CN209150730U - Control system for power grid frequency modulation - Google Patents
Control system for power grid frequency modulation Download PDFInfo
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- CN209150730U CN209150730U CN201721443328.6U CN201721443328U CN209150730U CN 209150730 U CN209150730 U CN 209150730U CN 201721443328 U CN201721443328 U CN 201721443328U CN 209150730 U CN209150730 U CN 209150730U
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- 230000005611 electricity Effects 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 2
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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
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Abstract
The utility model discloses a control system of electric wire netting frequency modulation relates to electric wire netting frequency modulation technical field, and the control that control system who has solved current electric wire netting frequency modulation goes on electric wire netting frequency modulation is unstable, and the relatively poor technical problem of accuracy nature. The control system for the frequency modulation of the power grid comprises: the system comprises a power grid frequency deviation monitor, a differentiator, a primary frequency modulation pitch angle auxiliary regulator, a virtual inertia controller and a rotor side inverter; the output end of the power grid frequency deviation monitor is connected with the input end of a differentiator and the input end of a primary frequency modulation pitch angle auxiliary regulator respectively, the output end of the primary frequency modulation pitch angle auxiliary regulator is connected with the input end of a rotor side inverter, the output end of the differentiator is connected with the input end of a virtual inertia controller, and the output end of the virtual inertia controller is connected with the input end of the rotor side inverter. The utility model discloses be applied to the electric wire netting frequency modulation that wind turbine generator system participated in.
Description
Technical field
The utility model relates to power grid frequency modulation technical field more particularly to a kind of control systems of power grid frequency modulation.
Background technique
Currently, the ratio of wind power integration power grid is gradually increased with the fast development of wind-power electricity generation, Frequency Converter Control is utilized
Wind-power electricity generation it is usually full decoupled with network system frequency, be unable to the variation of active response mains frequency, weaken power grid
Rotary inertia and fm capacity bring frequency stability problem so that frequency response characteristic of the power grid under disturbance is deteriorated.Cause
This, the control system for the power grid frequency modulation that research Wind turbines participate in is extremely urgent.
The control system for the power grid frequency modulation that existing Wind turbines participate in needs to acquire air speed data mostly, utilizes wind speed number
It is controlled according to power grid frequency modulation, but in the collection process of air speed data, it will usually have error, so that collected wind speed number
According to not accurate enough, cause the control carried out using the inaccuracy air speed data to power grid frequency modulation unstable, and accuracy is poor, nothing
Method meets the demand of the power network safety operation of Wind turbines participation.
Utility model content
The purpose of this utility model is to provide a kind of control systems of power grid frequency modulation, for stablizing accurately to wind turbine
The power grid frequency modulation that group participates in is controlled, and the power network safety operation requirement of Wind turbines participation is met.
In order to solve the above technical problems, the utility model provides a kind of control system of power grid frequency modulation, using following technology
Scheme:
The control system of the power grid frequency modulation includes: mains frequency deviation monitor, differentiator, primary frequency modulation pitch angle auxiliary
Adjuster, virtual inertia controller and rotor side inverter；Wherein, the output end of the mains frequency deviation monitor respectively with
The input terminal of the differentiator is connected with the input terminal of primary frequency modulation pitch angle auxiliary governor, the primary frequency modulation pitch
The output end of angle auxiliary governor is connected with the input terminal of the rotor side inverter, the output end of the differentiator and the void
The input terminal of quasi- inertia controller is connected, the output end of the virtual inertia controller and the input terminal of the rotor side inverter
It is connected.
Compared with prior art, the control system of power grid frequency modulation provided by the utility model has the advantages that
In the control system of power grid frequency modulation provided by the utility model, the output end of mains frequency deviation monitor is distinguished
It is connected with the input terminal of the input terminal of differentiator and primary frequency modulation pitch angle auxiliary governor, and primary frequency modulation pitch angle auxiliary is adjusted
The output end of section device is connected with the input terminal of rotor side inverter, the output end of differentiator and the input terminal of virtual inertia controller
It is connected, the output end of virtual inertia controller is connected with the input terminal of rotor side inverter, this allows for stating power grid in use
When the power grid frequency modulation that the control system of regulation participates in Wind turbines controls, it is only necessary to pass through mains frequency deviation monitor
It monitors the frequency departure of power grid, the frequency departure is then delivered to primary frequency modulation pitch angle auxiliary governor and differential respectively
Device, can obtain award setting value by primary frequency modulation propeller pitch angle auxiliary governor and power grid off-load runs active power, and
The inertia frequency modulation power that power grid is obtained by differentiator and the virtual inertia controller being connected with the differentiator, by the power grid of acquisition
Off-load operation active power and inertia frequency modulation power are delivered to after rotor side inverter, be can be obtained and are controlled the power grid frequency modulation
The active power of rotor side inverter, without acquire air speed data, be using rotor side inverter and award setting value
The power grid frequency modulation that controllable Wind turbines participate in, the electricity that Wind turbines are participated in caused by avoiding because of air speed data inaccuracy
The case where control of net frequency modulation is unstable and poor accuracy occurs, and stablizes and accurately carries out to the power grid frequency modulation that Wind turbines participate in
Control meets the power network safety operation requirement of Wind turbines participation.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the schematic diagram of the structure of the control system of power grid frequency modulation provided by the embodiment of the utility model.
Description of symbols:
1-mains frequency deviation monitor, 2-differentiators,
3-primary frequency modulation pitch angle auxiliary governors, 4-virtual inertia controllers,
5-rotor side inverters, 6-second adders,
Active computing module needed for 31-primary frequency modulations, 32-off-loads are horizontally disposed with module,
33-pitch angle Control of decreasing load modules, 34-rotor speed detection modules,
35-pitch angle computing modules, 36-first adders,
41-low-pass filters, 42-proportional controllers.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
The utility model embodiment provides a kind of control system of power grid frequency modulation, as shown in Figure 1, the control of the power grid frequency modulation
System includes: mains frequency deviation monitor 1, differentiator 2, primary frequency modulation pitch angle auxiliary governor 3, virtual inertia controller
4 and rotor side inverter 5.Wherein, the output end of mains frequency deviation monitor 1 respectively with the input terminal of differentiator 2 and primary
The input terminal of frequency modulation pitch angle auxiliary governor 3 is connected, and the output end and rotor-side of primary frequency modulation pitch angle auxiliary governor 3 are inverse
The input terminal for becoming device 5 is connected, and the output end of differentiator 2 is connected with the input terminal of virtual inertia controller 4, virtual inertia controller
4 output end is connected with the input terminal of rotor side inverter 5.
Illustratively, the power grid frequency modulation that the control system of power grid frequency modulation participates in Wind turbines is stated in use to control
During, when the frequency of occurrences fluctuates power grid under disturbance, power grid can be monitored by mains frequency deviation monitor 1
Then the frequency departure is delivered to primary frequency modulation pitch angle auxiliary governor 3 and differentiator 2, Ji Ketong by frequency departure respectively
It crosses primary frequency modulation propeller pitch angle auxiliary governor 3 and obtains award setting value and power grid off-load operation active power, and pass through differential
Device 2 and the virtual inertia controller 4 being connected with the differentiator 2 obtain the inertia frequency modulation power of power grid, by the power grid off-load of acquisition
Operation active power and inertia frequency modulation power are delivered to after rotor side inverter 5, be can be obtained and are controlled turning for the power grid frequency modulation
(active power of rotor side inverter 5 is equal to power grid off-load operation active power and inertia tune to the active power of sub- side inverter 5
The sum of frequency power), power grid frequency modulation is controlled using the active power and award setting value of rotor side inverter 5.
In the control system of power grid frequency modulation provided in this embodiment, the output end of mains frequency deviation monitor 1 is distinguished
It is connected with the input terminal of the input terminal of differentiator 2 and primary frequency modulation pitch angle auxiliary governor 3, and primary frequency modulation pitch angle assists
The output end of adjuster 3 is connected with the input terminal of rotor side inverter 5, output end and the virtual inertia controller 4 of differentiator 2
Input terminal is connected, and the output end of virtual inertia controller 4 is connected with the input terminal of rotor side inverter 5, this allows for using
When the power grid frequency modulation that the control system of above-mentioned power grid regulation participates in Wind turbines controls, it is only necessary to inclined by mains frequency
Poor monitor 1 monitors the frequency departure of power grid, then the frequency departure is delivered to primary frequency modulation pitch angle auxiliary respectively and adjusted
Device 3 and differentiator 2 are saved, award setting value can be obtained by primary frequency modulation propeller pitch angle auxiliary governor 3 and power grid off-load is transported
Row active power, and pass through the inertia frequency modulation of differentiator 2 and the virtual inertia controller 4 being connected with the differentiator 2 acquisition power grid
Power can obtain after the power grid off-load operation active power and inertia frequency modulation power of acquisition are delivered to rotor side inverter 5
The active power that the rotor side inverter 5 of the power grid frequency modulation must be controlled utilizes rotor-side inversion without acquiring air speed data
Device 5 and award setting value are the power grid frequency modulation that controllable Wind turbines participate in, and avoiding causes because of air speed data inaccuracy
The power grid frequency modulation that Wind turbines are participated in occur the case where control is unstable and poor accuracy, stablize accurately to wind turbine
The power grid frequency modulation that group participates in is controlled, and the power network safety operation requirement of Wind turbines participation is met.
Illustratively, as shown in Figure 1, above-mentioned primary frequency modulation pitch angle auxiliary governor 3 can include: have needed for primary frequency modulation
Function computing module 31, off-load are horizontally disposed with module 32, pitch angle Control of decreasing load module 33, rotor speed detection module 34 and pitch
Angle computing module 35.Wherein, the input terminal of active computing module 31 and mains frequency deviation monitor 1 needed for primary frequency modulation is defeated
Outlet is connected, and the output end of active computing module 31, off-load needed for primary frequency modulation are horizontally disposed with the output end and rotor of module 32
The output end of Rotating speed measring module 34 is connected with the input terminal of pitch angle Control of decreasing load module 33, pitch angle Control of decreasing load module
33 output end is connected with the input terminal of rotor side inverter 5；The output end of active computing module 31 needed for primary frequency modulation and subtract
The output end for carrying horizontally disposed module 32 is connected with the input terminal of pitch angle computing module 35.
Specifically, in the control of the power grid regulation using the primary frequency modulation pitch angle auxiliary governor 3 for including above structure
When system controls power grid frequency modulation, after the frequency departure that power grid is monitored by mains frequency deviation monitor 1, by this
Frequency departure is delivered to active computing module 31 needed for primary frequency modulation, obtains wind by active computing module 31 needed for primary frequency modulation
The frequency modulation power per unit value of motor group responsive electricity grid frequency variation is horizontally disposed with module 32 by off-load and subtracting for Wind turbines is arranged
Load is horizontal and obtains quantity of power of the Wind turbines in the off-load level run.On the one hand, by the frequency modulation power per unit value and wind
Quantity of power of the motor group in the off-load level run is delivered to pitch angle Control of decreasing load module 33, while rotor speed being detected
The rotor speed that module 34 detects is also sent to pitch angle Control of decreasing load module 33, and pitch angle Control of decreasing load module 33 can lead to
It crosses the quantity of power and rotor speed of frequency modulation power per unit value, Wind turbines in the off-load level run and obtains power grid off-load fortune
Row active power, and power grid off-load operation active power is sent to rotor side inverter 5；On the other hand, by the frequency modulation function
The quantity of power of rate per unit value and Wind turbines in the off-load level run is delivered to pitch angle computing module 35, and propeller pitch angle calculates
Module 35 can obtain award setting by the quantity of power of frequency modulation power per unit value and Wind turbines in the off-load level run
Value.Finally, running the inertia frequency modulation function of the power grid of active power and the acquisition of virtual inertia controller 4 according to the power grid off-load of acquisition
Rate can be obtained the active power for controlling the rotor side inverter 5 of the power grid frequency modulation, utilize rotor side inverter 5 and propeller pitch angle control
Value processed controls power grid frequency modulation.
Optionally, as shown in Figure 1, the output end of active computing module 31 and off-load needed for above-mentioned primary frequency modulation are horizontally disposed
The output end of module 32 is connected with the input terminal of first adder 36, and the output end of first adder 36 subtracts with pitch angle respectively
The input terminal for carrying control module 33 is connected with the input terminal of pitch angle computing module 35.
Specifically, the active computing module 31 needed for through primary frequency modulation obtains the variation of Wind turbines responsive electricity grid frequency
Frequency modulation power per unit value is horizontally disposed with quantity of power of the acquisition Wind turbines of module 32 in a certain off-load level run by off-load
Later, the function of frequency modulation power per unit value and Wind turbines in a certain off-load level run will can be obtained by first adder 36
After rate amount is added, quantity of power when the frequency modulation power per unit value and Wind turbines that will be obtained are in a certain off-load level run it
It is delivered to pitch angle Control of decreasing load module 33 and pitch angle computing module 35 respectively.
Similarly, as shown in Figure 1, the input of the output end and virtual inertia controller 4 of pitch angle Control of decreasing load module 33
End can also be connected with the input terminal of second adder 6, the output end of second adder 6 and the input terminal of rotor side inverter 5
It is connected.
Illustratively, as shown in Figure 1, virtual inertia controller 4 may include low-pass filter 41 and proportional controller 42.Its
In, the output end of differentiator 2 is connected with 41 input terminal of low-pass filter, the output end and proportional controller 42 of low-pass filter 41
Input terminal be connected, the output end of proportional controller 42 is connected with the input terminal of rotor side inverter 5.Specifically, it first passes through micro-
Divide device 2 to monitor that the frequency departure of power grid carries out differential process to mains frequency deviation monitor 1, then passes through low-pass filter
41 eliminate the interference of grid frequency measurement noise, to further increase the accuracy of grid frequency measurement, then pass through ratio tune
It saves device 42 and obtains inertia frequency modulation performance number, and the inertia frequency modulation performance number is delivered to rotor side inverter 5.In addition, when above-mentioned
It, then can be by inertia frequency modulation performance number that proportional controller 42 exports when the control system of power grid frequency modulation further includes second adder 6
It is delivered to second adder 6, which is added with power grid off-load operation active power, obtains and controls the power grid
The active power of the rotor side inverter 5 of frequency modulation, and the active power is delivered to rotor side inverter 5.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (5)
1. a kind of control system of power grid frequency modulation characterized by comprising mains frequency deviation monitor, differentiator, primary tune
Frequency pitch angle auxiliary governor, virtual inertia controller and rotor side inverter；Wherein, the mains frequency deviation monitor
Output end is connected with the input terminal of the input terminal of the differentiator and primary frequency modulation pitch angle auxiliary governor respectively, described
The output end of primary frequency modulation pitch angle auxiliary governor is connected with the input terminal of the rotor side inverter, the differentiator it is defeated
Outlet is connected with the input terminal of the virtual inertia controller, and the output end of the virtual inertia controller and the rotor-side are inverse
The input terminal for becoming device is connected.
2. the control system of power grid frequency modulation according to claim 1, which is characterized in that primary frequency modulation pitch angle auxiliary
Adjuster includes: that active computing module, off-load needed for primary frequency modulation are horizontally disposed with module, pitch angle Control of decreasing load module, rotor
Rotating speed measring module and pitch angle computing module；Wherein, the input terminal of active computing module needed for the primary frequency modulation with it is described
The output end of mains frequency deviation monitor is connected, the output end of active computing module, the off-load needed for the primary frequency modulation
The output end of the output end of horizontally disposed module and the rotor speed detection module with the pitch angle Control of decreasing load module
Input terminal be connected, the output end of the pitch angle Control of decreasing load module is connected with the input terminal of the rotor side inverter；Institute
State the output end of active computing module and the off-load needed for primary frequency modulation be horizontally disposed with module output end with the pitch
The input terminal of angle computing module is connected.
3. the control system of power grid frequency modulation according to claim 2, which is characterized in that active meter needed for the primary frequency modulation
The output end that the output end and the off-load for calculating module are horizontally disposed with module is connected with the input terminal of first adder, and described the
The output end of one adder is defeated with the input terminal of the pitch angle Control of decreasing load module and pitch angle computing module respectively
Enter end to be connected.
4. the control system of power grid frequency modulation according to claim 2, which is characterized in that the pitch angle Control of decreasing load module
Output end and the input terminal of the virtual inertia controller be connected with the input terminal of second adder, the second adder
Output end be connected with the input terminal of the rotor side inverter.
5. the control system of power grid frequency modulation according to claim 1, which is characterized in that the virtual inertia controller includes
Low-pass filter and proportional controller；Wherein, the output end of the differentiator is connected with the low-pass filter input terminal, described
The output end of low-pass filter is connected with the input terminal of the proportional controller, the output end of the proportional controller with described turn
The input terminal of sub- side inverter is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721443328.6U CN209150730U (en) | 2017-10-31 | 2017-10-31 | Control system for power grid frequency modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721443328.6U CN209150730U (en) | 2017-10-31 | 2017-10-31 | Control system for power grid frequency modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209150730U true CN209150730U (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721443328.6U Active CN209150730U (en) | 2017-10-31 | 2017-10-31 | Control system for power grid frequency modulation |
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| Country | Link |
|---|---|
| CN (1) | CN209150730U (en) |
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2017
- 2017-10-31 CN CN201721443328.6U patent/CN209150730U/en active Active
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