CN202957598U - Current converting and power transmitting device of power flow generating set - Google Patents
Current converting and power transmitting device of power flow generating set Download PDFInfo
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- CN202957598U CN202957598U CN201220655759XU CN201220655759U CN202957598U CN 202957598 U CN202957598 U CN 202957598U CN 201220655759X U CN201220655759X U CN 201220655759XU CN 201220655759 U CN201220655759 U CN 201220655759U CN 202957598 U CN202957598 U CN 202957598U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model discloses a current converting and power transmitting device of a power flow generating set. The current converting and power transmitting device of the power flow generating set comprises a plurality of hydraulic generating sets, wherein every hydraulic generating set is sequentially connected with a corresponding electric reactor and a corresponding three phase full-control rectifier; an output end of the three phase full-control rectifier is respectively connected with a storage battery and a three phase full-control inverter; the three phase full-control rectifier and the three phase full-control inverter are formed into a back-to-back structure; an output end of the three phase full-control inverter is connected with an electrical load through an inductance filter and an alternating current transformer; and the three phase full-control rectifier utilizes a three phase full-control SVPWM (Space Vector Pulse Width Modulation) rectifier. The current converting and power transmitting device of the power flow generating set has the advantages that the equipment number on a carrier platform is reduced, the device is simplified, and the loss is reduced.
Description
Technical field
The utility model relates to the marine power generation technical field, relates in particular to a kind of tidal power generating unit unsteady flow power transmitting device.
Background technology
The marine power generation device of prior art, as adopting every generator usually, offshore wind farm electric energy is become to the alternating current of voltage levels through the ac-dc-ac transform technology, then carry out the electric power conveying, electric equipment quantity is many, in addition the load of marine carrier platform large, cause the platform scale large, increased whole device complexity and device construction cost.Existing tidal generating set adopts generator output directly by the submarine cable mode of movement more, and output voltage is low, and transmission line loss is large.And existing tidal generating set is generally stand-alone device, corresponding to double-generator group or multiple generator group pattern trend power station, can only carry with many submarine cables, cable cost obviously increases.For the tidal power generating unit that there is no self-startup ability, the existing rectifier system of not controlling does not have the hydraulic turbine of startup function.
The utility model content
The purpose of this utility model is exactly that on the above-mentioned convertor assembly carrier in order to solve the prior art existence, number of devices is many, device is complicated, transmission line loss is serious, is not suitable with the problem that multiple generator group electric power is carried; A kind of tidal power generating unit unsteady flow power transmitting device is provided; There is number of devices, simplification device, minimizing loss on the carrier platform of minimizing.
To achieve these goals, the utility model adopts following technical scheme:
A kind of tidal power generating unit unsteady flow power transmitting device, it comprises some hydraulic generator units, every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; The three-phase fully-controlled rectifier output end is connected with the three-phase fully-controlled inverter with storage battery respectively, and three-phase fully-controlled rectifier and three-phase fully-controlled inverter form back to back structure; The three-phase fully-controlled inverter output end is connected with power load through inductance filter, AC transformer.
Described three-phase fully-controlled type current transformer adopts the current transformer of SVPWM Semiconductor Converting Technology can realize the two-way transmission of energy, can be operated in rectification state and can be operated in inverter mode again, and the power factor of power load side is to regulate.
Described storage battery is provided with two groups, and storage battery connects with corresponding three-phase fully-controlled rectifier output end by isolating switch separately; By closure, isolating switch is separately realized the corresponding three-phase fully-controlled rectifier of the concrete access of storage battery.
Described three-phase fully-controlled rectifier is connected with cable connection box on the bank by the seabed direct current cables, and described transfer box is connected with the three-phase fully-controlled inverter by common cable; Described cable connection box is for seabed direct current cables and the transition of common cable on the bank, and the transfer box degree of protection is IP65.
Described hydraulic generator unit is two or many hydraulic generator units.
The beneficial effects of the utility model:
1. this utility model can, according to the operation characteristic of some hydraulic generator units of flow dynamic characteristic independent regulation, make the generating efficiency of two water wheels tidal generating sets higher.
2. two hydraulic generators of this utility model share a DC-to-AC converter, reduce appliance arrangement quantity, reduce investment.
3. effectively solve the convertor assembly input current abnormality, reduced the loss of permanent magnet generator, extended the life-span of generator.
4. effectively solved the starting problem of non self starting tidal power generating unit.
5. inverter, inductance filter, transformer are arranged on the bank, reduce the load of offshore platform, dwindle the platform scale, reduce cost, improved the economic benefit of Blast Furnace Top Gas Recovery Turbine Unit (TRT).
6. adopt higher direct current transportation, effectively reduce the loss on transmission line, can meet the power delivery requirement of middle power flow Blast Furnace Top Gas Recovery Turbine Unit (TRT).
7. for the tidal power generating unit of many shared carrier platforms, adopt a submarine cable transmission of electricity, reduced number of cables, the direct current transportation cable only has two cores, than the core number of ac cable, reduces, and has saved copper material and insulating material etc.
The accompanying drawing explanation
Fig. 1 is circuit catenation principle figure of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further.
Tidal power generating unit unsteady flow power transmitting device, in conjunction with Fig. 1, comprise #1 hydraulic generator unit, #2 hydraulic generator unit, respectively with #1 hydraulic generator unit, the reactor that #2 hydraulic generator unit is connected and the #1 three-phase fully-controlled SVPWM rectifier be connected with reactor respectively, #2 three-phase fully-controlled SVPWM rectifier, three-phase fully-controlled SVPWM inverter, inductance filter, AC transformer, described three-phase fully-controlled SVPWM rectifier output end is connected with three-phase fully-controlled SVPWM inverter by the seabed direct current cables, and three-phase fully-controlled SVPWM rectifier output end is connected with storage battery; Described #1 hydraulic generator unit, #2 hydraulic generator unit, reactor, #1 three-phase fully-controlled SVPWM rectifier, #2 three-phase fully-controlled SVPWM rectifier, storage battery are located on marine carrier platform, and described three-phase fully-controlled SVPWM inverter, inductance filter, AC transformer and power load are located on the bank; Three-phase fully-controlled SVPWM inverter is connected with power load by inductance filter, the AC transformer be connected.Described three-phase fully-controlled SVPWM rectifier, three-phase fully-controlled SVPWM inverter adopts the SVPWM Semiconductor Converting Technology can realize the two-way transmission of energy, can be operated in rectification state and can be operated in inverter mode again, and the power factor of electricity consumption side is adjustable.
Every hydraulic generator reactor of configuration of the utility model and a three-phase fully-controlled SVPWM rectifier, the rectification of being boosted, output direct current, be incorporated to DC bus, then by direct current cables, transmitted electricity.Consider special running environment on offshore platform, two group storage battery group cabinets are installed, and save arrangement space, and degree of protection meet the demands.Electric energy seabed direct current cables by suitable cross section after over commutation becomes direct current that two hydraulic generator units send is transported on the bank.The cross section of submarine cable is considered according to two unit maximum output, and is considered that the laying down on sea bottom environment is revised current-carrying capacity of cable.Cable connection box is set on the coast, for submarine cable and the transition of common cable on the bank.The transfer box degree of protection is IP65, meets the environmental requirement of the moist salt fog in seashore.Power delivery is ashore inputted three-phase inverter, inverse of the DC into AC, and inverter and inductance filter are used in conjunction with, and the high order harmonic component produced in cancellation element reduces the pollution with electrical network.Selected the power of inverter according to the power of two generating sets.Later alternating current is powered for power load on the bank by isolating transformer after filtering.
Between two direct-driving type tidal current generators of the present utility model and power load, by three full-control type SVPWM current transformers, be connected.Every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; The three-phase fully-controlled rectifier output end is connected with the three-phase fully-controlled inverter with storage battery respectively, and three-phase fully-controlled rectifier and three-phase fully-controlled inverter form back to back structure; The three-phase fully-controlled inverter output end is connected with power load through inductance filter, AC transformer.
The unsettled electric energy of the electric voltage frequency that generator sends, through the stable electric energy of device filtering output voltage frequency after filtering after this Structural Transformation, is powered to power load.Every generator unit stator output is connected with the generator side converter, by the decoupling zero of current transformer, controls, and realizes generator reactive power and electromagnetic torque independent regulation.With respect to the uncontrollable rectifier system of traditional diode, the input current abnormality problem that effectively solves is controlled in this decoupling zero, has greatly reduced the loss of permanent magnet generator, has extended the useful life of generator.This topological structure also possesses the characteristic of boosting of Boost circuit simultaneously, can complete rectification and two parts work of boosting.In the electricity consumption side, be to connect generating set and power load by the full-control type current transformer equally, also reduced the harmonic pollution of marine tidal-current energy generator group to electrical network, by decoupling zero, control simultaneously, conveniently adjust the reactive power that the marine tidal-current energy generator group is carried to power load, be conducive to realize the reactive power compensation of marine tidal-current energy generator group when line voltage falls when generating electricity by way of merging two or more grid systems.This back-to-back topological structure can effectively complete unsteady flow and the control of two marine tidal-current energy generator group AC-DC-AC, not only can realize two magneto alternator maximal efficiencies, loss minimization controller simultaneously, and this control mode can realize the rapid adjustment of power factor, be conducive to the marine tidal-current energy generator group and realize low voltage crossing.
Although above-mentioned, by reference to the accompanying drawings the embodiment of utility model is described; but be not the restriction to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection range of the present utility model.
Claims (5)
1. a tidal power generating unit unsteady flow power transmitting device, is characterized in that, it comprises some hydraulic generator units, and every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; The three-phase fully-controlled rectifier output end is connected with the three-phase fully-controlled inverter with storage battery respectively, and three-phase fully-controlled rectifier and three-phase fully-controlled inverter form back to back structure; The three-phase fully-controlled inverter output end is connected with power load through inductance filter, AC transformer.
2. a kind of tidal power generating unit unsteady flow power transmitting device as claimed in claim 1, it is characterized in that, described three-phase fully-controlled type current transformer adopts the current transformer of SVPWM Semiconductor Converting Technology can realize the two-way transmission of energy, can be operated in rectification state and can be operated in inverter mode again, the power factor of power load side is to regulate.
3. a kind of tidal power generating unit unsteady flow power transmitting device as claimed in claim 1, is characterized in that, described storage battery is provided with two groups, and storage battery connects with corresponding three-phase fully-controlled rectifier output end by isolating switch separately; By closure, isolating switch is separately realized the corresponding three-phase fully-controlled rectifier of the concrete access of storage battery.
4. a kind of tidal power generating unit unsteady flow power transmitting device as claimed in claim 1, is characterized in that, described three-phase fully-controlled rectifier is connected with cable connection box on the bank by the seabed direct current cables, and described transfer box is connected with the three-phase fully-controlled inverter by common cable; Described cable connection box is for seabed direct current cables and the transition of common cable on the bank, and the transfer box degree of protection is IP65.
5. a kind of tidal power generating unit unsteady flow power transmitting device as claimed in claim 1, is characterized in that, described hydraulic generator unit is two or many hydraulic generator units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220655759XU CN202957598U (en) | 2012-12-03 | 2012-12-03 | Current converting and power transmitting device of power flow generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220655759XU CN202957598U (en) | 2012-12-03 | 2012-12-03 | Current converting and power transmitting device of power flow generating set |
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| Publication Number | Publication Date |
|---|---|
| CN202957598U true CN202957598U (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220655759XU Expired - Fee Related CN202957598U (en) | 2012-12-03 | 2012-12-03 | Current converting and power transmitting device of power flow generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946102A (en) * | 2012-12-03 | 2013-02-27 | 山东电力工程咨询院有限公司 | Variable-current power transmission system of tidal current generator unit, and working method thereof |
-
2012
- 2012-12-03 CN CN201220655759XU patent/CN202957598U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946102A (en) * | 2012-12-03 | 2013-02-27 | 山东电力工程咨询院有限公司 | Variable-current power transmission system of tidal current generator unit, and working method thereof |
| CN102946102B (en) * | 2012-12-03 | 2014-10-29 | 山东电力工程咨询院有限公司 | Working method of variable-current power transmission system of tidal current generator unit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20151203 |
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| EXPY | Termination of patent right or utility model |