CN108711872A - Distributed sub-synchronous oscillation suppression system and new energy transmission system - Google Patents
Distributed sub-synchronous oscillation suppression system and new energy transmission system Download PDFInfo
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- CN108711872A CN108711872A CN201810434128.7A CN201810434128A CN108711872A CN 108711872 A CN108711872 A CN 108711872A CN 201810434128 A CN201810434128 A CN 201810434128A CN 108711872 A CN108711872 A CN 108711872A
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- 230000010355 oscillation Effects 0.000 title claims abstract description 150
- 230000005540 biological transmission Effects 0.000 title claims abstract description 76
- 230000001629 suppression Effects 0.000 title claims abstract description 32
- 230000005611 electricity Effects 0.000 claims abstract description 67
- 230000000452 restraining effect Effects 0.000 claims abstract description 58
- 230000005684 electric field Effects 0.000 claims abstract description 43
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
The invention discloses a kind of distributed sub-synchronous oscillation suppression system and new energy transmission systems, wherein distributed sub-synchronous oscillation suppression system includes：Multiple sub-synchronous oscillation restraining devices, respectively on the corresponding transmission line of electricity between the leading-out terminal and bus rod of multiple new energy electric fields, the sub-synchronous oscillation of the multiple new energy electric field is inhibited respectively for acquiring the electric signal on the transmission line of electricity, and according to the electric signal；Control device, for distributing control signal according to electric signal output, to distribute the output situation of multiple sub-synchronous oscillation restraining devices.By the operation conditions for analyzing each transmission line of electricity, and then unified dispatching distribution is carried out to the output of the sub-synchronous oscillation restraining device of each new energy electric field, can accurately and more targetedly the sub-synchronous oscillation of each circuit is inhibited, specific aim inhibition is carried out to each new energy electric field, inhibition is more preferable.
Description
Technical field
The present invention relates to field of new energy technologies, and in particular to a kind of distributed sub-synchronous oscillation suppression system and new energy
Source transmission system.
Background technology
Fast development based on generation of electricity by new energy, China have become the state that wind capacity integrated into grid is maximum and photovoltaic is with fastest developing speed
Family.However as the large-scale grid connection of the new energy such as wind-powered electricity generation, other than incident great economic benefit, electric system is also given
Safe and stable operation bring new problem.It is found that obviously in multiple wind power bases such as the northwests, North China, northeast in China
Sub-synchronous oscillation phenomenon.Sub-synchronous oscillation has become the major issue that the safe efficient operation of Chinese large-sized new energy faces.
Typical sub-synchronous oscillation restraining device is broadly divided into parallel connection type sub-synchronous oscillation restraining device and tandem type at present
Two class of sub-synchronous oscillation restraining device has obtained excellent effect in terms of inhibiting thermoelectricity sub-synchronous oscillation.
But due to the subsynchronous inhibition oscillation device of existing new energy, often concentrates and be fixed on mains side or power transmission line
Lu Zhong inhibits the sub-synchronous oscillation concentration of all circuits, however, the operation conditions due to each new energy electric field exists
The case where larger difference, the distributed new grid-connected sub-synchronous oscillation brought, is complex, subsynchronous is shaken using existing
Swing suppression technology it is grid-connected to distributed new electric field after sub-synchronous oscillation carry out concentrated restraining, also need to consider on grid-connected circuit
Subsynchronous inhibition signal the case where distributing to each new energy electric field, since what different new energy electric fields generated subsynchronous shaking
The amplitude and frequency swung are possible to different, after grid-connected, sub-synchronous oscillation complex, centralization are caused to inhibit to lead
Cause many sub-synchronous oscillation signals that can not be suppressed, it is undesirable so as to cause inhibition.
Invention content
The technical problem to be solved in the present invention be how to improve distributed new electric field it is grid-connected bring subsynchronous shake
The inhibition swung.
An embodiment of the present invention provides a kind of distributed sub-synchronous oscillation suppression systems, for distributed new electric field
Sub-synchronous oscillation inhibited, including：Multiple sub-synchronous oscillation restraining devices, it is corresponding respectively to be mounted on multiple new energy electric fields
Leading-out terminal and bus rod between transmission line of electricity on, for acquiring the electric signal on transmission line of electricity, and according to electric signal point
The other sub-synchronous oscillation to multiple new energy electric fields inhibits；Control device, respectively with multiple sub-synchronous oscillation restraining devices
Communication, for distributing control signal according to electric signal output, to distribute the output situation of multiple sub-synchronous oscillation restraining devices.
Optionally, control device is additionally operable to be adjusted according to the capacity of electric signal and sub-synchronous oscillation restraining device multiple
The trend of the transmission line of electricity of new energy electric field.
Optionally, distributed sub-synchronous oscillation suppression system further includes：Communication device, respectively with control device and subsynchronous
Vibration suppression device connects.
Optionally, multiple sub-synchronous oscillation restraining devices carry out local interconnection by communication device.
Optionally, multiple sub-synchronous oscillations of connecting on the transmission line of electricity of the leading-out terminal of same new energy electric field inhibit dress
It sets；Control device is used to, according to electric signal, start multiple sub-synchronous oscillation restraining devices one by one.
Optionally, sub-synchronous oscillation restraining device further includes：Signal collecting device is connect with transmission line of electricity, for acquiring
Transmission line of electricity power on signal, and sub-synchronous oscillation signal is extracted in electric signal；Control device is connect with signal collecting device,
For according to sub-synchronous oscillation signal delivery valve control signal；Transverter is connect with control device, for being exported according to valve control signal
Corresponding subsynchronous impedance signal；Transformer, the first side winding series connection access transmission line of electricity of transformer, the secondary side of transformer
The ac output end of winding and transverter connects, subsynchronous for being injected into transmission line of electricity according to sub-synchronous oscillation impedance signal
Oscillatory impedance voltage.
Optionally, transverter includes：H bridge transverters.
Optionally, H bridges transverter includes bridge-type H bridges transverter or semi-bridge type H bridge transverters.
Optionally, signal collecting device includes：Signal gathering unit is connect with transmission line of electricity, for acquiring transmission line of electricity
In electric signal；Filter is connect with signal gathering unit, and sub-synchronous oscillation signal is obtained for being filtered to electric signal；
Phase compensation unit is connect with filter, for carrying out phase compensation to sub-synchronous oscillation signal.
Optionally, sub-synchronous oscillation restraining device further includes：By-pass switch, be arranged in parallel transverter and transformer it
Between, for controlling corresponding sub-synchronous oscillation restraining device input or exiting.
According to second aspect, an embodiment of the present invention provides a kind of new energy transmission systems, including：Above-mentioned first aspect is appointed
The distributed sub-synchronous oscillation suppression system of one description of meaning；Multiple distributed new electric fields；Bus rod, it is each for collecting
The transmission line of electricity of the leading-out terminal of a distributed new electric field.
Distribution sub-synchronous oscillation suppression system and new energy transmission system provided in an embodiment of the present invention, sub-synchronous oscillation
Restraining device is separately mounted in the submitting circuit of each new energy electric field, and transmission line of electricity is acquired by sub-synchronous oscillation restraining device
On electric signal, and the sub-synchronous oscillation of multiple new energy electric fields is inhibited respectively according to electric signal, and electric signal is sent out
It send to control device, control device analyzes the fortune of each transmission line of electricity according to the collected electric signal of each signal collecting device
Row situation, and then carry out unified dispatching distribution to the output of the sub-synchronous oscillation restraining device on each transmission line of electricity, can be with
Accurately and more targetedly the trend of each circuit is compensated, not only flexibility ratio is high, but also to each new energy
The sub-synchronous oscillation of source electric field is targetedly inhibited, and the inhibition frequency range of sub-synchronous oscillation, inhibition can be increased
More preferably.
Description of the drawings
Fig. 1 shows the schematic diagram of distributed sub-synchronous oscillation suppression system in the embodiment of the present invention；
Fig. 2 shows another distribution sub-synchronous oscillation suppression system schematic diagrames in the embodiment of the present invention；
Fig. 3 shows another distribution sub-synchronous oscillation suppression system schematic diagram in the embodiment of the present invention；
Fig. 4 shows communication device control logic schematic diagram in the embodiment of the present invention；
Fig. 5 shows another communication device control logic schematic diagram in the embodiment of the present invention；
Fig. 6 shows the schematic diagram of the new energy transmission system in the embodiment of the present invention.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply relative importance.
An embodiment of the present invention provides a kind of distributed sub-synchronous oscillation suppression systems, for distributed new electric field
Sub-synchronous oscillation inhibited, as shown in Figure 1, the system includes：
Multiple sub-synchronous oscillation restraining devices 10, the corresponding leading-out terminal mounted on multiple new energy electric fields and confluence are female respectively
On transmission line of electricity 1 between line, for inhibiting respectively to the sub-synchronous oscillation of multiple new energy electric fields；Sub-synchronous oscillation presses down
Device 10 processed includes signal collecting device 11, is connect with transmission line of electricity 1, for acquiring 1 power on signal of transmission line of electricity；Control device
20, it is communicated respectively with multiple sub-synchronous oscillation restraining devices 10, it is more to distribute for distributing control signal according to electric signal output
The output situation of a sub-synchronous oscillation restraining device 10.
In the present embodiment, distributed new energy electric field reaches bus rod through respective transmission line of electricity and is collected,
Outlet circuit is sent into receiving-end system after long distance powedr transmission.Sub-synchronous oscillation restraining device is separately mounted to each new energy electric field
Leading-out terminal and bus rod between transmission line of electricity on, acquired by signal collecting device in sub-synchronous oscillation restraining device
Electric signal in corresponding transmission line of electricity, and it is sent to control device, control device is collected according to each signal collecting device
Electric signal, analyze the operation conditions of each new energy electric field, and then dress is inhibited to the sub-synchronous oscillation on each transmission line of electricity
The output set carries out unified dispatching distribution, can accurately and more targetedly be carried out to the trend of each circuit
It targetedly compensates, not only flexibility ratio is high, but also is targetedly inhibited to the sub-synchronous oscillation of each new energy electric field, can be with
Increase the inhibition frequency range of sub-synchronous oscillation, inhibition is more preferable.
In the present embodiment, control device 20 is additionally operable to the output energy according to electric signal and sub-synchronous oscillation restraining device 10
Power adjusts the trend of the transmission line of electricity of multiple new energy electric fields.In the particular embodiment, control device 20 can obtain each
The electric signal and installed capacity information for the transmission line of electricity 1 that sub-synchronous oscillation restraining device 10 is sent, in conjunction with each transmission line of electricity 1
And the demand of new energy transmission system, regulating command is exported according to optimal load flow principle, each sub-synchronous oscillation is controlled and inhibits
The output situation of device 10, and then adjusting circuit trend.When sub-synchronous oscillation occurs, 11 collected electricity of signal collecting device
Include sub-synchronous oscillation signal in signal, control device 20 is believed after receiving sub-synchronous oscillation signal according to sub-synchronous oscillation
The capacity of number attribute (frequency, amplitude and distribution situation) and secondary same vibration suppression device inhibits to fill to each sub-synchronous oscillation
It sets 10 unified distribution power flowcontrols and contributes and inhibit to contribute with sub-synchronous oscillation.
In an alternate embodiment of the invention, as shown in Fig. 2, sub-synchronous oscillation restraining device 10 may include signal collecting device
11, it is connect with transmission line of electricity 1, for acquiring 1 power on signal of transmission line of electricity, and extracts sub-synchronous oscillation signal in electric signal；
Control device 12 is connect with signal collecting device 11 respectively, for according to sub-synchronous oscillation signal delivery valve control signal；Transverter
13, it is connect with control device 12, for exporting corresponding subsynchronous impedance signal according to valve control signal；Transformer 14, transformer
14 first side winding series connection access transmission line of electricity 1, the secondary side winding of transformer 14 connect with the ac output end of transverter 13
It connects, for injecting sub-synchronous oscillation impedance voltage into transmission line of electricity 1 according to sub-synchronous oscillation impedance signal.In the present embodiment
In, alleged valve control signal can power electronic devices switchs in transverter in order to control pulse switch signal.
Specifically, signal collecting device 11 may include：Signal gathering unit 111, for acquiring the electricity in transmission line of electricity 1
Signal.Wherein, signal gathering unit 111 may include at least one in voltage transformer, current transformer and power transformer
Kind.Acquire at least one of current signal, voltage signal or the power signal in transmission line of electricity 1.Due to new energy electric field
Electricity frequency range is wider, and frequency is not single, therefore the sub-synchronous oscillation signal band generated is wider, using filter
112 pairs of electric signals are filtered, and obtain sub-synchronous oscillation signal, in the present embodiment, band filter may be used.Phase
Position compensating unit 113, for being compensated to sub-synchronous oscillation signal.Specifically, being illustrated by taking electric current as an example, collect defeated
Three-phase current in electric line 1 obtains the electric current under d-q axis coordinate systems by coordinate transform, power transmission line is obtained by phaselocked loop
The phase of electric current on road 1 is carried out according to the current draw sub-synchronous oscillation electric current after coordinate transform and to secondary same oscillating current
Phase compensation finally obtains the sub-synchronous oscillation signal on transmission line of electricity 1.
Alleged valve control signal in order to control in transverter the opening and closing of electron electric power switch signal, specifically, control device 12 can
It is opened and closed for example, IGBT with generating pulse switch signal according to sub-synchronous oscillation signal and then controlling the power electronics in transverter 13
Open, and then obtain sub-synchronous oscillation impedance signal.
The sub-synchronous oscillation impedance signal is injected transmission line of electricity 1 by transformer 14 in the form of sub-synchronous oscillation impedance voltage
In, to inhibit the sub-synchronous oscillation in transmission line of electricity 1.In the present embodiment, the first side winding series connection access of transformer 14
The secondary side winding of transmission line of electricity, transformer 14 is connect with the ac output end of transverter 13, due to shaking to distribution is subsynchronous
Restraining device 10 is swung to inhibit the sub-synchronous oscillation of single new energy electric field, thus transformer 14 may be used it is more light
Transformer, the transformer can mount on the line, for example, spiral-lock transformer may be used.
In an alternate embodiment of the invention, as shown in figure 3, distributed sub-synchronous oscillation suppression system can also include communication device
30, which can be separately positioned on 10 side of 20 side of control device and sub-synchronous oscillation restraining device, make secondary same
Step vibration suppression device 10 is communicated with control device 20, and in the present embodiment, wireless communication may be used in communication device 30, also may be used
To use wire communication.In the present embodiment, to reduce cost, wireless communication may be used.In the particular embodiment, secondary
10 side of synchronized oscillation restraining device, a communication device 30 can connect with the sub-synchronous oscillation device on multiple transmission lines of electricity 1
It connects, for example, communication device control logic schematic diagram shown in Fig. 4, in the present embodiment, each sub-synchronous oscillation restraining device
Between can also be communicated by communication device 30, using local interconnection, control device 20 can be believed according to sub-synchronous oscillation
Number, start sub-synchronous oscillation device one by one, until inhibiting sub-synchronous oscillation enough.
Sub-synchronous oscillation such as transmission line of electricity 1 is more serious, and corresponding sub-synchronous oscillation restraining device may be caused to inhibit
Scarce capacity, to guarantee preferably to inhibit the sub-synchronous oscillation on the transmission line of electricity.In an alternate embodiment of the invention, such as Fig. 5
Shown in communication device control logic schematic diagram, can connect multiple sub-synchronous oscillation restraining devices on same transmission line of electricity 1
10, communication device 30 may be multiple, be connected between multiple concatenated sub-synchronous oscillation restraining devices 10, Ge Geci
It is communicated between synchronized oscillation restraining device 10, when sub-synchronous oscillation occurs, control device 20 can control one of them
Sub-synchronous oscillation restraining device 10 starts, other sub-synchronous oscillation restraining devices 10 can be state to be launched.The device most
After big sub-synchronous oscillation inhibits function to contribute, put by communication device 30 and the latter sub-synchronous oscillation restraining device 10, directly
The sub-synchronous oscillation on the transmission line of electricity 1 can extremely be completely inhibited.
In an alternate embodiment of the invention, transverter 13 can be H bridge transverters, specifically, can be list H bridge transverters,
The carry out sub-synchronous oscillation inhibition for the property being directed to due to more single new energy electric fields in the present embodiment, single IGBT device is pressure-resistant, resistance to
Stream ability is fully able to meet the requirements, without the main circuit structure of the complexity such as such as multiplex, more level.It can make subsynchronous
Vibration suppression device 10 is simple in structure, light-weight, is conducive to directly be mounted on transmission line of electricity 1, secondary same compared to centralization
Step vibration suppression device can save a large amount of land resource.In the present embodiment, bridge-type H bridges may be used in H bridges transverter
Transverter can also use semi-bridge type H bridge transverters.In the present embodiment, the cascade compact change of current of more H bridges can also be used
Device.More cascade compact transverters of H bridges can also meet simple in structure, light-weight requirement, to be directly mounted on transmission of electricity
On circuit 1.
For convenience of it is subsynchronous inhibit equipment input with exit, in an alternate embodiment of the invention, as shown in Figures 2 and 3, changing
By-pass switch BRK is arranged in parallel between stream device 13 and transformer 14, sub-synchronous oscillation restraining device 10 has input and exits
Two states, specifically, by-pass switch BRK is arranged in parallel between transverter 13 and transformer 14, transformer can be button
Transformer is filled, when by-pass switch BRK is disconnected, sub-synchronous oscillation restraining device 10 is input state, is closed in by-pass switch BRK
When, sub-synchronous oscillation restraining device 10 is to exit state.By-pass switch BRK includes mechanical switch and electronic power switch or simultaneously
The mechanical switch and electronic power switch of connection have switch off current and long closure service ability.In the present embodiment, by-pass switch
BRK can be connect with control device 20, and the open and close of by-pass switch is controlled by control device 20.By-pass switch BRK
It can be connect with control device 12, closure or the disconnection of by-pass switch are controlled by control device.Such as sub-synchronous oscillation restraining device
10 needs are out of service, and control device 20 or control device 12 can pass through the control signal that output control switch is closed and control side
Way switch BRK is closed.In the present embodiment, the electricity that control device 20 or control device 12 can be acquired according to signal collecting device
Signal controls by-pass switch BRK, for example, when collecting sub-synchronous oscillation signal, control switch disconnects, subsynchronous to shake
It swings restraining device 10 to put into operation, when collected electric signal is transmission system stable operation signal, switch can be controlled and be closed,
Keep sub-synchronous oscillation restraining device 10 out of service.In the present embodiment, control device 20 can regulate and control control device 12 in turn
Control by-pass switch is opened or closed.
The embodiment of the present invention additionally provides a kind of new energy transmission system, as shown in fig. 6, including multiple distributed news
Electric field 100, bus rod 200, the transmission line of electricity of the leading-out terminal for collecting each distributed new electric field；In multiple distributions
The distribution of above-described embodiment description is separately installed on transmission line of electricity between formula new energy electric field 100 and bus rod 200
Sub-synchronous oscillation restraining device 300.Receiving end 400 is connected on the circuit of the leading-out terminal of bus rod.In the present embodiment,
New energy electric field may include wind power plant and photovoltaic DC field.
The new energy electric field respectively disperseed reaches bus rod, the circuit of the leading-out terminal of bus rod through respective transmission line of electricity
Receiving-end system is sent into after long distance powedr transmission.Sub-synchronous oscillation restraining device is separately mounted to the submitting circuit of each new energy
In, the electric signal in corresponding transmission line of electricity is acquired by the signal collecting device in sub-synchronous oscillation restraining device, and send
To control device, control device analyzes the operation of each transmission line of electricity according to the collected electric signal of each signal collecting device
Situation, and then carry out unified dispatching distribution to the output of the sub-synchronous oscillation restraining device on each transmission line of electricity, can be compared with
More targetedly to compensate accurately and to the trend of each circuit, not only flexibility ratio is high, but also to each new energy
The sub-synchronous oscillation of electric field is targetedly inhibited, and the range of the inhibition frequency of sub-synchronous oscillation, inhibition can be increased
More preferably.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations can be made in the case of bright spirit and scope, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (11)
1. a kind of distribution sub-synchronous oscillation suppression system, presses down for the sub-synchronous oscillation to distributed new electric field
System, which is characterized in that including：
Multiple sub-synchronous oscillation restraining devices, it is corresponding between the leading-out terminal and bus rod of multiple new energy electric fields respectively
Transmission line of electricity on, for acquiring the electric signal on the transmission line of electricity, and according to the electric signal respectively to the multiple new
The sub-synchronous oscillation of energy electric field is inhibited；
Control device is communicated with the multiple sub-synchronous oscillation restraining device respectively, for being distributed according to the electric signal output
Signal is controlled, to distribute the output situation of the multiple sub-synchronous oscillation restraining device.
2. distribution sub-synchronous oscillation suppression system as described in claim 1, which is characterized in that
The control device is additionally operable to be adjusted according to the capacity of the electric signal and the sub-synchronous oscillation restraining device more
The trend of the transmission line of electricity of a new energy electric field.
3. distribution sub-synchronous oscillation suppression system as described in claim 1, which is characterized in that further include：
Communication device is connect with the control device and the sub-synchronous oscillation restraining device respectively.
4. distribution sub-synchronous oscillation suppression system as claimed in claim 3, which is characterized in that the multiple sub-synchronous oscillation
Restraining device carries out local interconnection by the communication device.
5. distribution sub-synchronous oscillation suppression system as claimed in claim 3, which is characterized in that
It connects on the transmission line of electricity of the leading-out terminal of same new energy electric field multiple sub-synchronous oscillation restraining devices；
The control device is used to, according to the electric signal, start the multiple sub-synchronous oscillation restraining device one by one.
6. the distributed sub-synchronous oscillation suppression system as described in claim 1-5 any one, which is characterized in that described time same
Walking vibration suppression device further includes：
Signal collecting device is connect with the transmission line of electricity, for acquiring the transmission line of electricity power on signal, and in the telecommunications
Sub-synchronous oscillation signal is extracted in number；
Control device is connect with the signal collecting device, for according to the sub-synchronous oscillation signal delivery valve control signal；
Transverter is connect with the control device, for exporting corresponding subsynchronous impedance signal according to the valve control signal；
The first side winding series connection of transformer, the transformer accesses the transmission line of electricity, the secondary side winding of the transformer
It is connect with the ac output end of the transverter, for being noted into the transmission line of electricity according to the sub-synchronous oscillation impedance signal
Enter sub-synchronous oscillation impedance voltage.
7. distribution sub-synchronous oscillation suppression system as claimed in claim 6, which is characterized in that the transverter includes：H bridges
Transverter.
8. distribution sub-synchronous oscillation suppression system as claimed in claim 6, which is characterized in that the H bridges transverter includes
Bridge-type H bridges transverter or semi-bridge type H bridge transverters.
9. the distributed sub-synchronous oscillation suppression system as described in claim 1-5 any one, which is characterized in that the signal
Collecting device includes：
Signal gathering unit is connect with the transmission line of electricity, for acquiring the electric signal in transmission line of electricity；
Filter is connect with the signal gathering unit, and sub-synchronous oscillation signal is obtained for being filtered to the electric signal；
Phase compensation unit is connect with the filter, for carrying out phase compensation to the sub-synchronous oscillation signal.
10. the distributed sub-synchronous oscillation suppression system as described in claim 1-5 any one, which is characterized in that described time
Synchronized oscillation restraining device further includes：
By-pass switch is arranged in parallel between the transverter and the transformer, for controlling corresponding described subsynchronous shake
It swings restraining device input or exits.
11. a kind of new energy transmission system, which is characterized in that including：
Distributed sub-synchronous oscillation suppression system as described in claim 1-10 any one；
Multiple distributed new electric fields；
Bus rod, the transmission line of electricity of the leading-out terminal for collecting each distributed new electric field.
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| CN201810434128.7A CN108711872B (en) | 2018-05-08 | 2018-05-08 | Distributed subsynchronous oscillation suppression system and new energy power transmission system |
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| CN208939597U (en) * | 2018-05-08 | 2019-06-04 | 全球能源互联网研究院有限公司 | Distributed sub-synchronous oscillation inhibits system and new energy transmission system |
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2018
- 2018-05-08 CN CN201810434128.7A patent/CN108711872B/en active Active
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