CN204258334U - Wind power generation controlling device and wind generator system - Google Patents
Wind power generation controlling device and wind generator system Download PDFInfo
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- CN204258334U CN204258334U CN201420826884.1U CN201420826884U CN204258334U CN 204258334 U CN204258334 U CN 204258334U CN 201420826884 U CN201420826884 U CN 201420826884U CN 204258334 U CN204258334 U CN 204258334U
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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
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- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses a kind of wind power generation controlling device and wind generator system, this wind power generation controlling device, comprise: power converter cells, comprise machine-side converter, dc-link capacitance and grid side converter, the AC of machine-side converter is coupled to the rotor-side of blower fan, the DC side of machine-side converter is coupled to dc-link capacitance, and the DC side of grid side converter is coupled to dc-link capacitance, and the AC of grid side converter is coupled to electrical network; Control unit, switches between doubly-fed generation operational mode and capacity operation pattern for controlling switch unit according to a control signal; And switch unit, comprise mode selector switch and grid-connected switch, wherein: the first end of mode selector switch is coupled to the stator side of blower fan and the first end of grid-connected switch, the second end short circuit of mode selector switch; The first end of grid-connected switch is coupled to the stator side of blower fan, and the second end of grid-connected switch is coupled to electrical network.
Description
Technical field
The utility model relates to a kind of wind power generation field, particularly relates to a kind ofly to be suitable for wind power generation controlling device under different wind speed environments and wind generator system.
Background technology
As everyone knows, in current megawatt level wind power generation system, mainly comprise two kinds of wind turbine generator, that is, total power wind turbine generator and double-fed wind power generator group.In other words, current a kind of wind turbine generator adopts double-fed wind generating operational mode, and another kind of wind turbine generator adopts capacity operation pattern.In general, total power wind turbine generator is primarily of total power converter and total power generator (e.g., magneto alternator, electric excitation generator, induction generator) composition, its generator operation wide ranges, incision wind speed is low, and generating efficiency is high, good to the adaptability of electrical network.But, total power wind-driven generator and total power converter expensive.Double-fed wind power generator group is primarily of double fed induction generators and double-fed converter composition, and it is relative to total power unit low price, but generating efficiency is at low wind speeds lower.In addition, double feedback electric engine itself loss at the low rotational speed that double-feedback aerogenerator group adopts is larger, and due to the operating voltage restriction of the transistor that converter uses, there is the lower limit of running speed in double-fed blower fan, best tip-speed ratio can not be maintained run in low wind speed region, generator operation narrow range.
Utility model content
For prior art Problems existing, one of the purpose of this utility model is to provide a kind of wind power generation controlling device that can switch under low wind speed and high wind speed pattern.
Another object of the present utility model is to provide a kind of wind generator system being applicable to low wind speed and high wind speed environment.
Wind power generation controlling device of the present utility model, is coupled between blower fan and electrical network, comprises:
Power converter cells, comprise machine-side converter, dc-link capacitance and grid side converter, the AC of described machine-side converter is coupled to the rotor-side of described blower fan, the DC side of described machine-side converter is coupled to described dc-link capacitance, the DC side of described grid side converter is coupled to described dc-link capacitance, and the AC of described grid side converter is coupled to described electrical network;
Control unit, switches between described doubly-fed generation operational mode and described capacity operation pattern for controlling described switch unit according to a control signal; And
Switch unit, for when wind speed meets switching condition, described wind power generation controlling device switches between doubly-fed generation operational mode and capacity operation pattern;
Described switch unit comprises mode selector switch and grid-connected switch, wherein:
The first end of described mode selector switch is coupled to the stator side of described blower fan and the first end of described grid-connected switch, the second end short circuit of described mode selector switch;
The first end of described grid-connected switch is coupled to the stator side of described blower fan, and the second end of described grid-connected switch is coupled to described electrical network.
An embodiment wherein, described wind power generation controlling device also comprises net side switch and networking switch, wherein:
The first end of described net side switch is coupled to described grid side converter, and the second end of described net side switch and the second end of described grid-connected switch couple and form a common node;
Described networking switch-linear hybrid is between described common node and described electrical network.
An embodiment wherein, when described wind power generation controlling device switches to capacity operation pattern, described grid-connected switch disconnects, and described mode selector switch, described net side switch and described networking switch are closed; When described wind power generation controlling device switches to doubly-fed generation operational mode, described mode selector switch disconnects, and described grid-connected switch, described net side switch and described networking switch are closed.
An embodiment wherein, described control unit comprises:
Receiver module, for receiving air speed data;
Comparison module, for described air speed data generation one comparative result compared with a predetermined air speed data that will receive;
Generation module, for producing described control signal according to described comparative result.
An embodiment wherein, described control unit comprises:
Receiver module, for receiving switching command;
Generation module, for producing described control signal according to described switching command.
An embodiment wherein, when being in described capacity operation pattern, the rotor-side of described blower fan, forms the 3rd transmission path between described power converter cells and described electrical network; When being in described doubly-fed generation operational mode, between the stator side of described blower fan and described electrical network, forming the first transmission path, the rotor-side of described blower fan, between described power converter cells and described electrical network, forming the second transmission path.
An embodiment wherein, described mode selector switch and described grid-connected switch are the unit switch that electronic switch, mechanical switch or electronic switch and mechanical switch are formed.
An embodiment wherein, described wind power generation controlling device also comprises energy balance unit, for described electrical network be short-circuited fault time keep described wind generator system energy balance, to realize keeping grid-connected in the given time, and send reactive current simultaneously.
An embodiment wherein, described energy balance unit is DC chopper, is coupled to first end and second end of described dc-link capacitance.
An embodiment wherein, when there is short circuit malfunction under described doubly-fed generation operational mode, described grid side converter stablizes busbar voltage, described machine-side converter sends out reactive current according to the Voltage Drop degree of depth perceptual from the described stator side of blower fan, and described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
An embodiment wherein, when there is short circuit malfunction under described capacity operation pattern, described grid side converter is stablized busbar voltage and is sent out reactive current perceptual according to the Voltage Drop degree of depth, to provide support line voltage, described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
Wind generator system of the present utility model, is coupled to electrical network, comprising:
Blower fan; And
Wind power generation controlling device, is coupled between described blower fan and described electrical network, for controlling the power flow direction between described wind generator system and described electrical network,
Wherein, described wind power generation controlling device is wind power generation controlling device as claimed in claim 1.
An embodiment wherein, described wind power generation controlling device also comprises net side switch and networking switch, wherein:
The first end of described net side switch is coupled to described grid side converter, and the second end of described net side switch and the second end of described grid-connected switch couple and form a common node;
Described networking switch-linear hybrid is between described common node and described electrical network.
An embodiment wherein, when described wind power generation controlling device switches to capacity operation pattern, described grid-connected switch disconnects, and described mode selector switch, described net side switch and described networking switch are closed; When described wind power generation controlling device switches to doubly-fed generation operational mode, described mode selector switch disconnects, and described grid-connected switch, described net side switch and described networking switch are closed.
An embodiment wherein, described mode selector switch and described grid-connected switch are the unit switch that electronic switch, mechanical switch or electronic switch and mechanical switch are formed.
An embodiment wherein, described wind power generation controlling device also comprises energy balance unit, for described electrical network be short-circuited fault time keep described wind generator system energy balance, to realize keeping grid-connected in the given time, and send reactive current simultaneously.
An embodiment wherein, described energy balance unit is DC chopper, is coupled to first end and second end of described dc-link capacitance.
An embodiment wherein, when there is short circuit malfunction under described doubly-fed generation operational mode, described grid side converter stablizes busbar voltage, described machine-side converter sends out reactive current according to the Voltage Drop degree of depth perceptual from the described stator side of blower fan, and described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
An embodiment wherein, when there is short circuit malfunction under described capacity operation pattern, described grid side converter is stablized busbar voltage and is sent out reactive current perceptual according to the Voltage Drop degree of depth, to provide support line voltage, described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
The utility model can make blower fan work under low wind speed operational mode and middle high wind speed operational mode under the control of switch unit, both there is the advantage that double-fed unit is cheap, the capacity operation pattern under the low wind friction velocity of double-fed unit can be realized simultaneously, thus effectively improve double-fed unit generating efficiency at low wind speeds, solve the shortcoming of generator operation narrow range.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the wind power generation controlling device of the utility model one embodiment;
Fig. 2 a, 2b are the structural schematic block diagram of control unit in the wind power generation controlling device of the utility model one embodiment;
Fig. 3 a is the schematic diagram that wind power generation controlling device of the present utility model is in low wind speed operational mode;
Fig. 3 b is the schematic diagram that wind power generation controlling device of the present utility model is in middle high wind speed operational mode;
Fig. 4 is the blower fan power generation system schematic diagram that the utility model one embodiment adopts bidirectional electronic switch;
Fig. 5 is the schematic diagram of a few class bidirectional electronic switch in Fig. 4;
Fig. 6 is the blower fan power generation system schematic diagram that the utility model one embodiment adopts unit switch;
Fig. 7 is the operate power curve synoptic diagram of blower fan under each wind speed section of wind generator system of the present utility model and existing dual feedback wind power generation system;
Fig. 8 is the wind power generation controlling device schematic diagram possessing FRT function of the utility model one embodiment;
Fig. 9 is the structural representation of a few class DC chopper of wind power generation controlling device in Fig. 8.
Embodiment
Further can understand below the utility model for making those skilled in the art and enumerate preferred embodiment of the present utility model, and coordinate appended accompanying drawing, describe constitution content of the present utility model in detail.For convenience of description, each accompanying drawing of the present utility model is only signal to be easier to understand the utility model, and its detailed ratio can adjust according to the demand of design.
As shown in Figure 1, wind power generation controlling device 1 of the present utility model, is coupled between double-fed wind power generator 2 and electrical network 3, comprises:
Power converter cells 11, comprise machine-side converter 111, dc-link capacitance C1 and grid side converter 112, the AC of machine-side converter 111 is coupled to the rotor-side of blower fan 2, the DC side of machine-side converter 111 is coupled to dc-link capacitance C1, the DC side of grid side converter 112 is coupled to dc-link capacitance C1, and the AC of grid side converter 112 is coupled to electrical network 3;
Switch unit 12, for when wind speed meets switching condition, described wind power generation controlling device 1 switches between doubly-fed generation operational mode and capacity operation pattern; And
Control unit 13, switches between described doubly-fed generation operational mode and described capacity operation pattern for controlling described switch unit 12 according to a control signal;
The mode of operation switching action of switch unit 12 can be controlled by control unit 13.Control unit 13 controls switch unit 12 according to a control signal and switches between described capacity operation pattern and described doubly-fed generation operational mode.Wherein, control signal can be directly the switching command of the controller (not shown) from double-fed generator 2, also can be control according to the comparative result of air speed data and predetermined air speed data.
Described switch unit 12 comprises mode selector switch S4 and grid-connected switch S 2, wherein:
The first end of described mode selector switch S4 is coupled to the stator side of described blower fan 2 and the first end of described grid-connected switch S 2, the second end short circuit of described mode selector switch S4;
The first end of described grid-connected switch S 2 is coupled to the stator side of described blower fan 2, and the second end of described grid-connected switch S 2 is coupled to described electrical network 3.
Only powered to electrical network 3 by rotor-side when low wind speed pattern in the present embodiment, the short circuit stationary part of double-fed generator 2.Now double-fed generator 2 becomes induction generator (IG), and power converter cells 11 is operated in full power convertor pattern.System works situation is similar to total power generating set.Power flow direction flows to electrical network 3 from power converter cells 11.Power converter cells 11 processes whole output of a generator, improves operating efficiency when low wind speed runs.
Due to the difference of control signal, the composition structure of control unit 13 selectively has following two kinds of composition forms.As shown in Figure 2 a, control unit 13 comprises in one embodiment:
Receiver module 130, for receiving air speed data; Wherein, air speed data can be by the controller (not shown) transmission of double-fed generator 2, selectively also directly can be transmitted by air velocity transducer (not shown).
Comparison module 132, for described air speed data generation one comparative result compared with a predetermined air speed data that will receive; Predetermined air speed data is the air speed data being stored in advance in control unit 13 or memory cell (not shown), it is the wind speed environments statistics gained according to locality, the incision rotating speed being greater than traditional double-fed wind generator can be selected, avoid incision wind speed to select too low, cause the frequent movement of two kinds of patterns.Comparison module 132 obtains current wind speed according to the air speed data received and meets first condition (low wind friction velocity) compared with a predetermined air speed data, namely the described air speed data be currently received is less than predetermined air speed data, or meet second condition (high speed condition), namely the described air speed data be currently received is more than or equal to predetermined air speed data, and comparative result is sent to generation module 134.
Generation module 134, for producing the described control signal switching to described capacity operation pattern or described doubly-fed generation operational mode according to described comparative result.
As shown in Figure 2 b, control unit 13 comprises in another embodiment:
Receiver module 131, for receiving switching command; Wherein, switching command is sent by the controller of double-fed generator 2, and switching command for switching to capacity operation pattern, or switches to doubly-fed generation operational mode.
Generation module 133, for producing the described control signal switching to described capacity operation pattern or described doubly-fed generation operational mode according to described switching command.
This enforcement is with the main distinction of the control unit structure in above-described embodiment: in the present embodiment, the receiver module 131 of control unit 13 directly receives the switching command of the controller of double-fed generator 2, wind speed reaches first condition or second condition compares judgement by the controller of double-fed generator 2, and send corresponding switching command, control unit 13 is only directly switch into capacity operation pattern or doubly-fed generation operational mode according to switching command, do not carry out the multilevel iudge operation of wind friction velocity, simplify control unit 13 to a certain extent, even control unit can be omitted, only control switch unit action according to the control signal of outside.
In addition, wind power generation controlling device 1 also comprises net side switch S 3 and networking switch S 1, wherein:
The first end of described net side switch S 3 is coupled to described grid side converter 112, and the second end of described net side switch S 3 and the second end of described grid-connected switch S 2 couple and form a common node;
Described networking switch S 1 is arranged between described common node and described electrical network 3.
As shown in Figure 3 a, be capacity operation pattern of the present utility model, i.e. the schematic diagram of each on off state of low wind speed operational mode.In such a mode, networking switch S 1, net side switch S 3, mode selector switch S4 conducting (Turn On), grid-connected switch S 2 turns off (Turn off), closed by mode selector switch S4 switch, the short circuit stationary part of double-fed generator 2.Now double-fed generator 2 becomes induction generator (IG), and power converter cells 11 is operated in full power convertor pattern.System works situation is similar to total power generating set.Grid side converter 112 stablizes busbar voltage, and regulate grid current waveform, machine-side converter 111 bears the regulating action of power output, and power flow direction flows through machine-side converter 111 from rotor-side and grid side converter 112 flows to electrical network 3.Machine-side converter 111 and grid side converter 112 process whole output of a generator.
As shown in Figure 3 b, be doubly-fed generation operational mode of the present utility model, the schematic diagram of each on off state of high wind speed operational mode namely.In such a mode, mode selector switch S4 turns off (Turn off), and networking switch S 1, grid-connected switch S 2, net side switch S 3 conducting (Turn on), system works situation is consistent with traditional double-fed wind power generator group.It is constant that grid side converter 112 maintains DC bus-bar voltage, and machine-side converter 111 controls excitation field direction of rotation and the size of rotor windings according to rotating speed and power, realizes the variable speed constant frequency work of blower fan.Power flow direction is that the stator side of double-fed generator 2 sends power to electrical network 3, grid side converter 112 and machine-side converter 111 according to the change of rotation speed of fan, energy in bidirectional flow.When double-fed generator 2 rotating speed exceedes synchronous speed, grid side converter 112 and machine-side converter 111 send energy to electrical network 3 direction, when double-fed generator 2 rotating speed is lower than synchronous speed, grid side converter 112 and machine-side converter 111 absorb energy from electrical network 3 direction.
As shown in table 1 below, illustrate the switch logic state of two kinds of mode of operation S1-S4 switches.Usual switch can adopt mechanical switch, as contactor (contactor), and circuit breaker (Breaker) etc.Mechanical switch needs longer disjunction in handoff procedure, service time (20ms-200ms), in order to reduce switching time, bidirectional electronic switch can be adopted to replace mechanical switch.The schematic diagram that Fig. 4 is grid-connected switch S 2, mode selector switch S4 adopts bidirectional thyristor (SCR) electronic switch, within can reducing to 20ms switching time.Fig. 5 is the schematic diagram of selectively several bidirectional electronic switch (a), (b), (c), but the kind of bidirectional electronic switch is not as limit.
Table 1
As shown in Figure 6, grid-connected switch S 2 also can adopt the mode of unit switch, namely adopts the mode of mechanical switch S2 and electronic switch A2 parallel connection.The large advantage of unit switch existing mechanical switch carrying stream has again electronic switch to switch fast advantage.Coordinate corresponding switching logic to control, the seamless switching of two kinds of patterns can be realized.
Under low cruise (IG) pattern, mechanical switch S2 disconnects, and bidirectional electronic switch A2 disconnects, and mode selector switch S4, networking switch S 1, net side switch S 3 close.When will to double-fed patten transformation time, first closed bidirectional electronic switch A2, simultaneously Disconnected mode diverter switch S4, state before grid-connected mechanical switch S2, networking switch S 1, net side switch S 3 keep.Because grid-connected bidirectional electronic switch A2, mode selector switch S4 are all bidirectional electronic switch, State Transferring completes at once.Achieve by the conversion of IG to double-fed pattern.Stator current is born in short-term by grid-connected bidirectional electronic switch A2, turn off grid-connected mechanical switch S2 again, now grid-connected mechanical switch S2, grid-connected bidirectional electronic switch A2 parallel operation, because grid-connected mechanical switch S2 impedance is less, stator current great majority are flow through by grid-connected mechanical switch S2, grid-connected bidirectional electronic switch A2 bears less load current, reduces the use cost of bidirectional electronic switch.After grid-connected mechanical switch S2 completes and closes, then disconnect grid-connected bidirectional electronic switch A2, the whole stator current of grid-connected mechanical switch S2 alone bear.Whole handoff procedure terminates.
Same, under high speed pattern (DFIG) pattern, grid-connected mechanical switch S2 closes, and grid-connected bidirectional electronic switch A2 disconnects, and networking switch S 1, net side switch S 3 close, and mode selector switch S4 disconnects.When will to IG patten transformation time, first closed grid-connected bidirectional electronic switch A2, simultaneously Disconnected mode diverter switch S4, state before grid-connected mechanical switch S2, networking switch S 1, net side switch S 3 keep.Now grid-connected mechanical switch S2, grid-connected bidirectional electronic switch A2 parallel operation, because grid-connected mechanical switch S2 impedance is less, stator current great majority are flow through by grid-connected mechanical switch S2, and grid-connected bidirectional electronic switch A2 bears less load current.Turn off grid-connected mechanical switch S2 again, bear whole stator current by grid-connected bidirectional electronic switch A2 in short-term.Closed mode diverter switch S4 again, disconnects grid-connected bidirectional electronic switch A2, and because grid-connected bidirectional electronic switch A2, mode selector switch S4 are all bidirectional electronic switch, State Transferring completes at once.Achieve by the conversion of double-fed to IG pattern, whole handoff procedure terminates.The switch logic state of each switch of the blower fan power generation system adopting unit switch is shown as following table 2.
Table 2
In order to can exposure the utility model clearly, describe in detail below by way of power.As shown in Figure 7, the power curve schematic diagram of the utility model Wind turbines under each wind speed, wherein bold portion is fan operation power curve of the present utility model, and dotted portion is traditional double-fed generator operation curve.Middle high wind speed section (>6m/s), two curve co-insides, distinguish in low wind speed section, operate power curve of the present utility model is obviously more optimized.For 1.5MW fed System, the incision wind speed of tradition double-fed electricity generation system is about 3.4m/s, before reaching rated wind speed, blower fan control system is by controlling blade Windward angle, make electricity generation system maximum power output as much as possible, after arriving rated wind speed, by controlling the change of blade Windward angle, keep electricity generation system constant power output.In the utility model, before not reaching switching wind speed, by switching corresponding switch and net side, the coordinated control system of pusher side current transformer is operated in capacity operation pattern (low-speed operation mode), and the incision wind speed of capacity operation pattern is far below traditional doubly-fed generation system incision wind speed.After wind speed reaches switching wind speed, system is converted to double-fed operational mode (high speed operational mode).
According to Utilities Electric Co. of various countries standard-required; the high-power wind turbine equipment of generating electricity by way of merging two or more grid systems needs to have FRT (fault traversing) function; namely, when electrical network occurs as short trouble, generating equipment needs to keep at the appointed time and net state, can not protectiveness off-grid.Want can send certain reactive current, to realize the voltage support to network system simultaneously.Due to the operational mode that the utility model has low speed different with high speed two kinds, need to consider can both meet this requirement under different operational mode.
As shown in Figure 8, be the control system schematic diagram that the utility model one embodiment possesses FRT function.By entering energy balance unit 14 at converter DC bus side joint, the busbar voltage fluctuation caused by energy imbalance when electric network fault can well be solved, protection current transformer electronic devices and components, thus realize FRT function of the present utility model.Energy balance unit 14 is optionally DC chopper, and described DC chopper is coupled to first end and second end of electric capacity C1.Wherein be illustrated in figure 9 DC chopper (a), (b), (c), (d) several topological schematic diagram.Comprise a DC chopped-wave brachium pontis and an energy bleeder resistance, DC chopped-wave brachium pontis can have multiple different form, is made up of IGBT and Diode.Bleeder resistance also can be connected between positive bus-bar and brachium pontis mid point or between negative busbar and brachium pontis mid point.
When there is short circuit malfunction under IG pattern, grid side converter 112 also needs to send out reactive current perceptual according to the Voltage Drop degree of depth, to provide support line voltage except busbar voltage of stablizing the same as normal work.DC chopper carries out according to the size of DC bus-bar voltage the balance opening or turn off to maintain machine-side converter 111 and grid side converter 112 energy.
When there is short circuit malfunction under DFIG pattern, net side converter 112 stablizes busbar voltage, and pusher side current transformer 111 sends out reactive current perceptual, to provide support line voltage according to the Voltage Drop degree of depth from stator side.DC chopper carries out according to the size of DC bus-bar voltage the balance opening or turn off to maintain pusher side net side energy.
As shown in Figure 1, the wind generator system of the utility model one embodiment, is coupled to electrical network 3, comprises:
Blower fan 2; And
Wind power generation controlling device 1, is coupled between described blower fan 2 and described electrical network 1, controls for the transmission of electricity between described blower fan 2 and described electrical network 3;
Wherein, described wind power generation controlling device 1 comprises:
Power converter cells 11, comprise machine-side converter 111, dc-link capacitance C1 and grid side converter 112, the AC of machine-side converter 111 is coupled to the rotor-side of blower fan 2, the DC side of machine-side converter 111 is coupled to dc-link capacitance C1, the DC side of grid side converter 112 is coupled to dc-link capacitance C1, and the AC of grid side converter 112 is coupled to electrical network 3; And
Switch unit 12, for when wind speed meets switching condition, described wind power generation controlling device 1 switches between doubly-fed generation operational mode and capacity operation pattern.
Control device 1 structure in the present embodiment and mode of operation describe in detail in the embodiment above, do not repeat them here.
Below illustrative embodiments of the present utility model is illustrate and described particularly.Should be appreciated that, the utility model is not limited to disclosed execution mode, and on the contrary, the utility model intention contains the various amendment and equivalent replacement that comprise within the scope of the appended claims.
Claims (19)
1. a wind power generation controlling device, is coupled between blower fan and electrical network, it is characterized in that, comprising:
Power converter cells, comprise machine-side converter, dc-link capacitance and grid side converter, the AC of described machine-side converter is coupled to the rotor-side of described blower fan, the DC side of described machine-side converter is coupled to described dc-link capacitance, the DC side of described grid side converter is coupled to described dc-link capacitance, and the AC of described grid side converter is coupled to described electrical network;
Control unit, switches between described doubly-fed generation operational mode and described capacity operation pattern for controlling described switch unit according to a control signal; And
Switch unit, for when wind speed meets switching condition, described wind power generation controlling device switches between doubly-fed generation operational mode and capacity operation pattern;
Described switch unit comprises mode selector switch and grid-connected switch, wherein:
The first end of described mode selector switch is coupled to the stator side of described blower fan and the first end of described grid-connected switch, the second end short circuit of described mode selector switch;
The first end of described grid-connected switch is coupled to the stator side of described blower fan, and the second end of described grid-connected switch is coupled to described electrical network.
2. wind power generation controlling device as claimed in claim 1, is characterized in that, described wind power generation controlling device also comprises net side switch and networking switch, wherein:
The first end of described net side switch is coupled to described grid side converter, and the second end of described net side switch and the second end of described grid-connected switch couple and form a common node;
Described networking switch-linear hybrid is between described common node and described electrical network.
3. wind power generation controlling device as claimed in claim 2, is characterized in that, when described wind power generation controlling device switches to capacity operation pattern, described grid-connected switch disconnects, and described mode selector switch, described net side switch and described networking switch are closed; When described wind power generation controlling device switches to doubly-fed generation operational mode, described mode selector switch disconnects, and described grid-connected switch, described net side switch and described networking switch are closed.
4. wind power generation controlling device as claimed in claim 1, it is characterized in that, described control unit comprises:
Receiver module, for receiving air speed data;
Comparison module, for described air speed data generation one comparative result compared with a predetermined air speed data that will receive;
Generation module, for producing described control signal according to described comparative result.
5. wind power generation controlling device as claimed in claim 1, it is characterized in that, described control unit comprises:
Receiver module, for receiving switching command;
Generation module, for producing described control signal according to described switching command.
6. wind power generation controlling device as claimed in claim 1, is characterized in that, when being in described capacity operation pattern, the rotor-side of described blower fan, forms the 3rd transmission path between described power converter cells and described electrical network; When being in described doubly-fed generation operational mode, between the stator side of described blower fan and described electrical network, forming the first transmission path, the rotor-side of described blower fan, between described power converter cells and described electrical network, forming the second transmission path.
7. wind power generation controlling device as claimed in claim 1, it is characterized in that, described mode selector switch and described grid-connected switch are the unit switch that electronic switch, mechanical switch or electronic switch and mechanical switch are formed.
8. wind power generation controlling device as claimed in claim 1, it is characterized in that, described wind power generation controlling device also comprises energy balance unit, for described electrical network be short-circuited fault time keep described wind generator system energy balance, to realize keeping grid-connected in the given time, and send reactive current simultaneously.
9. wind power generation controlling device as claimed in claim 8, it is characterized in that, described energy balance unit is DC chopper, is coupled to first end and second end of described dc-link capacitance.
10. wind power generation controlling device as claimed in claim 9, it is characterized in that, when there is short circuit malfunction under described doubly-fed generation operational mode, described grid side converter stablizes busbar voltage, described machine-side converter sends out reactive current according to the Voltage Drop degree of depth perceptual from the described stator side of blower fan, and described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
11. wind power generation controlling devices as claimed in claim 9, it is characterized in that, when there is short circuit malfunction under described capacity operation pattern, described grid side converter is stablized busbar voltage and is sent out reactive current perceptual according to the Voltage Drop degree of depth, to provide support line voltage, described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
12. 1 kinds of wind generator systems, are coupled to electrical network, it is characterized in that, comprising:
Blower fan; And
Wind power generation controlling device, is coupled between described blower fan and described electrical network, for controlling the power flow direction between described wind generator system and described electrical network,
Wherein, described wind power generation controlling device is wind power generation controlling device as claimed in claim 1.
13. wind generator systems as claimed in claim 12, is characterized in that, described wind power generation controlling device also comprises net side switch and networking switch, wherein:
The first end of described net side switch is coupled to described grid side converter, and the second end of described net side switch and the second end of described grid-connected switch couple and form a common node;
Described networking switch-linear hybrid is between described common node and described electrical network.
14. wind generator systems as claimed in claim 13, is characterized in that, when described wind power generation controlling device switches to capacity operation pattern, described grid-connected switch disconnects, and described mode selector switch, described net side switch and described networking switch are closed; When described wind power generation controlling device switches to doubly-fed generation operational mode, described mode selector switch disconnects, and described grid-connected switch, described net side switch and described networking switch are closed.
15. wind generator systems as claimed in claim 12, is characterized in that, described mode selector switch and described grid-connected switch are the unit switch that electronic switch, mechanical switch or electronic switch and mechanical switch are formed.
16. wind generator systems as claimed in claim 12, it is characterized in that, described wind power generation controlling device also comprises energy balance unit, for described electrical network be short-circuited fault time keep described wind generator system energy balance, to realize keeping grid-connected in the given time, and send reactive current simultaneously.
17. wind generator systems as claimed in claim 16, it is characterized in that, described energy balance unit is DC chopper, is coupled to first end and second end of described dc-link capacitance.
18. wind generator systems as claimed in claim 17, it is characterized in that, when there is short circuit malfunction under described doubly-fed generation operational mode, described grid side converter stablizes busbar voltage, described machine-side converter sends out reactive current according to the Voltage Drop degree of depth perceptual from the described stator side of blower fan, and described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
19. wind generator systems as claimed in claim 17, it is characterized in that, when there is short circuit malfunction under described capacity operation pattern, described grid side converter is stablized busbar voltage and is sent out reactive current perceptual according to the Voltage Drop degree of depth, to provide support line voltage, described DC chopper carries out according to the size of DC bus-bar voltage the energy balance opening or turn off to maintain machine-side converter and grid side converter.
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| CN105226713A (en) * | 2015-10-28 | 2016-01-06 | 三一重型能源装备有限公司 | A kind of wind turbine control system and method |
| CN105217181A (en) * | 2015-09-29 | 2016-01-06 | 江苏金源锻造股份有限公司 | A kind of heating system for primary oil storage bank |
| EP4084318A1 (en) * | 2021-04-30 | 2022-11-02 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | A wind power facility and method |
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- 2014-12-23 CN CN201420826884.1U patent/CN204258334U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105217181A (en) * | 2015-09-29 | 2016-01-06 | 江苏金源锻造股份有限公司 | A kind of heating system for primary oil storage bank |
| CN105226713A (en) * | 2015-10-28 | 2016-01-06 | 三一重型能源装备有限公司 | A kind of wind turbine control system and method |
| CN105226713B (en) * | 2015-10-28 | 2018-03-06 | 三一重型能源装备有限公司 | A kind of wind turbine control system and method |
| EP4084318A1 (en) * | 2021-04-30 | 2022-11-02 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | A wind power facility and method |
| EP4084320A1 (en) * | 2021-04-30 | 2022-11-02 | Siemens Gamesa Renewable Energy Innovation & Technology S.L. | A wind power facility and method |
| CN115589026A (en) * | 2022-11-02 | 2023-01-10 | 北京索英电气技术有限公司 | Power supply system and grid-connected and off-grid switching method of energy storage converter |
| CN115589026B (en) * | 2022-11-02 | 2023-11-14 | 北京索英电气技术股份有限公司 | Power supply system and grid-connected/disconnected switching method of energy storage converter |
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