CN104167929A - Megawatt non-harmonic invertible current transformation shore power supply device - Google Patents
Megawatt non-harmonic invertible current transformation shore power supply device Download PDFInfo
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- CN104167929A CN104167929A CN201410396755.8A CN201410396755A CN104167929A CN 104167929 A CN104167929 A CN 104167929A CN 201410396755 A CN201410396755 A CN 201410396755A CN 104167929 A CN104167929 A CN 104167929A
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Abstract
The invention discloses a megawatt non-harmonic invertible current transformation shore power supply device. The megawatt non-harmonic invertible current transformation shore power supply device comprises n dual-PWM-conversion invertible current transformation modules connected in parallel. Each dual-PWM-conversion invertible current transformation module comprises an all-controlled three-phase half-bridge AC/DC module and an all-controlled three-phase half-bridge DC/AC module, wherein the all-controlled three-phase half-bridge AC/DC module and the all-controlled three-phase half-bridge DC/AC module are connected in series. The n all-controlled three-phase half-bridge AC/DC modules of the n dual-PWM-conversion invertible current transformation modules are connected with an alternating-current power supply through input filter inductors respectively. The n all-controlled three-phase half-bridge DC/AC modules of the n dual-PWM-conversion invertible current transformation modules are connected with a grid-connected/off-grid filter module through output filter inductors respectively. A PWM converter is adopted for the grid side of the power supply device, so that bidirectional flow of energy is achieved, the grid-side high-power factor can be achieved by controlling reactive current; the multiple dual-PWM-conversion invertible current transformation modules are connected in parallel, the system capacity can reach 3MVA, and thus the problem that harmonic pollution is caused to a power grid by megawatt shore power is solved.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly MW class is without the reversible unsteady flow bank electricity of harmonic wave topological structure.
Background technology
Reversible Semiconductor Converting Technology is to realize a kind of Semiconductor Converting Technology that can stay two-way flow, and it is to be based upon modern power electronics technology, on the subjects such as modern control technology, semiconductor device.Ideal " green " the unsteady flow equipment of possibility of reversal flow device a new generation.Its appearance is based on power factor correction and eliminates converter harmonic.The power factor that can realize input current changes-1 ~+1, and can under rectification and two kinds of operating modes of inversion, realize identical power factor.Research work about this technical field mainly concentrates on to realize converter control system structure and the control program that dynamic and static index is research purpose; Take and improve the PWM modulator approach that converter system Static State Index is object; The Study on topology of main circuit and for improving the mode of operation research of main switching device condition of work; The Mathematical Modeling of current transformer.
For a long time, the boats and ships that reach port adopt fuel oil subsidiary engine self-generating, and shipyard adopts variable-frequency power generation unit to ship power supply, and the problem that the high energy consumption of harbour, shipyard and high pollution are on the rise is more and more subject to the attention of each harbour country.Harbour bank electric system provides high-precision reliable power supply can to the boats and ships that reach port, and stops the running of boat diesel engine power station, reaches the object of energy-saving and emission-reduction, is the revolution progress in harbour and ship power supply field.Yet harbour bank electricity MW class Semiconductor Converting Technology is also immature, that the high-power parallel module ability of bank electricity power supply equipment of former contravariant flows to is single, power factor is low, harmonic effects is larger.
Summary of the invention
Technical problem to be solved by this invention is, for above-mentioned the deficiencies in the prior art, to provide a kind of MW class without the reversible unsteady flow bank electricity of harmonic wave electric supply installation.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of MW class, without the reversible unsteady flow bank electricity of harmonic wave electric supply installation, comprises n two PWM conversion possibility of reversal flow modules in parallel; Described pair of PWM conversion possibility of reversal flow module comprises full control three-phase half-bridge AC/DC module and full control three-phase half-bridge DC/AC module, and described full control three-phase half-bridge AC/DC module is connected with described full control three-phase half-bridge DC/AC module; N full control three-phase half-bridge AC/DC module of described n two PWM conversion possibility of reversal flow modules is respectively by input filter inductance incoming transport power supply; N full control three-phase half-bridge DC/AC module of the two PWM conversion of described n possibility of reversal flow modules respectively by output inductor with also/from net filtration module, be connected.
Also described/from net filtration module, to comprise many groups filter in parallel, every group of filter comprises 16 filters in parallel; Described filter comprises electronic switch and the electric capacity of connecting with described electronic switch.
Compared with prior art, the beneficial effect that the present invention has is: net side of the present invention adopts pwm converter, has realized energy in bidirectional flow, can realize net side High Power Factor by controlling reactive current; A plurality of pairs of PWM conversion possibility of reversal flow modules are in parallel, and power system capacity can reach 3MVA, has solved the problem of MW class bank electricity to harmonic pollution in electric power net; Adopt also compound/from net filter module, can meet and from two kinds of application demands of net, reduce reactive loss, effectively eliminate high-frequency harmonic, avoid causing system oscillation simultaneously.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention topology diagram;
Fig. 2 is the two PWM conversion of one embodiment of the invention possibility of reversal flow module schematic diagram.
Embodiment
As shown in Figure 1, one embodiment of the invention comprises n two PWM conversion possibility of reversal flow modules in parallel; Described pair of PWM conversion possibility of reversal flow module comprises full control three-phase half-bridge AC/DC module and full control three-phase half-bridge DC/AC module, and described full control three-phase half-bridge AC/DC module is connected with described full control three-phase half-bridge DC/AC module; N full control three-phase half-bridge AC/DC module of described n two PWM conversion possibility of reversal flow modules is respectively by input filter inductance incoming transport power supply; N full control three-phase half-bridge DC/AC module of the two PWM conversion of described n possibility of reversal flow modules respectively by output inductor with also/from net filtration module, be connected; Also described/from net filtration module, to comprise many groups filter in parallel, every group of filter comprises 16 filters in parallel; Described filter comprises electronic switch and the electric capacity of connecting with described electronic switch, and n is greater than zero integer.
Two PWM conversion possibility of reversal flow modules be take by 12 2 three-phase half-bridge electric power electronic modules that IGBT switch is main body and are formed.2 PWM modules all adopt respectively the topological structure of three-phase half-bridge, can realize Bidirectional variable-flow function.Single couple of PWM conversion possibility of reversal flow module power is 500kW, and combination of the present invention adopts 6 according to actual demand, reaches the capacity of 3MW, and maximum can 8 in parallel.
And/from net filtration module, at three-phase outlet side, be connected 3 groups of parallel filters with net side, form compound net side filter with output inductor.
Converter system power from grid side input civil power 380V/50Hz to electricity consumption 450V/60Hz such as output boats and ships is all more than MW class, two PWM conversion possibility of reversal flow module civil power sides adopt three-phase voltage source full-controlled rectifier device to carry out rectification, entirely control inverter carry out inversion by three-phase voltage source.Whole possibility of reversal streaming system is realized two PWM and is controlled.
Fig. 2 is the topological diagram of two PWM possibility of reversal flow modules, and its AC/DC and DC/AC circuit all adopt common three-phase voltage type structure, and its major advantage is: be different from current source converter, voltage-type current transformer has response speed faster.The conversion of system is also mainly the transmission conversion of energy, and the effect of boosting is played in the reactance of grid side, and the present invention does not adopt isolating transformer, and the normal job requirement of converter can lifting voltage.Active rectifier adopts full control device, be different from the AC/DC converter that tradition adopts uncontrollable full-bridge diode, because electric current has two-way flow in its main circuit, this has just determined that 2 active rectifiers in module can work in different states, has realized the controlled four-quadrant unsteady flow of AC and DC side.
Claims (6)
1. MW class, without the reversible unsteady flow bank electricity of a harmonic wave electric supply installation, is characterized in that, comprises n two PWM conversion possibility of reversal flow modules in parallel; Described pair of PWM conversion possibility of reversal flow module comprises full control three-phase half-bridge AC/DC module and full control three-phase half-bridge DC/AC module, and described full control three-phase half-bridge AC/DC module is connected with described full control three-phase half-bridge DC/AC module; N full control three-phase half-bridge AC/DC module of described n two PWM conversion possibility of reversal flow modules is respectively by input filter inductance incoming transport power supply; N full control three-phase half-bridge DC/AC module of the two PWM conversion of described n possibility of reversal flow modules respectively by output inductor with also/from net filtration module, be connected.
2. MW class according to claim 1, without the reversible unsteady flow bank electricity of harmonic wave electric supply installation, is characterized in that, n≤8, and n is greater than zero integer.
3. MW class according to claim 2, without the reversible unsteady flow bank electricity of harmonic wave electric supply installation, is characterized in that n=6.
According to the MW class one of claim 1～3 Suo Shu without the reversible unsteady flow bank of harmonic wave electricity electric supply installation, it is characterized in that, also described/from net filtration module, to comprise many groups filters in parallel, every group of filter comprises 16 filters in parallel; Described filter comprises electronic switch and the electric capacity of connecting with described electronic switch.
5. MW class according to claim 4, without the reversible unsteady flow bank electricity of harmonic wave electric supply installation, is characterized in that, also described/from net filtration module, to comprise 3 groups of filters.
6. MW class according to claim 5, without the reversible unsteady flow bank electricity of harmonic wave electric supply installation, is characterized in that, described pair of PWM conversion possibility of reversal flow module power is 500kW.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410396755.8A CN104167929A (en) | 2014-08-13 | 2014-08-13 | Megawatt non-harmonic invertible current transformation shore power supply device |
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| CN201410396755.8A CN104167929A (en) | 2014-08-13 | 2014-08-13 | Megawatt non-harmonic invertible current transformation shore power supply device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207499A (en) * | 2015-09-16 | 2015-12-30 | 上海交通大学 | Transformer-free three-phase DC-AC convertor for direct-current micro grid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1808874A (en) * | 2004-12-17 | 2006-07-26 | 三垦电气株式会社 | Three-phase ac-to-dc-to-ac converter |
| CN103337946A (en) * | 2013-07-10 | 2013-10-02 | 温州大学 | Megawatt on/off-network converter composite filter |
| CN204168151U (en) * | 2014-08-13 | 2015-02-18 | 温州大学 | A kind of MW class is without harmonic wave reversible unsteady flow bank electricity electric supply installation |
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2014
- 2014-08-13 CN CN201410396755.8A patent/CN104167929A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808874A (en) * | 2004-12-17 | 2006-07-26 | 三垦电气株式会社 | Three-phase ac-to-dc-to-ac converter |
| CN103337946A (en) * | 2013-07-10 | 2013-10-02 | 温州大学 | Megawatt on/off-network converter composite filter |
| CN204168151U (en) * | 2014-08-13 | 2015-02-18 | 温州大学 | A kind of MW class is without harmonic wave reversible unsteady flow bank electricity electric supply installation |
Non-Patent Citations (1)
| Title |
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| 郜克存: ""海港岸电兆瓦级变流核心技术及应用"", 《中国博士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207499A (en) * | 2015-09-16 | 2015-12-30 | 上海交通大学 | Transformer-free three-phase DC-AC convertor for direct-current micro grid |
| CN105207499B (en) * | 2015-09-16 | 2018-05-04 | 上海交通大学 | A kind of transformerless three-phase DC-AC converters of direct-current micro-grid |
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