CN105470990B - High-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method - Google Patents
High-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method Download PDFInfo
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- CN105470990B CN105470990B CN201610013627.XA CN201610013627A CN105470990B CN 105470990 B CN105470990 B CN 105470990B CN 201610013627 A CN201610013627 A CN 201610013627A CN 105470990 B CN105470990 B CN 105470990B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- H02J3/386—
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention belongs to wind generating technology, it is related to a kind of high-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method.The system includes the full power convertor being made of generator-side converter wear and net side current transformer between wind-driven generator and power grid, and there are one Crowbar circuits for connection on the DC bus of full power convertor.The invention enables direct drive permanent magnetic wind generator systems can preferably realize protection to current transformer in grid voltage sags, and converter system can be coordinated preferably to realize low voltage crossing.
Description
Technical field
The invention belongs to wind generating technologies, are related to a kind of high-power direct drive permanent magnetic wind generator system low-voltage crossing control
System and control method processed.
Background technology
Wind-power electricity generation as new energy row is quickly grown in recent years, and installed capacity constantly increases.It installs and holds with wind-powered electricity generation
The continuous improvement of amount, wind power generating set have the Compulsory Feature that " low voltage ride-through function " has become wind power system, unsteady flow
Core component of the device as Wind turbines, it is necessary to have this function.By the basic principle of wind generator system it is found that in voltage
In falling process, system will produce high current and high voltage, it is therefore necessary to which design protection device is to prevent in converter system
Current transformer is damaged.
Compared to double-fed type motor, permanent magnet direct-drive wind turbine is suitable for low wind speed, and energy consumption is less, follow-up maintenance cost
It is low.Permanent magnet direct-drive wind turbine is China's wind-driven generator future developing trend, therefore solves the problems, such as the low voltage crossing of straight drive system
It is increasingly important.In grid voltage sags, output voltage declines direct drive permanent magnetic wind generator system, must increase output at this time
Electric current, with the power for keeping current transformer to be absorbed from wind turbine and the balance being output between grid power, but when grid collapses electricity
When pressure falls larger, with output power imbalance occurs for input, causes DC voltage to rise, at this time to main circuit of converter
Insulated gate transistor (IGBT) and capacitance threaten.
Invention content
The technical problem to be solved by the invention is to provide a kind of high-power direct drive permanent magnetic wind generator system low pressure to wear
More control system and control method so that when direct drive permanent magnetic wind generator system can be realized preferably in grid voltage sags to becoming
The protection of device is flowed, and converter system can be coordinated preferably to realize low voltage crossing.
The high-power direct drive permanent magnetic wind generator system low-voltage crossing control system of the present invention, including it is located at wind-power electricity generation
The full power convertor being made of generator-side converter wear and net side current transformer between machine and power grid, in the direct current of full power convertor
There are one Crowbar circuits for connection on busbar.
The system, which further includes one, can control Crowbar circuits and the control mould of full power convertor working condition
Block, the signal input part of control module are connected with the Voltage Drop detection device that can detect grid voltage sags.Control module
The operating mode of net side current transformer and the input of Crowbar devices are controlled according to the detection signal of Voltage Drop detection device
Or it cuts out.
The high-power direct drive permanent magnetic wind generator system low voltage ride through control method of the present invention is based on above-mentioned control system
System, this method are：When wind generator system is run, the real-time acquisition testing Voltage Drop detection device signal of control module, such as
There is not exception in fruit network voltage and DC bus-bar voltage, and control module controls current transformer normal work, generates electricity by way of merging two or more grid systems；Work as electricity
When pressure falls detection device and detects that network voltage falls and DC bus-bar voltage is excessively high, sent out immediately by control module
Go out and controls signal, triggering input Crowbar circuits, and at the same time starting the net side current transformer STATCOM moulds of full power convertor
Formula.
The positive effect of the present invention is：By the way of software and hardware combining, direct drive permanent magnetic wind generator system is realized
In grid voltage sags to the protection of current transformer, and converter system is coordinated preferably to realize low voltage crossing.In low electricity
It presses in crossing process, while starting the grid side current transformer STATCOM patterns of full power convertor, reactive power is provided to power grid
It supports, is conducive to the fast quick-recovery of electric network fault.
Description of the drawings
Fig. 1 is the systematic schematic diagram of the embodiment of the present invention；
Fig. 2 is the Crowbar circuit diagrams of the embodiment of the present invention.
Specific implementation mode
As shown in Figure 1, the high-power direct drive permanent magnetic wind generator system low-voltage crossing control system, including it is located at wind-force
The full power convertor 1 being made of generator-side converter wear and net side current transformer between generator and power grid, in full power convertor
DC bus on connection there are one Crowbar circuits 2.The system, which further includes one, can control Crowbar circuits and complete
The control module of power converter working condition, the signal input part of control module, which is connected with, can detect grid voltage sags
Voltage Drop detection device.Control module controls the work of net side current transformer according to the detection signal of Voltage Drop detection device
The input of pattern and Crowbar circuits is cut out.
In the system work process of the present invention, the real-time acquisition testing Voltage Drop detection device signal of control module, if
There is not exception in network voltage and DC bus-bar voltage, and control module controls current transformer normal work, generates electricity by way of merging two or more grid systems；Work as voltage
When falling detection device and detecting that network voltage falls and DC bus-bar voltage is excessively high, signal is passed to control module,
Control module is threatened by the algorithm of low-voltage crossing to determine whether being run to the IGBT of capacitance and current transformer, if full
The condition of sufficient low-voltage crossing triggers the control switch IGBT1 (see Fig. 2) of Crowbar circuits 2 immediately, puts into electric power generation unloading resistance R2, disappears
The extra energy of DC side is consumed, holding capacitor voltage stabilization is in a certain range.And at the same time starting the electricity of full power convertor 1
The STATCOM patterns of net side current transformer pass through the passes such as line impedance between the drop depth of power grid, fault point and current transformer
The reference value of reactive current and watt current is redistributed in the counting of system, reactive power support is provided to power grid, in favor of power grid
Restore.When DC voltage is restored to normal range (NR), such as Fig. 2, the IGBT1 shutdowns of Crowbar circuits, by D1, D2, R1, R2, C
The buffer circuit of composition absorbs the energy of shutdown moment, protects Crowbar circuits.Until network voltage restores, restarting
Full power convertor net side current transformer is generated electricity by way of merging two or more grid systems.
Claims (2)
1. a kind of high-power direct drive permanent magnetic wind generator system low-voltage crossing control system, including it is located at wind-driven generator and electricity
The full power convertor being made of generator-side converter wear and net side current transformer between net, it is characterized in that：In full power convertor
There are one Crowbar circuits for connection on DC bus, which, which further includes one, can control Crowbar circuits and total power
The control module of current transformer working condition, the signal input part of control module are connected with the voltage that can detect grid voltage sags
Fall detection device, control module can acquisition testing Voltage Drop detection device signal in real time, when Voltage Drop detection device
When detecting that network voltage falls and DC bus-bar voltage is excessively high, control signal is sent out immediately by control module, trigger
Crowbar circuits are put into, and at the same time starting the net side current transformer STATCOM patterns of full power convertor.
2. a kind of high-power direct drive permanent magnetic wind generator system low voltage ride through control method, it is characterized in that：This method is based on power
Profit requires the 1 high-power direct drive permanent magnetic wind generator system low-voltage crossing control system；When wind generator system is run,
The real-time acquisition testing Voltage Drop detection device signal of control module, if network voltage and DC bus-bar voltage do not occur it is different
Often, control module control current transformer normal work, generates electricity by way of merging two or more grid systems；When Voltage Drop detection device detects that network voltage falls
It falls and when DC bus-bar voltage is excessively high, sends out control signal immediately by control module, triggering input Crowbar circuits, and
Start the net side current transformer STATCOM patterns of full power convertor simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013627.XA CN105470990B (en) | 2016-01-08 | 2016-01-08 | High-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610013627.XA CN105470990B (en) | 2016-01-08 | 2016-01-08 | High-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105470990A CN105470990A (en) | 2016-04-06 |
| CN105470990B true CN105470990B (en) | 2018-09-18 |
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| CN201610013627.XA Active CN105470990B (en) | 2016-01-08 | 2016-01-08 | High-power direct drive permanent magnetic wind generator system low-voltage crossing control system and control method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109149641A (en) * | 2018-09-26 | 2019-01-04 | 湘电风能有限公司 | A kind of permanent-magnetic wind driven generator group realizes the device and control method of isolated operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102412597A (en) * | 2012-02-07 | 2012-04-11 | 徐州中矿大传动与自动化有限公司 | Low voltage ride through control method and device for a double-fed wind power generation system |
| CN202633966U (en) * | 2012-04-28 | 2012-12-26 | 江苏新誉重工科技有限公司 | System for controlling low voltage ride through of aerogenerator |
| WO2014008647A1 (en) * | 2012-07-12 | 2014-01-16 | General Electric Company | Dynamic braking system for an electric power system and method of operating the same |
| CN103078349B (en) * | 2013-01-17 | 2016-07-20 | 河海大学 | A kind of double-fed wind power generator system and low voltage traversing control method |
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