CN209046275U - Current transformer pusher side common-mode voltage inhibits device, current transformer and wind power generating set - Google Patents
Current transformer pusher side common-mode voltage inhibits device, current transformer and wind power generating set Download PDFInfo
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- CN209046275U CN209046275U CN201822190961.XU CN201822190961U CN209046275U CN 209046275 U CN209046275 U CN 209046275U CN 201822190961 U CN201822190961 U CN 201822190961U CN 209046275 U CN209046275 U CN 209046275U
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- 239000003990 capacitor Substances 0.000 claims abstract description 24
- 230000005611 electricity Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 230000005764 inhibitory process Effects 0.000 description 8
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
The utility model provides a kind of current transformer pusher side common-mode voltage and inhibits device, current transformer and wind power generating set.Described device includes: rectification module, DC bus, DC support capacitor, controllable inverter module and isolating transformer, wherein, rectification module, DC support capacitor, controllable inverter module, isolating transformer are arranged in order between the output end of generating equipment and power grid；Wherein, the input terminal of rectification module is used to connect the output end of the generating equipment, and the output end of the rectification module is connected to DC bus；The anode and cathode of DC support capacitor are connected respectively to the direct current positive bus and direct current negative busbar of the DC bus；DC bus is connected to the primary side of isolating transformer via controllable inverter module, and the secondary side of isolating transformer is connected to power grid.According to described device, current transformer and wind power generating set, alternating current additionally can be fed to power grid while inhibiting pusher side common-mode voltage well.
Description
Technical field
The utility model all things considered is related to electron electric power technical field, more particularly, is related to a kind of current transformer pusher side
Common-mode voltage inhibits device, current transformer and wind power generating set.
Background technique
Currently, main using the RLC common-mode voltage filter circuit being made of resistance R, inductance L and capacitor C as shown in Figure 1
It is filtered come the pusher side common-mode voltage to current transformer, to reduce the amplitude of pusher side common-mode voltage.However, this inhibition pusher side is total
The mode of mode voltage for the length of cable between current transformer pusher side parameter, generating equipment parameter, current transformer and generating equipment all
Compare sensitive, needs that different RLC parameters is arranged for different generating equipments, and for the spike of high frequency pusher side common-mode voltage
It can not completely inhibit, in addition, finally being converted the energy of pusher side common-mode voltage by way of this inhibition pusher side common-mode voltage
It is distributed for heat, causes the calorific value of RLC common-mode voltage filter circuit larger.
Summary of the invention
The exemplary embodiment of the utility model is to provide a kind of inhibition of current transformer pusher side common-mode voltage device, current transformer
And wind power generating set, inhibit pusher side common-mode voltage to rely on the type selecting of each device parameters to reduce, promotes current transformer pusher side
The applicability of common-mode voltage Restrain measurement.
Exemplary embodiment according to the present utility model provides a kind of current transformer pusher side common-mode voltage inhibition device, described
Device includes: rectification module, DC bus, DC support capacitor, controllable inverter module and isolating transformer, wherein rectification
Module, DC support capacitor, controllable inverter module, isolating transformer are arranged in order at the output end and power grid of generating equipment
Between；Wherein, the input terminal of rectification module is used to connect the output end of the generating equipment, and the output end of the rectification module connects
It is connected to DC bus；The anode and cathode of DC support capacitor are connected respectively to the direct current positive bus and direct current of the DC bus
Negative busbar；DC bus is connected to the primary side of isolating transformer via controllable inverter module, and the secondary side of isolating transformer is connected to
Power grid.
Optionally, described device further include: pre-charge module, wherein the secondary side of isolating transformer is via pre-charge module
It is connected to power grid, pre-charge module obtains voltage from power grid and is pre-charged to DC bus.
Optionally, the rectification module is uncontrollable rectifier bridge, and the uncontrollable rectifier bridge includes: first diode, the two or two
Pole pipe, third diode and the 4th diode, wherein first diode and the second diode are serially connected in direct current positive bus and straight
It flows between negative busbar；Third diode and the 4th diode are serially connected between direct current positive bus and direct current negative busbar；One or two pole
The cathode of pipe and the cathode of third diode are connected to direct current positive bus, the anode of the anode of the second diode and the 4th diode
It is connected to direct current negative busbar；The anode of first diode connects the output end of the generating equipment, and the anode of third diode connects
Ground.
Optionally, the controllable inverter module includes: the first insulated gate bipolar transistor, the second insulated gate bipolar crystalline substance
Body pipe, third insulated gate bipolar transistor, the 4th insulated gate bipolar transistor, the first freewheeling diode, the second afterflow two
Pole pipe, third freewheeling diode and the 4th freewheeling diode, wherein the collector of the first insulated gate bipolar transistor and
The collector of three insulated gate bipolar transistors is connected to direct current positive bus, the emitter of the second insulated gate bipolar transistor and
The emitter of 4th insulated gate bipolar transistor is connected to direct current negative busbar, the emitter of the first insulated gate bipolar transistor
One end of the primary side of isolating transformer, third insulated gate bipolar are connected to the collector of the second insulated gate bipolar transistor
The collector of the emitter of transistor and the 4th insulated gate bipolar transistor is connected to the other end of the primary side of isolating transformer,
Wherein, the first insulated gate bipolar transistor and the first freewheeling diode reverse parallel connection, the second insulated gate bipolar transistor with
Second freewheeling diode reverse parallel connection, third insulated gate bipolar transistor and third freewheeling diode reverse parallel connection, the 4th are absolutely
Edge grid bipolar junction transistor and the 4th freewheeling diode reverse parallel connection.
Optionally, the pre-charge module includes: pre-charge contactor, pre-charge resistance and main contactor, wherein isolation
The one end on the secondary side of transformer is connected to one end of pre-charge contactor and one end of main contactor, the other end connection of main contact
The other end to power grid, pre-charge contactor is connected to power grid via pre-charge resistance.
Another exemplary embodiment according to the present utility model, provides a kind of current transformer, and the current transformer includes institute as above
The current transformer pusher side common-mode voltage stated inhibits device.
Another exemplary embodiment according to the present utility model provides a kind of wind power generating set, the wind-driven generator
Group include current transformer as described above, the generating equipment be the wind power generating set generator, the three of the generator
Phase output terminal is connected to the input terminal of the current transformer.
Inhibit device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment, by pusher side common mode
Voltage absorbed, stored, inversion, and is eventually converted into and is had access to the alternating current of power grid and be fed to power grid, can be very
While inhibiting pusher side common-mode voltage well, the generated energy for increasing generating equipment, reduces hair at the generating efficiency for improving generating equipment
Heat；Also, it is all unwise to the length of cable between current transformer pusher side parameter, generating equipment parameter, current transformer and generating equipment
Sense promotes the applicability of current transformer pusher side common-mode voltage Restrain measurement so as to be perfectly suitable for different service conditions.
Part in following description is illustrated into the other aspect and/or advantage of the utility model general plotting, also
A part will be apparent by description, or can implementation Jing Guo the utility model general plotting and learn.
Detailed description of the invention
Pass through the description carried out below with reference to the attached drawing for being exemplarily illustrated embodiment, the utility model exemplary embodiment
Above and other purpose and feature will become apparent, in which:
Fig. 1 shows the example of the existing RLC common-mode voltage filter circuit for being filtered to pusher side common-mode voltage；
Fig. 2 shows the signals for inhibiting device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment
Figure；
The current transformer pusher side common-mode voltage that Fig. 3 shows another exemplary embodiment according to the present utility model inhibits device
Schematic diagram；
Fig. 4 shows the circuit for inhibiting device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment
Figure；
Fig. 5 shows the process of the current transformer pusher side common-mode voltage suppressing method according to the utility model exemplary embodiment
Figure；
Fig. 6 shows the current transformer pusher side common-mode voltage suppressing method of another exemplary embodiment according to the present utility model
Flow chart.
Specific embodiment
It reference will now be made in detail the embodiments of the present invention, examples of the embodiments are shown in the accompanying drawings, wherein identical
Label refer to identical component always.It will illustrate the embodiment by referring to accompanying drawing below, it is practical to explain
It is novel.
Fig. 2 shows the signals for inhibiting device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment
Figure.
As shown in Fig. 2, including: according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment inhibition device
Rectification module 10, DC bus 20, DC support capacitor 30, controllable inverter module 40 and isolating transformer 50.Rectification module
10, DC support capacitor 30, controllable inverter module 40, isolating transformer 50 be arranged in order at the output end of generating equipment with
Between power grid.
The input terminal of rectification module 10 is used to connect the output end of the generating equipment, the output end connection of rectification module 10
To DC bus 20；The anode and cathode of DC support capacitor 30 are connected respectively to the direct current positive bus and direct current of DC bus 20
Negative busbar；DC bus 20 is connected to the primary side of isolating transformer 50, the pair of isolating transformer 50 via controllable inverter module 40
While being connected to power grid.The pusher side common-mode voltage that rectification module 10 generates when running current transformer is rectified into DC voltage, and will be whole
The single-phase AC voltage that direct voltage output after stream exports controllable inverter module 40 to DC bus 20, isolating transformer 50
It is converted, transformed alternating voltage is linked into power grid, and common-mode voltage and power grid are isolated.
As an example, the generating equipment can be the generator of wind power generating set.It should be understood that the generating equipment
It is also possible to other kinds of generating equipment.
As an example, the input terminal of rectification module 10 may be connected to the three-phase output end of the generating equipment (that is, A phase is defeated
One of outlet, B phase output terminal and C phase output terminal), also, the three-phase output end is connected to the input terminal of the current transformer.
In Fig. 2, only by taking the input terminal of rectification module 10 is connected to the A phase output terminal of the generating equipment as an example, here,
It should be understood that the input terminal of rectification module 10 can be connected to the B phase output terminal or C phase output terminal of the generating equipment, it is practical
On, three should be arranged for a generating equipment and pressed down according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment
Device processed, the three-phase output end of the generating equipment and these three current transformer pusher side common-mode voltages inhibit device to correspond, each
Phase output terminal is connected respectively to corresponding current transformer pusher side common-mode voltage and inhibits device, inhibits current transformer to set with power generation to realize
Standby each corresponding pusher side common-mode voltage.In addition, the GND in Fig. 2 indicates ground connection.
Particularly, the pusher side common-mode voltage that rectification module 10 is used to generate when running current transformer is rectified into direct current
Pressure, and by the direct voltage output after rectification to DC bus 20.
As an example, rectification module 10 can be the uncontrollable rectifier bridge for including 4 diodes.
As an example, the diode can be silicon carbide diode.In view of the frequency of the pusher side common-mode voltage of current transformer
It is higher, voltage change ratio is larger, exemplary embodiment according to the present utility model can, Reverse recovery higher by voltage endurance capability when
Between shorter silicon carbide diode realize the uncontrollable rectifier function of the pusher side common-mode voltage to high-frequency, big voltage change ratio,
Inhibited well so as to the spike to high frequency pusher side common-mode voltage, improve the effect of the absorption to pusher side common-mode voltage
Fruit.
The DC voltage that DC support capacitor 30 is used to export rectification module 10 carries out energy storage, so that DC bus 20
DC voltage increases, that is, DC support capacitor 30 plays stable DC bus for boosting to the voltage of DC bus 20
The effect of 20 voltage.
As an example, the higher thin-film capacitor of pressure resistance can be used in DC support capacitor 30.
Controllable inverter module 40 is used for the voltage stabilization of DC bus 20 within a preset range, and by DC bus 20
DC voltage inversion is single-phase AC voltage, that is, the DC energy of DC bus 20 is converted to AC energy.
As an example, controllable inverter module 40 may include 4 insulated gate bipolar transistors (IGBT) or metal-oxide
Object semiconductor field effect transistor (MOSFET).
Isolating transformer 50 is for being transformed to the single-phase AC voltage that controllable inverter module 40 exports to have access to electricity
Transformed alternating voltage is simultaneously linked into power grid by the alternating voltage of net, and pusher side common-mode voltage and power grid are isolated, with
Prevent pusher side common-mode voltage from interfering to power grid.
As an example, isolating transformer 50 can convert the alternating voltage that controllable inverter module 40 exports to the exchange of 230V
Voltage is simultaneously linked into power grid, by AC energy feed-in power grid.
Inhibit device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment, makes pusher side common-mode voltage
Energy, between current transformer and the earth by rectification module 10, DC support capacitor 30, controllable inverter module 40, change is isolated
Depressor 50 finally flows into power grid, to increase the hair of wind power generating set while inhibiting pusher side common-mode voltage well
Electricity.
Inhibit device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment, it is total with existing RLC
Mode voltage filter circuit is compared, small in size, light-weight, calorific value is small, and is had well for the energy of pusher side common-mode voltage
Absorbability can additionally increase the generated energy of generating equipment.According to the current transformer pusher side of the utility model exemplary embodiment
Common-mode voltage inhibits device to may be used on the exceeded generating equipment of the pusher side common-mode voltage run as the filter of RLC common-mode voltage
The supplement of wave circuit can also be applied in the design of new generating equipment.
The current transformer pusher side common-mode voltage that Fig. 3 shows another exemplary embodiment according to the present utility model inhibits device
Block diagram.
As shown in figure 3, including: according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment inhibition device
Rectification module 10, DC bus 20, DC support capacitor 30, controllable inverter module 40, isolating transformer 50 and precharge mould
Block 60.
Rectification module 10, DC bus 20, DC support capacitor 30, controllable inverter module 40 and isolating transformer 50 it
Between connection type, specific implementation can refer to the specific embodiment of above-mentioned combination Fig. 2 description to realize, it is no longer superfluous herein
It states.
The secondary side of isolating transformer 50 is connected to power grid via pre-charge module 60, and pre-charge module 60 obtains electricity from power grid
Pressure is pre-charged DC bus 20.
As an example, pre-charge module 60 before current transformer pusher side is also inactive to DC bus 20 for slowly filling
Electricity, to establish the voltage of DC bus 20, so that the starting of current transformer pusher side be avoided to cause to impact for DC support capacitor 30.
Fig. 4 shows the circuit for inhibiting device according to the current transformer pusher side common-mode voltage of the utility model exemplary embodiment
Figure.
As shown in figure 4, as an example, rectification module 10 can include: first diode 101, the second diode 103, third
Diode 103 and the 4th diode 104, wherein first diode 101 and the second diode 102 are serially connected in DC bus 20
Direct current positive bus 201 and direct current negative busbar 202 between；Third diode 103 and the 4th diode 104 are serially connected in direct current positive pole
Between line 201 and direct current negative busbar 202；The cathode (that is, the pole K) of first diode 101 and the cathode of third diode 103 connect
It is connected to direct current positive bus, it is negative that the anode (that is, the pole A) of the second diode 102 and the anode of the 4th diode 104 are connected to direct current
Bus；The anode of first diode 101 connects the output end of the generating equipment, the plus earth of third diode 103.
As an example, controllable inverter module 40 can include: the first insulated gate bipolar transistor 401, the second insulated gate are double
Bipolar transistor 402, third insulated gate bipolar transistor 403, the 4th insulated gate bipolar transistor 404, the first afterflow two
Pole pipe 405, the second freewheeling diode 406, third freewheeling diode 407 and the 4th freewheeling diode 408, wherein first absolutely
The collector (that is, the pole C) of edge grid bipolar junction transistor 401 is connected with the collector of third insulated gate bipolar transistor 403
To direct current positive bus 201, the emitter (that is, the pole E) of the second insulated gate bipolar transistor 402 and the 4th insulated gate bipolar
The emitter of transistor 404 is connected to direct current negative busbar 202, the emitter and second of the first insulated gate bipolar transistor 401
The collector of insulated gate bipolar transistor 402 is connected to one end of the primary side of isolating transformer 50 (that is, isolating transformer 50
1 foot), the collector of the emitter of third insulated gate bipolar transistor 403 and the 4th insulated gate bipolar transistor 404 connects
It is connected to the other end (that is, 2 feet of isolating transformer 50) of the primary side of isolating transformer 50, the first insulated gate bipolar transistor
401 and 405 reverse parallel connection of the first freewheeling diode, the second insulated gate bipolar transistor 402 and the second freewheeling diode 406 it is anti-
To in parallel, third insulated gate bipolar transistor 403 and 407 reverse parallel connection of third freewheeling diode, the 4th insulated gate bipolar
408 reverse parallel connection of transistor 404 and the 4th freewheeling diode.
As an example, pre-charge module 60 can include: pre-charge contactor 601, pre-charge resistance 602 and main contactor
603, wherein the one end (that is, 3 feet of isolating transformer 50) on the secondary side of isolating transformer 50 is connected to pre-charge contactor
601 one end (that is, 1 foot of pre-charge contactor 601) and one end of main contactor 603 are (that is, the 1 of main contactor 603
Foot), the other end (that is, 2 feet of main contactor 603) of main contact 603 is connected to power grid, pre-charge contactor 601 it is another
(that is, 2 feet of pre-charge contactor 601) are held to be connected to power grid via pre-charge resistance 602.
Here, when needing to be pre-charged DC bus 20, pre-charge contactor 601 is closed, and main contactor 603 is disconnected
It opens；At the end of precharge, pre-charge contactor 601 is disconnected, and main contactor 603 is closed.
The exemplary embodiment of the utility model also provides a kind of current transformer, and the current transformer includes such as above-mentioned exemplary reality
It applies current transformer pusher side common-mode voltage described in example and inhibits device.
The exemplary embodiment of the utility model also provides a kind of wind power generating set, and the wind power generating set includes such as
Current transformer described in the above exemplary embodiments, wherein the generating equipment is the generator of the wind power generating set, described
The three-phase output end of generator is connected to the input terminal of the current transformer.
Fig. 5 shows the process of the current transformer pusher side common-mode voltage suppressing method according to the utility model exemplary embodiment
Figure.Here, the method is applied to the current transformer pusher side common-mode voltage inhibition device as described in the above exemplary embodiments.
It is by rectification module 10 that the pusher side common mode of generation is electric when current transformer, which is run, generates pusher side common-mode voltage in S10
Pressure is rectified into DC voltage, and by the direct voltage output after rectification to DC bus 20, and right by DC support capacitor 30
The voltage of DC bus 20 boosts.
It by the voltage inversion of DC bus 20 is single-phase AC voltage by controllable inverter module 40 in S20.
In S30, the single-phase AC voltage that controllable inverter module 40 exports is transformed to connect by isolating transformer 50
Enter the alternating voltage to power grid and transformed alternating voltage is linked into power grid.Here, shown in execution according to the utility model
During the current transformer pusher side common-mode voltage suppressing method of example property embodiment, isolating transformer 50 can also be to common-mode voltage and electricity
Net is isolated.
As an example, the current transformer pusher side common-mode voltage suppressing method according to the utility model exemplary embodiment can also wrap
Include: before the current transformer brings into operation, by pre-charge module 60 from power grid obtain voltage, so as to DC bus 20 into
Line precharge, until the voltage of DC bus 20 reaches preset value, stopping is pre-charged DC bus 20.For example, described
Preset value can be 720V.
As an example, the voltage in DC bus 20 reaches the preset value, stopping is pre-charged DC bus 20
The step of after, the secondary side of isolating transformer 50 is directly connected to power grid, and controllable inverter module 40 carries out pulse width modulation
(PWM), within a preset range by the voltage stabilization of DC bus 20.For example, pulse width modulation can be used to pass through to controllable inverse
The control for becoming the IGBT or MOSFET of module 40, by the voltage stabilization of DC bus 20 in the preset range.
Fig. 6 shows the current transformer pusher side common-mode voltage suppressing method of another exemplary embodiment according to the present utility model
Flow chart.
It is filled in S101 when according to the inhibition of the current transformer pusher side common-mode voltage of the utility model exemplary embodiment referring to Fig. 6
It sets after powering on, into initialization process.
In S102, after self-test passes through, the closure of pre-charge contactor 601 of control pre-charge module 60, main contactor
603 disconnect, to be charged by pre-charge resistance 602, isolating transformer 50 and controllable inverter module 40 to DC bus 20.
In S103, the voltage U of DC bus 20 is detecteddWhether the preset value is reached.
In S104, when the voltage for detecting DC bus 20 reaches the preset value, the pre- of pre-charge module 60 is controlled
Charging contactor 601 disconnects, main contactor 603 is closed.As the voltage U of DC bus 20dWhen being unable to reach the preset value, hold
Row S105 notifies failure.
In S106, after the closure of main contactor 603, controllable inverter module 40 carries out PWM modulation work, by DC bus
20 voltage stabilization is in the preset range.
In S107, the starting of current transformer pusher side.
In S108 and S109, when the starting of current transformer pusher side will be total to after generating pusher side common-mode voltage by rectification module 10
Mode voltage is rectified into direct current, and carries out energy stores by DC support capacitor 30.
In S110, when controllable inverter module 40 is detected since 30 energy storage of DC support capacitor causes the electricity of DC bus 20
After pressure increases, closed-loop control can be carried out to the voltage of DC bus 20 to preset the control of the voltage of DC bus 20 described
In range, and the DC voltage of DC bus 20 is converted into alternating voltage.
In S111 and S112, dropped by the single-phase AC voltage that isolating transformer 50 exports controllable inverter module 40
Pressure and isolation, and be finally connected to the grid.
Although having show and described some exemplary embodiments of the utility model, those skilled in the art should be managed
Solution can in the case where not departing from the principles of the present invention defined by the claims and their equivalents and spirit
To modify to these embodiments.
Claims (7)
1. a kind of current transformer pusher side common-mode voltage inhibits device, which is characterized in that described device includes: rectification module, direct current mother
Line, DC support capacitor, controllable inverter module and isolating transformer, wherein rectification module, DC support capacitor, controllable inverse
Become module, isolating transformer is arranged in order between the output end of generating equipment and power grid；
Wherein, the input terminal of rectification module is used to connect the output end of the generating equipment, and the output end of the rectification module connects
It is connected to DC bus；
The anode and cathode of DC support capacitor are connected respectively to the direct current positive bus and direct current negative busbar of the DC bus；
DC bus is connected to the primary side of isolating transformer via controllable inverter module, and the secondary side of isolating transformer is connected to electricity
Net.
2. the apparatus according to claim 1, which is characterized in that described device further include: pre-charge module,
Wherein, the secondary side of isolating transformer is connected to power grid via pre-charge module, and pre-charge module obtains voltage pair from power grid
DC bus is pre-charged.
3. device according to claim 1 or 2, which is characterized in that the rectification module is uncontrollable rectifier bridge, described not control
Rectifier bridge includes: first diode, the second diode, third diode and the 4th diode,
Wherein, first diode and the second diode are serially connected between direct current positive bus and direct current negative busbar；Third diode with
4th diode is serially connected between direct current positive bus and direct current negative busbar；The cathode of first diode and the cathode of third diode
It is connected to direct current positive bus, the anode of the anode of the second diode and the 4th diode is connected to direct current negative busbar；
The anode of first diode connects the output end of the generating equipment, the plus earth of third diode.
4. device according to claim 1 or 2, which is characterized in that the controllable inverter module includes: that the first insulated gate is double
Bipolar transistor, the second insulated gate bipolar transistor, third insulated gate bipolar transistor, the 4th insulated gate bipolar crystal
Pipe, the first freewheeling diode, the second freewheeling diode, third freewheeling diode and the 4th freewheeling diode,
Wherein, the collector of the collector of the first insulated gate bipolar transistor and third insulated gate bipolar transistor is connected to
The emitter of direct current positive bus, the emitter of the second insulated gate bipolar transistor and the 4th insulated gate bipolar transistor connects
To direct current negative busbar,
The collector of the emitter of first insulated gate bipolar transistor and the second insulated gate bipolar transistor is connected to isolation
One end of the primary side of transformer, the collection of the emitter of third insulated gate bipolar transistor and the 4th insulated gate bipolar transistor
Electrode is connected to the other end of the primary side of isolating transformer,
Wherein, the first insulated gate bipolar transistor and the first freewheeling diode reverse parallel connection, the second insulated gate bipolar crystal
Pipe and the second freewheeling diode reverse parallel connection, third insulated gate bipolar transistor and third freewheeling diode reverse parallel connection, the
Four insulated gate bipolar transistors and the 4th freewheeling diode reverse parallel connection.
5. the apparatus of claim 2, which is characterized in that the pre-charge module includes: pre-charge contactor, preliminary filling
Resistance and main contactor,
Wherein, the one end on the secondary side of isolating transformer is connected to one end of pre-charge contactor and one end of main contactor, and master connects
The other end of touching is connected to power grid, and the other end of pre-charge contactor is connected to power grid via pre-charge resistance.
6. a kind of current transformer, which is characterized in that the current transformer includes as described in any claim among claim 1 to 5
Current transformer pusher side common-mode voltage inhibit device.
7. a kind of wind power generating set, which is characterized in that the wind power generating set includes unsteady flow as claimed in claim 6
Device, the generating equipment are the generator of the wind power generating set, and the three-phase output end of the generator is connected to the change
Flow the input terminal of device.
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| CN201822190961.XU CN209046275U (en) | 2018-12-25 | 2018-12-25 | Current transformer pusher side common-mode voltage inhibits device, current transformer and wind power generating set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN113258620A (en) * | 2021-06-24 | 2021-08-13 | 全球能源互联网研究院有限公司 | Alternating current-direct current power supply system |
-
2018
- 2018-12-25 CN CN201822190961.XU patent/CN209046275U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN110571854B (en) * | 2019-09-06 | 2023-10-20 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN113258620A (en) * | 2021-06-24 | 2021-08-13 | 全球能源互联网研究院有限公司 | Alternating current-direct current power supply system |
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