CN102946102B - Working method of variable-current power transmission system of tidal current generator unit - Google Patents
Working method of variable-current power transmission system of tidal current generator unit Download PDFInfo
- Publication number
- CN102946102B CN102946102B CN201210510194.0A CN201210510194A CN102946102B CN 102946102 B CN102946102 B CN 102946102B CN 201210510194 A CN201210510194 A CN 201210510194A CN 102946102 B CN102946102 B CN 102946102B
- Authority
- CN
- China
- Prior art keywords
- phase fully
- controlled
- energy
- inverter
- controlled rectifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a variable-current power transmission system of a tidal current generator unit, and a working method thereof; the variable-current power transmission system comprises a plurality of water-turbine generator sets which are respectively and sequentially connected with a corresponding electric reactor and a three-phase full-controlled rectifier; an output end of each three-phase full-controlled rectifier is respectively connected with a storage battery and a three-phase full-controlled inverter; a back-to-back structure is formed by each three-phase full-controlled rectifier and each three-phase full-controlled inverter; and an output end of each three-phase full-controlled inverter is connected with an electrical load by an inductance filter and an alternating-current transformer. The three-phase controlled rectifier adopts a three-phase full-controlled space vector pulse width modulation (SVPWM) rectifier, and the invention has the advantages of reducing the number of devices on a carrier platform, simplifying the system and reducing the consumption.
Description
Technical field
The present invention relates to marine power generation technical field, relate in particular to a kind of tidal power generating unit unsteady flow transmission system and method for work.
Background technology
The offshore generating system of prior art, as adopting every generator conventionally, offshore wind farm through ac-dc-ac transform technology, electric energy is become to the alternating current of voltage levels, then carry out electric power conveying, electric equipment quantity is many, in addition the load of marine carrier platform large, cause platform scale large, increased whole system complexity and system building cost.Existing tidal power generating system adopts generator output directly by submarine cable mode of movement more, and output voltage is low, and transmission line loss is large.And existing tidal power generating system is generally one-of-a-kind system, 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.
Summary of the invention
Object of the present invention is exactly in order to solve the problem that many, the system complex of number of devices on the above-mentioned converter system carrier that prior art exists, transmission line loss are serious, be not suitable with the conveying of multiple generator group electric power; A kind of tidal power generating unit unsteady flow transmission system and method for work are provided; There is number of devices on the carrier platform of minimizing, simplification system, reduce loss.
To achieve these goals, the present invention adopts following technical scheme:
A kind of tidal power generating unit unsteady flow transmission system, it comprises some hydraulic generator units, every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; Three-phase fully-controlled rectifier output end is connected with storage battery and three-phase fully-controlled inverter respectively, three-phase fully-controlled rectifier and three-phase fully-controlled inverter composition back to back structure; 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 again inverter mode, 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; Realize the corresponding three-phase fully-controlled rectifier of the concrete access of storage battery by closure isolating switch separately.
Described three-phase fully-controlled rectifier is connected with cable connection box on the bank by seabed direct current cables, and described transfer box is connected with 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 transfer box degree of protection is IP65.
Described hydraulic generator unit is two or many hydraulic generator units.
The method of work that adopts above-mentioned a kind of tidal power generating unit unsteady flow transmission system, is divided into following several job steps:
Step 1, system starts:
Judge by trend tachymeter whether tidal current speed reaches requirement,
In the time that tidal current speed reaches requirement condition, generator is in preparing starting state;
When tidal current speed is during lower than requirement condition, generator is in stopped status;
Step 2, electric energy conversion: hydraulic generator is transformed into electric energy by marine tidal-current energy by the hydraulic turbine and generator, by reactor and the rectification of three-phase fully-controlled type separately, the three-phase fully-controlled type rectifier of described back to back structure together with reactor by voltage, frequency all unsettled AC energy be transformed into the direct current energy of voltage stabilization;
Step 3, electric energy output: the direct current of each output is connected in parallel, by direct current submarine cable, direct current energy is transported on the bank, the three-phase fully-controlled type inverter of described back to back structure converts direct current energy to the AC energy of frequency stabilization, after filtering device and isolating transformer again; Inductance filter filtering high order harmonic component; Eliminate the alternating current of high order harmonic component by isolating transformer, for final power load is powered.
, because output is directly connected with user, so the state variation of load is larger, may there are two kinds of situations in described step 3:
Situation one: the electric energy sending exceedes the electric energy of consumption;
Situation two: the electric energy sending consumes the situation of use not;
For situation one, three-phase fully-controlled type rectifier, by adjusting hydraulic generator unit operation curve, reduces the absorbed power of the hydraulic turbine, to adapt to the situation of underloading;
For situation two, three-phase fully-controlled type inverter can reduce output voltage, and whole system is with maximum ability work.
Beneficial effect of the present invention:
1. this invention can be according to the operation characteristic of some hydraulic generator units of flow dynamic characteristic independent regulation, makes the generating efficiency of two water wheels tidal power generating systems higher.
2. two hydraulic generators of this invention share a DC-to-AC converter, reduce system equipment quantity, reduce investment.
3. effectively solve converter system 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 platform scale, reduce investment, improved the economic benefit of electricity generation system.
6. adopt higher direct current transportation, effectively reduce the loss on transmission line, can meet the power delivery requirement of middle power flow electricity generation system.
7. for the tidal power generating unit of many shared carrier platforms, adopt a submarine cable transmission of electricity, reduced number of cables, direct current transportation cable only has two cores, reduces compared with the core number of ac cable, has saved copper material and insulating material etc.
Brief description of the drawings
Fig. 1 is circuit catenation principle figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Tidal power generating unit unsteady flow transmission system, 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 being 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 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 the inductance filter, the AC transformer that are connected.Described three-phase fully-controlled SVPWM rectifier, three-phase fully-controlled SVPWM inverter adopts SVPWM Semiconductor Converting Technology can realize the two-way transmission of energy, can be operated in rectification state and can be operated in again inverter mode, and the power factor of electricity consumption side is adjustable.
Every hydraulic generator reactor of configuration of the present invention and a three-phase fully-controlled SVPWM rectifier, the rectification of boosting, output direct current, be incorporated to DC bus, then transmits electricity by direct current cables.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 consideration 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.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 producing in elimination system reduces the pollution with electrical network.Select 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 invention and power load, be connected by three full-control type SVPWM current transformers.Every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; Three-phase fully-controlled rectifier output end is connected with storage battery and three-phase fully-controlled inverter respectively, three-phase fully-controlled rectifier and three-phase fully-controlled inverter composition back to back structure; Three-phase fully-controlled inverter output end is connected with power load through inductance filter, AC transformer.
The unsettled electric energy of 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 generator side converter, by the decoupling zero control of current transformer, realizes generator reactive power and electromagnetic torque independent regulation.With respect to the uncontrollable rectifier system of traditional diode, this decoupling zero control effectively solves input current abnormality problem, 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.To connect generating set and power load by full-control type current transformer equally in electricity consumption side, also reduced the harmonic pollution of marine tidal-current energy generator group to electrical network, simultaneously by decoupling zero control, conveniently adjust the reactive power that 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 in the time that 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 marine tidal-current energy generator group and realize low voltage crossing.
By reference to the accompanying drawings the embodiment of invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection scope of the present invention.
Claims (1)
1. a method of work for tidal power generating unit unsteady flow transmission system, described system comprises some hydraulic generator units, every hydraulic generator unit is connected successively with corresponding reactor, three-phase fully-controlled rectifier; Three-phase fully-controlled rectifier output end is connected with storage battery and three-phase fully-controlled inverter respectively, three-phase fully-controlled rectifier and three-phase fully-controlled inverter composition back to back structure; Three-phase fully-controlled inverter output end is connected with power load through inductance filter, isolating transformer; Described three-phase fully-controlled inverter, three-phase fully-controlled rectifier adopt SVPWM Semiconductor Converting Technology to realize the two-way transmission of energy, can be operated in rectification state and can be operated in again inverter mode, and the power factor of power load side is to regulate; It is characterized in that, described method is divided into following several job steps:
Step 1, system starts:
Judge whether tidal current speed reaches requirement,
In the time that tidal current speed reaches requirement condition, generator is in preparing starting state;
When tidal current speed is during lower than requirement condition, generator is in stopped status;
Step 2, electric energy conversion: hydraulic generator unit is transformed into electric energy by marine tidal-current energy by the hydraulic turbine and generator, by reactor and three-phase fully-controlled rectifier separately, the three-phase fully-controlled rectifier of described back to back structure together with reactor by voltage, frequency all unsettled AC energy be transformed into the direct current energy of voltage stabilization;
Step 3, electric energy output: the direct current of each the corresponding output of hydraulic generator unit is connected in parallel, by direct current submarine cable, direct current energy is transported on the bank, the three-phase fully-controlled inverter of described back to back structure converts direct current energy to the AC energy of frequency stabilization again, through inductance filter and isolating transformer; Inductance filter filtering high order harmonic component; Eliminate the alternating current of high order harmonic component by isolating transformer, for final power load is powered;
, because output is directly connected with user, so the state variation of load is larger, may there are two kinds of situations in described step 3:
Situation one: the electric energy sending exceedes the electric energy of consumption;
Situation two: the electric energy sending consumes the situation of use not;
For situation one, three-phase fully-controlled rectifier, by adjusting hydraulic generator unit operation curve, reduces the absorbed power of the hydraulic turbine, to adapt to the situation of underloading;
For situation two, three-phase fully-controlled inverter can reduce output voltage, and whole system is with maximum ability work.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210510194.0A CN102946102B (en) | 2012-12-03 | 2012-12-03 | Working method of variable-current power transmission system of tidal current generator unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210510194.0A CN102946102B (en) | 2012-12-03 | 2012-12-03 | Working method of variable-current power transmission system of tidal current generator unit |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102946102A CN102946102A (en) | 2013-02-27 |
CN102946102B true CN102946102B (en) | 2014-10-29 |
Family
ID=47729021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201210510194.0A Active CN102946102B (en) | 2012-12-03 | 2012-12-03 | Working method of variable-current power transmission system of tidal current generator unit |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102946102B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105840396A (en) * | 2016-05-25 | 2016-08-10 | 赣州黄金沃特发电设备有限公司 | Inverter type water turbine generator set |
CN106356891A (en) * | 2016-10-14 | 2017-01-25 | 江门市安利电源工程有限公司 | Asynchronous power generating device and working method thereof |
CN116961118A (en) * | 2022-04-13 | 2023-10-27 | 青岛海尔空调器有限总公司 | Tidal power generation control method and device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102182635A (en) * | 2011-05-06 | 2011-09-14 | 河海大学 | Offshore renewable energy source comprehensive power generating system |
CN202957598U (en) * | 2012-12-03 | 2013-05-29 | 山东电力工程咨询院有限公司 | Current converting and power transmitting device of power flow generating set |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU759548B2 (en) * | 1999-05-28 | 2003-04-17 | Abb Ab | A wind power plant |
-
2012
- 2012-12-03 CN CN201210510194.0A patent/CN102946102B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102182635A (en) * | 2011-05-06 | 2011-09-14 | 河海大学 | Offshore renewable energy source comprehensive power generating system |
CN202957598U (en) * | 2012-12-03 | 2013-05-29 | 山东电力工程咨询院有限公司 | Current converting and power transmitting device of power flow generating set |
Non-Patent Citations (3)
Title |
---|
1kW 潮流能发电装置逆变器SVPWM 技术的研究与应用;张少杰等;《中国可再生能源学会海洋能专业委员会第三届学术讨论会论文集》;20101231;1-4 * |
JP特表2003-501993A 2003.01.14 |
张少杰等.1kW 潮流能发电装置逆变器SVPWM 技术的研究与应用.《中国可再生能源学会海洋能专业委员会第三届学术讨论会论文集》.2010,1-4. |
Also Published As
Publication number | Publication date |
---|---|
CN102946102A (en) | 2013-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021082601A1 (en) | Offshore wind farm high-frequency uncontrolled rectification direct-current electric power transmission system | |
CN103904635B (en) | A kind of topological structure of multiport direct current transformer station and control method thereof | |
CN105226714A (en) | A kind of offshore wind farm direct current converges transmission system and method for designing | |
CN108599272B (en) | Ship comprehensive electric power system experiment platform based on multi-energy and hybrid energy storage technology | |
CN103607032B (en) | Renewable energy power generation, power transmission and transformation and electrical network access integral system | |
CN102013694A (en) | Transformerless wind power generation grid-connected topology structure based on MMC | |
CN110556864A (en) | Remote power transmission converter station and power transmission system | |
CN105932719A (en) | Cascading high-voltage large-capacity energy storage virtual synchronous machine system | |
CN101574935B (en) | Module combined power quality conditioning system for tractive power supply network | |
CN108923450B (en) | Control and operation method of current source type high-voltage direct-current transmission system | |
CN113794226A (en) | Low-frequency alternating-current power transmission system of offshore wind farm | |
CN105391079A (en) | Power transfer type balanced power supply system and method based on new energy interconnection | |
CN203589824U (en) | Renewable energy power generation, power transmission and transformation and power grid access integration system | |
CN102946102B (en) | Working method of variable-current power transmission system of tidal current generator unit | |
CN103311951B (en) | Wind power plant power transmission method based on voltage transformation of middle frequency or high frequency transformer | |
CN103501117A (en) | Power transformation transmission system suitable for wave power generator unit | |
CN205123278U (en) | Marine wind power direct current assembles power transmission system | |
CN204858593U (en) | Mix wind generator system based on direct current transmission circuit | |
CN202957598U (en) | Current converting and power transmitting device of power flow generating set | |
CN206099785U (en) | Electric Railway traction substation auxiliary power supply hands over directly friendship type power supply system structure | |
CN210693470U (en) | Converter station and power transmission system | |
CN204361682U (en) | The full direct current energy collecting system of a kind of wind energy turbine set | |
CN203522550U (en) | Power transformation transmission system suitable for wave power generator unit | |
CN206948200U (en) | A kind of GIS voltage transformers verifying power supply | |
CN110932316A (en) | Offshore wind power and wave combined generator set |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right |
Effective date of registration: 20211231 Address after: 250014 Shandong Province, Lixia District of Ji'nan city Min Zi Qian Road No. 106 Patentee after: Shandong Electric Power Engineering Consulting Institute Corp.,Ltd. Address before: 250014 Shandong Province, Lixia District of Ji'nan city Min Zi Qian Road No. 106 Patentee before: Shandong Electric Power Engineering Consulting Institute Corp.,Ltd. Patentee before: Harbin ruiha Technology Development Co., Ltd |
|
TR01 | Transfer of patent right |