0 between, each tie point employing copper bar between inner each element of (PCC) power and between the (PCC) power is electrically connected; Be directly connected in the water inlet pipe and the return pipe of major cycle waterpipe respectively by water-filled radiator connector 7 at the two ends of each (PCC) power water-filled radiator 6; Simultaneously, the water-filled radiator support column 8 by insulation is fixed on the (PCC) power supporting bracket 9 integral body of a (PCC) power of formation.
As shown in Figure 4, it is (PCC) power water-filled radiator stereogram of the present utility model, 6 pairs of power devices of (PCC) power water-filled radiator cool off and are used for fully cooling to being installed on its surperficial IGBT module 3 and diode (led) module 4, the temperature rise of strict power controlling device is no more than rated value, to satisfy device operate as normal in specified temperature range, can effectively improve equipment dependability.And, in the S type water channel of (PCC) power water-filled radiator 6 inside, add the spring identical respectively with water channel length, can effectively increase flow resistance by the recirculated water of water channel, strengthen the flow-disturbing effect of the current in the water channel, thereby increase the heat exchange coefficient of (PCC) power water-filled radiator 6, the radiating effect of enhancing rate assembly water-filled radiator 6.Simultaneously, each (PCC) power has its (PCC) power water-filled radiator 6 that independently uses, make it that heat radiation power that is fit to separately is provided, each (PCC) power uses two identical and relatively independent (PCC) power water-filled radiators 6 to be connected heat radiation is installed, be directly connected in the water inlet pipe and the return pipe of major cycle waterpipe at the two ends of each (PCC) power water-filled radiator 6 by water-filled radiator connector 7 respectively, strengthen the radiating effect of each (PCC) power water-filled radiator 6.
Claims (1)
1. (PCC) power of formula three level static frequency converters back-to-back, it is characterized in that, comprise two the (PCC) power water-filled radiators (6) that are connected, (PCC) power water-filled radiator (6) is located on the (PCC) power supporting bracket (9) by water-filled radiator support column (8), the two ends of each (PCC) power water-filled radiator (6) are directly connected in the water inlet pipe and the return pipe of major cycle waterpipe respectively by water-filled radiator connector (7), an IGBT module (3) and a diode (led) module (4) respectively are installed on the two sides of a (PCC) power water-filled radiator (6), simultaneously, positive and negative two the IGBT modules (3) that are provided with on the two sides of another (PCC) power water-filled radiator (6), four IGBT modules (3) are connected on successively forms two brachium pontis between direct-flow positive pole and the direct current negative pole, lead to the I/O end between two IGBT modules (3) in the middle of being positioned at, cross-over connection has a diode (led) module (4) respectively between the mid point of each brachium pontis and 0, and cross-over connection has one to absorb electric capacity (5) respectively between direct-flow positive pole and direct current negative pole and 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202496456U CN201708701U (en) | 2010-06-30 | 2010-06-30 | Power assembly of back-to-back type three-level static frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202496456U CN201708701U (en) | 2010-06-30 | 2010-06-30 | Power assembly of back-to-back type three-level static frequency converter |
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| Publication Number | Publication Date |
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| CN201708701U true CN201708701U (en) | 2011-01-12 |
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| CN2010202496456U Expired - Lifetime CN201708701U (en) | 2010-06-30 | 2010-06-30 | Power assembly of back-to-back type three-level static frequency converter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066859A (en) * | 2011-10-19 | 2013-04-24 | 台达电子企业管理（上海）有限公司 | High-power high-voltage frequency inverter power unit |
| CN103138602A (en) * | 2011-11-30 | 2013-06-05 | 永济新时速电机电器有限责任公司 | Water-cooling inversion power module |
| CN103516230A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Bi-directional power flow controlled multi-level mutual balance solid state transformer and realization method thereof |
| CN105119502A (en) * | 2015-08-21 | 2015-12-02 | 北京天诚同创电气有限公司 | Current transformer rectifying device |
| CN105620706A (en) * | 2016-02-19 | 2016-06-01 | 武汉理工大学 | Ship electric propulsion system with harmonic suppressing and regenerative braking functions and control method |
| CN110488146A (en) * | 2019-04-02 | 2019-11-22 | 许继电气股份有限公司 | A kind of DC distribution net type insulation monitoring system and D.C. isolation monitoring device |
-
2010
- 2010-06-30 CN CN2010202496456U patent/CN201708701U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066859A (en) * | 2011-10-19 | 2013-04-24 | 台达电子企业管理（上海）有限公司 | High-power high-voltage frequency inverter power unit |
| US9019731B2 (en) | 2011-10-19 | 2015-04-28 | Delta Electronics (Shanghai) Co., Ltd. | High-power medium-voltage drive power cell having power elements disposed on both sides of base plate |
| TWI494048B (en) * | 2011-10-19 | 2015-07-21 | Delta Electronics Shanghai Co | High-power high-voltage inverter power unit |
| CN103138602A (en) * | 2011-11-30 | 2013-06-05 | 永济新时速电机电器有限责任公司 | Water-cooling inversion power module |
| CN103516230A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Bi-directional power flow controlled multi-level mutual balance solid state transformer and realization method thereof |
| CN103516230B (en) * | 2013-10-14 | 2016-08-10 | 国家电网公司 | Many level that bi-directional current controls balance solid-state transformer and its implementation mutually |
| CN105119502A (en) * | 2015-08-21 | 2015-12-02 | 北京天诚同创电气有限公司 | Current transformer rectifying device |
| CN105119502B (en) * | 2015-08-21 | 2017-10-10 | 北京天诚同创电气有限公司 | Current transformer rectifying device |
| CN105620706A (en) * | 2016-02-19 | 2016-06-01 | 武汉理工大学 | Ship electric propulsion system with harmonic suppressing and regenerative braking functions and control method |
| CN105620706B (en) * | 2016-02-19 | 2018-10-23 | 武汉理工大学 | Watercraft electric propulsion system with harmonics restraint and regenerative braking function and control method |
| CN110488146A (en) * | 2019-04-02 | 2019-11-22 | 许继电气股份有限公司 | A kind of DC distribution net type insulation monitoring system and D.C. isolation monitoring device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110112 |