CN202772602U - Wind power generation system possessing off-grid mode and grid-connected mode - Google Patents
Wind power generation system possessing off-grid mode and grid-connected mode Download PDFInfo
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- CN202772602U CN202772602U CN2012204797921U CN201220479792U CN202772602U CN 202772602 U CN202772602 U CN 202772602U CN 2012204797921 U CN2012204797921 U CN 2012204797921U CN 201220479792 U CN201220479792 U CN 201220479792U CN 202772602 U CN202772602 U CN 202772602U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a wind power generation system possessing an off-grid mode and a grid-connected mode. The wind power generation system includes a wind turbine generator, multiple storage batteries, a storage battery energy storage adjusting system and an unloading load. The wind turbine generator is connected with a high voltage electrical network main bus via a transformer and a switch, and the high voltage electrical network main bus is connected with user loads. The storage battery power conditioning system includes multiple charging and discharging management systems and a system main monitor. The storage batteries are correspondingly connected with the direct current terminals of the charging and discharging management systems, and the alternating current terminals are connected in parallel with a public bus, and then are connected with the high voltage electrical network main bus via a transformer and a switch to form a PCC. The charging and discharging management system includes a DSP core controller and a voltage source inverter. The unloading load is connected with the high voltage electrical network main bus via a transformer, and is communicated with the system main monitor. The wind turbine generator is connected with the storage battery power conditioning system via a switch. The wind power generation system is in the off-grid mode when the grid-connection of the electrical network is not allowed, and can guarantee the stable voltage and frequency of the PCC, supply power to the user loads and avoid the wind resource waste.
Description
Technical field
The utility model relates to wind power generation field, particularly, relates to a kind of having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks.
Background technology
At present because electrical network is admitted limited in one's ability, unit outage is abandoned the phenomenon of wind when often strong wind occurring, therefore can make the wind turbine generator increase from the function of network operation, can wind turbine generator enter from the network operation pattern when electrical network does not need electric weight like this, be nearby users load and the power supply of wind energy turbine set booster stations by batteries.
The utility model content
The purpose of this utility model is for a kind of having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks, can when not allowing to be incorporated into the power networks, electrical network enter from the net mode of operation, thereby be wind energy turbine set booster stations and nearby users load supplying, avoid abandoning the wind-resources waste that wind causes.
To achieve these goals, the utility model adopts following scheme:
Have concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks, comprising:
One or some typhoon group of motors, the output of described each wind-powered electricity generation unit is connected with the high-voltage fence main bus bar by transformer and switch, is connected with user load on the described high-voltage fence main bus bar; Some batteries and a batteries to store energy regulating system, described batteries to store energy regulating system comprises some management of charging and discharging systems and the system's transmission monitor that is connected with the management of charging and discharging system, described batteries is corresponding one by one with the management of charging and discharging system, each described batteries connects the dc terminal of corresponding management of charging and discharging system, the interchange end of each described management of charging and discharging system access in parallel one common bus, pass through again transformer, switch is connected with described high-voltage fence main bus bar, tie point forms PCC point, and described management of charging and discharging system comprises DSP core controller and the voltage source inverter that is connected with the DSP core controller; One unloaded loads, it is connected with the high-voltage fence main bus bar by transformer, and described unloaded loads is connected with system transmission monitor communication; Described wind-powered electricity generation unit is connected by switch with the batteries to store energy regulating system.
Further, also comprise an outside stand-by power supply that is connected with the high-voltage fence main bus bar by transformer, described system transmission monitor also is connected with described outside stand-by power supply communication.
Further, described management of charging and discharging system adopts the single busbar connection that is connected based on the 6-10kV ac bus emanant with the mode of connection of common bus.
Further, described system transmission monitor is connected by the described management of charging and discharging of some CAN interfaces and each system.
Further, described batteries adopts one or more in lithium titanate battery, sodium-sulphur battery, flow battery, lithium battery and the lead-acid battery.
Further, also comprise a master control system, described master control system is connected with each switch.
Further, also comprise a host computer, described host computer is connected with described system transmission monitor communication by the RS485 interface, and described host computer comprises a man-machine interface, and described man-machine interface is passed through the CAN interface and is connected with described system transmission monitor communication.
The utility model is owing to taking above technical scheme, and it has following beneficial effect:
1, because the utility model comprises at least two management of charging and discharging systems corresponding with batteries, and each management of charging and discharging system has adopted the DSP core controller, wherein preset and be equipped with the voltage that PCC is ordered, the voltage at frequency values and batteries two ends upper, lower limit, the virtual voltage that the DSP core controller is ordered according to high-voltage fence main bus bar PCC, frequency values and the voltage of presetting, frequency values compares, whether the magnitude of voltage of judging simultaneously the batteries two ends has exceeded on the default voltage, lower limit, carry out active power to control between batteries and the PCC point by voltage source inverter, the reactive power two-way exchange, therefore can control at an easy rate frequency and the voltage that PCC order keeps stablizing, thereby improved the output quality of electric energy, but also be applicable to form independent electric power supply with the megawatt-level wind unit.
2, because each batteries of the present utility model can directly be inserted the dc terminal of corresponding management of charging and discharging system, and on each management of charging and discharging system access in parallel one common bus, therefore can reduce the rated capacity of each management of charging and discharging system, be convenient to realize.
3, management of charging and discharging of the present utility model system adopts the single busbar connection that is connected based on the 6-10kV ac bus emanant with the mode of connection of common bus, each several part is all by common bus access in parallel high-voltage fence main bus bar, therefore can realize modularization, be convenient to System Expansion, be easy to centralized management.
4, because the kind of batteries of the present utility model can adopt any one or more in lithium titanate battery, sodium-sulphur battery, flow battery, lithium battery and the lead-acid battery, therefore be easy to realize.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is of the present utility model having concurrently from the structural representation of the wind generator system of net, the two kinds of patterns that are incorporated into the power networks;
Fig. 2 is of the present utility model having concurrently from the method for work flow chart (part) of the wind generator system of net, the two kinds of patterns that are incorporated into the power networks.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in Figure 1, of the present utility model having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks comprises:
The wind-powered electricity generation unit 1 of one or some MW class, the output of each wind-powered electricity generation unit 1 is connected with high-voltage fence main bus bar 7 (being equivalent to electrical network) by transformer 61 and switch, is parallel with user load 9 on the high-voltage fence main bus bar 7.Some batteries 2 and a batteries to store energy are regulated (the Power Conditioning System of system, PCS) 3, batteries to store energy regulating system 3 comprises some management of charging and discharging systems and system's transmission monitor, system's transmission monitor is connected with each management of charging and discharging system by some CAN interfaces and carries out information interaction, and according to the instruction works of management of charging and discharging system; Batteries 2 is corresponding one by one with the management of charging and discharging system, each batteries 2 connects the dc terminal of corresponding management of charging and discharging system, the interchange end of each the management of charging and discharging system access in parallel one common bus 8(mode of connection adopts based on the single busbar connection of 6-10kV ac bus connection emanant), be connected with high-voltage fence main bus bar 7 by transformer 62, switch again, tie point forms PCC point (Point of common coupling, point of common coupling), stablizing of the voltage that PCC is ordered and frequency values can guarantee the stable of user load 9 electricity consumptions; The management of charging and discharging system comprises DSP core controller and the voltage source inverter that is connected with the DSP core controller.One unloaded loads 5, it is connected with high-voltage fence main bus bar 7 by transformer 63, and unloaded loads 5 is connected with system transmission monitor communication, is used for consuming the electric energy of high-voltage fence main bus bar 7 outputs under the control of system's transmission monitor, voltage and frequency stabilization that PCC is ordered.One outside stand-by power supply 4, it is connected with high-voltage fence main bus bar 7 by transformer 64, and outside stand-by power supply 4 also is connected with system transmission monitor communication, and being used for be that high-voltage fence main bus bar 7 is powered voltage and frequency stabilization that PCC is ordered under the control of system's transmission monitor.Wind-powered electricity generation unit 1 and batteries to store energy regulating system 3 are connected by switch.
The group number of wind-powered electricity generation unit 1 of the present utility model is according to conservation of energy principle, calculates with user load 9 demands.The output of each wind-powered electricity generation unit 1 connects a transformer 61, and access high-voltage fence main bus bar 7 in parallel after the electricity process transformer 61 preliminary voltage stabilizings that the fluctuation of wind-powered electricity generation unit 1 output is larger, is transported on the high-voltage fence main bus bar 7 again.
Definite method of the group number of batteries 2 of the present utility model is: at first basis discharges and recharges the lowest power of limit power calculating accumulator group 2, thereby obtains the least energy of batteries 2; Obtained again the total cost of outside stand-by power supply 4 energy output and the utility model system by actual measurement hour wind speed, choose batteries 2 quantity by the economy optimum at last.In addition, can also continue the requirement that band carried 8 hours according to batteries 2, filter out the wind speed section of the utility model system normal operation, calculate in the situation that do not drop into outside stand-by power supply 4, the group number of required minimum batteries 2.In the above-described embodiments, the kind of batteries 2 can adopt any one or more in lithium titanate battery, sodium-sulphur battery, flow battery, lithium battery and the lead-acid battery.
In the above-described embodiments, also comprise a master control system, master control system is connected with each switch.
In the above-described embodiments, also comprise a host computer, host computer carries out information interaction by RS485 interface and system's transmission monitor, so that the management of charging and discharging system is carried out remote monitoring and control, host computer also comprises a man-machine interface, it carries out information interaction by CAN interface and system's transmission monitor, so that the management of charging and discharging system is carried out human-computer dialogue, Long-distance Control etc.
As shown in Figure 2, of the present utility model having concurrently from the method for work of the wind generator system of net, the two kinds of patterns that are incorporated into the power networks is:
When the wind-powered electricity generation unit starting, whether the master control system inspection opens from the net pattern, as not opening (no), then enter the pattern of being incorporated into the power networks, switch (switch is incorporated into the power networks) between closed wind-powered electricity generation unit and the high-voltage fence main bus bar, and disconnecting switch between batteries to store energy regulating system and the wind-powered electricity generation unit and the switch between batteries to store energy regulating system and the high-voltage fence main bus bar, the wind-powered electricity generation unit is that the high-voltage fence main bus bar is powered.
As opening (being) from the net pattern, then enter from the net pattern, disconnect the switch (switch is incorporated into the power networks) between wind-powered electricity generation unit and the high-voltage fence main bus bar, and closed batteries to store energy regulating system and wind-powered electricity generation unit between switch between switch and batteries to store energy regulating system and the high-voltage fence main bus bar, the wind-powered electricity generation unit is the batteries power supply.
Batteries is regulated voltage, the frequency stabilization that PCC is ordered by the batteries to store energy regulating system, is preset with the upper limit value and lower limit value of the voltage at voltage, frequency values and batteries two ends that PCC orders in the DSP core controller of management of charging and discharging system:
When the DSP core controller is judged virtual voltage that PCC orders, frequency values all greater than default voltage, frequency values, and when the magnitude of voltage at batteries two ends is positioned at default upper and lower limit voltage range, voltage source inverter absorbs active power, and making PCC point voltage, frequency stabilization is preset value.
When the DSP core controller is judged virtual voltage that PCC orders, frequency values all greater than default voltage, frequency values, and when the magnitude of voltage at batteries two ends equates with the preset upper limit magnitude of voltage, the DSP core controller consumes the electric energy of high-voltage fence main bus bar output by system's transmission monitor control unloaded loads, making PCC point voltage, frequency stabilization is preset value.
When the DSP core controller is judged virtual voltage that PCC orders, frequency values all less than default voltage, frequency values, and when the magnitude of voltage at batteries two ends is positioned at default upper and lower limit voltage range, voltage source inverter sends active power, and voltage and frequency stabilization that PCC is ordered are preset value.
When the DSP core controller is judged virtual voltage that PCC orders, frequency values all less than default voltage, frequency values, and when the magnitude of voltage at batteries two ends is positioned at default upper and lower limit voltage range, the DSP core controller also starts outside stand-by power supply to the power supply of high-voltage fence main bus bar by system's transmission monitor, and voltage and frequency stabilization that PCC is ordered are preset value.
When the DSP core controller is judged virtual voltage that PCC orders, frequency values all less than default voltage, frequency values, and when the magnitude of voltage at batteries two ends equates with the lower voltage limit value of presetting, the DSP core controller starts outside stand-by power supply to the power supply of high-voltage fence main bus bar by system's transmission monitor, and voltage and frequency stabilization that PCC is ordered are preset value.
The utility model is by the active power between batteries and the PCC point, the bidirectional modulation of reactive power, when batteries and megawatt-level wind unit form independent electric power supply and disturbance occurs, the utility model can be in rated range active power and the reactive power of dynamic equilibrium independent electric power supply, the frequency of ordering take control PCC and voltage stabilization are as preset value.
It should be noted that at last: the above only is preferred embodiment of the present utility model, be not limited to the utility model, although with reference to previous embodiment the utility model is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. have concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks, it is characterized in that, comprising:
One or some typhoon group of motors, the output of described each wind-powered electricity generation unit is connected with the high-voltage fence main bus bar by transformer and switch, is connected with user load on the described high-voltage fence main bus bar;
Some batteries and a batteries to store energy regulating system, described batteries to store energy regulating system comprise some management of charging and discharging systems and the system's transmission monitor that is connected with the management of charging and discharging system; Described batteries is corresponding one by one with the management of charging and discharging system, each described batteries connects the dc terminal of corresponding management of charging and discharging system, the interchange end of each described management of charging and discharging system access in parallel one common bus, be connected with described high-voltage fence main bus bar by transformer, switch, tie point forms PCC point again; Described management of charging and discharging system comprises DSP core controller and the voltage source inverter that is connected with the DSP core controller;
One unloaded loads, it is connected with the high-voltage fence main bus bar by transformer, and described unloaded loads is connected with system transmission monitor communication;
Described wind-powered electricity generation unit is connected by switch with the batteries to store energy regulating system.
2. according to claim 1 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks, it is characterized in that, also comprise an outside stand-by power supply that is connected with the high-voltage fence main bus bar by transformer, described system transmission monitor also is connected with described outside stand-by power supply communication.
3. according to claim 1 and 2 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks is characterized in that, described management of charging and discharging system adopts the single busbar connection that is connected based on the 6-10kV ac bus emanant with the mode of connection of common bus.
4. according to claim 1 and 2 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks is characterized in that, described system transmission monitor is connected by the described management of charging and discharging of some CAN interfaces and each system.
5. according to claim 1 and 2 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks is characterized in that, described batteries adopts one or more in lithium titanate battery, sodium-sulphur battery, flow battery, lithium battery and the lead-acid battery.
6. according to claim 1 and 2 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks is characterized in that, also comprise a master control system, described master control system is connected with each switch.
7. according to claim 1 and 2 having concurrently from the wind generator system of net, the two kinds of patterns that are incorporated into the power networks, it is characterized in that, also comprise a host computer, described host computer is connected with described system transmission monitor communication by the RS485 interface, and described host computer comprises a man-machine interface, and described man-machine interface is connected with described system transmission monitor communication by the CAN interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204797921U CN202772602U (en) | 2012-09-19 | 2012-09-19 | Wind power generation system possessing off-grid mode and grid-connected mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204797921U CN202772602U (en) | 2012-09-19 | 2012-09-19 | Wind power generation system possessing off-grid mode and grid-connected mode |
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| Publication Number | Publication Date |
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| CN202772602U true CN202772602U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204797921U Expired - Lifetime CN202772602U (en) | 2012-09-19 | 2012-09-19 | Wind power generation system possessing off-grid mode and grid-connected mode |
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| CN (1) | CN202772602U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683316A (en) * | 2012-09-19 | 2014-03-26 | 国电联合动力技术有限公司 | Wind power generation system with off-grid and grid-connection modes and working method thereof |
| EA027232B1 (en) * | 2012-11-30 | 2017-07-31 | Шнейдер Электрик Эндюстри Сас | System for supplying direct electric power for at least two loads from an alternating electric power source and method for starting such a supply system |
-
2012
- 2012-09-19 CN CN2012204797921U patent/CN202772602U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683316A (en) * | 2012-09-19 | 2014-03-26 | 国电联合动力技术有限公司 | Wind power generation system with off-grid and grid-connection modes and working method thereof |
| EA027232B1 (en) * | 2012-11-30 | 2017-07-31 | Шнейдер Электрик Эндюстри Сас | System for supplying direct electric power for at least two loads from an alternating electric power source and method for starting such a supply system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20130306 |