CN202405799U - Independent wind-power grid system based on direct current bus - Google Patents
Independent wind-power grid system based on direct current bus Download PDFInfo
- Publication number
- CN202405799U CN202405799U CN2011205587023U CN201120558702U CN202405799U CN 202405799 U CN202405799 U CN 202405799U CN 2011205587023 U CN2011205587023 U CN 2011205587023U CN 201120558702 U CN201120558702 U CN 201120558702U CN 202405799 U CN202405799 U CN 202405799U
- Authority
- CN
- China
- Prior art keywords
- bus
- wind
- direct current
- power supply
- grid system
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model relates to an independent wind-power grid system based on a direct current bus, which comprises a wind generating set and an alternating current direct current (ACDC) switch power supply group, a group of frequency changers and a high-voltage inverter, an energy storage device and a controlling subsystem, wherein the ACDC switch power supply group is used for converting alternating current generated by the wind generating set to direct current and outputting the direct current to the direct current bus; current input ends of the frequency changers and the high-voltage inverter are respectively connected with the direct current; the energy storage device is connected with the direct current bus through a bi-directional direct current direct current (DCDC) switch power supply and is connected with a low-voltage inverter; and the controlling subsystem which is used for controlling the voltage stability of the direct current bus and the balance of input power and output power of grids. The system can supply a load with electricity by building the stable direct current bus and guarantees the power supply stability of a load system, reduces the inverting links and improves wind power utilization rate simultaneously, and the ACDC switch power supply and the bi-directional DCDC switch power supply can operate independently and a plurality of power supplies can also operate simultaneously through connection with grids, the connection with grids can be achieved easily and the system has strong expandability.
Description
Technical field
The utility model relates to a kind of wind-powered electricity generation grid system based on dc bus.
Background technology
Existing small-size wind power-generating is mainly Distributed Application, and the technical scheme of employing mainly contains traditional storage battery scheme, ac bus and the limited scheme that is incorporated into the power networks.
(1) the traditional storage battery scheme is that wind-powered electricity generation is parallelly connected with batteries after rectification, passes through the inverter powering load again, relies on the voltage stabilizing ability proof load stable operation of storage battery self.This scheme principle is simple, implements to be easier to, and a large amount of storage batterys are arranged simultaneously, and fraction is higher.But needing a large amount of storage batterys is that voltage stabilizing provides support; And the scope of inverter input voltage is more little, and the capacity of the required configuration of storage battery is just big more, storage battery effectively utilize capacity just more little; The storage battery utilance is low more; Thereby cause the waste of resource, and the busbar voltage that storage battery is set up is high more, also just high more to the requirement of storage battery; Simultaneously, storage battery self efficient is lower, and the loss of charge and discharge process can reach 20%.In addition, the maintenance of storage battery, replacing trouble, limited service life, relatively poor to the large-scale wind power system suitability.Present small-sized wind power system adopts this scheme mostly.
(2) the ac bus scheme will exchange and be incorporated into the power networks, and is to utilize energy storage device (batteries) and convertor equipment (two-way inverter) to set up comparatively stable small-sized grid, and then incorporates wind-powered electricity generation into grid through combining inverter.This scheme electric energy output quality is higher, has stronger adaptability, and also network parameters is more but exchange, and control is comparatively complicated, and key equipment-two-way inverter price is higher relatively.The ripe two-way inverter that is adapted to large-scale application is not arranged at present as yet.
(3) the limited scheme of being incorporated into the power networks can reduce the consumption of storage battery, has electrical network to support, good stability, and fraction is high, but needs the locality that electrical network is arranged, and has networking examination problem, uses generally less; Also some schemes adopts diesel engine generator to support as electrical network, and that diesel engine pollutes is big, and operating cost is high, considers the fluctuation and the intermittence of wind-powered electricity generation, wastes higherly, and this has limited the application of this scheme.
The utility model content
The purpose of the utility model is that the deficiency that overcomes above-mentioned technology provides a kind of wind-powered electricity generation grid system based on dc bus.
The utility model is achieved in that a kind of wind-powered electricity generation grid system based on dc bus, comprises wind turbine generator, is used for converting the alternating current that wind turbine generator produces to ACDC Switching Power Supply group that direct current is passed to dc bus; One group of frequency converter that current input terminal and said dc bus are connected respectively and high-voltage inverter; With the energy storage device that said dc bus is connected through the bidirectional DC/DC Switching Power Supply, said energy storage device connects the low pressure inverter; Also comprise and be used to control the RACS that DC bus-bar voltage is stable, regulate electrical network input and output power-balance.
The described wind-powered electricity generation grid system based on dc bus of the utility model further comprises the unloading protection equipment that is used to consume the electric energy more than needed that said wind turbine generator produces.
Wherein, said protective device is made up of off-load protective resistance and step-down DCDC Switching Power Supply, and said step-down DCDC Switching Power Supply one end connects said dc bus, and the other end connects said off-load protective resistance.
More excellent, said off-load protective resistance is identical with the specified gross power of said wind turbine generator.
Further, said DC bus-bar voltage is 525V.
More excellent, described energy storage device is a batteries.
The described described control device of wind-powered electricity generation grid system based on dc bus of the utility model comprises the PLC controller, and said PLC controller is electrically connected with touch-screen.
The utility model is set up the stable DC bus through ACDC Switching Power Supply and bidirectional DC/DC Switching Power Supply and directly is electric, has guaranteed that the power supply of load system is stable; Be electric directly by dc bus simultaneously, reduced another mistake and become link, improved the wind-powered electricity generation utilance; In addition, but the operation of ACDC Switching Power Supply and bidirectional DC/DC Switching Power Supply separate unit also can many be incorporated into the power networks, and be incorporated into the power networks and realize simply, have very strong extensibility.
Description of drawings
Fig. 1 is the structural representation of a kind of wind-powered electricity generation grid system based on dc bus of providing of the utility model embodiment.
Fig. 2 is the structural representation that controller that the utility model embodiment provides is connected with the human-computer interaction device.
Among the figure: 1-wind-driven generator, 2-ACDC Switching Power Supply, 3-off-load protective resistance, 4-step-down DCDC Switching Power Supply, 5-controller, 6-bidirectional DC/DC Switching Power Supply, 7-energy storage device, 8-frequency converter, 9-high-voltage inverter, 10-low pressure inverter, 11-motor.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing.
Referring to Fig. 1; A kind of wind-powered electricity generation grid system based on dc bus; Comprise the wind turbine generator that constitutes by some wind-driven generators 1, be used for converting the alternating current that wind turbine generator produces to ACDC Switching Power Supply group that the several A CDC Switching Power Supply 2 by with the corresponding respectively setting of described wind-driven generator 1 that direct current outputs to dc bus constitutes; One group of frequency converter 8 that input and said dc bus are connected respectively and high-voltage inverter 9; With the energy storage device 7 that said dc bus is connected through bidirectional DC/DC Switching Power Supply 6, said energy storage device 7 connects low pressure inverter 10; Also comprise RACS, be used to control that DC bus-bar voltage is stable, the input and output power of adjustment electrical network.
Described one group of frequency converter 8, high-voltage inverter 9 and low pressure inverter 10 current output terminals all connect the load powering load.Wherein, described frequency converter 8 is used to connect motor 11 and gives motor 11 power supplies, and other load is by high- voltage inverter 9 and 10 power supplies of low pressure inverter.
The utility model is classified load, mainly is divided into electric machinery load and non-electric machinery load.
By frequency converter 8 power supplies, can realize electric machinery load soft start and soft stop to the electric machinery load like this, in the protection load, reduce impact system; Non-electric machinery load is by common inverter power supply, two high-voltage inverter 9 and the low pressure inverters 10 of being divided into of inverter, and high-voltage inverter 9 inputs are direct current 525V bus, low pressure inverter 10 is connected with energy storage device 7.Classification is the scale and the cost of taking into account system like this, need be configured by actual conditions.
The dc bus grid has two basic demands: promptly busbar voltage stable with the input and output power-balance.The utility model median generatrix voltage is stable to be realized through ACDC Switching Power Supply and bidirectional DC/DC Switching Power Supply, and the input and output power-balance is accomplished by described RACS control.
Said ACDC Switching Power Supply has rectification, boosts and voltage stabilizing function, and its output voltage can be according to external command from zero adjustable continuously to rated voltage, and output current can be according to external command from zero to the specified current limliting of carrying out, and can many parallel runnings.
Referring to Fig. 2; The described described RACS of wind-powered electricity generation grid system based on dc bus of the utility model comprises a cover PLC controller 5; Said PLC controller 5 is electrically connected with human-computer interaction device-touch-screen; Described PLC controller also is connected with some transducers, some decentralized control equipment, and they constitute the RACS of the utility model grid system together.
Described energy storage device 7 is a batteries.
Described bidirectional DC/DC Switching Power Supply and batteries constitute the energy storage subsystem of the described wind-powered electricity generation grid system based on dc bus of the utility model together.
The batteries effect is a peak load shifting, when wind turbine power generation abundant and load consumption not the time, the batteries storage is unnecessary; Otherwise when wind-powered electricity generation was not enough, the batteries discharge was the load electric energy supplement.
Discharging and recharging by RACS of batteries realizes through the bidirectional DC/DC Switching Power Supply; The bidirectional DC/DC Switching Power Supply has boosts and two kinds of mode of operations of step-down, can the accumulators group charge during step-down, can rise to direct current 525V from the batteries power taking and with voltage when boosting, and parallelly connected with the ACDC Switching Power Supply is electric.
Batteries charging and discharging currents size is by the input power, the state parameter of batteries of PLC controller according to monitoring; Given like calculating backs such as terminal voltage, available power, charging and discharging currents, temperature etc. and bearing powers; Thereby realize storage battery is effectively managed; Prolong its useful life, improve the utilance of storage battery.
The described wind-powered electricity generation grid system based on dc bus of the utility model further comprises the unloading protection equipment that is used to consume the electric energy more than needed that said wind turbine generator produces.
Wherein, said protective device is made up of off-load protective resistance 3 and step-down DCDC Switching Power Supply 4, and said step-down DCDC Switching Power Supply 4 one ends connect said dc bus, and the other end connects said off-load protective resistance 3.
Further, said off-load protective resistance is identical with the specified gross power of said wind turbine generator, and design is so that the electric energy that sends of full consumption wind-driven generator under special circumstances like this, the protection wind-driven generator.
The utility model is mainly accomplished by off-load protective resistance and step-down DCDC Switching Power Supply based on the safeguard measure of the wind-powered electricity generation grid system of dc bus.Step-down DCDC Switching Power Supply is the operating voltage of off-load protective resistance with its step-down from the bus power taking simultaneously, and can be by its output current of PLC controller control.When input power is enough big, load and batteries consumption still have when more than needed and consume unnecessary electric energy by the off-load protective resistance, thereby realize the input and output power-balance, guarantee the system stability reliability service.
DC bus-bar voltage described in the utility model is 525V.
Described wind turbine generator, ACDC Switching Power Supply group, off-load protective resistance, step-down DCDC Switching Power Supply, frequency converter, high-voltage inverter, low pressure inverter constitute the power sub-system of the utility model together.
The electric energy that wind-driven generator sends is through ACDC Switching Power Supply rectifying and voltage-stabilizing; Set up the dc bus of 525V; RACS realizes that through the PLC controller many typhoons power generator is incorporated into the power networks, and starts the bidirectional DC/DC Switching Power Supply simultaneously and step-down DCDC Switching Power Supply is started working.
In running, RACS detects the state of batteries in real time through detecting the input power of wind-driven generator, and distributes bearing power according to testing result, makes the input and output power-balance of system, thereby has guaranteed system stability.
The utility model network system is mainly taked the safeguard measure of following two aspects:
1, equipment and dynamical system protection mainly comprises:
Wind-driven generator outlet overvoltage protection, storage battery overvoltage protection, storage battery under-voltage protection, battery charge protection, system's overcurrent protection.
2, when wind speed is higher than the cut-out wind speed of wind-driven generator, by RACS load the excision and system ceased operations.
To sum up, the operation of the utility model system mainly comprises: the foundation of dc bus electrical network, load connection and system coordination are dynamically controlled.
One, sets up dc bus through ACDC Switching Power Supply or bidirectional DC/DC Switching Power Supply, and realize that many typhoons power generator is incorporated into the power networks;
Two, the generated output of monitoring wind-driven generator after input power satisfies load input condition, connects load;
Three, the running status of the state parameter of monitoring system input and output power, storage battery and load is carried out the online adjusting of system, guarantees the system safety reliability service.
The utility model directly is the inhomogeneity electric because wind-powered electricity generation, is set up the 525V direct current network through ACDC Switching Power Supply rectifying and voltage-stabilizing after dc bus output, reduced another mistake and become link, has improved the wind-powered electricity generation utilance; Because the stable of busbar voltage realized that by direct-current switch power supply the effect of storage battery just to the peak load shifting of wind-powered electricity generation, so the use amount of storage battery obviously reduces, makes system cost lower, has wide development space and application prospect; The utility model is incorporated into the power networks simply, and extensibility is good, the hardware realization is more or less freely, cost is low, efficient is high.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (7)
1. the wind-powered electricity generation grid system based on dc bus is characterized in that, comprises wind turbine generator, is used for converting the alternating current that wind turbine generator produces to ACDC Switching Power Supply group that direct current is passed to dc bus; One group of frequency converter that current input terminal and said dc bus are connected respectively and high-voltage inverter; With the energy storage device that said dc bus is connected through the bidirectional DC/DC Switching Power Supply, said energy storage device connects the low pressure inverter; Also comprise and be used to control the RACS that DC bus-bar voltage is stable, regulate electrical network input and output power-balance.
2. the wind-powered electricity generation grid system based on dc bus according to claim 1 is characterized in that, comprises the unloading protection equipment that is used to consume the electric energy more than needed that said wind turbine generator produces.
3. the wind-powered electricity generation grid system based on dc bus according to claim 2; It is characterized in that; Said protective device is made up of off-load protective resistance and step-down DCDC Switching Power Supply; Said step-down DCDC Switching Power Supply one end connects said dc bus, and the other end connects said off-load protective resistance.
4. the wind-powered electricity generation grid system based on dc bus according to claim 3 is characterized in that said off-load protective resistance is identical with the specified gross power of said wind turbine generator.
5. according to each described wind-powered electricity generation grid system of claim 1-4, it is characterized in that said DC bus-bar voltage is 525V based on dc bus.
6. the wind-powered electricity generation grid system based on dc bus according to claim 1 is characterized in that described energy storage device is a batteries.
7. the wind-powered electricity generation grid system based on dc bus according to claim 1 is characterized in that said RACS comprises the PLC controller, and said PLC controller is electrically connected with touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205587023U CN202405799U (en) | 2011-12-28 | 2011-12-28 | Independent wind-power grid system based on direct current bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205587023U CN202405799U (en) | 2011-12-28 | 2011-12-28 | Independent wind-power grid system based on direct current bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405799U true CN202405799U (en) | 2012-08-29 |
Family
ID=46703416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205587023U Expired - Fee Related CN202405799U (en) | 2011-12-28 | 2011-12-28 | Independent wind-power grid system based on direct current bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405799U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496961A (en) * | 2011-12-28 | 2012-06-13 | 中国水利水电科学研究院 | Direct-current-bus-based wind-solar independent power grid system |
| CN103683275A (en) * | 2012-08-30 | 2014-03-26 | 株式会社神户制钢所 | Generating system |
| CN106356969A (en) * | 2016-09-12 | 2017-01-25 | 滁州安瑞电力自动化有限公司 | Wind power generation control system |
| CN107046295A (en) * | 2017-02-05 | 2017-08-15 | 安徽康力节能电器科技有限公司 | A kind of six end HVDC transmission systems |
-
2011
- 2011-12-28 CN CN2011205587023U patent/CN202405799U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496961A (en) * | 2011-12-28 | 2012-06-13 | 中国水利水电科学研究院 | Direct-current-bus-based wind-solar independent power grid system |
| CN103683275A (en) * | 2012-08-30 | 2014-03-26 | 株式会社神户制钢所 | Generating system |
| CN103683275B (en) * | 2012-08-30 | 2018-02-16 | 株式会社神户制钢所 | Electricity generation system |
| CN106356969A (en) * | 2016-09-12 | 2017-01-25 | 滁州安瑞电力自动化有限公司 | Wind power generation control system |
| CN107046295A (en) * | 2017-02-05 | 2017-08-15 | 安徽康力节能电器科技有限公司 | A kind of six end HVDC transmission systems |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Haruni et al. | A novel operation and control strategy for a standalone hybrid renewable power system | |
| KR20110068690A (en) | Power converting device of new and renewable energy storage system | |
| CN103178553A (en) | Household hybrid power supply system | |
| CN204179989U (en) | Based on the scene oil complementary power generation system of DC bus | |
| CN202424196U (en) | Large-capacity energy storage converter formed by connecting multiple groups of inverter units in parallel | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN102496961A (en) | Direct-current-bus-based wind-solar independent power grid system | |
| CN202712876U (en) | Solar photovoltaic microgrid grid-connected power generation system | |
| CN104242790A (en) | Wind-solar hybrid power generation system | |
| CN202405799U (en) | Independent wind-power grid system based on direct current bus | |
| CN202435050U (en) | Distributed energy storage system of wind power station | |
| CN101728835A (en) | Battery power energy storing device for smoothing output power of wind power generation | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN102522814A (en) | Wind-solar hybrid distribution type generating set | |
| CN113949054A (en) | Power grid autonomous system and method | |
| Xu et al. | Energy management and control strategy for DC micro-grid in data center | |
| CN218102598U (en) | Time-sharing multiplexing peak-load-regulation frequency-modulation power station constructed based on hybrid energy storage | |
| CN202134923U (en) | Deep charging and discharging type battery energy storage paralleling device | |
| CN114223105B (en) | Standby power supply and operation method thereof | |
| CN104767468A (en) | Solar server control system and method | |
| CN205724935U (en) | A kind of grid-connected photovoltaic system with intelligent power dividing function | |
| CN204886203U (en) | Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory | |
| CN203522308U (en) | Intelligent photovoltaic distributed power generation system | |
| CN109861288B (en) | Photovoltaic hybrid energy storage power system based on CPS | |
| CN202772602U (en) | Wind power generation system possessing off-grid mode and grid-connected mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20120829 Termination date: 20141228 |
|
| EXPY | Termination of patent right or utility model |