CN203850848U - Supercapacitor-based grid-connected wind farm centralized energy-storage equipment - Google Patents

Supercapacitor-based grid-connected wind farm centralized energy-storage equipment Download PDF

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Publication number
CN203850848U
CN203850848U CN201420287295.0U CN201420287295U CN203850848U CN 203850848 U CN203850848 U CN 203850848U CN 201420287295 U CN201420287295 U CN 201420287295U CN 203850848 U CN203850848 U CN 203850848U
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China
Prior art keywords
power switch
power
capacitor
signal output
power signal
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Expired - Fee Related
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CN201420287295.0U
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Chinese (zh)
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刘金龙
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HARBIN POWER SUPPLY COMPANY STATE GRID HEILONGJIANG ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
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HARBIN POWER SUPPLY COMPANY STATE GRID HEILONGJIANG ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
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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
    • 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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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model provides supercapacitor-based grid-connected wind farm centralized energy-storage equipment and belongs to the energy-storage field in wind farms. The equipment solves the problem in the prior art that, distributed energy-storage equipment adopted in existing grid-connected wind farms is large in operation maintenance load. The supercapacitor-based grid-connected wind farm centralized energy-storage equipment comprises a reactor bank, a voltage source type converter, a No.1 capacitor C, a No.1 power switch, a No.2 power switch, an inductor, a No.1 diode, a No.2 diode, and a capacitor bank. The three-phase input end of the reactor bank is connected with the output bus of a grid-connected wind farm through a transformer. The three-phase output end of the reactor bank is connected with the AC side of the voltage source type converter. The DC side of the voltage source type converter is connected in parallel with the No.1 capacitor C. The No.1 diode and the No.2 diode are connected in series and then are connected in parallel with the series circuit of the No.1 power switch and the No.2 power switch. The capacitor bank is connected with the intersection point of the No.1 power switch and the No.2 power switch through the inductor. The supercapacitor-based grid-connected wind farm centralized energy-storage equipment is mainly used for the centralized energy storage in wind farms.

Description

Energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor
Technical field
The utility model belongs to the energy storage field in wind energy turbine set.
Background technology
The domestic and international supporting Ultracapacitor Energy Storage that is arranged on wind energy turbine set of studying and using is all to adopt the mode of disperseing energy storage at present, and the case low pressure side exporting in every typhoon group of motors installs ultracapacitor storage wind energy turbine set additional exports superfluous electric energy.The energy storage device of this dispersion need to be respectively every Ultracapacitor Energy Storage configuration rectification and DC converter, and configuration expense is higher.The wind energy turbine set of install disperseing energy storage device energy-storage system when the stoppage in transit of separate unit wind turbine or maintenance needs out of service, has caused unnecessary loaded down with trivial details and trouble.In addition, this dispersion energy storage mode need to be added up respectively the ruuning situation of every energy-storage system, needs wind energy turbine set O&M personnel to carry out the operation maintenance work of a large amount of dispersions, has caused wind energy turbine set operation maintenance amount to increase, the increase of operation and maintenance cost.
Utility model content
The utility model is the large problem of distributed energy storage device operation maintenance amount adopting in order to solve current grid connected wind power place, and the utility model provides a kind of grid connected wind power field based on ultracapacitor to concentrate energy storage device.
An energy storage device is concentrated in grid connected wind power field based on ultracapacitor, and it comprises Reactor banks, voltage-source type current transformer, No. 1 capacitor C, No. 1 power switch, No. 2 power switchs, inductance, No. 1 diode, No. 2 diodes and capacitor group,
Described voltage-source type current transformer comprises 6 power switchs, and these 6 power switchs are respectively No. 3 power switchs, No. 4 power switchs, No. 5 power switchs, No. 6 power switchs, No. 7 power switchs and No. 8 power switchs,
The three-phase input end of Reactor banks is connected with grid connected wind power field output bus by transformer, the three-phase output end of Reactor banks is connected with No. 5 power switch power signal outputs with No. 3 power switch power signal outputs, No. 4 power switch power signal outputs respectively
No. 3 power switch power signal input is connected with the negative electrode of No. 1 diode with No. 4 power switch power signal inputs, No. 5 power switch power signal inputs, one end of No. 1 capacitor C, the power signal input of No. 1 power switch simultaneously,
The power signal output of No. 6 power switchs simultaneously with the power signal output of No. 7 power switchs, the other end of the power signal output of No. 8 power switchs, No. 1 capacitor C, the anode of the power signal output of No. 2 power switchs, No. 2 diodes be connected with one end of capacitor group
No. 3 power switch power signal output is connected with the power signal input of No. 6 power switchs,
No. 4 power switch power signal output is connected with the power signal input of No. 7 power switchs,
No. 5 power switch power signal output is connected with the power signal input of No. 8 power switchs,
The power signal output of No. 1 power switch is connected with the power signal input of No. 2 power switchs and one end of inductance simultaneously, and the other end of inductance is connected with the other end of capacitor group.
Described capacitor group is composed in parallel by a plurality of sub-capacitor groups, and each sub-capacitor group is comprised of a plurality of capacitor's seriess.
Described No. 1 power switch and No. 2 power switchs are insulated gate bipolar transistor.
No. 3 described power switchs, No. 4 power switchs, No. 5 power switchs, No. 6 power switchs, No. 7 power switchs and No. 8 power switchs are insulated gate bipolar transistor.
Impulse current when No. 1 capacitor C provides voltage support and cushions each brachium pontis shutoff for voltage-source type current transformer, reduces DC side harmonics.
Capacitor group its terminal voltage in charge and discharge process changes, and adds No. 1 power switch and No. 2 power switchs to solve capacitor group voltage undulation problem, for DC bus provides steady voltage, thereby makes voltage-source type current transformer be operated in continual and steady state.As can see from Figure 1, voltage-source type current transformer consists of 6 insulated gate bipolar transistors (IGBT) as rectifying device of the present utility model, and when capacitor group charge, the buck circuit by No. 1 power switch formation completes.The electric energy storing in needing releasing capacitor group is DC equipment when power supply, and the boost chopper consisting of No. 2 power switchs rises to capacitor group terminal voltage the direct voltage needing, and remains near the magnitude of voltage of regulation.No. 1 diode and No. 2 diodes are used for capacitor for voltage protection group, prevent the reverse charging of capacitor group.
The flow of power of wind energy turbine set can be represented by formula below: P E = P W - P G Q E = Q W - Q G ,
P in formula eand Q efor the meritorious and reactive power that a kind of grid connected wind power field based on ultracapacitor described in the utility model concentrates energy storage device to absorb, P wand Q wfor the meritorious and reactive power of wind energy turbine set output, P gand Q gfor injecting the meritorious and reactive power of electrical network.
The beneficial effect that the utility model brings is, adopt a kind of grid connected wind power field based on ultracapacitor described in the utility model to concentrate energy storage device to concentrate energy storage on grid connected wind power field output bus, solve tradition and disperse the deficiency of energy storage, by concentrating energy storage can realize the storage of whole wind energy turbine set output dump energy, in configuration, only need to configure a rectification and DC converter, reduce a large amount of equipment configuration expenses.In operation maintenance, only need to carry out maintenance work to a concentrated energy storage device, a large amount of operation maintenance amounts that reduce, have reduced operation expense.The electric energy that the concentrated energy storage device in a kind of grid connected wind power field based on ultracapacitor described in the utility model stores in addition can be also the DC equipment power supply in wind energy turbine set.
Accompanying drawing explanation
Fig. 1 is the principle schematic that energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor described in the utility model;
As the wind energy turbine set structure chart of Fig. 2 for the concentrated energy storage device in installing a kind of grid connected wind power field based on ultracapacitor described in the utility model.
Embodiment
Embodiment one: referring to Fig. 1, present embodiment is described, energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor described in present embodiment, and it comprises Reactor banks L, 1, No. 1 capacitor C of voltage-source type current transformer, No. 1 power switch S 1, No. 2 power switch S 2, 1, No. 1 diode VD of inductance L 1, No. 2 diode VD 2with capacitor group 2,
Described voltage-source type current transformer 1 comprises 6 power switchs, and these 6 power switchs are respectively power switch S No. 3 3, No. 4 power switch S 4, No. 5 power switch S 5, No. 6 power switch S 6, No. 7 power switch S 7with No. 8 power switch S 8,
The three-phase input end of Reactor banks L is connected by transformer and grid connected wind power field output bus, the three-phase output end of Reactor banks L respectively with No. 3 power switch S 3power signal output, No. 4 power switch S 4power signal output and No. 5 power switch S 5power signal output connects,
No. 3 power switch S 3power signal input while and No. 4 power switch S 4power signal input, No. 5 power switch S 5one end of power signal input, No. 1 capacitor C, No. 1 power switch S 1power signal input and No. 1 diode VD 1negative electrode connect,
No. 6 power switch S 6power signal output simultaneously and No. 7 power switch S 7power signal output, No. 8 power switch S 8power signal output, the other end of No. 1 capacitor C, No. 2 power switch S 2power signal output, No. 2 diode VD 2anode be connected with one end of capacitor group 2,
No. 3 power switch S 3power signal output and No. 6 power switch S 6power signal input connect,
No. 4 power switch S 4power signal output and No. 7 power switch S 7power signal input connect,
No. 5 power switch S 5power signal output and No. 8 power switch S 8power signal input connect,
No. 1 power switch S 1power signal output simultaneously and No. 2 power switch S 2power signal input be connected with one end of inductance L 1, the other end of inductance L 1 is connected with the other end of capacitor group 2.
Embodiment two: present embodiment is described referring to Fig. 1, a kind of grid connected wind power field based on ultracapacitor described in present embodiment and embodiment one concentrates the difference of energy storage device to be, described capacitor group 2 is composed in parallel by a plurality of sub-capacitor groups, and each sub-capacitor group is comprised of a plurality of capacitor's seriess.
Take certain actual first phase is example containing the wind energy turbine set of 12 double-fed fan motor unit DFIG, its single-machine capacity is 2.5MW, set end voltage is 0.69kV, concentrate energy storage device to be arranged on points of common connection PCC place, grid connected wind power field by transformer a kind of grid connected wind power field based on ultracapacitor described in the utility model, as the wind energy turbine set structure chart of Fig. 2 for the Ultracapacitor Energy Storage of the concentrated energy storage device in installing a kind of grid connected wind power field based on ultracapacitor described in the utility model.The total installation of generating capacity of this wind-powered electricity generation is 30MW, by calculating, selecting capacitor monomer capacity is 3000F, rated voltage 2.7V, series equivalent resistance is 0.045m Ω, by 4500 capacitor monomers be configured to 150 capacitors monomer series-connected become a string, totally 30 connection in series-parallel form capacitor group, and maximum can store the wind energy turbine set dump energy of 2MW, can provide DC power supply for the DC equipment in wind energy turbine set simultaneously.
Embodiment three: referring to Fig. 1, present embodiment is described, a kind of grid connected wind power field based on ultracapacitor described in present embodiment and embodiment one or two concentrates the difference of energy storage device to be, No. 1 described power switch S 1with No. 2 power switch S 2be insulated gate bipolar transistor.
Embodiment four: referring to Fig. 1, present embodiment is described, a kind of grid connected wind power field based on ultracapacitor described in present embodiment and embodiment one or two concentrates the difference of energy storage device to be, No. 3 described power switch S 3, No. 4 power switch S 4, No. 5 power switch S 5, No. 6 power switch S 6, No. 7 power switch S 7with No. 8 power switch S 8be insulated gate bipolar transistor.
Adopt a kind of grid connected wind power field based on ultracapacitor described in the utility model to concentrate energy storage device to absorb the electric energy of wind energy turbine set surplus, adopt centralized configuration energy-storage system mode, do not need to change original configuration mode of grid connected wind power field, only need to be on grid connected wind power field output bus or the network access node place of wind farm group install a kind of grid connected wind power field based on ultracapacitor described in the utility model additional and concentrate energy storage device, the maintenance and management of this energy storage device is convenient, and whole reliability is higher.When this configuration mode has solved in the past the stoppage in transit of the separate unit wind turbine causing because of decentralized configuration or maintenance, energy-storage system needs loaded down with trivial details and inefficient problem out of service has reduced equipment configuration cost and operation and maintenance cost simultaneously.

Claims (4)

1. an energy storage device is concentrated in the grid connected wind power field based on ultracapacitor, it is characterized in that, it comprises Reactor banks (L), voltage-source type current transformer (1), No. 1 capacitor C, No. 1 power switch (S 1), No. 2 power switch (S 2), inductance (L1), No. 1 diode (VD 1), No. 2 diode (VD 2) and capacitor group (2),
Described voltage-source type current transformer (1) comprises 6 power switchs, and these 6 power switchs are respectively power switch (S No. 3 3), No. 4 power switch (S 4), No. 5 power switch (S 5), No. 6 power switch (S 6), No. 7 power switch (S 7) and No. 8 power switch (S 8),
The three-phase input end of Reactor banks (L) is connected by transformer and grid connected wind power field output bus, the three-phase output end of Reactor banks (L) respectively with No. 3 power switch (S 3) power signal output, No. 4 power switch (S 4) power signal output and No. 5 power switch (S 5) connection of power signal output,
No. 3 power switch (S 3) power signal input while and No. 4 power switch (S 4) power signal input, No. 5 power switch (S 5) power signal input, one end of No. 1 capacitor C, No. 1 power switch (S 1) power signal input and No. 1 diode (VD 1) negative electrode connect,
No. 6 power switch (S 6) power signal output simultaneously and No. 7 power switch (S 7) power signal output, No. 8 power switch (S 8) power signal output, the other end of No. 1 capacitor C, No. 2 power switch (S 2) power signal output, No. 2 diode (VD 2) anode be connected with one end of capacitor group (2),
No. 3 power switch (S 3) power signal output and No. 6 power switch (S 6) power signal input connect,
No. 4 power switch (S 4) power signal output and No. 7 power switch (S 7) power signal input connect,
No. 5 power switch (S 5) power signal output and No. 8 power switch (S 8) power signal input connect,
No. 1 power switch (S 1) power signal output simultaneously and No. 2 power switch (S 2) power signal input be connected with one end of inductance (L1), the other end of inductance (L1) is connected with the other end of capacitor group (2).
2. energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor according to claim 1, it is characterized in that, described capacitor group (2) is composed in parallel by a plurality of sub-capacitor groups, and each sub-capacitor group is comprised of a plurality of capacitor's seriess.
3. energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor according to claim 1 and 2, it is characterized in that No. 1 described power switch (S 1) and No. 2 power switch (S 2) be insulated gate bipolar transistor.
4. energy storage device is concentrated in a kind of grid connected wind power field based on ultracapacitor according to claim 1 and 2, it is characterized in that No. 3 described power switch (S 3), No. 4 power switch (S 4), No. 5 power switch (S 5), No. 6 power switch (S 6), No. 7 power switch (S 7) and No. 8 power switch (S 8) be insulated gate bipolar transistor.
CN201420287295.0U 2014-05-30 2014-05-30 Supercapacitor-based grid-connected wind farm centralized energy-storage equipment Expired - Fee Related CN203850848U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105098786A (en) * 2015-09-18 2015-11-25 许昌学院 System and method for stabilizing voltage fluctuation of wind power micro-grid employing super capacitors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105098786A (en) * 2015-09-18 2015-11-25 许昌学院 System and method for stabilizing voltage fluctuation of wind power micro-grid employing super capacitors

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