CN106130038A - The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base goes out through string by-carriage - Google Patents
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base goes out through string by-carriage Download PDFInfo
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- CN106130038A CN106130038A CN201610467169.7A CN201610467169A CN106130038A CN 106130038 A CN106130038 A CN 106130038A CN 201610467169 A CN201610467169 A CN 201610467169A CN 106130038 A CN106130038 A CN 106130038A
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- 230000010355 oscillation Effects 0.000 title claims abstract description 32
- 230000000452 restraining effect Effects 0.000 title claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 56
- 230000005611 electricity Effects 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 230000008901 benefit Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 2
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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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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
- H02J3/1814—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators wherein al least one reactive element is actively controlled by a bridge converter, e.g. unified power flow controllers [UPFC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides the grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base goes out through string by-carriage, including signal extraction module, signal processing module and voltage source converter；Signal extraction module, signal processing module and voltage source converter are sequentially connected with；The input of signal extraction module is connected to collecting station and going here and there between benefit transmitting system of generation of electricity by new energy base；The outfan of voltage source converter is connected with the described power transmission line of sending outside collecting station.Compared with prior art, the grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base that the present invention provides goes out through string by-carriage, can avoid large-scale new forms of energy wind power base after string by-carriage goes out system grid connection, the a large amount of blower fan off-grids caused due to sub-synchronous oscillation, thus ensure that the safety and stablization that new forms of energy electric power is sent are run.
Description
Technical field
The present invention relates to power electronics and electrical equipment technical field, be specifically related to one and mend through string towards new forms of energy base
The grid side sub-synchronous oscillation restraining device of transmitting system.
Background technology
Fast development based on generation of electricity by new energy, China has become the state that wind capacity integrated into grid is maximum and photovoltaic is with fastest developing speed
Family.But being contrary distribution owing to China exists wind/light resources with load center, how generation of electricity by new energy technology faces
Realize the challenge of Large Copacity, long-distance sand transport.Series capacitor compensation technology is currently mainly used to realize the Large Copacity of electric energy with remote
Distance conveying, but extensive generation of electricity by new energy easily causes electrical network sub-synchronous oscillation when string is mended and accessed electrical network.Such as, 2009
Year texas,U.S there occurs that the first new forms of energy mend the sub-synchronous oscillation accident accessing electrical network through string in the world, cause separated motor group to set
Standby damage；The new forms of energy of 2010 area, China Guyuans, Zhangjiakou there occurs tens of Wind turbines and string after string is mended and accessed electrical network
Mend the sub-synchronous oscillation fault caused, cause grid equipment operation exception and a large amount of blower fan off-grid, the safety of serious threat electrical network
Stable operation.
Summary of the invention
Mend, through string, the sub-synchronous oscillation fault that access electrical network causes for new forms of energy in prior art, the invention provides one
Plant the grid side sub-synchronous oscillation restraining device that new forms of energy base goes out through string by-carriage.
The technical scheme is that
Described device includes signal extraction module, signal processing module and voltage source converter；
Described signal extraction module, signal processing module and voltage source converter are sequentially connected with；
The input of described signal extraction module be connected to generation of electricity by new energy base collect station with string mend transmitting system it
Between；
The outfan of described voltage source converter is connected with the described power transmission line of sending outside collecting station.
The optimal technical scheme that the present invention further provides is: the input of described signal extraction module includes two
Road:
Article one, collect station described in the access of described branch road and string mends the transmission line of electricity between transmitting system, another described branch road
The bus between station and voltage source converter is collected described in access.
The optimal technical scheme that the present invention further provides is: described signal extraction module includes signal gathering unit and letter
Number extraction unit；
Described signal gathering unit, collects station described in collection and string mends the voltage u of transmission line of electricity between transmitting systemSAnd electricity
Stream iS, and described in collection, collect the electric current i of bus between station and voltage source converterL；
Described signal extraction unit, according to described electric current iSWith electric current iLDetermine subsynchronous current signal.
The optimal technical scheme that the present invention further provides is: described signal extraction unit is according to electric current iSWith electric current iLReally
Fixed subsynchronous current signal includes:
The electric current i of bus between station and voltage source converter is collected to describedLCarry out coordinate transform to obtain under d-q coordinate system
Electric current iLdWith electric current iLq；
Collect station described in acquisition and string mends the electric current i of transmission line of electricity between transmitting systemSPhase thetap；
Extract described electric current iLdSubsynchronous electric current iLd_subWith described electric current iLqSubsynchronous electric current iLq_sub, and to institute
State subsynchronous electric current iLd_subAnd iLq_subCarry out phase compensation.
The optimal technical scheme that the present invention further provides is: described signal processing module includes that compensated reference signal calculates
Unit and pulse modulation unit；
Described compensated reference signal computing unit, receives the output signal of described signal extraction unit, believes according to this output
The compensated reference signal at station is collected described in number calculating；
Described pulse modulation unit, generates according to described compensated reference signal and triggers pulse, and send it to described electricity
Source Con-verters；Described voltage source converter, carries out Power Exchange to suppress subsynchronous shaking for mending transmitting system with described string
Swing.
The optimal technical scheme that the present invention further provides is: described compensated reference signal computing unit includes a PI control
Device processed, the 2nd PI controller, the 3rd PI controller and signal varitron unit；
One input of a described PI controller, the 2nd PI controller and signal varitron unit is sequentially connected with, institute
State the 3rd PI controller to be connected with another input of signal varitron unit, the outfan of described signal varitron unit with
Described voltage source converter connects.
The optimal technical scheme that the present invention further provides is:
A described PI controller, carries out PI control to DC deviation signal；
Described 2nd PI controller, carries out PI control to the deviation signal of the first comparator output；Described first comparator
Positive input terminal receive the output signal of a described PI controller and the subsynchronous electricity of described signal extraction module output respectively
Stream iLd_sub, negative input end receives the electric current i of described signal extraction module outputSd；
Described 3rd PI controller, carries out PI control to the deviation signal of the second comparator output；Described second comparator
Positive input terminal receive respectively described signal extraction module output subsynchronous electric current iLq_subWith reactive current setting value iqref,
Negative input end receives the electric current i of described signal extraction module outputSq；
Wherein, described electric current iSdWith electric current iSqThe electric current i of transmission line of electricity between transmitting system is mended for collecting station and stringSAt d-
Electric current under q coordinate system.
The optimal technical scheme that the present invention further provides is: described signal varitron unit include the 3rd comparator,
Four comparators and coordinate transform subelement；
The positive input terminal of described 3rd comparator receives the voltage u of described signal extraction module output respectivelySdAnd electric current
iSd, negative input end receives the output signal of described 2nd PI controller；
The positive input terminal of described 4th comparator receives the voltage u of described signal extraction module output respectivelySqAnd electric current
iSq, negative input end receives the output signal of described 3rd PI controller；
Described coordinate transform subelement, carries out coordinate to the output signal of described 3rd comparator and the 4th comparator and turns
Change, obtain the voltage u under abc coordinatema, voltage umbWith voltage umc；
Wherein, described electric current iSdWith electric current iSqThe electric current i of transmission line of electricity between transmitting system is mended for collecting station and stringSAt d-
Electric current under q coordinate system；Described voltage uSdWith voltage uSqVoltage u for described transmission line of electricitySVoltage under d-q coordinate system.
The optimal technical scheme that the present invention further provides is:
Described generation of electricity by new energy base includes wind-power electricity generation base and/or photovoltaic generation base；
Described string is mended transmitting system and is included series compensation device, its be arranged on described in collect the sending outside on power transmission line of station.
Compared with immediate prior art, the invention has the beneficial effects as follows:
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base that the present invention provides goes out through string by-carriage, can keep away
After exempting from large-scale new forms of energy wind power base by-carriage going out system grid connection through string, a large amount of blower fan off-grids caused due to sub-synchronous oscillation, from
And ensure that the safety and stablization that new forms of energy electric power is sent are run.
Accompanying drawing explanation
Fig. 1: the grid side sub-synchronous oscillation restraining device that in the embodiment of the present invention, a kind of new forms of energy base goes out through string by-carriage
Schematic diagram；
Fig. 2: the grid side sub-synchronous oscillation suppression that in the embodiment of the present invention, wind-power electricity generation base goes out four days through string by-carriage is shown
It is intended to；
Fig. 3: signal extraction module principle schematic diagram in the embodiment of the present invention；
Fig. 4: signal processing module principle schematic in the embodiment of the present invention；
Wherein, 101: signal extraction module；102: signal processing module；1021: the one PI controllers；1022: the two PI
Controller；1023: the three PI controllers；1024: the first comparators；1025: the three comparators；1026: the second comparators；
1027: the four comparators；1028: coordinate transform subelement；103: voltage source converter；201: wind-power electricity generation base；202: converge
Collection station；203: string mends transmitting system.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely illustrated, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Combine accompanying drawing separately below, the grid side that a kind of new forms of energy base providing the embodiment of the present invention goes out through string by-carriage
Sub-synchronous oscillation restraining device illustrates.
Fig. 1 is the grid side sub-synchronous oscillation restraining device that in the embodiment of the present invention, a kind of new forms of energy base goes out through string by-carriage
Schematic diagram, as it can be seen, sub-synchronous oscillation restraining device includes signal extraction module 101, signal processing module in the present embodiment
102 and voltage source converter 103.Wherein,
Signal extraction module 101, signal processing module 102 and voltage source converter 103 are sequentially connected with, signal extraction module
The input of 101 be connected to generation of electricity by new energy base collect station and string is mended between transmitting system, voltage source converter 103 defeated
Go out end to be connected with the power transmission line of sending outside collecting station.
The most respectively signal extraction module 101 and signal processing module 102 are specifically described.
1, signal extraction module 101
The input of the present embodiment signal extraction module 101 is connected to the station of collecting in generation of electricity by new energy base and goes out with string by-carriage
Between system it is: the input of signal extraction module 101 includes that two branch roads, a branch road access collecting to stand to go out with string by-carriage and is
Transmission line of electricity between system, another branch road accesses the bus collected between station and voltage source converter, voltage source converter, uses
Power Exchange is carried out to suppress sub-synchronous oscillation in mending transmitting system with string.
In the present embodiment, signal extraction module 101 includes signal gathering unit and signal extraction unit.Wherein,
(1) signal gathering unit
Signal gathering unit, collects the voltage u of transmission line of electricity between station and string benefit transmitting system for gatheringSWith electric current iS,
And collection collects the electric current i of bus between station and voltage source converterL。
(2) signal extraction unit
Signal extraction unit, according to electric current iSWith electric current iLDetermine subsynchronous current signal.Particularly as follows:
To collecting the electric current i of bus between station and voltage source converter 103LCarry out coordinate transform to obtain under d-q coordinate system
Electric current iLdWith electric current iLq；To collecting station and string is mended the voltage and current of power transmission line between transmitting system and carried out coordinate transform and obtain
Voltage and current under d-q coordinate system；
Obtain and collect the electric current i of transmission line of electricity between station and string benefit transmitting systemSPhase thetap；
Extract electric current iLdSubsynchronous electric current iLd_subWith electric current iLqSubsynchronous electric current iLq_sub, and to subsynchronous electric current
iLd_subAnd iLq_subCarry out phase compensation.
Fig. 3 is signal extraction module principle schematic diagram in the embodiment of the present invention, as it can be seen, signal extraction in the present embodiment
Unit is to collecting the three-phase current i of bus between station and voltage source converter 103La、iLbAnd iLcCarry out coordinate transform, to collecting
The voltage and current of power transmission line between benefit transmitting system of standing and go here and there carries out coordinate transform and obtains the voltage under d-q coordinate system and electricity
Flow, and collect the electric current i of transmission line of electricity between station and string benefit transmitting system by phase-locked loop pll acquisitionSPhase thetap, finally depend on
According to the electric current i after coordinate transformLdWith electric current iLq, extract electric current iLdSubsynchronous electric current iLd_subWith electric current iLqSubsynchronous electric current
iLq_sub, and to subsynchronous electric current iLd_subAnd iLq_subCarry out phase compensation.
2, signal processing module 102
In the present embodiment, signal processing module 102 includes compensated reference signal computing unit and pulse modulation unit.Wherein,
(1) compensated reference signal computing unit
Compensated reference signal computing unit, receives the output signal of signal extraction unit, calculates according to this output signal and converges
The compensated reference signal at collection station.Compensated reference signal computing unit include PI controller the 1021, a 2nd PI controller 1022,
3rd PI controller 1023 and signal varitron unit；
One input of the oneth PI controller the 1021, the 2nd PI controller 1022 and signal varitron unit sequentially connects
Connecing, the 3rd PI controller 1023 is connected with another input of signal varitron unit 1028, signal varitron unit 1028
Outfan be connected with voltage source converter 103.Wherein,
Oneth PI controller 1021, carries out PI control to DC deviation signal, and as shown in Figure 4, DC deviation signal is straight
Stream setting value udcrefWith direct current actual value udcDeviation.
2nd PI controller 1022, carries out PI control to the deviation signal of the first comparator 1024 output；First comparator
The positive input terminal of 1024 receives the output signal of a PI controller 1021 and the subsynchronous of signal extraction module 102 output respectively
Electric current iLd_sub, negative input end receives the electric current i of signal extraction module 102 outputSd。
3rd PI controller 1023, carries out PI control to the deviation signal of the second comparator 1026 output；Second comparator
The positive input terminal of 1026 receives the subsynchronous electric current i of signal extraction module 102 output respectivelyLd_subWith reactive current setting value
iqref, negative input end receives the electric current i of signal extraction module outputSq, the input signal of the i.e. second comparator 1026 is iLd_sub+
iqref-iSq。
Signal varitron unit includes the 3rd comparator the 1025, the 4th comparator 1027 and coordinate transform subelement 1028:
The positive input terminal of the 3rd comparator 1025 receives the voltage u of signal extraction module 102 output respectivelySdWith electric current iSd,
Negative input end receives output signal p of the 2nd PI controller 10222, the input signal of the i.e. the 3rd comparator 1025 is uSd+iSd-
p2。
The positive input terminal of the 4th comparator 1027 receives the voltage u of signal extraction module 102 output respectivelySqWith electric current iSq,
Negative input end receives output signal p of the 3rd PI controller 10233, the input signal of the i.e. the 4th comparator 1027 is uSq+iSq-
p3。
Coordinate transform subelement 1028, carries out coordinate to the output signal of the 3rd comparator 1025 and the 4th comparator 1027
Conversion, obtains the voltage u under abc coordinatema, voltage umbWith voltage umc；
Wherein, electric current iSdWith electric current iSqThe electric current i of transmission line of electricity between transmitting system is mended for collecting station and stringSSit at d-q
Electric current under mark system；Voltage uSdWith voltage uSqVoltage u for above-mentioned transmission line of electricitySVoltage under d-q coordinate system.
(2) pulse modulation unit
Pulse modulation unit, generates according to compensated reference signal and triggers pulse, and send it to voltage source converter
103。
Fig. 4 is signal processing module principle schematic in the embodiment of the present invention, as it can be seen, compensate reference in the present embodiment
Signature computation unit output voltage uma, voltage umbWith voltage umc, pulse modulation unit is according to voltage uma, voltage umbWith voltage umc
Generate and trigger pulse.
In the present invention, generation of electricity by new energy base includes that transmitting system is mended in wind-power electricity generation base and/or photovoltaic generation base, string
Including series compensation device, it is arranged on and collects the sending outside on power transmission line of station.As a example by wind-power electricity generation base, the present invention is provided below
The work process of sub-synchronous oscillation restraining device illustrate.Fig. 2 is that in the embodiment of the present invention, wind-power electricity generation base is mended through string
Send the grid side sub-synchronous oscillation suppression schematic diagram of four days, as it can be seen, wind-power electricity generation base includes wind-force in the present embodiment
Generating set 201, its successively with collect station 202 and string benefit transmitting system 203 be connected.One input of signal extraction module 101
Branch road is connected to collect station 202 and string is mended between transmitting system 203, and another input branch road is connected to collect station 202 and voltage
Between source inverter 103.In the present embodiment, voltage source converter 103 can use H bridge cascade structure based on full-controlled device, connects
After receiving the triggering pulse that signal processing module 102 issues, control full-controlled device switch and/or turn off, injecting to system corresponding
Electric current, and system generation Power Exchange, thus realize the suppression to sub-synchronous oscillation.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, be permissible
Instructing relevant hardware by computer program to complete, described program can be stored in a computer read/write memory medium
In, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only store-memory body (Read-Only, ROM) or random store-memory body (Random Access Memory,
RAM) etc..
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention
God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof
Within, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. the grid side sub-synchronous oscillation restraining device that a new forms of energy base goes out through string by-carriage, it is characterised in that described device
Including signal extraction module, signal processing module and voltage source converter；
Described signal extraction module, signal processing module and voltage source converter are sequentially connected with；
The input of described signal extraction module is connected to collecting station and going here and there between benefit transmitting system of generation of electricity by new energy base；
The outfan of described voltage source converter is connected with the described power transmission line of sending outside collecting station.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 1 goes out through string by-carriage, its
Being characterised by, the input of described signal extraction module includes two branch roads:
Article one, collecting station described in the access of described branch road and string mends the transmission line of electricity between transmitting system, another described branch road accesses
The described bus collected between station and voltage source converter.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 1 goes out through string by-carriage, its
Being characterised by, described signal extraction module includes signal gathering unit and signal extraction unit；
Described signal gathering unit, collects station described in collection and string mends the voltage u of transmission line of electricity between transmitting systemSWith electric current iS,
And described in gathering, collect the electric current i of bus between station and voltage source converterL；
Described signal extraction unit, according to described electric current iSWith electric current iLDetermine subsynchronous current signal.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 3 goes out through string by-carriage, its
Being characterised by, described signal extraction unit is according to electric current iSWith electric current iLDetermine that subsynchronous current signal includes:
The electric current i of bus between station and voltage source converter is collected to describedLCarry out coordinate transform and obtain the electricity under d-q coordinate system
Stream iLdWith electric current iLq；
Collect station described in acquisition and string mends the electric current i of transmission line of electricity between transmitting systemSPhase thetap；
Extract described electric current iLdSubsynchronous electric current iLd_subWith described electric current iLqSubsynchronous electric current iLq_sub, and same to described time
Step electric current iLd_subAnd iLq_subCarry out phase compensation.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 1 goes out through string by-carriage, its
Being characterised by, described signal processing module includes compensated reference signal computing unit and pulse modulation unit；
Described compensated reference signal computing unit, receives the output signal of described signal extraction unit, according to this output signal meter
The compensated reference signal at station is collected described in calculation；
Described pulse modulation unit, generates according to described compensated reference signal and triggers pulse, and send it to described voltage source
Inverter；Described voltage source converter, carries out Power Exchange to suppress sub-synchronous oscillation for mending transmitting system with described string.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 5 goes out through string by-carriage, its
Be characterised by, described compensated reference signal computing unit include a PI controller, the 2nd PI controller, the 3rd PI controller and
Signal varitron unit；
One input of a described PI controller, the 2nd PI controller and signal varitron unit is sequentially connected with, and described
Three PI controllers are connected with another input of signal varitron unit, and the outfan of described signal varitron unit is with described
Voltage source converter connects.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 6 goes out through string by-carriage, its
It is characterised by,
A described PI controller, carries out PI control to DC deviation signal；
Described 2nd PI controller, carries out PI control to the deviation signal of the first comparator output；Described first comparator is just
Input receives output signal and the subsynchronous electric current of described signal extraction module output of a described PI controller respectively
iLd_sub, negative input end receives the electric current i of described signal extraction module outputSd；
Described 3rd PI controller, carries out PI control to the deviation signal of the second comparator output；Described second comparator is just
Input receives the subsynchronous electric current i of described signal extraction module output respectivelyLq_subWith reactive current setting value iqref, negative defeated
Enter end and receive the electric current i of described signal extraction module outputSq；
Wherein, described electric current iSdWith electric current iSqThe electric current i of transmission line of electricity between transmitting system is mended for collecting station and stringSSit at d-q
Electric current under mark system.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 6 goes out through string by-carriage, its
Being characterised by, described signal varitron unit includes the 3rd comparator, the 4th comparator and coordinate transform subelement；
The positive input terminal of described 3rd comparator receives the voltage u of described signal extraction module output respectivelySdWith electric current iSd, negative defeated
Enter end and receive the output signal of described 2nd PI controller；
The positive input terminal of described 4th comparator receives the voltage u of described signal extraction module output respectivelySqWith electric current iSq, negative defeated
Enter end and receive the output signal of described 3rd PI controller；
Described coordinate transform subelement, carries out Coordinate Conversion to the output signal of described 3rd comparator and the 4th comparator,
Voltage u under abc coordinatema, voltage umbWith voltage umc；
Wherein, described electric current iSdWith electric current iSqThe electric current i of transmission line of electricity between transmitting system is mended for collecting station and stringSSit at d-q
Electric current under mark system；Described voltage uSdWith voltage uSqVoltage u for described transmission line of electricitySVoltage under d-q coordinate system.
The grid side sub-synchronous oscillation restraining device that a kind of new forms of energy base the most as claimed in claim 1 goes out through string by-carriage, its
It is characterised by,
Described generation of electricity by new energy base includes wind-power electricity generation base and/or photovoltaic generation base；
Described string is mended transmitting system and is included series compensation device, its be arranged on described in collect the sending outside on power transmission line of station.
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| CN201610467169.7A CN106130038B (en) | 2016-06-24 | 2016-06-24 | Power grid side subsynchronous oscillation suppression device for new energy base fed through series compensation |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390399A (en) * | 2018-05-08 | 2018-08-10 | 全球能源互联网研究院有限公司 | A kind of sub-synchronous oscillation restraining device and power grid output system |
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| CN108711872B (en) * | 2018-05-08 | 2024-04-09 | 全球能源互联网研究院有限公司 | Distributed subsynchronous oscillation suppression system and new energy power transmission system |
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| CN111786405B (en) * | 2020-06-23 | 2024-04-23 | 湖南大学 | New energy power plant series compensation grid-connected system and method for restraining subsynchronous oscillation |
| CN116613784A (en) * | 2023-07-20 | 2023-08-18 | 武昌理工学院 | Wind-light power generation system subsynchronous oscillation coordination control method based on PID-DHDP |
| CN116613784B (en) * | 2023-07-20 | 2023-12-12 | 武昌理工学院 | Wind-light power generation system subsynchronous oscillation coordination control method based on PID-DHDP |
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